CN101299634A - Method for transmitting special pilot frequency of LTE system - Google Patents

Abstract

The present invention provides a special pilot frequency transmission method of the LTE system. When the base station schedules the physical descending control channel and special pilot frequency onto the identical symbol in the sub-frame of the LTE system, the base station only transmits physical descending control channel on the identical symbol. The present invention solves the interfere problem between the physical descending control channel and the special pilot frequency, thereby ensuring the transmission performance of the physical descending control channel.

Description

The sending method of the dedicated pilot of LTE system

Technical field

The present invention relates to the communications field, in particular to the sending method of the dedicated pilot of a kind of LTE system.

Background technology

The frame structure of LTE (Long Term Evolution, Long Term Evolution) system as shown in Figure 1.In this frame structure, the radio frames of a 10ms is divided into two fields, it is the 0.5ms time slot that each field is divided into 10 length, two time slots are formed the subframe that length is 1ms, comprise 10 subframes (numbering from 0 to 9) in the radio frames, comprise 20 time slots (numbering from 0 to 19) in the radio frames.For length is regular circulation prefix (the Cyclic Prefix of 5.21 μ s and 4.69 μ s, CP), time slot comprise 7 length be 66.7 μ s on/descending symbol, wherein first symbol cyclic prefix length is 5.21 μ s, the circulating prefix-length of all the other 6 symbols is 4.69 μ s; For length is the extended cyclic prefix of 16.67 μ s, and time slot comprises on 6/descending symbol.

Physical Downlink Control Channel sends on preceding n symbol in subframe, and the value of n is by Physical Control Format Indicator Channel (Physical Control Format Indicator Channel, PCFICH) indication;

At present, the agreement regulation, in the TDD system, the symbol quantity that is used for transmitting physical downlink channel control on subframe 1 and the subframe 6 is 1 or 2; In the FDD system, as MBSFN (Multicast Broadcast Single Frequency Network, when multicast Single frequency network) not having the Physical Downlink Shared Channel transmission on the subframe, on this subframe, there is not the Physical Downlink Control Channel transmission, when the Physical Downlink Shared Channel transmission was arranged on the MBSFN subframe, the symbol quantity that is used for transmitting physical downlink channel control on this subframe was 1 or 2; When downlink bandwidth available resource block quantity during smaller or equal to k (k=10), the symbol quantity that is used for transmitting physical downlink channel control is 2 or 3 or 4; Under other situations, the symbol quantity that is used for transmitting physical downlink channel control is 1 or 2 or 3;

When system adopts the regular circulation prefix, send on dedicated pilot in subframe the 4th, the 7th, the tenth and the 13 symbol, as shown in Figure 2;

Concrete mapping formula is as follows:

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

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

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

$\begin{array}{c}{l}^{\&prime;}=\left\{\begin{array}{cc}\mathrm{0,1}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\\ \mathrm{2,3}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=1\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Wherein, N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBRepresent the index of corresponding PDSCH (Physical Downlink Share Channel, Physical Downlink Shared Channel) corresponding physical Resource Block, n at frequency domain _sThe timeslot number of representing corresponding PDSCH place, N _RB ^PDSCHThe bandwidth of representing corresponding PDSCH Resource Block, k represents that dedicated pilot is mapped to the frequency domain position of physical resource, l represents that dedicated pilot is mapped to the time-domain position of physical resource.

In realizing process of the present invention, the inventor finds that in this case when the symbol quantity that is used for transmitting physical downlink channel control was 4, Physical Downlink Control Channel can be mapped on the identical resource with dedicated pilot, produce conflict, influence the transmission performance of Physical Downlink Control Channel.

Summary of the invention

The present invention proposes a kind of sending method of dedicated pilot, to solve the problem of above-mentioned Physical Downlink Control Channel and dedicated pilot conflict.

