CN101610231B - Method and device for realizing frequency hopping - Google Patents

Abstract

The invention discloses a frequency hopping realizing method which comprises the following steps: for each descending special pilot frequency, determining a frequency hopping offset corresponding to the descending special pilot frequency according to a cell mark of the descending special pilot frequency; determining frequency domain positions of the descending special pilot frequencies in a physical block of the descending special pilot frequencies according to the frequency hopping offsets of the descending special pilot frequencies and opposite frequency domain positions thereof, and maintaining the opposite positions and the number of the pilot frequencies of the descending special pilot frequencies in the physical resource block; and for the descending special pilot frequencies, carrying out the resource mapping of the whole frequency domain according to the determined frequency domain positions. The invention also discloses a frequency hopping realizing device. The invention reduces interferences among the descending special pilot frequencies and improves the channel estimation performance of the descending special pilot frequencies.

Description

Implementing method for frequency-hopping and device

Technical field

The present invention relates to the communications field, relate in particular to a kind of implementing method for frequency-hopping and device.

Background technology

At Long Term Evolution (Long Term Evolution, referred to as LTE) in system, descending special pilot frequency is used at high level user terminal (User Terminal, referred to as UE) during semi-static configuration, the phase reference that downlink data shared channel (Physical downlink sharedchannel is called for short PDSCH) is carried out to demodulation.Descending special pilot frequency is sent by antenna port 5, and it is mainly the downlink reference signal that wave beam forms, the downlink reference signal of specific precoding, and the scene of parallel load.

The third generation mobile partner plans (3rd Generation Partnership Project, referred to as 3GPP) in determined normal cyclic prefix (Normal Cyclic Prefix, referred to as normal CP) frame structure, Fig. 1 shows the structural framing figure of descending special pilot frequency in normal CP frame structure, wherein

Normal?cyclic?prefix：

$a_{k,l}^{\left(p\right)}=r(3\·l^{\′}\·N_{\mathrm{RB}}^{\mathrm{PDSCH}}+m^{\′})$

$k=\left(k^{\′}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$

$k^{\′}=\left\{\begin{array}{ccc}{4m}^{\′}& \mathrm{if}& l\∈\left\{\mathrm{2,3}\right\}\\ {4m}^{\′}+2& \mathrm{if}& l\∈\left\{\mathrm{5,6}\right\}\end{array}\right.$

Where $l=\left\{\begin{array}{cc}3& l^{\′}=0\\ 6& l^{\′}=1\\ 2& l^{\′}=2\\ 5& l^{\′}=3\end{array}\right.$

$l^{\′}=\left\{\begin{array}{ccc}\mathrm{0,1}& \mathrm{if}& n_s\mathrm{mod}2=0\\ \mathrm{2,3}& \mathrm{if}& n_s\mathrm{mod}2=1\end{array}\right.$

$m^{\′}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1$

Wherein, a _{k, l} ^(p)mean descending special pilot frequency a, k is the mapping position of dedicated pilot at the upper frequency domain of Physical Resource Block (Resource Block, referred to as RB) of PDSCH distribution, the mapping position that l is dedicated pilot time domain on the RB of PDSCH distribution; L ', k ' and m are intermediate variable, and ns is a time slot, and p is antenna port 5.N _rB ^pDSCHthe number of the Physical Resource Block that distributes on the PDSCH channel of this UE, N _sc ^rBbe the number of the subcarrier that comprises of each minimal physical Resource Block, in LTE Standard Edition 3GPP TS 36.211 v8.2.0, this value is 12, and each Physical Resource Block comprises 12 subcarriers.N ^pRBon the whole bandwidth of PDSCH channel, the sequence number of the Physical Resource Block that this UE distributes.

