WO2011134353A1

WO2011134353A1 - Method and apparatus for resources mapping of physical hybrid arq indicator channel

Info

Publication number: WO2011134353A1
Application number: PCT/CN2011/072856
Authority: WO
Inventors: 戴博; 曾萍; 吴欣; 左志松; 郁光辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-30
Filing date: 2011-04-15
Publication date: 2011-11-03
Also published as: CN101848544B; CN101848544A

Abstract

A method and apparatus for resources mapping of Physical Hybrid ARQ Indicator Channel (PHICH) are provided in the present invention. The method and apparatus are used in Uplink Single-User Multiple Input Multiple Output (UL SU-MIMO) transmission scene. The method includes: a Base Station (BS) determining dynamic cyclic shift parameters of Demodulation Reference Signal (DMRS) according to a codeword stream index and/or a dynamic cyclic shift amount of the DMRS in Downlink Control Information (DCI) for uplink scheduling and/or layer index; the BS realizing resources mapping of the PHICH according to the determined dynamic cyclic shift parameters. With the subject-matter of the present invention, the resources mapping of the PHICH in MIMO scene could be effectively realized.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a resource mapping method and apparatus for a Physical Hybrid ARQ indicator channel (PHICH) in an uplink single-user multi-antenna transmission scenario. BACKGROUND The Long Term Evolution (LTE) system is an important plan of the third generation partner organization. When the LTE system uses the Normal Cyclic Prefix, one slot contains 7 lengths of uplink/downlink symbols. When the LTE system uses the extended Cyclic Prefix, one slot contains 6 lengths. / Downstream symbol. 1 is a schematic diagram of a physical resource block of an LTE system with a bandwidth of 5 MHz according to the related art. As shown in FIG. 1, a resource element (RE element) is one subcarrier in one OFDM symbol, and one downlink resource is used. A Resource Block (abbreviated as RB) is composed of 12 consecutive subcarriers and 7 consecutive OFDM symbols (6 when the cyclic prefix is extended). A resource block is 180 kHz in the frequency domain, and is a time slot of a general time slot in the time domain. When resource allocation is performed, resource blocks are used as a basic unit for allocation. In the uplink subframe, a Physical Uplink Control Channel (PUCCH) is located on two sidebands of the entire frequency band, and is used to transmit a Physical Uplink Shared Channel (PUSCH). Used to carry upstream data. The following physical channels are defined in the LTE system: Physical broadcast channel (PBCH for short): The information carried by the channel includes the frame number of the system, the downlink bandwidth of the system, the period of the physical hybrid retransmission channel, and the use. The parameter N _g e {1/6, 1/2, 1, 2} of determining the number of physical hybrid ARQ indicator channel (PHICH) channel groups. A physical downlink control channel (PDCCH) is used to carry uplink and downlink scheduling information, and uplink power control information. The Downlink Control Information (DCI) format (format) carried by the physical downlink control channel is divided into the following types: DCI format 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3 3A, etc., where format 0 is used to indicate the scheduling of the physical uplink shared channel (PUSCH); DCI format 1 , 1A, IB , 1C, ID is used for the physical downlink shared channel of the single transport block (Physical Downlink Shared Channel (PDSCH) is a different transmission mode; DCI format 2, 2A is used for different transmission modes of space division multiplexing; DCI format 3, 3A is used for physical uplink control channel (PUCCH) And transmission of power control commands of the PUSCH. Physical uplink shared channel: Used to carry uplink transmission data. The channel-related resource allocation, modulation and coding scheme, demodulation reference signal (DMRS), cyclic shift (referred to as CS), and other control information are used by the uplink grant (UL grant) with DCI format. 0 setting. Physical Hybrid ARQ Indicator Channel (PHICH): ACK/NACK feedback information used to carry uplink transmission data. The number and duration of the PHICH channel group are determined by the system message in the PBCH of the downlink carrier in which it is located. The time-frequency position of the PHICH is determined by the number of PHICH channel groups, the duration, the antenna configuration of the cell PBCH, the cell ID, and the PHICH. The group number and the sequence index within the group are determined. For frame structure 1 (FDD frame structure), the number of PHICH groups N _p ^g _{H is} determined by the following formula ( a ): Regular cyclic prefix case

A Tgroup

1 ^v PHICH formula (a)

Extended cyclic prefix case

N _g e {1/6, 1/2, 1, 2} is determined by the system message in the PBCH of the downlink carrier (Downlink carrier, DL carrier for short), and the PHICH group number is from 0 to N _p ^g _H - The number of 1 , where N^ is the bandwidth of the downlink carrier where the PHICH is located. For frame structure 2 (TDD frame structure), the number of PHICH groups is m, . - Ν^ , where ' is determined by Table 1 below. Table 1

Up and down subframe number i

Subframe

0 1 2 3 4 5 6 7 8 9

Configuration

0 2 1 - - - 2 1 - - -

1 0 1 - - 1 0 1 - - 1

2 0 0 - 1 0 0 0 - 1 0

3 1 0 - - - 0 0 0 1 1

4 0 0 - - 0 0 0 0 1 1

5 0 0 - 0 0 0 0 0 1 0

6 1 1 - _ _ 1 1 _ _ 1

PHICH resource by sequence pair

Is the index of the orthogonal sequence in the group, determined by the following resource mapping formula (b): group ― τ lowest index

