CN107277822B - Signal transmission method and network equipment - Google Patents

Abstract

The present invention discloses a signal transmission method and network equipment, wherein the method includes: selecting K physical resource blocks (PRBs) included in a sub-band; wherein, the K is an integer greater than or equal to 1, and the K physical resources Blocks are PRBs that are continuous in the frequency domain; M 32-port CSI-RS signals are mapped to the K PRBs and the CSI-RS signals are transmitted; wherein M is an integer less than or equal to K and greater than or equal to 1 .

Description

A kind of signal transmission method and network equipment

technical field

The present invention relates to a signal processing technology in the communication field, in particular to a signal transmission method and a network device.

Background technique

Currently, the following two CSI-RS transmission modes are proposed in the protocol: First, the user equipment UE feeds back a CSI measurement report based on the measurement of the uncoded CSI-RS. Second, the user equipment feeds back the RI measurement report based on the measurement of the uncoded CSI-RS. In either scheme, the uncoded CSI-RS transmission period is longer, so its overhead is not a problem, but since it needs to accurately estimate and cover the user equipment located at the edge of the coverage area, its coverage performance is required to be good.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a signal transmission method and a network device, which can at least solve the above problems existing in the prior art.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

An embodiment of the present invention provides a signal transmission method, and the method includes:

Select K physical resource block PRBs included in the subband; wherein, the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

M 32-port CSI-RS signals are mapped to the K PRBs and the CSI-RS signals are transmitted; wherein M is an integer less than or equal to K and greater than or equal to 1.

An embodiment of the present invention provides a network device, including:

A resource selection unit, configured to select K physical resource blocks PRBs included in the subband; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

A signal processing unit, configured to map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1.

Embodiments of the present invention provide a signal transmission method and network device, which can select continuous physical resource blocks from each sub-band, map M 32-port CSI-RS signals to the selected physical resource blocks and transmit them. In this way, the 32-port CSI-RS signals can be transmitted from consecutive physical resource blocks in the sub-band, so that the density thereof is high, thereby ensuring the coverage performance of the 32-port CSI-RS signals.

Description of drawings

1 is a schematic flowchart of a signal transmission method according to an embodiment of the present invention;

2 is a schematic diagram 1 of a symbol style selected in an embodiment of the present invention;

3 is a schematic diagram 2 of a symbol style selected in an embodiment of the present invention;

4 is a schematic diagram three of the symbol styles selected in the embodiment of the present invention;

5 is a schematic diagram 4 of a symbol style selected in an embodiment of the present invention;

FIG. 6 is a schematic diagram of a composition structure of a network device according to an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1.

An embodiment of the present invention provides a signal transmission method, as shown in FIG. 1 , including:

Step 101: Select K physical resource block PRBs included in the sub-band; wherein, the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

Step 102 : Map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1.

The specific operation mode of this embodiment is as follows:

The K physical resource blocks PRB included in the selected sub-band also include:

Select the second time slot of each PRB from the K physical resource blocks (PRBs, Physical Resource Blocks) included in the sub-band; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are in the frequency domain Continuous PRBs;: two target symbols at preset time domain positions are selected from the second time slot of each PRB;

The mapping of M 32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes: mapping M 32-port CSI-RS signals to the K PRBs The CSI-RS signal is concurrently transmitted in the two target symbols; wherein, M is an integer less than or equal to K and greater than or equal to 1.

In this embodiment, subsequent descriptions are made according to the definition of subband size in Table 7.2.1-5 of TS36.213. Among them, the table (Table) 7.2.1-5 can refer to Table 1:

Table 1

Preferably, the preset time domain position in this embodiment may be a preset position according to an actual situation. For example, the second and third symbol positions in the time domain may be selected as the preset time domain position.

In addition, this embodiment specifically provides a method for determining the number of M, including:

Based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined.

Further, this embodiment uses the following three examples to describe the operation of determining M in detail:

Example one,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is two, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is one, wherein the first threshold range may be greater than or equal to eight and less than or equal to twenty-six.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if it needs to carry 32-port CSI-RS signals, at least 32 REs are required.

Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, in conjunction with FIG. 2 and Table 1, the system bandwidth (System bandwidth): 8-26, a certain subband (subband) includes 2 PRBs: PRB x, PRB x+1, which are carried and transmitted in the 2 PRBs The location pattern of a 32port CSI-RS can be selected as part of REs in each PRB. In addition, the above pattern is only an example, in fact, all REs in a certain PRB can be selected, and then some REs in another PRB that are continuous with the previous PRB can be selected as long as they can be 16 consecutive sub-subs in the frequency domain carrier wave.