According to above-mentioned formula, can find out, on the RB that descending special pilot frequency distributes at PDSCH, frequency domain position is fixed relatively, when the beam direction of two neighbor cells point-blank the time, in the situation that the frequency domain position of dedicated pilot is identical, can produce larger peak power to Cell Edge User, increase the interference between different districts UE, can produce larger interference to the descending special pilot frequency between neighbor cell especially, had a strong impact on the channel estimating performance of data channel.

Summary of the invention

While considering that the beam direction when two neighbor cells that exists in correlation technique point-blank, increase the different districts terminal room interference problem and the present invention is proposed, for this reason, main purpose of the present invention is to provide a kind of implementing method for frequency-hopping and device, to address the above problem.

According to an aspect of the present invention, provide a kind of implementing method for frequency-hopping.

According to the implementing method for frequency-hopping of the embodiment of the present invention, comprise: for each descending special pilot frequency, according to its residing cell ID, determine the frequency hopping side-play amount that descending special pilot frequency is corresponding; According to frequency hopping side-play amount and the residing relative frequency domain position thereof of descending special pilot frequency, determine descending special pilot frequency frequency domain position in Physical Resource Block under it; For descending special pilot frequency, according to definite frequency domain position, carry out the resource mapping on whole frequency domain.

Wherein, for relative frequency domain position and frequency hopping side-play amount and descending special pilot frequency that be greater than the sub-carrier number that this mobile terminal frequency domain distributes, the frequency domain position of determining descending special pilot frequency is specially: the sub-carrier number that the relative frequency domain position of descending special pilot frequency and frequency hopping side-play amount sum comprise each Resource Block carries out resulting frequency domain position after delivery, (k '+v _shift) modN _sc ^rB, wherein, the relative frequency domain position of k ' expression descending special pilot frequency, N _sc ^rBthe number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is the corresponding frequency hopping side-play amount of this descending special pilot frequency.

Preferably, in the normal cyclic prefix frame structure, according to the residing cell ID of each descending special pilot frequency, determine that the frequency hopping side-play amount that descending special pilot frequency is corresponding is specially: the frequency hopping side-play amount of descending special pilot frequency $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4$ , or, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$ , wherein, N _iD ^cellthe ID that means community.Can also make in addition $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}4$ , n=1 or 2 or 3, or $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}6$ , n=1 or 2 or 3,4,5.

The resource mapping carried out on whole frequency domain according to definite frequency domain position is specially: according to definite frequency domain position, determine the frequency domain position k of descending special pilot frequency at whole frequency domain: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , wherein, (k '+v _shift) modN _sc ^rBthe frequency domain position of this descending special pilot frequency in the Physical Resource Block for its distribution, n ^pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

According to a further aspect in the invention, provide a kind of frequency hopping realizing device.

Frequency hopping realizing device comprises according to an embodiment of the invention: the side-play amount determination module, for according to the residing cell ID of each descending special pilot frequency, determine the frequency hopping side-play amount that descending special pilot frequency is corresponding; The primary importance determination module, for the frequency hopping side-play amount according to descending special pilot frequency and residing relative frequency domain position thereof, determine descending special pilot frequency frequency domain position in Physical Resource Block under it; Mapping block carries out resource mapping on whole frequency domain for the frequency domain position definite to descending special pilot frequency.

Preferably, the side-play amount determination module is specifically in the normal cyclic prefix frame structure, according to formula $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4$ , or, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$ Determine the frequency hopping side-play amount of descending special pilot frequency, wherein, N _iD ^cellthe ID that means community.Can also make in addition $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}4$ , wherein, n=1 or 2 or 3, or $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}6,$ Wherein, n=1 or 2 or 3,4,5.

Wherein, the primary importance determination module specifically for: for relative frequency domain position and frequency hopping side-play amount and be greater than the descending special pilot frequency of frequency domain institute allocation of subcarriers number, the sub-carrier number that the relative frequency domain position of descending special pilot frequency and frequency hopping side-play amount sum are comprised each Resource Block carries out resulting frequency domain position after delivery, (k '+v _shift) modN _sc ^rB, wherein, the relative frequency domain position of k ' expression descending special pilot frequency, N _sc ^rBthe number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is the corresponding frequency hopping side-play amount of this descending special pilot frequency.

