JP2013214946A - Method and apparatus for transmitting physical hybrid automatic repeat request indicator channel information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for determining the position of a downlink subframe for feedback or reception of a physical hybrid automatic repeat request indicator channel (PHICH).SOLUTION: A base station determines, on the basis of an almost blank subframe (ABS) pattern thereof, a downlink subframe for feedback of PHICH information corresponding to uplink data that is transmitted in each uplink subframe. When the base station receives uplink data from user equipment (UE), the base station feeds back PHICH information corresponding to the uplink data in the determined downlink subframe.

Description

  The present invention relates to mobile communication technology, and more particularly, to a method and apparatus for transmitting Physical Hybrid Automatic ARQ Indicator Channel (PHICH) information in a heterogeneous network.

  Cellular mobile phones bring tremendous convenience to people's communication, and the second generation global mobile communication system (GSM (registered trademark)) adopts digital communication to further improve the call quality of mobile communication Let The 3rd Generation Partnership Project (3GPP) is an important organization in the mobile communication field, and greatly promotes the standardization of the 3rd generation mobile communication technology (3G: The Third Generation). Connection (WCDMA: Wide Speed Multiple Access), High Speed Downlink Packet Access (HSDPA: High Speed Downlink Packet Access), High Speed Uplink Packet Access (HSUPA: High Speed Uplinks) did.

  3GPP has begun standardization of LTE (Long Term Evolution) technology from the end of 2004 to meet the challenges of broadband access technology and meet the increasing demand for new services Therefore, the spectrum efficiency is further improved, the performance of the cell edge user is improved, the system delay is reduced, and a higher-speed access service is provided to a high-speed mobile user. Future improved LTE (LTE-A) technology further spreads heterogeneous networks based on LTE, increasing spectrum bandwidth several times, doubling data rate, to more mobile users, Provide services that are even faster and have better performance.

  In a heterogeneous network, within the coverage of a macro cell, for example, a pico cell base station, a home base station (HeNB), a femto cell base station, a relay (Relay), a remote radio head (RRH: Various new types of low power base station nodes such as Remote Radio Head) are deployed.

  In the existing LTE version 8/9/10 (R8 / 9/10) system, the base station allocates uplink transmission resources to the user by transmitting an uplink scheduling command. For example, the base station transmits an uplink scheduling command to a certain user in the downlink subframe T, and the user performs uplink transmission in the uplink subframe T + 4, that is, the uplink subframe T + 4 is in the downlink subframe T + 4. This is an uplink subframe corresponding to the frame T. After receiving the uplink data transmitted by the user in the uplink subframe T + 4, the base station transmits physical hybrid automatic retransmission request indication channel (PHICH) information, that is, downlink ACK / NACK, in the downlink subframe T + 8. Feedback information.

  In a heterogeneous scenario, since the macro cell base station and the low power base station operate in the same frequency band, there is a possibility that the demodulation performance may deteriorate due to intense interference between downlink control channels or signals. As a result, the performance of the system is affected. Currently, in the R10 system, in order to avoid interference between a macro base station and a low power base station, an all-blank blank subframe (ABS: Almost Blank Subframe) is provided on the interfering base station side that causes interference to other base stations. It has already been determined that interference with other interfered base stations can be reduced by setting (). In this way, the interfered base station can schedule the interfered user at a position set as ABS in the interference base station. In addition, in order to guarantee compatibility with the R8 / 9 system, the system information block 1 / paging opportunity (SIB1 / PO) information can be transmitted by the ABS. The scheduling command cannot be transmitted. That is, since the base station cannot transmit an uplink scheduling command to the user through the ABS, it cannot transmit uplink data at the position of the uplink subframe corresponding to the ABS. For example, when the downlink subframe T is set as ABS, the user cannot perform uplink transmission in the uplink subframe T + 4. As is apparent, this causes a situation where upstream resources are wasted.

  Based on the above situation, a cross-subframe scheduling method has already been proposed. By cross subframe scheduling, the base station sends an uplink scheduling command to the user in one downlink subframe, thereby instructing the user to perform uplink data transmission in any subsequent uplink subframe. In other words, even if the downlink subframe T is an ABS, the base station performs uplink transmission to the user in the uplink subframe T + 4 using another downlink subframe by the cross subframe scheduling method. Can be directed. This effectively solves the situation where uplink resources are wasted.