Π n _nMRS )modN" + IW group

PHICH ―, 丄PRB RA + PHICH ⁱ PHICH

n seq ― lowest index I PHICH ( b ) PHICH ― I PRB RA ¹

+ "丽" mod 2N S,F where, " s is the demodulation reference signal defined in DCI format 0 (Demodulation

Reference Signal, referred to as DMRS) dynamic cyclic shift parameter, which can be determined according to the value of Table 2; Table 2

The configuration of the parameter causes different cyclic shifts among the MU-MIMO users in the cell, so that the intra-cell MU-MIMO users are orthogonal, and the intra-cell interference is suppressed. The UE determines the cyclic shift amount of the demodulation reference signal according to the dynamic cyclic shift parameter according to the correspondence relationship of Table 3. table 3

d Spreading factor of PHICH modulation, for regular CP, N^ ^ICH = 4, extended CP,

C = 2 .

J'o^t nde is the lowest index of the physical resource block ( _Ph y _sical Resource Block, abbreviated as PRB) allocated by the uplink resource;

TDD UL/DL configuration 0 PUSCH is transmitted in subframe 4 or 9

I PHICH

Other

LTE Release-8 uplinks only allow single antenna transmission. In formula (b), ^ for the UE, only one in DCI format 0.

Sequence design of PUSCH DMRS, time-frequency extension of DMRS sequence: r _v PUSCH L \m _Λ RS丄, J _v (a)

-M _sc +nj = r _M [n

m = 0 ,1

RS

n = 0 M

a =2 n _cs /l2 ^DMRS + ^W DMRS + "PRS Mfmod 12 m = n _s mod 2 _: = 0,1 corresponds to the first and second time slots of each subframe respectively. There are 12 cyclic shift values, and the PUSCH DMRS bandwidth is the same as the PUSCH bandwidth. .

The cyclic shift n _{cs of the} DMRS sequence is determined by three parameters, as follows:

: Determined by high-level parameters (3 bits), semi-static configuration, so that different cells have different cyclic shifts, making inter-cell MU-MIMO users orthogonal, and suppressing inter-cell interference. Ξξ^: Provided by the nearest DCI format 0 (3 bits) (refer to Table 2), dynamic configuration, which makes the MU-MIMO users in the cell have different cyclic shifts, making the intra-cell MU-MIMO users orthogonal and suppressing The area is full of disturbances. It can be called a dynamic cyclic shift parameter. n _PRS {n _s ) is determined by the cell identity number A (identity, referred to as ID) and the variable based on the time slot is:

l ID PUSCH

Init —

30 C ^{H is} defined as: / _s ^SCH

+ A _ss ) mod 3 ₀ ss ^UCCH = ^ID ¹ mod30 , where A _ss G {0,1,..., 29 } is configured through the upper layer. The Long-Term Evolution Advanced (LTE-A) is an evolved version of LTE Release-8. Backward compatibility is required in the requirements of advanced international wireless communication systems proposed by the International Telecommunication Union Radiocommunication Group. The requirements for backward compatibility between LTE-Advanced and LTE Release-8 mean that: LTE Release-8 terminals can work in LTE-Advanced networks; LTE-Advanced terminals can work in LTE Release-8 networks. In addition, LTE-Advanced should be able to be configured in different sizes, including wider frequencies than LTE Release-8. Spectrum configuration (eg, 100 MHz continuous spectrum resources) works to achieve higher performance and target peak rates. Considering compatibility with LTE Release-8, for bandwidths greater than 20 MHz, the method of carrier aggregation is used, that is, two or more component carriers are aggregated to support downlinks greater than 20 MHz. Transmission bandwidth. A terminal in an LTE-A system can simultaneously transmit one or more component carriers according to its capability, and the uplink can use a single-user multi-antenna transmission technology, including Transmit Diversity (TxD for short) and spatial multiplexing (Multiple Input). Multiple Output (referred to as MIMO) „ Each component carrier supports up to 2 codeword streams for simultaneous transmission. The mapping rules of Acknowledgement/Negative Acknowledgement (ACK/NACK for short) are also used. Standardization is required. The codeword to layer mapping rule of the uplink codeword stream is the same as the downlink layer mapping rule, and FIG. 2 is a schematic diagram of layer mapping of the LTE-A uplink codeword stream according to the related art. In the MIMO scenario, When DMRS is introduced, an Orthogonal Cover Code (OCC) is used to improve the orthogonality between terminals by using (1, 1) or (1, -1) on the two RS symbols of the slot. 3 is a schematic diagram of an uplink 4 antenna layer 4 transmission and using an OCC code in a MIMO scenario. In the related art, uplink scheduling DCI format 0 does not support uplink multi-antenna transmission, in LTE- In the uplink multi-antenna transmission scenario, the uplink scheduling DCI needs to be newly added, and it is temporarily recorded as DCI format X. If DCI format X is used, the appropriate DMRS cyclic shift related parameters are configured for each layer of the UE, and each cyclic shift is performed. If the bit size is 3 bits, the signaling overhead is relatively large. For example, for 4-layer transmission, each layer is configured with a 3-bit DMRS cyclic shift parameter, which requires 12-bit signaling. And in the MIMO scenario, DMRS may be introduced. Or Orthogonal Cover Code (OCC), that is, using (1, 1) or (1, -1) on the two RS symbols of the slot to improve the orthogonality between the terminals. In the scenario, the uplink 4 antenna layer 4 transmits and uses the OCC code. If the terminal uses the dynamic cyclic shift amount of the same bit field in the MU-MIMO scenario, the PHICH mapping needs to be redefined. Some single antenna resource mapping methods are not applicable to multi-antenna transmission modes with multi-layer resource mapping. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that the single antenna resource mapping method in the related art is not applicable to the multi-antenna transmission mode with multi-layer resource mapping. To this end, the main object of the present invention is to provide an improved PHICH resource mapping method. And devices to solve at least one of the above problems. According to an aspect of the present invention, a PHICH resource mapping method is provided. The PHICH resource mapping method according to the present invention includes: dynamic cyclic shift amount and/or layer index determination of a demodulation reference signal (DMRS) in a base station codeword stream I and/or uplink scheduling downlink control information (DCI) The dynamic cyclic shift parameter of the DMRS; the base station is determined by the dynamic cyclic shift parameter to implement the resource mapping of the PHICH. The determining the dynamic cyclic shift parameter of the DMRS includes: directly using the value of the DMRS dynamic cyclic shift i or in the uplink scheduling DCI as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. The determining the dynamic cyclic shift parameter of the DMRS includes: selecting the last or highest layer index of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer index as the first codeword stream corresponding to The dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula. The foregoing determining the dynamic cyclic shift parameter of the DMRS includes: selecting the last or highest layer of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer in the predetermined dynamic cyclic shift parameter and the actual dynamic The corresponding dynamic cyclic shift parameter in the correspondence relationship of the cyclic shift amount is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. When the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS includes: using the sum of the dynamic cyclic shift parameter of the first codeword stream and the offset as the second codeword stream. The dynamic cyclic shift parameter of the DMRS in the corresponding PHICH mapping formula. Alternatively, the dynamic cyclic shift parameter of the first codeword stream and the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the modulo 8 of the offset as the second codeword stream. When the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS includes: lowering or highest layer of the layer where the second codeword stream is located, or actual dynamic cyclic shift of the DMRS corresponding to the fixed layer The bit amount is used as a dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. When the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS includes: lowering or highest layer of the layer where the second codeword stream is located, or actual dynamic cyclic shift of the DMRS corresponding to the fixed layer The dynamic cyclic shift parameter corresponding to the bit quantity in the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. When the uplink transmission data further includes the second codeword stream, the second codeword stream and the first codeword stream are mapped into the same PHICH group, and the DMRS dynamic cyclic shift in the orthogonal index formula corresponding to the second codeword stream PHICH The bit parameter is the sum of the value and the offset in the dynamic cyclic shift domain of the DMRS, or the DMRS dynamic cyclic shift parameter in the orthogonal index formula corresponding to the second codeword stream PHICH is the value in the dynamic cyclic shift domain of the DMRS. The value after the modulo 8 with the sum of the offsets. The above offset is one of the following: a predefined value, a base station configuration value, an index of the lowest layer or the highest layer corresponding to the second codeword stream, and a quotient of 12 and the total number of layers L. The determining the dynamic cyclic shift parameter of the DMRS includes: the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to each codeword stream is the index of the highest layer or the highest layer of the layer where the codeword stream is located. The determining the dynamic cyclic shift parameter of the DMRS includes: the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is the actual dynamic cyclic shift amount of the fixed layer DMRS. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is an actual dynamic cyclic shift amount of the fixed layer DMRS, including: the actual dynamic cyclic shift amount of the first layer is used as the first codeword stream. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula uses the actual dynamic cyclic shift amount of the second layer as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the second codeword stream. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is a dynamic cyclic shift amount of the DMRS of the fixed layer, including: shifting the actual dynamic cyclic shift amount of the first layer in a predetermined dynamic cyclic shift The corresponding dynamic cyclic shift parameter in the correspondence between the parameter and the actual dynamic cyclic shift amount is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the first codeword stream, and the actual dynamic cyclic shift amount of the second layer is The corresponding dynamic cyclic shift amount signaling value in the correspondence relationship is used as a dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the second codeword stream. The corresponding relationship between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount is: The dynamic cyclic shift parameter 0, 1 , 2, 3, 4, 5, 6, 7 corresponds to the actual dynamic cyclic shift amount is 0. , 6, 3, 4, 2, 8, 10, 9. According to another aspect of the present invention, a PHICH resource mapping apparatus is provided. The PHICH resource mapping apparatus of the present invention includes: a determining module configured to set a dynamic cyclic shift amount and/or a layer index of a demodulation reference signal (DMRS) in a codeword stream index and/or uplink scheduling downlink control information (DCI) Determining a dynamic cyclic shift parameter of the DMRS; a resource mapping module configured to implement resource mapping of the PHICH according to the determined dynamic cyclic shift parameter. Through the invention, the DMRS related parameters in the mapping formula of the physical hybrid retransmission channel are redefined in the MIMO scenario, and the single antenna resource mapping manner in the related art is not applicable to the multi-antenna transmission mode with multi-layer mapping. The problem can further effectively map the PHICH resources in the MIMO scenario. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a physical resource block of an LTE system with a bandwidth of 5 MHz according to the related art; FIG. 2 is a schematic diagram of layer mapping of an LTE-A uplink codeword stream according to the related art; FIG. 4 is a flowchart of a resource mapping method of a PHICH according to an embodiment of the present invention; FIG. 5 is a PHICH of an embodiment of the present invention; A block diagram of the structure of the resource mapping device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. 4 is a flow chart of a PHICH resource mapping method according to an embodiment of the present invention. As shown in FIG. 4, the resource mapping method includes the following processing: Step S402: The base station determines the DMRS according to the dynamic cyclic shift amount and/or the layer index of the demodulation reference signal DMRS in the codeword stream index and/or the uplink scheduling DCI. Dynamic cyclic shift parameter; Step S404: The base station is determined by the dynamic cyclic shift parameter to implement resource mapping of the physical hybrid retransmission indication channel PHICH. In the related art, the uplink scheduling DCI format 0 does not support uplink multi-antenna transmission. In the LTE-A uplink multi-antenna transmission scenario, the uplink scheduling DCI needs to be newly added. If the new format is used, the layer is used for the UE. The bit configuration of the appropriate DMRS cyclic shift related parameters, the signaling overhead is relatively large, so a limited signaling overhead is used, such as a 3-bit DMRS cyclic shift domain indicating a set of DMRS actual cyclic shifts of multiple layers. . And in the MIMO scenario, a DMRS time domain orthogonal code may be introduced. Therefore, the single antenna PHICH resource mapping manner is not applicable to a multi-antenna transmission mode having multiple layers. With the above technical solution, the mapping of PHICH resources in the UL SU-MIMO scenario can be effectively implemented. In a preferred implementation process, the base station side feeds back ACK/NACK information of the uplink data, and carries the ACK/NACK information on the PHICH. In the UL SU-MIMO scenario, the dynamic cyclic shift parameter of the DMRS in the PHICH mapping is dynamically according to the DMRS indicated in the uplink scheduling DCI. At least one of the cyclic shift amount and the codeword stream index is determined. Various preferred aspects of determining dynamic cyclic shift parameters in step 4 S402 are separately described below. Preferably, when the uplink transmission data includes the first codeword stream, the foregoing step S402 may further include: the value in the DMRS dynamic cyclic shift domain in the uplink scheduling DCI is directly used as the PHICH mapping formula corresponding to the first codeword stream. The dynamic cyclic shift parameter of the DMRS is n _nMR . The above preferred implementation process will be described below in conjunction with the first embodiment. Embodiment 1 If the uplink transmission is 4 layers and the two codeword streams are transmitted, when the DMRS dynamic cyclic shift amount signaling in the uplink scheduling DCI is 000, the actual dynamic cyclic shift amount of each layer corresponding to the DMRS is 0, 3,

