CN102882663A - Method for transmitting and receiving downlink physical HARQ (Hybrid Automatic Repeat Request) indication, user equipment and base station - Google Patents

Abstract

The invention provides a method for transmitting a downlink physical HARQ (Hybrid Automatic Repeat Request) indication, which comprises the following steps of: modulating the downlink physical HARQ indication to be a modulating symbol; generating an HARQ indication signal based on the modulating symbol, wherein the HARQ indication signal is demodulated based on the User Equipment (UE) specific reference signal; and transmitting the HARQ indication signal by means of an antenna port. The invention also provides a method for receiving a downlink physical HARQ indication, a base station and user equipment.

Description

Method of sending and receiving, subscriber equipment and the base station of downlink physical HARQ indication

Technical field

The present invention relates to communication technical field, more specifically, relate to a kind of method of sending and receiving, subscriber equipment and base station of downlink physical HARQ indication.

Background technology

3GPP (3G (Third Generation) Moblie partner plan) tissue is the international organization in the moving communicating field, and it is played an important role in the standardization effort of 3G cellular telecommunication art.The 3GPP tissue designs EUTRA (universal mobile telecommunications system of evolution and the access of continental rise radio) and EUTRAN (the universal mobile telecommunications system net of evolution and continental rise radio access network) since the second half year in 2004, this project is also referred to as LTE (Long Term Evolution is called again LTE Rel-8) project.In April, 2008,3GPP is organized in the China Shenzhen meeting, begins to inquire into the standardization effort (be called as at present the LTE-A system, be called again LTE Rel-10) of 4G cellular communication system.The standardization effort of LTE Rel-10 RAN1 was finished in March, 2011.Simultaneously, the research contents of LTE Rel-11 RAN 1 that the 51st meeting of 3GPP RAN is clear and definite, wherein the Enhancement Technology of descending control signaling is suggested (RP-101425, Revised SID Proposal:Coordinated Multi-pointOperation for LTE, Samsung).Its background is the transformation that LTE Rel-10 has finished the reference signal that PDSCH (Physical Downlink Shared Channel) transmission relies on, namely by the transformation of public reference signal to subscriber equipment (UE) specific reference signals.The UE specific reference signals is the signal that is exclusively used in UE, is used for helping UE demodulation of downlink data.Yet, be that the specific control signal of UE such as PDCCH (Physical Downlink Control Channel) and PHICH (physical hybrid automatic repeat request indicator channel) still rely on public reference signal and carry out demodulation equally, therefore greatly limited the flexibility of the use of these control channels.In addition, in CoMP (collaboration type multicast communication) and heterogeneous network framework, will more use MBSFN (Multicast Broadcast Single Frequency Network) frame.Owing in such subframe, only have at most two OFDM (OFDM) symbol can be allocated for the transmission of control channel, so the capacity of control signal will be subject to larger restriction.For increasing and strengthen capacity and the covering of control signal, some technology of original PDSCH of being mainly used in such as CoMP, MU-MIMO (multiuser MIMO) and beam forming technology also are applied to the transmission (R1-110649 of PDCCH/PHICH, Aspects on Distributed RRUs withShared Cell-ID for Heterogeneous Deployments, Ericsson, ST-Ericsson).This just requires to introduce into these control signals the support of UE specific reference signals.In addition, can easily feasible region division gain in a shared residential quarter ID network architecture based on the PDCCH/PHICH of UE specific reference signals demodulation.

For supporting relaying technique, LTE Rel-10 has designed (36.216, the Evolved Universal Terrestrial Radio Access (E-UTRA) based on the relaying PDCCH of UE specific reference signals demodulation; Physical layer for relaying operation, V10.2.0,3GPP), be called again R-PDCCH.Most of design principle here can be used to design the wider PDCCH based on the demodulation of UE specific reference signals of applicable surface, is called again ePDCCH.

Yet in present standardization was discussed, still not existing method was in order to realize downlink physical mixed automatic retransfer request (HARQ) indication based on the demodulation of UE specific reference signals, and this problem has consisted of main research of the present invention.

Summary of the invention

The object of the invention is to for the problem that how to realize based on the downlink physical HARQ indication of UE specific reference signals demodulation, a kind of method of sending and receiving, subscriber equipment and base station of downlink physical HARQ indication of novelty are provided, have filled up the blank of existing standard.

According to the first scheme of the present invention, a kind of method that sends downlink physical mixed automatic retransfer request HARQ indication is provided, may further comprise the steps: downlink physical HARQ indication is modulated to modulation symbol; Produce the HARQ index signal based on described modulation symbol, described HARQ index signal will be come demodulation based on the user equipment (UE) specific reference signals; And utilize antenna port to send the HARQ index signal.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And the step that produces the HARQ index signal comprises: described modulation symbol be multiply by one of two groups of UE specific reference signals corresponding with described antenna port, to produce described HARQ index signal.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals transmitted in a plurality of subcarrier in frequency domain, and comprises two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And the step that produces the HARQ index signal comprises: described modulation symbol be multiply by the two group UE specific reference signals corresponding with described antenna port, produce described HARQ index signal.

Preferably, the step that produces the HARQ index signal comprises: described modulation symbol is mapped to the data resource unit that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.

Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, before downlink physical HARQ indication was modulated to modulation symbol, described method also comprised: the number of determining to be used in each Resource Block the data resource unit of transmission downlink physical HARQ indication.

Preferably, the number that is used for the data resource unit of transmission downlink physical HARQ indication in each Resource Block is to determine according to the bit number that the uplink scheduling corresponding with downlink physical HARQ indication transmits employed resource block number and downlink physical HARQ indication.

Preferably, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, the number of the data resource unit of indicating for transmission downlink physical HARQ in each Resource Block is that the not number of coded bits according to each Resource Unit transmission of PDSCH, bit number and the adjusting parameter that downlink physical HARQ indicates are determined.

According to another aspect of the present invention, provide a kind of base station, having comprised: modulating unit is modulated to modulation symbol with downlink physical mixed automatic retransfer request HARQ indication; The signal generation unit, the modulation symbol of modulating based on modulating unit produces the HARQ index signal, and described HARQ index signal will be come demodulation based on the user equipment (UE) specific reference signals; And transmitting element, the HARQ index signal of utilizing antenna port to come the transmitted signal generation unit to produce.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And described signal generation unit is configured to: the modulation symbol of modulating unit modulation be multiply by one of two groups of UE specific reference signals corresponding with described antenna port, to produce described HARQ index signal.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals transmitted in a plurality of subcarrier in frequency domain, and comprises two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And described signal generation unit is configured to: the modulation symbol of modulating unit modulation be multiply by the two group UE specific reference signals corresponding with described antenna port, produce described HARQ index signal.

Preferably, described signal generation unit is configured to: described modulation symbol is mapped to the data resource unit that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.

Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, described base station also comprises: determining unit, determine in each Resource Block to be used for the number of the data resource unit of transmission downlink physical HARQ indication.

Preferably, described determining unit is configured to determine to be used in each Resource Block according to the bit number that the uplink scheduling corresponding with downlink physical HARQ indication transmits employed resource block number and downlink physical HARQ indication the number of the data resource unit that transmission downlink physical HARQ indicates.

Preferably, described determining unit is configured to, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, according to the bit number of the not number of coded bits of each Resource Unit transmission among the PDSCH, downlink physical HARQ indication with regulate the number that parameter determines to be used in each Resource Block the data resource unit that transmission downlink physical HARQ indicates.

According to another aspect of the present invention, provide a kind of method that receives downlink physical mixed automatic retransfer request HARQ indication, may further comprise the steps: receive the user equipment (UE) specific reference signals from antenna port; Obtain the HARQ index signal, indication produces described HARQ index signal based on downlink physical HARQ; And come demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; The step that obtains the HARQ index signal comprises: the signal in the Resource Unit that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal; The step of demodulation HARQ index signal comprises: utilize the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; The step that obtains the HARQ index signal comprises: the signal in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal; The step of demodulation HARQ index signal comprises: utilize two groups of UE specific reference signals that receive from another antenna port that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.

Preferably, the step of acquisition HARQ index signal comprises: come to obtain the data resource unit of demodulation the HARQ index signal from utilizing the UE specific reference signals.

Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, the step of demodulation HARQ index signal comprises: come demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

According to another aspect of the present invention, provide a kind of user equipment (UE), having comprised: receiving element receives the UE specific reference signals from antenna port; The signal acquisition unit obtains mixed automatic retransfer request HARQ index signal, and indication produces described HARQ index signal based on downlink physical HARQ; And demodulating unit, come demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; Described signal acquisition unit is configured to: the signal in the Resource Unit that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal; Described demodulating unit is configured to: utilize the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.

Preferably, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; Described signal acquisition unit is configured to: the signal in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal; Described demodulating unit is configured to: utilize two groups of UE specific reference signals that receive from another antenna port that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.

Preferably, described signal acquisition unit is configured to: come to obtain the data resource unit of demodulation the HARQ index signal from utilizing the UE specific reference signals.

Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, described demodulating unit is configured to: also come demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

According to another aspect of the present invention, provide a kind of method for sending downlink physical mixed automatic retransfer request HARQ indication, may further comprise the steps: indicate to produce the HARQ index signal based on downlink physical HARQ; And utilize Resource Block RB and antenna port to send the HARQ index signal, wherein, the RB that is used for the transmitting HARQ index signal comprises uplink scheduling transmission employed first RB corresponding with the HARQ index signal, and the antenna port that is used for the transmitting HARQ index signal comprises that the uplink scheduling corresponding with the HARQ index signal transmits employed antenna port.

Preferably, the antenna port for the transmitting HARQ index signal also comprises the additional antenna port.

Description of drawings

By below in conjunction with description of drawings the preferred embodiments of the present invention, will make of the present invention above-mentioned and other objects, features and advantages are clearer, wherein:

Fig. 1 shows under the common CP pattern, the resource mapping of descending UE specific reference signals;

Fig. 2 shows under the expansion CP pattern, the resource mapping of descending UE specific reference signals;

The schematic diagram of downlink physical HARQ indication when Fig. 3 shows the single Serving cell of up configuration;

The schematic diagram of downlink physical HARQ indication when Fig. 4 shows a plurality of Serving cell of up configuration, the method for downlink physical HARQ indication extended to each Serving cell simply when the downlink physical HARQ that wherein PUSCH in each Serving cell is corresponding indicated according to the single Serving cell of up configuration;

The schematic diagram of downlink physical HARQ indication when Fig. 5 shows a plurality of Serving cell of up configuration, the downlink physical HARQ indication combined coding that wherein PUSCH in a plurality of Serving cells is corresponding;

Fig. 6 shows the block diagram according to the base station of the embodiment of the invention;

Fig. 7 shows the block diagram of the subscriber equipment (UE) according to the embodiment of the invention;

Fig. 8 shows a kind of method of the UE of generation specific reference signals;

Fig. 9 shows the method for the another kind of UE of generation specific reference signals;

Figure 10 shows a kind of method of transfer resource of definite downlink physical HARQ indication;

Figure 11 shows a kind of method that modulation symbol is mapped to data RE;

Figure 12 shows the flow chart according to the method that is used for transmission downlink physical HARQ indication of the embodiment of the invention; And

Figure 13 shows the flow chart according to the method that is used for reception downlink physical HARQ indication of the embodiment of the invention.

Embodiment

To a preferred embodiment of the present invention will be described in detail, having omitted in the description process is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent that the understanding of the present invention from causing.

At length set forth performing step of the present invention for clear, the below provides some specific embodiments of the invention, is applicable to LTE-A (Rel-10, Rel-11 and later version) cellular communication system.Need to prove, the invention is not restricted to the application described in the embodiment, but applicable to other communication systems, such as 5G system from now on.

Before describing principle of the present invention, the resource mapping of UE specific reference signals is described at first.Fig. 1 shows under general cyclic prefix (CP) pattern, and the resource mapping of descending UE specific reference signals is (referring to 36.211, Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation, V10.1.0,3GPP).In Fig. 1, each 12 * 14 square represents a pair of Resource Block (RB), each element representation Resource Unit (RE) wherein, and transverse axis represents time slot, the longitudinal axis represents frequency (subcarrier).As can be seen from the figure, under the common CP pattern, antenna port 7～10 (is expressed as R ₇, R ₈, R ₉, R ₁₀) on time domain, all have two groups of UE specific reference signals.In the present invention, as skilled in the art to understand, term " antenna port " is the concept corresponding with data Layer, and does not rely on the configuration of actual physics antenna.Every group of UE specific reference signals transmitted (shown in Fig. 1 3) in a plurality of subcarrier in frequency domain, and comprise that each subcarrier in frequency domain frequency domain position is identical, two continuous RE before and after the time-domain position.