Preferably, device also comprises second place determination module, for the frequency domain position according to definite, determines the frequency domain position k of descending special pilot frequency at whole frequency domain: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , wherein, (k '+v _shift) modN _sc ^rBthe frequency domain position of descending special pilot frequency in the Physical Resource Block for its distribution, n ^pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

By above-mentioned at least one technical scheme of the present invention, reduced the interference between the descending special pilot frequency of neighbor cell, improved the channel estimating performance of descending special pilot frequency.

The accompanying drawing explanation

Accompanying drawing is used to provide a further understanding of the present invention, and forms the part of specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:

Fig. 1 is the mapping pattern schematic diagram according to the minimal physical Resource Block of the descending special pilot frequency of correlation technique;

Fig. 2 is the flow chart according to the implementing method for frequency-hopping of the inventive method embodiment;

Fig. 3 is the detailed process chart according to the embodiment mono-of the inventive method implementing method for frequency-hopping;

Fig. 4 is the detailed process chart according to the embodiment bis-of the inventive method implementing method for frequency-hopping;

Fig. 5 is the schematic diagram according to the frequency hopping realizing device of the inventive method embodiment.

Embodiment

Describe the present invention in detail below in conjunction with accompanying drawing.

Embodiment of the method

For reducing the interference between different districts UE, for dedicated pilot obtains Frequency Hopping Processing Gain, therefore a kind of frequency-hopping method of dedicated pilot is proposed in the present invention simultaneously.

According to the embodiment of the present invention, provide a kind of implementing method for frequency-hopping.

Fig. 2 is the flow chart according to the implementing method for frequency-hopping of the embodiment of the present invention, and as shown in Figure 2, the method comprises the following steps:

Step S202, for each descending special pilot frequency, according to its residing cell ID, determine the frequency hopping side-play amount that descending special pilot frequency is corresponding;

Step S204, frequency hopping side-play amount and residing relative frequency domain position thereof according to descending special pilot frequency, determine descending special pilot frequency frequency domain position in Physical Resource Block (RB) under it, and keep relative position and the pilot tone number of the descending special pilot frequency in RB constant;

Step S206, for descending special pilot frequency, carry out the resource mapping on whole frequency domain according to definite frequency domain position.

The technical scheme provided by the embodiment of the present invention, reduced the interference between the descending special pilot frequency of neighbor cell, improved the channel estimating performance of descending special pilot frequency.

Wherein, in step S202, in the normal cyclic prefix frame structure, according to the residing cell ID of each descending special pilot frequency, determine that the frequency hopping side-play amount formula that descending special pilot frequency is corresponding is specially: the frequency hopping side-play amount of descending special pilot frequency $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4$ , or, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$ , wherein, N _iD ^cellthe ID that means community.Can also make in addition $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}4$ , wherein, n=1 or 2 or 3, or $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}6,$ Wherein, n=1 or 2 or 3,4,5.

Wherein, in step S204, for relative frequency domain position and frequency hopping side-play amount and descending special pilot frequency that be greater than frequency domain institute allocation of subcarriers number, the frequency domain position of this descending special pilot frequency is: the relative frequency domain position of row dedicated pilot and sub-carrier number that frequency hopping side-play amount sum comprises each Resource Block carry out resulting frequency domain position after delivery, (k '+v _shift) modN _sc ^rB, wherein, k ' means the relative frequency domain position of this descending special pilot frequency, N _sc ^rBthe number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is the frequency hopping side-play amount that this descending special pilot frequency is corresponding.

