CN107277822B - Signal transmission method and network equipment - Google Patents
Signal transmission method and network equipment Download PDFInfo
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- CN107277822B CN107277822B CN201610213086.5A CN201610213086A CN107277822B CN 107277822 B CN107277822 B CN 107277822B CN 201610213086 A CN201610213086 A CN 201610213086A CN 107277822 B CN107277822 B CN 107277822B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The invention discloses a signal transmission method and network equipment, wherein the method comprises the following steps: selecting K Physical Resource Blocks (PRBs) contained in the sub-bands; the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain; mapping M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
Description
Technical Field
The present invention relates to signal processing technologies in the field of communications, and in particular, to a signal transmission method and a network device.
Background
Currently, the following two CSI-RS transmission schemes are proposed in the protocol: first, the user equipment UE feeds back a CSI measurement report based on a measurement on an uncoded CSI-RS. Second, the user equipment feeds back RI measurement reports based on measurements on the uncoded CSI-RS. In either scheme, the uncoded CSI-RS transmission period is long, so its overhead is not an issue, but it is required that its coverage performance is good since it needs to be accurately estimated and covered to the user equipments located at the edge of the coverage area.
Disclosure of Invention
In view of the above, the present invention provides a signal transmission method and a network device, which can solve at least the above problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a signal transmission method, which comprises the following steps:
selecting K physical resource blocks PRB contained in a sub-frequency band; the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
mapping M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
An embodiment of the present invention provides a network device, including:
the resource selection unit is used for selecting K physical resource blocks PRB contained in the sub-frequency band; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
a signal processing unit, configured to map M32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The embodiment of the invention provides a signal transmission method and network equipment, which can select continuous physical resource blocks from each sub-band, map M32-port CSI-RS signals to the selected physical resource blocks and transmit the signals. Therefore, the 32-port CSI-RS signals can be transmitted from the continuous physical resource blocks in the sub-frequency band, the density of the signals is high, and the coverage performance of the 32-port CSI-RS signals is guaranteed.
Drawings
FIG. 1 is a schematic flow chart illustrating a signal transmission method according to an embodiment of the present invention;
FIG. 2 is a first diagram illustrating a selected symbol pattern according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a second exemplary embodiment of a selected symbol pattern;
FIG. 4 is a third schematic diagram of a selected symbol pattern according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a fourth exemplary embodiment of a selected symbol pattern;
fig. 6 is a schematic diagram of a network device structure according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The first embodiment,
An embodiment of the present invention provides a signal transmission method, as shown in fig. 1, including:
step 101: selecting K physical resource blocks PRB contained in a sub-frequency band; the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
step 102: mapping M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The specific operation mode of this embodiment is as follows:
the selecting K physical resource blocks PRB included in the sub-band further includes:
selecting a second time slot of each Physical Resource Block (PRB) from K PRBs contained in the sub-band; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain; : selecting two target symbols of a preset time domain position from the second time slot of each PRB;
the mapping the M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes: mapping M32-port CSI-RS signals into the two target symbols of the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
This example will be described later with reference to the definition of subband sizes (subbands sizes) in TS36.213 Table (Table)7.2.1 to 5. Wherein said Table (Table)7.2.1-5 can be seen in Table 1:
TABLE 1
Preferably, the preset time domain position in this embodiment may be a position preset according to an actual situation, for example, the position located at the 2 nd and 3 rd symbol positions in the time domain may be selected as the preset time domain position.
In addition, the embodiment specifically provides a manner of determining the number of M, including:
and determining the number M of 32-port CSI-RS signals capable of being transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs contained in each sub-band.
Further, the present embodiment performs detailed description of the operation of determining M with the following three examples:
examples one,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is two, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is one, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; at least 32 REs are required if a 32-port CSI-RS signal needs to be carried.
Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, as described with reference to fig. 2 and table 1, the System bandwidth (System bandwidth):8-26, a certain sub-band (subband) includes 2 PRBs, PRB x and PRB x +1, and the position pattern of a 32-port CSI-RS carried and transmitted in the 2 PRBs may be to select a partial RE in each PRB. In addition, the above pattern is only an example, and actually, all REs in one PRB may be selected, and then a part of REs in another PRB that are consecutive to the previous PRB may be selected as long as 16 consecutive subcarriers in the frequency domain.
Examples two,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is three, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, referring to fig. 3 and table 1, System bandwidth (System bandwidth):27-63, one sub-band (subband) includes 3 PRBs: 4 PRBs: PRB x, PRB x +1, PRB x +2, and the position pattern of 2 32-port CSI-RSs carried and transmitted in the 3 PRBs can be as shown in fig. 3.
Examples III,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, referring to fig. 4 and table 1, System bandwidth (System bandwidth):27-63, one sub-band (subband) includes 4 PRBs, PRB x +1, PRB x +2, and PRB x +3, and the position pattern of 3 32-port CSI-RSs carried and transmitted in the 4 PRBs can be as shown in fig. 4.
The following describes the density that can be achieved after determining the resource location for mapping the CSI-RS signals according to the above three examples:
in one example, the System bandwidth is 8-26RBs, and the sub size k is 2RBs, where 2 PRBs of one sub include one complete 32port CSI-RS, and the density is 0.5 RE/port/PRB.
In example two, the System bandwidth is 27-63RBs, and the sub size k is 3RBs, and 3 PRBs of one sub include 2 complete 32port CSI-RS, and the density is 0.67 RE/port/PRB.
In the example three, the System bandwidth is 64-110RBs, and the sub band size k is 4RBs, wherein 4 PRBs of one sub band contain 3 complete 32port CSI-RS, and the density is 0.75 RE/port/PRB.
Therefore, by adopting the scheme, continuous physical resource blocks can be selected from each sub-band, and the M32-port CSI-RS signals are mapped to the selected physical resource blocks and transmitted. Therefore, the 32-port CSI-RS signals can be transmitted from the continuous physical resource blocks in the sub-frequency band, the density of the signals is high, and the coverage performance of the 32-port CSI-RS signals is guaranteed.
Specifically, a second slot can be selected from the physical resource blocks corresponding to each sub-band, two target symbols can be selected from the second slot, and finally, the CSI-RS signals of the M32 ports are mapped to the selected target symbols and transmitted. Therefore, approximately 40 resource elements can be selected from the second time slot of each physical resource block, and the density of the M CSI-RS signals is higher after the M CSI-RS signals are mapped to the selected resource elements, so that the coverage performance of the CSI-RS signals of the 32 ports is ensured.
Example II,
An embodiment of the present invention provides a signal transmission method, as shown in fig. 1, including:
step 101: selecting K physical resource blocks PRB contained in a sub-frequency band; the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
step 102: mapping M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The specific operation mode of this embodiment is as follows:
the selecting K physical resource blocks PRB included in the sub-band further includes:
selecting a second time slot of each Physical Resource Block (PRB) from K PRBs contained in the sub-band; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain; : selecting two target symbols of a preset time domain position from the second time slot of each PRB;
the mapping the M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes: mapping M32-port CSI-RS signals into the two target symbols of the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The present example will be described later with reference to the definition of subband sizes (subbands sizes) in TS36.213 Table (Table)7.2.1 to 3. Wherein said Table (Table)7.2.1-3 can be seen in Table 2:
TABLE 2
Preferably, the preset time domain position in this embodiment may be a position preset according to an actual situation, for example, referring to fig. 5, the position located at the 2 nd and 3 rd symbol positions in the time domain may be selected as the preset time domain position.
In addition, the embodiment specifically provides a manner of determining the number of M, including:
and determining the number M of 32-port CSI-RS signals capable of being transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs contained in each sub-band.
Further, the present embodiment performs a detailed description of the operation of determining M in the following three examples in conjunction with the above table 2:
examples one,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is four, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three, where 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 may be determined that the transmission mode scenario defined in table 2 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; at least 32 REs are required if a 32-port CSI-RS signal needs to be carried.
Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, the System bandwidth (System bandwidth) is 8-26, a certain sub-band (Subband) comprises 4RBs, and 4 PRBs of one Subband comprise 3 complete 32port CSI-RSs and the density is 0.75 RE/port/PRB.
Examples two,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is three, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, the System bandwidth (System bandwidth) is 27-63, and a certain sub-band (subband) comprises 4 complete 32port CSI-RSs in 6 PRBs, and the density is 0.67 RE/port/PRB.
Examples III,
The determining, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs includes:
when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
27-63 of System bandwidth (System bandwidth), 6 complete 32port CSI-RSs in 8 PRBs of a certain sub-band (sub-band) comprising one sub-band, and the density is 0.75 RE/port/PRB.
Therefore, by adopting the scheme, continuous physical resource blocks can be selected from each sub-band, and the M32-port CSI-RS signals are mapped to the selected physical resource blocks and transmitted. Therefore, the 32-port CSI-RS signals can be transmitted from the continuous physical resource blocks in the sub-frequency band, the density of the signals is high, and the coverage performance of the 32-port CSI-RS signals is guaranteed.
Example III,
An embodiment of the present invention provides a network device, as shown in fig. 6, including:
a resource selecting unit 61, configured to select K physical resource blocks PRB included in the subband; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
a signal processing unit 62, configured to map M32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The resource selection unit is used for selecting a second time slot of each PRB from K Physical Resource Blocks (PRBs) contained in the sub-band; selecting two target symbols of a preset time domain position from the second time slot of each PRB;
correspondingly, the signal processing unit is configured to map M32-port CSI-RS signals into the two target symbols of the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
This example will be described later with reference to the definition of subband sizes (subbands sizes) in TS36.213 Table (Table)7.2.1 to 5. Wherein said Table (Table)7.2.1-5 can be seen in Table 1:
TABLE 1
Preferably, the preset time domain position in this embodiment may be a position preset according to an actual situation, for example, the position located at the 2 nd and 3 rd symbol positions in the time domain may be selected as the preset time domain position.
In addition, the present embodiment specifically provides a way to determine the number of M, as follows:
and the signal processing unit is used for determining the number M of the CSI-RS signals of 32 ports capable of being transmitted in the K PRBs based on the number of the PRBs corresponding to the system bandwidth and the number K of the PRBs contained in each sub-band.
Further, the present embodiment performs detailed description of the operation of determining M with the following three examples:
examples one,
The signal processing unit is configured to determine, when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is two, that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is one, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; at least 32 REs are required if a 32-port CSI-RS signal needs to be carried.
Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, as described with reference to fig. 2 and table 1, the System bandwidth (System bandwidth):8-26, a certain sub-band (subband) includes 2 PRBs, PRB x and PRB x +1, and the position pattern of a 32-port CSI-RS carried and transmitted in the 2 PRBs may be to select a partial RE in each PRB. In addition, the above pattern is only an example, and actually, all REs in one PRB may be selected, and then a part of REs in another PRB that are consecutive to the previous PRB may be selected as long as 16 consecutive subcarriers in the frequency domain.
Examples two,
And a signal processing unit, configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is three, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, referring to fig. 3 and table 1, System bandwidth (System bandwidth):27-63, one sub-band (subband) includes 3 PRBs: 4 PRBs: PRB x, PRB x +1, PRB x +2, and the position pattern of 2 32-port CSI-RSs carried and transmitted in the 3 PRBs can be as shown in fig. 3.
Examples III,
And a signal processing unit, configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, referring to fig. 4 and table 1, System bandwidth (System bandwidth):27-63, one sub-band (subband) includes 4 PRBs, PRB x +1, PRB x +2, and PRB x +3, and the position pattern of 3 32-port CSI-RSs carried and transmitted in the 4 PRBs can be as shown in fig. 4.
