CN101183920A - Method and apparatus for mapping PHICH to physical subcarrier - Google Patents

Abstract

The invention provides a mapping method and device for an indication channel PHICH of a physical hybrid automatic repeat request to a physical sub-carrier, comprising a plurality of mapping steps of a frequency domain. The invention is characterized in that: a plurality of usable physical sub-carriers of an FDD system is evenly divided into four areas; the three resource groups of a PHICH are one-to-one correspondence with the three areas of the four areas. The invention has the advantages of ensured diversity gain of PHICH and simple realization and little influence on performance of other downlink physical channels.

Description

PHICH is to the mapping method and the device of physical sub-carrier

Technical field

The present invention relates to the communications field, and especially, relate to mapping method and the device of a kind of PHICH to physical sub-carrier.

Background technology

The develop rapidly of digital communication system is had higher requirement to reliability of data communication, yet under abominable channel, especially in high data rate or the high-speed mobile environment, multipath interference and Doppler frequency shift etc. seriously affect systematic function.Therefore, effective error-control technique, (Hybrid Automatic RepeatRequest, HARQ) technology just becomes the focus that the communications field endeavours to study especially to mix automatic request retransmission.

At third generation partner program (3rd Generation Partnership Project, 3GPP) Long Term Evolution (Long Term Evolution, LTE) Ji Hua FDD (FrequencyDivision Duplex, frequency division multiplexing) in the system, down physical channel comprises Physical Control Format Indicator Channel (Physical Control Format Indicator Channel, PCFICH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) and the automatic request retransmission indicating channel of physical mixed (Physical Hybrid ARQ IndicatorChannel PHICH) waits channel.

Wherein, PHICH is used to transmit descending ACK and nack message.PHICH can account for 3 OFDM (Orthogonal Frequency DivisionMultiplexing, Orthodoxy Frequency Division Multiplex) symbol on time domain, also can account for 1 OFDM symbol.When coexisting with many ripples of physics channel, can also account for 2 OFDM symbols, concrete occupation mode is notified by signaling.The corresponding user of PHICH, the PHICH of different user can carry out code division multiplexing on same asset, also can divide multiplexingly at the enterprising line frequency of different resource, makes that a plurality of PHICH multiplexing on same asset are a PHICH group; A PHICH after modulation, corresponding three resource groups, each resource group need be mapped on the subcarrier of removing the pilot tone continuous adjacent accordingly, and three resource groups of each PHICH need be mapped on those physical sub-carriers.At present, suitable solution is not also designed in the mapping of PHICH, therefore, the FDD system of 3GPP LTE plan also can't drop into application.

Summary of the invention

Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide mapping method and the device of a kind of PHICH to physical sub-carrier.

In an embodiment of the present invention, the automatic request retransmission indicating channel of a kind of physical mixed PHICH is provided the mapping method to physical sub-carrier, comprise the frequency domain mapping step: on frequency domain, available physical subcarrier with the FDD system, evenly be divided into four zones, one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.

This corresponding relation can be to be the cycle with four PHICH group, chooses a trizonal combination with each PHICH group is corresponding from these four zones; And the combination that continuous four PHICH group correspondence is set has nothing in common with each other.

According to the difference of sub-district ID, each sub-district PHICH is provided with different frequency domain initial positions.

Preferably, with four PHICH groups is the cycle, each PHICH group correspondence is chosen a trizonal combination from these four zones specifically comprise: suppose that four zones are A, B, C and D, choosing trizonal combination from four zones has { four kinds of ABC, ABD, ACD, BCD}, the corresponding above-mentioned a kind of combination of choosing of each PHICH group.

