CN103634084B - The method and device of optimizing pilot - Google Patents

Abstract

The present invention provides the method and device of a kind of optimizing pilot, and wherein, described method includes: for the non-PBCH frequency band of LTE system, sends out R in each of the lower on the 0th symbol of row subframe₀And R₁CRS, described R₀And R₁CRS position in the A descending sub frame be the pilot tone mapping position defined in 3GPP agreement；R₀And R₁The public guide frequency the 0th symbol in the A+1 descending sub frame on position be the R defined in standard agreement₀And R₁Pilot tone mapping position carry out the position after rotation；R is sent out in each of the lower on 1st symbol of row subframe₂And R₃CRS, based on above-mentioned principle, R is set₂And R₃CRS in B descending sub frame and the position of B+1 descending sub frame.Said method solves in prior art data solution and is in harmonious proportion channel measurement when not using CRS, the problem that overhead is unnecessary.

Description

The method and device of optimizing pilot

Technical field

The present embodiments relate to communication technology, particularly relate to the method and device of a kind of optimizing pilot.

Background technology

Big multi-protocols use public guide frequency carry out data channel demodulation, control channel demodulation, broadcast channel demodulation and Channel measurements etc., with third generation partner program (3rd Generation Partnership Project is called for short 3GPP) As a example by R10 agreement, under some transmission mode, channel state information reference signals (Channel-State Information Reference Signal, is called for short CSI-RS) as channel measurement pilot frequency, use dedicated pilot (Dedicated Reference Signal, is called for short DRS) carry out data demodulation；Now, public guide frequency (Common Reference Signal, be called for short CRS) Function is weakened, and (Physical downlink control channel is called for short only to be used for doing Physical Downlink Control Channel PDCCH) message, Physical Broadcast Channel (Physical broadcast channel is called for short PBCH) message and system message The demodulation of block (System Information Block, be called for short SIB) message, and the data demodulation performance in downlink resource without Close.

In channel variation scene more slowly (such as passback (back haul) system), if there is identical expense, then Support that (Multiple-Input Multiple-Out-put is called for short the closed loop multiple-input and multiple-output more than four data streams MIMO) transmission mode 9(TM9) best performance；When using transmission mode 9 as return system prevailing transmission pattern, number Not only data demodulation is not had help according to the CRS on symbol, and increase the expense of return system.If simple deletion CRS, then can Affect the demodulation performance of PDCCH.

Summary of the invention

In view of this, the embodiment of the present invention provides the method and device of a kind of optimizing pilot, in order to solve in prior art When data solution mediation channel measurement does not uses CRS, the problem that overhead is unnecessary.

On the one hand, the method for the optimizing pilot that the embodiment of the present invention provides, including:

For the non-PBCH frequency band of LTE system, on the 0th symbol of row subframe, send out the public affairs of port0 and port1 in each of the lower Pilot tone altogether, the public guide frequency of described port0 and port1 position in the A descending sub frame is leading defined in standard agreement Frequently mapping position；

The public guide frequency of described port0 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of port2 and port3, described port2 and port3 is sent out in each of the lower on 1st symbol of row subframe Public guide frequency position in the B descending sub frame be the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port2 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame；

Wherein, A, B take any positive integer.

On the other hand, the device of the optimizing pilot that the embodiment of the present invention provides, including:

Public guide frequency transmitting element, for the non-PBCH frequency band for LTE system, the 0th symbol of row subframe in each of the lower The public guide frequency of port0 and port1, the public guide frequency of described port0 and port1 position in the A descending sub frame is sent out on number It is set to the pilot tone mapping position defined in standard agreement；

Position arranges unit, is used for the public guide frequency making described port0 and port1 position in the A descending sub frame Pilot tone mapping position defined in standard agreement, by the public guide frequency of described port0 position in the A+1 descending sub frame It is set to the public guide frequency of port1 defined in the standard agreement pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame；

Described public guide frequency transmitting element, is additionally operable to the non-PBCH frequency band for LTE system, in each of the lower the of row subframe The public guide frequency of port2 and port3 is sent out on 1 symbol,

Described position arranges unit, is additionally operable to make the public guide frequency of described port2 and port3 in the B descending sub frame Position be the pilot tone mapping position defined in standard agreement, by the public guide frequency of described port2 in the B+1 descending sub frame Position be set to the public guide frequency of port3 defined in standard agreement pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame；

Wherein, A, B take any positive integer.

