CN104038324A - Method for sending hybrid automatic repeat request indicator channel, and base station - Google Patents

Abstract

The invention provides a method executed by a base station. The method comprises: generating the information bit of an enhancement physical hybrid automatic repeat request indicator channel (ePHICH) comprising system information of the base station; performing repeated coding, modulation and spectrum spreading on the information bit of the ePHICH so as to generate an ePHICH sequence; performing code division multiplexing and interlacing on the generated ePHICH to obtain an ePHICH set sequence; selecting a physical resource block (PRB) from the PRBs occupied by the common search space (CSS) of an enhanced physical downlink control channel (ePDCCH); and according to a service cell identification, executing the resource mapping of the ePHICH set sequence in the selected PRB. The invention also provides a base station. By using the method and the base station, provided by the invention, the energy utilization efficiency in an LTE-Advanced system can be enhanced, the frequency spectrum efficiency is improved, and the time-frequency resource conflicts among cells are reduced.

Description

The sending method of hybrid automatic repeat request indication channel and base station

Technical field

The present invention relates to wireless communication technology field.More specifically, the present invention relates to sending method and the base station of mixed automatic retransfer request (HARQ) indicating channel of Serving cell.

Background technology

The Long Term Evolution project (LTE) that 3G (Third Generation) Moblie cooperative programme tissue (3GPP) is disposed aims to provide day by day diversified communication service, and packetized voice communication is a part wherein.In the front page (being Release8) of 3GPP LTE, OFDM (OFDMA) and many antennas (MIMO) technology have been introduced.In November, 2010, the Release10 version of 3GPP, through assessment and the test of International Telecommunications Union, formally becomes the 4th generation global mobile communication standard LTE-Advanced.In LTE-Advanced standard, introduced carrier aggregation (CA), the Inter-Cell Interference Coordination technology of enhancement mode, relaying technique, and enhanced uplink/descending MIMO technology are supported the arrangement of heterogeneous network (HetNet) simultaneously.

In order further to improve the energy utilization rate of LTE-Advanced system and to improve spectrum efficiency, 3GPP determines to introduce a kind of brand-new carrier type (NCT) in the evolution version (Release11) of current LTE-Advanced, this work is mainly divided into two stages and carries out: the first stage is standard NCT under CA framework, relates generally to the synchronous of intercarrier and reduces cell special reference (CRS) and the control channel region on NCT; Second stage is the NCT operation realizing under stand-alone mode (Stand-alone),, in one or more Serving cells of cellular system, only has NCT carrier wave, for Mobile Communication Service and data manipulation are provided.

The operation of NCT under stand-alone mode relates generally to the broadcast mechanism of Serving cell system information, the mobility of obtaining and supporting subscriber equipment (UE) of the public search space (CSS) of enhancement mode physical downlink control channel (ePDCCH), the reading etc. of downlink physical HARQ indicating channel.

According to the progress of current NCT and future trend, cell special reference CRS will not be used further to signal demodulation.Yet the current system information broadcast mechanism of LTE is the demodulation based on CRS, as Physical Broadcast Channel (PBCH), physical downlink control channel (PDCCH) and physical mixing retransmission indicating chanel PHICH channel etc.Therefore, the demodulation function based on CRS and the transmission that realizes PHICH channel is a problem of needing solution badly not under stand-alone mode how.

A kind of solution is intuitively the demodulated reference signal (DMRS) based on current LTE.Yet the original intention that LTE introduced DMRS is originally special-purpose (UE-Specific) reference signal of user.Particularly, the user data of downlink transfer and the with it reference signal of correspondence adopt identical pre-coding scheme, to realize the demodulation by Physical Resource Block (PRB), are applicable to frequency division multiplexing structure.Moreover, existing PHICH be in whole downlink system bandwidth, carry out multiplexing, existing PHICH scheme is not suitable for adopting the demodulation based on DMRS, this is because when all DMRS port solution timing for PHICH, can reduce the flexibility with the transmission mode of the time-multiplexed physical down link sharing channel of PHICH (PDSCH).