  However, in the case of cross subframe scheduling, how to determine the position of the downlink subframe for feedback of PHICH information is one of the problems to be solved at present.

  In order to solve the above-described problem, the embodiment of the present invention provides a method and apparatus for transmitting physical hybrid automatic repeat request instruction channel information.

  According to the physical hybrid automatic repeat request indication channel (PHICH) information transmission method provided in the embodiment of the present invention, the base station uses each of the uplink subframes based on its own most blank subframe (ABS) pattern. When a downlink subframe for feedback of PHICH information corresponding to uplink data to be transmitted is determined and uplink data from a user terminal (UE) is received, PHICH information corresponding to the uplink data in the determined downlink subframe Including feedback.

  Here, based on the ABS pattern of the local station, determining the downlink subframe for feedback of PHICH information corresponding to the uplink data transmitted in each uplink subframe is based on the ABS pattern of the local station. Whether or not the downlink subframe corresponding to the subframe can be used is determined, and when the downlink subframe is usable, the corresponding downlink subframe is fed back to the PHICH information corresponding to the uplink data transmitted in the uplink subframe. If it is determined as a downlink subframe for use and cannot be used, a usable downlink subframe closest to the downlink subframe is searched based on the ABS pattern of the local station, and transmitted in the uplink subframe. It is set as a downlink subframe for feedback of PHICH information corresponding to uplink data. Including the door.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定する、ことを含み、ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す。 Determining whether or not the downlink subframe corresponding to each uplink subframe can be used respectively determines whether or not the downlink subframe corresponding to each uplink subframe is an ABS. The available downlink subframe nearest to the downlink subframe is searched based on the ABS pattern of the local station based on the ABS pattern of the local station. The condition that the downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the subframe is closest to the downlink subframe i + 4 after the downlink subframe i + 4 corresponding to the uplink subframe i.

And searching for a downlink subframe satisfying the following, and determining it as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in uplink subframe i, where U is one ABS pattern represents the total number of uplink subframes corresponding to, or D represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d is any number of PHICH information in one downlink sub-frame is fed back Represents the operator

Represents a round-up operation.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定してから、ステップ１０１５に進み、ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表すステップ１０１３と、
下りサブフレームｉ＋４を、上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定してから、ステップ１０１５に進むステップ１０１４と、
ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕより小さい場合、ｉ＝ｉ＋１にしてから、ステップ１０１２に戻り、ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕに等しい場合、本プロセスを終了するステップ１０１５と、を含む。 Based on the ABS pattern of the local station, determining a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in each uplink subframe is:
Step 1011 for setting the uplink subframe number i to be equal to 1,
Based on the ABS pattern of the local station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to Step 1013. If the downlink subframe i + 4 is not an ABS, Step 1014 is performed. Step 1012 to proceed to,
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above condition is searched and determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i, and then the process proceeds to step 1015, where U is 1 one of the total number of the uplink sub-frame corresponding to the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is what one PHICH information in one downlink sub-frame Represents feedback, operator

Is a step 1013 representing a round-up operation;
Step 1014 which proceeds to Step 1015 after determining the downlink subframe i + 4 as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 1012, and when i is equal to the total number U of uplink subframes corresponding to one ABS pattern, And 1010 ending the process.

  In the above method, a base station determines a method of determining a downlink subframe for receiving PHICH information by radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling. Further to notify.

  A physical hybrid automatic repeat request indication channel (PHICH) information transmission method provided in an embodiment of the present invention is based on an all-most blank subframe (ABS) pattern transmitted from a base station by a user terminal (UE). After determining the downlink subframe for receiving PHICH information corresponding to the uplink data transmitted in each uplink subframe and transmitting the uplink data, the PHICH information corresponding to the uplink data is determined in the determined downlink subframe. Including receiving.