Express with mathematical linguistics, under the common CP pattern, be positioned at the complex symbol of UE specific reference signals of p antenna port of time-frequency position (l, k) (wherein time-domain position l and frequency domain position k are respectively take OFDM symbol and subcarrier as unit)

For (referring to 36.211, EvolvedUniversal Terrestrial Radio Access (E-UTRA); Physical Channels andModulation, V10.1.0,3GPP):

$a_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)\·r(3\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+3\·n_{\mathrm{PRB}}+m^{\′})---\left(1\right)$

Wherein,

$w_p\left(i\right)=\left\{\begin{array}{cc}{\stackrel{\‾}{w}}_p\left(i\right),& (m^{\′}+n_{\mathrm{PRB}})\mathrm{mod}2=0\\ {\stackrel{\‾}{w}}_p(3-i),& (m^{\′}+n_{\mathrm{PRB}})\mathrm{mod}2=1\end{array}\right.$

$k=5m^{\′}+{N_{\mathrm{sc}}^{\mathrm{RB}}n}_{\mathrm{PRB}}+k^{\′}$

$k^{\′}=\left\{\begin{array}{cc}1,& p\∈\left\{\mathrm{7,8}\right\}\\ 0,& p\∈\left\{\mathrm{9,10}\right\}\end{array}\right.$

m′＝0，1，2

Variable w wherein _p(i) by Derive, Be the orthogonal sequence (referring to 3GPP agreement 36.211, table 6.10.3.2-1) of distinguishing the different antennae port, r () is the known reference signal sequence (referring to 36.211,6.10.3.1 joint) of definition in the 3GPP agreement 36.211, Be frequency domain RB size (take subcarrier as unit),

For the maximum downstream band width configuration (with

Be unit), n _PRBBe physics RB numbering.

Fig. 2 shows under the expansion CP pattern, the resource mapping of descending UE specific reference signals.As can be seen from the figure, expanding under the CP, is 1,2,3,5 or 6 special subframe for time division duplex (TDD) uplink-downlink configuration scheme, and antenna port 7～8 only has respectively one group of UE specific reference signals; In every other descending sub frame, antenna port 7～8 has respectively two groups of UE specific reference signals to be distributed in two time slots, the subcarrier in frequency domain but frequency domain position staggers.

Express with mathematical linguistics, under expansion CP pattern, be positioned at the complex symbol of UE specific reference signals of p antenna port of time-frequency position (l, k) For (referring to 36.211, EvolvedUniversal Terrestrial Radio Access (E-UTRA); Physical Channels andModulation, V10.1.0,3GPP):

$a_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)\·r(3\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+4\·n_{\mathrm{PRB}}+m^{\′})---\left(2\right)$

Wherein, continue to use symbol implication in the above-mentioned formula (1):

$w_p\left(i\right)=\left\{\begin{array}{cc}{\stackrel{\‾}{w}}_p\left(i\right)& m^{\′}\mathrm{mod}2=0\\ {\stackrel{\‾}{w}}_p(1-i)& m^{\′}\mathrm{mod}2=1\end{array}\right.$

$k=3m^{\′}+{N_{\mathrm{sc}}^{\mathrm{RB}}n}_{\mathrm{PRB}}+k^{\′}$

l＝l′mod2+4

m′＝0，1，2，3

Wherein

Be the orthogonal sequence (referring to 3GPP agreement 36.211, table 6.10.3.2-2) of distinguishing the different antennae port

The schematic diagram of downlink physical HARQ indication when Fig. 3 to Fig. 5 shows respectively the single Serving cell of up configuration and a plurality of Serving cell.Fdd mode in Fig. 3 is as example, the basic process that configures the transmitting uplink data of single Serving cell comprises the scheduling of upstream data (PDCCH), transmission (the PUSCH of upstream data, Physical Uplink Shared Channel) and descending HARQ indication (feedback of ACK/NACK), wherein the resource of descending HARQ indication is in the descending Serving cell of transmission uplink scheduling, and corresponding with first physics RB of up PUSCH.Can find out from Fig. 4 and Fig. 5, during a plurality of Serving cell of up configuration, the downlink physical HARQ indication that the PUSCH in each Serving cell is corresponding can be promoted (Fig. 4) simply according to the method for Fig. 3; Also the PUSCH in a plurality of Serving cells can be indicated combined coding (Fig. 5) by corresponding downlink physical HARQ.

Referring to accompanying drawing example embodiment of the present invention is described.

Fig. 6 shows the block diagram according to the base station 100 of the embodiment of the invention.Base station 100 comprises: modulating unit 110, signal generation unit 120 and transmitting element 130.Preferably, base station 100 can also comprise the determining unit (not shown).It will be understood by those skilled in the art that base station 100 also comprises necessary other functional units of its function of realization, such as processor, memory etc.

Fig. 7 shows the block diagram of the subscriber equipment (UE) 200 according to the embodiment of the invention.UE 200 comprises: receiving element 210, signal acquisition unit 220 and demodulating unit 230.

Referring to Fig. 6 and Fig. 7, concrete function and the operation of each assembly of base station 100 and UE 200 are described by specific embodiment.

[the first embodiment]

According to the present embodiment, the modulating unit 110 of base station 100 is configured to, and downlink physical HARQ indication is modulated to modulation symbol.

For example, when the single Serving cell of up configuration, downlink physical HARQ instruction content is the HARQ ACK/NACK of 1 or 2 bits, and whether 1 or 2 transmission block that is used to indicate up PUSCH is correctly received by the base station.The information of these 1 or 2 bits can be modulation symbol by example modulation as shown in table 1.It will be understood by those skilled in the art that the modulation mapping shown in the table 1 only is preferred exemplary, can shine upon to realize the present invention with any modulation, as long as base station 100 and UE 200 all know employed modulation mapping.

Table 1-downlink physical HARQ indication modulation scheme

B in the table (0), b (1) expression downlink physical HARQ indication, the modulation symbol that d obtains after representing to modulate.

The signal generation unit 120 of base station 100 is configured to, and the modulation symbol of modulating based on modulating unit 110 produces the HARQ index signal, and described HARQ index signal will be come demodulation based on the UE specific reference signals.

Here, as mentioned above (Fig. 1 and 2), (remove TDD uplink-downlink configuration scheme 1 for common CP pattern and expansion CP pattern, 2,3,5 or 6 special subframe is outer), antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units (RE) that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous.

Two kinds of schemes that produce the HARQ index signal are below described.

(the HARQ index signal produces scheme 1)

As shown in Figure 8, according to scheme 1, signal generation unit 120 is configured to: the modulation symbol d of modulating unit 110 modulation be multiply by one of two groups of UE specific reference signals corresponding with antenna port (the shade RE among the figure shown in the dotted line), to produce the HARQ index signal.

For example, under the common CP pattern, be positioned at the UE specific reference signals of p antenna port of time-frequency position (l, k) and the complex symbol that above-mentioned modulation symbol multiplies each other and obtains

For:

${\hat{a}}_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)z\left(l^{\′}\right)r(3\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+3\·n_{\mathrm{PRB}}+m^{\′})---\left(3\right)$

Wherein, the symbol implication in continuing to use above-mentioned formula (1), l '=0,1 o'clock, z (l ')=1; L '=2,3 o'clock, z (l ')=d.

