CN102904839A - Channel estimating method, and data transmission method and equipment - Google Patents

Abstract

Embodiments of the present invention provide a channel estimation method, a data sending method and a device. A method includes: receiving data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair; if the value of the codebook subset restriction signaling is greater than 4, use the The channel estimation of the control channel is performed by means of more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair; if the value of the codebook subset restriction signaling is less than or equal to 4, use the The channel estimation of the control channel is performed in a manner that the same pilot time-frequency resource in the block pair has pilot symbols of less than or equal to 2 layers. The embodiment of the present invention aims at the situation that the control channel and the data channel share the same resource block pair, and the receiving end device can correctly estimate the actual channel, thereby ensuring correct demodulation of the control channel.

Description

Channel estimation method, data transmission method and device

technical field

The embodiments of the present invention relate to communication technologies, and in particular to a channel estimation method, a data sending method and equipment.

Background technique

Long Term Evolution (hereinafter referred to as: LTE) or Advanced Long Term Evolution (Long Term Evolution Advanced, hereinafter referred to as: LTE-A) technology uses pilot symbols to obtain channel estimates, and uses the channel estimates to decipher the data. Tune.

In the prior art, the time-frequency resource unit used for data transmission is a resource block (Resource Block, hereinafter referred to as: RB), and the entire frequency band can be divided into multiple RB pairs (hereinafter referred to as: RB pair), and each RB pair is In the time domain, corresponding to two time slots (hereinafter referred to as slots), multiple sets of pilot symbols and multi-layer data symbols are transmitted on the same RB pair, and multiple sets of pilot symbols are code-division or time-frequency division multiplexed In this way, each layer of data symbols corresponds to a set of pilot symbols. In LTE or LTE-A, the sending end device can transmit a physical downlink control channel (X-Physical Downlink Control Channel, hereinafter referred to as: X-PDCCH) on a slot of an RB pair, and transmit it on another slot Physical Downlink Shared Channel (Physical Downlink Shared Channel, hereinafter referred to as: PDSCH). The X-PDCCH is used to transmit the control information of the downlink shared channel. The receiver device first receives the X-PDCCH, decodes the control information required for receiving the PDSCH, and then decodes the PDSCH. The X-PDCCH and PDSCH transmitted in the same RB pair use the same pilot for channel estimation, that is, use the same orthogonal code length for channel estimation.

However, the inventors found in the process of implementing the present invention that in the prior art, when performing the channel estimation of the above-mentioned X-PDCCH, the problem that the actual channel cannot be estimated often occurs, which leads to X-PDCCH demodulation errors.

Contents of the invention

Embodiments of the present invention provide a channel estimation method, a data sending method and a device.

An embodiment of the present invention provides a channel estimation method, including:

receiving data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair;

If the value of the codebook subset restriction signaling is greater than 4, the channel estimation of the control channel is performed in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair;

If the value of the codebook subset restriction signaling is less than or equal to 4, the channel estimation of the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

Correspondingly, an embodiment of the present invention provides a receiver device, including:

A data receiving module, configured to receive data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair;

A processing module, configured to, if the value of the codebook subset restriction signaling is greater than 4, execute the control channel in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair Channel estimation; if the value of the codebook subset restriction signaling is less than or equal to 4, the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair channel estimation.

In the above embodiments of the present invention, after receiving the data sent by the sending device on the RB pair, the receiving device can know the number of data transmission layers on the data channel on the RB pair through the codebook subset restriction signaling, so that according to The number of data transmission layers knows the number of layers of pilot symbols superimposed on the same pilot time-frequency resource in the RB pair, so that the number of layers of pilot symbols is greater than the corresponding method of 2 layers or the layer of pilot symbols can be used The channel estimation of the control channel is performed in a way corresponding to the number of layers greater than 4, so that the actual channel can be correctly estimated, and then the correct demodulation of the control channel can be ensured.

An embodiment of the present invention provides another channel estimation method, including:

Receiving signaling sent by the sending end device, the signaling includes indication information indicating whether the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein the control channel and the data channel share all resource block pair;

If the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2, then use more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair. performing channel estimation of the control channel in the form of frequency symbols;

If the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is less than or equal to 2, then the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is less than or equal to 2 The channel estimation of the control channel is performed by means of layer pilot symbols.

Correspondingly, an embodiment of the present invention provides another receiver device, including:

The signaling receiving module is configured to receive the signaling sent by the sending end device, the signaling includes indication information indicating whether the number of layers of the pilot symbol on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein, The control channel and the data channel share the resource block pair;

A channel estimation module, configured to use the same pilot time-frequency resource in the resource block pair if the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2 The channel estimation of the control channel is performed by means of more than 2 layers of pilot symbols, and if the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is less than or equal to 2, then adopt The channel estimation of the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

An embodiment of the present invention provides a method for sending data, including:

Send signaling to the receiving end device, the signaling includes indication information indicating whether the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein the control channel and the data channel share the A pair of resource blocks, so that the receiving end device performs channel estimation of the control channel according to the indication information.

Correspondingly, an embodiment of the present invention provides a sending end device, including:

The signaling sending module is used to send signaling to the receiving end device, and the signaling includes indication information indicating whether the number of layers of the pilot symbol on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein the control The channel and the data channel share the resource block pair, so that the receiving end device performs channel estimation of the control channel according to the indication information.