  Here, based on the ABS pattern transmitted from the base station, determining the downlink subframe for receiving PHICH information corresponding to the uplink data transmitted in each uplink subframe is based on the ABS pattern transmitted from the base station. And determining whether or not the downlink subframe corresponding to each uplink subframe can be used, and if so, the corresponding downlink subframe is transferred to the uplink data transmitted in the uplink subframe. If it is determined that the corresponding PHICH information is received as a downlink subframe and cannot be used, the available downlink subframe closest to the downlink subframe is searched based on the ABS pattern transmitted from the base station. , Downlink subframes for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe. For an indefinite, including that.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定する、ことを含み、ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す。 Determining whether or not the downlink subframe corresponding to each uplink subframe can be used respectively determines whether or not the downlink subframe corresponding to each uplink subframe is an ABS. It becomes unavailable, if it is not an ABS, it becomes available,
Based on the ABS pattern transmitted from the base station, the available downlink subframe closest to the downlink subframe is searched, and the PHICH information receiving downlink corresponding to the uplink data transmitted in the uplink subframe is received. Subframe is a condition that corresponds to uplink subframe i and is closest to downlink subframe i + 4 after downlink subframe i + 4.

And searching for a downlink subframe satisfying the following, and determining it as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in uplink subframe i, where U is one ABS pattern represents the total number of uplink subframes corresponding to, or D represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d is any number of PHICH information in one downlink sub-frame is fed back Represents the operator

Represents a round-up operation.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定してから、ステップ３０１５に進み、ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表すステップ３０１３と、
下りサブフレームｉ＋４を、上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定してから、ステップ３０１５に進むステップ３０１４と、
ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕより小さい場合、ｉ＝ｉ＋１にしてから、ステップ３０１２に戻り、ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕに等しい場合、本プロセスを終了するステップ３０１５と、を含む。 Based on the ABS pattern transmitted from the base station, determining the downlink subframe for receiving PHICH information corresponding to the uplink data transmitted in each uplink subframe,
Step 3011 for setting the number i of the uplink subframe to be equal to 1,
Based on the ABS pattern transmitted from the base station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to step 3013, and the downlink subframe i + 4 is not an ABS. , Step 3012 proceeding to step 3014;
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above is searched and determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and then the process proceeds to step 3015, where U is 1 one of the total number of the uplink sub-frame corresponding to the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is what one PHICH information in one downlink sub-frame Represents feedback, operator

Is a step 3013 representing a round-up operation;
Step 3014 which proceeds to Step 3015 after determining the downlink subframe i + 4 as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 3012. When i is equal to the total number U of uplink subframes corresponding to one ABS pattern, And 3030 ending the process.

  In the above method, the UE uses a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE), and an operation / maintenance (O & M) signaling to receive a PHICH information receiving downlink subframe. Receiving the determination method.

  The base station provided in the embodiment of the present invention, based on its own most blank subframe (ABS) pattern, a physical hybrid automatic retransmission request indication channel (in response to uplink data transmitted in each uplink subframe) ( PHICH) first subframe determination means for determining a downlink subframe for feedback of information, and PHICH information corresponding to the uplink data in the determined downlink subframe after receiving uplink data from the user terminal (UE) And PHICH information feedback means.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定し、前記Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す第１検索モジュールと、を含む。 The first subframe determining means determines whether or not the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS based on the ABS pattern of the local station. If the downlink subframe i + 4 is not an ABS, the first subframe determination means , Which is determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in uplink subframe i, and triggers the first search module to search for an appropriate downlink subframe in the case of ABS. 1 decision module, condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above is searched and determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i, and U is an uplink subframe corresponding to one ABS pattern. represents the total number of, D is represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d represents how many PHICH information in one downlink sub-frame is fed back, the operator

Includes a first search module representing a round-up operation.

  The base station notifies the UE of how to determine the downlink subframe for receiving PHICH information through radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling. Further included is a notification means.

  A user terminal (UE) provided in an embodiment of the present invention is a physical hybrid corresponding to uplink data transmitted in each uplink subframe based on an almost blank subframe (ABS) pattern transmitted from a base station. Second subframe determining means for determining a downlink subframe for receiving automatic retransmission request instruction channel (PHICH) information, and PHICH information corresponding to the uplink data in the determined downlink subframe after transmitting uplink data Receiving PHICH information receiving means.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定し、前記Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す第２検索モジュールと、を含む。 The second subframe determining means determines whether or not the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS based on the ABS pattern transmitted from the base station. The frame i + 4 is determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and in the case of the ABS, the second search module is configured to search for an appropriate downlink subframe. The second decision module to trigger and the condition closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above condition is searched and determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and U is an uplink subframe corresponding to one ABS pattern. represents the total number of, D is represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d represents how many PHICH information in one downlink sub-frame is fed back, the operator

Includes a second search module representing a round-up operation.