Wherein, in step S206, carry out resource mapping according to definite frequency domain position and be specially: according to definite frequency domain position, determine the frequency domain position k of descending special pilot frequency at whole frequency domain: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , wherein, (k '+v _shift) modN _sc ^rBthe frequency domain position of descending special pilot frequency in the Physical Resource Block for its distribution, n ^pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

Embodiment mono-

Fig. 3 is the detailed process chart according to the implementing method for frequency-hopping of the inventive method embodiment, and as shown in Figure 3, the method comprises the following steps:

Step S302, the high-rise notification terminal (UE) of base station is used descending special pilot frequency;

Step S304, base station according to the pattern of 3GPP TS 36.211 regulations, is shone upon on the descending RB that descending special pilot frequency is distributed at this UE when downlink data sends;

Step S306, determine the frequency hopping side-play amount vshift of descending special pilot frequency, wherein, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4$ , wherein, N _iD ^cellmean No. ID of descending special pilot frequency affiliated subdistrict, the frequency domain position of this descending special pilot frequency in its residing RB is k '+v _shift, i.e. k '+N _iD ^cellmod4, wherein, the relative frequency domain position that k ' is this descending special pilot frequency;

Step S308, for k '+v _shiftbe greater than the descending special pilot frequency of frequency domain institute allocation of subcarriers number, frequency domain position in its residing RB is specially: the sub-carrier number that the relative frequency domain position of descending special pilot frequency and frequency hopping side-play amount sum are comprised each Resource Block carries out the resulting frequency domain position of delivery, (k '+v _shift) modN _sc ^rB; Step S310, determine the frequency domain position k of descending special pilot frequency at whole frequency domain according to the frequency domain position of descending special pilot frequency: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , and the descending special pilot frequency on each OFDM symbol is carried out to resource mapping, complete the frequency hopping of dedicated pilot,

$k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$

$k^{\′}=\left\{\begin{array}{ccc}{4m}^{}& \mathrm{if}& l\∈\left\{\mathrm{2,3}\right\}\mathrm{and\; normal\; cyclic\; prefix}\\ {4m}^{}+2& \mathrm{if}& l\∈\left\{\mathrm{5,6}\right\}\mathrm{and\; normal\; cyclic\; prefix}\end{array}\right.$

Wherein, $l=\left\{\begin{array}{cc}3& l^{\′}=0\\ 6& l^{\′}=1\\ 2& l^{\′}=2\\ 5& l^{\′}=3\end{array}\right.$

$l^{\′}=\left\{\begin{array}{ccc}\mathrm{0,1}& \mathrm{if}& n_s\mathrm{mod}2=0\mathrm{and\; normal\; cyclic\; prefix}\\ \mathrm{2,3}& \mathrm{if}& n_s\mathrm{mod}2=1\mathrm{and\; normal\; cyclic\; prefix}\end{array}\right.$

$m=\mathrm{0,1},..,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1$

Embodiment bis-

Fig. 4 is the detailed process chart according to the implementing method for frequency-hopping of the inventive method embodiment, and as shown in Figure 4, the method comprises the following steps:

Step S402, the high-rise notification terminal (UE) of base station is used descending special pilot frequency;

Step S404, base station according to the pattern of 3GPP TS 36.211 regulations, is shone upon on the descending RB that descending special pilot frequency is distributed at this UE when downlink data sends;

Step S406, determine the frequency hopping side-play amount v of descending special pilot frequency _shift, wherein, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$ , wherein, N _iD ^cellmean No. ID of descending special pilot frequency affiliated subdistrict, the frequency domain position of this descending special pilot frequency in its residing RB is k '+v _shift, i.e. k '+N _iD ^cellmod 6, wherein, and the relative frequency domain position that k ' is this descending special pilot frequency;

Step S408, for k '+v _shiftbe greater than the descending special pilot frequency of UE sub-carrier number that frequency domain is assigned with, frequency domain position in its residing RB is specially: the sub-carrier number that the relative frequency domain position of descending special pilot frequency and frequency hopping side-play amount sum are comprised each Resource Block carries out the resulting frequency domain position of delivery, (k '+v _shift) modN _sc ^rB;