The above-mentioned embodiments of the present invention aim at the situation that the control channel and the data channel share the same RB pair, the receiving end device can receive the signaling sent by the sending end device before performing the channel estimation of the control channel in the RB pair, and through the signaling Indicates whether the number of layers of pilot symbols on the same pilot time-frequency resource contained in the resource block pair is greater than 2. The receiving end device can use the corresponding channel estimation method to perform channel estimation of the control channel, so that it can correctly estimate out of the actual channel, thereby ensuring the correct demodulation of the control channel.

An embodiment of the present invention provides a channel estimation method, including:

receiving data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair;

The channel estimation of the control channel is performed in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

Correspondingly, an embodiment of the present invention provides a receiver device, including:

The receiving module is configured to receive data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair;

A channel estimation module, configured to perform channel estimation of the control channel in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

In the above-mentioned embodiments of the present invention, in view of the situation that the control channel and the data channel share the same RB pair, when the receiving end device performs channel estimation of the control channel in the RB pair, the same pilot time-frequency in the RB pair is fixedly used There are more than 2 layers of pilot symbols on the resource for channel estimation of the control channel, so that the actual channel can be correctly estimated, and then the correct demodulation of the control channel can be ensured. The solution is simple and reliable, and effectively reduces the complexity of the terminal.

An embodiment of the present invention provides a method for sending data, including:

Determine whether the number of layers N of data to be transmitted by the data channel to be sent is greater than 4, 1≤N≤8;

If so, send M-layer data and corresponding M groups of pilot symbols on a resource block pair, where 1≤M≤4, the M-layer data refers to the M corresponding to the same codeword in the N-layer data For the data of the data layer, the number of layers of the M groups of pilot symbols on the same pilot time-frequency resource is less than or equal to 2 layers, and the resource block pair refers to the resource block pair shared by the data channel and the control channel.

Correspondingly, an embodiment of the present invention provides a sending end device, including:

A determination module, configured to determine whether the number of layers N of data to be transmitted by the data channel to be transmitted is greater than 4, 1≤N≤8;

The sending module is used to send M layer data and corresponding M groups of pilot symbols on a resource block pair if the determination module determines that the number of layers N of data to be transmitted by the data channel to be sent is greater than 4, wherein, 1≤M≤4, the M-layer data refers to the data of M data layers corresponding to the same codeword in the N-layer data, and the number of layers of the M groups of pilot symbols on the same pilot time-frequency resource Less than or equal to layer 2, the resource block pair refers to the resource block pair shared by the data channel and the control channel.

In the above embodiments of the present invention, on the RB pair shared by the control channel and the data channel, the maximum number of layers of downlink data sent by the sending device to the receiving device is 4, that is, there are at most 2 layers of pilot symbols sharing the same time and frequency resource. Therefore, for the receiving end device, the channel estimation of the control channel can be performed by default using the same pilot time-frequency resource in the RB pair with less than or equal to 2 layers of pilot symbols. Specifically, the receiving end device can jointly The pilot symbol received by the resource block where the control channel is located in the RB pair is used for channel estimation of the control channel, so as to avoid the situation that the receiving end device cannot correctly demodulate the control channel.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flow chart of Embodiment 1 of the channel estimation method of the present invention;

FIG. 2 is a schematic structural diagram of an RB pair in Embodiment 1 of the channel estimation method shown in FIG. 1;

FIG. 3 is a flowchart of Embodiment 2 of the channel estimation method of the present invention;

FIG. 4 is a flow chart of Embodiment 3 of the channel estimation method of the present invention;

FIG. 5 is a flowchart of an embodiment of the data sending method of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 1 of the receiving end device of the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 2 of the receiving end device of the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 3 of the receiving end device of the present invention;

FIG. 9 is a schematic structural diagram of an embodiment of a sending end device according to the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

FIG. 1 is a flow chart of Embodiment 1 of the channel estimation method of the present invention. As shown in FIG. 1, the method of this embodiment may include:

Step 101. Receive data sent by a sending end device on a resource block pair, wherein a control channel and a data channel share the resource block pair.

Step 102, if the value of the codebook subset restriction signaling is greater than 4, perform channel estimation of the control channel in the manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair .

Step 103: If the value of the codebook subset restriction signaling is less than or equal to 4, the control channel is implemented in the manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair channel estimation.

The technical solution of Embodiment 1 of the channel estimation method of the present invention shown in FIG. 1 will be described in detail below with reference to FIG. 2 .

Figure 2 is a schematic structural diagram of the RB pair in Embodiment 1 of the channel estimation method shown in Figure 1. As shown in Figure 2, the RB pair includes slot1 and slot2, and the RB pair includes 14 symbols in the time domain (hereinafter referred to as: symbol ), including 12 subcarriers (hereinafter referred to as: subcarrier) in the frequency domain, the pilot symbols of the demodulation pilot (Demodulation Reference Signal, hereinafter referred to as: DMRS) occupy the 5th and 6th symbols in the RB pair on slot1, Occupy the 12th and 13th symbols in the RB pair on slot2. There is an RB pair, in which the X-PDCCH is transmitted on slot1, and the PDSCH is transmitted on slot2. PDSCH and X-PDCCH use the same pilot symbols for channel estimation, that is, use the subset or full set of DMRS symbols occupying the 5th, 6th, 12th and 13th symbols for channel estimation. The number of layers of the DMRS symbol is the same as the number of data layers transmitted on the PDSCH, and each layer of data corresponds to a set of pilot symbols, so as to estimate the channel experienced by the data layer.

