CN101883401B - Resource scheduling method and device of feedback information - Google Patents

Abstract

The invention provides a resource scheduling method of feedback information. The method comprises the following steps. A base station queues the minimum PRB numbers of the PUSCH transmission resource of N users. The base station chooses one DMRS sequence from the collection of available DMRS sequences for the user UE1 which ranks first in the queue and calculates corresponding PHICH resource according to the minimum PRB number and the index value of the DMRS sequence of the user. The base station chooses one index value different from the DMRS sequence of the previous user from the collection of available DMRS sequences for other users in the queue and calculates the corresponding PHICH resource according to the minimum PRB number and the index value of the DMRS sequence of the user. According to the technical scheme of the invention, the confliction problem of the PHICH resource of a plurality of users in the system is solved, consequently the PHICH resource can be distributed reasonably and system performance is optimized.

Description

A kind of method and apparatus of scheduling of resource of feedback information

Technical field

The present invention relates to moving communicating field, particularly, the present invention relates to a kind of method and apparatus of scheduling of resource of feedback information.

Background technology

Mobile and broadband becomes the developing direction of modern communication technology, 3GPP (3rd GenerationPartnership Project, third generation partner program) be devoted to the evolution of 3G system, target is development 3GPP wireless access technology towards high data rate, lowly postpones and optimize the evolution of packet data application direction.3GPP is at LTE (Long Term Evolution, Long Term Evolution) and LTE-A (LongTerm Evolution-Advanced, Long Term Evolution is senior) in the system, for PUSCH (PhysicalUplink Shared Channel, Physical Uplink Shared Channel) transmission of feedback information ACK/NACK is to be undertaken by PHICH (Physical hybrid-ARQ Indicator Channel, physical mixed automatic repeat request indicating channel).Usually, the resource of PHICH is to (n by a parameter _PHICH ^Group, n _PHICH ^{S eq}) indication, wherein n _PHICH ^GroupThe numbering of PHICH group, n _PHICH ^SeqBe the index of orthogonal sequence, these two parameters can calculate by the aggregate information of the resource allocation information in the schedule information of PUSCH and DMRS sequence.

For the ease of understanding the present invention, the below does simple the introduction to the related definition of the PHICH in the LTE system.

PHICH is used for the feedback information ACK/NACK of carrying uplink service.The resource indication of a PHICH channel is main passes through a parameter to (n _PHICH ^Group, n _PHICH ^Seq) indication, wherein n _PHICH ^GroupThe numbering of PHICHgroup, n _PHICH ^SeqIt is the index of orthogonal sequence.The mode that the transmission of PHICH channel adopts frequency division+code to divide is transmitted.

The concept of PHICH group refers to the set of one group of RE (Resource Element, Resource Unit), can transmit a plurality of PHICH channels in the set of this RE, and each PHICH interchannel is distinguished by orthogonal sequence.For conventional CP (Normal Cyclic Prefix), 8 orthogonal sequences are arranged, among a PHICH group 8 PHICH channels are arranged so.For expansion CP (Extended Cyclic Prefix), 4 orthogonal sequences are arranged, among a PHICH group 4 PHICH channels are arranged so.

For the FDD system, frame structure Class1 namely, PHICH fixes the position in all subframes, and provides by following expression formula:

(1), the N in the formula wherein _g{ 1/6,1/2,1,2} is provided by high level ∈, index n _PHICH ^GroupNumbering be to N from 0 _PHICH ^Group-1.

For the TDD system, namely the frame structure type 2, and the number of PHICH group can be different in each descending sub frame, and pass through m _iN _PHICH ^GroupProvide, wherein m _iProvided N by following table 1 _PHICH ^GroupMake by the expression formula (1) that provides in the top frame structure Class1 and calculate index n _PHICH ^GroupNumbering be to m from 0 _iN _PHICH ^Group-1.

Table 1: m in the frame structure type 2 _iThe definition of the factor

When UE sends upstream data at PUSCH, carry among the PHICH of its feedback information ACK/NACK in descending sub frame.For the PUSCH transmission of dispatching in subframe n, its ACK/NACK feedback information is at subframe n+k _PHICHIn the PHICH resource of correspondence in transmit the k of FDD system wherein _PHICH=4, for the k of TDD system _PHICHProvide by following table 2.