In an embodiment of the present invention, the sending method of the dedicated pilot of a kind of LTE system is provided, when the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system, on same-sign, only send Physical Downlink Control Channel.

Preferably, the LTE system adopts the regular circulation prefix, and the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system and specifically comprises: Physical Downlink Control Channel and dedicated pilot are scheduled on the 4th symbol in the subframe; Specifically comprise only sending Physical Downlink Control Channel on the same-sign: on the 4th symbol, only send Physical Downlink Control Channel; And dedicated pilot destroyed.

In an embodiment of the present invention, the sending method of the dedicated pilot of a kind of LTE system also is provided, the base station is dispatched to the LTE system with Physical Downlink Control Channel and dedicated pilot, the LTE system adopts the regular circulation prefix, when on the 4th symbol of subframe during transmitting physical downlink channel control, on the 7th symbol of subframe, the tenth symbol and the 13 symbol, send dedicated pilot.

Preferably, sending dedicated pilot on the 7th symbol of subframe, the tenth symbol and the 13 symbol specifically comprises: the physical resource that dedicated pilot is mapped to time domain according to following formula: $l=\left\{\begin{array}{cc}3& l^{\&prime;}=0\\ 6& l^{\&prime;}=1\\ 2& l^{\&prime;}=2\\ 5& l^{\&prime;}=3\end{array}\right.$

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHThe 4th symbol in=4 expression subframes is as transmitting physical downlink channel control, n _PDCCHThe 4th symbol in ≠ 4 expression subframes be not as transmitting physical downlink channel control.

Preferably, subframe first, second and or the 3rd symbol on the Physical Downlink Control Channel transmission is also arranged.

Preferably, sending dedicated pilot on the 7th symbol of subframe, the tenth symbol and the 13 symbol specifically comprises: the physical resource that dedicated pilot is mapped to time domain according to following formula: $l=\left\{\begin{array}{cc}3& l^{\&prime;}=0\\ 6& l^{\&prime;}=1\\ 2& l^{\&prime;}=2\\ 5& l^{\&prime;}=3\end{array}\right.$

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHExpression is as the symbol quantity of transmitting physical downlink channel control.

Preferably, sending dedicated pilot on the 7th symbol of subframe, the tenth symbol and the 13 symbol specifically comprises: the physical resource that dedicated pilot is mapped to frequency domain according to following formula: $\begin{array}{c}k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}\\ k^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Perhaps

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$\begin{array}{c}{k}^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Wherein, $v_{\mathrm{shift}}=N_{\mathrm{<figure-callout\; id="4"\; label="ID\; cell\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">ID</figure-callout>}}^{\mathrm{cell}}\mathrm{mod}4,$ Perhaps, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}},$ N _ID ^CellBe sub-district ID; N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBExpression respective physical DSCH Downlink Shared Channel corresponding physical Resource Block is at the index of frequency domain, N _RB ^PDSCHThe bandwidth of expression respective physical DSCH Downlink Shared Channel Resource Block, k represents that dedicated pilot is mapped to the frequency domain position of physical resource, l represents that dedicated pilot is mapped to the time-domain position of physical resource.

In an embodiment of the present invention, also provide the sending method of the dedicated pilot of a kind of LTE system, may further comprise the steps: the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the distinct symbols in the subframe of LTE system; On distinct symbols, send Physical Downlink Control Channel and dedicated pilot respectively.

The sending method of the dedicated pilot of the foregoing description has solved above-mentioned Physical Downlink Control Channel and dedicated pilot collision problem, thereby has guaranteed the transmission performance of Physical Downlink Control Channel.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 shows the frame structure schematic diagram of LTE system;

Fig. 2 shows when system adopts the regular circulation prefix, the time-domain position schematic diagram of special-purpose pilot tone in the existing standard;

Fig. 3 shows the flow chart according to the sending method of the dedicated pilot of the embodiment of the invention;

Fig. 4 shows the flow chart of the sending method of dedicated pilot according to another embodiment of the present invention;

Fig. 5 shows according to the preferred embodiment of the invention to adopting the regular circulation prefix when system, and the symbol quantity that is used for transmitting physical downlink channel control is when being 4, the time-domain position schematic diagram of dedicated pilot;

Fig. 6 shows the flow chart of the sending method of dedicated pilot according to another embodiment of the present invention.