Again for example, under expansion CP pattern (except the special subframe of TDD uplink- downlink configuration scheme 1,2,3,5 or 6 outer), be positioned at the UE specific reference signals of p antenna port of time-frequency position (l, k) and the complex symbol that above-mentioned modulation symbol multiplies each other and obtains

For:

${\hat{a}}_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)z\left(l^{\′}\right)r(4\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+4\·n_{\mathrm{PRB}}+m^{\′})---\left(4\right)$

Wherein, the symbol implication in continuing to use above-mentioned formula (1), l '=0,1 and during for the even number time slot, z (l ')=1; L '=0,1 and during for the odd number time slot, z (l ')=d.

In this programme 1, in two groups of UE specific reference signals corresponding with antenna port, thereby one group of carrying HARQ indication becomes the HARQ index signal, thereby another group is not carried the HARQ indication and still is original UE specific reference signals.

(the HARQ index signal produces scheme 2)

As shown in Figure 9, according to scheme 2, signal generation unit 120 is configured to: the modulation symbol d of modulating unit 110 modulation be multiply by the two group UE specific reference signals corresponding with antenna port (the shade RE among the figure shown in the dotted line), produce described HARQ index signal.

For example, under the common CP pattern, be positioned at the UE specific reference signals of p antenna port of time-frequency position (l, k) and the complex symbol that above-mentioned modulation symbol multiplies each other and obtains For:

${\hat{a}}_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)z\left(l^{\′}\right)r(3\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+3\·n_{\mathrm{PRB}}+m^{\′})---\left(5\right)$

Wherein, the symbol implication in continuing to use above-mentioned formula (1), z (l ')=d.

Again for example, under expansion CP pattern (except the special subframe of TDD uplink- downlink configuration scheme 1,2,3,5 or 6 outer), be positioned at the UE specific reference signals of p antenna port of time-frequency position (l, k) and the complex symbol that above-mentioned modulation symbol multiplies each other and obtains

For:

${\hat{a}}_{k,l}^{\left(p\right)}=w_p\left(l^{\′}\right)z\left(l^{\′}\right)r(4\·l^{\′}\·N_{\mathrm{RB}}^{\max ,\mathrm{DL}}+4\·n_{\mathrm{PRB}}+m^{\′})---\left(6\right)$

Wherein, the symbol implication in continuing to use above-mentioned formula (1), z (l ')=d.

In this programme 2, indication becomes the HARQ index signal thereby two groups of UE specific reference signals corresponding with antenna port are all carried HARQ.

The transmitting element 130 of base station 100 is configured to, the HARQ index signal of utilizing antenna port to come transmitted signal generation unit 120 to produce.

On the other hand, the receiving element 210 of UE 200 is configured to, and receives the UE specific reference signals from antenna port.The signal acquisition unit 220 of UE 200 is configured to, and obtains the HARQ index signal.As mentioned above, the HARQ index signal is based on downlink physical HARQ indication generation.The demodulating unit 230 of UE 200 is configured to, and comes demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

In an exemplary scenario, the HARQ index signal that base station 100 produces (in the present embodiment, the HARQ index signal is transmitted in the RE of UE specific reference signals) in transfer resource (Resource Block (RB) and the antenna port) transmission of UE 200 and base station 100 agreements, wherein the number of RB resource is preferably 1.For example, base station 100 can will be notified to UE 200 for RB sequence number and the antenna port sequence number of transmitting HARQ index signal by semi-static signaling, and wherein the antenna port number is 1 in the scheme 1, and the antenna port number is 2 in the scheme 2.

Alternatively, as shown in figure 10, suppose to take RB n based on the uplink scheduling PDCCH (ePDCCH) of UE specific reference signals demodulation, n+1, ..., n+x (n wherein, n+1, ..., n+x is the index of RB) transmission, and the transmission antenna port be p, then the transmitting element 130 of base station 100 can transmit (scheme 1) at RB n and antenna port p with the HARQ index signal corresponding with this uplink scheduling, perhaps the transmitting element 130 of base station 100 can with the HARQ index signal corresponding with this uplink scheduling at RB n and antenna port p, transmit (scheme 2) on the p+1.In other words, for such scheme 1, the RB that is used for the transmitting HARQ index signal can be uplink scheduling transmission employed first RB corresponding with the HARQ index signal, and the antenna port that is used for the transmitting HARQ index signal can be that the uplink scheduling corresponding with the HARQ index signal transmits employed antenna port; For such scheme 2, the RB that is used for the transmitting HARQ index signal can be uplink scheduling transmission employed first RB corresponding with the HARQ index signal, and the antenna port that is used for the transmitting HARQ index signal can be that the uplink scheduling corresponding with the HARQ index signal transmits employed antenna port and additional antenna port.By the RB of this selection HARQ index signal transmission and the method for antenna port, be conducive to guarantee the reliability of HARQ index signal transmission, because the base station will select the RB of better channel conditions and antenna port to transmit uplink scheduling, temporal correlation according to channel, when the transmitting HARQ index signal, the channel conditions of these RB and antenna port is still better.

Therefore, UE 200 (being specially signal acquisition unit 220) can according to agreement or the above-mentioned Resource Allocation Formula of base station 100, receive the HARQ index signal by the resource (RB and antenna port) that is used for the transmitting HARQ index signal, to detect downlink physical HARQ indication.

Particularly, for utilizing above-mentioned HARQ index signal to produce the situation that scheme 1 produces the HARQ index signal, the signal acquisition unit 220 of UE 200 is configured to: the signal in the Resource Unit that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal.Here, because two groups of UE specific reference signals all are known for UE 200, therefore signal acquisition unit 220 can compare signal and the known UE specific reference signals of transmitting in the RE corresponding with the UE specific reference signals, thereby the signal that transmits among the RE that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal.In this case, the signal that transmits in the RE corresponding with another group UE specific reference signals in two groups of UE specific reference signals is the original UE specific reference signals of non-modulated signal modulation, i.e. not bearing downlink physics HARQ indication.Therefore, demodulating unit 230 is configured to: utilize the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.For example, demodulating unit 230 can (thereby wherein one group of carrying HARQ indication becomes the HARQ index signal according to two groups of UE specific reference signals, thereby another group is not carried HARQ indication and still is original UE specific reference signals) between phase difference, bit number and modulation mapping scheme (for example table 1) according to known downlink physical HARQ indication, come demodulation HARQ index signal, thereby obtain downlink physical HARQ indication.

On the other hand, for utilizing above-mentioned HARQ index signal to produce the situation that scheme 2 produces the HARQ index signal, signal acquisition unit 220 is configured to: the signal in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal.Demodulating unit 230 is configured to: utilize two groups of UE specific reference signals that receive from another antenna port that fixed phase is provided; And come the determined HARQ index signal of demodulation according to described fixed phase.For example, demodulating unit 230 can pass through according to the phase difference between the original UE specific reference signals of HARQ index signal and above-mentioned another antenna port, bit number and modulation mapping scheme (for example table 1) according to known downlink physical HARQ indication, come demodulation HARQ index signal, thereby obtain downlink physical HARQ indication.Note, in this case, for these two antenna ports, the RE corresponding with the UE specific reference signals must adopt identical precoding to carry out beam forming.