Another further aspect, the base station that the embodiment of the present invention provides, including the optimizing pilot described in any embodiment of the present invention Device.

As shown from the above technical solution, the method and device of the optimizing pilot of the embodiment of the present invention, by making LTE system The change in location of the public guide frequency of the port0 on the 0th symbol in descending sub frame adjacent in non-PBCH frequency band, the 0th symbol The change in location of public guide frequency of port2 in the public guide frequency change in location of the port1 on number, and the 1st symbol, the 1st The public guide frequency change in location of the port3 on individual symbol, and then reduce other the 2nd symbols public guide frequency to its 13 symbol, The demodulation performance making PDCCH message will not reduce, and can efficiently solve data solution mediation channel measurement in prior art and not make When using public guide frequency, the problem that overhead is unnecessary.

Accompanying drawing explanation

In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in embodiment will be made one below Introduce simply, it should be apparent that: accompanying drawings below is the accompanying drawing of some embodiments of the present invention, for ordinary skill From the point of view of personnel, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings and can realize the present invention equally Other accompanying drawing of technical scheme.

Fig. 1 is the schematic diagram of public guide frequency configuration mode of the prior art；

The schematic diagram of the public guide frequency configuration mode that Fig. 2 A provides for one embodiment of the invention；

The schematic diagram of the public guide frequency configuration mode that Fig. 2 B provides for one embodiment of the invention；

The schematic flow sheet of the method for the optimizing pilot that Fig. 3 provides for one embodiment of the invention；

The schematic flow sheet of the method for the optimizing pilot that Fig. 4 provides for one embodiment of the invention；

The structural representation of the device of the optimizing pilot that Fig. 5 provides for one embodiment of the invention.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, attached below in conjunction with in the embodiment of the present invention Figure, is clearly and completely described technical scheme.Obviously, each following embodiment is all the present invention one The embodiment of part.Based on each embodiment that the present invention is following, even if those of ordinary skill in the art do not make creativeness Work, it is also possible to by equivalent transformation technical characteristic partially or completely, and obtain and can solve the problem that the technology of the present invention problem, real The other embodiments of existing the technology of the present invention effect, and these each embodiments converting and coming are obviously without departing from presently disclosed Scope.

Currently, the CRS expense in 3GPP R10 agreement accounts for the 1/14 of whole downlink resource, now, PDCCH message, PBCH The demodulation performance of message and SIB message can be guaranteed.As it is shown in figure 1, Fig. 1 shows defined in existing 3GPP agreement The public guide frequency position in n-th descending sub frame of port0 and position (the i.e. R in figure in the N+1 descending sub frame₀ The region at place), N takes positive integer.

In FIG, R₀The CRS of CRS, the i.e. port0 configuration of presentation protocol port 0 or antenna port 0 configuration, in Fig. 1 It is illustrated that in the case of only existing a protocol port 0, the configuration mode of corresponding CRS.From figure 1 it appears that at certain Under a little transmission modes (such as transmission mode 9 or transmission mode 8), for the demodulation of PDCCH message, only use n-th descending sub frame In the 0th symbol and the 1st pilot tone corresponding to symbol, and in n-th descending sub frame the 2nd symbol to the 13rd symbol institute right Pilot tone is answered then to form unnecessary expense.

It is understood that when return network uses transmission mode 9, the data demodulation in downlink resource does not use CRS, Channel measurement also can not use CRS；Now, just become with the unrelated CRS of PDCCH message, PBCH message and SIB message demodulation Unnecessary expense.If placing CRS in the resource in addition to PDCCH symbol and PBCH frequency band, although can be by the expense of system It is reduced to minimum, but cannot remain to the estimated value of adjacent pilot frequencies, on PDCCH symbol, cause frequency domain when PDCCH channel is estimated Pilot density reduces, and demodulation performance can be severely impacted.

Fig. 2 A and Fig. 2 B respectively illustrates the schematic diagram of the public guide frequency configuration mode that one embodiment of the invention provides, wherein R₀、R₁、R₂、R₃Being expressed as the public guide frequency of protocol port 0,1,2,3 configuration, for there is protocol port 0 and agreement in Fig. 2 A In the case of port 1, according to the configuration mode schematic diagram of the public guide frequency that the method for optimizing pilot obtains, for there is agreement in Fig. 2 B In the case of port 2 and protocol port 3, public guide frequency configuration mode schematic diagram corresponding in the embodiment of the present invention.