The k of table 2TDD system _PHICHConfiguration

The resource of PHICH channel is that the cyclic shift of the up DMRS (Demodulation Reference signal, demodulated reference signal) of PRB sequence number minimum in the resource according to the PUSCH of the PUSCH schedule information indicating in the DCI form 0 of PDCCH and 3bits indication determines jointly.

The PHICH resource by a parameter to (n _PHICH ^Group, n _PHICH ^Seq) indication, the specific formula for calculation of these two parameters is:

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA}}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS}})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}}$

(2), wherein, n _DMRSThe index value of the DMRS cyclically shifted sequences that uses in the uplink corresponding with PHICH, by bit information mapping in the DMRS territory among the DCI format 0, shown in specific as follows the table 4; N _SF ^PHICHIt is the spreading factor size of the PHICH modulation of definition in 3GPP TS 36.211; I _{PRB_RA} ^Lowest_indexIt is the minimum PRB sequence number of up PUSCH transmission; N _PHICH ^GroupIt is the PHICH group number by the high-level signaling configuration; When TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be that 0, TDD UL/DL configuration mode is as shown in table 3.

Table 3TDD uplink-downlink configuration

Wherein the D in the form represents descendingly, and U represents up, and S represents special subframe, has provided detailed explanation in 3GPP TS36.211.

Table 4n _DMRSBit mapping relation with DMRS territory among the DCI format 0

Cyclic Shift for DMRS Field in DCI format 0 in[4]	n DMRS
		000	0
001	1
		010	2
011	3
		100	4
101	5
		110	6
111	7

In above-mentioned formula, n _PHICH ^SeqWith N _SF ^PHICHPhysical relationship as shown in table 5.

Frequency expansion sequence [the w (0) of table 5PHICH ... w (N _SF ^PHICH-1)]

Yet, considering the simultaneous scene of a plurality of users, may there be the conflict of resource in each user's PHICH.

For example, for the LTE system, be configured to bandwidth 20MHz, have under the condition of 100PRB, Ng=1 is in conventional CP (Normal Cyclic Prefix) situation, if having 4 users, 4 users' I _{PRB_RA} ^Lowest_indexAnd n _DMRSValue is as shown in table 6, and according to the computation rule of existing system, 4 users' PHICH resource all is (1,1), and the conflict of PHICH resource will occur like this.

The example of table 6PHICH resource contention

For the LTE-A system, for supporting the system bandwidth wider than LTE system, such as 100MHz, need be called again member carrier by with a plurality of LTE carrier waves, couple together use, specific implementation has dual mode:

A plurality of continuous LTE carrier waves are carried out polymerization, for LTE-A provides larger transmission bandwidth; A plurality of discontinuous LTE carrier waves are carried out polymerization, for LTE-A provides larger transmission bandwidth.As shown in Figure 1, be the schematic diagram of discontinuous carrier aggregation.Before also do not determine at the PHICH of LTE-A system implementation with, namely the mapping relations of the PHICH between each DL/UL carrier wave are also not definite, if still continue to use define among the present LTE based on parameter to (n _PHICH ^Group, n _PHICH ^Seq) PHICH resource indication, these two parameters are to calculate by the resource allocation information in the PUSCH schedule information that is similar to LTE and DMRS cyclic shift indication information too, there is the problem of PHICH resource contention equally in LTE-A system so in the future.

Therefore be necessary to propose a kind of technical scheme, when needing to a plurality of field feedback in the system, by reasonable distribution PHICH resource, so that a plurality of user resources are shared the problem of a plurality of users' PHICH resource contention in the resolution system.

Summary of the invention

Purpose of the present invention is intended to solve at least the problem of the PHICH resource contention of a plurality of users in one of above-mentioned technological deficiency, particularly resolution system, thereby can be to PHICH resource reasonable distribution, optimization system performance.

In order to achieve the above object, one aspect of the present invention has proposed a kind of method of scheduling of resource of feedback information, it is characterized in that, may further comprise the steps:

Queue order is carried out with the minimum PRB numbering of N user's PUSCH transfer resource in the base station;

Described base station is that the user UE1 of ordering first in the formation selects a DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of user UE1 loading ACK/NACK feedback information;

Other users that described base station is followed successively by in the formation select an index value that is different from previous user's DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of relative users loading ACK/NACK feedback information.