  The above UE determines a PHICH information reception downlink subframe transmitted from a base station by radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling. Further includes receiving means for receiving.

  As can be seen from the above, according to the method and apparatus according to the embodiment of the present invention, the base station and the UE can determine the position of the downlink subframe for feedback or reception of PHICH information in the case of cross subframe scheduling. The problem of whether to decide can be solved.

5 is a flowchart on the base station side of a PHICH information transmission method according to an embodiment of the present invention. 5 is a flowchart of a method for determining a downlink subframe for feedback of PHICH information based on an ABS pattern of the base station in a method for transmitting PHICH information according to an embodiment of the present invention. 4 is a flowchart on the UE side of a PHICH information transmission method according to an embodiment of the present invention. 6 is a flowchart of a method for determining a downlink subframe for receiving PHICH information based on an ABS pattern of a base station in a method for transmitting PHICH information according to an embodiment of the present invention. It is a figure which shows the internal structure of the base station which concerns on the Example of this invention. It is a figure which shows the internal structure of UE which concerns on the Example of this invention.

  Embodiments of the present invention provide a method of transmitting PHICH information that can determine the position of a downlink subframe for feedback or reception of PHICH information in the case of cross subframe scheduling. Hereinafter, the method according to the present embodiment will be described in detail with reference to the drawings and specific examples.

FIG. 1 shows a flow on the base station side of a PHICH information transmission method when cross subframe scheduling according to the present embodiment is set. As shown in FIG.
Step 101 in which the base station determines a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in each uplink subframe based on the ABS pattern of the own station;
A step 102 of feeding back PHICH information corresponding to the uplink data of the UE in the determined downlink subframe when uplink data from the UE is received.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定することができる。ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す。 Hereinafter, with reference to the drawings and specific examples, the base station in Step 101 described above determines a downlink subframe for feedback of PHICH information corresponding to the uplink data of the UE based on the ABS pattern of the own station. The method of performing will be described in detail. In this method, the base station first determines whether or not the downlink subframe corresponding to each uplink subframe is usable based on the ABS pattern of the own station, and if it is usable, If a subframe is determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe and cannot be used, the subframe is assigned to the downlink subframe based on the ABS pattern of the local station. The nearest usable downlink subframe can be searched for and used as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe. Here, the base station can determine whether or not the downlink subframe is usable by determining whether or not the downlink subframe corresponding to each uplink subframe is an ABS. If it is, it becomes unusable, and if it is not ABS, it becomes usable. Further, based on the ABS pattern of the local station, a usable downlink subframe closest to the downlink subframe is searched, and a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe The base station is closest to the downlink subframe i + 4 after the downlink subframe i + 4 corresponding to the uplink subframe i.

It is possible to search for a downlink subframe satisfying the above and determine it as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i. Here, U is the total number of the uplink sub-frame corresponding to one of the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is a single downlink subframe Indicates how many PHICH information has been fed back, operator

Represents a round-up operation.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定してから、ステップ１０１５に進むステップ１０１３と、
下りサブフレームｉ＋４を、上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定してから、ステップ１０１５に進むステップ１０１４と、
ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕより小さい場合、ｉ＝ｉ＋１にしてから、ステップ１０１２に戻り、ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕに等しい場合、本プロセスを終了するステップ１０１５と、を含む。 FIG. 2 shows a specific method in which the base station determines a downlink subframe for feedback of PHICH information based on the ABS pattern of the local station in this embodiment. As shown in FIG. 2, the method mainly includes:
Step 1011 for setting the uplink subframe number i to be equal to 1,
Based on the ABS pattern of the local station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to Step 1013. Step 1012 to proceed to,
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

Step 1013 which searches for a downlink subframe satisfying and determines it as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in uplink subframe i, and then proceeds to Step 1015;
Step 1014 which proceeds to Step 1015 after determining the downlink subframe i + 4 as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 1012, and when i is equal to the total number U of uplink subframes corresponding to one ABS pattern, And 1010 ending the process.

  From the above steps 1011 to 1015, the base station can determine the positions of the downlink subframes for feedback of the PHICH information to be fed back in each uplink subframe corresponding to one ABS pattern, respectively, It can be assured that the PHICH information (downlink ACK / NACK information) is uniformly distributed in all available downlink subframes without being concentrated in a large number in some downlink subframes. Thereby, generation | occurrence | production of the condition of PHICH information blocking (PHICH Blocking) can be avoided effectively.