Embodiment

For the ease of profound understanding the present invention,, provide some specific embodiments that comprise sending method of the present invention below in conjunction with accompanying drawing 3 to 5.

Fig. 3 shows the flow chart according to the sending method of the dedicated pilot of the embodiment of the invention, may further comprise the steps:

Step S310, the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system;

Step S320 only sends Physical Downlink Control Channel on same-sign.

This sending method only sends Physical Downlink Control Channel on afoul symbol, thus solved above-mentioned Physical Downlink Control Channel and dedicated pilot collision problem, thus guaranteed the transmission performance of Physical Downlink Control Channel.

Preferably, the LTE system adopts the regular circulation prefix, and the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system and specifically comprises: Physical Downlink Control Channel and dedicated pilot are scheduled on the 4th symbol in the subframe; Specifically comprise only sending Physical Downlink Control Channel on the same-sign: on the 4th symbol, only send Physical Downlink Control Channel; And dedicated pilot destroyed.

Preferably, when Physical Downlink Control Channel and dedicated pilot sent on same-sign, dedicated pilot was struck off.

Fig. 4 shows the flow chart of the sending method of dedicated pilot according to another embodiment of the present invention, may further comprise the steps:

Step S410: the base station is dispatched to the LTE system with Physical Downlink Control Channel and dedicated pilot;

Step S420, the LTE system adopts the regular circulation prefix, when the Physical Downlink Control Channel transmission is arranged on the 4th symbol of subframe, sends dedicated pilot on the 7th symbol of subframe, the tenth symbol and the 13 symbol.

This sending method is arranged on the 7th symbol of frame, the tenth symbol and the 13 symbol and sends dedicated pilot, thus solved above-mentioned Physical Downlink Control Channel and dedicated pilot collision problem, thus guaranteed the transmission performance of Physical Downlink Control Channel.

Preferably, step S420 specifically comprises: the physical resource that dedicated pilot is mapped to time domain according to following formula: $l=\left\{\begin{array}{cc}3& l^{\&prime;}=0\\ 6& l^{\&prime;}=1\\ 2& l^{\&prime;}=2\\ 5& l^{\&prime;}=3\end{array}\right.$

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHThe 4th symbol in=4 expression subframes is as transmitting physical downlink channel control, n _PDCCHThe 4th symbol in ≠ 4 expression subframes be not as transmitting physical downlink channel control.

Preferably, subframe first, second and or the 3rd symbol on the Physical Downlink Control Channel transmission is also arranged.Step S420 comprises: the physical resource that dedicated pilot is mapped to time domain according to following formula: $l=\left\{\begin{array}{cc}3& l^{\&prime;}=0\\ 6& l^{\&prime;}=1\\ 2& l^{\&prime;}=2\\ 5& l^{\&prime;}=3\end{array}\right.$

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{\mathrm{<figure-callout\; id="2"\; label="n\; s\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">n</figure-callout>}}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHExpression is as the symbol quantity of transmitting physical downlink channel control.

Preferably, step S420 specifically comprises: the physical resource that dedicated pilot is mapped to frequency domain according to following formula: $\begin{array}{c}k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}\\ k^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Perhaps

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$\begin{array}{c}{k}^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Wherein, $v_{\mathrm{shift}}=N_{\mathrm{<figure-callout\; id="4"\; label="ID\; cell\; mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">ID</figure-callout>}}^{\mathrm{cell}}\mathrm{mod}4,$ Perhaps, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}},$ N _ID ^CellBe sub-district ID; N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBExpression respective physical DSCH Downlink Shared Channel corresponding physical Resource Block is at the index of frequency domain, N _RB ^PDSCHThe bandwidth of expression respective physical DSCH Downlink Shared Channel Resource Block, k represents that dedicated pilot is mapped to the frequency domain position of physical resource, l represents that dedicated pilot is mapped to the time-domain position of physical resource.