According to embodiments of the invention, the base station is carried out queue order with the minimum PRB numbering of N user's PUSCH transfer resource and is comprised:

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<\&CenterDot;\&CenterDot;\&CenterDot;<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>\&CenterDot;\&CenterDot;\&CenterDot;>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$

Wherein, I _{PRB_RA, j} ^Lowest_indexBe the minimum PRB numbering of j user PUSCH transfer resource, j=1 ..., N.

According to embodiments of the invention, calculate corresponding PHICH resource according to described user's minimum PRB numbering with the index value of DMRS sequence and comprise:

Index value n according to j user's DMRS sequence _{DMRS, j}Minimum PRB numbering I with j user's PUSCH transfer resource _{PRB_RA, j} ^Lowest_indexCalculate the parameter pair of PHICH by formula:

$n_{\mathrm{PHICH},j}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA},j}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},j})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}}$

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupBe the PHICH group number by the high-level signaling configuration, when TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be 0, Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound described parameter pair downwards ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}})$ Indicate the PHICH resource of described correspondence.

According to embodiments of the invention, from the set of available DMRS sequence, select an index value that is different from previous user's DMRS sequence and comprise:

The index value of described user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T) is perhaps from removing n _{DMRS, j '}Outside the index value of DMRS sequence in select at random n wherein _{DMRS, j '}The index value that represents previous user's DMRS sequence, T are the number of available DMRS sequence.

According to embodiments of the invention, when the corresponding PHICH resource that calculates as other users in the PHICH resource corresponding according to described user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, described base station is that described user selects an index value that is different from previous user's DMRS sequence again from the set of available DMRS sequence, and the PHICH resource corresponding with the index value calculating of DMRS sequence according to described user's minimum PRB numbering, until the PHICH resource of described correspondence is different from the PHICH resource of the correspondence that other users calculate in the formation.

According to embodiments of the invention, described base station is that described user selects an index value that is different from previous user's DMRS sequence again and comprises from the set of available DMRS sequence:

The index value of described user's DMRS sequence is taken as

Perhaps from removing

Outside the index value of DMRS sequence in select at random, wherein

The index value of described user's DMRS sequence once before the expression, T are the number of available DMRS sequence.

According to embodiments of the invention, described available DMRS sequence is that 3 bit informations represent.

According to embodiments of the invention, terminal receives the ACK/NACK feedback information in described corresponding PHICH resource.

The present invention has also proposed a kind of base station equipment on the other hand, comprises order module, computing module and resource distribution module,

Described order module is used for the minimum PRB numbering of N user's PUSCH transfer resource is carried out queue order;

Described computing module is used to the index value of the different DMRS sequence of user selection adjacent in the formation, and according to the parameter of described user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ j＝1，…，N；

Described resource distribution module is used for according to described parameter pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ Resource for corresponding user assignment loading ACK/NACK feedback information.

According to embodiments of the invention, described order module is carried out queue order with the minimum PRB numbering of N user's PUSCH transfer resource and is comprised:

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<\&CenterDot;\&CenterDot;\&CenterDot;<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>\&CenterDot;\&CenterDot;\&CenterDot;>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Wherein, I _{PRB_RA, j} ^Lowest_indexIt is the minimum PRB numbering of j user PUSCH transfer resource.

According to embodiments of the invention, described computing module is used to the index value of the different DMRS sequence of user selection adjacent in the formation to comprise:

The index value of a rear user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T) is perhaps from removing n _{DMRS, j '}Outside the index value of DMRS sequence in select at random n wherein _{DMRS, j '}The index value that represents previous user's DMRS sequence, T are the number of available DMRS sequence.

According to embodiments of the invention, described computing module is according to the parameter of described j user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ For:

Calculate by following formula:

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupBe the PHICH group number by the high-level signaling configuration, when TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be 0, Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound downwards.

According to embodiments of the invention, when the corresponding PHICH resource that calculates as other users in the described computing module PHICH resource corresponding according to described user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, described computing module is that described user selects an index value that is different from previous user's DMRS sequence again from the set of available DMRS sequence, and the PHICH resource corresponding with the index value calculating of DMRS sequence according to described user's minimum PRB numbering, until the PHICH resource of described correspondence is different from the PHICH resource of the correspondence that other users calculate in the formation.