FIG. 3 shows a flow on the UE side of the PHICH information transmission method according to the present embodiment. As shown in FIG.
Step 301 in which the UE determines a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in each uplink subframe based on the ABS pattern transmitted from the base station;
Receiving the PHICH information corresponding to the uplink data in the determined downlink subframe after transmitting the uplink data.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定することができる。ここで、Ｕは１つのＡＢＳパターンに対応する上りサブフレームの総数を表し、Ｄは１つのＡＢＳパターンにおいてＡＢＳと設定されていない下りサブフレームの数を表し、Ｎ_ｄは１つの下りサブフレームで何個のＰＨＩＣＨ情報がフィードバックされたかを表し、演算子

は切り上げ演算を表す。 Hereinafter, referring to the drawings and specific examples, in step 301 described above, the UE determines a downlink subframe for receiving PHICH information corresponding to the uplink data based on the ABS pattern transmitted from the base station. The method of performing will be described in detail. In this method, the UE first determines whether or not the downlink subframe corresponding to each uplink subframe is usable based on the ABS pattern transmitted from the base station, and if it is usable, A downlink subframe to be received is determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe, and when it is not usable, further, based on the ABS pattern transmitted from the base station Thus, a usable downlink subframe closest to the downlink subframe is searched, and a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe can be obtained. Here, the UE can determine whether or not the downlink subframe is usable by determining whether or not the downlink subframe corresponding to each uplink subframe is an ABS. In some cases, it becomes unusable, and in case it is not an ABS, it becomes usable. Further, based on the ABS pattern transmitted from the base station, a usable downlink subframe closest to the downlink subframe is searched, and PHICH information corresponding to uplink data transmitted in the uplink subframe is received. In the downlink subframe, the UE is closest to the downlink subframe i + 4 after the downlink subframe i + 4 corresponding to the uplink subframe i.

A downlink subframe satisfying the above condition is searched, and it can be determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i. Here, U is the total number of the uplink sub-frame corresponding to one of the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is a single downlink subframe Indicates how many PHICH information has been fed back, operator

Represents a round-up operation.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定してから、ステップ３０１５に進むステップ３０１３と、
下りサブフレームｉ＋４を、上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定してから、ステップ３０１５に進むステップ３０１４と、
ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕより小さい場合、ｉ＝ｉ＋１にしてから、ステップ３０１２に戻り、ｉが１つのＡＢＳパターンに対応する上りサブフレームの総数Ｕに等しい場合、本プロセスを終了するステップ３０１５と、を含む。 FIG. 4 shows a specific method in which the UE determines a downlink subframe for receiving PHICH information based on the ABS pattern transmitted from the base station in the present embodiment. As shown in FIG. 4, the method mainly includes:
Step 3011 for setting the number i of the uplink subframe to be equal to 1,
Based on the ABS pattern transmitted from the base station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to step 3013, and the downlink subframe i + 4 is not an ABS. , Step 3012 proceeding to step 3014;
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

Step 3013 which searches for a downlink subframe satisfying and determines it as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in uplink subframe i, and then proceeds to Step 3015;
Step 3014 which proceeds to Step 3015 after determining the downlink subframe i + 4 as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 3012. When i is equal to the total number U of uplink subframes corresponding to one ABS pattern, And 3030 ending the process.

  From steps 3011 to 3015 described above, the UE can determine a downlink subframe for receiving PHICH information corresponding to each uplink subframe in one ABS pattern, and can also determine PHICH information (downlink ACK / NACK) of the entire system. Information) can be guaranteed to be evenly distributed over all available downlink subframes without concentrating in large numbers on several downlink subframes. Thereby, the occurrence of the situation of PHICH information blocking can be effectively avoided.

  Further, as can be seen from the above method, in order for the UE to determine the downlink subframe for receiving PHICH information, the base station needs to notify the UE of the ABS pattern of the base station. Specifically, the base station can notify the UE of the ABS pattern of the base station based on system information such as MAC CE and RRC signaling.