When the PDSCH of descending physics HARQ indication and UE carries out when multiplexing, can also adopt the method (R1-080190 of PDSCH and physics HARQ indication joint-detection, EmbeddingACK/NAK in CQI Reference Signals and Receiver Structures, TexasInstruments), further improve the accuracy rate that detects.

In addition, when system adopts expansion CP pattern, and current subframe is that TDD uplink-downlink configuration scheme is that 1,6 special subframe is (according to agreement, TDD uplink-downlink configuration scheme is that 2,3,5 special subframe does not carry the HARQ indication) time, by finding out among Fig. 2, only has one group of reference signal in each such subframe.Can't come sending/receiving downlink physical HARQ indication this moment with said method.Therefore, can be by revising Physical HARQ Indicator Channel assigning process (36.213, the Evolved Universal Terrestrial Radio Access (E-UTRA) under the tdd mode; Physical layer procedures, V10.1.0,3GPP) avoid this problem, namely this subframe is not used in the distribution Physical HARQ Indicator Channel.

For example, as shown in table 2, under the LTE Rel-10TDD pattern, PUSCH transmission for n subframe scheduling in Serving cell, UE will determine the transfer resource of downlink physical HARQ indication in n+k_PHICH subframe of this Serving cell, wherein k_PHICH represents the transmission intercal (take subframe as unit) that the HARQ index signal postpones with respect to PUSCH.By table 2 being revised as table 3 (bold Italic underlines), above-mentioned special subframe will not be used further to transmit downlink physical HARQ indication.These downlink physical HARQ indication will be transferred on other subframes and transmit, and correspondingly increase the use of the downlink physical HARQ indication transfer resource on other subframes.

K_PHICH under the table 2-TDD pattern

K_PHICH under the amended tdd mode of table 3-

For example, in above-mentioned table 2, in the special subframe of TDD uplink-downlink configuration scheme 1, the k_PHICH value of subframe 2 is 4, and namely the HARQ index signal postpones 4 subframes (subframe 6 of TDD uplink-downlink configuration scheme 1) transmission after PUSCH.In amended table 3, the k_PHICH value of subframe 2 is revised as 7, thereby the HARQ index signal postpones 7 subframes (subframe 9 of TDD uplink-downlink configuration scheme 1) transmission after PUSCH, thereby with the transmission delay of the HARQ index signal subframe 9 to TDD uplink-downlink configuration scheme 1, avoided transmitting HARQ index signal in the special subframe 6 of TDD uplink-downlink configuration scheme 1.In the table 3 other are revised in like manner.Notice that these modifications only are exemplary, satisfy above-mentioned effect as long as revise, namely TDD uplink-downlink configuration scheme is that 1,6 special subframe is not used further to transmit downlink physical HARQ indication, transmits on other subframes and transfer to, and all should be included in the invention scope.

[the second embodiment]

The second embodiment of the present invention is below described.In above-mentioned the first embodiment, base station 100 utilizes the RE corresponding with the UE specific reference signals to carry the HARQ indication, and comes the HARQ index signal is carried out demodulation based on the UE specific reference signals.Yet in the second embodiment described below, base station 100 utilizes data RE to carry the HARQ indication, and comes the HARQ index signal is carried out demodulation based on the UE specific reference signals.For convenience of explanation, following emphasis is described the difference of the second embodiment and the first embodiment, and has omitted the detailed description to the feature identical with the first embodiment.

In the present embodiment, with similar among the first embodiment, base station 100 comprises: modulating unit 110 is modulated to modulation symbol with downlink physical HARQ indication; Signal generation unit 120, the modulation symbol of modulating based on modulating unit produces the HARQ index signal, and described HARQ index signal will be come demodulation based on the UE specific reference signals; And transmitting element 130, the HARQ index signal of utilizing antenna port to come the transmitted signal generation unit to produce.

For example, during the single Serving cell of up configuration, downlink physical HARQ instruction content is the HARQ ACK/NACK of 1 or 2 bits, and whether 1 or 2 transmission block that is used to indicate up PUSCH is correctly received by the base station.During n Serving cell of up configuration, downlink physical HARQ instruction content is upper HARQ ACK/NACK to the 2n bit, and maximum 2 bits of each Serving cell correspond respectively to 2 transmission blocks.The uplink service cell maximum number is 5 at present, so downlink physical HARQ indication mostly is 10 bits most.

In the present embodiment, base station 100 also comprises optional determining unit (not shown).Determining unit is configured to determine be used in each Resource Block (RB) number of the data resource unit (RE) of transmission downlink physical HARQ indication.The data RE number Q that is used for transmission downlink physical HARQ indication among each RB can pass through semi-static signaling to UE 200 by base station 100, can also determine by one of following exemplary method:

The determining unit of base station 100 can be configured to, and the bit number that transmits employed Resource Block RB number N _ RB and downlink physical HARQ indication according to the uplink scheduling corresponding with downlink physical HARQ indication determines to be used in each Resource Block the number Q of the data resource unit that transmission downlink physical HARQ indicates.That is, Q is the function of N_RB and O.An example determines that method is Q=min (4*N_RB*O, N_total), and wherein N_total is the RE number that can be used for transmitting downlink physical HARQ indication among this RB.

Alternatively, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, the determining unit of base station 100 can be configured to, according to the bit number O of not number of coded bits K, the downlink physical HARQ indication of each Resource Unit transmission among the PDSCH with regulate the number that B parameter (skew between the PDSCH modulation mapping mode of semi-static configuration and the encoding rate of downlink physical HARQ indication, optional) determines to be used in each Resource Block the data resource unit that transmission downlink physical HARQ indicates.That is, Q is the function of K, O and B.Example determine method be Q=min (ceil (O*B/K), N_total), wherein ceil is the function that rounds up, N_total is the RE number that can be used for transmitting downlink physical HARQ indication among this RB.

Downlink physical HARQ indication not with the Physical Downlink Shared Channel PDSCH of UE in the situation of data-reusing under (resource that minute is used in downlink physical HARQ indication this moment is not reused to transmit the PDSCH of same UE), the modulating unit 110 of base station 100 can preferentially be selected the modulation mapping mode of QPSK (Quadrature Phase Shift Keying).On the other hand, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE (resource that minute is used in downlink physical HARQ indication this moment is reused to transmit the PDSCH of same UE), the modulating unit 110 of base station 100 can be selected the modulation mapping mode identical with the modulation mapping mode of the current multiplexing PDSCH of corresponding RB and antenna port.