6, 9; then the dynamic cyclic shift parameter " _σΜ ^ of the DMRS in the PHICH mapping corresponding to the first codeword stream is 0. Preferably, when the uplink transmission data includes the first codeword stream, step S402 may include the following processes: the highest or highest layer of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer. ² as the PHICH mapping formula corresponding to the first codeword stream

Dynamic Cyclic Shift Parameters of DMRS The preferred implementation described above is described below in connection with Embodiment 2. Embodiment 2, the uplink transmission is 4 layers, two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when uplink scheduling DCI When the medium DMRS dynamic cyclic shift amount signaling is 000, the actual dynamic cyclic shift amount of each layer corresponding to the DMRS is 0, 3, 6, 9; the dynamic cyclic shift of the DMRS in the PHICH mapping corresponding to the first codeword stream The bit parameter " ^DMRS is 0 or 3; (0 is the actual dynamic cyclic shift amount of the DMRS of the first layer of the first codeword stream, and 3 is the actual dynamic cyclic shift amount of the DMRS of the highest layer of the first codeword stream). Preferably, when the uplink transmission data includes the first codeword stream, step S402 may include the following: a lowest or highest layer index of a layer where the first codeword stream is located, or an actual dynamic cyclic shift of the DMRS corresponding to the fixed layer index. The dynamic cyclic shift amount signaling value corresponding to the corresponding relationship between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount (ie, LTE original correspondence table 3)