Preferably, the corresponding combination of continuous four PHICH group being set has nothing in common with each other and specifically comprises:

The combination that continuous four PHICH group correspondence is set has nothing in common with each other and specifically comprises:

$N_{\mathrm{RE}}^{\mathrm{DL}}=N_{\mathrm{RB}}^{\mathrm{DL}}\×N_{\mathrm{SC}}^{\mathrm{RB}};$

During no physics Multicast Channel: N _T=1,3; When Physical Multicast Channel is arranged: N _T=1,2; $y(i,m)=(k(i,m)+L\×f(i,m))\mathrm{mod}{N}_{\mathrm{RE}}^{\mathrm{DL}};$ Perhaps, and y (i, m)=k (i, m)+L * f (i, m); F (i, m)=(i+m * 3) mod4; K (i, m)=N _RE* ((x ₀+ g (i, m)) mod N _Total), perhaps,

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}+1,$ Perhaps,

Perhaps, $x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}\mathrm{mod}{N}_{\mathrm{Total}}+1;$ i＝0，1，2； $m=\mathrm{0,1},\·\·\·,N_{{\mathrm{PHICH}}_{\mathrm{group}}}-1;$ Wherein, N _RE ^DLThe sum of available RE in the expression system, N _RB ^DLBe illustrated in Resource Block quantity available under the current system bandwidth; N _SC ^RBRepresent that a Resource Block comprises the quantity of subcarrier; N _TotalWhen being illustrated in pilot tone and no pilot tone, the resource group number that the interior available physical subcarrier of OFDM symbol can be divided; N _REThe physical sub-carrier quantity that the resource group can comprise: L represents to comprise in the zone quantity of physical sub-carrier when being illustrated in pilot tone and no pilot tone; N _TThe OFDM symbol quantity that expression PHICH continues; I represents that a PHICH organizes the sequence number of pairing three resource groups, N _PHICHgroupThe quantity of expression PHICH group, m represents the sequence number of PHICH group, each PHICH group contains 4 or 8 PHICH channels; N _ID ^CellThe ID of expression current area, f (i, the m) zone at the frequency domain place of i resource group of m PHICH of expression, k (i, m) the physical sub-carrier position of frequency domain in the target area of i resource group of m PHICH of expression, x ₀The side-play amount of expression Target cell PHICH initial position, g (i, m) relative position of frequency domain in the target area of i resource group of m PHICH of expression; (this resource group is mapped to this original position and begins y, removes pilot tone for i, the m) original position of the frequency domain of expression m PHICH i resource group, and on the continuous N physical sub-carrier, M represents the symbol quantity after the modulation that a resource group comprised.

Preferably, according to the difference of sub-district ID, each sub-district PHICH is provided with different frequency domain initial positions.

Preferably, also can comprise the time domain mapping step: on time domain, when the PHICH duration is 3 OFDM symbols, resource group of mapping on each symbol, when the PHICH duration was 2 OFDM symbols, a PHICH shone upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

Preferably, the time domain mapping step specifically comprises: N _T≠ 1, l (i, m)=(i+m) mod N _T, perhaps, $l(i,m)=(i+m+N_{\mathrm{ID}}^{\mathrm{Cell}})\mathrm{mod}{N}_T;$ N _T=1, and l (i, m)=0; Wherein, N _TThe OFDM symbol quantity that expression PHICH continues; I represents that a PHICH organizes the sequence number of pairing three resource groups, and m represents the sequence number of PHICH group; N _ID ^CellThe ID of expression current area; L (i, m) the OFDM character position of i resource group of m PHICH group of expression.

When the PHICH duration was a plurality of OFDM symbol, different primary sign positions can be chosen according to the difference of sub-district ID in each sub-district, and perhaps, identical primary sign position is chosen in each sub-district.

The mapping method of this embodiment provides PHICH to be mapped to solution on those physical sub-carriers, has therefore guaranteed the diversity gain of PHICH and the simplicity of realization, and is simultaneously, also very little to the performance impact of other down physical channels.

In an embodiment of the present invention, the automatic request retransmission indicating channel of a kind of physical mixed PHICH also is provided the mapping device to physical sub-carrier, comprise the frequency domain mapping block, it comprises: regional corresponding unit, be used at frequency domain, with the available physical subcarrier of FDD system, evenly be divided into four zones, one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.

Preferably, the frequency domain mapping block also comprises: the combination corresponding unit, and being used for four PHICH groups is the cycle, and each PHICH group correspondence is chosen a trizonal combination from these four zones; And combination is provided with the unit, is used to be provided with the corresponding combination of continuous four PHICH group and has nothing in common with each other.

Preferably, also can comprise the time domain mapping block, it comprises: first map unit, be used in time domain, and when the PHICH duration is 3 OFDM symbols, resource group of mapping on each symbol; Second map unit, be used for when the PHICH duration is 2 OFDM symbols, a PHICH shines upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

Preferably, also comprise: the initial setting up module, be used for difference according to sub-district ID, the initial position difference of each sub-district PHICH is set.

