CN110535582B - Transmission method and device of physical control channel, sending end equipment and storage medium - Google Patents
Transmission method and device of physical control channel, sending end equipment and storage medium Download PDFInfo
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- CN110535582B CN110535582B CN201810910194.7A CN201810910194A CN110535582B CN 110535582 B CN110535582 B CN 110535582B CN 201810910194 A CN201810910194 A CN 201810910194A CN 110535582 B CN110535582 B CN 110535582B
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The invention discloses a transmission method, a device, sending end equipment and a storage medium of a physical control channel, wherein the transmission method comprises the following steps: using a precoding matrix to perform precoding processing on a data sequence of a physical control channel; in the processing process, the precoding matrix is updated every m data according to the predefined using sequence of the precoding matrix. By adopting the method, when the physical control channel adopts a pre-coding transmission mode and cell special reference signal demodulation, the sending end does not need to inform the receiving end of pre-coding matrix information, and the method gives consideration to the diversity gain of the channel and the frequency hopping narrow band.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a transmission method and apparatus for a physical control channel, a sending end device, and a storage medium.
Background
In the Fourth Generation mobile Communication (4G) technology, an Enhanced Physical Downlink Control Channel (EPDCCH) and a Machine Type Communication Physical Downlink Control Channel (MPDCCH) adopt a Demodulation method based on a Demodulation Reference Signal (DMRS). To improve demodulation performance, MPDCCH may utilize Cell-specific reference signals (CRS) in the transmitted signal, such as CRS demodulation and joint demodulation of CRS and DMRS. However, in a CRS-based demodulation method, a receiving end needs to know a precoding matrix used for transmitting data to demodulate, and a transmitting end cannot notify the receiving end of precoding information of a control channel in real time;
therefore, the invention provides a transmission method of a control channel, which does not need to inform a receiving end of precoding information in a CRS-based demodulation mode and simultaneously improves the demodulation performance of the MPDCCH.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a method and an apparatus for transmitting a physical control channel, a sending end device, and a storage medium, so as to at least improve demodulation performance.
To solve the above technical problem, a method for transmitting a physical control channel in an embodiment of the present invention includes:
precoding the data sequence of the physical control channel by using a precoding matrix; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicating the number of control channel elements contained in a control channel,
indicates the number of physical resource blocks occupied by one control channel,
indicating the number of data resource units contained in one physical resource block.
In order to solve the above technical problem, a sending end device in an embodiment of the present invention includes a memory and a processor, where the memory stores a transmission computer program of a physical control channel, and the processor executes the computer program to implement the steps of the method.
To solve the above technical problem, a computer-readable storage medium according to an embodiment of the present invention stores a first computer program;
the first computer program is executable by at least one processor to implement the steps of the method as described above.
To solve the above technical problem, a method for transmitting a physical control channel in an embodiment of the present invention includes:
and sending L data signals of non-demodulation reference signals at the time frequency resource unit position of the demodulation reference signal of the physical control channel, wherein L is equal to 0 or L is equal to the number of the time frequency resource units of the demodulation reference signal.
In order to solve the above technical problem, a sending end device in an embodiment of the present invention includes a memory and a processor, where the memory stores a transmission computer program of a physical control channel, and the processor executes the computer program to implement the steps of the method.
To solve the above technical problem, a computer-readable storage medium according to an embodiment of the present invention stores a second computer program;
the second computer program is executable by at least one processor to implement the steps of the method as described above.
To solve the above technical problem, a transmission apparatus for a physical control channel in an embodiment of the present invention includes:
the precoding module is used for precoding the data sequence of the physical control channel by using the precoding matrix; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicating the number of control channel elements contained in a control channel,
indicating the number of physical resource blocks occupied by one control channel,
indicating the number of data resource units contained in one physical resource block.
To solve the above technical problem, a transmission apparatus for a physical control channel in an embodiment of the present invention includes:
a first sending unit, configured to send L data signals of non-demodulation reference signals at a time-frequency resource unit of a demodulation reference signal of a physical control channel, where L is equal to 0 or L is equal to the number of time-frequency resource units of the demodulation reference signal.
The invention has the following beneficial effects:
the embodiments of the invention can better diversity channel and frequency hopping narrow band fading condition, and effectively improve demodulation performance.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for transmitting a physical control channel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the RE position in the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The use of prefixes such as "first," "second," etc. to distinguish between elements is merely intended to facilitate the description of the invention and has no particular meaning in and of themselves.