If the receiver device can support up to 8 layers of data transmission, the sender device needs to transmit up to 8 sets of pilot symbols in one RB pair. Some of these 8 sets of pilot symbols are distinguished by different time-frequency resources, and some are code-divided. . For example, when supporting 8-layer data transmission, the 1st, 2nd, 5th, and 7th groups of pilot symbols occupy the same DMRS time-frequency resources, that is, the dark DMRS resource part in Figure 2, then the 1st, 2nd, 5th, and 7th groups Group pilot symbols need to be transmitted on the same time-frequency resource through code division, that is, at this time, there are 4 layers (more than 2 layers) of pilot symbols on the same pilot time-frequency resource in the RB pair; , 6 and 8 groups of pilot symbols occupy the same DMRS time-frequency resource, that is, the light-colored DMRS resource part in Figure 2, that is, at this time, there are 4 layers (greater than Layer 2) pilot symbols. Specifically, the orthogonal codes used by the eight groups of pilot symbols are shown in Table 1, for example.

If a receiver device supports at most 4 layers of data transmission, the sender device needs to transmit at most 4 sets of pilot symbols in one RBpair. The first and second groups of pilot symbols can occupy the same DMRS time-frequency resources, as shown in the dark DMRS resource part in Figure 2, therefore, the first and second groups of pilot symbols need to be divided into the same time-frequency resources by code Uplink transmission, that is, at this time, there are 2 layers (less than or equal to 2 layers) of pilot symbols on the same pilot time-frequency resource in the RB pair. The 3rd and 4th groups of pilot symbols can occupy the same DMRS time-frequency resource, as shown in the light-colored DMRS resource part in Figure 2. Similarly, at this time, there are 2 layers on the same pilot time-frequency resource in the RB pair (less than or equal to 2 layers) pilot symbols.

The pilot signals corresponding to the 4-layer data transmission can be processed by using the orthogonal code sequences with numbers 1 to 4 in Table 1 below.

Table 1

serial number Orthogonal code sequence 1 [+1+1+1+1] 2 [+1-1+1-1] 3 [+1+1+1+1] 4 [+1-1+1-1] 5 [+1+1-1-1] 6 [-1-1+1+1] 7 [+1-1-1+1] 8 [-1+1+1-1]

It can be seen that when the number of data transmission layers is less than or equal to 4, there are at most 2 layers of pilot symbols on the same pilot time-frequency resource in the RB pair. At this time, the 2 groups of DMRS superimposed on the 5th and 6th symbols are mutually Orthogonal, the two sets of DMRS symbols superimposed on the 12th and 13th symbols are orthogonal to each other, so the receiving end device can combine the DMRS symbols received on the 5th and 6th symbols to perform channel estimation of the control channel. When the number of data transmission layers is greater than 4, there are at least 3 layers of pilot symbols on the same pilot time-frequency resource in the RB pair. At this time, the receiving device needs to combine the 5th, 6th, 12th, and 13th symbols to obtain 4 Orthogonality between DMRS symbols in a group, therefore, the receiver device needs to combine the DMRS symbols received on the 5th, 6th, 12th, and 13th symbols to perform channel estimation of the control channel.

Therefore, if the receiver device wants to perform correct channel estimation on the control channel, it must first obtain several layers of pilot symbols on the same pilot time-frequency resource in the RB pair, so that the corresponding channel estimation method can be used to perform control channel estimation. channel estimation. However, the number of layers of pilot symbols existing on the same pilot time-frequency resource in the RB pair depends on the number of layers of data transmitted on the PDSCH. However, after receiving the RB pair shown in Figure 2, the receiving device first needs to perform channel estimation on the X-PDCCH. At this time, the receiving device does not know the number of data layers of the PDSCH transmitted in slot2. Therefore, the receiving The end device cannot know how many layers of DMRS symbols are superimposed on the same time-frequency resource, and thus cannot know the channel estimation method of the control channel to be used. If the receiving end device thinks that at most 2 layers of DMRS are superimposed on the same time-frequency resource, but in fact the number of transmission layers of PDSCH is greater than 4, the receiving end device cannot estimate the actual channel and thus cannot demodulate X-PDCCH.

This embodiment proposes a solution to the problem that the receiver device in the prior art cannot know which channel estimation method to use to perform X-PDCCH channel estimation on the RB pair shown in FIG. 2 .

In this embodiment, the receiver device can obtain the number of data transmission layers on the PDSCH by using the codebook subset restriction signaling CodebookSubsetRestriction. The CodebookSubsetRestriction signaling is a high-level semi-static signaling, and the value of the signaling indicates the maximum number of data transmission layers on the PDSCH sent by the sending end device to the receiving end device before the next arrival of the signaling. After receiving the data sent by the sending device on an RB pair, the receiving device can determine how many layers of pilot symbols there are at most on the same pilot time-frequency resource in the RB pair through the CodebookSubsetRestriction signaling.

Specifically, if the value of CodebookSubsetRestriction is greater than 4, it means that the number of data transmission layers on the PDSCH of the RB pair is greater than 4, which means that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the RB pair, At this time, the receiving end device can perform channel estimation of the control channel in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair. In this embodiment, the channel estimation method can perform channel estimation of the control channel by combining the pilot symbols received on the resource block where the control channel is located and the pilot symbols received on the resource block where the data channel is located. For example, if the The transmission format of the RB pair is shown in Figure 2, and the receiving device can combine the DMRS symbols received on the 5th, 6th, 12th, and 13th symbols to perform channel estimation of the control channel.

