CN106549740B

CN106549740B - A kind of method, apparatus and system obtaining channel sequence in a communications system

Info

Publication number: CN106549740B
Application number: CN201510609076.9A
Authority: CN
Inventors: 金婧; 童辉; 王启星
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2015-09-22
Filing date: 2015-09-22
Publication date: 2019-08-30
Anticipated expiration: 2035-09-22
Also published as: CN106549740A

Abstract

The invention discloses a kind of methods for obtaining channel sequence in a communications system, apparatus and system, in the method, base station sends the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol that frame structure is configured to part PRB to terminal, the RI-RS of the corresponding position the RE setting non-zero power CSI-RS of the corresponding OFDM symbol of another part PRB answered to the part PRB pair, wherein, the part PRB and another part PRB are located in same subframe, to measure channel sequence according to the RI-RS received by the terminal, and the channel sequence that measurement obtains is fed back into the base station, to know corresponding channel capacity, to improve the power of RI-RS while the RI-RS expense for realizing minimum 2RE/PRB, in turn RI-RS is improved to the estimated accuracy of channel sequence.

Description

A kind of method, apparatus and system obtaining channel sequence in a communications system

Technical field

The present invention relates to wireless communication technology field, more particularly to a kind of method for obtaining channel sequence in a communications system, Apparatus and system.

Background technique

Existing communication system is passed as being used to improve system in LTE (Long Term Evolution, long term evolution) system Transmission quality, the mode for improving power system capacity generally use traditional 2D MIMO (Multiple-Input Multiple- Output, multiple-input and multiple-output) technology, the basic principle is that improving transmission matter using the two-dimensional space freedom degree on horizontal plane Amount improves power system capacity.In current physical layer technology not compared under quantum jump background, how further future broadband wireless communication systems are Transmission quality, spectrum efficiency are improved, more feasible direction is abundant excavation vertical space freedom degree, traditional 2D MIMO skill Art expands to 3D MIMO technology, and the freedom degree of three-dimensional space is made full use of to improve system performance.3D-MIMO antenna distribution map It can be as shown in Figure 1, the antenna of the N root horizontal direction in original 2D mimo antenna distribution to be extended to the N of matrix form in figure × M ties up antenna, and wherein horizontal direction has N root antenna, and vertical direction has M root antenna, and every horizontal antenna originally is vertical by M The antenna element in direction forms.

During disposing 3D-MIMO antenna, original 2~8 channel is extended to more than 8 channels, for example, typically There are 16,32,64 or 128 channels etc., since port number is excessive, base station obtains CSI by way of feeding back based on code book When (Channel State Indication, channel state information), if directly transmitting the CSI-RS of 32 or 64 ports (Channel State Indication-reference signal channel state information reference signals), then will lead to CSI- RS expense is excessive, and code book feedback quantity also greatly increases.Specifically, it is contemplated that the requirement of CSI-RS precision of channel estimation, CSI- The expense of RS is the port 1RE/PRB/, and the CSI-RS expense of 32 ports is 32RE/PRB, and expense is larger.With 2 port CSI-RS For, existing TDD (Time Division Duplexing, time division duplex) system and FDD (Frequency Division Dual, frequency division duplex) in system, the resource location that CSI-RS is occupied respectively can be as shown in Figure 2.It should be noted that existing CSI-RS is divided to for two kinds: zero energy ZP CSI-RS and non-zero power NZP CSI-RS.NZP CSI-RS refers in PRB It sends out (Resource Element, the resource unit) position corresponding RE of (Physical Resource Block, Physical Resource Block) CSI-RS sequence is sent, estimates channel for UE, ZP CSI-RS refers to punch in the corresponding position RE PRB, any signal is not sent, Interference when for reducing the estimation of adjacent cell NZP CSI-RS upper signal channel.

And when obtaining CSI according to the mode based on channel reciprocity, it is contemplated that terminal transmission antenna number N_TXLess than reception Antenna number N_RXThe case where, terminal usually only configures 1 transmission antenna, and the mode based on channel reciprocity is only capable of supporting N_TXStream Transmission or even single-stream transmission, lead to not provide multiple stream transmission well.

Therefore, it in order to preferably support multiple stream transmission and guarantee lower CSI-RS expense, can be sent by base station end It is only used for the reference signal RI-RS of measurement channel sequence, such terminal is based on this feedback channel order, preferably multithread can be supported to pass It is defeated.That is, the frame structure configuration mode of existing CSI-RS can be directly used to obtain the order of channel.But due to terminal RI-RS is estimated only for obtaining channel sequence, and not only includes RI (rank in the CSI for utilizing CSI-RS measurement to obtain Indication, order index), it further include CQI (Channel Quality Indicator, channel quality instruction) and/or PMI Therefore (Precoding Matrix Indicator, pre-coding matrix instruction) etc. is configured using the frame structure of existing CSI-RS Mode is larger come the order expense for obtaining channel.