  Further, it should be explained that the base station determines a downlink subframe for feedback of PHICH information based on its own ABS pattern, and that the UE is based on the ABS pattern transmitted from the base station. In addition, the method for determining the downlink subframe for receiving the PHICH information can be arranged in advance in the base station and the UE, respectively. Further, the above-described method for determining the downlink subframe for receiving PHICH information based on the ABS pattern transmitted from the base station by the UE may be arranged in the UE by the base station. Specifically, the base station notifies the UE of the method by system information such as radio resource control (RRC) signaling, medium access control (MAC) control element (CE), operation and maintenance (O & M) signaling, for example. The UE can receive the PHICH information reception subframe transmitted from the base station by radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation and maintenance (O & M) signaling. Receive the decision method.

Corresponding to the above method, this embodiment also provides a base station and a UE for performing the above method. Here, as shown in FIG. 5, the internal configuration of the base station is mainly:
A first subframe determining means 501 for determining a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in each uplink subframe based on an ABS pattern of the own station;
PHICH information feedback means 502 that feeds back PHICH information corresponding to the uplink data in the determined downlink subframe after receiving uplink data from the UE.

  Here, the first subframe determination unit 501 includes a first determination module 5011 and a first search module 5012.

  Here, the first determining module 5011 determines whether or not the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS based on the ABS pattern of the local station. First search module 5012 determines frame i + 4 as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in uplink subframe i, and in the case of ABS, searches for an appropriate downlink subframe. Trigger.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報のフィードバック用下りサブフレームとして決定する。 The first search module 5012 receives a condition that is closest to the downlink subframe i + 4 after the downlink subframe i + 4.

A downlink subframe satisfying the above condition is searched and determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i.

は切り上げ演算を表す。 As described above, the above U represents the total number of uplink sub-frames corresponding to one ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is the one Indicates how many pieces of PHICH information have been fed back in the downlink subframe, and an operator

Represents a round-up operation.

  The base station may further include notification means for notifying the UE of a method for determining a PHICH information reception downlink subframe by RRC signaling, MAC CE, and O & M signaling.

As shown in FIG. 6, the internal configuration of the UE is
Second subframe determination means 601 for determining a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in each uplink subframe based on the ABS pattern transmitted from the base station;
PHICH information receiving means 602 for receiving PHICH information corresponding to the uplink data in the determined downlink subframe after transmitting the uplink data.

  Here, the second subframe determination unit 601 includes a second determination module 6011 and a second search module 6012.

  Here, the second determination module 6011 determines whether the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS based on the ABS pattern transmitted from the base station. The downlink subframe i + 4 is determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and in the case of the ABS, the second subframe i + 4 is searched for an appropriate downlink subframe. Trigger the search module 6012.

を満たす下りサブフレームを検索して、それを上りサブフレームｉで伝送される上りデータに対応するＰＨＩＣＨ情報の受信用下りサブフレームとして決定する。 The second search module 6012 determines that the condition closest to the downlink subframe i + 4 after the downlink subframe i + 4

A downlink subframe satisfying the above is searched, and it is determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i.

は切り上げ演算を表す。 As described above, the above U represents the total number of uplink sub-frames corresponding to one ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is the one Indicates how many pieces of PHICH information have been fed back in the downlink subframe, and an operator

Represents a round-up operation.

  The UE further includes receiving means for receiving a method for determining a PHICH information receiving downlink subframe transmitted from the base station by RRC signaling, MAC CE, and O & M signaling.

  According to the method and apparatus according to the embodiment of the present invention, the base station and the UE have the problem of how to determine the position of the downlink subframe for feedback or reception of PHICH information in the case of cross subframe scheduling. Can be solved. Further, in the above embodiment, the base station and the UE can determine the feedback sub-frame for feedback or reception of PHICH information corresponding to each uplink sub-frame in one ABS pattern, and the PHICH of the entire system It can be assured that the information (downlink ACK / NACK information) is evenly distributed over all available downlink subframes without concentrating on a large number of downlink subframes. Thereby, the occurrence of the situation of PHICH information blocking can be effectively avoided.

  The above are only preferred embodiments of the present invention and do not limit the protection scope of the present invention. Various modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present invention should all be included in the protection scope of the present invention.