The mapping device of this embodiment provides PHICH to be mapped to solution on those physical sub-carriers, has therefore guaranteed the diversity gain of PHICH and the simplicity of realization, and is simultaneously, also very little to the performance impact of other down physical channels.

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 is the flow chart according to the PHICH of the embodiment of the invention frequency domain mapping step in the mapping method of physical sub-carrier;

Fig. 2 is the schematic diagram that shines upon at 3 OFDM symbols in the mapping method of physical sub-carrier according to the PHICH of the embodiment of the invention;

Fig. 3 is the schematic diagram that shines upon at 1 OFDM symbol in the mapping method of physical sub-carrier according to the PHICH of the embodiment of the invention; And

Fig. 4 is the block diagram according to the PHICH of the embodiment of the invention frequency domain mapping block in the mapping device of physical sub-carrier.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.

Fig. 1 is according to the flow chart of the PHICH of the embodiment of the invention frequency domain mapping step in the mapping method of physical sub-carrier, comprises the frequency domain mapping step:

Step S10 on frequency domain, with the available physical subcarrier of FDD system, evenly is divided into four zones, and one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.

The frequency domain mapping step also can comprise:

Step S20 is the cycle with four PHICH groups, and each PHICH group correspondence is chosen a trizonal combination from these four zones; And

Step S30 is provided with the corresponding combination of continuous four PHICH group and has nothing in common with each other.

The mapping method of this embodiment provides PHICH to be mapped to solution on those physical sub-carriers, has therefore guaranteed the diversity gain of PHICH and the simplicity of realization, and is simultaneously, also very little to the performance impact of other down physical channels.

On frequency domain, with the available physical subcarrier of system, evenly be divided into four zones, one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.Each resource group position in respective regions can be identical, also can be different.Suppose that four zones are A, B, C and D, choosing trizonal combination from four zones has { four kinds of ABC, ABD, ACD, BCD}, the corresponding above-mentioned a kind of combination of choosing of each PHICH group, with four PHICH groups is the cycle to choose combination, and guarantees that the chosen area compound mode of continuous four PHICH group is variant.Can be according to the difference of sub-district ID, each sub-district PHICH is provided with different frequency domain initial positions.

Provide a kind of specific embodiments below, suppose that PHICH group choosing three from four zones when regional, is the cycle with ABC, ABD, BCD, ACD, choose the mapping area of each PHICH group, then

Suppose N _RE ^DLThe sum of available RE in the expression system, N _RB ^DLBe illustrated in Resource Block quantity available under the current system bandwidth; V _SC ^RBRepresent that a Resource Block comprises the quantity of subcarrier; N _TotalWhen being illustrated in pilot tone and no pilot tone, the resource group number that the interior available physical subcarrier of OFDM symbol can be divided; N _REThe physical sub-carrier quantity that the resource group can comprise: L represents to comprise in the zone quantity of physical sub-carrier when being illustrated in pilot tone and no pilot tone; N _TThe OFDM symbol quantity that expression PHICH continues; So concrete formula is:

$N_{\mathrm{RE}}^{\mathrm{DL}}=N_{\mathrm{RB}}^{\mathrm{DL}}\×N_{\mathrm{SC}}^{\mathrm{RB}}$

N _T=1,3; (no physics Multicast Channel) N _T=1,2; (Physical Multicast Channel is arranged)

Concrete mapping formula is as follows:

$y(i,m)=(k(i,m)+L\×f(i,m))\mathrm{mod}{N}_{\mathrm{RE}}^{\mathrm{DL}};$ Perhaps, and y (i, m)=k (i, m)+L * f (i, m);

f(i，m)＝(i+m×3)mod4；

K (i, m)=N _RE* ((x ₀+ g (i, m)) mod N _Total), perhaps,

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}+1,$ Perhaps,

Perhaps,

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}\mathrm{mod}{N}_{\mathrm{Total}}+1;$

i＝0，1，2； $m=\mathrm{0,1},\·\·\·,N_{{\mathrm{PHICH}}_{\mathrm{group}}}-1;$

I represents that a PHICH organizes the sequence number of pairing three resource groups, N _PHICHgroupThe quantity of expression PHICH group, m represents the sequence number of PHICH group (containing 4 or 8 PHICH channels);

N _ID ^CellThe ID of expression current area, N _RE ^DLThe sum of available RE in the expression system, f (i, the m) zone at the frequency domain place of i resource group of m PHICH of expression, k (i, m) the physical sub-carrier position of frequency domain in the target area of i resource group of m PHICH of expression, x ₀The side-play amount of expression Target cell PHICH initial position, g (i, m) relative position of frequency domain in the target area of i resource group of m PHICH of expression.