(According to the signaling in the corresponding "(^) in Table 2 as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. The following preferred implementation process is described in conjunction with Embodiment 3 - Embodiment 3: If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when the uplink scheduling DCI is in the DMRS When the dynamic cyclic shift amount signaling is 000, layer 0, layer 1, layer 2, layer 3 correspond to the actual dynamic cyclic shift amount of DMRS in order of 0, 3, 6, 9; PHICH corresponding to the first codeword stream The dynamic cyclic shift parameter of the DMRS in the mapping " _σΜ ^ is 0 or 2 (0 is the actual dynamic cyclic shift amount of the lowest layer of the first codeword stream "^^ in the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift The corresponding dynamic cyclic shift amount signaling value in the correspondence of the bit quantity (ie, the LTE original correspondence table 3), 2 is the actual dynamic cyclic shift amount of the highest layer of the first codeword stream corresponding to the LTE original correspondence table 3 Dynamic cyclic shift amount signaling value). It should be noted that, if the uplink transmission data includes only one codeword stream, the PHCH corresponding to the codeword stream may be determined by determining the dynamic cyclic shift parameter in the PHICH resource mapping corresponding to the first codeword stream. Dynamic cyclic shift parameters in the resource map. Preferably, when the uplink transmission data includes the second codeword stream, step S402 includes the following processing: The dynamic cyclic shift parameter DM« of the DMRS in the PHICH mapping formula of the layer where the second codeword stream is located is equal to the first codeword The sum of the parameters of the stream, ^ and the offset, or the value of the dynamic cyclic shift parameter of the first codeword stream and the sum of the offset and the modulo 8. Wherein, the offset is a predefined value, or the offset is a base station configuration value, or the offset is an index of the lowest layer or the highest layer corresponding to the second codeword stream, or the offset is 12 and The quotient of the total number of layers L is Offset = \1IL and L is 2, 3, 4). The above preferred implementation process will be described below in conjunction with Embodiment 4. Embodiment 4 If the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the first codeword stream is 0, the following describes the four scenarios. scene one When the offset (Offset) is a predetermined value, that is, the fixed value is 2; then the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is 0+2=2; When the shift is the base station configuration value, the base station configures the offset by the signaling to be 4; then the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is 0+4=4; When the quantity is the index of the lowest layer or the highest layer corresponding to the second codeword stream, if the uplink transmission is 4 layers, the two codeword streams are transmitted, and the first codeword stream corresponds to layer 0 and layer 1, and the second codeword The stream corresponds to layer 2 and layer 3; the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is 0+2 = 2 or 0+3 = 3 (2 is the second codeword stream Layer index, 3 is the highest layer of the second codeword stream). Scene 4 is when the offset is 12 and the total number of layers L, where the total number of layers L can be 2, 3, 4. If the uplink transmission is 4 layers, the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is 0+12/4=3. Preferably, when the uplink transmission data further includes the second codeword stream, the determining, by the base station, the dynamic cyclic shift parameter may include the following: a highest or highest layer of the layer where the second codeword stream is located, or a DMRS corresponding to the fixed layer The actual dynamic cyclic shift amount "^^ is the dynamic cyclic shift parameter " _σΜ ^ of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. The above preferred implementation process will be described below in conjunction with Embodiment 5. Embodiment 5: If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when the uplink scheduling DCI is in the DMRS dynamic loop When the shift amount signaling is 000, the actual dynamic cyclic shift amount of each layer corresponding to the DMRS is 0, 3, 6, 9; then the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is " _DM " ^ is 6 or 9; (6 is the actual dynamic cyclic shift amount of the highest layer of the second codeword stream, 9 is the actual dynamic cyclic shift amount of the highest layer of the second codeword stream); preferably, the uplink transmission data further includes the second In the case of the codeword stream, the above step 4 S402 may further include the following processing: the highest or highest layer of the layer where the second codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer in the LTE original correspondence table 3 The corresponding dynamic cyclic shift amount signaling value (corresponding to the signal in Table 2, ^) is the dynamic cyclic shift parameter " _σΜ ^ of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. The above preferred implementation process will be described below in connection with Embodiment 6. Embodiment 6: If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when the uplink scheduling DCI is in the DMRS dynamic loop When the shift amount signaling is 000, layer 0, layer 1, layer 2, layer 3 sequentially correspond to the actual dynamic cyclic shift amount of the DMRS is 0, 3, 6, 9; then the PHICH mapping corresponding to the second codeword stream The dynamic cyclic shift parameter n _{DMRS of the DMRS} is 1 or 7; (1 is the actual dynamic cyclic shift amount of the lowest layer of the second codeword stream 6 corresponding dynamic cyclic shift amount signaling value in the LTE original correspondence table 3 7 is the actual dynamic cyclic shift amount 9 of the highest layer of the second codeword stream and the corresponding dynamic cyclic shift amount signaling value in the LTE original correspondence table 3. It should be noted that the method corresponding to the first codeword stream and the method corresponding to the second codeword stream may be arbitrarily combined to form a PHICH mapping method in two codeword stream scenarios. It should be noted that the mapping method corresponding to the first codeword stream is also applicable to the scenario of the multi-antenna field single-codeword stream. Preferably, the foregoing step S402 may further include the following process: The base station determines a last or highest layer index corresponding to each codeword stream as a dynamic cyclic shift parameter in the PHICH resource map corresponding to the codeword stream. The above preferred process is described below in connection with embodiment 7. Example 7 If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream corresponds to layer 0 and layer 1, and the second codeword stream corresponds to layer 2 and layer 3; then: the first codeword stream corresponds to the PHICH mapping The dynamic cyclic shift parameter of the DMRS is ^0 or 1; (0 is the lowest layer index of the first codeword stream, 1 is the highest layer index of the first codeword stream); then the PHICH mapping corresponding to the second codeword stream The dynamic cyclic shift parameter of the DMRS is ^2 or 3; (2 is the lowest layer index of the second codeword stream, and 3 is the highest layer index of the second codeword stream). Preferably, the foregoing step S402 may further include the following processing: when the uplink transmission data includes two codeword streams, the PHICH resources of the two codeword streams are mapped into the same PHICH resource group ^η , and the uplink scheduling in the ^nu & i formula The value in the dynamic cyclic shift domain of the DMRS in the DCI is directly used as the PHICH mapping formula corresponding to the first codeword stream.