Example one
The embodiment of the invention provides a transmission method of a control channel, which is used for a CRS demodulation mode, and comprises the following steps:
using a precoding matrix to perform precoding processing on a data sequence of a physical control channel; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicates the number of control channel elements contained in one control channel,
indicating the number of physical resource blocks occupied by one control channel,
indicating the number of data resource units contained in one material resource block. The physical resource block includes two slots (slots) in a time domain.
In the embodiment of the present invention, the precoding matrix usage order may be described as a precoding matrix usage order, a precoding usage order, and the like.
According to the embodiment of the invention, the precoding matrix is updated by taking m data as the updating granularity, so that the diversity gain of a channel and a frequency hopping narrow band can be better acquired, and the demodulation performance is improved; and the transmitting end uses the pre-coding matrixes according to the predefined using sequence of the pre-coding matrixes, and the receiving end knows the using sequence of the pre-coding matrixes, so that the transmitting end does not need to inform the receiving end of the information of the pre-coding matrixes during CRS demodulation.
In this embodiment, the resource element group also includes an Enhanced REG (EREG); the Control Channel Element also includes an Enhanced Control Channel Element (ECCE).
Alternatively, if
Updating the precoding once for each EREG data; if it is
The precoding is updated once for the data of each PRB. m may be a default configuration, or the sender may notify the receiver through a System Information Block (SIB); wherein the receiving end can be a terminal, etc.
Optionally, in this embodiment, the same precoding matrix is used for every m data, and the precoding matrix is updated every m data. Therefore, the control channel uses a plurality of precoding matrices within one transmission subframe, and a use order is predefined for the plurality of precoding matrices. On one hand, precoding is updated by taking a certain amount of data as update granularity, so that the fading conditions of a diversity channel and a frequency hopping narrow band can be better, and the demodulation performance is improved. On the other hand, based on the precoding matrix and the CRS-demodulated control channel, the receiving end needs to know the precoding matrix to complete demodulation, and the sending end cannot inform the precoding matrix of the change of the control channel in real time, so that a precoding using sequence is predefined, and the receiving end knows the precoding matrix if knowing the sequence, so that the receiving end can complete demodulation without informing the precoding information of the control channel by the sending end.
Meanwhile, the usage order of the predefined precoding matrix can also be changed on different subframes. Optionally, in the time domain, the precoding matrix usage order is updated every Y effective control channel subframes, and Y is greater than or equal to 1. The same precoding order is used every Y control channel subframes, and the precoding order is updated every Y subframes. Since CRS subframe joint channel estimation does not require the same precoding configuration between subframes, it can be considered that the precoding matrix usage order is updated once per control channel subframe, regardless of whether the control channel is transmitted repeatedly or non-repeatedly. Optionally, the size of Y is configured by default, or is notified to the receiving end by the transmitting end through a system information block. In addition, all control channel subframes can also use the same precoding sequence, and at this time, Y is equal to the number of transmission subframes of the control channel, and a value description related to Y is not needed.
In an optional embodiment of the present invention, the updating manner may include: the precoding matrix usage order is cyclically shifted by the initial precoding index [0,1, 2.., P-1] of the order to obtain an updated precoding matrix index order. That is, the initial precoding matrix index order is [0,1, 2.., P-1 ]; the updated precoding matrix index order is cyclic shift of [0,1, 2.., P-1], P is the number of available precodes, where the cyclic shift values can be positive integer, negative integer and 0. The control channel data cyclically employs precoding in accordance with the index order.
For example, the current precoding matrix index order is [0,1,2,3], and precoding is updated every 2 data for 16 data in total, then the precoding matrix index used by each data is [0,0,1,1,2,2,3,3,0,0,1,1,2,2,3,3] in turn, that is, precoding is updated every two data, and precoding is cyclically used in order.
For another example, the current precoding matrix index order is [1,2,3,0], and precoding is updated every 2 data for 16 data in total, and the precoding matrix index used for each data is [1,1,2,2,3,3,0,0,1,1,2,2,3,3,0,0 ].
Optionally, in this embodiment, in consideration of updating the usage order of the precoding matrix, the precoding matrix index used by the kth data is
J represents the j-th update of the precoding use order, j is greater than or equal to 0, s is a cyclic shift value, and when s is equal to 0, no cyclic shift exists, which indirectly also represents that all subframes of the control channel use the same precoding order.