Example two,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each subband is three, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is two, wherein the second threshold range may be greater than or equal to twenty-seven and less than or equal to sixty-three.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, referring to Fig. 3 and Table 1 for description, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 3 PRBs: 4 PRBs: PRB x, PRB x+1, PRB x+2 , the location pattern of the two 32-port CSI-RSs carried and transmitted in the three PRBs may be as shown in FIG. 3 .

Example three,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the third threshold range and the number of PRBs included in each subband is four, determine the number of CSI-RS signals of 32 ports that can be transmitted in the K PRBs The number M is three, wherein the third threshold range may be greater than or equal to sixty-four and less than or equal to 110.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, in conjunction with FIG. 4 and Table 1, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 4 PRBs: PRB x, PRB x+1, PRB x+2, PRB x+ 3. The location pattern of the three 32-port CSI-RSs carried and transmitted in the four PRBs may be as shown in FIG. 4 .

The densities that can be achieved after determining the resource locations for mapping CSI-RS signals in the above three examples are described below:

In example 1, System bandwith==8-26RBs, Subband size k==2RBs: 2 PRBs of a Subband include a complete 32port CSI-RS, and the density is 0.5RE/port/PRB.

In Example 2, System bandwith==27-63RBs, Subband size k==3RBs: 3 PRBs of a Subband include 2 complete 32port CSI-RSs, and the density is 0.67RE/port/PRB.

In Example 3, System bandwith==64-110RBs, Subband size k==4RBs: 4 PRBs of a Subband include 3 complete 32port CSI-RSs, and the density is 0.75RE/port/PRB.

It can be seen that by adopting the above scheme, continuous physical resource blocks can be selected from each sub-band, and M CSI-RS signals of 32 ports can be mapped to the selected physical resource blocks and transmitted. In this way, the 32-port CSI-RS signals can be transmitted from consecutive physical resource blocks in the sub-band, so that the density thereof is high, thereby ensuring the coverage performance of the 32-port CSI-RS signals.

Specifically, the second time slot can be selected from the physical resource block corresponding to each subband, and two target symbols can be selected from the second time slot, and finally M 32-port CSI-RS signals can be mapped to the selected target symbol and transmit. In this way, it is possible to select from nearly 40 resource elements in the second time slot of each physical resource block, and map the M CSI-RS signals to the selected resource elements, so that the density is high, thereby ensuring a high density. Coverage performance of 32-port CSI-RS signals.

Embodiment two,

An embodiment of the present invention provides a signal transmission method, as shown in FIG. 1 , including:

Step 101: Select K physical resource block PRBs included in the sub-band; wherein, the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

Step 102 : Map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1.

The specific operation mode of this embodiment is as follows:

The K physical resource blocks PRB included in the selected sub-band also include:

Select the second time slot of each PRB from the K physical resource blocks (PRBs, Physical Resource Blocks) included in the sub-band; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are in the frequency domain Continuous PRBs;: two target symbols at preset time domain positions are selected from the second time slot of each PRB;

The mapping of M 32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes: mapping M 32-port CSI-RS signals to the K PRBs The CSI-RS signal is concurrently transmitted in the two target symbols; wherein, M is an integer less than or equal to K and greater than or equal to 1.

In this embodiment, subsequent descriptions are made according to the definition of subband size in Table 7.2.1-3 of TS36.213. Among them, the table (Table) 7.2.1-3 can refer to Table 2:

Table 2

Preferably, the preset time domain position in this embodiment may be a preset position according to the actual situation. For example, referring to FIG. 5 , the second and third symbol positions in the time domain may be selected as the preset time domain positions. Location.

In addition, this embodiment specifically provides a method for determining the number of M, including:

Based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined.

Further, in this embodiment, the operation of determining M is described in detail with the following three examples in combination with the above Table 2:

Example one,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each subband is four, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is three, wherein the first threshold range may be greater than or equal to eight and less than or equal to twenty-six.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to the bandwidth of each sub-band, it can be determined under the transmission mode scenario defined in Table 2 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if it needs to carry 32-port CSI-RS signals, at least 32 REs are required.

Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, System bandwidth: 8-26, a certain subband (subband) includes 4RBs: 4 PRBs of a Subband include 3 complete 32port CSI-RSs, and the density is 0.75RE/port/PRB.