Summary of the invention

For above problem, the present invention proposes a kind of enhancement mode PHICH (that is, transmit mechanism ePHICH).According to the present invention, under NCT stand-alone mode, realized a kind of mechanism that allows base station transmission PHICH information and permission UE to obtain this system information.The demodulation function that the present invention is based on DMRS has redesigned PHICH, can realize multiplexing with the public search space (CSS) of ePDCCH.

According to an aspect of the present invention, provide a kind of method of being carried out by base station, having comprised: the enhancement mode physical mixing retransmission indicating chanel ePHICH information bit that produces the system information that comprises described base station; EPHICH information bit is carried out to repeated encoding, modulation and spread spectrum, to produce ePHICH sequence; The ePHICH sequence producing is carried out code division multiplexing and interweaved, obtain ePHICH group sequence; From the occupied Physical Resource Block PRB of the public search space CSS of enhancement mode physical downlink control channel ePDCCH, select PRB; And according to Serving cell sign, in the PRB selecting, carry out the resource mapping of ePHICH group sequence.

Preferably, by described ePHICH information bit repeated encoding m time, m is positive integer.

Preferably, the ePHICH information bit after repeated encoding is carried out to binary phase shift keying BPSK modulation and quadrature Walsh spread spectrum, to produce ePHICH sequence.

Preferably, according to the configuring condition of the ePHICH group of subframe and Serving cell sign, from the occupied physical resource module PRB of the CSS of ePDCCH, select PRB.

Preferably, the resource mapping of ePHICH group sequence is with resource ZuREGWei unit, and each ePHICH group sequence is corresponding to m resource group, and m is the repeated encoding number of times of ePHICH information bit.

Preferably, while there is cell special reference CRS in an OFDM symbol, in this OFDM symbol, pre-define 2 REG for ePHICH.When in an OFDM symbol, all resource element RE can be used for ePHICH, in this OFDM symbol, definition is for 3 REG of ePHICH.In addition,, while there is demodulated reference signal DMRS, channel condition information measuring reference signals CSI-RS, synchronizing signal PSS/SSS in an OFDM symbol, in this OFDM symbol, do not define any REG for ePHICH.

Preferably, for the PRB of dissimilar subframe, predefined resource group REG can adopt unified form, also can adopt different forms.

Preferably, for regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

Preferably, the method also comprises: with identical antenna port, transmit ePHICH and ePDCCH-CSS.

Preferably, the method also comprises: with identical launch scenario, transmit ePHICH and ePDCCH-CSS.

According to an aspect of the present invention, provide a kind of base station, having comprised: codeword sequence generation unit, has been configured to the enhancement mode physical mixing retransmission indicating chanel ePHICH information bit that generation comprises the system information of described base station; EPHICH sequence generation unit, is configured to ePHICH information bit to carry out repeated encoding, modulation and spread spectrum, to produce ePHICH sequence; And the ePHICH sequence producing is carried out code division multiplexing and interweaved, obtain ePHICH group sequence; Physical Resource Block PRB selected cell, is configured to select PRB from the occupied Physical Resource Block PRB of the public search space CSS of enhancement mode physical downlink control channel ePDCCH; And map unit, be configured to carry out the resource mapping that ePHICH organizes sequence in the PRB selecting.

Preferably, described ePHICH sequence generation unit is configured to: by described ePHICH information bit repeated encoding m time, m is positive integer.

Preferably, described ePHICH sequence generation unit is configured to: the ePHICH information bit after repeated encoding is carried out to binary phase shift keying BPSK modulation and quadrature Walsh spread spectrum, to produce ePHICH sequence.

Preferably, described PRB selected cell is configured to: according to configuring condition and the cell ID of the ePHICH group of subframe, from the occupied physical resource module PRB of the CSS of ePDCCH, select PRB.