For example, assuming that the initial precoding matrix index order is [0,1,2,3], precoding is updated every m to 2 data for 16 data, and cyclic shift s is 1, when j is 0, that is, precoding is not updated, the precoding matrix index used for the 5 th data is 2, and when j is 1, that is, precoding is updated for the first time, the precoding matrix index used for the 5 th data is 3.
Optionally, in this embodiment, the predefined precoding matrix usage order is a default configuration; or the transmitting end informs the receiving end of the using sequence of the precoding matrixes in the system information block. Wherein the predefined precoding matrix usage order may include: and updating the cyclic shift value related to the precoding matrix index sequence according to the initial precoding matrix index sequence.
In this embodiment, the old version receiving end supports the DMRS demodulation mode, and is not applicable to the precoding transmission method for CRS demodulation described in this embodiment. Therefore, in order to ensure the compatibility of the receiving end of the old version, in the public search space of the MPDCCH, the transmitting end defaults to use a precoding transmission method based on DMRS demodulation, so that the receiving ends of different types can normally process received signals; in a special search space of a receiving end of the MPDCCH, aiming at the receiving end with CRS demodulation capability, a transmitting end transmits a high-level configuration signaling and directly or indirectly indicates whether the receiving end adopts CRS demodulation. If so, the MPDCCH uses the precoding method of the embodiment; otherwise, the MPDCCH uses a precoding transmission method based on DMRS demodulation.
In this embodiment, the CRS demodulation, i.e., cell-specific reference signal demodulation, indicates that the receiving end is based on CRS demodulation; the DMRS demodulation, that is, demodulation of the demodulation reference signal, indicates that the receiving end demodulates based on the DMRS.
In this embodiment, the MPDCCH transmits a Downlink Control Information format (DCI format), where the DCI format is only used for single-codeword transmission of a Physical Downlink Shared Channel (PDSCH), and the DCI format supports the PDSCH to adopt multi-layer transmission. That is, the DCI format for the single codeword PDSCH supports PDSCH multi-layer transmission.
Optionally in this embodiment of the present invention, before performing precoding processing on the data sequence of the physical control channel by using the precoding matrix, the method may include:
and determining Qc precoding matrixes from the Q available precoding matrixes according to the using sequence of the precoding matrixes to obtain a transmission precoding matrix set for precoding.
Example two
The embodiment of the invention provides a transmission method of a control channel, which is used for a CRS and DMRS joint demodulation mode, and as shown in figure 2, the method comprises the following steps:
step 201, determining Qc precoding matrices from Q available precoding matrices according to a predefined precoding matrix usage order, to obtain a set of transmission precoding matrices for processing data.
The Q available precoding matrices represent all precoding matrices in the current transmit antenna number and transmission layer number configuration. For example, 2 transmit antennas are used for single-layer data transmission, the number of precoding matrices is 4, 4 transmit antennas are used for single-layer data transmission, and the number of precoding matrices is 16.
In the embodiment of the invention, by determining Qc precodes for data transmission from Q available precodes, the following problems can be effectively solved: the demodulation mode based on the combination of the CRS and the DMRS needs to use DMRS channel estimation, and for single-layer data transmission, one DMRS port channel estimation only can use the same precoding matrix, so that the control channel realizes precoding switching by adopting a mode of switching two DMRS ports, namely the two DMRS ports respectively correspond to two precoding matrices, and the two precoding matrices are mutually switched. Therefore, when joint demodulation is performed on CRS and DMRS, it is necessary to determine Qc precodes in a predefined order among Q available precodes to obtain a set of transmission precoding matrices for processing data.
In this embodiment, optionally, in the time domain, the precoding matrix included in the transmission precoding matrix set is updated once every Y effective control channel subframes, where Y is greater than or equal to 1. For a non-repetitive transmission mode of a control channel, a certain interval exists between every two effective control channel subframes, so that a receiving end can only perform channel estimation on a single subframe, and then each control channel subframe can be considered to update a precoding matrix contained in the transmission precoding matrix set once; for the repeated transmission mode of the control channel, in the repeated transmission period of the data block, the subframes of the control channel are adjacent, at this time, the receiving end can perform joint subframe channel estimation to improve the channel estimation performance, and the above mentioned DMRS channel estimation requires the precoding to be unchanged, so that correspondingly, every Y effective control channel subframes are configured to update the precoding matrix included in the transmission precoding matrix set once, and Y is equal to the number of the joint subframes of the channel estimation. Optionally, the size of Y is configured by default, or the sending end notifies the receiving end through a system information block.