Example two,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each subband is three, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is two, wherein the second threshold range may be greater than or equal to twenty-seven and less than or equal to sixty-three.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 6 PRBs including 4 complete 32port CSI-RS, and the density is 0.67RE/port/PRB.

Example three,

The number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, including:

When the number of PRBs corresponding to the system bandwidth is within the third threshold range and the number of PRBs included in each subband is four, determine the number of CSI-RS signals of 32 ports that can be transmitted in the K PRBs The number M is three, wherein the third threshold range may be greater than or equal to sixty-four and less than or equal to 110.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, System bandwidth: 27-63, a certain subband (subband) includes 8 PRBs of one Subband including 6 complete 32port CSI-RS, and the density is 0.75RE/port/PRB.

It can be seen that by adopting the above scheme, continuous physical resource blocks can be selected from each sub-band, and M CSI-RS signals of 32 ports can be mapped to the selected physical resource blocks and transmitted. In this way, the 32-port CSI-RS signals can be transmitted from consecutive physical resource blocks in the sub-band, so that the density thereof is high, thereby ensuring the coverage performance of the 32-port CSI-RS signals.

Embodiment three,

An embodiment of the present invention provides a network device, as shown in FIG. 6 , including:

A resource selection unit 61, configured to select K physical resource blocks PRBs included in the subband; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

The signal processing unit 62 is configured to map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1.

A resource selection unit, configured to select the second time slot of each PRB from the K physical resource blocks PRB included in the sub-band; from the second time slot of each PRB, two preset time domain positions are obtained by selecting target symbol;

Correspondingly, the signal processing unit is configured to map the M 32-port CSI-RS signals to the two target symbols of the K PRBs and transmit the CSI-RS signals; where M is less than An integer equal to K and greater than or equal to 1.

In this embodiment, subsequent descriptions are made according to the definition of subband size in Table 7.2.1-5 of TS36.213. Among them, the table (Table) 7.2.1-5 can refer to Table 1:

Table 1

Preferably, the preset time domain position in this embodiment may be a preset position according to an actual situation. For example, the second and third symbol positions in the time domain may be selected as the preset time domain position.

In addition, this embodiment specifically provides a method for determining the number of M, as follows:

The signal processing unit is configured to determine, based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs.

Further, this embodiment uses the following three examples to describe the operation of determining M in detail:

Example one,

A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is two The number M of the CSI-RS signals is one, wherein the first threshold range may be greater than or equal to eight and less than or equal to twenty-six.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if it needs to carry 32-port CSI-RS signals, at least 32 REs are required.

Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, in conjunction with FIG. 2 and Table 1, the system bandwidth (System bandwidth): 8-26, a certain subband (subband) includes 2 PRBs: PRB x, PRB x+1, which are carried and transmitted in the 2 PRBs The location pattern of a 32port CSI-RS can be selected as part of REs in each PRB. In addition, the above pattern is only an example, in fact, all REs in a certain PRB can be selected, and then some REs in another PRB that are continuous with the previous PRB can be selected as long as they can be 16 consecutive sub-subs in the frequency domain carrier wave.

Example two,

A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each sub-band is three The number M of the CSI-RS signals is two, wherein the second threshold range may be greater than or equal to twenty-seven and less than or equal to sixty-three.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, referring to Fig. 3 and Table 1 for description, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 3 PRBs: 4 PRBs: PRB x, PRB x+1, PRB x+2 , the location pattern of the two 32-port CSI-RSs carried and transmitted in the three PRBs may be as shown in FIG. 3 .

Example three,

A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each sub-band is four The number M of the CSI-RS signals is three, and the third threshold range may be greater than or equal to sixty-four and less than or equal to 110.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, in conjunction with FIG. 4 and Table 1, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 4 PRBs: PRB x, PRB x+1, PRB x+2, PRB x+ 3. The location pattern of the three 32-port CSI-RSs carried and transmitted in the four PRBs may be as shown in FIG. 4 .

The densities that can be achieved after determining the resource locations for mapping CSI-RS signals in the above three examples are described below:

In example 1, System bandwith==8-26RBs, Subband size k==2RBs: 2 PRBs of a Subband include a complete 32port CSI-RS, and the density is 0.5RE/port/PRB.

In Example 2, System bandwith==27-63RBs, Subband size k==3RBs: 3 PRBs of a Subband include 2 complete 32port CSI-RSs, and the density is 0.67RE/port/PRB.