In the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, the modulating unit 110 of base station 100 can be continued to use among the LTE Rel-10 method of control information chnnel coding (36.212, Evolved Universal TerrestrialRadio Access (E-UTRA) among the PUSCH; Multiplexing and channel coding, V10.1.0,3GPP) come downlink physical HARQ indication to carry out coded modulation.Particularly, if downlink physical HARQ indication comprises 1 bit information, namely

Then according to behind the right hurdle of table 4 coding, be modulated into modulation symbol according to the order of modulation on the left hurdle of table 4; If downlink physical HARQ indication comprises 2 bit informations, namely

Then according to behind the right hurdle of table 5 coding, be modulated into modulation symbol according to the order of modulation on the left hurdle of table 5, wherein

If physics HARQ indication comprises 3≤O ^ACK≤ 10 bit informations, i.e. polymerization physics HARQ corresponding to a plurality of uplink service cell indication, be designated as

Then at first pass through bit sequence

Produce bit sequence behind the input table 6 (table 6 is 3GPP agreement 36.212, the block code coding method of definition in the 5.2.2.6.4 joint)

Then will

Be cycled to repeat the generation sequence Q wherein _ACK=Q _m(Q is the data RE number that is used for transmission downlink physical HARQ indication among aforesaid each RB to Q, Q _mOrder of modulation for selected modulation system), then will

Be modulated into modulation symbol according to selected order of modulation.

Table 4-1 bit downlink physical HARQ indication coded modulation

The coded modulation of table 5-2 bit physics HARQ indication

Table 4,5 " x " and " y " are used for the Euclidean distance between the modulation symbol of maximization bearing downlink physics HARQ indication.

The coding method of table 6-3 to 10 bit downlink physical HARQ indication

i	M i，0	M i，1	M i，2	M i，3	M i，4	M i，5	M i，6	M i，7	M i，8	M i，9	M i，10
												0	1	1	0	0	0	0	0	0	0	0	1
1	1	1	1	0	0	0	0	0	0	1	1
												2	1	0	0	1	0	0	1	0	1	1	1
3	1	0	1	1	0	0	0	0	1	0	1
												4	1	1	1	1	0	0	0	1	0	0	1
5	1	1	0	0	1	0	1	1	1	0	1
												6	1	0	1	0	1	0	1	0	1	1	1
7	1	0	0	1	1	0	0	1	1	0	1
												8	1	1	0	1	1	0	0	1	0	1	1
9	1	0	1	1	1	0	1	0	0	1	1
												10	1	0	1	0	0	1	1	1	0	1	1
11	1	1	1	0	0	1	1	0	1	0	1
												12	1	0	0	1	0	1	0	1	1	1	1
13	1	1	0	1	0	1	0	1	0	1	1
												14	1	0	0	0	1	1	0	1	0	0	1
15	1	1	0	0	1	1	1	1	0	1	1
												16	1	1	1	0	1	1	1	0	0	1	0
17	1	0	0	1	1	1	0	0	1	0	0
												18	1	1	0	1	1	1	1	1	0	0	0
19	1	0	0	0	0	1	1	0	0	0	0
												20	1	0	1	0	0	0	1	0	0	0	1
21	1	1	0	1	0	0	0	0	0	1	1
												22	1	0	0	0	1	0	0	1	1	0	1
23	1	1	1	0	1	0	0	0	1	1	1
												24	1	1	1	1	1	0	1	1	1	1	0
25	1	1	0	0	0	1	1	1	0	0	1
												26	1	0	1	1	0	1	0	0	1	1	0
27	1	1	1	1	0	1	0	1	1	1	0
												28	1	0	1	0	1	1	1	0	1	0	0
29	1	0	1	1	1	1	1	1	1	0	0
												30	1	1	1	1	1	1	1	1	1	1	1
31	1	0	0	0	0	0	0	0	0	0	0

In the present embodiment, signal generation unit 120 is configured to: modulation symbol is mapped to the data resource unit (RE) that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.Preferably, described data resource unit (RE) is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position, thereby so that UE 200 can be based on the UE specific reference signals, channel information comes demodulation HARQ to take full advantage of accurately.As example, as shown in figure 11, when data RE number Q was 8, the one or more REs adjacent with the time-frequency position of UE specific reference signals (for example shade RE) can be used for transmitting these modulation symbols.

As example, the data RE of the carrying HARQ index signal that signal generation unit 120 produces will be at the transfer resource (RB and antenna port transmit) of UE 200 and base station 100 agreements, and wherein the RB number is preferably 1.For example, base station 100 will be notified to UE for RB sequence number and the antenna port sequence number of transmitting HARQ index signal by semi-static signaling.

Alternatively, when the method for downlink physical HARQ indication extends to each Serving cell mode simply when downlink physical HARQ corresponding to the PUSCH in the single Serving cell of up configuration or a plurality of Serving cells of up configuration and each Serving cell indication can be according to the single Serving cell of up configuration (as shown in Figure 4), the transfer resource of the HARQ index signal that the PUSCH in each Serving cell is corresponding can adopt method as shown in figure 10 to distribute.Namely suppose to take RB n based on the uplink scheduling PDCCH (ePDCCH) of UE specific reference signals demodulation, n+1, ..., n+x (n wherein, n+1 ..., n+x is the RB index) transmission, and the antenna port of transmission is p, and then base station 100 can be transmitted the HARQ index signal corresponding with this uplink scheduling at RB n and antenna port p.In other words, the RB for the transmitting HARQ index signal can be uplink scheduling transmission employed first RB corresponding with the HARQ index signal; The antenna port that is used for the transmitting HARQ index signal can be that the uplink scheduling corresponding with the HARQ index signal transmits employed antenna port.

Alternatively, when a plurality of Serving cells of up configuration and physical down HARQ that the PUSCH in a plurality of Serving cells is corresponding indication combined coding (as shown in Figure 5), the transfer resource of the HARQ index signal of combined coding can adopt method as shown in figure 10 to distribute.The RB that namely is used for the HARQ index signal of transmission combined coding can be uplink scheduling transmission employed first RB corresponding with the HARQ index signal of this combined coding; The antenna port that is used for the HARQ index signal of transmission combined coding can be that the uplink scheduling corresponding with the HARQ index signal of this combined coding transmits employed antenna port.Here, uplink scheduling determines that method is: when on the descending main Serving cell uplink scheduling being arranged, select all the time the uplink scheduling of main Serving cell; When main Serving cell did not have uplink scheduling, all the time selection had the uplink scheduling in the minimum inferior Serving cell of the inferior Serving cell small area ID (ScellIndex-r10) of uplink scheduling; When on the descending main Serving cell a plurality of uplink scheduling being arranged, select all the time the uplink scheduling in the Serving cell of residential quarter ID minimum of corresponding uplink service cell in these uplink schedulings.Alternatively, definite method of another uplink scheduling is, selects all the time the uplink scheduling in the Serving cell of residential quarter ID minimum of corresponding uplink service cell in all uplink schedulings.