Optionally, in the frequency domain, the precoding matrix included in the set of transmission precoding matrices is updated once per physical resource block. If the DMRS adopts single RB channel estimation in a frequency domain, each RB can be configured to update a precoding matrix contained in the transmission precoding matrix set once; optionally, if the DMRS adopts multi-RB joint channel estimation in the frequency domain, the DMRS may be configured to update the precoding matrix included in the transmission precoding matrix set once every X RBs, where X is equal to the number of joint RBs for channel estimation; optionally, in the frequency domain, all RBs use the same set of transmission precoding matrices, and the precoding matrices included in the RBs are not updated.
Step 202, using a precoding matrix to perform precoding processing on a data sequence of a physical control channel; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
representing a control channel element packetThe number of resource unit groups contained in the resource unit group,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicating the number of control channel elements contained in a control channel,
indicating the number of physical resource blocks occupied by one control channel,
indicating the number of data resource units contained in one physical resource block. The RB includes two slots (slots) in a time domain.
Alternatively, if
Updating the precoding once for each EREG data; if it is
The precoding is updated once for data of each RB. m is a default configuration, or the sending end informs the receiving end through SIB.
Optionally, in this embodiment, the same precoding matrix is used for every m data, and the precoding matrix is updated every m data, where the precoding matrix is from the set of transmission precoding matrices in step 201.
In an optional embodiment of the present invention, the default order of the Q available precoding indexes is [0,1,2,., Q-1], and the initial precoding matrix set includes precoding matrices with an index order of [0,1,2,., Qc-1 ].
For example, 2 transmit antenna single-layer transmission configurations include 4 available precoding matrices, and two DMRS port switches correspond to two different precoding matrix switches, then the index of the precoding matrix included in the initial set of transmission precoding matrices is [0,1 ]. If the precoding is updated every 2 data for 16 data in total, the precoding matrix index used for each data is [0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1] in turn.
Optionally, the precoding matrix index used by the kth data considering the update of the transmission precoding matrix set is
Wherein j represents the j-th update of the transmission precoding matrix set in the time domain, and j is greater than or equal to 0.
For example, a 4-transmit antenna single-layer transmission configuration includes 16 available precoding matrices, two DMRS port switches correspond to two different precoding matrix switches, and if 16 data are updated once every m-2 data, when j-0 is defined as that the transmission precoding matrix set is not updated, the precoding matrix index used by the 5 th data is 0, when j-1 is defined as that the transmission precoding matrix set is updated for the first time, the precoding matrix index used by the 5 th data is 2, and when j-4 is defined as that the transmission precoding matrix set is updated for the 4 th time, the precoding matrix index used by the 5 th data is 8.
When joint demodulation of CRS and DMRS is employed, optionally, a CRS port and a DMRS port satisfy: the channel of the CRS port is multiplied by the precoding matrix used by the kth data and is equivalent to the channel of the demodulation reference signal port where the kth data is located. That is, channel H of CRS portCRSMultiplying by the precoding matrix W used by the kth datakChannel H equivalent to DMRS port where the kth data is locatedk,DMRSI.e. HCRS×Wk＝Hk,DMRS. Optionally, if the CRS and DMRS transmit powers are different and the ratio of the DMRS to the CRS transmit power is ρ, then channel H of the CRS portCRSMultiplying by the precoding matrix W used by the kth datakMultiplying by a power ratio rho to obtain a channel H equivalent to the DMRS port where the kth data is positionedk,DMRSI.e. HCRS×Wk×ρ＝Hk,DMRS。
Optionally, the CRS port and DMRS port satisfy: and the DMRS is mapped to the CRS port through precoding processing, or the CRS signal is mapped to the DMRS port through precoding processing.
Optionally, the transmitting end configures 2 transmitting antennas, and switches the transmitting antenna or CRS port every m data, which is equivalent to [ 1; 0] and [ 0; 1] two precoding matrices, the precoding matrices being updated every m data. At this time, the CRS ports and DMRS ports correspond one to one.
In this embodiment, a transmitting end transmits a high-level configuration signaling to a receiving end, where the high-level configuration signaling directly or indirectly indicates a power ratio of a DMRS to a CRS.
Optionally, in this embodiment, the predefined precoding matrix usage order is a default configuration; or the transmitting end notifies the receiving end in a system information block. Wherein the predefined precoding order comprises: and initializing a precoding matrix and a precoding matrix index sequence contained in the transmission precoding matrix set.