In Fig. 2 A and Fig. 2 B, its y direction represents frequency domain, and each little represents a subcarrier, and X direction generation Table subframe, each subframe includes that the 0th symbol is to the 13rd symbol；The most each subframe includes two time slots, and each time slot includes 7 Individual symbol.

In fig. 2, according to the pilot frequency design in 3GPP agreement, interpolation or guarantor are carried out by the pilot tone before and after PDCCH symbol The pilot tone density holding operation the 0th symbol of guarantee is just to have 1 pilot tone inside the most every 3 subcarriers of 1/3(), PDCCH accords with Number precision of channel estimation and demodulation performance can ensure that.

Upper area and Fig. 1 of Fig. 2 A are carried out contrast and understand, Fig. 2 A no longer has the 2nd symbol extremely in arbitrary descending sub frame Pilot tone corresponding to 13rd symbol, and then reduce the expense of system.Further, since return path is stable, and then descending at the 1st The mutual rotation in the position of the public guide frequency of port0 and port1 in subframe, so that previous descending sub frame is (as the 0th descending Subframe) pilot estimation R₀Remain to present sub-frame (the 1st descending sub frame).Due to a upper descending sub frame R₀Frequency domain position Stagger with present sub-frame pilot tone frequency domain position, it is ensured that the pilot tone density that current PDCCH symbol is estimated is 1/3, enters And precision of channel estimation is guaranteed, PDCCH demodulation performance can be guaranteed.Especially, this is verified by emulation experiment In bright embodiment, the PDCCH demodulation performance of public guide frequency is poor relative to the PDCCH demodulation performance of the public guide frequency of LTE protocol About 0.1dB, as shown in following table one.

Being proved by the Realization of Simulation, public guide frequency takies number of resources substantially to be reduced, relative to existing LTE protocol theoretical peak Promoting about 9%, simulation result is essentially identical, and throughput gain is more apparent.

It should be noted that non-PBCH frequency band it can be understood as in Fig. 2 A and Fig. 2 B, between a good appetite suddenly appearing in a serious disease in 6 RB(figure brackets 6 RB) outside all frequency bands.

Additionally, the PBCH frequency band time domain density of the central region in Fig. 2 A, Fig. 2 B reduces 50%, owing to return path is steady Fixed, the demodulation performance of its PBCH also is able to be guaranteed.

Further, by upper strata scheduling by 6, the centre RB of SIB scheduling message to PBCH frequency band, public guide frequency is used Complete the demodulation of SIB message.

Table 1 PDCCH of the present invention demodulation performance gain

Frequency selective fading: EPA < EVA < ETU；Frequency choosing is the strongest, and the requirement to pilot tone density is the highest, and pilot tone exchanges Value more can embody.

Fig. 3 shows the schematic flow sheet of the method for the optimizing pilot that one embodiment of the invention provides；As it is shown on figure 3, this The method of the optimizing pilot in embodiment is as mentioned below.

301, for Long Term Evolution (Long Term Evolution；It is called for short: LTE) the non-PBCH frequency band of system, each Sending out the public guide frequency of port0 and port1 on 0th symbol of descending sub frame, the public guide frequency of described port0 and port1 is at A Position in individual descending sub frame is the pilot tone mapping position defined in standard agreement；

The public guide frequency of described port0 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame.

A, B in the present embodiment takes any positive integer.A, B in actual application can be identical, it is also possible to different.

It is to say, described port0(R₀) and port1(R₁) in the A+1 descending sub frame the 0th of public guide frequency Position on symbol is the position after the pilot tone mapping position of port0 and port1 defined in standard agreement carries out rotation.Such as figure The schematic diagram of the upper part in 2A.

In the present embodiment, the pilot tone mapping position defined in described standard agreement is that the pilot tone defined in 3GPP agreement is reflected Penetrate position.

302, send out the public guide frequency of port2 and port3 on the 1st symbol of row subframe in each of the lower, described port2 and The public guide frequency of port3 position in the B descending sub frame is the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port2 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame.

Wherein, A, B take any positive integer.Alternatively, the value of A with B can be identical.

Such as the schematic diagram of the top half in Fig. 2 B, port2(R₂) and port3(R₃) public guide frequency descending at A+1 The position on the 1st symbol in subframe is the R defined in standard agreement₂、R₃Pilot tone mapping position carry out the position after rotation Put；

In the present embodiment, the pilot tone mapping position defined in described standard agreement is that the pilot tone defined in 3GPP agreement is reflected Penetrate position.