Embodiment one, when system adopts the regular circulation prefix, and when the 4th symbol is as the Physical Downlink Control Channel transmission in the subframe, sends on dedicated pilot in subframe the 7th, the tenth and the 13 symbol, as shown in Figure 5;

Dedicated pilot is as follows to the time domain mapping formula of physical resource:

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

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=1\end{array}\right.$

Dedicated pilot is as follows to the frequency domain mapping formula of physical resource:

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$\begin{array}{c}{k}^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Wherein, N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBRepresent the index of corresponding PDSCH corresponding physical Resource Block, n at frequency domain _sThe timeslot number of representing corresponding PDSCH place, N _RB ^PDSCHThe bandwidth of representing corresponding PDSCH Resource Block, n _PDCCHExpression is as the symbol quantity of transmitting physical downlink channel control, and k represents that dedicated pilot is mapped to the frequency domain position of physical resource, and l represents that dedicated pilot is mapped to the time-domain position of physical resource.

Embodiment two

When system adopts the regular circulation prefix, and when the 4th symbol is as the Physical Downlink Control Channel transmission in the subframe, send on dedicated pilot in subframe the 7th, the tenth and the 13 symbol, as shown in Figure 5;

Dedicated pilot is as follows to the time domain mapping formula of physical resource:

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

$l^{\&prime;}=\left\{\begin{array}{cc}1& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}& \mathrm{if}{n}_s\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="A20081012711800161.png"\; state="\{\{state\}\}">mod</figure-callout>}2=1\end{array}\right.$

Dedicated pilot is as follows to the frequency domain mapping formula of physical resource:

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$\begin{array}{c}{k}^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.\\ m^{\&prime;}=\mathrm{0,1},...,3N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1\end{array}$

Wherein, N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBRepresent the index of corresponding PDSCH corresponding physical Resource Block, n at frequency domain _sThe timeslot number of representing corresponding PDSCH place, N _RB ^PDSCHThe bandwidth of representing corresponding PDSCH Resource Block, n _PDCCHExpression is as the symbol quantity of transmitting physical downlink channel control, and k represents that dedicated pilot is mapped to the frequency domain position of physical resource, and l represents that dedicated pilot is mapped to the time-domain position of physical resource.

n _PDCCHWhether represent the 4th symbol as transmitting physical downlink channel control, when as the transmitting physical downlink channel control transmission, n _PDCCH=4, when not as the transmitting physical downlink channel control transmission, n _PDCCH≠ 4,

Fig. 6 shows the flow chart according to the sending method of the dedicated pilot of the embodiment of the invention, may further comprise the steps:

Step S610, the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the distinct symbols in the subframe of LTE system;

Step S620 sends Physical Downlink Control Channel and dedicated pilot respectively on distinct symbols.

The sending method of the dedicated pilot of described embodiment has solved above-mentioned Physical Downlink Control Channel and dedicated pilot collision problem, has guaranteed the transmission performance of Physical Downlink Control Channel;

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

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

Claims (8)

1. the sending method of the dedicated pilot of a LTE system is characterized in that,

When the base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system, on described same-sign, only send described Physical Downlink Control Channel.

2. sending method according to claim 1 is characterized in that, described LTE system adopts the regular circulation prefix,

The base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the same-sign in the subframe of LTE system and specifically comprises: described Physical Downlink Control Channel and described dedicated pilot are scheduled on the 4th symbol in the described subframe;

Specifically comprise only sending described Physical Downlink Control Channel on the described same-sign: on described the 4th symbol, only send described Physical Downlink Control Channel; And described dedicated pilot destroyed.