According to embodiments of the invention, described computing module is that described user selects an index value that is different from previous user's DMRS sequence again and comprises from the set of available DMRS sequence:

The index value of described user's DMRS sequence is taken as

Perhaps from removing Outside the index value of DMRS sequence in select at random, wherein The index value of described user's DMRS sequence once before the expression, T are the number of available DMRS sequence.

The technical scheme that proposes according to the present invention has solved the problem of a plurality of users' PHICH resource contention in the system, thereby can be to PHICH resource reasonable distribution, optimization system performance.The technique scheme that the present invention proposes goes for existing LTE system, also goes for having more wide band LTE-A system.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

The aspect that the present invention adds and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.

Description of drawings

Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:

Fig. 1 is the schematic diagram of carrier aggregation;

Fig. 2 is the method flow diagram of the scheduling of resource of feedback information;

Fig. 3 is the structural representation of base station equipment.

Embodiment

The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.

For the LTE system, if the same DMRS sequence of all user assignments, the conflict of PHICH resource does not exist so, but can exist larger band to disturb outward for the DMRS sequence between the adjacent user of two resources, thereby affects the performance of demodulation.Therefore, the technical scheme that the present invention proposes is different as much as possible by guaranteeing the DMRS sequence between the adjacent user of two resources, by in resource allocation process so that be assigned to as far as possible different DMRS sequences between the adjacent UE of resource, this will be conducive to improve the demodulation performance of base station end, and utilize technical scheme of the present invention also can avoid the conflict of PHICH resource.In the present invention, a DMRS sequence is corresponding one by one with the index value of a DMRS sequence, and the index value of different DMRS sequences represents different DMRS sequences, and vice versa.

The present invention proposes a kind of method of scheduling of resource of feedback information, may further comprise the steps: queue order is carried out with the minimum PRB numbering of N user's PUSCH transfer resource in the base station; Described base station is that the user UE1 of ordering first in the formation selects a DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of user UE1 loading ACK/NACK feedback information; Other users that described base station is followed successively by in the formation select an index value that is different from previous user's DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of relative users loading ACK/NACK feedback information.

As shown in Figure 2, the method for the scheduling of resource of the feedback information that proposes for the present invention may further comprise the steps:

S101: queue order is carried out to the minimum PRB numbering of user's PUSCH transfer resource in the base station.

In step S101, for fear of existing outside the larger band and disturb for having identical DMRS sequence between the adjacent user of two resources, thereby affect the performance of demodulation, at first sorting to the PUSCH transfer resource of distributing to the user in the base station, carries out queue order by the minimum PRB numbering to the PUSCH transfer resource.

For example, the minimum PRB with each user's PUSCH transfer resource numbers ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<\&CenterDot;\&CenterDot;\&CenterDot;<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

The minimum PRB of each user's PUSCH transfer resource is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>\&CenterDot;\&CenterDot;\&CenterDot;>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Wherein, I _{PRB_RA, i} ^Lowest_indexBe the minimum PRB numbering of user PUSCH transfer resource, j=1 ..., N.

S102: the index value of a DMRS sequence is selected in the base station for the user of ordering first, and calculates corresponding PHICH resource according to this user's minimum PRB numbering with the index value of DMRS sequence.

In step S102, the PHICH resource of the correspondence of first user in the formation is at first calculated in the base station.The base station is calculated corresponding PHICH resource according to this user's minimum PRB numbering with the index value of DMRS sequence, is specially:

Index value n according to this user's DMRS sequence _{DMRS, j}Minimum PRB numbering I with this user's PUSCH transfer resource _{PRB_RA, j} ^Lowest_indexCalculate the parameter pair of PHICH by formula:

$n_{\mathrm{PHICH},j}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA},j}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},j})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}}$

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupBe the PHICH group number by the high-level signaling configuration, when TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be 0,

Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound described parameter pair downwards ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}})$ Indicate the PHICH resource of described correspondence.

S103: other users that the base station is followed successively by in the formation select an index value that is different from the DMRS sequence of previous usefulness corpse, and calculate corresponding PHICH resource according to this user's minimum PRB numbering with the index value of DMRS sequence.