It is to say, for non-PBCH frequency band, R₀、R₁、R₂、R₃Configuration mode: only the 0th of row subframe the most in each of the lower R is sent out on symbol₀And R₁Public guide frequency, R simultaneously₀And R₁Pilot tone mapping position take turns between descending even subframe and odd numbered sub-frames Change；R is sent out the most in each of the lower on 1st symbol of row subframe₂And R₃Public guide frequency, R simultaneously₂And R₃Pilot tone mapping position exist Rotation between descending even subframe and odd numbered sub-frames.

From above-described embodiment, the method for the optimizing pilot in the embodiment of the present invention, by making the non-PBC of LTE system The change in location of the public guide frequency of the port0 on the 0th symbol in descending sub frame adjacent in H frequency band, on the 0th symbol The change in location of public guide frequency of the port2 in the public guide frequency change in location of port1, and the 1st symbol, the 1st symbol On the public guide frequency change in location of port3, to reduce the public guide frequency to its 13 symbol of the 2nd symbol in each subframe, make The demodulation performance of PDCCH message will not reduce, and then solve data solution in prior art and be in harmonious proportion channel measurement and do not use public affairs Altogether during pilot tone, the problem that overhead is unnecessary.

Thus, when channel time domain fluctuation is less, kept by time domain, increase pilot tone density simultaneously, and then realize The demodulation performance of particular channel is promoted under the low-density pilot conditions of time domain.

Especially, for LTE system, under the transmission mode using dedicated pilot demodulating data, only use in above-mentioned reality Execute the pilot frequency configuration scheme in example, the throughput of return system can be promoted, ensure that the demodulation performance of PDCCH.

Alternatively, in the schematic flow sheet of the method for the optimizing pilot shown in Fig. 4, the optimizing pilot in the present embodiment Method may also include the steps 303 and step 304:

303, for the PBCH frequency band of LTE system, port0 is all sent out on the 0th of row subframe and the 7th symbol in each of the lower With the public guide frequency of port1, the public guide frequency of described port0 and port1 position in the A descending sub frame is standard agreement Defined in pilot tone mapping position,

The public guide frequency of described port0 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame.

With reference to shown in the central region of Fig. 2 A, an only R on the 0th of row subframe and the 7th symbol the most in each of the lower₀And R₁'s Public guide frequency, simultaneously R₀And R₁The rotation between descending even subframe and odd numbered sub-frames of pilot tone mapping position.

In the present embodiment, the pilot tone mapping position defined in described standard agreement is that the pilot tone defined in 3GPP agreement is reflected Penetrate position.

304, the public guide frequency of port2 and port3 is all sent out in each of the lower on the 1st of row subframe and the 8th symbol, described The public guide frequency of port2 and port3 position in the B descending sub frame is the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port2 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame.

With reference to shown in the central region of Fig. 2 B, an only R on the 1st of row subframe and the 8th symbol the most in each of the lower₂And R₃'s Public guide frequency, simultaneously R₂And R₃The rotation between descending even subframe and odd numbered sub-frames of pilot tone mapping position.

It is to say, described R₂And R₃The public guide frequency the 1st symbol in the B+1 descending sub frame on position be R defined in standard agreement₂And R₃Pilot tone mapping position rotation after position；Described R₂And R₃Public guide frequency at A+1 The position on the 8th symbol in descending sub frame is the R defined in standard agreement₂And R₃Pilot tone mapping position rotation after position Put.

In the present embodiment, the pilot tone mapping position defined in described standard agreement is that the pilot tone defined in 3GPP agreement is reflected Penetrate position.

It addition, reality application LTE system in, base station can according to formula below (1) obtain port0, port1, The public guide frequency of port2, port3 position in descending sub frame.

$a_{k,l}^{\left(p\right)}=r_{l,n_s}\left(m^{\&prime;}\right)---\left(1\right)$

Wherein,Representing pilot frequency sequence, p represents port0, port1, port2 or port3, n_sRepresent time slot；

$n_s=\left\{\begin{array}{cc}\mathrm{0,1}& \mathrm{if}{N}_{\mathrm{RB}}^{\mathrm{DL}}-6\&le;m<N_{\mathrm{RB}}^{\mathrm{DL}}+6\\ 0& \mathrm{ifm}<N_{\mathrm{RB}}^{\mathrm{DL}}-6\mathrm{orm}\&GreaterEqual;N_{\mathrm{RB}}^{\mathrm{DL}}+6\end{array}\right.$

k=6m+(v+v_shift)mod6

$l=\left\{\begin{array}{cc}0& \mathrm{ifp}\&Element;\left\{\mathrm{0,1}\right\}\\ 1& \mathrm{ifp}\&Element;\left\{\mathrm{2,3}\right\}\end{array}\right.$