In addition, CSI-RS is cell level transmission, it is contemplated that the advantage for giving full play to 3D-MIMO enhancing covering then needs The power for sending CSI-RS sequence is improved, as shown in figure 3, enhance power configuration schematic diagram for NZP CSI-RS in the prior art, 0, the 1 corresponding position RE is marked in figure for sending NZP CSI-RS sequence, corresponding two shades below 0, the 1 corresponding position RE The position RE user send ZP CSI-RS, the power on two shades is added on 0, the 1 corresponding position RE, to mention Rise the power of NZP CSI-RS.But need to configure two sets of CSI-RS information modes for terminal thus to inform that terminal sends NZP The position RE of CSI-RS sequence and the position RE of ZP CSI-RS, minimal-overhead 4RE/PRB, if it is desired to further be promoted Power then needs bigger CSI-RS expense.

As shown in the above, when system only needs to obtain channel sequence, according to the frame structure configuration side of existing CSI-RS Formula obtains the order of channel, then can there are problems that CSI-RS expense increases with power ascension.

Summary of the invention

The embodiment of the invention provides a kind of method, apparatus and system for obtaining channel sequence in a communications system, to solve Certainly when system only needs to obtain channel sequence, the order of channel is obtained according to the frame structure configuration mode of existing CSI-RS, then can There are problems that CSI-RS expense increases with power ascension.

The embodiment of the invention provides a kind of methods for obtaining channel sequence in a communications system, comprising:

Base station sends the reference signal RI-RS for measuring channel sequence to terminal, with by the terminal according to receiving The RI-RS measures channel sequence, and the channel sequence that measurement obtains is fed back to the base station, wherein the frame structure of the RI-RS It is configured to corresponding OFDM (Orthogonal Frequency Division Multiplexing, the orthogonal frequency division multiplexing of part PRB With technology) zero energy CSI-RS is arranged in the corresponding position RE of symbol, and it is corresponding to another part PRB that the part PRB pair is answered Non-zero power CSI-RS is arranged in the corresponding position RE of OFDM symbol, wherein the part PRB is located at another part PRB In same subframe；

The channel sequence of the terminal feedback is received, to know corresponding channel capacity.

Further, the frame structure of the RI-RS is configured to the K in the whole bandwidth by RI-RS continuous intermediate PRB's Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, wherein K is the positive integer greater than 1.

Further, the frame structure of the RI-RS is configured to the corresponding OFDM symbol pair of the n-th PRB in each subframe The position the RE setting non-zero power CSI-RS answered, and every the corresponding position RE of the corresponding OFDM symbol of next PRB of M PRB Non-zero power CSI-RS is set, and zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of other PRB, wherein N, M For positive integer.

Further, the frame structure of the RI-RS is configured to that frequency shift (FS) is added between each subframe.

Further, the frame structure of the RI-RS is configured to the corresponding OFDM symbol pair of the n-th PRB of i-th of subframe The position the RE setting non-zero power CSI-RS answered, and every the corresponding position RE of the corresponding OFDM symbol of next PRB of M PRB Non-zero power CSI-RS is set, and zero energy CSI-RS, i+1 is arranged in the corresponding position the RE symbol of the corresponding OFDM of other PRB Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of the N+1 PRB of subframe, and every under M PRB Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of one PRB, and the corresponding OFDM of other PRB is RE corresponding Set symbol is arranged zero energy CSI-RS, the corresponding OFDM symbol of remaining subframe successively next PRB after one PRB of rearward displacement Non-zero power CSI-RS is arranged in the corresponding position RE, and RE corresponding every the corresponding OFDM symbol of next PRB of M PRB Non-zero power CSI-RS is installed, zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of other PRB, wherein I, N, M are positive integer.

Further, the embodiment of the invention also provides another methods for obtaining channel sequence in a communications system, comprising:

Terminal receives the reference signal RI-RS for being used to measure channel sequence that base station is sent, wherein the frame knot of the RI-RS Structure is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, answers with the part PRB pair Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of another part PRB, wherein the part PRB and institute Another part PRB is stated to be located in same subframe；

Channel sequence is measured according to the RI-RS, and the channel sequence that measurement obtains is fed back into the base station, by the base Know corresponding channel capacity in station.

Further, the embodiment of the invention also provides a kind of base stations, comprising:

Transmission unit, for sending the reference signal RI-RS for measuring channel sequence to terminal, with by the terminal according to The RI-RS measurement channel sequence received, and the channel sequence that measurement obtains is fed back into the base station, wherein the RI-RS Frame structure be configured to the corresponding OFDM symbol corresponding position the RE setting zero energy CSI-RS of part PRB, with the part PRB Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of corresponding another part PRB, wherein the part PRB and another part PRB are located in same subframe；

Receiving unit, for receiving the channel sequence of the terminal feedback, to know corresponding channel capacity.

Further, the embodiment of the invention also provides a kind of terminals, comprising:

Receiving unit, for receiving the reference signal RI-RS for being used to measure channel sequence of base station transmission, wherein the RI- The frame structure of RS is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, with the part Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol for another part PRB that PRB pair is answered, wherein the portion PRB and another part PRB is divided to be located in same subframe；

The channel sequence that measurement obtains for measuring channel sequence according to the RI-RS, and is fed back to the base by processing unit It stands, to know corresponding channel capacity by the base station.