Preferably, the resource mapping of ePHICH group sequence is with resource ZuREGWei unit, and each ePHICH group sequence is corresponding to m resource group, and m is the repeated encoding number of times of ePHICH information bit.

Preferably, while there is cell special reference CRS in an OFDM symbol, in this OFDM symbol, pre-define 2 REG for ePHICH.When in an OFDM symbol, all resource element RE can be used for ePHICH, in this OFDM symbol, definition is for 3 REG of ePHICH.In addition,, while there is demodulated reference signal DMRS, channel condition information measuring reference signals CSI-RS, synchronizing signal PSS/SSS in an OFDM symbol, in this OFDM symbol, do not define any REG for ePHICH.

Preferably, for the PRB of dissimilar subframe, predefined resource group REG can adopt unified form, also can adopt different forms.

Preferably, for regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

Preferably, this base station also comprises: transmission unit, is configured to transmit ePHICH and ePDCCH-CSS with identical antenna port.

Preferably, this base station also comprises: transmission unit, is configured to transmit ePHICH and ePDCCH-CSS with identical launch scenario.

Adopt the present invention, can improve the energy utilization rate in LTE-Advanced system and improve spectrum efficiency, reduce the time/frequency resource contention of minizone.

Accompanying drawing explanation

By detailed description with the accompanying drawing below, above-mentioned and further feature of the present invention will become more apparent, wherein:

Fig. 1 shows the structural representation of ePHICH according to an embodiment of the invention;

Fig. 2 shows according to an embodiment of the invention for realizing the flow chart of the method for being carried out by base station of ePHICH-REG mapping.

Fig. 3 shows according to an embodiment of the invention for realizing the schematic diagram (regular circulation prefix) of ePHICH-REG mapping.

Fig. 4 shows according to an embodiment of the invention for realizing the schematic diagram (extended cyclic prefix) of ePHICH-REG mapping.

Fig. 5 shows the block diagram of base station according to an embodiment of the invention.

Embodiment

Below with reference to the drawings and specific embodiments, system information sending/receiving method, base station and the subscriber equipment (UE) of the NCT for independent pattern proposed by the invention are described in detail.It should be noted that the present invention should not be limited to specific embodiment hereinafter described.In addition, for for simplicity, omitted there is no the detailed description of the known technology of direct correlation with the present invention, to prevent that the understanding of the present invention from causing, obscured.

Below using LTE mobile communication system and follow-up evolution version thereof as example application environment, specifically described according to a plurality of embodiment of the present invention.Yet, it is pointed out that and the invention is not restricted to following examples, but applicable to more other wireless communication systems, for example 5G cellular communication system from now on.

First with reference to Fig. 1, wherein show the structure of the ePHICH in LTE system according to an embodiment of the invention, comprise repeated encoding and orthogonal spectrum expansion.For fdd mode, ePHICH should be present in each subframe.EPHICH carries ACK or the nack message bit of mixed automatic retransfer request (HARQ), and this information bit is used to indicate base station (eNB) and whether correctly receives the transmission that sends to PUSCH.For example, (ACK) correctly replied in " 0 " representative, and " 1 " represents negative response (NACK).This information is carried out to repeated encoding, then carry out binary phase shift keying (BPSK) modulation.A plurality of ePHICH are mapped on same group of resource element, form ePHICH group, wherein in same group of ePHICH, different ePHICH separates by complex values quadrature Walsh sequence, for the sequence length of regular circulation prefix, is 4, for the sequence length of extended cyclic prefix, is 2.Because this sequence is complex values, the maximum number of one group of ePHICH can be 2 times of this sequence length.Each ePHICH is by two tuples identify uniquely, wherein the group number that represents residing group of ePHICH, represent the sequence number of quadrature Walsh sequence in ePHICH group.In order to obtain robustness, can use repeated encoding.For example, can use the repeated encoding of repetition 3 times.Like this, by 3 quadrature Walsh sequences, transmit each ACK or NACK, wherein each sequence is mapped in the resource group (REG) in the residing PRB of each subframe ePDCCH-CSS.EPHICH and ePDCCH-CSS can transmit on same antenna port.In addition,, if use many antenna ports, can also apply emission diversity scheme.