Step S410, determine the frequency domain position k of descending special pilot frequency at whole frequency domain according to the frequency domain position of descending special pilot frequency: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , and the descending special pilot frequency on each OFDM symbol is carried out to resource mapping, complete the frequency hopping of dedicated pilot, wherein,

$k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$

$k^{\′}=\left\{\begin{array}{cc}4m& \mathrm{if\; l}\∈\left\{\mathrm{2,3}\right\}\mathrm{and\; normal\; cyclic\; prefix}\\ 4m+2& \mathrm{if\; l}\∈\left\{\mathrm{5,6}\right\}\mathrm{and\; normal\; cyclic\; prefix}\end{array}\right.$

$l=\left\{\begin{array}{cc}3& l^{\′}=0\\ 6& l^{\′}=1\\ 2& l^{\′}=2\\ 5& l^{\′}=3\end{array}\right.$

$l^{\′}=\left\{\begin{array}{ccc}\mathrm{0,1}& \mathrm{if}& n_s\mathrm{mod}2=0\mathrm{and\; normal\; cyclic\; prefix}\\ \mathrm{2,3}& \mathrm{if}& n_s\mathrm{mod}2=1\mathrm{and\; normal\; cyclic\; prefix}\end{array}\right.$

$m=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1$

According to above implementation step, the descending special pilot frequency of having guaranteed neighbor cell does not send at the same position of frequency domain, and can not bump between descending special pilot frequency and four road public guide frequencies, guaranteed the pilot tone number before and after the descending special pilot frequency frequency hopping in descending the distributed RB of UE, and time domain interval and the frequency domain interval of descending special pilot frequency remain unchanged.

Device embodiment

Fig. 5 shows the frequency hopping realizing device schematic diagram according to the embodiment of the present invention, and this device comprises:

Side-play amount determination module 10, for according to the residing cell ID of each descending special pilot frequency, determine the frequency hopping side-play amount that descending special pilot frequency is corresponding, wherein, and can be according to formula $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4$ , or, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6$ Determine the frequency hopping side-play amount of descending special pilot frequency, can also make in addition $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}4$ , n=1 or 2 or 3, or $v_{\mathrm{shift}}=(N_{\mathrm{ID}}^{\mathrm{cell}}+n)\mathrm{mod}6$ , n=1 or 2 or 3,4,5.Wherein, N _iD ^cellthe ID that means community;

Primary importance determination module 20, for the frequency hopping side-play amount according to descending special pilot frequency and residing relative frequency domain position thereof, determine descending special pilot frequency frequency domain position in Physical Resource Block under it; This module can be connected to side-play amount determination module 10.

Mapping block 30, carry out resource mapping for the frequency domain position definite to descending special pilot frequency; This module can be connected to primary importance determination module 20.

Wherein, for relative frequency domain position and frequency hopping side-play amount and descending special pilot frequency that be greater than UE sub-carrier number that frequency domain is assigned with, primary importance determination module 20 determines that the frequency domain position of these descending special pilot frequencies is specially: the sub-carrier number that the relative frequency domain position of descending special pilot frequency and frequency hopping side-play amount sum are comprised each Resource Block carries out the resulting frequency domain position of delivery, (k '+v _shift) modN _sc ^rB, wherein, k ' means the relative frequency domain position of this descending special pilot frequency, N _sc ^rBthe number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is the corresponding frequency hopping side-play amount of this descending special pilot frequency.

Preferably, this device also comprises second place determination module (not shown), for the frequency domain position according to definite, determines the frequency domain position k of descending special pilot frequency at whole frequency domain: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}}$ , wherein, (k '+v _shift) modN _sc ^rBthe frequency domain position of this descending special pilot frequency in the Physical Resource Block for its distribution, n ^pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

The frequency hopping realizing device provided by the embodiment of the present invention, reduced the interference between the descending special pilot frequency of neighbor cell, improved the channel estimating performance of descending special pilot frequency.