If the value of CodebookSubsetRestriction is less than or equal to 4, it means that the number of data transmission layers on the PDSCH of the RB pair is less than or equal to 4, which means that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the RB pair, At this point, the receiving end device can perform channel estimation of the control channel by using the same pilot time-frequency resource in the resource block pair to perform channel estimation of the control channel. In the RB pair, the pilot symbols received by the resource block where the control channel is located perform the channel estimation of the control channel. Still taking Figure 2 as an example, the receiving end device can combine the DMRS symbols received on the fifth and sixth symbols to perform Channel estimation for the control channel.

It should be noted that this embodiment is based on the assumption that the receiver device can support up to 8 layers of data transmission. Those skilled in the art can also understand that if the receiver device can support more layers of data transmission, then The above embodiment can be used as a reference to analogize similar technical solutions. Moreover, for 8-layer data transmission, other codewords than those in Table 1 can also be used as the orthogonal code, as long as the orthogonality of the DMRS can be guaranteed.

In addition, the receiving end device in this embodiment may be a terminal device such as a mobile phone, and the sending end device may be a network side device such as a base station.

In this embodiment, after the receiver device receives the data sent by the sender device on the RB pair, it can know the number of data transmission layers on the data channel on the RB pair through the codebook subset restriction signaling, so that according to the data The number of transmission layers knows the number of layers of pilot symbols superimposed on the same pilot time-frequency resource in the RB pair, so that the number of layers of pilot symbols is greater than the corresponding method of 2 layers or the number of layers of pilot symbols is greater than The channel estimation of the control channel is performed in a way corresponding to the 4 layers, so that the actual channel can be correctly estimated, and then the correct demodulation of the control channel can be ensured.

In order to solve the above-mentioned problem that the receiving end device cannot correctly estimate the actual channel and thus cannot demodulate the X-PDCCH, the embodiments of the present invention also provide the following solutions.

FIG. 3 is a flow chart of Embodiment 2 of the channel estimation method of the present invention. As shown in FIG. 3, the method of this embodiment may include:

Step 301: Receive the signaling sent by the sending end device, the signaling includes indication information indicating whether the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein the control channel and data The channel shares the resource block pair;

Step 302: Perform channel estimation of the control channel according to the indication information.

Wherein, step 302 may specifically be: if the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2, then use the same pilot symbol in the resource block pair There are more than 2 layers of pilot symbols on the frequency resource to perform channel estimation of the control channel; if the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is less than or equal to 2, Then, the channel estimation of the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

Specifically, in this embodiment, the transmitting end device may send signaling to the receiving end device, and the signaling may be specifically used to indicate to the receiving end device the number of pilot symbols on the same pilot time-frequency resource in the RB pair. Whether the number of layers is greater than 2. After receiving the signaling, the receiving end device can determine whether the number of layers of the pilot symbols on the same pilot time-frequency resource in the RB pair is greater than 2 according to the indication information contained in the signaling, so that according to the indication information, and use the corresponding channel estimation method to perform channel estimation of the control channel.

It should be noted that this embodiment does not limit the specific form of the signaling, nor does it limit the specific form of the indication information included in the signaling, and those skilled in the art can design it as needed. Preferably, the signaling in the foregoing embodiments may be high-level semi-static signaling or physical-layer dynamic signaling.

For the case where the physical layer dynamic signaling is used for the signaling, since the physical layer dynamic signaling can be transmitted in each frame, the same pilot can be indicated in the physical layer dynamic signaling in a timely and accurate manner. Whether the number of layers of pilot symbols on the time-frequency resource is greater than 2. If the number of layers of pilot symbols on the same pilot time-frequency resource in the RBpair indicated at the receiving end is greater than 2, the receiving end device can control the pilot symbols received on the RB pair where the control channel and data channel are located. Channel estimation of the channel, for example, using the 5th, 6th, 12th and 13th symbols shown in Figure 2 above to perform channel estimation of the control channel; if the same pilot frequency in the RB pair at the receiving end is indicated in the dynamic signaling of the physical layer The number of layers of pilot symbols on the frequency resource is less than or equal to 2. Therefore, the receiving end device can combine the pilot symbols received by the resource block where the control channel is located in the RB pair to perform channel estimation of the control channel. Channel estimation of the control channel is performed on the 5th and 6th symbols.

