CN109756313B

CN109756313B - Method for allocating PHICH resources in special LTE FDD cell

Info

Publication number: CN109756313B
Application number: CN201711066459.1A
Authority: CN
Inventors: 魏立梅; 袁乃华; 范晨; 朱玉梅; 周志宏
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2017-11-02
Filing date: 2017-11-02
Publication date: 2021-04-16
Anticipated expiration: 2037-11-02
Also published as: CN109756313A

Abstract

The application discloses a PHICH resource allocation method, which is applied to a special LTE FDD cell and comprises the following steps: numbering all uplink carriers in a special LTE FDD cell, and when UE accesses the special LTE FDD cell, the eNodeB configures the uplink carriers for the UE; when each uplink sub-frame carries out scheduling of each uplink carrier, the eNodeB sends uplink scheduling information to the UE through the PDCCH; the UE transmits a corresponding PUSCH on a corresponding uplink carrier by adopting a corresponding uplink resource according to the detected uplink scheduling information on the PDCCH; and the UE calculates a subscript pair adopted by the PHICH corresponding to each transport block TB on the sent PUSCH, detects the PHICH on the PHICH resource corresponding to the subscript pair and obtains ACK/NACK information of the corresponding TB. By applying the technical scheme disclosed by the application, the problem of how to feed back the PHICH of the PUSCH on each uplink auxiliary carrier in a special LTE FDD cell can be solved.

Description

Method for allocating PHICH resources in special LTE FDD cell

Technical Field

The application relates to the technical field of communication, in particular to a method for allocating PHICH resources in a special LTE FDD cell.

Background

Currently, Frequency Division Duplex (FDD) cells in LTE systems in 3GPP protocols have a pair of carriers: an uplink carrier and a downlink carrier. The downlink carrier transmits a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The UE can know that: the physical layer cell ID of the cell, the duplex mode of the cell, and the radio frame timing and subframe timing of the cell. Then, the UE can determine the lower two bits of the radio frame number in the cell and the number of antenna ports for sending CRS by the cell downlink by detecting the PBCH, and can know through a Master Information Block (MIB) carried on the PBCH: the downlink bandwidth of the cell, the group number of a physical hybrid automatic repeat indicator channel (PHICH) and the upper 8 bits of a cell radio frame number.

After obtaining the above information, the UE may receive a Physical Control Format Indicator Channel (PCFICH) in each downlink subframe, and determine the length of the Control region of the current subframe according to a Control Format Indicator (CFI) carried on the PCFICH. Then, the UE may detect a Physical Downlink Control Channel (PDCCH) in a search space corresponding to the PDCCH in the current subframe control region:

the UE can obtain SIB1 and other various System Information Blocks (SIBs) through the PDCCH scrambled by the detected system information-radio network temporary identity (SI-RNTI), from which all configuration information of the cell is obtained;

the UE can obtain paging information through the PDCCH scrambled by the detected paging-radio network temporary identity (P-RNTI);

the UE in an RRC CONNECTED state (RRC _ CONNECTED) can obtain uplink or downlink scheduling information by detecting a PDCCH scrambled by a cell-radio network temporary identifier (C-RNTI); uplink or downlink semi-persistent scheduling information can be obtained by detecting the PDCCH scrambled by the SPSC-RNTI;

by detecting PDCCH scrambled with other types of RNTI, the UE may also obtain other types of control information, such as:

after a Physical Random Access Channel (PRACH) is sent in the random access process, the UE can obtain the scheduling information of RAR by detecting a PDCCH scrambled by RA-RNTI;

when receiving a Multimedia Broadcast Multicast Service (MBMS) transmitted in a multicast/multicast single frequency network (MBSFN) manner, UE can obtain an MBMS Control Channel (MCCH) change notification by detecting a PDCCH scrambled by an M-RNTI;

when receiving an MBMS service transmitted in a single cell point-to-multipoint (SC-PTM) mode, a UE can obtain a single cell MBMS control channel (SC-MCCH) change notification by detecting a PDCCH scrambled by a single cell-radio network temporary identifier (SC-RNTI).

After detecting the PDCCH scrambled by the C-RNTI, the UE in RRC _ CONNECTED may perform corresponding processing according to specific scheduling information carried on the PDCCH: when the PDCCH bears uplink scheduling information, the UE sends a Physical Uplink Shared Channel (PUSCH) according to the scheduling information, receives a PHICH fed back by an eNodeB according to a time sequence relation between the PUSCH and the PHICH, and bears acknowledgement/non-acknowledgement (ACK/NACK) information of a Transport Block (TB) on the PUSCH on the PHICH; when the PDCCH bears downlink scheduling information, the UE receives a Physical Downlink Shared Channel (PDSCH) according to the scheduling information, and sends the PUCCH according to the time sequence relation between the PDSCH and the PUCCH, and the PUCCH bears ACK/NACK information of TB on the PDSCH.