(this resource group is mapped to this original position and begins y, removes pilot tone for i, the m) original position of the frequency domain of expression m PHICH i resource group, and on the continuous N physical sub-carrier, M represents the symbol quantity after the modulation that a resource group comprised.

Fig. 2 is the schematic diagram that shines upon at 3 OFDM symbols in the mapping method of physical sub-carrier according to the PHICH of the embodiment of the invention; Fig. 3 is the schematic diagram that shines upon at 1 OFDM symbol in the mapping method of physical sub-carrier according to the PHICH of the embodiment of the invention.

Mapping method according to the embodiment of the invention, also can comprise the time domain mapping step: on time domain, when the PHICH duration is 3 OFDM symbols, resource group of mapping on each symbol, when the PHICH duration was 2 OFDM symbols, a PHICH shone upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

Preferably, the time domain mapping step specifically comprises: N _T≠ 1, l (i, m)=(i+m) mod N _T, perhaps, $l(i,m)=(i+m+N_{\mathrm{ID}}^{\mathrm{Cell}})\mathrm{mod}{N}_T;$ N _T＝1，l(i，m)＝0；

Wherein, N _TThe OFDM symbol quantity that expression PHICH continues; I represents that a PHICH organizes the sequence number of pairing three resource groups, and m represents the sequence number of PHICH group; N _ID ^CellThe ID of expression current area; L (i, m) the OFDM character position of i resource group of m PHICH group of expression;

When the PHICH duration was a plurality of OFDM symbol, different primary sign positions can be chosen according to the difference of sub-district ID in each sub-district, and perhaps, identical primary sign position is chosen in each sub-district.

By technique scheme of the present invention, guaranteed the diversity gain of PHICH and the simplicity of realization, simultaneously, also very little to the performance impact of other down physical channels.

Below will be with third generation partner program (3rd Generation PartnershipProject, 3GPP) Long Term Evolution plan (Long Term Evolution, LTE) FDD (Frequency Division Duplex, frequency division multiplexing) system is an example, describes the present invention in detail.

In this example, suppose that bandwidth is 5MHz, then number of usable subcarriers is 300, contains 14 continuous OFDM symbols in the subframe, the emission of four antennas, and the original position of first antenna pilot is the 3rd subcarrier.

Example 1

Correct response message and/or error response message are being mapped under the situation of 3 OFDM symbols, and corresponding concrete parameter is as follows:

$N_{\mathrm{RE}}^{\mathrm{DL}}=300,$ $N_{\mathrm{RB}}^{\mathrm{DL}}=25,$ $N_{\mathrm{SC}}^{\mathrm{RB}}=12,$ N _T＝3， $N_{\mathrm{ID}}^{\mathrm{Cell}}=1,$ m＝1

The corresponding parameter that derives from is:

$l(i,m)=(i+m+N_{\mathrm{ID}}^{\mathrm{Cell}})\mathrm{mod}{N}_T$

l(0，1)＝(0+1+1)mod?3＝2；l(1，1)＝(1+1+1)mod?3＝0；

l(2，1)＝(2+1+1)mod?3＝1；

y(i，m)＝k(i，m)+L×f(i，m)；

f(i，m)＝(i+m×3)mod?4；

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}+1;$

So,

Three set of resources of m PHICH group are not mapped on the 12nd, the 13rd, the 15th of the 0th OFDM symbol and the 16th subcarrier, on the 84th, the 85th, the 87th of the 1st OFDM symbol and the 88th subcarrier, on the 224th, the 225th, the 226th of the 2nd OFDM symbol and the 227th subcarrier

Example 2

Correct response message and/or error response message are being mapped under the situation of 1 OFDM symbol, and corresponding concrete parameter is as follows:

$N_{\mathrm{RE}}^{\mathrm{DL}}=300,$ $N_{\mathrm{RB}}^{\mathrm{DL}}=25,$ $N_{\mathrm{SC}}^{\mathrm{RB}}=12,$ N _T＝3， $N_{\mathrm{ID}}^{\mathrm{Cell}}=1,$ m＝1

The corresponding parameter that derives from is:

l(i，m)＝0

l(0，1)＝l(1，1)＝l(2，1)＝0；

Three set of resources of m PHICH group are not mapped to the 12nd, the 13rd, the 15th, the 16th and the 84th, the 85th, the 87th, the 88th of the 0th OFDM symbol, and on the 224th, the 225th, the 227th, the 228th subcarrier.

Fig. 4 is according to the block diagram of the PHICH of the embodiment of the invention frequency domain mapping block in the mapping device of physical sub-carrier, comprises the frequency domain mapping block, and it comprises:

Zone corresponding unit 10 is used at frequency domain, with the available physical subcarrier of FDD system, evenly is divided into four zones, and one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones;

Combination corresponding unit 20, being used for four PHICH groups is the cycle, and each PHICH group correspondence is chosen a trizonal combination from these four zones; And

Combination is provided with unit 30, is used to be provided with the corresponding combination of continuous four PHICH group and has nothing in common with each other.

Preferably, also comprise: the time domain mapping block, be used on the time domain, it comprises:

First map unit is used in time domain, when the PHICH duration is 3 OFDM symbols, and resource group of mapping on each symbol;

Second map unit, be used for when the PHICH duration is 2 OFDM symbols, a PHICH shines upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

Preferably, also comprise: the initial setting up module, be used for difference according to sub-district ID, the frequency domain initial position that each sub-district PHICH is set can be different, and the initial OFDM symbol of time domain can be identical, also can be different.

In sum, guaranteed the diversity gain of PHICH and the simplicity of realization, simultaneously, also very little to the performance impact of other down physical channels.

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 (12)

1. the automatic request retransmission indicating channel of a physical mixed PHICH is characterized in that to the mapping method of physical sub-carrier, comprises the frequency domain mapping step:

On frequency domain, with the available physical subcarrier of FDD system, evenly be divided into four zones, one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.

2. mapping method according to claim 1 is characterized in that, the frequency domain mapping step also comprises:

With four PHICH groups is the cycle, and each PHICH group correspondence is chosen a trizonal combination from these four zones; And

The corresponding combination of continuous four PHICH group is set to have nothing in common with each other.

3. mapping method according to claim 2 is characterized in that, is the cycle with four PHICH groups, each PHICH group correspondence is chosen a trizonal combination specifically comprise from these four zones:

If four zones are A, B, C and D, choosing trizonal combination from four zones has { four kinds of ABC, ABD, ACD, BCD}, above-mentioned a kind of combination of choosing;

With ABC, ABD, BCD, ACD is the cycle, the corresponding combination of each PHICH group.

4. mapping method according to claim 1 is characterized in that, the combination that continuous four PHICH group correspondence is set has nothing in common with each other and specifically comprises:

$N_{\mathrm{RE}}^{\mathrm{DL}}=N_{\mathrm{RB}}^{\mathrm{DL}}\×N_{\mathrm{SC}}^{\mathrm{RB}};$

During no physics Multicast Channel: N _T=1,3;

When Physical Multicast Channel is arranged: N _T=1,2;

$y(i,m)=(k(i,m)+L\×f(i,m))\mathrm{mod}{N}_{\mathrm{RE}}^{\mathrm{DL}};$ Perhaps,

y(i，m)＝k(i，m)+L×f(i，m)；

f(i，m)＝(i+m×3)mod?4；

K (i, m)=N _RE* ((x ₀+ g (i, m)) mod N _Total), perhaps,

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}+1,$ Perhaps, Perhaps,

$x_0=N_{\mathrm{ID}}^{\mathrm{Cell}}\mathrm{mod}{N}_{\mathrm{Total}}+1;$

i＝0，1，2； $m=\mathrm{0,1},\·\·\·,N_{{\mathrm{PHICH}}_{\mathrm{group}}}-1;$

Wherein, N _RE ^DLThe sum of available RE in the expression system, N _RB ^DLBe illustrated in Resource Block quantity available under the current system bandwidth; N _SC ^RBRepresent that a Resource Block comprises the quantity of subcarrier; N _TotalWhen being illustrated in pilot tone and no pilot tone, the resource group number that the interior available physical subcarrier of OFDM symbol can be divided; N _REThe physical sub-carrier quantity that the resource group can comprise: L represents to comprise in the zone quantity of physical sub-carrier when being illustrated in pilot tone and no pilot tone; N _TThe OFDM symbol quantity that expression PHICH continues;