In Example 3, System bandwith==64-110RBs, Subband size k==4RBs: 4 PRBs of a Subband include 3 complete 32port CSI-RSs, and the density is 0.75RE/port/PRB.

It can be seen that by adopting the above scheme, continuous physical resource blocks can be selected from each sub-band, and M CSI-RS signals of 32 ports can be mapped to the selected physical resource blocks and transmitted. In this way, the 32-port CSI-RS signals can be transmitted from consecutive physical resource blocks in the sub-band, so that the density thereof is high, thereby ensuring the coverage performance of the 32-port CSI-RS signals.

Embodiment four,

An embodiment of the present invention provides a network device, as shown in FIG. 6 , including:

A resource selection unit 61, configured to select K physical resource blocks PRBs included in the subband; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain;

The signal processing unit 62 is configured to map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1.

The resource selection unit 61 is used to select the second time slot of each PRB from the K physical resource blocks PRB included in the sub-band; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are in the frequency domain continuous PRBs; two target symbols of preset time domain positions are selected from the second time slot of each PRB;

A signal processing unit 62, configured to map M 32-port CSI-RS signals to the two target symbols of the K PRBs and transmit the CSI-RS signals; wherein M is less than or equal to K, and Integer greater than or equal to 1.

In this embodiment, subsequent descriptions are made according to the definition of subband size in Table 7.2.1-3 of TS36.213. Among them, the table (Table) 7.2.1-3 can refer to Table 2:

Table 2

Preferably, the preset time domain position in this embodiment may be a preset position according to the actual situation. For example, referring to FIG. 5 , the second and third symbol positions in the time domain may be selected as the preset time domain positions. Location.

In addition, this embodiment specifically provides a method for determining the number of M, as follows:

The signal processing unit 62 is configured to determine, based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs.

Further, in this embodiment, the operation of determining M is described in detail with the following three examples in combination with the above Table 2:

Example one,

The signal processing unit 62 is configured to determine that the K PRBs can be transmitted when the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is four The number M of the 32-port CSI-RS signals is three, wherein the first threshold range may be greater than or equal to eight and less than or equal to twenty-six.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to the bandwidth of each sub-band, it can be determined under the transmission mode scenario defined in Table 2 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if it needs to carry 32-port CSI-RS signals, at least 32 REs are required.

Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, System bandwidth: 8-26, a certain subband (subband) includes 4RBs: 4 PRBs of a Subband include 3 complete 32port CSI-RSs, and the density is 0.75RE/port/PRB.

Example two,

The signal processing unit 62 is configured to determine that the K PRBs can be transmitted when the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each sub-band is three The number M of the 32-port CSI-RS signals is two, wherein the second threshold range may be greater than or equal to twenty-seven and less than or equal to sixty-three.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, the system bandwidth (System bandwidth): 27-63, a certain subband (subband) includes 6 PRBs including 4 complete 32port CSI-RS, and the density is 0.67RE/port/PRB.

Example three,

The signal processing unit 62 is configured to determine that the K PRBs can be transmitted when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each sub-band is four The number M of the 32-port CSI-RS signals is three, wherein the third threshold range may be greater than or equal to sixty-four and less than or equal to 110.

Based on the number of PRBs corresponding to the system bandwidth and the number of PRBs corresponding to each sub-band bandwidth, it can be determined in the transmission mode scenario defined in Table 1 above in the protocol corresponding to this example; further, based on the number of PRBs included in each sub-band The number can determine M.

It should be understood that each PRB can contain 7*12 resource elements (RE, Resource Element), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, each RE corresponds to 1 time-domain symbol and 1 frequency-domain subcarrier; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two consecutive symbols in the time domain are selected from each PRB in this embodiment, that is to say, REs with at least 16 subcarriers selected in the frequency domain can carry a 32-port CSI-RS signal.

For example, System bandwidth: 27-63, a certain subband (subband) includes 8 PRBs of one Subband including 6 complete 32port CSI-RS, and the density is 0.75RE/port/PRB.

It can be seen that by adopting the above scheme, continuous physical resource blocks can be selected from each sub-band, and M CSI-RS signals of 32 ports can be mapped to the selected physical resource blocks and transmitted. In this way, the 32-port CSI-RS signals can be transmitted from consecutive physical resource blocks in the sub-band, so that the density thereof is relatively high, thereby ensuring the coverage performance of the 32-port CSI-RS signals.