The following describes the density that can be achieved after determining the resource location for mapping the CSI-RS signals according to the above three examples:
in one example, the System bandwidth is 8-26RBs, and the sub size k is 2RBs, where 2 PRBs of one sub include one complete 32port CSI-RS, and the density is 0.5 RE/port/PRB.
In example two, the System bandwidth is 27-63RBs, and the sub size k is 3RBs, and 3 PRBs of one sub include 2 complete 32port CSI-RS, and the density is 0.67 RE/port/PRB.
In the example three, the System bandwidth is 64-110RBs, and the sub band size k is 4RBs, wherein 4 PRBs of one sub band contain 3 complete 32port CSI-RS, and the density is 0.75 RE/port/PRB.
Therefore, by adopting the scheme, continuous physical resource blocks can be selected from each sub-band, and the M32-port CSI-RS signals are mapped to the selected physical resource blocks and transmitted. Therefore, the 32-port CSI-RS signals can be transmitted from the continuous physical resource blocks in the sub-frequency band, the density of the signals is high, and the coverage performance of the 32-port CSI-RS signals is guaranteed.
Example four,
An embodiment of the present invention provides a network device, as shown in fig. 6, including:
a resource selecting unit 61, configured to select K physical resource blocks PRB included in the subband; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
a signal processing unit 62, configured to map M32-port CSI-RS signals to the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
A resource selecting unit 61, configured to select a second slot of each PRB from K physical resource blocks PRB included in the subband; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain; selecting two target symbols of a preset time domain position from the second time slot of each PRB;
a signal processing unit 62, configured to map M32-port CSI-RS signals into the two target symbols of the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
The present example will be described later with reference to the definition of subband sizes (subbands sizes) in TS36.213 Table (Table)7.2.1 to 3. Wherein said Table (Table)7.2.1-3 can be seen in Table 2:
TABLE 2
Preferably, the preset time domain position in this embodiment may be a position preset according to an actual situation, for example, referring to fig. 5, the position located at the 2 nd and 3 rd symbol positions in the time domain may be selected as the preset time domain position.
In addition, the present embodiment specifically provides a way to determine the number of M, as follows:
and a signal processing unit 62, 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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs.
Further, the present embodiment performs a detailed description of the operation of determining M in the following three examples in conjunction with the above table 2:
examples one,
The signal processing unit 62 is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is four, where 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 may be determined that the transmission mode scenario defined in table 2 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; at least 32 REs are required if a 32-port CSI-RS signal needs to be carried.
Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, the System bandwidth (System bandwidth) is 8-26, a certain sub-band (Subband) comprises 4RBs, and 4 PRBs of one Subband comprise 3 complete 32port CSI-RSs and the density is 0.75 RE/port/PRB.
Examples two,
The signal processing unit 62 is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is three, where 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
For example, the System bandwidth (System bandwidth) is 27-63, and a certain sub-band (subband) comprises 4 complete 32port CSI-RSs in 6 PRBs, and the density is 0.67 RE/port/PRB.
Examples III,
The signal processing unit 62 is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, where the third threshold range may be sixty-four or more 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 may be determined that the transmission mode scenario defined in table 1 above in the protocol corresponding to this example is; further, M can be determined based on the number of PRBs each subband contains.
It should be understood that each PRB may include 7 × 12 Resource Elements (REs), that is, corresponding to 7 symbols in the time domain and 12 subcarriers in the frequency domain, where each RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain; if a 32-port CSI-RS signal needs to be carried, at least 32 REs are required. Since two symbols consecutive in the time domain are selected in each PRB in this embodiment, that is, at least 16 subcarriers of REs in the frequency domain can carry a CSI-RS signal of 32 ports.
27-63 of System bandwidth (System bandwidth), 6 complete 32port CSI-RSs in 8 PRBs of a certain sub-band (sub-band) comprising one sub-band, and the density is 0.75 RE/port/PRB.