501 First subframe determination means 5011 First determination module 5012 First search module 502 PHICH information feedback means 601 Second subframe determination means 6011 Second determination module 6012 Second search module 602 PHICH information reception means

Claims (16)

A method of transmitting physical hybrid automatic repeat request indication channel (PHICH) information, comprising:
The base station determines a downlink subframe for feedback of PHICH information corresponding to the uplink data transmitted in each uplink subframe, based on the all-most blank subframe (ABS) pattern of the local station,
When uplink data from a user terminal (UE) is received, PHICH information corresponding to the uplink data is fed back in the determined downlink subframe.
A method comprising: Based on the ABS pattern of the local station, determining a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in each uplink subframe is:
Whether or not the downlink subframe corresponding to each uplink subframe is usable is determined based on the ABS pattern of the local station, and if it is usable, the corresponding downlink subframe is transmitted in the uplink subframe. If it is unusable as a downlink subframe for feedback of PHICH information corresponding to the uplink data to be used, the available downlink subframe nearest to the downlink subframe is searched based on its own ABS pattern. Then, it is set as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe.
The method of claim 1 comprising: When determining whether or not the downlink subframe corresponding to each uplink subframe is usable, determining whether or not the downlink subframe corresponding to each uplink subframe is an ABS, respectively, , Becomes unusable and becomes unusable if not ABS,
Based on the ABS pattern of the local station, a usable downlink subframe closest to the downlink subframe is searched, and a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe The condition is that it is closest to the downlink subframe i + 4 after the downlink subframe i + 4 corresponding to the uplink subframe i.

And searching for a downlink subframe satisfying the following, and determining it as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in uplink subframe i, where U is one ABS pattern represents the total number of uplink subframes corresponding to, or D represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d is any number of PHICH information in one downlink sub-frame is fed back Represents the operator

Represents the round-up operation,
The method of claim 2. Based on the ABS pattern of the local station, determining a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in each uplink subframe is:
Step 1011 for setting the uplink subframe number i to be equal to 1,
Based on the ABS pattern of the local station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to Step 1013. If the downlink subframe i + 4 is not an ABS, Step 1014 is performed. Step 1012 to proceed to,
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above condition is searched and determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i, and then the process proceeds to step 1015, where U is 1 one of the total number of the uplink sub-frame corresponding to the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is what one PHICH information in one downlink sub-frame Represents feedback, operator

Is a step 1013 representing a round-up operation;
Step 1014 which proceeds to Step 1015 after determining the downlink subframe i + 4 as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 1012, and when i is equal to the total number U of uplink subframes corresponding to one ABS pattern, Step 1015 ending the process;
The method of claim 1 comprising: The base station notifies the UE of how to determine the downlink subframe for receiving PHICH information through radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling.
The method of claim 1 further comprising: A method of transmitting physical hybrid automatic repeat request indication channel (PHICH) information, comprising:
A user terminal (UE) determines a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in each uplink subframe based on an all-most blank subframe (ABS) pattern transmitted from the base station. ,
After transmitting the uplink data, the PHICH information corresponding to the uplink data is received in the determined downlink subframe.
A method comprising: Based on the ABS pattern transmitted from the base station, determining the downlink subframe for receiving PHICH information corresponding to the uplink data transmitted in each uplink subframe,
Based on the ABS pattern transmitted from the base station, whether or not the downlink subframe corresponding to each uplink subframe is usable is determined, and if it is usable, the corresponding downlink subframe is determined as the uplink subframe. If it is determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in a frame and cannot be used, it can be used closest to the downlink subframe based on the ABS pattern transmitted from the base station Search for a downlink subframe and use it as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe.
The method of claim 6 comprising: When determining whether or not the downlink subframe corresponding to each uplink subframe is usable, determining whether or not the downlink subframe corresponding to each uplink subframe is an ABS, respectively, , Becomes unusable and becomes unusable if not ABS,
Based on the ABS pattern transmitted from the base station, the available downlink subframe closest to the downlink subframe is searched, and the PHICH information receiving downlink corresponding to the uplink data transmitted in the uplink subframe is received. Subframe is a condition that corresponds to uplink subframe i and is closest to downlink subframe i + 4 after downlink subframe i + 4.