$m=\mathrm{0,1},...,2\&CenterDot;N_{\mathrm{RB}}^{\mathrm{DL}}-1$

$m^{\&prime;}=m+N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-N_{\mathrm{RB}}^{\mathrm{DL}}$

$v=\left\{\begin{array}{cc}0& \mathrm{ifp}=0\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 3& \mathrm{ifp}=0\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3& \mathrm{ifp}=1\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 0& \mathrm{ifp}=1\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=2\mathrm{andf}\mathrm{mod}2=0\\ 3+3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=3\mathrm{andf}\mathrm{mod}2=1\end{array}\right.$

$v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$

V and v_shiftRepresenting the frequency domain position of different frequency pilot sign, f represents the index of descending sub frame number.

From above-described embodiment, the method for the optimizing pilot in the embodiment of the present invention, solve data in prior art When solution mediation channel measurement does not uses CRS, the problem that overhead is unnecessary.

Further, when channel time domain fluctuation is less, kept by time domain, increase pilot tone density simultaneously, and then Realize promoting the demodulation performance of particular channel under the low-density pilot conditions of time domain.

Especially, for LTE system, under the transmission mode using dedicated pilot demodulating data, only use in above-mentioned reality Execute the pilot frequency configuration scheme in example, the throughput of return system can be promoted, ensure that the demodulation performance of PDCCH.

Fig. 5 shows the structural representation of the device of the optimizing pilot that one embodiment of the invention provides；As it is shown in figure 5, this The device of the optimizing pilot in embodiment includes: public guide frequency transmitting element 51 and position arrange unit 52；

Wherein, public guide frequency transmitting element 51 for the non-PBCH frequency band for LTE system, the of row subframe in each of the lower Sending out the public guide frequency of protocol port port0 and port1 on 0 symbol, the public guide frequency of described port0 and port1 is under A Position in row subframe is the pilot tone mapping position defined in standard agreement；

Position arranges unit 52 for the position making the public guide frequency of described port0 and port1 in the A descending sub frame Pilot tone mapping position defined in standard agreement, by the public guide frequency of described port0 position in the A+1 descending sub frame It is set to the public guide frequency of port1 defined in the standard agreement pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame；

Public guide frequency transmitting element 51 is additionally operable to the non-PBCH frequency band for LTE system, in each of the lower the 1st of row subframe The public guide frequency of port2 and port3 is sent out on symbol,

Position arranges unit 52 and is additionally operable to the public guide frequency making described port2 and port3 position in the B descending sub frame It is set to the pilot tone mapping position defined in standard agreement, by the public guide frequency of described port2 position in the B+1 descending sub frame Install the public guide frequency of port3 defined in for the standard agreement pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame；

Wherein, A, B take any positive integer.A, B in actual application can be identical, it is also possible to different.

Further, in another preferred application scenarios, public guide frequency transmitting element 51 is additionally operable to for LTE system PBCH frequency band, all sends out the public guide frequency of port0 and port1 in each of the lower on the 0th of row subframe and the 7th symbol,

Position arranges unit 52 and is additionally operable to the public guide frequency making described port0 and port1 position in the A descending sub frame It is set to the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port0 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port1 position in the A+1 descending sub frame is set to defined in standard agreement The public guide frequency of port0 pilot tone mapping position in the A+1 descending sub frame；

Public guide frequency transmitting element 51 is additionally operable to the PBCH frequency band for LTE system, in each of the lower the 1st of row subframe and The public guide frequency of port2 and port3 is all sent out on 8th symbol,

Position arranges unit 52 and is additionally operable to the public guide frequency making described port2 and port3 position in the B descending sub frame It is set to the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port2 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port3 position in the B+1 descending sub frame is set to defined in standard agreement The public guide frequency of port2 pilot tone mapping position in the B+1 descending sub frame.