In step S103, other users that the base station is followed successively by in the formation choose suitable DMRS sequence.Different in order to guarantee the DMRS sequence between the adjacent user of two resources, for example, with respect to the index value n of the DMRS sequence of previous user-selected usefulness _{DMRS, j '}, the index value of a rear user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T), wherein T is the number of available DMRS sequence.As other embodiment of the present invention, for example, the index value of a rear user's DMRS sequence can also be (n _{DMRS, j '}+ 2) mod (T), perhaps (n _{DMRS, j '}+ 3) mod (T) obviously, also is applicable to the present invention as long as can guarantee other the different values of DMRS sequence between the adjacent user of two resources, for example from except n _{DMRS, j '}Outside the index value of DMRS sequence in select at random.Thereafter, the base station is calculated corresponding PHICH resource according to described user's minimum PRB numbering with the index value of DMRS sequence, and the formula of calculating is the right computing formula of the parameter of the PHICH among the step S102.

When the corresponding PHICH resource that calculates as other users in the PHICH resource corresponding according to this user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, a DMRS sequence will be chosen again for this user in the base station, recomputate corresponding PHICH resource.For example, with respect to the index value of the DMRS sequence of this user-selected usefulness before be

The index value of the DMRS sequence that the base station will be chosen for this user is Wherein T is the number of available DMRS sequence.As other embodiment of the present invention, for example, the index value of the DMRS sequence that the base station will be chosen for this user can also for

Perhaps

Obviously, this needs still to guarantee that to choosing of the index value of DMRS sequence the DMRS sequence between the adjacent user of two resources is different, for example from removing

Outside the index value of DMRS sequence in select at random.Thereafter the base station is calculated corresponding PHICH resource according to this user's minimum PRB numbering with the index value of DMRS sequence, until the PHICH resource of the correspondence that calculates is different from the PHICH resource of the correspondence that other users calculate in the formation.If travel through all DMRS sequences that does not comprise its Adjacent resource user, the base station is calculated corresponding PHICH resource according to this user's minimum PRB numbering with the index value of DMRS sequence, still identical with the corresponding PHICH resource that calculates of other users in the formation, namely still can not avoid the conflict of PHICH resource, then this user's scheduling failure, the base station will abandon this user is dispatched.

As embodiments of the invention, the DMRS sequence in the said method is as shown in table 3, and namely available DMRS sequence is that 3 bit informations represent.

In order further to set forth the present invention, the below illustrates the judgement flow process that applies the present invention in the concrete system.

The result that the base station reports according to the CQI of each UE, it is used for the resource of PUSCH for each user assignment, suppose that current base station need to dispatch N user, the base station need to be by being scheduling to N user resource allocation so, and the minimum PRB of the PRB resource of each user's PUSCH transmission is numbered I _{PRB_RA, j} ^Lowest_index, j=1 wherein ..., N.I _{PRB_RA, j} ^Lowest_indexExpression be the minimum PRB numbering of resource of j user's PUSCH transmission, differentiation flow process concrete steps are as follows:

The minimum PRB numbering of the resource that the PUSCH that (1) N user is distributed according to resource transmits sorts, and for example the method for ordering is $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}};$

(2) for UE1, the base station can be from the set of 8 DMRS sequences random or acquiescence choose a DMRS sequence as the DMRS of current UE 1, for example can choose the DMRS sequence and be 0 reference sequences, the index value of this DMRS sequence is expressed as n _{DMRS, 1}, according to the I of UE1 _{PRB_RA, 1} ^Lowest_indexAnd n _{DMRS, 1}Calculate the parameter of PHICH of UE1 by following formula to being ${\mathrm{PHICH}}_1=(n_{\mathrm{PHICH},1}^{\mathrm{group}},n_{\mathrm{PHICH},1}^{\mathrm{seq}}),$

$n_{\mathrm{PHICH},1}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},1})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}}$

(3) for UE _j, j=2 ..., N, the base station can be from the set of 8 DMRS sequences random or acquiescence choose a DMRS sequence as current UE _jInterim DMRS, but need to satisfy UE _jIndex value and the UE of DMRS sequence of interim DMRS sequence _J-1The index value n of DMRS sequence _{DMRS, j-1}Difference, for example, a kind of system of selection is that value is n _{DMRS, j-1}+ 1, then ask mould to 8, the index value of this DMRS sequence is expressed as n _{DMRS, j} ^Temp

(4) according to UE _jI _{PRB_RA, j} ^Lowest_indexAnd n _{DMRS, j} ^TempCalculate UE by following formula _jThe parameter of interim PHICH to being ${\mathrm{PHICH}}_j^{\mathrm{Temp}}=(n_{\mathrm{PHICH},j}^{\mathrm{group},\mathrm{Temp}},n_{\mathrm{PHICH},j}^{\mathrm{seq},\mathrm{Temp}}),$