For the case where the high-level semi-static signaling is used for the signaling, since the high-level semi-static signaling has a long sending period, the high-level semi-static signaling may not accurately indicate the same pilot time-frequency in each frame. The number of layers of pilot symbols on the resource, therefore, the high-level semi-static signaling indicates the range of the number of layers of pilot symbols on the same pilot time-frequency resource, such as the maximum number of layers, the receiving end device is receiving After receiving such high-level semi-static signaling, it can be determined that between the arrival time of this high-level semi-static signaling and the arrival time of the next high-level semi-static signaling, the layers of pilot symbols on the same pilot time-frequency resource The number will not exceed the maximum number of layers indicated in the upper layer semi-static signaling. For example, the value of the upper layer semi-static signaling is 0 or 1. When its value is 0, it means that the number of layers of pilot symbols on the same pilot time-frequency resource is less than or equal to 2; when its value is 1, it means that the number of layers of pilot symbols on the same pilot time-frequency resource The maximum value is greater than 2, that is, the number of layers of pilot symbols on the same pilot time-frequency resource may be greater than 2, or may be less than or equal to 2, and vice versa. If the high-level semi-static signaling indicates that the number of layers of pilot symbols on the same pilot time-frequency resource is less than or equal to 2, the pilot symbols on the resource block where the control channel is located can be combined for channel estimation; in LTE, the The pilot symbols on the 5th and 6th symbols on the RB pair where the control channel and data channel are located are used for channel estimation. If the high-level semi-static signaling indicates that the maximum number of layers of pilot symbols on the same pilot time-frequency resource is greater than 2, the pilot symbols on the resource block where the control channel is located and the pilot symbols on the resource block where the data channel is located can be combined. The pilot symbols are used for channel estimation; in LTE, the pilot symbols on the 5th, 6th, 12th, and 13th symbols on the RB pair where the control channel and data channel are located can be used for channel estimation.

With regard to the above-mentioned high-level semi-static signaling and physical layer dynamic signaling, those skilled in the art can use existing high-level semi-static signaling and physical layer dynamic signaling to implement, and details will not be repeated here.

The above-mentioned embodiments of the present invention aim at the situation that the control channel and the data channel share the same RB pair, the receiving end device can receive the signaling sent by the sending end device before performing the channel estimation of the control channel in the RB pair, and through the signaling Indicates whether the number of layers of pilot symbols on the same pilot time-frequency resource contained in the resource block pair is greater than 2. The receiving end device can use the corresponding channel estimation method to perform channel estimation of the control channel, so that it can correctly estimate out of the actual channel, thereby ensuring the correct demodulation of the control channel.

In order to solve the above problem that the receiving end device cannot correctly estimate the actual channel and thus cannot demodulate the control channel, the embodiments of the present invention also provide the following solutions.

FIG. 4 is a flowchart of Embodiment 3 of the channel estimation method of the present invention. As shown in FIG. 4, the method of this embodiment may include:

Step 401, receiving data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair;

Step 402: Perform channel estimation of the control channel in a manner that there are more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

The method in this embodiment can also be directed to the structure of the RB pair shown in FIG. 2 , where the X-PDCCH and the PDSCH share one RB pair for transmission. Compared with the solutions in Embodiment 1 and Embodiment 2 of the channel estimation method shown in FIG. 1 , the method in this embodiment is simpler to implement. In the method of this embodiment, regardless of how many layers of DMRS are superimposed on the same time-frequency resource in the RB pair, the receiving end device all fixedly adopts the DMRS with more than 2 layers of pilot symbols on the same pilot time-frequency resource in the RB pair. channel estimation of the control channel, specifically, in this embodiment, the receiving end can combine the pilot symbols received on the RB pair where the control channel and the data channel are located to perform channel estimation of the control channel, so that the channel estimation of the control channel will not occur. actual channel conditions.

In this embodiment, for the situation that the control channel and the data channel share the same RB pair, when the receiving end device performs channel estimation of the control channel in the RB pair, it fixedly uses the same pilot time-frequency resources in the RB pair. The channel estimation of the control channel is carried out with more than 2 layers of pilot symbols, so that the actual channel can be correctly estimated, and then the correct demodulation of the control channel can be ensured. The solution is simple and reliable, and effectively reduces the complexity of the terminal.

In order to solve the above-mentioned problem that the receiver device cannot estimate the actual channel and thus cannot demodulate the control channel, the embodiments of the present invention also provide the following solutions.

In an embodiment of the data sending method, the sending end device may send signaling to the receiving end device, the signaling includes whether the number of layers of pilot symbols on the same pilot time-frequency resource in the resource block pair is greater than 2 Indication information, wherein the resource block pair is shared by the control channel and the data channel, so that the receiving end device performs channel estimation of the control channel according to the indication information.

Specifically, in this embodiment, the sending end device may send high-layer semi-static signaling or physical layer dynamic signaling including the indication information to the receiving end device. The data sending method in this embodiment is a method executed by the sending end device corresponding to the channel estimation method shown in FIG. 3 , and its implementation principle is similar, so it will not be repeated here.

FIG. 5 is a flowchart of an embodiment of the data sending method of the present invention. As shown in FIG. 5, the method of this embodiment may include:

Step 501, determine whether the layer number N of the data to be transmitted by the data channel to be transmitted is greater than 4, 1≤N≤8;

Step 502, if yes, send M layer data and corresponding M groups of pilot symbols on a resource block pair, where 1≤M≤4, the M layer data refers to the same codeword corresponding to the N layer data The data of the M data layers, the number of layers of the M groups of pilot symbols on the same pilot time-frequency resource is less than or equal to 2 layers, and the resource block pair refers to the resources shared by the data channel and the control channel block pair.

Specifically, this embodiment can optimize the method for sending data by the sender device, and the RB pair used in this embodiment can still refer to the structure shown in FIG. 2 . Before sending downlink data, the sending end device can determine whether the number of transmission layers N of the PDSCH to be sent is greater than 4. If N is greater than 4, it means that the number of DMRS layers superimposed on the same time-frequency resource is greater than 2 layers, and the receiving end The device needs to combine the pilot symbols received on the RB pair where the control channel and data channel are located to perform channel estimation of the control channel, and if N is less than or equal to 4, it means that the number of DMRS layers superimposed on the same time-frequency resource is less than or equal to 2 layers , then the receiver device only needs to combine the pilot symbols received by the resource block where the control channel is located in the RB pair to perform channel estimation of the control channel.