It should be noted that, the transmission precoding matrix set refers to Qc precoding matrices used for data transmission, and in practical applications, the concept of the transmission precoding matrix set may not be defined, and the transmission precoding matrix set is defined herein for convenience of description.
In this embodiment, optionally, an old-version receiving end supports a DMRS demodulation manner, and can be applied to the precoding transmission method based on CRS and DMRS joint demodulation described in this embodiment. Therefore, the precoding method described in this embodiment does not have the problem of compatibility with the old version receiving end. In the public search space of the MPDCCH, the transmitting end uses the precoding method described in this embodiment, and accordingly, the old version receiving end uses DMRS for demodulation, and the new version receiving end uses CRS and DMRS for joint demodulation.
Optionally, in a common search space of the MPDCCH, the transmitting end uses a precoding transmission method based on DMRS demodulation, that is, an existing transmission method, and accordingly, different types of receiving ends all use DMRS demodulation.
Optionally, in a common search space of the MPDCCH, for a receiving end with CRS demodulation capability, a transmitting end transmits a system information block to directly or indirectly notify whether CRS and DMRS joint demodulation is used, and if so, the transmitting end adopts the precoding method of this embodiment; otherwise, the sending end adopts a precoding transmission method based on DMRS demodulation.
In a terminal-specific search space of the MPDCCH, a transmitting end transmits a high-level configuration signaling and directly or indirectly indicates whether a receiving end adopts CRS and DMRS joint demodulation. If so, the MPDCCH uses the precoding method of the embodiment; otherwise, the MPDCCH uses a precoding transmission method based on DMRS demodulation.
In this embodiment, the CRS demodulation, i.e., cell-specific reference signal demodulation, indicates that the receiving end demodulates based on the CRS; the CRS and DMRS joint demodulation, namely the cell-specific reference signal and the demodulation-specific reference signal joint demodulation, indicates that the receiving end performs joint demodulation based on the CRS and the DMRS.
In this embodiment, the MPDCCH transmits a Downlink Control Information format (DCI format), where the DCI format is only used for single-codeword transmission of a Physical Downlink Shared Channel (PDSCH), and the DCI format supports the PDSCH to adopt multi-layer transmission. That is, the DCI format for the single codeword PDSCH supports PDSCH multi-layer transmission.
EXAMPLE III
The embodiment of the invention provides a transmission method of a physical control channel, which is used for a CRS demodulation mode and comprises the following steps:
and sending L data signals of non-demodulation reference signals at the time frequency resource unit position of the demodulation reference signal of the physical control channel, wherein L is equal to 0 or L is equal to the number of the time frequency resource units of the demodulation reference signal. Wherein the physical control channel may include EPDCCH and MPDCCH.
In an optional embodiment of the present invention, the demodulation reference signal of the physical control channel is a DMRS with 4 ports, and occupies 24 REs on one PRB, where a specific RE position is shown in fig. 2.
When the physical control channel adopts CRS demodulation, the transmitting end does not need to transmit DMRS. The saved DMRS time-frequency resource units are effectively utilized, and the demodulation performance can be improved. Therefore, the non-DMRS signal is transmitted on the DMRS resource element originally in the control channel.
Optionally, the CRS is transmitted on DMRS time-frequency resource element positions of the physical control channel. Based on the mode, 24 CRS REs are added to each PRB and are jointly used for controlling channel demodulation with the original CRS REs, so that the accuracy of channel estimation can be greatly improved, and the demodulation performance is further improved.
Optionally, the data of the control channel is sent at a time-frequency resource unit position of the demodulation reference signal of the physical control channel. That is, control channel data is transmitted on DMRS time-frequency resource element locations of a physical control channel. This increases the number of data REs, thereby enabling a reduction in the code rate of the control channel data and thus improving demodulation performance.
Optionally, no signal or a 0 power signal is sent at the time-frequency resource unit position of the demodulation reference signal of the physical control channel, and power enhancement is performed on the time-domain transmission symbol where the demodulation reference signal is located. Data or reference signals are not sent on the DMRS resource units any more, and the saved sending power is used for enhancing the power of other data REs on the OFDM symbol where the DMRS is located. Demodulation performance is improved by power enhancement.
Example four
The embodiment of the invention provides a transmission device of a physical control channel, which comprises:
the precoding module is used for precoding the data sequence of the physical control channel by using the precoding matrix; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicating the number of control channel elements contained in a control channel,
indicates the number of physical resource blocks occupied by one control channel,
indicating the number of data resource units contained in one physical resource block.