$n_{\mathrm{PHICH},j}^{\mathrm{group},\mathrm{Temp}}=(I_{\mathrm{PRB}\_\mathrm{RA},j}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},j}^{\mathrm{Temp}})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}};$

(5) will ${\mathrm{PHICH}}_j^{\mathrm{Temp}}=(n_{\mathrm{PHICH},j}^{\mathrm{group},\mathrm{Temp}},n_{\mathrm{PHICH},j}^{\mathrm{seq},\mathrm{Temp}})$ Compare one by one with before all users' PHICH resource, all users' PHICH resource description is PHICH before _m, 1≤m≤j-1 wherein;

(5.1) if ${\mathrm{PHICH}}_j^{\mathrm{Temp}}={\mathrm{PHICH}}_m,$ Resource contention occurs in expression, and then the index value of choosing a DMRS sequence of random in the set of remaining DMRS sequence or acquiescence is as current interim n _{DMRS, j} ^Temp, for example, system of selection is that value is $n_{\mathrm{DMRS},j}^{\mathrm{Temp}}=n_{\mathrm{DMRS},j}^{\mathrm{Temp}}+1,$ Then ask mould to 8, and turn back in the step (3) and calculate; If traveling through all DMRS sequences that do not comprise is n _{DMRS, j-1}DMRS set in other DMRS sequence, still can not avoid the conflict of PHICH resource, then this user's scheduling failure, the base station abandons this user is dispatched;

(5.2) if ${\mathrm{PHICH}}_j^{\mathrm{Temp}}\&NotEqual;{\mathrm{PHICH}}_m,$ Resource contention does not occur in expression, then ${\mathrm{PHICH}}_j={\mathrm{PHICH}}_j^{\mathrm{Temp}},$ And $n_{\mathrm{DMRS},j}=n_{\mathrm{DMRS},j}^{\mathrm{Temp}};$

(6) j=j+1 turns back in the step (3) next user is carried out the selection of DMRS sequence;

(7) until N UE finishes the deterministic process that the PHICH resource allocation conflict is avoided.

Correspondingly, terminal receives the ACK/NACK feedback information in the corresponding PHICH resource of determining according to said method.For example, for the PUSCH transmission of dispatching in subframe n, terminal is at subframe n+k _PHICHIn the PHICH transfer resource of correspondence in receive the ACK/NACK feedback information, the introduction of concrete computational process reference background technology part, after determining corresponding carrying subframe, terminal receives the ACK/NACK feedback information according to the scheme of above-mentioned Resources allocation in corresponding PHICH resource.

The said method that the present invention proposes has solved the problem of a plurality of users' PHICH resource contention in the system, thereby can be to PHICH resource reasonable distribution, optimization system performance.The said method that the present invention proposes goes for existing LTE system, also goes for having more wide band LTE-A system.In addition, the said method that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

As shown in Figure 3, the present invention has also proposed a kind of base station 100 on the other hand, comprises order module 110, computing module 120 and resource distribution module 130.

Wherein, order module 110 is used for minimum PRB with N user's PUSCH transfer resource and numbers and carry out queue order; Computing module 120 is used to the index value of the different DMRS sequence of user selection adjacent in the formation, and according to the parameter of user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ J=1 ..., N; Resource distribution module 130 is used for according to parameter pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ Resource for corresponding user assignment loading ACK/NACK feedback information.

As the embodiment of the said equipment, order module 110 is carried out queue order with the minimum PRB numbering of N user's PUSCH transfer resource and is comprised:

Minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<\&CenterDot;\&CenterDot;\&CenterDot;<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

Minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>\&CenterDot;\&CenterDot;\&CenterDot;>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Wherein, I _{PRB_RA, j} ^Lowest_indexMinimum PRB numbering for user PUSCH transfer resource.

As the embodiment of the said equipment, computing module 120 is used to the index value of the different DMRS sequence of user selection adjacent in the formation to comprise:

The index value of a rear user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T) is perhaps from removing n _{DMRS, j '}Outside the index value of DMRS sequence in select at random n wherein _{DMRS, j '}The index value that represents previous user's DMRS sequence, T are the number of available DMRS sequence.