Fig. 2 shows the flow chart of the method 20 of being carried out by base station according to an embodiment of the invention.The method 20 can be carried out by the base station (eNB) in LTE system for example.As shown in Figure 2, method 20 starts at step S210 place to carry out.

At step S220 place, produce the codeword sequence of the system information that comprises base station (Serving cell).Particularly, under stand-alone mode, adopt the base station of NCT according to system bandwidth, to configure the number of PHICH group, and produce according to the reception condition of PUSCH the information bit (1/0) that certain ePHICH need to carry, wherein " 0 " represents correctly to reply, and " 1 " represents negative response.

At step S230 place, m repeated encoding (m is positive integer) carried out to ePHICH information bit in base station, and through BPSK modulation and quadrature Walsh code spread spectrum, produces ePHICH sequence.Next, the ePHICH sequence producing is carried out to code division multiplexing and cell-specific scrambler interweaves, obtain ePHICH group sequence.Each ePHICH in ePHICH group all can adopt identical repeated encoding scheme, for example, repeat 3 times or repeated encoding more frequently.

At step S240 place, base station is according to configuring condition and the cell ID of the ePHICH group of subframe, selects the PRB of some from the occupied physical resource module PRB of the CSS of ePDCCH.

At step S250 place, the resource mapping of ePHICH group is carried out in base station in selected PRB.In this application, to take resource group (REG) be unit to the resource mapping of ePHICH group.Each ePHICH group sequence is corresponding to m resource group, and wherein m is the repeated encoding number of times (m is positive integer) of ePHICH information bit.Preferably, the repeated encoding number of times of ePHICH is 3 (choosing m=3).

Fig. 3 and Fig. 4 show respectively the in the situation that of regular circulation prefix and extended cyclic prefix, according to an embodiment of the invention for realizing the schematic diagram of ePHICH-resource group (ePHICH-REG) mapping.According to the concept of the resource group defining in current LTE system, for demodulated reference signal (DMRS), synchronizing signal (PSS/SSS), the cell special reference (CRS) retaining, the resource of channel condition information measuring reference signals (CSI-RS), be not used in ePHICH.Therefore,, in a PRB, while there is CRS in an OFDM symbol, in this symbol, pre-define 2 REG.When all RE can be used for ePHICH in an OFDM symbol, in this symbol, define 3 REG.In addition, for example,, while there is the signal (DMRS/CSI-RS/PSS/SSS) of non-CRS in an OFDM symbol, in this symbol, do not define any ePHICH-REG.

It should be noted in the discussion above that the PRB for dissimilar subframe, predefined resource group ePHICH-REG can adopt unified form, also can adopt different forms.

Preferably, for regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

In addition, ePHICH and ePDCCH-CSS carry out multiplexing in PRB, and ePHICH is only present in those occupied PRB of CSS.EPHICH transmits at identical antenna port with CSS.In addition,, if use many antenna ports, can also apply emission diversity scheme.

Get back to Fig. 2, method 20 finishes at step S260 place.

Below describe and how to choose PRB and how from the PRB choosing, to select for shining upon some examples of the REG of ePHICH group.

the CSS of example 1:ePDCCH is comprised of N PRB, N={3,6,9}.

In this example, multiplexing on a different m=3 CSS-PRB respectively for m=3 REG of each ePHICH group.First, CSS-PRB is carried out to number consecutively, be designated as in addition, pre-defined 10 ePHICH-REG in each CSS-PRB, number consecutively is as shown in Figure 3 and Figure 4.

The tlv triple #{x that example 1-1:ePHICH group forms corresponding to the ePHICH-REG sequence number by identical, y, z}, x=y=z now, and these 3 REG are from 3 different CSS-PRB, as shown in table 1 below.