Further, the embodiment of the invention also provides a kind of systems for obtaining channel sequence in a communications system, comprising:

Base station, for sending the reference signal RI-RS for measuring channel sequence to terminal, wherein the frame knot of the RI-RS Structure is configured to the corresponding OFDM symbol position the corresponding resource unit RE setting zero energy CSI-RS of part PRB, with the part Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol for another part PRB that PRB pair is answered, and, receive institute The channel sequence for stating terminal feedback, to know corresponding channel capacity, wherein the part PRB is located at another part PRB In same subframe.

Terminal, the RI-RS sent for receiving the base station, and channel sequence is measured according to the RI-RS, and, The channel sequence that measurement obtains is fed back into the base station.

The present invention has the beneficial effect that:

The embodiment of the invention provides a kind of method, apparatus and system for obtaining channel sequence in a communications system, in the party In method, base station sends the reference signal RI-RS for measuring channel sequence to terminal, with as the terminal according to receiving RI-RS measures channel sequence, and the channel sequence that measurement obtains is fed back to the base station, wherein the frame structure of the RI-RS configures For the corresponding OFDM symbol corresponding position RE of part PRB, zero energy CSI-RS, another portion answered with the part PRB pair are set Divide the corresponding OFDM symbol of the PRB corresponding position RE that non-zero power CSI-RS is set, and receives the channel of the terminal feedback Order, to know corresponding channel capacity.That is, in the technical solution described in the embodiment of the present invention, base station is by terminal Zero energy CSI-RS and the part is arranged in the corresponding position RE of corresponding OFDM symbol that transmission frame structure is configured to part PRB The RI-RS of the corresponding position the RE setting non-zero power CSI-RS of the corresponding OFDM symbol for another part PRB that PRB pair is answered, thus The power of RI-RS is improved while the RI-RS expense for realizing minimum 2RE/PRB, and then improves RI-RS to channel sequence Estimated accuracy.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 show 3DMIMO antenna schematic diagram in the prior art；

Fig. 2 show the frame structure configuration schematic diagram of CSI-RS in the prior art；

Fig. 3, which show NZP CSI-RS in the prior art, enhances power configuration schematic diagram；

The process that Fig. 4 show the method that one kind described in the embodiment of the present invention one obtains channel sequence in a communications system is shown It is intended to；

Fig. 5 A show a kind of frame structure configuration schematic diagram of RI-RS described in the embodiment of the present invention one；

Fig. 5 B show a kind of frame structure configuration schematic diagram of RI-RS described in the embodiment of the present invention one；

Fig. 5 C show a kind of another frame structure configuration schematic diagram of RI-RS described in the embodiment of the present invention one；

Fig. 5 D show a kind of another frame structure configuration schematic diagram of RI-RS described in the embodiment of the present invention one；

Fig. 6 show a kind of another frame structure configuration schematic diagram of RI-RS described in the embodiment of the present invention one；

Fig. 7 show the process that another kind described in the embodiment of the present invention two obtains the method for channel sequence in a communications system Schematic diagram；

Fig. 8 show the interactive stream that one kind described in the embodiment of the present invention three obtains the method for channel sequence in a communications system Journey schematic diagram；

Fig. 9 show a kind of structural schematic diagram of base station described in the embodiment of the present invention four；

Figure 10 show a kind of structural schematic diagram of terminal described in the embodiment of the present invention four；

Figure 11 show the structure that one kind described in the embodiment of the present invention four obtains the system of channel sequence in a communications system Schematic diagram.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts All other embodiment, shall fall within the protection scope of the present invention.

Embodiment one:

The embodiment of the present invention one provides a kind of method for obtaining channel sequence in a communications system, as shown in figure 4, it is this The flow diagram of the method for channel sequence is obtained described in inventive embodiments one in a communications system, the method may include following Step:

Step 401: base station sends the reference signal RI-RS for measuring channel sequence to terminal, with by the terminal according to The RI-RS measurement channel sequence received, and the channel sequence that measurement obtains is fed back into the base station, wherein the RI-RS Frame structure be configured to the corresponding OFDM symbol corresponding position the RE setting zero energy CSI-RS of part PRB, with the part PRB Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of corresponding another part PRB.

Wherein, the part PRB and another part PRB are located in same subframe.

Step 402: the channel sequence of the terminal feedback is received, to know corresponding channel capacity.

That is, base station is configured to by sending frame structure to terminal in the technical solution described in the embodiment of the present invention Zero energy CSI-RS, the another part answered with the part PRB pair is arranged in the corresponding position RE of the corresponding OFDM symbol of part PRB The RI-RS of the corresponding OFDM symbol of the PRB corresponding position RE setting non-zero power CSI-RS, wherein the part PRB with it is described Another part PRB is located in same subframe, to improve RI-RS while the RI-RS expense for realizing minimum 2RE/PRB Power, and then improve RI-RS to the estimated accuracy of channel sequence.