After detecting the PDCCH scrambled by the SPS C-RNTI, the UE in RRC _ CONNECTED may perform corresponding processing according to specific semi-persistent scheduling information carried on the PDCCH: when the PDCCH bears the uplink semi-persistent scheduling activation information, the UE determines the resource allocation of a semi-persistent PUSCH according to the information, periodically sends the PUSCH according to the allocation information, receives the PUSCH which is fed back by the eNodeB and corresponds to the sending of the PUSCH according to the time sequence relation between the PUSCH and the PHICH after each PUSCH sending, and bears the ACK/NACK information of the TB on the PUSCH; when the PDCCH bears the downlink semi-static scheduling activation information, the UE determines the resource allocation of the semi-static PDSCH according to the information, periodically receives the PDSCH according to the allocation information, sends the PUCCH according to the time sequence relation between the PDSCH and the PUCCH after receiving the PDSCH every time, and bears the ACK/NACK information of the TB on the PDSCH.

The above is an overview of the respective functions performed by the UE in the FDD cell in the LTE system. However, in an actual networking, there is a scenario in which: there are a pair of FDD carriers and also one or more carriers of different frequency points. The frequency points of the different frequency point carriers are different from the frequency points of a pair of FDD carriers, and the different frequency point carriers are only used for uplink transmission. In practical service application, there are service demands for video uploading in many scenes, and the demand for uplink bandwidth in a cell is far greater than the demand for downlink bandwidth. Aiming at an actual networking scene and a service application scene, the problem that how to use a pair of FDD carriers and one or more carriers with different frequency points solves the problem that the uplink bandwidth requirement in a cell is far greater than the downlink bandwidth requirement in actual application needs to be solved.

Disclosure of Invention

The application provides a method for allocating PHICH resources in a special LTE FDD cell, which is used for solving the problem of how to feed back PHICH of PUSCH on each uplink auxiliary carrier in the special LTE FDD cell.

The application discloses a PHICH resource allocation method, which is applied to a special LTE FDD cell, and if a PDCCH in a PDCCH search space in a control domain on a unique downlink carrier is used in the special LTE FDD cell to schedule each uplink carrier, the method comprises the following steps:

A. numbering all uplink carriers in the special LTE FDD cell, configuring uplink carriers for the UE by the eNodeB when the UE is accessed into the special LTE FDD cell, and carrying subscripts, frequency points and bandwidth information of the carriers in uplink carrier configuration information sent to the UE for each uplink carrier configured to the UE;

B. when each uplink sub-frame carries out scheduling of each uplink carrier, the eNodeB sends uplink scheduling information to the UE through the PDCCH;

C. the UE transmits a corresponding PUSCH on a corresponding uplink carrier by adopting a corresponding uplink resource according to the detected uplink scheduling information on the PDCCH;

D. and the UE calculates a subscript pair adopted by the PHICH corresponding to each transport block TB on the sent PUSCH, detects the PHICH on the PHICH resource corresponding to the subscript pair and obtains ACK/NACK information of the corresponding TB.

Preferably, all uplink carriers share the PHICH resource in the control domain PHICH space on the only downlink carrier, the number of PHICH groups and the duration of the PHICH included in the PHICH space depend on 3-bit PHICH configuration information on PBCH on the cell downlink carrier, and the RE mapping mode of the PHICH space and each PHICH channel in the control domain is the same as that of the PHICH space and each PHICH channel in the common FDD cell.

Preferably, in the B, the eNodeB carries a carrier indication field in a corresponding DCI format on the PDCCH carrying the uplink scheduling information of the uplink carrier, and the value of the field is the number of the uplink carrier scheduled by the PDCCH; when a carrier indication domain exists on the PDCCH, the bit number occupied by the resource allocation domain on the PDCCH is set according to the bandwidth of an uplink carrier scheduled by the PDCCH, a PDCCH search space in a control domain is divided into a corresponding number of sub-search spaces according to the number of the uplink carrier, each uplink carrier corresponds to one sub-search space, and the PDCCH of one uplink carrier is scheduled to be sent in the sub-search space corresponding to the uplink carrier.