The tlv triple #{x that example 1-2:ePHICH group forms corresponding to the ePHICH-REG sequence number by different, y, z}, x ≠ y ≠ z now, and these 3 REG are from 3 different CSS-PRB, as shown in table 1 below.For example, when N=9, for ePHICH-REG sequence number tlv triple #{x, y, z} can pre-define as #{0,3,6}, #{1,4,7}, #{2,5,8}.

Table 1. is when CSS is by N={3, and when 6,9} PRB forms, the PRB of ePHICH group chooses

the CSS of example 2:ePDCCH is comprised of N PRB, N={2,4,8}.

In this example, when N > 2, it is multiplexing on a different m=3 CSS-PRB respectively that each ePHICH organizes a corresponding m=3 REG; When N=2, each ePHICH organizes a corresponding m=3 REG and comes from same CSS-PRB.CSS-PRB is carried out to number consecutively, be designated as in addition, pre-defined 10 ePHICH-REG in each CSS-PRB, number consecutively is as shown in Figure 3 and Figure 4.

The tlv triple #{x that example 2-1:ePHICH group forms corresponding to the ePHICH-REG sequence number by identical, y, z}, now x=y=z.As shown in table 2 below, when N > 2, these 3 REG are from 3 different CSS-PRB.And when N=2, ePHICH-REG tlv triple (#{0 for example, 3,6}/#{1,4,7}/#{2,5,8}) come from same CSS-PRB.

The tlv triple #{x that example 2-2:ePHICH group forms corresponding to the ePHICH-REG sequence number by different, y, z}, now x ≠ y ≠ z.As shown in table 2 below, when N > 2, these 3 REG are from 3 different CSS-PRB.And when N=2, these 3 REG are from identical CSS-PRB.For example, for ePHICH-REG sequence number tlv triple #{x, y, z}, can pre-define as #{0 3,6}, #{1,4,7}, #{2,5,8}.

Table 2. is when CSS is by N={2, and when 4,8} PRB forms, the PRB of ePHICH group chooses

Fig. 5 shows the block diagram of base station 50 according to an embodiment of the invention.As shown in Figure 5, base station 50 comprises codeword sequence generation unit 510, ePHICH sequence generation unit 520, Physical Resource Block PRB selected cell 530 and map unit 540.

Codeword sequence generation unit 510 is configured to produce the ePHICH information bit of the system information that comprises base station 50.This information bit is used to indicate base station 50 and whether correctly receives the transmission that sends to PUSCH.For example, (ACK) correctly replied in " 0 " representative, and " 1 " represents negative response (NACK).

EPHICH sequence generation unit 520 is configured to ePHICH information bit to carry out repeated encoding, modulation and spread spectrum to produce ePHICH sequence, and the ePHICH sequence producing is carried out code division multiplexing and interweaved, and obtains ePHICH group sequence.For example, ePHICH sequence generation unit 520 can be by described ePHICH information bit repeated encoding 3 times, and the ePHICH information bit after repeated encoding is carried out to BPSK modulation and quadrature Walsh spread spectrum, to produce ePHICH sequence.

PRB selected cell 530 is configured to select PRB from the occupied Physical Resource Block PRB of the public search space CSS of enhancement mode physical downlink control channel ePDCCH.For example, PRB selected cell 530 can be according to configuring condition and the cell ID of the ePHICH group of subframe, from the occupied physical resource module PRB of the CSS of ePDCCH, selects PRB.

Map unit 540 is configured to carry out the resource mapping of ePHICH group sequence in the PRB selecting.Preferably, the resource mapping of ePHICH group sequence is with resource ZuREGWei unit, and each ePHICH group sequence is corresponding to m resource group, and m is the repeated encoding number of times (for example m=3) of ePHICH information bit.For example, while there is cell special reference CRS in an OFDM symbol, can in this OFDM symbol, pre-define 2 REG for ePHICH.When all resource element RE can be used for ePHICH in an OFDM symbol, can in this OFDM symbol, define 3 REG for ePHICH.While there is DMRS, CSI-RS, PSS or SSS in an OFDM symbol, in this OFDM symbol, do not define any REG for ePHICH.