In actual applications, aforesaid position arrange unit 52 can specifically for according to formula below (1) arrange The public guide frequency of port0, port1, port2, port3 positional information in descending sub frame；

$a_{k,l}^{\left(p\right)}=r_{l,n_s}\left(m^{\&prime;}\right)---\left(1\right)$

Wherein,Representing pilot frequency sequence, p represents port0, port1, port2 or port3, n_sRepresent time slot；

$n_s=\left\{\begin{array}{cc}\mathrm{0,1}& \mathrm{if}{N}_{\mathrm{RB}}^{\mathrm{DL}}-6\&le;m<N_{\mathrm{RB}}^{\mathrm{DL}}+6\\ 0& \mathrm{ifm}<N_{\mathrm{RB}}^{\mathrm{DL}}-6\mathrm{orm}\&GreaterEqual;N_{\mathrm{RB}}^{\mathrm{DL}}+6\end{array}\right.$

k=6m+(v+v_shift)mod6

$l=\left\{\begin{array}{cc}0& \mathrm{ifp}\&Element;\left\{\mathrm{0,1}\right\}\\ 1& \mathrm{ifp}\&Element;\left\{\mathrm{2,3}\right\}\end{array}\right.$

$m=\mathrm{0,1},...,2\&CenterDot;N_{\mathrm{RB}}^{\mathrm{DL}}-1$

$m^{\&prime;}=m+N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-N_{\mathrm{RB}}^{\mathrm{DL}}$

$v=\left\{\begin{array}{cc}0& \mathrm{ifp}=0\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 3& \mathrm{ifp}=0\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3& \mathrm{ifp}=1\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 0& \mathrm{ifp}=1\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=2\mathrm{andf}\mathrm{mod}2=0\\ 3+3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=3\mathrm{andf}\mathrm{mod}2=1\end{array}\right.$

$v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$

V and v_shiftRepresenting the frequency domain position of different frequency pilot sign, f represents the index of descending sub frame number.

The device of above-mentioned optimizing pilot can solve the problem that when in prior art, data solution mediation channel measurement does not uses CRS, The problem that overhead is unnecessary.

In another embodiment, the device of optimizing pilot includes: processor and memorizer；Wherein, processor is used for performing Aforesaid public guide frequency transmitting element 51 and position arrange the function of unit 52.

For example, processor is useful for the non-PBCH frequency band of LTE system, in each of the lower the 0th symbol of row subframe Send out the public guide frequency of port0 and port1 on number, on the 1st symbol of row subframe, send out the public of port2 and port3 in each of the lower Pilot tone；

Preferably, for the PBCH frequency band of LTE system, all send out on the 0th of row subframe and the 7th symbol in each of the lower The public guide frequency of port0 and port1, all sends out the public affairs of port2 and port3 in each of the lower on the 1st of row subframe and the 8th symbol Pilot tone altogether.

Specifically, processor can arrange the public guide frequency of port0, port1, port2, port3 according to formula below (1) Positional information in descending sub frame；

$a_{k,l}^{\left(p\right)}=r_{l,n_s}\left(m^{\&prime;}\right)---\left(1\right)$

Wherein,Representing pilot frequency sequence, p represents port0, port1, port2 or port3, n_sRepresent time slot；

$n_s=\left\{\begin{array}{cc}\mathrm{0,1}& \mathrm{if}{N}_{\mathrm{RB}}^{\mathrm{DL}}-6\&le;m<N_{\mathrm{RB}}^{\mathrm{DL}}+6\\ 0& \mathrm{ifm}<N_{\mathrm{RB}}^{\mathrm{DL}}-6\mathrm{orm}\&GreaterEqual;N_{\mathrm{RB}}^{\mathrm{DL}}+6\end{array}\right.$

k=6m+(v+v_shift)mod6

$l=\left\{\begin{array}{cc}0& \mathrm{ifp}\&Element;\left\{\mathrm{0,1}\right\}\\ 1& \mathrm{ifp}\&Element;\left\{\mathrm{2,3}\right\}\end{array}\right.$

$m=\mathrm{0,1},...,2\&CenterDot;N_{\mathrm{RB}}^{\mathrm{DL}}-1$

$m^{\&prime;}=m+N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-N_{\mathrm{RB}}^{\mathrm{DL}}$

$v=\left\{\begin{array}{cc}0& \mathrm{ifp}=0\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 3& \mathrm{ifp}=0\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3& \mathrm{ifp}=1\mathrm{andl}=0\mathrm{andf}\mathrm{mod}2=0\\ 0& \mathrm{ifp}=1\mathrm{andl}\&NotEqual;0\mathrm{andf}\mathrm{mod}2=1\\ 3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=2\mathrm{andf}\mathrm{mod}2=0\\ 3+3\left(n_s\mathrm{mod}2\right)& \mathrm{ifp}=3\mathrm{andf}\mathrm{mod}2=1\end{array}\right.$

$v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$

V and v_shiftRepresenting the frequency domain position of different frequency pilot sign, f represents the index of descending sub frame number.