The device in the embodiment of the present invention corresponds to the method in the first embodiment and the method in the second embodiment, and when the device is specifically implemented, reference may be made to corresponding parts in the first embodiment and the second embodiment, so that a corresponding technical effect is achieved.
Optionally, the apparatus may further include: and the sequence updating module is used for updating the use sequence of the precoding matrix once every Y effective control channel subframes in a time domain, wherein Y is more than or equal to 1.
Optionally, the updating manner may include:
and circularly shifting the initial precoding matrix index sequence [0,1, 2., P-1] of the precoding matrix use sequence to obtain an updated precoding matrix index sequence, wherein P is the number of available precoding matrixes.
Optionally, the precoding matrix index of the precoding matrix used by the kth data is
Wherein j represents the j-th update of the using sequence of the precoding matrix, and s is a cyclic shift value.
Optionally, the apparatus may further include: and the matrix selection module is used for determining Qc precoding matrixes from the Q available precoding matrixes according to the using sequence of the precoding matrixes to obtain a transmission precoding matrix set for precoding.
Optionally, the apparatus may further include: and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once every Y effective control channel subframes in a time domain, wherein Y is more than or equal to 1.
Optionally, the apparatus may further include: and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once per effective control channel subframe for non-repeated transmission.
Optionally, the apparatus may further include: and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once in each physical resource block on a frequency domain.
Wherein an index of a precoding matrix included in the initial set of the transmission precoding matrix set is [0,1, 2.
Wherein the precoding matrix index used by the kth data is
Wherein j represents j th update of the transmission precoding matrix set in time domain.
The special reference signal port and the demodulation reference signal port of the cell meet the following conditions: the channel of the CRS port is multiplied by the precoding matrix used by the kth data and is equivalent to the channel of the demodulation reference signal port where the kth data is located, or the demodulation reference signal is mapped to the cell dedicated reference signal port through precoding processing, or the cell dedicated reference signal is mapped to the demodulation reference signal port through precoding processing.
Wherein, the using sequence of the precoding matrix is a default configuration, or the using sequence of the precoding matrix is informed to a receiving end in a system information block.
In this example, when the transmitting end configures 2 transmitting antennas, the cell-specific reference signal port corresponds to a demodulation reference signal port.
Optionally, the apparatus further comprises: a sending module, configured to send a high-level configuration signaling to a receiving end, where the high-level configuration signaling directly or indirectly indicates a power ratio of a demodulation reference signal to a cell-specific reference signal.
Optionally, the apparatus further comprises: the transmission module is used for transmitting a downlink control information format in a physical downlink control channel, wherein the downlink control information format is used for single code word transmission of a physical downlink shared channel, and the physical downlink shared channel is transmitted in multiple layers in the downlink control information format.
Wherein, the using sequence of the precoding matrix is a default configuration, or the using sequence of the precoding matrix is informed to a receiving end in a system information block.
Optionally, the apparatus further comprises: a sending module, configured to send a high-level configuration signaling to a receiving end, where the high-level configuration signaling directly or indirectly indicates whether to use a cell-specific reference signal during demodulation; the using the cell-specific reference signal in the demodulation includes: cell-specific reference signal demodulation, or cell-specific reference signal and demodulation reference signal joint demodulation.
EXAMPLE five
An embodiment of the present invention provides a transmission apparatus for a physical control channel, where the apparatus may include:
a first sending unit, configured to send L data signals of non-demodulation reference signals at a time-frequency resource unit of a demodulation reference signal of a physical control channel, where L is equal to 0 or L is equal to the number of time-frequency resource units of the demodulation reference signal.
The device in the embodiment of the present invention corresponds to the method in the third embodiment, and when the device is specifically implemented, reference may be made to corresponding parts in the third embodiment, so that a corresponding technical effect is achieved.
Optionally, the apparatus may further include: and a second sending unit, configured to send the CRS at a time-frequency resource unit position of the demodulation reference signal of the physical control channel.
Optionally, the apparatus may further include: and a third sending unit, configured to send data of the control channel at a time-frequency resource unit position of the demodulation reference signal of the physical control channel.
Optionally, the apparatus may further include: a fourth sending unit, configured to send no signal or a 0 power signal at a time-frequency resource unit of the demodulation reference signal of the physical control channel, and perform power enhancement on a time-domain transmission symbol where the demodulation reference signal is located.
EXAMPLE six
An embodiment of the present invention provides a sending-end device, where the device includes a memory and a processor, where the memory stores a transmission computer program of a physical control channel, and the processor executes the computer program to implement the steps of the method according to any one of the first to second embodiments.