The dynamic cyclic shift parameter ^{nDMRS of the DMRS} , the PHICH group formula of the second codeword stream is the same as the first codeword stream, and the second codeword stream PHICH orthogonal index" ^adds a bias to the parameter of the first codeword stream in the formula Shift CWOffset + CWOffset, or,

" s s = (n _DMRS + CWOffset) modS ), where the offset ( C ^^" ) is a predefined value, or the offset is the base station configuration value, or the offset is the second code word The index of the lowest layer or the highest layer corresponding to the stream, or the quotient of the offset 12 and the total number of layers L, L may be 2, 3, 4). The above preferred implementation process will be described below in conjunction with Embodiment 8. Embodiment 8 If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when the uplink scheduling DCI is in the DMRS dynamic loop When the shift amount signaling is 000, layer 0, layer 1, layer 2, and layer 3 sequentially correspond to the actual dynamic cyclic shift amount of the DMRS as 0, 3, 6, 9. The PHICH resource is indicated by the sequence number pair ( ; , n _CH , where is the PHICH group number, n; _CH is the orthogonal sequence number in the group. The PHICH resource mapping formula of the two codeword streams is as follows on the LTE basis:

_N S ^RO "P _ ) _mG d N ^gWUP + IN'

"PHICH ^PRB RA ^ ^T DMRS J ^{illl U 1 v} PHICH ^{T 1} PHICH ^{1 v} 1 PHICH

PHICH

n' cH = ( Ip ^nckx IN _P ⁸ Z ^P H + n + CWOffset) mod 2N SF

"PHICH ―

PHICH

n cH =

8) mod 2N where, for the transport block associated with the corresponding PUSCH transmission, is the cyclic shift amount of the DMRS field in the recently received DCI format (determined according to Table 2). If there is no PDCCH with DCI Format 0 for the same transport block, and one of the following is satisfied, "DA^ is set to _0. Case 1. If the initial PUSCH for the same transport block is semi-persistently scheduled. Case 2, if The initial PUSCH for the same transport block is scheduled by random access corresponding grants, where N ^CH is the spreading factor for PHICH modulation; the lowest PRB sequence number of the first time slot is transmitted for the corresponding PUSCH; NH is configured by the upper layer Number of PHICH groups;

I H can be determined by the following formula:

_ Jl TDD upstream/downlink configuration with PUSCH transmission in subframe 4 or 9 0 = 0 other

The value 000 in the DMRS dynamic cyclic shift domain in the uplink scheduling DCI is directly used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. ^DMRS , second The codeword stream is n _DMRS in the formula with the first codeword stream, in the n; _CH formula, ⁿ ms = ⁿ DMRs ⁺ Offset, or, " _DMRS = (" _DMW + O et) mod8. Preferably, the foregoing step S402 may further include the following process: the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is obtained according to the actual dynamic cyclic shift amount of the fixed layer DMRS. That is, the actual dynamic cyclic shift amount of the first layer) is used as the dynamic cyclic shift parameter n of the DMRS in the PHICH mapping formula of the first codeword stream, and the actual dynamic cyclic shift amount of the layer 1 (ie, the second layer) is taken as the first The dynamic cyclic shift parameter ⁿ DMR _S of the DMRS in the PHICH mapping formula of the two code word stream. Alternatively, wherein the actual dynamic cyclic shift amount of layer 0 corresponds to the actual dynamic cyclic shift parameter and the actual dynamic cyclic shift amount The dynamic cyclic shift amount signaling value in the relationship (ie, LTE original correspondence table 3) (corresponding according to the signaling in Table 2, ^) is the dynamic loop of the DMRS in the PHICH mapping formula of the first codeword stream. Shift parameter n, the actual dynamic cyclic shift of layer 1

«^^ The dynamic cyclic shift amount signaling value corresponding to the LTE original correspondence table 3 (according to the corresponding n _DMRS in Table 2 according to the signaling) as the dynamic loop of the DMRS in the PHICH mapping formula of the second codeword stream Shift parameter n _DMRS . The above preferred process is described below in connection with embodiment IX. Embodiment 9: If the uplink transmission is 4 layers, the two codeword streams are transmitted, the first codeword stream is mapped to layer 0 and layer 1, and the second codeword stream is mapped to layer 2 and layer 3; when the uplink scheduling DCI is in the DMRS dynamic loop When the shift amount signaling is 000, layer 0, layer 1, layer 2, and layer 3 sequentially correspond to the actual dynamic cyclic shift amount of the DMRS as 0, 3, 6, 9. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the first codeword stream "DMw is the actual dynamic cyclic shift amount of layer 0; the PHICH mapping corresponding to the second codeword stream