3. the sending method of the dedicated pilot of a LTE system is characterized in that,

The base station is dispatched to the LTE system with Physical Downlink Control Channel and dedicated pilot, described LTE system adopts the regular circulation prefix, when on the 4th symbol of subframe during transmitting physical downlink channel control, on the 7th symbol of subframe, the tenth symbol and the 13 symbol, send dedicated pilot.

4. sending method according to claim 3 is characterized in that, sends dedicated pilot and specifically comprise on the 7th symbol of subframe, the tenth symbol and the 13 symbol:

Described dedicated pilot is mapped to the physical resource of time domain according to following formula:

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

$l^{\&prime;}=\left\{\begin{array}{c}1\mathrm{if}{n}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}\mathrm{if}{n}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}\mathrm{if}{n}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHThe 4th symbol in the described subframe of=4 expressions is as the described Physical Downlink Control Channel of transmission, n _PDCCHThe 4th symbol in the described subframe of ≠ 4 expressions be not as the described Physical Downlink Control Channel of transmission.

5. sending method according to claim 3 is characterized in that, subframe first, second and or the 3rd symbol on the Physical Downlink Control Channel transmission is also arranged.

6. sending method according to claim 5 is characterized in that, sends dedicated pilot and specifically comprise on the 7th symbol of subframe, the tenth symbol and the 13 symbol:

Described dedicated pilot is mapped to the physical resource of time domain according to following formula:

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

$l^{\&prime;}=\left\{\begin{array}{c}1\mathrm{if}{n}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}=4\\ \mathrm{0,1}\mathrm{if}{n}_s\mathrm{mod}2=0\mathrm{and}{n}_{\mathrm{PDCCH}}\&NotEqual;4\\ \mathrm{2,3}\mathrm{if}{n}_s\mathrm{mod}2=1\end{array}\right.$

n _sThe timeslot number at expression respective physical DSCH Downlink Shared Channel place, l represents that dedicated pilot is mapped to the time-domain position of physical resource, n _PDCCHExpression is as the symbol quantity of the described Physical Downlink Control Channel of transmission.

7. according to claim 4 or 6 described sending methods, it is characterized in that, on the 7th symbol of subframe, the tenth symbol and the 13 symbol, send dedicated pilot and specifically comprise:

Described dedicated pilot is mapped to the physical resource of frequency domain according to following formula:

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$k^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.$

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

Perhaps

$k=\left(k^{\&prime;}\right)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}+N_{\mathrm{sc}}^{\mathrm{RB}}\&CenterDot;n_{\mathrm{PRB}}$

$k^{\&prime;}=\left\{\begin{array}{cc}4m^{\&prime;}+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{2,3}\right\}\\ 4m^{\&prime;}+2+v_{\mathrm{shift}}& \mathrm{ifl}\&Element;\left\{\mathrm{5,6}\right\}\end{array}\right.$

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

Wherein, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}4,$ Perhaps, $v_{\mathrm{shift}}=N_{\mathrm{ID}}^{\mathrm{cell}},$

N _ID ^CellBe sub-district ID; N _Sc ^RBRepresent the number of subcarriers that comprises in the Resource Block, n _PRBExpression respective physical DSCH Downlink Shared Channel corresponding physical Resource Block is at the index of frequency domain, N _RB ^PDSCHThe bandwidth of expression respective physical DSCH Downlink Shared Channel Resource Block, k represents that dedicated pilot is mapped to the frequency domain position of physical resource, l represents that dedicated pilot is mapped to the time-domain position of physical resource.

8. the sending method of the dedicated pilot of a LTE system is characterized in that, may further comprise the steps:

The base station is dispatched to Physical Downlink Control Channel and dedicated pilot on the distinct symbols in the subframe of LTE system;

On described distinct symbols, send described Physical Downlink Control Channel and described dedicated pilot respectively.

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