Optionally, the frame structure configuration of the RI-RS can be for by the continuous intermediate PRB's of K in the whole bandwidth of RI-RS Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, wherein K is the positive integer greater than 1.

It, then can be by the corresponding of 7 continuous intermediate PRB for example, it is assumed that include 100 PRB in the whole bandwidth of RI-RS Non-zero power CSI-RS, the corresponding position the RE symbol setting of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS, and then realize that zero energy CSI-RS, another portion is arranged in the corresponding position RE of the corresponding OFDM symbol of part PRB Divide the frame structure collocation form of the RI-RS of the corresponding position the RE setting non-zero power CSI-RS of the corresponding OFDM symbol of PRB, thus The power of RI-RS is improved while the RI-RS expense for realizing minimum 2RE/PRB, and then improves RI-RS to channel sequence Estimated accuracy.

Optionally, the frame structure configuration of the RI-RS can also be by the corresponding OFDM symbol of the n-th PRB in each subframe Non-zero power CSI-RS is arranged in the corresponding position RE, and RE corresponding every the corresponding OFDM symbol of next PRB of M PRB Non-zero power CSI-RS is installed, zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of other PRB, wherein N, M are positive integer.

For example, by taking TDD system as an example, the frame structure configuration diagram of RI-RS two-port can as shown in left hand view in Fig. 5 A, wherein N=1, M=1, in figure, 0,1 respectively indicates two ports of RI-RS, by left hand view in Fig. 5 A it is found that the of first PRB Where the corresponding OFDM symbol #8 and #10 of one subcarrier the position RE setting non-zero power CSI-RS to send CSI-RS sequence, The position RE setting zero energy CSI-RS where the corresponding OFDM symbol #8 and #10 of the first subcarrier in second PRB (is beaten Hole) so that the power enhancing on the adjacent position RE for sending CSI-RS sequence, and then realize the RI- of minimum 2RE/PRB Improve the power of RI-RS while RS expense, and through maximum known to experiment can hoisting power be 3dB, further more, with FDD system For the frame structure configuration diagram of RI-RS two-port can be as shown in right part of flg in Fig. 5 A, the embodiment of the present invention does not repeat this. Correspondingly, in M=1, by taking TDD system as an example, the frame structure configuration diagram of the RI-RS two-port comprising multiple PRB can be such as Fig. 5 B It is shown.

For another example work as N=1, when M=2, the frame structure configuration diagram of the RI-RS two-port comprising multiple PRB can be such as Fig. 5 C institute Show, and through experiment it is found that the configuration mode is while the RI-RS expense for realizing minimum 2RE/PRB, by the power of RI-RS Improve 4.7dB；Further more, the frame structure configuration diagram of the RI-RS two-port comprising multiple PRB can be as shown in Figure 5 D as M=3, The configuration mode is while the RI-RS expense for realizing minimum 2RE/PRB, by the power ascension of RI-RS 6dB.

Further, for average acquisition channel sequence, frequency shift (FS) can be added between different subframes to configure The position RE of CSI-RS sequence is sent, it is specific implementable are as follows: the corresponding OFDM symbol of the n-th PRB of i-th of subframe is corresponding Non-zero power CSI-RS is arranged in the position RE, and every the corresponding position the RE setting of the corresponding OFDM symbol of next PRB of M PRB Zero energy CSI-RS, i+1 subframe is arranged in the corresponding position the RE symbol of the corresponding OFDM of non-zero power CSI-RS, other PRB The corresponding OFDM symbol corresponding position RE of the N+1 PRB non-zero power CSI-RS is set, and every the next of M PRB Non-zero power CSI-RS, the corresponding position RE the corresponding OFDM of other PRB is arranged in the corresponding position RE of the corresponding OFDM symbol of PRB Symbol is arranged zero energy CSI-RS, the corresponding OFDM symbol pair of remaining subframe successively next PRB after one PRB of rearward displacement The position the RE setting non-zero power CSI-RS answered, and every the corresponding position RE of the corresponding OFDM symbol of next PRB of M PRB Non-zero power CSI-RS is set, and zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of other PRB, wherein i, N, M are positive integer.

For example, work as i=1, when N=1, M=2, it is assumed that the frame structure of the RI-RS comprising 3 subframes is configured that Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of first PRB of one subframe, and every 2 PRB The corresponding OFDM symbol corresponding position RE of next PRB non-zero power CSI-RS is set, the corresponding OFDM of other PRB is corresponding Zero energy CSI-RS is arranged in the position RE symbol, in the corresponding position RE of corresponding OFDM symbol of second PRB of second subframe Non-zero power CSI-RS is set, and non-zero power is set every the corresponding position RE of the corresponding OFDM symbol of next PRB of 2 PRB Zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of rate CSI-RS, other PRB, in the third of third subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of a PRB, and every the corresponding of next PRB of 2 PRB Non-zero power CSI-RS, the corresponding position the RE symbol setting of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS, specifically can be as shown in fig. 6, be the frame structure configuration diagram of RI-RS two-port in TDD system, wherein 0,1 point Not Biao Shi RI-RS two ports.