The dynamic cyclic shift parameter ^M ^ of the DMRS is the actual dynamic cyclic shift amount of layer 1; or the dynamic cyclic shift parameter of the DMRS in the PHICH map corresponding to the first codeword stream is the actual dynamic cyclic shift of layer 0. The dynamic cyclic shift amount signaling value corresponding to the value in Table 3 is 0; the dynamic cyclic shift parameter of DMRS in the PHICH mapping corresponding to the second codeword stream is " ^σΜ ^ is the actual dynamic cyclic shift amount of layer 1 at The corresponding dynamic cyclic shift amount signaling value 2 in Table 3. Figure 5 is a structural block diagram of a PHICH resource mapping apparatus according to an embodiment of the present invention; as shown in Figure 5, the resource mapping apparatus includes: a determining module 52 and processing Module 54. The determining module 52 is configured to determine a dynamic cyclic shift parameter of the DMRS according to a dynamic cyclic shift amount and/or a layer index of the demodulation reference signal DMRS in the codeword stream I and/or the uplink scheduling DCI; the resource mapping module 54. The resource mapping of the physical hybrid retransmission indication channel PHICH is implemented according to the determined dynamic cyclic shift parameter. The processing of the foregoing base station can effectively implement mapping of PHICH resources in the UL SU-MIMO scenario. Preferably, determining mold Block 52 is further configured to directly use the value in the DMRS dynamic cyclic shift domain in the uplink scheduling DCI as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. Correspondingly, the determining module 52 is further configured to set the lowest or highest index of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer as the first codeword stream. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula. The determining module can determine the actual dynamic cyclic shift amount of each layer of the DMRS according to the dynamic cyclic shift amount of the DMRS in the uplink grant information, and corresponding to the first codeword stream. The highest or highest layer, or the DMRS actual dynamic cyclic shift amount corresponding to the fixed layer, is used as the dynamic cyclic shift parameter ^dmrs of the DMRS in the PHICH map corresponding to the first codeword stream. Preferably, the determining module 52 is further configured to set the lowest or highest layer of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer in the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift The corresponding dynamic cyclic shift amount signaling value in the correspondence of the bit amount is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream. In a preferred implementation process, the determining module 52 is configured to determine, according to the dynamic cyclic shift amount of the DMRS in the uplink grant information, the actual dynamic cyclic shift amount of each layer of the DMRS; and the highest or highest layer corresponding to the first codeword stream. Or, the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer is queried according to the correspondence relationship of Table 3, and the dynamic cyclic shift parameter is obtained; and the dynamic cyclic shift parameter of the DMRS in the PHICH map corresponding to the first codeword stream is used. n _DMRS . Preferably, the determining module 52 is further configured to: when the uplink transmission data further includes the second codeword stream (ie, includes two codeword streams, a first codeword stream and a second codeword stream), the first one The sum of the dynamic cyclic shift parameter of the codeword stream and the offset is the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. In a preferred implementation, the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream is equal to the sum of the parameter r and the offset (Offset) of the first codeword stream.

( n l = n ^ + Offset ), where the offset ( Offset ) is a predefined value, for example, 1 , 2, 3 ,

4, or, the offset is the base station configuration value, or the offset is the index of the last layer or the highest layer corresponding to the second codeword stream, or the quotient of 12 and the total number of layers L. Preferably, the determining module 52 is further configured to use the lowest or highest layer index of the layer where the second codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer index as the second code. The dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the word stream. In a preferred implementation process, the determining module 52 may determine the actual dynamic cyclic shift amount of each layer of the DMRS according to the dynamic cyclic shift amount of the DMRS in the uplink scheduling DCI information, and correspond to the highest or highest layer corresponding to the second codeword stream. The DMRS actual dynamic cyclic shift amount is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to the second codeword stream. ^DMRS . Preferably, the determining module 52 is further configured to further include the second code in the uplink transmission data. When the word stream is used, the highest or highest layer of the layer in which the second codeword stream is located, or the DMRS corresponding to the fixed layer The dynamic cyclic shift amount signaling value corresponding to the actual dynamic cyclic shift amount in the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount is used as the PHICH mapping formula corresponding to the second codeword stream. Dynamic cyclic shift parameters of DMRS. In a preferred implementation process, the determining module 52 is configured to determine the actual dynamic cyclic shift amount of each layer of the DMRS according to the dynamic cyclic shift amount of the DMRS in the uplink scheduling DCI; and corresponding to the highest or highest layer corresponding to the second codeword stream. The actual dynamic cyclic shift amount of the DMRS is obtained according to the correspondence relationship of Table 3, and the dynamic cyclic shift parameter is obtained; the dynamic cyclic shift parameter n of the DMRS in the PHICH map corresponding to the second codeword stream is further determined by the module 52, It may also be configured to determine the highest or highest layer index corresponding to each codeword stream as the dynamic cyclic shift parameter in the PHICH resource map corresponding to the codeword stream. And, when the uplink transmission data includes the first codeword stream and the second codeword stream, and the PHICH resources corresponding to the two codeword streams are mapped in the same PHICH group, the determining module 52 may be in the PHICH formula. The value of the DMRS dynamic cyclic shift domain in the uplink scheduling DCI is directly used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream; the orthogonal index formula corresponding to the second codeword stream PHICH The DMRS dynamic cyclic shift parameter is the value of the DMRS dynamic cyclic shift i or the value of the sum of the offsets and the modulo 8. The working mode of the above-mentioned respective modules combined with each other can be referred to the embodiment. For example, the method for mapping PHICH resources in the UL SU-MIMO scenario is implemented by the foregoing embodiments provided by the present invention. Obviously, those skilled in the art should understand that The various modules or steps of the present invention described above may be implemented by a general purpose computing device, which may be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made in a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A physical hybrid retransmission indication channel PHICH resource mapping method, which is applied to an uplink single-user multi-antenna transmission UL SU-MIMO scenario, including:

Determining, by the base station, a dynamic cyclic shift parameter of the DMRS according to a dynamic cyclic shift amount and/or a layer index of the demodulation reference signal DMRS in the codeword streamer I and/or the uplink scheduling downlink control information DCI; The determined dynamic cyclic shift parameter implements resource mapping of the PHICH.