If the integrated modules described in the embodiments of the present invention are implemented in the form of software function modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a network device, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes . As such, embodiments of the present invention are not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (16)

1. A signal transmission method, characterized in that the method comprises: Select K physical resource block PRBs included in the subband; wherein, the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain; Mapping the M 32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1; Wherein, the K PRBs included in the selected sub-band include: Select the second time slot of each PRB from the K PRBs included in the subband; Two target symbols at preset time domain positions are selected from the second time slot of each PRB; Correspondingly, the mapping of M 32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes: M 32-port CSI-RS signals are mapped to the two target symbols of the K PRBs, and the CSI-RS signals are transmitted; wherein M is an integer less than or equal to K and greater than or equal to 1. 2. The method according to claim 1, wherein the mapping of the M 32-port CSI-RS signals to the two target symbols at the preset positions in the K PRBs comprises: Based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs is determined. 3. The method according to claim 2, wherein the number K of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band is determined to determine the 32 ports that can be transmitted in the K PRBs The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is two, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is one, wherein the first threshold range is greater than or equal to eight and less than or equal to twenty-six. 4. The method according to claim 2, wherein, based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band, determine the 32 ports that can be transmitted in the K PRBs The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each subband is three, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is two, wherein the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three. 5. The method according to claim 2, characterized in that, the 32 ports that can be transmitted in the K PRBs are determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the third threshold range and the number of PRBs included in each subband is four, determine the number of CSI-RS signals of 32 ports that can be transmitted in the K PRBs The number M is three, wherein the third threshold range is greater than or equal to sixty-four and less than or equal to 110. 6. The method according to claim 2, characterized in that, the 32 ports that can be transmitted in the K PRBs are determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each subband is four, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is three, wherein the first threshold range is greater than or equal to eight and less than or equal to twenty-six. 7. The method according to claim 2, wherein the 32 ports that can be transmitted in the K PRBs are determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each subband is six, determine the 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is three, wherein the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three. 8. The method according to claim 2, characterized in that, the 32 ports that can be transmitted in the K PRBs are determined based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each sub-band The number M of CSI-RS signals, including: When the number of PRBs corresponding to the system bandwidth is within the third threshold range and the number of PRBs included in each subband is six, determine the number of 32-port CSI-RS signals that can be transmitted in the K PRBs The number M is four, wherein the third threshold range is greater than or equal to sixty-four and less than or equal to 110. 9. A network device, comprising: A resource selection unit, configured to select K physical resource blocks PRBs included in the subband; wherein, K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs that are continuous in the frequency domain; a signal processing unit, configured to map M 32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer less than or equal to K and greater than or equal to 1; The resource selection unit is further configured to select the second time slot of each PRB from the K PRBs included in the sub-band; from the second time slot of each PRB, two preset time domain positions are selected. target symbol; Correspondingly, the signal processing unit is further configured to map M 32-port CSI-RS signals to the two target symbols of the K PRBs and transmit the CSI-RS signals; where M is An integer less than or equal to K and greater than or equal to 1. 10. The network device according to claim 9, wherein, The signal processing unit is configured to determine, based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband, the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs. 11. The network device according to claim 10, wherein, A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is two The number M of the CSI-RS signals is one, wherein the first threshold range is greater than or equal to eight and less than or equal to twenty-six. 12. The network device according to claim 10, wherein, A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each sub-band is three The number M of the CSI-RS signals is two, wherein the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three. 13. The network device according to claim 10, wherein, A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each sub-band is four The number M of CSI-RS signals is three, wherein the third threshold range is greater than or equal to sixty-four and less than or equal to 110. 14. The network device according to claim 10, wherein, A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within the first threshold range and the number of PRBs included in each sub-band is four The number M of the CSI-RS signals is three, wherein the first threshold range is greater than or equal to eight and less than or equal to twenty-six. 15. The network device according to claim 10, wherein, The signal processing unit is configured to determine, when the number of PRBs corresponding to the system bandwidth is within the second threshold range and the number of PRBs included in each sub-band is six, to determine the number of 32 of the K PRBs that can be transmitted The number M of CSI-RS signals of the port is three, wherein the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three. 16. The network device according to claim 10, wherein, A signal processing unit, configured to determine the 32 ports that can be transmitted in the K PRBs when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each sub-band is six The number M of the CSI-RS signals is four, wherein the third threshold range is greater than or equal to sixty-four and less than or equal to 110.

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