I represents that a PHICH organizes the sequence number of pairing three resource groups, N _PHICHgroupThe quantity of expression PHICH group, m represents the sequence number of PHICH group, each PHICH group contains 4 or 8 PHICH channels;

N _ID ^CellThe ID of expression current area, f (i, the m) zone at the frequency domain place of i resource group of m PHICH of expression, k (i, m) the physical sub-carrier position of frequency domain in the target area of i resource group of m PHICH of expression, x ₀The side-play amount of expression Target cell PHICH initial position, g (i, m) relative position of frequency domain in the target area of i resource group of m PHICH of expression;

(this resource group is mapped to this original position and begins y, removes pilot tone for i, the m) original position of the frequency domain of expression m PHICH i resource group, and on the continuous N physical sub-carrier, M represents the symbol quantity after the modulation that a resource group comprised.

5. mapping method according to claim 1 is characterized in that, also comprises: according to the difference of sub-district ID, each sub-district PHICH is provided with different frequency domain initial positions.

6. mapping method according to claim 1 is characterized in that, also comprises the time domain mapping step:

On time domain, when the PHICH duration is 3 OFDM symbols, resource group of mapping on each symbol, when the PHICH duration is 2 OFDM symbols, a PHICH shines upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

7. mapping method according to claim 6 is characterized in that, when the PHICH duration was a plurality of OFDM symbol, different primary sign positions can be chosen according to the difference of sub-district ID in each sub-district, and perhaps, identical primary sign position is chosen in each sub-district.

8. mapping method according to claim 6 is characterized in that, described time domain mapping step specifically comprises:

N _T≠ 1, l (i, m)=(i+m) mod N _T, perhaps, $l(i,m)=(i+m+N_{\mathrm{ID}}^{\mathrm{Cell}})\mathrm{mod}{N}_T;$

N _T＝1，l(i，m)＝0；

Wherein, N _TThe OFDM symbol quantity that expression PHICH continues;

I represents that a PHICH organizes the sequence number of pairing three resource groups, and m represents the sequence number of PHICH group;

N _ID ^CellThe ID of expression current area;

L (i, m) the OFDM character position of i resource group of m PHICH group of expression.

9. the automatic request retransmission indicating channel of a physical mixed PHICH is characterized in that to the mapping device of physical sub-carrier comprise the frequency domain mapping block, it comprises:

The zone corresponding unit is used at frequency domain, with the available physical subcarrier of FDD system, evenly is divided into four zones, and one-to-one relationship is set up in three resource groups of a PHICH and three zones in this four zones.

10. mapping device according to claim 9 is characterized in that, described frequency domain mapping block also comprises:

The combination corresponding unit, being used for four PHICH groups is the cycle, and each PHICH group correspondence is chosen a trizonal combination from these four zones; And

Combination is provided with the unit, is used to be provided with the corresponding combination of continuous four PHICH group and has nothing in common with each other.

11. mapping device according to claim 9 is characterized in that, also comprises the time domain mapping block, it comprises:

First map unit is used in time domain, when the PHICH duration is 3 OFDM symbols, and resource group of mapping on each symbol;

Second map unit, be used for when the PHICH duration is 2 OFDM symbols, a PHICH shines upon a resource group on first symbol, two resource groups of mapping on second symbol, another PHICH shines upon two resource groups on first symbol, resource group of mapping on second symbol.

12. mapping device according to claim 11, it is characterized in that, also comprise the initial setting up module, be used for when the PHICH duration is a plurality of OFDM symbol, different primary sign positions is chosen according to the difference of sub-district ID in each sub-district, perhaps, identical primary sign position is chosen in each sub-district.

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