Therefore, UE 200 (being specially signal acquisition unit 220) can according to agreement or the above-mentioned Resource Allocation Formula of base station 100, receive the HARQ index signal by the resource (RB and antenna port) that is used for the transmitting HARQ index signal, to detect downlink physical HARQ indication.

In the present embodiment, UE 200 comprises: receiving element 210 receives the UE specific reference signals from antenna port; Signal acquisition unit 220 obtains the HARQ index signal, and indication produces described HARQ index signal based on downlink physical HARQ; And demodulating unit 230, come demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

Particularly, the signal acquisition unit 220 of UE 200 is configured to: come to obtain the data resource unit of demodulation the HARQ index signal from utilizing the UE specific reference signals.Demodulating unit 230 is configured to: based on the UE specific reference signals, also come demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

Figure 12 is the flow chart according to the flow chart of the method 300 that is used for transmission downlink physical HARQ indication of the embodiment of the invention.In the following description, for clear, in conjunction with the specific embodiment of above base station 100 method of the present invention is described.Yet, those skilled in the art will recognize that, specific functional units in conjunction with above base station 100 illustrates that method of the present invention only is for illustrative purpose, in the situation that for example come implementation method with computer program, do not need the division of this functional unit and assembly fully, but the as a whole method of the present invention that realizes is made in base station 100.

According to the present invention, a kind of method 300 that sends downlink physical mixed automatic retransfer request HARQ indication may further comprise the steps:

In step 302, modulating unit 110 is modulated to modulation symbol with downlink physical HARQ indication.

In step 304, signal generation unit 120 produces the HARQ index signal based on described modulation symbol, and described HARQ index signal will be come demodulation based on the user equipment (UE) specific reference signals.

In step 306, transmitting element 130 utilizes antenna port to send the HARQ index signal.

According to embodiment, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous.In step 304, signal generation unit 120 multiply by one of two groups of UE specific reference signals corresponding with described antenna port with described modulation symbol, to produce described HARQ index signal.Alternatively, in step 304, signal generation unit 120 multiply by the two group UE specific reference signals corresponding with described antenna port with described modulation symbol, produces described HARQ index signal.

According to another embodiment, in step 304, signal generation unit 120 maps to described modulation symbol the data resource unit that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, before step 302, method of the present invention also comprises: the number of determining in each Resource Block to be used for the data resource unit of transmission downlink physical HARQ indication.The number that is used for the data resource unit of transmission downlink physical HARQ indication in each Resource Block is according to indicating the bit number that corresponding uplink scheduling transmits employed resource block number and downlink physical HARQ indication to determine with downlink physical HARQ.Alternatively, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, the number of the data resource unit of indicating for transmission downlink physical HARQ in each Resource Block is that the not number of coded bits according to each Resource Unit transmission of PDSCH, bit number and the adjusting parameter that downlink physical HARQ indicates are determined.

Figure 13 is the flow chart according to the flow chart of the method 400 that is used for reception downlink physical HARQ indication of the embodiment of the invention.In the following description, for clear, in conjunction with the specific embodiment of above UE 200 method of the present invention is described.Yet, those skilled in the art will recognize that, specific functional units in conjunction with above UE 200 illustrates that method of the present invention only is for illustrative purpose, in the situation that for example come implementation method with computer program, do not need the division of this functional unit and assembly fully, but UE 200 makes the as a whole method of the present invention that realizes.

According to the present invention, a kind of method 400 that receives downlink physical mixed automatic retransfer request HARQ indication may further comprise the steps.

In step 402, receiving element 210 receives the user equipment (UE) specific reference signals from antenna port.

In step 404, signal acquisition unit 220 obtains the HARQ index signal, and indication produces described HARQ index signal based on downlink physical HARQ.

In step 406, demodulating unit 230 comes demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

According to embodiment, described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous.In step 404, the signal in the Resource Unit that signal acquisition unit 220 will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal; In step 406, demodulating unit 230 utilizes the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided, and comes the determined HARQ index signal of demodulation according to described fixed phase.Alternatively, in step 404, the signal of signal acquisition unit 220 in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal; In step 406, demodulating unit 230 utilizes two groups of UE specific reference signals that receive from another antenna port that fixed phase is provided, and comes the determined HARQ index signal of demodulation according to described fixed phase.

According to another embodiment, in step 406, signal acquisition unit 220 is from utilizing the UE specific reference signals to come to obtain the data resource unit of demodulation the HARQ index signal.Preferably, described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

Preferably, in step 406, demodulating unit 230 comes demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

The present invention is based on the UE specific reference signals and come demodulation downlink physical HARQ indication, a kind of method of sending and receiving, subscriber equipment and base station of downlink physical HARQ indication of novelty is provided, filled up the blank of existing standard.

Should be noted in the discussion above that in above description, only in the mode of example, show technical scheme of the present invention, but be not intended that the invention be limited to above-mentioned steps and cellular construction.Under possible situation, can adjust and accept or reject step and cellular construction as required.Therefore, some step and unit are not to implement the necessary element of overall invention thought of the present invention.Therefore, technical characterictic essential to the invention only is subject to the minimum requirements that can realize overall invention thought of the present invention, and is not subjected to the restriction of above instantiation.

In above description, enumerated Multi-instance, although the inventor indicates example associated with each other as much as possible, this does not also mean that must there be corresponding relation in these examples according to described mode.As long as do not have contradiction between the given condition of selected example, can select not corresponding example to consist of corresponding technical scheme, such technical scheme also should be considered as within the scope of the invention involved.

So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that, those skilled in the art are in the situation that break away from the spirit and scope of the present invention, can carry out various other change, replacement and interpolations.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.

Claims (30)

1. one kind sends the method that downlink physical mixed automatic retransfer request HARQ indicates, and may further comprise the steps:

Downlink physical HARQ indication is modulated to modulation symbol;

Produce the HARQ index signal based on described modulation symbol, described HARQ index signal will be come demodulation based on the user equipment (UE) specific reference signals; And

Utilize antenna port to send the HARQ index signal.

2. method according to claim 1, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And

The step that produces the HARQ index signal comprises:

Described modulation symbol be multiply by one of two groups of UE specific reference signals corresponding with described antenna port, to produce described HARQ index signal.

3. method according to claim 1, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals transmitted in a plurality of subcarrier in frequency domain, and comprises two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And

The step that produces the HARQ index signal comprises:

Described modulation symbol be multiply by the two group UE specific reference signals corresponding with described antenna port, produce described HARQ index signal.

4. method according to claim 1, wherein, the step that produces the HARQ index signal comprises:

Described modulation symbol is mapped to the data resource unit that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.