The embodiment of the present invention one provides a kind of method for obtaining channel sequence in a communications system, in the method, base station The reference signal RI-RS for measuring channel sequence is sent to terminal, to be measured by the terminal according to the RI-RS received Channel sequence, and the channel sequence that measurement obtains is fed back into the base station, wherein the frame structure of the RI-RS is configured to part PRB The corresponding OFDM symbol corresponding position RE zero energy CSI-RS, the phase of another part PRB answered with the part PRB pair are set Answer the corresponding position the RE setting non-zero power CSI-RS of OFDM symbol, wherein the part PRB and described another part PRB In same subframe, and the channel sequence of the terminal feedback is received, to know corresponding channel capacity.That is, at this In technical solution described in inventive embodiments, base station is by sending the corresponding OFDM symbol that frame structure is configured to part PRB to terminal Zero energy CSI-RS is arranged in the corresponding position RE, and the corresponding OFDM symbol of another part PRB answered to the part PRB pair is corresponding The position RE setting non-zero power CSI-RS RI-RS, to be mentioned while the RI-RS expense for realizing minimum 2RE/PRB The high power of RI-RS, and then RI-RS is improved to the estimated accuracy of channel sequence.

Embodiment two

The embodiment of the present invention two to act the side of executioning as terminal, to described in the embodiment of the present invention one in communication system The middle method for obtaining channel sequence is further described, as shown in fig. 7, it is described in the embodiment of the present invention two in communication system The flow diagram of the middle method for obtaining channel sequence, the method can comprise the following steps that

Step 701: terminal receives the reference signal RI-RS for being used to measure channel sequence that base station is sent, wherein the RI- The frame structure of RS is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, with the part Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol for another part PRB that PRB pair is answered.

Wherein, the part PRB and another part PRB are located in same subframe.

Step 702: channel sequence is measured according to the RI-RS, and the channel sequence that measurement obtains is fed back into the base station, with Corresponding channel capacity is known by the base station.

That is, terminal is configured to part PRB by receiving frame structure in the technical solution described in the embodiment of the present invention The corresponding OFDM symbol corresponding position RE zero energy CSI-RS, the phase of another part PRB answered with the part PRB pair are set The RI-RS of the corresponding position the RE setting non-zero power CSI-RS of OFDM symbol is answered to measure channel sequence and feed back to base station, wherein The part PRB and another part PRB are located in same subframe, thus in the RI-RS expense for realizing minimum 2RE/PRB While improve the power of RI-RS, and then improve RI-RS to the estimated accuracy of channel sequence.

It, then can be by the corresponding of the 7th continuous intermediate PRB for example, it is assumed that include 100 PRB in the whole bandwidth of RI-RS Non-zero power CSI-RS, the corresponding position the RE symbol setting of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS, and then realize that zero energy CSI-RS, another portion is arranged in the corresponding position RE of the corresponding OFDM symbol of part PRB Divide the frame structure collocation form of the RI-RS of the corresponding position the RE setting non-zero power CSI-RS of the corresponding OFDM symbol of PRB, thus The power of RI-RS is improved while the RI-RS expense for realizing minimum 2RE/PRB, and then improves RI-RS to channel sequence Estimated accuracy.

Second embodiment of the present invention provides a kind of methods for obtaining channel sequence in a communications system, in the method, terminal Receive the reference signal RI-RS for being used to measure channel sequence that base station is sent, wherein the frame structure of the RI-RS is configured to part Zero energy CSI-RS, another part PRB answered with the part PRB pair is arranged in the corresponding position RE of the corresponding OFDM symbol of PRB The corresponding OFDM symbol corresponding position RE non-zero power CSI-RS is set, wherein the part PRB and described another part PRB is located in same subframe, and measures channel sequence according to the RI-RS, and will the obtained channel sequence of measurement feed back to it is described Base station, to know corresponding channel capacity by the base station.That is, in the technical solution described in the embodiment of the present invention, base It stands by sending the corresponding position the RE setting zero energy CSI- of corresponding OFDM symbol that frame structure is configured to part PRB to terminal The corresponding position the RE setting non-zero power CSI-RS of corresponding OFDM symbol of RS, another part PRB answered to the part PRB pair RI-RS, to improve the power of RI-RS while the RI-RS expense for realizing minimum 2RE/PRB, and then improve Estimated accuracy of the RI-RS to channel sequence.

Embodiment three

The embodiment of the present invention three is being led to so that base station and terminal interaction execute as an example to described in the embodiment of the present invention one to two The method that channel sequence is obtained in letter system is further described, as shown in figure 8, it is described in the embodiment of the present invention three logical The flow diagram of the method for channel sequence is obtained in letter system, the method can comprise the following steps that

Step 801: base station sends the reference signal RI-RS for measuring channel sequence to terminal, wherein the RI-RS's Frame structure is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, with the part PRB pair Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of another part PRB answered.