In addition, for the PRB of dissimilar subframe, predefined resource group REG can adopt unified form, also can adopt different forms.For example, for regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

In addition,, although not shown in Fig. 5, base station 50 can also comprise transmission unit.This transmission unit can be configured to transmit ePHICH and ePDCCH-CSS with identical antenna port.Alternatively, this transmission unit also can be configured to transmit ePHICH and ePDCCH-CSS with identical transmit diversity.

The sending and receiving mechanism of the system information of the base station proposing by the application, has realized a kind of system information of transmission Serving cell, base station and mechanism that permission UE obtains this system information of allowing.The technical scheme that adopts the application to propose, can improve the energy utilization rate in LTE-Advanced system and improve spectrum efficiency, reduces the time/frequency resource contention of minizone.

Should be appreciated that, the above embodiment of the present invention can realize by both combinations of software, hardware or software and hardware.For example, the various assemblies of the base station in above-described embodiment and subscriber equipment inside can be realized by multiple device, and these devices include but not limited to: analog circuit device, digital circuit device, Digital Signal Processing (DSP) circuit, programmable processor, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD) etc.

In this application, " base station " refers to mobile data and the control switching point (CSP) with larger transmitting power and wider area coverage, comprises the functions such as resource allocation scheduling, data receiver transmission." subscriber equipment " refers to customer mobile terminal, such as comprising that mobile phone, notebook etc. can carry out with base station or micro-base station the terminal equipment of radio communication.

In addition, embodiments of the invention disclosed herein can be realized on computer program.More specifically, this computer program is following a kind of product: have computer-readable medium, on computer-readable medium, coding has computer program logic, and when carrying out on computing equipment, this computer program logic provides relevant operation to realize technique scheme of the present invention.While carrying out at least one processor at computing system, computer program logic makes the operation (method) described in the processor execution embodiment of the present invention.This set of the present invention is typically provided as and arranges or be coded in such as the software on the computer-readable medium of light medium (such as CD-ROM), floppy disk or hard disk etc., code and/or other data structures or such as other media or the Downloadable software image in one or more module, the shared data bank etc. of the firmware on one or more ROM or RAM or PROM chip or microcode.Software or firmware or this configuration can be arranged on computing equipment, so that the one or more processors in computing equipment are carried out the described technical scheme of the embodiment of the present invention.

Although below show the present invention in conjunction with the preferred embodiments of the present invention, one skilled in the art will appreciate that without departing from the spirit and scope of the present invention, can carry out various modifications, replacement and change to the present invention.Therefore, the present invention should not limited by above-described embodiment, and should be limited by claims and equivalent thereof.

Claims (20)

1. a method of being carried out by base station, comprising:

Generation comprises the enhancement mode physical mixing retransmission indicating chanel ePHICH information bit of the system information of described base station;

EPHICH information bit is carried out to repeated encoding, modulation and spread spectrum, to produce ePHICH sequence;

The ePHICH sequence producing is carried out code division multiplexing and interweaved, obtain ePHICH group sequence;

From the occupied Physical Resource Block PRB of the public search space CSS of enhancement mode physical downlink control channel ePDCCH, select PRB; And

According to Serving cell sign, in the PRB selecting, carry out the resource mapping of ePHICH group sequence.

2. method according to claim 1, wherein, by described ePHICH information bit repeated encoding m time, m is positive integer.

3. method according to claim 1, wherein, carries out binary phase shift keying BPSK modulation and quadrature Walsh spread spectrum by the ePHICH information bit after repeated encoding, to produce ePHICH sequence.

4. method according to claim 1 wherein, according to the configuring condition of the ePHICH group of subframe and Serving cell sign, is selected PRB from the occupied physical resource module PRB of the CSS of ePDCCH.