Preferably, in the step C, the UE transmits the corresponding PUSCH on the corresponding uplink carrier by using the corresponding uplink resource according to the value of the carrier indication domain and the value of the resource allocation domain in the uplink scheduling information on the PDCCH scrambled by the detected C-RNTI.

Preferably, after the eNodeB determines that an uplink carrier is scheduled for the PUSCH of a UE, if the eNodeB finds: when the PUSCH and a PUSCH on a previously scheduled uplink carrier correspond to the same PHICH subscript pair, the eNodeB adjusts the scheduling information of any PUSCH so as to ensure that each PUSCH corresponds to different PHICH subscript pairs; and when two different PUSCHs corresponding to the same PHICH subscript pair cannot be avoided, cancelling the scheduling of any PUSCH.

The application also discloses a PHICH resource allocation method, which is applied to a special LTE FDD cell, and if the special LTE FDD cell uses a PDCCH (physical Downlink control channel) with a newly-added data field to search a space for scheduling uplink auxiliary carrier, the method comprises the following steps:

B. when each uplink sub-frame carries out scheduling of each uplink carrier, the eNodeB sends uplink scheduling information to the UE through the corresponding PDCCH;

D. UE calculates a subscript pair adopted by a PHICH corresponding to each transport block TB on a PUSCH, and the PHICH is detected on a PHICH resource corresponding to the subscript pair to obtain ACK/NACK information of the corresponding TB;

when the newly added PDCCH search space is dedicated to an uplink auxiliary carrier, the corresponding PDCCH in the B is sent in the newly added PDCCH search space corresponding to the uplink auxiliary carrier;

when a PDCCH search space newly added in the data domain is shared by a plurality of uplink auxiliary carriers or all uplink auxiliary carriers, the corresponding PDCCH in B is: and carrying a carrier number indication domain in a DCI format on the PDCCH which carries the uplink scheduling information and is sent in the PDCCH search space, wherein the domain carries the number of the scheduled uplink auxiliary carrier.

Preferably, the number of bits of the resource allocation field in the DCI format is set according to the bandwidth of the corresponding uplink carrier.

Preferably, when the eNodeB schedules each uplink carrier, it needs to ensure that subscript pairs adopted by the PHICHs corresponding to the PUSCHs on each scheduled uplink carrier are different; and when the scheduling cannot be avoided, only one PUSCH is scheduled in the PUSCHs corresponding to the same subscript pair, and the scheduling of other PUSCHs is cancelled.

According to the technical scheme, the problem of how to feed back the PHICH of the PUSCH on each uplink auxiliary carrier in the special LTE FDD cell can be solved.

Drawings

Fig. 1 is a schematic diagram of a method for allocating PHICH resources in a special LTE FDD cell according to the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.

Aiming at the requirement of uplink large bandwidth for uploading video and the conditions of a pair of available FDD carriers and one or more available uplink carriers with different frequency points in an actual networking scene, a special FDD cell can be established in an LTE system: the cell comprises a pair of FDD carriers and one or more different frequency point uplink carriers. In a pair of FDD carriers of a cell, the downlink carrier is the only downlink carrier in the special FDD cell, and the uplink carrier is the uplink main carrier of the special FDD cell. All the different-frequency point uplink carriers in the cell are uplink auxiliary carriers of the cell.

In this particular FDD cell, the FDD frame structure is used: the single downlink carrier and each uplink carrier adopt FDD frame structure. The single downlink carrier in the cell performs all functions of the common downlink carrier in the FDD cell in the same manner, and the single uplink main carrier in the cell performs all functions of the common uplink carrier in the FDD cell in the same manner.

There are two types of UEs accessing this special FDD cell:

(1) and (3) common UE: these UEs perform the respective functions of the normal FDD intra-cell UEs in the same manner. For these UEs, the cell is a normal FDD cell, which consists of only one pair of FDD carriers: UE-related uplink transmission is performed on the uplink primary carrier, and UE-related downlink transmission is performed on the unique downlink carrier. These UEs are not aware of the presence of other uplink secondary carriers at all for the cell.