Wherein, the part PRB and another part PRB are located in same subframe.

Optionally, the frame structure configuration of the RI-RS can also be that the corresponding OFDM symbol of first PRB is RE corresponding Zero setting power CSI-RS is installed, and zero energy is set every the corresponding OFDM symbol of next PRB of the N number of PRB corresponding position RE Non-zero power CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of CSI-RS, other PRB, wherein N is positive integer.

Step 802: terminal receives the RI-RS, and measures channel sequence according to the RI-RS, and measurement is obtained Channel sequence feeds back to the base station.

Step 803: base station receives the channel sequence of the terminal feedback, to know corresponding channel capacity.

The embodiment of the present invention three provides a kind of method for obtaining channel sequence in a communications system, in the method, base station The reference signal RI-RS for measuring channel sequence is sent to terminal, to be measured by the terminal according to the RI-RS received Channel sequence, and the channel sequence that measurement obtains is fed back into the base station, wherein the frame structure of the RI-RS is configured to part PRB The corresponding OFDM symbol corresponding position RE zero energy CSI-RS, the phase of another part PRB answered with the part PRB pair are set Answer the corresponding position the RE setting non-zero power CSI-RS of OFDM symbol, wherein the part PRB and described another part PRB In same subframe, and the channel sequence of the terminal feedback is received, to know corresponding channel capacity.That is, at this In technical solution described in inventive embodiments, base station is by sending the corresponding OFDM symbol that frame structure is configured to part PRB to terminal Zero energy CSI-RS is arranged in the corresponding position RE, and the corresponding OFDM symbol of another part PRB answered to the part PRB pair is corresponding The position RE setting non-zero power CSI-RS RI-RS, to be mentioned while the RI-RS expense for realizing minimum 2RE/PRB The high power of RI-RS, and then RI-RS is improved to the estimated accuracy of channel sequence.

Example IV

Based on inventive concept identical with the embodiment of the present invention one, the embodiment of the present invention four provides a kind of base station, the base The specific implementation stood can be found in the associated description in above method embodiment one, and overlaps will not be repeated, structural schematic diagram As shown in figure 9, the base station is main can include:

Transmission unit 91 can be used for sending the reference signal RI-RS for measuring channel sequence to terminal, by the terminal Channel sequence is measured according to the RI-RS received, and the channel sequence that measurement obtains is fed back into the base station, wherein is described The frame structure of RI-RS is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, with the portion The corresponding position the RE setting non-zero power CSI-RS of the corresponding OFDM symbol for another part PRB for dividing PRB pair to answer, wherein described Part PRB and another part PRB are located in same subframe；

Receiving unit 92 can be used for receiving the channel sequence of the terminal feedback, to know corresponding channel capacity.

Further, it is based on inventive concept identical with the embodiment of the present invention two, the embodiment of the present invention four additionally provides one Kind terminal, the specific implementation of the terminal can be found in the associated description in above method embodiment two, and overlaps will not be repeated, Structural schematic diagram is as shown in Figure 10, and the terminal is main can include:

Receiving unit 101 can be used for receiving the reference signal RI-RS for being used to measure channel sequence of base station transmission, wherein institute The frame structure for stating RI-RS is configured to the corresponding OFDM symbol corresponding position the RE setting zero energy CSI-RS of part PRB, and described Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol for another part PRB that part PRB pair is answered, wherein institute It states part PRB and another part PRB is located in same subframe；

Processing unit 102 can be used for measuring channel sequence according to the RI-RS, and the channel sequence that measurement obtains fed back to The base station, to know corresponding channel capacity by the base station.

Further, it is based on inventive concept identical with the embodiment of the present invention one and two, the embodiment of the present invention four also provides A kind of system obtaining channel sequence in a communications system, the specific implementation of the system can be found in above method embodiment one and two In associated description, overlaps will not be repeated, and structural schematic diagram is as shown in figure 11, this obtains channel sequence in a communications system System it is main can include:

Base station 111 can be used for sending the reference signal RI-RS for measuring channel sequence to terminal 112, wherein the RI- The frame structure of RS is configured to the corresponding position the RE setting zero energy CSI-RS of corresponding OFDM symbol of part PRB, with the part Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol for another part PRB that PRB pair is answered, and, receive institute The channel sequence of the feedback of terminal 112 is stated, to know corresponding channel capacity, wherein the part PRB and another part PRB In same subframe.

Terminal 112, the RI-RS sent for receiving the base station 111, and channel sequence is measured according to the RI-RS, And the channel sequence that measurement obtains is fed back into the base station 111.