In order to reduce the complexity of the receiver device and avoid the ambiguity of the channel estimation method used by the receiver device for the pilot, the sender device can use the RB-pair shared by the control channel and the data channel when N is greater than 4. The data on the data channel to be sent is split, and only the M layer is sent, that is, only the M layer data and the M layer pilot symbols corresponding to the M layer data are sent.

The above M layer data may correspond to the first codeword, or may correspond to the second codeword. In this embodiment, when sending data, the sending end device can send the data of M data layers and the corresponding M layer DMRS of the first codeword on one RB pair. Since multiple RB pairs can be used when transmitting downlink data, and only one or several RB pairs may share the control channel and data channel, this embodiment can only focus on this one. The RB pair in the shared situation is processed, and for other RB pairs, it can still send N-layer data normally.

It should be noted that if step 501 determines that the number of layers N of the data to be transmitted by the data channel to be transmitted is less than or equal to 4, then the receiving end device can use the pilot symbol received by the resource block where the control channel in the joint RB pair is located. In the manner of channel estimation of the control channel, the channel estimation of the control channel may also be performed by using pilot symbols received on the RB pair where the joint control channel and the data channel are located.

In addition, it should be noted that the above-mentioned method embodiments are only described by taking the transmission of the control channel and the data channel on the same RB pair as an example. However, this embodiment is not limited to the resource form of the RB pair. People can understand that, as long as the control channel and the data channel need to use the same pilot signal for channel estimation resources, the technical solution of the above method embodiment can be used to realize.

In this embodiment, on the RB pair shared by the control channel and the data channel, the maximum number of layers of downlink data sent by the sending device to the receiving device is 4, that is, at most 2 layers of pilot symbols share the same time-frequency resource. Therefore, for the receiving end device, the channel estimation of the control channel can be performed by default using the same pilot time-frequency resource in the RB pair with less than or equal to 2 layers of pilot symbols. Specifically, the receiving end device can jointly The pilot symbol received by the resource block where the control channel is located in the RB pair is used for channel estimation of the control channel, so as to avoid the situation that the receiving end device cannot correctly demodulate the control channel.

FIG. 6 is a schematic structural diagram of Embodiment 1 of the receiving end device of the present invention. As shown in FIG. Receive data sent by the sending end device on a resource block pair, wherein the control channel and the data channel share the resource block pair; the processing module 12 is configured to use the codebook subset restriction signaling if the value of the codebook subset restriction signaling is greater than 4. The channel estimation of the control channel is performed by means of more than 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair; if the value of the codebook subset restriction signaling is less than or equal to 4, the The channel estimation of the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

Specifically, the processing module 12 is specifically configured to combine the pilot symbols and data received by the resource block where the control channel is located when there are more than two layers of pilot symbols on the same pilot time-frequency resource in the resource block pair. The channel estimation of the control channel is performed on the pilot symbols received on the resource block where the channel is located; or; when there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair, the joint Perform channel estimation of the control channel on the pilot symbols received by the resource block where the control channel is located in the resource block pair.

The receiver device in the above-mentioned embodiments of the present invention can be used to execute the method in the method embodiment shown in FIG. 1 , and its implementation principles and technical effects are similar, and will not be repeated here.

FIG. 7 is a schematic structural diagram of Embodiment 2 of the receiving end device of the present invention. As shown in FIG. 7, the receiving end device of this embodiment may include: a signaling receiving module 21 and a channel estimation module 22, wherein the signaling receiving module 21, Used to receive the signaling sent by the sending end device, the signaling includes indication information indicating whether the number of layers of the pilot symbol on the same pilot time-frequency resource in the resource block pair is greater than 2, wherein the control channel and the data channel Sharing the pair of resource blocks; channel estimation module 22, used for if the indication information indicates that the number of layers of pilot symbols on the same pilot time-frequency resource in the pair of resource blocks is greater than 2, then use the layer number of the pilot symbols in the pair of resource blocks The channel estimation of the control channel is performed on the same pilot time-frequency resource on the same pilot time-frequency resource, if the indication information indicates the number of pilot symbols on the same pilot time-frequency resource in the resource block pair If the number of layers is less than or equal to 2, the channel estimation of the control channel is performed in a manner that there are less than or equal to 2 layers of pilot symbols on the same pilot time-frequency resource in the resource block pair.

Specifically, the signaling is high-level semi-static signaling or physical layer dynamic signaling. Correspondingly, the channel estimation module 22 is specifically configured to have more than 2 layers of pilots on the same pilot time-frequency resource in the resource block pair. When the frequency symbol is used, the pilot symbol received on the resource block where the control channel is located and the pilot symbol received on the resource block where the data channel is located are combined to perform channel estimation of the control channel; or; used for pairing the resource block When there are less than or equal to 2 layers of pilot symbols in the same pilot time-frequency resource, the channel estimation of the control channel is performed jointly with the pilot symbols received by the resource block where the control channel is located in the resource block pair.

Corresponding to the receiving end device shown in FIG. 7 above, an embodiment of the present invention further provides a sending end device, including a signaling sending module, configured to send signaling to the receiving end device, and the signaling includes resource block centering Indication information indicating whether the number of layers of pilot symbols on the same pilot time-frequency resource is greater than 2, wherein the control channel and the data channel share the resource block pair, so that the receiving end device performs according to the indication information A channel estimate for the control channel.