(2) UE supporting special LTE FDD cells: such UEs report the capability of supporting a special FDD cell when accessing the cell. If the cell accessed by the UE is a common FDD cell, the eNodeB ignores the capability report; if the cell accessed by the UE is a special FDD cell, the eNodeB distributes uplink carriers to the UE according to the capability report: only the uplink primary carrier may be allocated to the UE, or at least two uplink carriers may be allocated to the UE at the same time, where the allocated uplink carriers may include the uplink primary carrier or may not include the uplink primary carrier. For such UE, after the UE accesses the special FDD cell, the eNodeB carries an indication of the special FDD cell when allocating resources to the UE, or indicates that the current cell is the special FDD cell in an implicit indication manner through the allocated uplink carrier, for example: the allocated certain uplink carrier and the downlink carrier are not paired carriers.

For this particular LTE FDD cell, there are problems to be solved: how to schedule each uplink secondary carrier and how to feed back PHICH of PUSCH on each uplink secondary carrier

The present invention presents a solution to the above-mentioned problems in special LTE FDD cells.

Currently, each PHI in a common FDD cell or TDD cell in the 3GPP protocolSubscript pair for resource occupied by CH channel in PHICH resource space

And (5) identifying.

Is the group number of the PHICH,

are subscripts to the orthogonal sequences within the group. After the UE sends the PUSCH, it needs to receive ACK/NACK information of each TB on the PUSCH fed back by the eNodeB. Specifically, ACK/NACK information of different TBs on the PUSCH is fed back through different PHICHs, and the UE determines a subscript pair adopted by the PHICH corresponding to each TB according to the scheduling information of the PUSCH and the formula (1)

In the above formula, the respective parameters are defined as follows:

wherein the content of the first and second substances,

is a subscript of the lowest PRB of the first slot in the corresponding PUSCH transmission.

n_DMRS: determined by the value of the cyclic shift in the DMRS domain on PDCCH that schedules TBs on PUSCH. If there is no corresponding PDCCH for scheduling, or the initial transmission of the same transport block is authorized by a random access response, or the initial transmission of the same transport block is semi-persistent scheduling, then n_DMRSShould be 0.

The number of PHICH groups.

And spreading factors adopted in PHICH modulation.

UE pairs at each subscript determined by the above method

And detecting a corresponding PHICH on the corresponding PHICH resource to obtain ACK/NACK information of a certain TB on a PUSCH carried on the PHICH.

For a special LTE FDD cell, PUSCH can be transmitted on both the uplink primary carrier and each uplink secondary carrier, and therefore, the following problems need to be solved:

(1) how are PHICH resources allocated on the cell-unique downlink carrier to the PHICH corresponding to PUSCH on each uplink carrier?

(2) May the bandwidth of each uplink carrier be different, how can each uplink carrier with possibly different bandwidth be scheduled on the PDCCH?

The invention provides a scheduling method of uplink carriers with different bandwidths in a special LTE FDD cell and a PHICH resource allocation method. The method provides a specific implementation method for different scenes.

Scene one: scheduling each uplink carrier in a PDCCH search space on a control domain on a unique downlink carrier in a special LTE FDD cell

The first step is as follows: the numbers are numbered for all uplink carriers in a special LTE FDD cell, starting from 0 and ending at C-1. Where C is the number of intracell uplink carriers. When the UE accesses a special LTE FDD cell, the eNodeB configures uplink carriers for the UE, and for each uplink carrier configured for the UE, the uplink carrier configuration information sent to the UE carries information such as subscript, frequency point, bandwidth and the like of the carrier. Agreement between eNodeB and UE: all uplink carriers share the PHICH resources in the PHICH space in the control domain on the unique downlink carrier. The number of PHICH groups and the duration of PHICH included in the PHICH space depend on 3 bits of PHICH configuration information on PBCH on a cell downlink carrier. The RE mapping mode of the PHICH space and each PHICH channel in the control domain is the same as that of the PHICH space and each PHICH channel in a common FDD cell.

The second step is that: and when each uplink subframe carries out scheduling of each uplink carrier, the eNodeB sends the uplink scheduling information to the UE through the PDCCH. A Carrier indication field (Carrier indicator) is carried in a corresponding DCI format on a PDCCH carrying scheduling information of a certain uplink Carrier, and the value of the field is the number of the uplink Carrier scheduled by the PDCCH. When a carrier indication domain exists on the PDCCH, the bit number occupied by the resource allocation domain on the PDCCH is set according to the bandwidth of an uplink carrier scheduled by the PDCCH. When the PDCCH carries a carrier indication domain, a PDCCH search space in a control domain is divided into a plurality of sub-search spaces according to the number of an uplink carrier, each uplink carrier corresponds to one sub-search space, and the PDCCH of a certain uplink carrier is scheduled to be sent in the sub-search space corresponding to the uplink carrier.