And searching for a downlink subframe satisfying the following, and determining it as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in uplink subframe i, where U is one ABS pattern represents the total number of uplink subframes corresponding to, or D represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d is any number of PHICH information in one downlink sub-frame is fed back Represents the operator

Represents the round-up operation,
The method of claim 7. Based on the ABS pattern transmitted from the base station, determining the downlink subframe for receiving PHICH information corresponding to the uplink data transmitted in each uplink subframe,
Step 3011 for setting the number i of the uplink subframe to be equal to 1,
Based on the ABS pattern transmitted from the base station, it is determined whether or not the downlink subframe i + 4 is an ABS. If the downlink subframe i + 4 is an ABS, the process proceeds to step 3013, and the downlink subframe i + 4 is not an ABS. , Step 3012 proceeding to step 3014;
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above is searched and determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and then the process proceeds to step 3015, where U is 1 one of the total number of the uplink sub-frame corresponding to the ABS pattern, D is represents the number of the downlink subframes that are not set with ABS in one ABS pattern, N _d is what one PHICH information in one downlink sub-frame Represents feedback, operator

Is a step 3013 representing a round-up operation;
Step 3014 which proceeds to Step 3015 after determining the downlink subframe i + 4 as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i;
When i is smaller than the total number U of uplink subframes corresponding to one ABS pattern, i is set to i + 1, and the process returns to step 3012. When i is equal to the total number U of uplink subframes corresponding to one ABS pattern, And ending the process 3015. The UE receives a method for determining a downlink subframe for receiving PHICH information transmitted from the base station through radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling. To
The method of claim 6 further comprising: A base station,
First, a downlink subframe for feedback of physical hybrid automatic repeat request indication channel (PHICH) information corresponding to uplink data transmitted in each uplink subframe is determined based on the own most blank subframe (ABS) pattern. 1 subframe determining means;
PHICH information feedback means for feeding back PHICH information corresponding to the uplink data in the determined downlink subframe after receiving the uplink data from the user terminal (UE);
A base station comprising: The first subframe determining means includes
Based on the ABS pattern of the local station, it is determined whether or not the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS. If the downlink subframe i + 4 is not an ABS, the downlink subframe i + 4 is transmitted in the uplink subframe i. A first determination module that triggers the first search module so as to search for an appropriate downlink subframe in the case of being an ABS, as a downlink subframe for feedback of PHICH information corresponding to uplink data
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above is searched and determined as a downlink subframe for feedback of PHICH information corresponding to uplink data transmitted in the uplink subframe i, and U is an uplink subframe corresponding to one ABS pattern. represents the total number of, D is represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d represents how many PHICH information in one downlink sub-frame is fed back, the operator

Is a first search module representing a round-up operation;
The base station according to claim 11, comprising:   Further comprising notification means for notifying the UE of a method for determining a PHICH information reception downlink subframe by radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation and maintenance (O & M) signaling. Item 12. The base station according to Item 11. A user terminal (UE),
Based on an all-blank blank subframe (ABS) pattern transmitted from the base station, a downlink subframe for receiving physical hybrid automatic repeat request indication channel (PHICH) information corresponding to uplink data transmitted in each uplink subframe is obtained. Second subframe determining means for determining;
PHICH information receiving means for receiving PHICH information corresponding to the uplink data in the determined downlink subframe after transmitting the uplink data;
UE characterized by including. The second subframe determining means includes
Based on the ABS pattern transmitted from the base station, it is determined whether or not the downlink subframe i + 4 corresponding to each uplink subframe i is an ABS. If the downlink subframe i + 4 is not an ABS, the downlink subframe i + 4 is determined as the uplink subframe i. A second determination module that triggers the second search module to search for an appropriate downlink subframe in the case of being an ABS, as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in
Condition that is closest to downlink subframe i + 4 after downlink subframe i + 4

A downlink subframe satisfying the above condition is searched and determined as a downlink subframe for receiving PHICH information corresponding to uplink data transmitted in the uplink subframe i, and U is an uplink subframe corresponding to one ABS pattern. represents the total number of, D is represents the number of downlink subframes that are not set with ABS in one ABS pattern, N _d represents how many PHICH information in one downlink sub-frame is fed back, the operator

Is a second search module representing a round-up operation;
The UE of claim 14 comprising:   Receiving means for receiving a method of determining a downlink subframe for receiving PHICH information transmitted from a base station by radio resource control (RRC) signaling, medium access control (MAC) control element (CE), and operation / maintenance (O & M) signaling The UE of claim 14 further comprising:

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