Memorizer in the present embodiment is for storing the information of the pilot tone mapping position defined in standard agreement, described standard Pilot tone mapping position defined in agreement is the pilot tone mapping position defined in third generation partner program 3GPP agreement.

According to a further aspect in the invention, the present invention also provides for a kind of base station, and this base station includes any embodiment of the present invention The device of described optimizing pilot.Thus in return network, base station can arrange the band of pre-transmission according to the device of optimizing pilot The configuration mode of the pilot tone of alleviating distention in middle-JIAO.

One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each method embodiment can be led to The hardware crossing programmed instruction relevant completes.Aforesaid program can be stored in a computer read/write memory medium.This journey Sequence upon execution, performs to include the step of above-mentioned each method embodiment；And aforesaid storage medium includes: ROM, RAM, magnetic disc or The various media that can store program code such as person's CD.

Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology The scope of scheme.

Claims (7)

1. the method for an optimizing pilot, it is characterised in that including:

For the non-physical broadcast channel PBCH frequency band of Long Term Evolution LTE system, send out on the 0th symbol of row subframe in each of the lower The public guide frequency of protocol port port 0 and port 1, the public guide frequency of described port 0 and port 1 is at the A descending sub frame In position be the pilot tone mapping position defined in standard agreement；

The public guide frequency of described port 0 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port 1 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 0 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of port 2 and port 3, described port 2 and port 3 is sent out in each of the lower on 1st symbol of row subframe Public guide frequency position in the B descending sub frame be the pilot tone mapping position defined in standard agreement；

The public guide frequency of described port 2 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port 3 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 2 pilot tone mapping position in the B+1 descending sub frame；

Wherein, A, B take any positive integer；

Also include:

For the PBCH frequency band of LTE system, all send out port 0 and port on the 0th of row subframe and the 7th symbol in each of the lower The public guide frequency of 1, the public guide frequency of described port 0 and port 1 position in the A descending sub frame is fixed in standard agreement The pilot tone mapping position of justice,

The public guide frequency of described port 0 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port 1 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 0 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of port 2 and port 3, described port 2 is all sent out in each of the lower on the 1st of row subframe and the 8th symbol It is the pilot tone mapping position defined in standard agreement with the public guide frequency of port 3 position in the B descending sub frame,

The public guide frequency of described port 2 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port 3 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 2 pilot tone mapping position in the B+1 descending sub frame.

Method the most according to claim 1, it is characterised in that the pilot tone mapping position defined in described standard agreement is Pilot tone mapping position defined in third generation partnership project 3GPP agreement.

Method the most according to claim 1, it is characterised in that in described LTE system, port0, port 1, port 2, The public guide frequency of port 3 position in descending sub frame can use formula below to represent:

$a_{k,l}^{\left(p\right)}=r_{l,n_s}\left(m^{\&prime;}\right)$

Wherein,Representing pilot frequency sequence, p represents port 0, port 1, port 2 or port 3, n_sRepresent time slot；

K=6m+ (v+v_shift)mod6

$l=\left\{\begin{array}{cc}0& ifp\&Element;\{0,1\}\\ 1& ifp\&Element;\{2,3\}\end{array}\right.$

$m=0,1,...,2\&CenterDot;N_{RB}^{DL}-1$

$m^{\&prime;}=m+N_{RB}^{\max ,DL}-N_{RB}^{DL}$

$v=\left\{\begin{array}{cc}0& ifp=0andl=0andf\mathrm{mod}2=0\\ 3& ifp=0andl\&NotEqual;0andf\mathrm{mod}2=1\\ 3& ifp=1andl=0andf\mathrm{mod}2=0\\ 0& ifp=1andl\&NotEqual;0andf\mathrm{mod}2=1\\ 3\left(n_s\mathrm{mod}2\right)& ifp=2andf\mathrm{mod}2=0\\ 3+3\left(n_s\mathrm{mod}2\right)& ifp=3andf\mathrm{mod}2=1\end{array}\right.$

$v_{shift}=N_{ID}^{cell}\mathrm{mod}6$

V and v_shiftRepresenting the frequency domain position of different frequency pilot sign, f represents the index of descending sub frame number.