As mentioned above, by means of implementing method for frequency-hopping provided by the invention and/or device, reduce the interference between the descending special pilot frequency of neighbor cell, improved the channel estimating performance of descending special pilot frequency, be beneficial to the covering of unified control channel and data channel.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (4)

1. an implementing method for frequency-hopping, is characterized in that, comprising:

For each descending special pilot frequency, according to its residing cell ID, determine the frequency hopping side-play amount that described descending special pilot frequency is corresponding;

Frequency hopping side-play amount and residing relative frequency domain position thereof according to described descending special pilot frequency, determine described descending special pilot frequency frequency domain position in Physical Resource Block under it, wherein, for described relative frequency domain position and described frequency hopping side-play amount and descending special pilot frequency that be greater than the sub-carrier number that this mobile terminal frequency domain distributes, describedly determine that the frequency domain position of described descending special pilot frequency is specially: the sub-carrier number that the relative frequency domain position of described descending special pilot frequency and described frequency hopping side-play amount sum comprise each Resource Block carries out resulting frequency domain position after delivery, ?

wherein, k ' means the relative frequency domain position of described descending special pilot frequency, the number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is described frequency hopping side-play amount,

For described descending special pilot frequency, according to the described frequency domain position of determining, carry out the resource mapping on whole frequency domain;

Wherein, in the normal cyclic prefix frame structure, according to the residing cell ID of each descending special pilot frequency, determine the frequency hopping side-play amount v that described descending special pilot frequency is corresponding _shiftoperation be specially: the frequency hopping side-play amount of described descending special pilot frequency $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4,$ Perhaps, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6,$ Wherein, the ID that means described community.

2. method according to claim 1, is characterized in that, the resource mapping carried out on whole frequency domain according to the described frequency domain position of determining is specially:

Determine the frequency domain position k of described descending special pilot frequency at whole frequency domain according to the described frequency domain position of determining: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}},$ Wherein,

the frequency domain position of described descending special pilot frequency in the Physical Resource Block for its distribution, n _pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

3. a frequency hopping realizing device, is characterized in that, comprising:

The side-play amount determination module, for according to the residing cell ID of each descending special pilot frequency, determine the frequency hopping side-play amount that described descending special pilot frequency is corresponding;

The primary importance determination module, for frequency hopping side-play amount and the residing relative frequency domain position thereof according to described descending special pilot frequency, determine described descending special pilot frequency frequency domain position in Physical Resource Block under it, wherein, described primary importance determination module specifically for: for described relative frequency domain position and described frequency hopping side-play amount and be greater than the descending special pilot frequency of frequency domain institute allocation of subcarriers number, describedly determine that the frequency domain position of described descending special pilot frequency is specially: the sub-carrier number that the relative frequency domain position of described descending special pilot frequency and described frequency hopping side-play amount sum comprise each Resource Block carries out resulting frequency domain position after delivery, ?

wherein, k ' means the relative frequency domain position of described descending special pilot frequency,

the number of the subcarrier that comprises of each minimal physical Resource Block, v _shiftit is described frequency hopping side-play amount,

Mapping block carries out resource mapping for the described frequency domain position that described descending special pilot frequency is determined on whole frequency domain;

Wherein, described side-play amount determination module is specifically in the normal cyclic prefix frame structure, according to formula $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4,$ Perhaps, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}6,$ Determine the frequency hopping side-play amount of descending special pilot frequency, wherein,

the ID that means described community.

4. device according to claim 3, is characterized in that,

Described device also comprises second place determination module, for the described frequency domain position according to determining, determines the frequency domain position k of described descending special pilot frequency at whole frequency domain: $k=(k^{\′}+v_{\mathrm{shift}})\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\·n_{\mathrm{PRB}},$ Wherein,

the frequency domain position of described descending special pilot frequency in the Physical Resource Block for its distribution, n _pRBbeing on the whole frequency domain of the public shared channel of downlink data, is the sequence number of the Physical Resource Block of terminal distribution.

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