2. The method according to claim 1, wherein the determining a dynamic cyclic shift parameter of the DMRS comprises:

^! The value of the DMRS dynamic cyclic shift in the DCI is directly used as the dynamic cyclic shift parameter of the DMRS in the corresponding PHICH mapping formula of the first codeword.

3. The method according to claim 1, wherein the determining a dynamic cyclic shift parameter of the DMRS comprises:

The lowest or highest layer index of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer index as the dynamic cyclic shift of the DMRS in the PHICH mapping formula corresponding to the first codeword stream parameter.

4. The method according to claim 1, wherein the determining a dynamic cyclic shift parameter of the DMRS comprises:

The most 4th or highest layer of the layer where the first codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer corresponds to the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount. The dynamic cyclic shift parameter is used as a dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the first codeword stream.

The method according to any one of claims 2 to 4, wherein, when the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS comprises: The sum of the dynamic cyclic shift parameter of the codeword stream and the offset is the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream. Or, the dynamic cyclic shift parameter of the first codeword stream is followed by the sum of the offsets A dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream.

The method according to any one of claims 2 to 4, wherein, when the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS comprises: placing the second The highest or highest layer of the layer where the codeword stream is located, or the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer is used as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream.

The method according to any one of claims 2 to 4, wherein, when the uplink transmission data further includes the second codeword stream, the determining the dynamic cyclic shift parameter of the DMRS comprises: The highest or highest layer of the layer where the codeword stream is located, or the dynamic cyclic shift parameter corresponding to the actual dynamic cyclic shift amount of the DMRS corresponding to the fixed layer in the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount A dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula corresponding to the second codeword stream.

The method according to claim 2, wherein, when the uplink transmission data further includes the second codeword stream, the second codeword stream and the first codeword stream are mapped into the same PHICH group, The DMRS dynamic cyclic shift parameter in the orthogonal index formula corresponding to the PHCH of the two-codeword stream is the sum of the value of the DMRS dynamic cyclic shift i or the offset, or the orthogonal index formula corresponding to the PHCH of the second codeword stream The medium DMRS dynamic cyclic shift parameter is a value after the sum of the value of the DMRS dynamic cyclic shift domain and the offset.

The method according to claim 5 or 8, wherein the offset is one of: a predefined value, a base station configuration value, an index of a lowest layer or a highest layer corresponding to the second codeword stream. , 12 and the total number of layers L quotient.

10. The method according to claim 1, wherein the determining a dynamic cyclic shift parameter of the DMRS comprises: a dynamic cyclic shift parameter of a DMRS in a PHICH mapping formula corresponding to each codeword stream is a codeword stream The index of the lowest or highest layer of the layer.

The method according to claim 1, wherein the determining the dynamic cyclic shift parameter of the DMRS comprises: the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is the actual of the fixed layer DMRS Dynamic cyclic shift amount.

12. The method according to claim 11, wherein the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is an actual dynamic of the fixed layer DMRS. The ring shift amount includes: taking the actual dynamic cyclic shift amount of the first layer as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the first codeword stream, and taking the actual dynamic cyclic shift amount of the second layer as the first The dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the two codeword stream.

The method according to claim 11, wherein the dynamic cyclic shift parameter of the DMRS in the PHICH mapping corresponding to each codeword stream is a dynamic cyclic shift amount of the DMRS of the fixed layer, including: The dynamic cyclic shift parameter corresponding to the actual dynamic cyclic shift amount in the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount is used as the dynamic cyclic shift of the DMRS in the PHICH mapping formula of the first codeword stream. Bit parameter, the actual dynamic cyclic shift amount of the second layer, the corresponding dynamic cyclic shift amount signaling value in the corresponding relationship, as the dynamic cyclic shift parameter of the DMRS in the PHICH mapping formula of the second codeword stream .

The method of claim 4 or 7 or 13, wherein the correspondence between the predetermined dynamic cyclic shift parameter and the actual dynamic cyclic shift amount is: dynamic cyclic shift parameter 0, 1 , 2, 3 The actual dynamic cyclic shift amounts corresponding to 4, 5, 6, 7 are 0, 6, 3, 4, 2, 8, 10, 9.

15. A physical hybrid retransmission indication channel PHICH resource mapping apparatus, which is applied to an uplink single-user multi-antenna transmission UL SU-MIMO scenario, including:

a determining module, configured to determine a dynamic cyclic shift parameter of the DMRS according to a codeword stream index and/or an uplink cyclic control information DCI, a dynamic cyclic shift amount of the demodulation reference signal DMRS, and/or a layer index;

The resource mapping module is configured to implement the resource mapping of the PHICH according to the determined dynamic cyclic shift parameter.