The third step: and the UE transmits the corresponding PUSCH on the corresponding uplink carrier by adopting the corresponding uplink resource according to the value of the carrier indication domain and the value of the resource allocation domain in the detected uplink scheduling information on the PDCCH scrambled by the C-RNTI.

The fourth step: UE calculates subscript pairs adopted by PHICH corresponding to each TB on the sent PUSCH according to formula (1)

And detecting the PHICH on the PHICH resource corresponding to the subscript pair to obtain the ACK/NACK information of the corresponding TB.

And when the ACK/NACK information of the TB on the PHICH is NACK, the UE retransmits the corresponding TB. The resources adopted for retransmitting the TB are the following two cases, which are the same as the processing procedure of PUSCH retransmission in a normal FDD cell:

(1) and retransmitting the TB fed back as NACK by using the resource occupied by the PUSCH for transmitting the TB for the first time, wherein if the TB is transmitted for the first time, two TBs exist on the PUSCH, and only the TB fed back as NACK is transmitted during retransmission.

(2) And if the retransmission scheduling information on the PDCCH scrambled by the C-RNTI is detected in the same subframe receiving the PHICH, retransmitting the TB fed back as the NACK on the newly determined PUSCH resource according to the information.

In the second step of the method, when the eNodeB schedules each uplink carrier, it needs to ensure the subscript pair adopted by the PHICH corresponding to the PUSCH on each scheduled uplink carrier

Are different from each other. After the eNodeB determines that a certain uplink carrier is scheduled to the PUSCH of a certain UE, if the eNodeB finds: the PUSCH and a PUSCH on a previously scheduled uplink carrier correspond to the same PHICH subscript pair

In order to avoid confusion of PHICH resources, the eNodeB may adjust scheduling information of a certain PUSCH, such as: adjusting a subscript of a first RB allocated to the PUSCH

And cyclic shift values DMRS (where two parameters are defined in formula (1) above) to ensure that each PUSCH corresponds to a different respective pair of PHICH indices. If the occurrence of two different PUSCHs corresponding to the same PUSCH cannot be avoided

And canceling the scheduling of one PUSCH.

If the PDCCH in the PDCCH search space in the control domain is not enough or is not used for scheduling some or all uplink secondary carriers, a PDCCH search space may be newly added in the data domain, and the newly added PDCCH search space has the following two types:

(1) the PDCCH searching space newly added in the data field corresponds to a certain uplink auxiliary carrier and is special for the uplink auxiliary carrier.

(2) The PDCCH search space newly added in the data domain corresponds to a plurality of uplink auxiliary carriers or all uplink auxiliary carriers and is shared by the plurality of uplink auxiliary carriers or all uplink auxiliary carriers. The space can be divided into a plurality of sub-search spaces, the one-to-one correspondence relationship between the subscripts of the uplink carriers and the sub-search spaces is determined, and each uplink carrier uses a proprietary sub-search space. Or not dividing the sub-search space, allowing all related uplink carriers to share the search space, and only carrying the serial number of the uplink carrier scheduled by the carrier indication field indication on the PDCCH.

Scene two: scheduling uplink auxiliary carrier in data domain newly-added PDCCH search space

Under the scene that a PDCCH searching space is newly added in a data domain, the method for scheduling the uplink auxiliary carrier through the PDCCH on the newly added PDCCH searching space and allocating resources to the PHICH corresponding to the PUSCH on the uplink auxiliary carrier comprises the following steps:

first, contract: and the PUSCH on each uplink carrier shares the PHICH resource in the PHICH space on the unique downlink carrier.

When the newly added PDCCH search space corresponds to a certain uplink auxiliary carrier and is dedicated to the uplink auxiliary carrier, a carrier number indication field does not need to be carried in a DCI format on the PDCCH carrying the uplink carrier scheduling information and sent by the search space, and the bit number of a resource allocation field in the DCI format is set according to the bandwidth of the uplink carrier. Correspondingly, the UE calculates a PHICH subscript pair corresponding to the PUSCH on the uplink carrier according to the formula (1), and detects a corresponding PHICH on a PHICH resource corresponding to the subscript pair in a PHICH space in a control domain on the downlink carrier to obtain ACK/NACK information on the PHICH.