EXAMPLE seven
An embodiment of the present invention provides a sending-end device, where the device includes a memory and a processor, where the memory stores a transmission computer program of a physical control channel, and the processor executes the computer program to implement the steps of the method according to any one of the third embodiment.
Example eight
An embodiment of the present invention provides a computer-readable storage medium, in which a first computer program and/or a second computer program are stored;
the first computer program is executable by at least one processor to implement the steps of the method of any one of embodiments one to two;
the second computer program is executable by at least one processor to perform the steps of the method according to any of the third embodiment.
When the sixth to eighth embodiments are specifically implemented, reference may be made to the first to third embodiments, so that corresponding technical effects are achieved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a receiving end (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (32)
1. A method for transmitting a physical control channel, the method comprising:
using a precoding matrix to perform precoding processing on a data sequence of a physical control channel; in the processing process, updating the precoding matrix once every m data according to the predefined precoding matrix using sequence, wherein the precoding matrix is updated once
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicates the number of control channel elements contained in one control channel,
indicates the number of physical resource blocks occupied by one control channel,
representing the number of data resource units contained in one physical resource block;
and updating the use sequence of the precoding matrix once every Y effective control channel subframes in the time domain, wherein Y is more than or equal to 1.
2. The method of claim 1, wherein the manner of updating comprises:
and circularly shifting the initial precoding matrix index sequence [0,1, 2., P-1] of the precoding matrix use sequence to obtain an updated precoding matrix index sequence, wherein P is the number of available precoding matrixes.
3. The method of claim 2, wherein the method further comprises:
the precoding matrix index used for the kth data is
Wherein j represents the j-th update of the using sequence of the precoding matrix, and s is a cyclic shift value.
4. The method of claim 1, wherein the precoding the data sequence of the physical control channel using the precoding matrix comprises:
and determining Qc precoding matrixes from the Q available precoding matrixes according to the using sequence of the precoding matrixes to obtain a transmission precoding matrix set for precoding.
5. The method of claim 4, wherein the method further comprises:
and updating the precoding matrix contained in the transmission precoding matrix set once every Y effective control channel subframes in the time domain, wherein Y is more than or equal to 1.
6. The method of claim 4, wherein the method further comprises:
for non-repeated transmission, updating the precoding matrix contained in the transmission precoding matrix set once per effective control channel subframe.
7. The method of claim 4, wherein the method further comprises:
and updating the precoding matrix contained in the transmission precoding matrix set once per physical resource block in a frequency domain.
8. The method of claim 4, wherein the initial set of transmission precoding matrices comprises a precoding matrix index order of [0,1, 2.., Qc-1 ].
9. The method of any of claims 4-8, wherein the precoding matrix index used for the kth data is
Wherein j represents j th update of the transmission precoding matrix set in time domain.
10. The method of claim 1 or 4, wherein the method further comprises:
the cell dedicated reference signal port and the demodulation reference signal port satisfy: the channel of the cell-specific reference signal port multiplied by the precoding matrix used by the kth data is equivalent to the channel of the demodulation reference signal port where the kth data is located, or the demodulation reference signal is mapped to the cell-specific reference signal port through precoding processing, or the cell-specific reference signal is mapped to the demodulation reference signal port through precoding processing.
11. The method of claim 10, wherein the method further comprises:
when the transmitting end is configured with 2 transmitting antennas, the cell-specific reference signal port corresponds to a demodulation reference signal port.
12. The method of claim 10, wherein the method further comprises:
and sending a high-level configuration signaling to a receiving end, wherein the high-level configuration signaling directly or indirectly indicates the power ratio of the demodulation reference signal to the cell dedicated reference signal.
13. The method of claim 1, wherein the method further comprises:
the physical downlink control channel transmits a downlink control information format, the downlink control information format is only used for single code word transmission of a physical downlink shared channel, and the downlink control information format supports the physical downlink shared channel to adopt multi-layer transmission.
14. The method according to any of claims 1-8, wherein the precoding matrix usage order is a default configuration or is signaled to a receiving end in a system information block.
15. The method of any one of claims 1-8, further comprising:
sending a high-level configuration signaling to a receiving end, wherein the high-level configuration signaling directly or indirectly indicates whether a cell dedicated reference signal is used during demodulation; the using the cell-specific reference signal in the demodulation includes: cell-specific reference signal demodulation, or cell-specific reference signal and demodulation reference signal joint demodulation.