The receiver device and the sender device in the above-mentioned embodiments of the present invention can be used to execute the method in the method embodiment shown in FIG. 3 , and the implementation principles and technical effects thereof are similar, and will not be repeated here.

FIG. 8 is a schematic structural diagram of Embodiment 3 of the receiving end device of the present invention. As shown in FIG. 8, the receiving end device of this embodiment may include: a receiving module 31 and a channel estimation module 32, wherein the receiving module 31 is used for The data sent by the sending end device is received on the resource block pair, wherein the control channel and the data channel share the resource block pair; the channel estimation module 32 is configured to use the same pilot time-frequency resource on the resource block pair. The channel estimation of the control channel is performed in a way of more than 2 layers of pilot symbols. Specifically, the channel estimation module 32 is specifically configured to perform channel estimation of the control channel by combining the pilot symbols received on the resource block pairs where the control channel and the data channel are located.

The receiver device in this embodiment can be used to execute the method in the method embodiment shown in FIG. 4 , and its implementation principles and technical effects are similar, and details are not repeated here.

FIG. 9 is a schematic structural diagram of an embodiment of the sending end device of the present invention. As shown in FIG. 9, the sending end device of this embodiment may include: a determining module 41 and a sending module 42, wherein the determining module 41 is used to determine the Whether the number of layers N of the data to be transmitted by the data channel is greater than 4, 1≤N≤8; the sending module 42 is used to determine that the number of layers of the data to be transmitted by the data channel to be transmitted N is greater than 4, Then send M layer data and corresponding M groups of pilot symbols on a resource block pair, where 1≤M≤4, the M layer data refers to the M data layers corresponding to the same codeword in the N layer data data, the number of layers of the M groups of pilot symbols on the same pilot time-frequency resource is less than or equal to 2 layers, and the resource block pair refers to the resource block pair shared by the data channel and the control channel.

The sending end device in this embodiment can be used to execute the method in the method embodiment shown in FIG. 5 , and its implementation principle and technical effect are similar, and details are not repeated here.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (23)

1. a channel estimation methods is characterized in that, comprising:

A Resource Block on the data that send of receiving end/sending end equipment, wherein, control channel and data channel share described Resource Block pair;

If the value of codebook subset limitation signaling greater than 4, then adopts at the identical pilot tone running time-frequency resource of described resource block pair the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign is arranged;

If the value of codebook subset limitation signaling less than or equal to 4, then adopts at the identical pilot tone running time-frequency resource of described resource block pair the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign is arranged.

2. method according to claim 1 is characterized in that, described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite the frequency pilot sign that receives on the Resource Block at frequency pilot sign that the Resource Block at described control channel place receives and data channel place and carry out the channel estimating of described control channel;

Described employing has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

The frequency pilot sign of uniting the Resource Block reception at the described control channel of described resource block pair place carries out the channel estimating of described control channel.

3. method according to claim 1 is characterized in that, described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite described Resource Block and the 5th symbol of upper reception, the 6th symbol, the 12nd symbol and the 13rd symbol are carried out the channel estimating of described control channel;

Described employing has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite the channel estimating of the 5th symbol receiving and the 6th symbol being carried out described control channel at described Resource Block.

4. a channel estimation methods is characterized in that, comprising:

Whether the signaling that receiving end/sending end equipment sends, the number of plies that comprises the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in the described signaling greater than 2 indication information, and wherein, control channel and data channel share described Resource Block pair;

If the number of plies of the frequency pilot sign on the described indication information indexed resource piece Middle Phase pilot tone running time-frequency resource together is greater than 2, then adopting at the identical pilot tone running time-frequency resource of described resource block pair has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign;

If the number of plies of the frequency pilot sign on the described indication information indexed resource piece Middle Phase pilot tone running time-frequency resource together is less than or equal to 2, then adopting at the identical pilot tone running time-frequency resource of described resource block pair has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign.

5. method according to claim 4 is characterized in that, the signaling that described receiving end/sending end equipment sends comprises:

Receive high-rise semi-static signaling or physical layer dynamic signaling that described sending ending equipment sends.

6. according to claim 4 or 5 described methods, it is characterized in that described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite the frequency pilot sign that receives on the Resource Block at frequency pilot sign that the Resource Block at described control channel place receives and data channel place and carry out the channel estimating of described control channel;

Described employing has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

The frequency pilot sign of uniting the Resource Block reception at the described control channel of described resource block pair place carries out the channel estimating of described control channel.

7. according to claim 4 or 5 described methods, it is characterized in that described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite described Resource Block and the 5th symbol of upper reception, the 6th symbol, the 12nd symbol and the 13rd symbol are carried out the channel estimating of described control channel;

Described employing has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite the channel estimating of the 5th symbol receiving and the 6th symbol being carried out described control channel at described Resource Block.

8. a data transmission method for uplink is characterized in that, comprising:

Send signaling to receiving device, whether the number of plies that comprises the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in the described signaling is greater than 2 indication information, wherein, control channel and data channel share described Resource Block pair, so that described receiving device according to described indication information, carries out the channel estimating of described control channel.

9. method according to claim 8 is characterized in that, sends signaling to receiving device, comprising:

Send high-rise semi-static signaling or the physical layer dynamic signaling that comprises described indication information to receiving device.