4. the device of an optimizing pilot, it is characterised in that including:

Public guide frequency transmitting element, for the non-physical broadcast channel PBCH frequency band for Long Term Evolution LTE system, in each of the lower The public guide frequency of protocol port port 0 and port 1, the public affairs of described port 0 and port 1 are sent out on 0th symbol of row subframe Pilot tone position in the A descending sub frame is the pilot tone mapping position defined in standard agreement altogether；

Position arranges unit, is used for the public guide frequency making described port 0 and port 1 position in the A descending sub frame and is Pilot tone mapping position defined in standard agreement, by the public guide frequency of described port 0 position in the A+1 descending sub frame It is set to the public guide frequency of port 1 defined in the standard agreement pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port 1 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 0 pilot tone mapping position in the A+1 descending sub frame；

Described public guide frequency transmitting element, is additionally operable to the non-PBCH frequency band for LTE system, in each of the lower the 1st of row subframe The public guide frequency of port 2 and port 3 is sent out on symbol；

Described position arranges unit, is additionally operable to make the public guide frequency of described port 2 and port 3 in the B descending sub frame Position is the pilot tone mapping position defined in standard agreement, by the public guide frequency of described port 2 in the B+1 descending sub frame Position be set to the public guide frequency of port 3 defined in standard agreement pilot tone mapped bits in the B+1 descending sub frame Put；

The public guide frequency of described port 3 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 2 pilot tone mapping position in the B+1 descending sub frame；

Wherein, A, B take any positive integer；

Described public guide frequency transmitting element, is additionally operable to the PBCH frequency band for LTE system, in each of the lower the 0th of row subframe and The public guide frequency of port 0 and port 1 is all sent out on 7th symbol,

Described position arranges unit, is additionally operable to make the public guide frequency of described port 0 and port 1 in the A descending sub frame Position is the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port 0 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 1 pilot tone mapping position in the A+1 descending sub frame；

The public guide frequency of described port 1 position in the A+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 0 pilot tone mapping position in the A+1 descending sub frame；

Described public guide frequency transmitting element, is additionally operable to the PBCH frequency band for LTE system, in each of the lower the 1st of row subframe and The public guide frequency of port 2 and port 3 is all sent out on 8th symbol,

Described position arranges unit, is additionally operable to make the public guide frequency of described port 2 and port 3 in the B descending sub frame Position is the pilot tone mapping position defined in standard agreement,

The public guide frequency of described port 2 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 3 pilot tone mapping position in the B+1 descending sub frame；

The public guide frequency of described port 3 position in the B+1 descending sub frame is set to the port defined in standard agreement The public guide frequency of 2 pilot tone mapping position in the B+1 descending sub frame.

Device the most according to claim 4, it is characterised in that also include:

Memorizer, for storing the information of the pilot tone mapping position defined in standard agreement, leading defined in described standard agreement Frequently mapping position is the pilot tone mapping position defined in third generation partner program 3GPP agreement.

Device the most according to claim 4, it is characterised in that described position arranges unit, specifically for according to following Formula arranges the public guide frequency positional information in descending sub frame of port 0, port 1, port 2, port 3；

$a_{k,l}^{\left(p\right)}=r_{l,n_s}\left(m^{\&prime;}\right)$

Wherein,Representing pilot frequency sequence, p represents port 0, port 1, port 2 or port 3, n_sRepresent time slot；

K=6m+ (v+v_shift)mod6

$l=\left\{\begin{array}{cc}0& ifp\&Element;\{0,1\}\\ 1& ifp\&Element;\{2,3\}\end{array}\right.$

$m=0,1,...,2\&CenterDot;N_{RB}^{DL}-1$

$m^{\&prime;}=m+N_{RB}^{\max ,DL}-N_{RB}^{DL}$

$v=\left\{\begin{array}{cc}0& ifp=0andl=0andf\mathrm{mod}2=0\\ 3& ifp=0andl\&NotEqual;0andf\mathrm{mod}2=1\\ 3& ifp=1andl=0andf\mathrm{mod}2=0\\ 0& ifp=1andl\&NotEqual;0andf\mathrm{mod}2=1\\ 3\left(n_s\mathrm{mod}2\right)& ifp=2andf\mathrm{mod}2=0\\ 3+3\left(n_s\mathrm{mod}2\right)& ifp=3andf\mathrm{mod}2=1\end{array}\right.$

$v_{shift}=N_{ID}^{cell}\mathrm{mod}6$

V and v_shiftRepresenting the frequency domain position of different frequency pilot sign, f represents the index of descending sub frame number.

7. a base station, it is characterised in that include the device of the as above arbitrary described optimizing pilot of claim 4 to 6.