It will be understood by those skilled in the art that the embodiment of the present invention can provide as method, apparatus (equipment) or computer journey Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the present invention The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product And/or block diagram describes.It should be understood that each process in flowchart and/or the block diagram can be realized by computer program instructions And/or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer programs to refer to Enable the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate One machine so that by the instruction that the processor of computer or other programmable data processing devices executes generate for realizing The device for the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of method for obtaining channel sequence in a communications system characterized by comprising

Base station sends the reference signal RI-RS for measuring channel sequence to terminal, with as the terminal according to receiving RI-RS measures channel sequence, and the channel sequence that measurement obtains is fed back to the base station, wherein the frame structure of the RI-RS configures For the respective orthogonal frequency multiplexing technique OFDM symbol position corresponding resource unit RE of part physical resource block PRB, zero power is set The corresponding OFDM symbol of rate channel state information reference signals CSI-RS, another part PRB answered to the part PRB pair are corresponding The position RE non-zero power CSI-RS is set, wherein the part PRB and another part PRB are located in same subframe；

2. the method as described in claim 1, which is characterized in that the frame structure of the RI-RS is configured to the entire band of RI-RS Non-zero power CSI-RS, the phase of other PRB is arranged in the corresponding position RE of corresponding OFDM symbol of K continuous intermediate PRB in width Answer the corresponding position the RE symbol setting zero energy CSI-RS of OFDM, wherein K is the positive integer greater than 1.

3. the method as described in claim 1, which is characterized in that the frame structure of the RI-RS is configured to the N in each subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of a PRB, and every the corresponding of next PRB of M PRB Non-zero power CSI-RS, the corresponding position the RE symbol setting of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS, wherein N, M are positive integer.

4. such as method as claimed in any one of claims 1-3, which is characterized in that the frame structure of the RI-RS is configured in each son Frequency shift (FS) is added between frame.

5. method as claimed in claim 4, which is characterized in that the frame structure of the RI-RS is configured to the of i-th of subframe Non-zero power CSI-RS, and the phase of next PRB every M PRB is arranged in the corresponding position RE of the corresponding OFDM symbol of N number of PRB The corresponding position the RE setting non-zero power CSI-RS of OFDM symbol is answered, the corresponding position the RE symbol of the corresponding OFDM of other PRB is set Non-zero power is arranged in zero setting power CSI-RS, the corresponding position RE of the corresponding OFDM symbol of the N+1 PRB of i+1 subframe CSI-RS, and non-zero power CSI-RS is set every the corresponding OFDM symbol of next PRB of the M PRB corresponding position RE, it is other Zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of PRB, remaining subframe is successively after one PRB of rearward displacement Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of next PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, wherein i, N, M are positive integer.

6. a kind of method for obtaining channel sequence in a communications system characterized by comprising

Terminal receives the reference signal RI-RS for being used to measure channel sequence that base station is sent, wherein the frame structure of the RI-RS is matched It is set to the respective orthogonal frequency multiplexing technique OFDM symbol position the corresponding resource unit RE setting zero of part physical resource block PRB Power channel state information reference signals CSI-RS, to the corresponding OFDM symbol pair for another part PRB that the part PRB pair is answered The position the RE setting non-zero power CSI-RS answered, wherein the part PRB and another part PRB are located in same subframe；

Channel sequence is measured according to the RI-RS, and the channel sequence that measurement obtains is fed back into the base station, to be obtained by the base station Know corresponding channel capacity.

7. method as claimed in claim 6, which is characterized in that the frame structure of the RI-RS is configured to the entire band of RI-RS Non-zero power CSI-RS, the phase of other PRB is arranged in the corresponding position RE of corresponding OFDM symbol of K continuous intermediate PRB in width Answer the corresponding position the RE symbol setting zero energy CSI-RS of OFDM, wherein K is the positive integer greater than 1.

8. method as claimed in claim 6, which is characterized in that the frame structure of the RI-RS is configured to the N in each subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of a PRB, and every the corresponding of next PRB of M PRB Non-zero power CSI-RS, the corresponding position the RE symbol setting of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS, wherein N, M are positive integer.

9. the method as described in any in claim 6-8, which is characterized in that the frame structure of the RI-RS is configured in each son Frequency shift (FS) is added between frame.

10. method as claimed in claim 9, which is characterized in that the frame structure of the RI-RS is configured to i-th subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of n-th PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, and non-zero power is arranged in the corresponding position RE of the corresponding OFDM symbol of the N+1 PRB of i+1 subframe Rate CSI-RS, and non-zero power CSI-RS is set every the corresponding OFDM symbol of next PRB of the M PRB corresponding position RE, Zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of its PRB, remaining subframe is successively after one PRB of rearward displacement The corresponding OFDM symbol corresponding position RE of next PRB non-zero power CSI-RS is set, and every next PRB of M PRB The corresponding OFDM symbol corresponding position RE non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB are set Number setting zero energy CSI-RS, wherein i, N, M are positive integer.