10. a channel estimation methods is characterized in that, comprising:

A Resource Block on the data that send of receiving end/sending end equipment, wherein, control channel and data channel share described Resource Block pair;

Employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair.

11. method according to claim 10 is characterized in that, described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

The Resource Block of uniting described control channel and data channel place carries out the channel estimating of described control channel to the frequency pilot sign of upper reception.

12. method according to claim 10 is characterized in that, described employing has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign at the identical pilot tone running time-frequency resource of described resource block pair, comprising:

Unite described Resource Block and the 5th symbol of upper reception, the 6th symbol, the 12nd symbol and the 13rd symbol are carried out the channel estimating of described control channel.

13. a data transmission method for uplink is characterized in that, comprising:

Determine that whether the number of plies N of data of the required transmission of data channel to be sent is greater than 4,1≤N≤8;

If, then at a Resource Block M that sends M layer data and correspondence is organized frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in the described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource be less than or equal to 2 layers, and described Resource Block is to the Resource Block that refers to described data channel and described control channel and share pair.

14. method according to claim 13 is characterized in that, is used for the frequency pilot sign of control channel estimation at the Resource Block at described control channel place in the described M group frequency pilot sign.

15. method according to claim 13 is characterized in that, is used for the frequency pilot sign of control channel estimation at the 5th symbol and the 6th symbol of described Resource Block in the described M group frequency pilot sign.

16. a receiving device is characterized in that, comprising:

Data reception module, be used for a Resource Block on the data that send of receiving end/sending end equipment, wherein, control channel and data channel share described Resource Block pair;

Processing module, if the value that is used for the codebook subset limitation signaling greater than 4, then adopting at the identical pilot tone running time-frequency resource of described resource block pair has the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign; If the value of codebook subset limitation signaling less than or equal to 4, then adopts at the identical pilot tone running time-frequency resource of described resource block pair the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign is arranged.

17. receiving device according to claim 16, it is characterized in that, described processing module, concrete being used for when the identical pilot tone running time-frequency resource of described resource block pair has greater than 2 layers of frequency pilot sign, unite the channel estimating that the frequency pilot sign that receives on the Resource Block at frequency pilot sign that the Resource Block at described control channel place receives and data channel place carries out described control channel; Perhaps; Be used for when the identical pilot tone running time-frequency resource of described resource block pair has less than or equal to 2 layers of frequency pilot sign, the frequency pilot sign of uniting the Resource Block reception at the described control channel of described resource block pair place carries out the channel estimating of described control channel.

18. a receiving device is characterized in that, comprising:

The signaling receiver module, be used for the signaling that receiving end/sending end equipment sends, whether the number of plies that comprises the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in the described signaling greater than 2 indication information, and wherein, control channel and data channel share described Resource Block pair;

Channel estimation module, if be used for the number of plies of the frequency pilot sign on the described indication information indexed resource piece Middle Phase pilot tone running time-frequency resource together greater than 2, then adopt at the identical pilot tone running time-frequency resource of described resource block pair the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign is arranged, if the number of plies of the frequency pilot sign on the described indication information indexed resource piece Middle Phase pilot tone running time-frequency resource together is less than or equal to 2, then adopting at the identical pilot tone running time-frequency resource of described resource block pair has the channel estimating of carrying out described control channel less than or equal to the mode of 2 layers of frequency pilot sign.

19. equipment according to claim 18, it is characterized in that, described channel estimation module specifically is used for when the identical pilot tone running time-frequency resource of described resource block pair has greater than 2 layers of frequency pilot sign, unites the channel estimating that the frequency pilot sign that receives on the Resource Block at frequency pilot sign that the Resource Block at described control channel place receives and data channel place carries out described control channel; Perhaps; Be used for when the identical pilot tone running time-frequency resource of described resource block pair has less than or equal to 2 layers of frequency pilot sign, the frequency pilot sign of uniting the Resource Block reception at the described control channel of described resource block pair place carries out the channel estimating of described control channel.

20. a sending ending equipment is characterized in that, comprising:

Signaling sending module, be used for sending signaling to receiving device, whether the number of plies that comprises the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in the described signaling is greater than 2 indication information, wherein, control channel and data channel share described Resource Block pair, so that described receiving device according to described indication information, carries out the channel estimating of described control channel.

21. a receiving device is characterized in that, comprising:

Receiver module, be used for a Resource Block on the data that send of receiving end/sending end equipment, wherein, control channel and data channel share described Resource Block pair;

Channel estimation module is used for adopting at the identical pilot tone running time-frequency resource of described resource block pair the channel estimating of carrying out described control channel greater than the mode of 2 layers of frequency pilot sign being arranged.

22. equipment according to claim 21 is characterized in that, described channel estimation module specifically carries out the channel estimating of described control channel to the frequency pilot sign of upper reception for the Resource Block of uniting described control channel and data channel place.

23. a sending ending equipment is characterized in that, comprising:

Determination module be used for to determine that whether the number of plies N of data of the required transmission of data channel to be sent is greater than 4,1≤N≤8;

Sending module, determine that the number of plies N of data of the required transmission of data channel to be sent is greater than 4 if be used for described determination module, then at a Resource Block M that sends M layer data and correspondence is organized frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in the described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource be less than or equal to 2 layers, and described Resource Block is to the Resource Block that refers to described data channel and described control channel and share pair.

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