As the embodiment of the said equipment, computing module 120 is according to the parameter of user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}})$ For:

Calculate by following formula:

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupBe the PHICH group number by the high-level signaling configuration, when TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be 0,

Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound downwards.

Embodiment as the said equipment, when the corresponding PHICH resource that calculates as other users in the computing module 120 PHICH resource corresponding according to user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, computing module 120 is selected an index value that is different from previous user's DMRS sequence again for the user from the set of available DMRS sequence, and the PHICH resource corresponding with the index value calculating of DMRS sequence according to user's minimum PRB numbering, until corresponding PHICH resource is different from the PHICH resource of the correspondence that other users calculate in the formation.

As the embodiment of the said equipment, computing module 120 comprises for the user selects an index value that is different from previous user's DMRS sequence again from the set of available DMRS sequence:

The index value of user's DMRS sequence is taken as

Perhaps from removing Outside the index value of DMRS sequence in select at random, wherein

The index value that represents a front user's DMRS sequence, T are the number of available DMRS sequence.

The said equipment that the present invention proposes has solved the problem of a plurality of users' PHICH resource contention in the system, thereby can be to PHICH resource reasonable distribution, optimization system performance.The said equipment that the present invention proposes goes for existing LTE system, also goes for having more wide band LTE-A system.In addition, the said equipment that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (14)

1. the method for the scheduling of resource of a feedback information is characterized in that, may further comprise the steps:

Queue order is carried out with the minimum PRB numbering of N user's PUSCH transfer resource in the base station;

Described base station is that the user UE1 of ordering first in the formation selects a DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of user UE1 loading ACK/NACK feedback information;

Other users that described base station is followed successively by in the formation select an index value that is different from previous user's DMRS sequence from the set of available DMRS sequence, minimum PRB numbering according to described user is calculated corresponding PHICH resource with the index value of DMRS sequence, and described corresponding PHICH resource is the resource of relative users loading ACK/NACK feedback information.

2. the method for the scheduling of resource of feedback information as claimed in claim 1 is characterized in that, the base station is carried out queue order with the minimum PRB numbering of N user's PUSCH transfer resource and comprised:

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<...<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>...>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Wherein, I _{PRB_RA, j} ^Lowest_indexBe the minimum PRB numbering of j user PUSCH transfer resource, j=1 ..., N.

3. the method for the scheduling of resource of feedback information as claimed in claim 2 is characterized in that, calculates corresponding PHICH resource according to described user's minimum PRB numbering with the index value of DMRS sequence and comprises:

Index value n according to j user's DMRS sequence _{DMRS, j}Minimum PRB numbering I with j user's PUSCH transfer resource _{PRB_RA, j} ^Lowest_indexCalculate the parameter pair of PHICH by formula:

$n_{\mathrm{PHICH},j}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA},j}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},j})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}},$

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupBe the PHICH group number by the high-level signaling configuration, when TDD UL/DL is configured to 0 pattern and PUSCH in subframe 4 or 9 carrying, I _PHICHBe 1, otherwise be 0,

Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound described parameter pair downwards ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}})$ Indicate the PHICH resource of described correspondence.

4. the method for the scheduling of resource of feedback information as claimed in claim 3 is characterized in that, selects an index value that is different from previous user's DMRS sequence and comprise from the set of available DMRS sequence:

The index value of described user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T) is perhaps from removing n _{DMRS, j '}Outside the index value of DMRS sequence in select at random n wherein _{DMRS, j '}The index value that represents previous user's DMRS sequence, T are the number of available DMRS sequence.

5. the method for the scheduling of resource of feedback information as claimed in claim 4, it is characterized in that, when the corresponding PHICH resource that calculates as other users in the PHICH resource corresponding according to described user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, described base station is that described user selects an index value that is different from previous user's DMRS sequence again from the set of available DMRS sequence, and the PHICH resource corresponding with the index value calculating of DMRS sequence according to described user's minimum PRB numbering, until the PHICH resource of described correspondence is different from the PHICH resource of the correspondence that other users calculate in the formation.

6. the method for the scheduling of resource of feedback information as claimed in claim 5 is characterized in that, described base station is that described user selects an index value that is different from previous user's DMRS sequence again and comprises from the set of available DMRS sequence:

The index value of described user's DMRS sequence is taken as Perhaps from removing

Outside the index value of DMRS sequence in select at random, wherein

The index value of described user's DMRS sequence once before the expression, T are the number of available DMRS sequence.