Therefore, by adopting the scheme, continuous physical resource blocks can be selected from each sub-band, and the M32-port CSI-RS signals are mapped to the selected physical resource blocks and transmitted. Therefore, the 32-port CSI-RS signals can be transmitted from the continuous physical resource blocks in the sub-frequency band, the density of the signals is high, and the coverage performance of the 32-port CSI-RS signals is guaranteed.
The integrated module according to the embodiment of the present invention may also be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as an independent product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product stored in a storage medium, and including several instructions for enabling a computer device (which may be a personal computer, a network device, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (16)
1. A method of signal transmission, the method comprising:
selecting K physical resource blocks PRB contained in a sub-frequency band; the K is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
mapping M32-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 selecting K PRBs included in the sub-band includes:
selecting a second time slot of each PRB from K PRBs contained in the sub-band;
selecting two target symbols of a preset time domain position from the second time slot of each PRB;
correspondingly, the mapping the M32-port CSI-RS signals to the K PRBs and transmitting the CSI-RS signals includes:
mapping M32-port CSI-RS signals into the two target symbols of the K PRBs and transmitting the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
2. The method of claim 1, wherein the mapping M32-port CSI-RS signals to two target symbols at the preset positions in the K PRBs comprises:
and determining the number M of 32-port CSI-RS signals capable of being transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs contained in each sub-band.
3. The method of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each sub-band is two, determining that the number M of CSI-RS signals of 32 ports capable of being transmitted in the K PRBs 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 of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each sub-band is three, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two, where the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three.
5. The method of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three, where the third threshold range is greater than or equal to sixty-four and less than or equal to 110.
6. The method of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each sub-band is four, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three, where the first threshold range is greater than or equal to eight and less than or equal to twenty-six.
7. The method of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of the PRBs corresponding to the system bandwidth is within a second threshold range and the number of the PRBs included in each sub-band is six, determining that the number M of the CSI-RS signals of the 32 ports which can be transmitted in the K PRBs 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 of claim 2, wherein the determining the number M of 32-port CSI-RS signals that can be transmitted in the K PRBs based on the number of PRBs corresponding to the system bandwidth and the number K of PRBs included in each subband comprises:
when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is six, determining that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is four, where the third threshold range is sixty-four or more and 110 or less.
9. A network device, comprising:
the resource selection unit is used for selecting K physical resource blocks PRB contained in the sub-frequency band; k is an integer greater than or equal to 1, and the K physical resource blocks are PRBs (physical resource blocks) which are continuous in the frequency domain;
a signal processing unit, configured to map M32-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 a second time slot of each PRB from the K PRBs included in the subband; selecting two target symbols of a preset time domain position from the second time slot of each PRB;
correspondingly, the signal processing unit is further configured to map M32-port CSI-RS signals into the two target symbols of the K PRBs and transmit the CSI-RS signals; wherein M is an integer of not less than K and not less than 1.
10. The network device of claim 9,
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 CSI-RS signals of 32 ports that can be transmitted in the K PRBs.
11. The network device of claim 10,
the signal processing unit is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is one when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is two, where the first threshold range is greater than or equal to eight and less than or equal to twenty-six.
12. The network device of claim 10,
and a signal processing unit, configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is two when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is three, where the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three.
13. The network device of claim 10,
and a signal processing unit, configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is four, where the third threshold range is sixty-four or more and 110 or less.
14. The network device of claim 10,
the signal processing unit is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a first threshold range and the number of PRBs included in each subband is four, where the first threshold range is greater than or equal to eight and less than or equal to twenty-six.
15. The network device of claim 10,
and the signal processing unit is configured to determine that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is three when the number of PRBs corresponding to the system bandwidth is within a second threshold range and the number of PRBs included in each subband is six, where the second threshold range is greater than or equal to twenty-seven and less than or equal to sixty-three.
16. The network device of claim 10,
and a signal processing unit, configured to determine, when the number of PRBs corresponding to the system bandwidth is within a third threshold range and the number of PRBs included in each subband is six, that the number M of CSI-RS signals of 32 ports that can be transmitted in the K PRBs is four, where the third threshold range is sixty-four or more and 110 or less.
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