5. method according to claim 4, wherein

Described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

6. before downlink physical HARQ indication is modulated to modulation symbol, also comprise according to claim 4 or 5 described methods:

Determine in each Resource Block to be used for the number of the data resource unit of transmission downlink physical HARQ indication.

7. method according to claim 6, wherein

The number that is used for the data resource unit of transmission downlink physical HARQ indication in each Resource Block is according to indicating the bit number that corresponding uplink scheduling transmits employed resource block number and downlink physical HARQ indication to determine with downlink physical HARQ.

8. method according to claim 6, wherein

In the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, the number of the data resource unit of indicating for transmission downlink physical HARQ in each Resource Block is that the not number of coded bits according to each Resource Unit transmission of PDSCH, bit number and the adjusting parameter that downlink physical HARQ indicates are determined.

9. base station comprises:

Modulating unit is modulated to modulation symbol with downlink physical mixed automatic retransfer request HARQ indication;

The signal generation unit, the modulation symbol of modulating based on modulating unit produces the HARQ index signal, and described HARQ index signal will be come demodulation based on the user equipment (UE) specific reference signals; And

Transmitting element, the HARQ index signal of utilizing antenna port to come the transmitted signal generation unit to produce.

10. base station according to claim 9, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And

Described signal generation unit is configured to:

The modulation symbol of modulating unit modulation be multiply by one of two groups of UE specific reference signals corresponding with described antenna port, to produce described HARQ index signal.

11. base station according to claim 9, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals transmitted in a plurality of subcarrier in frequency domain, and comprises two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous; And

Described signal generation unit is configured to:

The modulation symbol of modulating unit modulation be multiply by the two group UE specific reference signals corresponding with described antenna port, produce described HARQ index signal.

12. base station according to claim 9, wherein, described signal generation unit is configured to:

Described modulation symbol is mapped to the data resource unit that will utilize the UE specific reference signals to come demodulation, to produce the HARQ index signal.

13. base station according to claim 12, wherein

Described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

14. according to claim 12 or 13 described base stations, also comprise:

Determining unit determines in each Resource Block to be used for the number of the data resource unit of transmission downlink physical HARQ indication.

15. base station according to claim 14, wherein

Described determining unit is configured to determine to be used in each Resource Block according to the bit number that the uplink scheduling corresponding with downlink physical HARQ indication transmits employed resource block number and downlink physical HARQ indication the number of the data resource unit that transmission downlink physical HARQ indicates.

16. base station according to claim 14, wherein

Described determining unit is configured to, in the situation of the data-reusing in the Physical Downlink Shared Channel PDSCH of downlink physical HARQ indication and UE, according to the bit number of the not number of coded bits of each Resource Unit transmission among the PDSCH, downlink physical HARQ indication with regulate the number that parameter determines to be used in each Resource Block the data resource unit that transmission downlink physical HARQ indicates.

17. a method that receives downlink physical mixed automatic retransfer request HARQ indication may further comprise the steps:

Receive the user equipment (UE) specific reference signals from antenna port;

Obtain the HARQ index signal, indication produces described HARQ index signal based on downlink physical HARQ; And

Come demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

18. method according to claim 17, wherein,

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous;

The step that obtains the HARQ index signal comprises:

Signal in the Resource Unit that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal;

The step of demodulation HARQ index signal comprises:

Utilize the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided; And

Come the determined HARQ index signal of demodulation according to described fixed phase.

19. method according to claim 17, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous;

The step that obtains the HARQ index signal comprises:

Signal in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal;

The step of demodulation HARQ index signal comprises:

Utilization provides fixed phase from two groups of UE specific reference signals that another antenna port receives; And

Come the determined HARQ index signal of demodulation according to described fixed phase.

20. method according to claim 17, wherein, the step that obtains the HARQ index signal comprises:

Come to obtain the data resource unit of demodulation the HARQ index signal from utilizing the UE specific reference signals.

21. method according to claim 20, wherein

Described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

22. according to claim 20 or 21 described methods, wherein, the step of demodulation HARQ index signal comprises:

Come demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

23. a user equipment (UE) comprises:

Receiving element receives the UE specific reference signals from antenna port;

The signal acquisition unit obtains mixed automatic retransfer request HARQ index signal, and indication produces described HARQ index signal based on downlink physical HARQ; And

Demodulating unit comes demodulation HARQ index signal based on the UE specific reference signals, to detect downlink physical HARQ indication.

24. user equipment (UE) according to claim 23, wherein,

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous;

Described signal acquisition unit is configured to:

Signal in the Resource Unit that will be corresponding with one of two groups of UE specific reference signals is defined as the HARQ index signal;

Described demodulating unit is configured to:

Utilize the UE specific reference signals in the Resource Unit corresponding with another group in two groups of UE specific reference signals that fixed phase is provided; And

Come the determined HARQ index signal of demodulation according to described fixed phase.

25. user equipment (UE) according to claim 23, wherein

Described antenna port has two groups of UE specific reference signals in time domain, and every group of UE specific reference signals is in a plurality of subcarrier in frequency domain transmission and comprise two Resource Units that each subcarrier in frequency domain frequency domain position is identical, time-domain position is continuous;

Described signal acquisition unit is configured to:

Signal in will the Resource Unit corresponding with two groups of UE specific reference signals is defined as the HARQ index signal;

Described demodulating unit is configured to:

Utilization provides fixed phase from two groups of UE specific reference signals that another antenna port receives; And

Come the determined HARQ index signal of demodulation according to described fixed phase.

26. user equipment (UE) according to claim 23, wherein, described signal acquisition unit is configured to:

Come to obtain the data resource unit of demodulation the HARQ index signal from utilizing the UE specific reference signals.

27. user equipment (UE) according to claim 26, wherein

Described data resource unit is one or more data resources unit adjacent with the UE specific reference signals on time-domain position and frequency domain position.

28. according to claim 26 or 27 described user equipment (UE)s, wherein, described demodulating unit is configured to:

Also come demodulation HARQ index signal based on the number of the data resource unit that is used for transmission downlink physical HARQ indication in each Resource Block and the modulation scheme of HARQ index signal.

29. a method that is used for sending downlink physical mixed automatic retransfer request HARQ indication may further comprise the steps:

Indicate to produce the HARQ index signal based on downlink physical HARQ; And

Utilize Resource Block RB and antenna port to send the HARQ index signal,

Wherein, the RB that is used for the transmitting HARQ index signal comprises uplink scheduling transmission employed first RB corresponding with the HARQ index signal, and the antenna port that is used for the transmitting HARQ index signal comprises that the uplink scheduling corresponding with the HARQ index signal transmits employed antenna port.

30. method according to claim 29, wherein, the antenna port that is used for the transmitting HARQ index signal also comprises the additional antenna port.

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