7. the method for the scheduling of resource of feedback information as claimed in claim 1 is characterized in that, described available DMRS sequence is that 3 bit informations represent.

8. such as the method for the scheduling of resource of one of any described feedback information of claim 1 to 7, it is characterized in that, terminal receives the ACK/NACK feedback information in described corresponding PHICH resource.

9. a base station equipment is characterized in that, comprises order module, computing module and resource distribution module,

Described order module is used for the minimum PRB numbering of N user's PUSCH transfer resource is carried out queue order;

Described computing module is used to the index value of the different DMRS sequence of user selection adjacent in the formation, and according to the parameter of described user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ j＝1，…，N；

Described resource distribution module is used for according to described parameter pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}}),$ Resource for corresponding user assignment loading ACK/NACK feedback information.

10. base station equipment as claimed in claim 9 is characterized in that, described order module is carried out queue order with the minimum PRB numbering of N user's PUSCH transfer resource and comprised:

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}<I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}<...<I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Perhaps

Described minimum PRB is numbered ascending ordering: $I_{\mathrm{PRB}\_\mathrm{RA},1}^{\mathrm{lowest}\_\mathrm{index}}>I_{\mathrm{PRB}\_\mathrm{RA},2}^{\mathrm{lowest}\_\mathrm{index}}>...>I_{\mathrm{PRB}\_\mathrm{RA},N}^{\mathrm{lowest}\_\mathrm{index}},$ Wherein, I _{PRB_RA, j} ^Lowest_indexIt is the minimum PRB numbering that j user PUSCH passes the elm resource.

11. base station equipment as claimed in claim 10 is characterized in that, described computing module is used to the index value of the different DMRS sequence of user selection adjacent in the formation to comprise:

The index value of a rear user's DMRS sequence is taken as (n _{DMRS, j '}+ 1) mod (T) is perhaps from removing n _{DMRS, j '}Outside the index value of DMRS sequence in select at random n wherein _{DMRS, j '}The index value that represents previous user's DMRS sequence, T are the number of available DMRS sequence.

12. base station equipment as claimed in claim 11 is characterized in that, described computing module is according to the parameter of described j user's the minimum PRB numbering PHICH corresponding with the index value calculating of DMRS sequence pair ${\mathrm{PHICH}}_j=(n_{\mathrm{PHICH},j}^{\mathrm{group}},n_{\mathrm{PHICH},j}^{\mathrm{seq}})$ For:

Calculate by following formula:

$n_{\mathrm{PHICH},j}^{\mathrm{group}}=(I_{\mathrm{PRB}\_\mathrm{RA},j}^{\mathrm{lowest}\_\mathrm{index}}+n_{\mathrm{DMRS},j})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}{N}_{\mathrm{PHICH}}^{\mathrm{group}}$

N wherein _SF ^PHICHBe the spreading factor size of PHICH modulation, N _PHICH ^GroupThe serve as reasons PHICH group number of the modern configuration of high-rise letter is when TDD UL/DL is configured to 0 pattern and PUSCH when giving frame 4 or 9 carrying, I _PHICHBe 1, otherwise be 0,

Expression is to I _{PRB_RA, j} ^Lowest_index/ N _PHICH ^GroupRound downwards.

13. base station equipment as claimed in claim 12, it is characterized in that, when the corresponding PHICH resource that calculates as other users in the described computing module PHICH resource corresponding according to described user's minimum PRB numbering and the index value calculating of DMRS sequence and the formation is identical, described computing module is that described user selects an index value that is different from previous user's DMRS sequence again from the set of available DMRS sequence, and the PHICH resource corresponding with the index value calculating of DMRS sequence according to described user's minimum PRB numbering, until the PHICH resource of described correspondence is different from the PHICH resource of the correspondence that other users calculate in the formation.

14. base station equipment as claimed in claim 13 is characterized in that, described computing module is that described user selects an index value that is different from previous user's DMRS sequence again and comprises from the set of available DMRS sequence:

The index value of described user's DMRS sequence is taken as

Perhaps from removing

Outside the index value of DMRS sequence in select at random, wherein

The index value of described user's DMRS sequence once before the expression, T are the number of available DMRS sequence.

Images