11. a kind of base station characterized by comprising

Transmission unit, for sending the reference signal RI-RS for measuring channel sequence to terminal, with by the terminal according to reception The RI-RS measurement channel sequence arrived, and the channel sequence that measurement obtains is fed back into the base station, wherein the frame of the RI-RS Structure is configured to the position respective orthogonal frequency multiplexing technique OFDM symbol corresponding resource unit RE of part physical resource block PRB Zero power channel status information reference signal CSI-RS is set, to the corresponding OFDM for another part PRB that the part PRB pair is answered Non-zero power CSI-RS is arranged in the corresponding position RE of symbol, wherein the part PRB and another part PRB is located at same In subframe；

12. base station as claimed in claim 11, which is characterized in that the frame structure of the RI-RS is configured to the entire of RI-RS Non-zero power CSI-RS is arranged in the corresponding position RE of corresponding OFDM symbol of K continuous intermediate PRB in bandwidth, other PRB's Accordingly zero energy CSI-RS is arranged in the corresponding position the RE symbol of OFDM, wherein K is the positive integer greater than 1.

13. base station as claimed in claim 11, which is characterized in that the frame structure of the RI-RS is configured to will be in each subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of n-th PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, wherein N, M are positive integer.

14. the base station as described in any in claim 11-13, which is characterized in that the frame structure of the RI-RS is configured to each Frequency shift (FS) is added between subframe.

15. base station as claimed in claim 14, which is characterized in that the frame structure of the RI-RS is configured to i-th subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of n-th PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, and non-zero power is arranged in the corresponding position RE of the corresponding OFDM symbol of the N+1 PRB of i+1 subframe Rate CSI-RS, and non-zero power CSI-RS is set every the corresponding OFDM symbol of next PRB of the M PRB corresponding position RE, Zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of its PRB, remaining subframe is successively after one PRB of rearward displacement The corresponding OFDM symbol corresponding position RE of next PRB non-zero power CSI-RS is set, and every next PRB of M PRB The corresponding OFDM symbol corresponding position RE non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB are set Number setting zero energy CSI-RS, wherein i, N, M are positive integer.

16. a kind of terminal characterized by comprising

Receiving unit, for receiving the reference signal RI-RS for being used to measure channel sequence of base station transmission, wherein the RI-RS's The respective orthogonal frequency multiplexing technique OFDM symbol that frame structure is configured to part physical resource block PRB is resource unit RE corresponding Zero power channel status information reference signal CSI-RS is installed, it is corresponding to another part PRB that the part PRB pair is answered Non-zero power CSI-RS is arranged in the corresponding position RE of OFDM symbol, wherein the part PRB is located at another part PRB In same subframe；

The channel sequence that measurement obtains for measuring channel sequence according to the RI-RS, and is fed back to the base station by processing unit, To know corresponding channel capacity by the base station.

17. terminal as claimed in claim 16, which is characterized in that the frame structure of the RI-RS is configured to the entire of RI-RS Non-zero power CSI-RS is arranged in the corresponding position RE of corresponding OFDM symbol of K continuous intermediate PRB in bandwidth, other PRB's Accordingly zero energy CSI-RS is arranged in the corresponding position the RE symbol of OFDM, wherein K is the positive integer greater than 1.

18. terminal as claimed in claim 16, which is characterized in that the frame structure of the RI-RS is configured to will be in each subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of n-th PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, wherein N, M are positive integer.

19. the terminal as described in any in claim 16-18, which is characterized in that the frame structure of the RI-RS is configured to each Frequency shift (FS) is added between subframe.

20. terminal as claimed in claim 19, which is characterized in that the frame structure of the RI-RS is configured to i-th subframe Non-zero power CSI-RS is arranged in the corresponding position RE of the corresponding OFDM symbol of n-th PRB, and every next PRB's of M PRB Accordingly non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB is arranged in the corresponding position RE of OFDM symbol Zero energy CSI-RS is set, and non-zero power is arranged in the corresponding position RE of the corresponding OFDM symbol of the N+1 PRB of i+1 subframe Rate CSI-RS, and non-zero power CSI-RS is set every the corresponding OFDM symbol of next PRB of the M PRB corresponding position RE, Zero energy CSI-RS is arranged in the corresponding position the RE symbol of the corresponding OFDM of its PRB, remaining subframe is successively after one PRB of rearward displacement The corresponding OFDM symbol corresponding position RE of next PRB non-zero power CSI-RS is set, and every next PRB of M PRB The corresponding OFDM symbol corresponding position RE non-zero power CSI-RS, the corresponding position the RE symbol of the corresponding OFDM of other PRB are set Number setting zero energy CSI-RS, wherein i, N, M are positive integer.

21. a kind of system for obtaining channel sequence in a communications system characterized by comprising

Base station, for sending the reference signal RI-RS for measuring channel sequence to terminal, wherein the frame structure of the RI-RS is matched It is set to the respective orthogonal frequency multiplexing technique OFDM symbol position the corresponding resource unit RE setting zero of part physical resource block PRB Power channel state information reference signals CSI-RS, to the corresponding OFDM symbol pair for another part PRB that the part PRB pair is answered The position the RE setting non-zero power CSI-RS answered, and, the channel sequence of the terminal feedback is received, to know that corresponding channel holds Amount, wherein the part PRB and another part PRB are located in same subframe；

Terminal, the RI-RS sent for receiving the base station, and channel sequence is measured according to the RI-RS, and, it will survey The channel sequence measured feeds back to the base station.