5. method according to claim 1, wherein, the resource mapping of ePHICH group sequence with resource ZuREGWei unit (wherein, the definition of REG is consistent with existing LTE system), each ePHICH group sequence is corresponding to m resource group, m is the repeated encoding number of times of ePHICH information bit, and m is positive integer.

6. method according to claim 5, wherein, for a PRB,

While there is cell special reference CRS in an OFDM symbol, in this OFDM symbol, pre-define 2 REG for ePHICH;

When in an OFDM symbol, all resource element RE can be used for ePHICH, in this OFDM symbol, definition is for 3 REG of ePHICH; And

While there is demodulated reference signal DMRS, channel condition information measuring reference signals CSI-RS, synchronizing signal PSS/SSS in an OFDM symbol, in this OFDM symbol, do not define any REG for ePHICH.

7. method according to claim 5, wherein, for the PRB of dissimilar subframe, predefined resource group REG can adopt unified form, also can adopt different forms.

8. method according to claim 7, wherein,

For regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH;

For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

9. method according to claim 1, also comprises:

With identical antenna port, transmit ePHICH and ePDCCH-CSS.

10. method according to claim 1, also comprises:

With identical launch scenario, transmit ePHICH and ePDCCH-CSS.

11. 1 kinds of base stations, comprising:

Codeword sequence generation unit, is configured to the enhancement mode physical mixing retransmission indicating chanel ePHICH information bit that generation comprises the system information of described base station;

EPHICH sequence generation unit, is configured to ePHICH information bit to carry out repeated encoding, modulation and spread spectrum, to produce ePHICH sequence; And the ePHICH sequence producing is carried out code division multiplexing and interweaved, obtain ePHICH group sequence;

Physical Resource Block PRB selected cell, is configured to select PRB from the occupied Physical Resource Block PRB of the public search space CSS of enhancement mode physical downlink control channel ePDCCH; And

Map unit, is configured to be identified at according to Serving cell the resource mapping of carrying out ePHICH group sequence in the PRB of selection.

12. base stations according to claim 11, wherein, described ePHICH sequence generation unit is configured to: by described ePHICH information bit repeated encoding m time, m is positive integer.

13. base station according to claim 11, wherein, described ePHICH sequence generation unit is configured to: the ePHICH information bit after repeated encoding is carried out to binary phase shift keying BPSK modulation and quadrature Walsh spread spectrum, to produce ePHICH sequence.

14. base stations according to claim 11, wherein, described PRB selected cell is configured to: according to the configuring condition of the ePHICH group of subframe and Serving cell sign, from the occupied physical resource module PRB of the CSS of ePDCCH, select PRB.

15. base stations according to claim 11, wherein, the resource mapping of ePHICH group sequence is with resource ZuREGWei unit, and each ePHICH group sequence is corresponding to m resource group, and m is the repeated encoding number of times of ePHICH information bit.

16. base stations according to claim 15, wherein, for a PRB,

While there is cell special reference CRS in an OFDM symbol, in this OFDM symbol, pre-define 2 REG for ePHICH;

When in an OFDM symbol, all resource element RE can be used for ePHICH, in this OFDM symbol, definition is for 3 REG of ePHICH; And

While there is demodulated reference signal DMRS, channel condition information measuring reference signals CSI-RS, synchronizing signal PSS/SSS in an OFDM symbol, in this OFDM symbol, do not define any REG for ePHICH.

17. base stations according to claim 15, wherein, for the PRB of dissimilar subframe, predefined resource group REG can adopt unified form, also can adopt different forms.

18. base stations according to claim 17, wherein,

For regular circulation prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH;

For extended cyclic prefix, for the PRB of dissimilar subframe, take unified REG form for mapping ePHICH.

19. base stations according to claim 11, also comprise:

Transmission unit, is configured to transmit ePHICH and ePDCCH-CSS with identical antenna port.

20. base stations according to claim 11, also comprise:

Transmission unit, is configured to transmit ePHICH and ePDCCH-CSS with identical launch scenario.