16. An apparatus for transmitting a physical control channel, the apparatus comprising:
the precoding module is used for precoding the data sequence of the physical control channel by using the precoding matrix; in the processing process, updating the precoding matrix once every m data according to the predefined using sequence of the precoding matrix, wherein the precoding matrix is updated every m data
Wherein the content of the first and second substances,
indicating the number of data resource units contained in one resource unit group,
indicating the number of resource element groups contained in one control channel element,
indicates the number of resource unit groups contained in one physical resource block,
indicates the number of control channel elements contained in one physical resource block,
indicating the number of control channel elements contained in a control channel,
indicating the number of physical resource blocks occupied by one control channel,
representing the number of data resource units contained in one physical resource block;
and the sequence updating module is used for updating the use sequence of the precoding matrix once every Y effective control channel subframes in a time domain, wherein Y is more than or equal to 1.
17. The apparatus of claim 16, wherein the manner of updating comprises:
and circularly shifting the initial precoding matrix index sequence [0,1, 2., P-1] of the precoding matrix use sequence to obtain an updated precoding matrix index sequence, wherein P is the number of available precoding matrixes.
18. Such as the rightThe apparatus of claim 17, wherein the precoding matrix index of the precoding matrix used for the kth data is
Wherein j represents the j-th update of the using sequence of the precoding matrix, and s is a cyclic shift value.
19. The apparatus of claim 16, wherein the apparatus further comprises:
and the matrix selection module is used for determining Qc precoding matrixes from the Q available precoding matrixes according to the using sequence of the precoding matrixes to obtain a transmission precoding matrix set for precoding.
20. The apparatus of claim 19, wherein the apparatus further comprises:
and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once every Y effective control channel subframes in a time domain, wherein Y is more than or equal to 1.
21. The apparatus of claim 19, wherein the apparatus further comprises:
and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once per effective control channel subframe for non-repeated transmission.
22. The apparatus of claim 19, wherein the apparatus further comprises:
and the set updating module is used for updating the precoding matrix contained in the transmission precoding matrix set once by each physical resource block in a frequency domain.
23. The apparatus of claim 19, wherein the initial set of the set of transmission precoding matrices includes a precoding matrix index of [0,1, 2.., Qc-1 ].
24. The apparatus according to any of claims 19-23, wherein the precoding matrix index used for the kth data is
Wherein j represents the j-th update of the transmission precoding matrix set in the time domain.
25. The apparatus of claim 16 or 19, wherein the cell-specific reference signal port and the demodulation reference signal port satisfy: the channel of the cell-specific reference signal port multiplied by the precoding matrix used by the kth data is equivalent to the channel of the demodulation reference signal port where the kth data is located, or the demodulation reference signal is mapped to the cell-specific reference signal port through precoding processing, or the cell-specific reference signal is mapped to the demodulation reference signal port through precoding processing.
26. The apparatus according to any of claims 16-23, wherein the precoding matrix usage order is a default configuration or is signaled to a receiving end in a system information block.
27. The apparatus of claim 26,
when the transmitting end is configured with 2 transmitting antennas, the cell-specific reference signal port corresponds to a demodulation reference signal port.
28. The apparatus of claim 26, wherein the apparatus further comprises:
a sending module, configured to send a high-level configuration signaling to a receiving end, where the high-level configuration signaling directly or indirectly indicates a power ratio of a demodulation reference signal to a cell-specific reference signal.
29. The apparatus of claim 16, wherein the apparatus further comprises:
the transmission module is used for transmitting a downlink control information format in a physical downlink control channel, wherein the downlink control information format is only used for single code word transmission of a physical downlink shared channel, and the physical downlink shared channel is supported by the downlink control information format to adopt multilayer transmission.
30. The apparatus of any one of claims 16-23, wherein the apparatus further comprises:
a sending module, configured to send a high-level configuration signaling to a receiving end, where the high-level configuration signaling directly or indirectly indicates whether to use a cell-specific reference signal during demodulation; the using the cell-specific reference signal in the demodulation includes: cell-specific reference signal demodulation, or cell-specific reference signal and demodulation reference signal joint demodulation.
31. A transmitting device, characterized in that the device comprises a memory storing a transmission computer program of a physical control channel and a processor executing the computer program to implement the steps of the method according to any of claims 1-15.
32. A computer-readable storage medium, characterized in that the storage medium stores a first computer program and/or a second computer program;
the first computer program is executable by at least one processor to perform the steps of the method of any one of claims 1 to 15.
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