When a PDCCH search space newly added in a data field is shared by a plurality of uplink auxiliary carriers or all uplink auxiliary carriers, a carrier number indication field needs to be carried in a DCI format on the PDCCH carrying the uplink carrier scheduling information sent in the search space, the field carries the number of the scheduled uplink carrier, and the bit number of a resource allocation field in the DCI format is set according to the bandwidth of the uplink carrier. Correspondingly, the UE calculates a PHICH subscript pair corresponding to the PUSCH on the uplink carrier according to the formula (1), and detects a corresponding PHICH on a PHICH resource corresponding to the subscript pair in a PHICH space in a control domain on the downlink carrier to obtain ACK/NACK information on the PHICH.

No matter which newly-added PDCCH search space is adopted, when the eNodeB schedules each uplink carrier, the subscript pair adopted by the PHICH corresponding to the PUSCH on each scheduled uplink carrier needs to be ensured

Are different from each other. And if the scheduling cannot be avoided, only one PUSCH is scheduled in the PUSCHs corresponding to the same subscript pair, and the scheduling of other PUSCHs is cancelled.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for allocating PHICH resources is applied to a special LTE FDD cell, wherein the special LTE FDD cell comprises a pair of FDD carriers and one or more uplink carriers with different frequency points, and if the PDCCH in a PDCCH search space in a control domain on a unique downlink carrier is used in the special LTE FDD cell to schedule each uplink carrier, the method comprises the following steps:

A. numbering all uplink carriers in the special LTE FDD cell, when the UE is accessed into the special LTE FDD cell, the eNodeB configures the uplink carriers for the UE, and for each uplink carrier configured for the UE, the subscript, the frequency point and the bandwidth information of the carrier are carried in the uplink carrier configuration information sent to the UE;

B. when each uplink sub-frame carries out scheduling of each uplink carrier, the eNodeB sends uplink scheduling information to the UE through the PDCCH; specifically, an eNodeB carries a carrier indication field in a corresponding DCI format on a PDCCH carrying uplink scheduling information of an uplink carrier, where the value of the field is a number of the uplink carrier scheduled by the PDCCH; when a carrier indication domain exists on a PDCCH, the bit number occupied by a resource allocation domain on the PDCCH is set according to the bandwidth of an uplink carrier scheduled by the PDCCH, a PDCCH search space in a control domain is divided into a corresponding number of sub-search spaces according to the number of the uplink carrier, each uplink carrier corresponds to one sub-search space, and the PDCCH of one uplink carrier is scheduled to be sent in the sub-search space corresponding to the uplink carrier;

2. The method of claim 1, wherein:

and all uplink carriers share PHICH resources in a control domain PHICH space on a unique downlink carrier, the number of PHICH groups and the duration of the PHICH included in the PHICH space depend on 3 bits of PHICH configuration information on a PBCH on a cell downlink carrier, and the RE mapping mode of the PHICH space and each PHICH channel in the control domain is the same as that of a common FDD cell PHICH space and each PHICH channel.

3. The method according to claim 1 or 2, characterized in that:

in the step C, the UE transmits the corresponding PUSCH on the corresponding uplink carrier by adopting the corresponding uplink resource according to the value of the carrier indication domain and the value of the resource allocation domain in the uplink scheduling information on the PDCCH scrambled by the detected C-RNTI.

4. The method according to claim 1 or 2, characterized in that:

after the eNodeB determines that an uplink carrier is scheduled for the PUSCH of a UE, if the eNodeB finds: when the PUSCH and a PUSCH on a previously scheduled uplink carrier correspond to the same PHICH subscript pair, the eNodeB adjusts the scheduling information of any PUSCH so as to ensure that each PUSCH corresponds to different PHICH subscript pairs; and when two different PUSCHs corresponding to the same PHICH subscript pair cannot be avoided, cancelling the scheduling of any PUSCH.

5. A PHICH resource allocation method is applied to a special LTE FDD cell, wherein the special LTE FDD cell comprises a pair of FDD carriers and one or more uplink carriers with different frequency points, and is characterized in that if a PDCCH (physical Downlink control channel) with a newly added data field is used in the special LTE FDD cell to search a space and schedule an uplink auxiliary carrier, the method comprises the following steps:

6. The method of claim 5, wherein:

and the bit number of the resource allocation domain in the DCI format is set according to the bandwidth of the corresponding uplink carrier.

7. The method according to claim 5 or 6, characterized in that:

when the eNodeB schedules each uplink carrier, subscript pairs adopted by PHICHs corresponding to PUSCHs on each scheduled uplink carrier need to be ensured to be different; and when the scheduling cannot be avoided, only one PUSCH is scheduled in the PUSCHs corresponding to the same subscript pair, and the scheduling of other PUSCHs is cancelled.