CN106559112B - Channel information feedback method, resource allocation method, device, base station and user equipment - Google Patents
Channel information feedback method, resource allocation method, device, base station and user equipment Download PDFInfo
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- CN106559112B CN106559112B CN201510617812.5A CN201510617812A CN106559112B CN 106559112 B CN106559112 B CN 106559112B CN 201510617812 A CN201510617812 A CN 201510617812A CN 106559112 B CN106559112 B CN 106559112B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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Abstract
The invention provides a channel information feedback method, a resource allocation method, a device, a base station and user equipment, which are used for solving the problem that the conventional channel state information feedback method cannot meet the requirement of multi-user multi-input multi-output (MU-MIMO), so that the effective utilization of the MU-MIMO is not facilitated. The invention comprises the following steps: acquiring a first measurement resource and a second measurement resource configured by a base station for user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment, which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment, on the user equipment, and second interference information of other cells on the cell in which the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment; and according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding back the channel quality indication information to the base station.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for channel information feedback and resource allocation, a base station, and a user equipment.
Background
EB/FD Multiple-Input Multiple-Output (MIMO) is an important technology in application of Release13, and a large-scale two-dimensional antenna array is adopted at a base station end, so that Multi-User Multiple-Input Multiple-Output (MU-MIMO) transmission can be better supported, and the system capacity is greatly improved. However, in the current Long Term Evolution (LTE)/LTE-a standard, Channel State Information (CSI) fed back by a User Equipment (UE) is transmitted based on a Single-User Multiple-Input Multiple-Output (SU-MIMO) used by a base station eNB. Therefore, if the eNB schedules a plurality of users to adopt space division multiplexing, it needs to recalculate information such as Rank Indicator (RI)/Precoding Matrix Indicator (PMI)/Channel Quality Indicator (CQI) in consideration of mutual interference between the users. Interference measurement and reporting among multiple users are not supported in the current standard, so that the existing CSI feedback method cannot meet the requirements of MU-MIMO, and further the effective utilization of MU-MIMO is not facilitated.
Disclosure of Invention
The invention aims to provide a channel information feedback and resource allocation method, a device, a base station and user equipment, which are used for solving the problem that the existing CSI feedback method cannot meet the requirements of MU-MIMO, so that the MU-MIMO cannot be effectively utilized.
In order to achieve the above object, the present invention provides a channel information feedback method, applied to a user equipment, including:
acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding back the channel quality indication information to the base station.
Wherein the obtaining of the channel quality indication information of the user equipment according to the first measurement resource and the second measurement resource includes:
acquiring channel information of the user equipment according to the first measurement resource;
acquiring the first interference information and the second interference information according to the second measurement resource;
and obtaining channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information and power distribution ratio information between the user equipment and the paired user equipment.
The second measurement resource includes at least one first sub-measurement resource for acquiring the first interference information and one second sub-measurement resource for acquiring the second interference information.
Wherein the second measurement resource comprises one of the first sub-measurement resource and one of the second sub-measurement resource, and each of the first sub-measurement resource occupies two resource ports, an
The obtaining the first interference information according to the second measurement resource specifically includes:
obtaining a plurality of interference information to be processed of the first sub-measurement resource based on a plurality of preset phase difference measurements of two resource ports;
and calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
Wherein the second measurement resource includes two first sub-measurement resources and one second sub-measurement resource, one of the first sub-measurement resources is used to obtain interference information of a first paired user equipment in the same cell with the user equipment to the user equipment, and the other one of the first sub-measurement resources is used to obtain interference information of a second paired user equipment in the same cell with the user equipment to the user equipment, and
the obtaining the first interference information according to the second measurement resource specifically includes:
acquiring interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment according to one first sub-measurement resource;
acquiring interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment according to the other first sub-measurement resource;
and acquiring interference information of the first paired user equipment and the second paired user equipment to the user equipment when the user equipment, the first paired user equipment and the second paired user equipment are paired according to the two first sub-measurement resources.
The invention also provides a channel information feedback device, which is applied to user equipment and comprises the following components:
a first obtaining module, configured to obtain a first measurement resource and a second measurement resource configured by a base station for the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in a same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and the processing module is used for obtaining the channel quality indication information of the user equipment according to the first measurement resource and the second measurement resource and feeding back the channel quality indication information to the base station.
Wherein the processing module comprises:
a first obtaining unit, configured to obtain channel information of the user equipment according to the first measurement resource;
a second obtaining unit, configured to obtain the first interference information and the second interference information according to the second measurement resource;
a third obtaining unit, configured to obtain channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information, and power allocation ratio information between the user equipment and the paired user equipment.
The second measurement resource includes at least one first sub-measurement resource for acquiring the first interference information and one second sub-measurement resource for acquiring the second interference information.
Wherein the second measurement resource comprises one of the first sub-measurement resource and one of the second sub-measurement resource, and each of the first sub-measurement resource occupies two resource ports, an
The second obtaining unit specifically includes:
the first obtaining subunit is configured to obtain multiple pieces of to-be-processed interference information, which are obtained by measuring multiple preset phase differences of two resource ports by the first sub-measurement resource;
and the calculating unit is used for calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
Wherein the second measurement resource includes two first sub-measurement resources and one second sub-measurement resource, one of the first sub-measurement resources is used to obtain interference information of a first paired user equipment in the same cell with the user equipment to the user equipment, and the other one of the first sub-measurement resources is used to obtain interference information of a second paired user equipment in the same cell with the user equipment to the user equipment, and
the second obtaining unit specifically includes:
a second obtaining subunit, configured to obtain, according to one of the first sub-measurement resources, interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment;
a third obtaining subunit, configured to obtain, according to another of the first sub-measurement resources, interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment;
a fourth obtaining unit, configured to obtain, according to the two first sub-measurement resources, interference information of the user equipment by the first paired user equipment and the second paired user equipment when the user equipment, the first paired user equipment, and the second paired user equipment are paired.
The invention also provides user equipment which comprises the channel information feedback device.
The invention also provides a resource allocation method, which is applied to the base station and comprises the following steps:
configuring a first measurement resource and a second measurement resource according to channel state information of user equipment and sending the first measurement resource and the second measurement resource to the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission with the user equipment, and second interference information of other cells to the cell in which the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and acquiring the channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
Wherein, the configuring the first measurement resource and the second measurement resource according to the resource configuration information of the user equipment includes:
estimating long-term channel direction information of the user equipment according to a channel Sounding Reference Signal (SRS) sent by the user equipment, and configuring the first measurement resource according to the long-term channel direction information of the user equipment;
and estimating long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment.
Wherein the step of configuring the second measurement resource according to the long-term channel direction information of the paired user equipment comprises:
configuring at least one first sub-measurement resource for acquiring the first interference information according to the long-term channel direction information of the paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment;
configuring a second sub-measurement resource for obtaining the second interference information.
Wherein the step of configuring at least one first sub-measurement resource for acquiring the first interference information according to the long-term channel direction information of the paired user equipment specifically includes:
and correspondingly configuring one first sub-measurement resource according to the long-term channel direction information of each paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment.
The first measurement resource, the first sub-measurement resource and the second sub-measurement resource are all beam-formed channel state information reference signals occupying two resource ports.
The invention also provides a resource allocation device, which is applied to the base station and comprises the following components:
a configuration module, configured to configure a first measurement resource and a second measurement resource according to channel state information of a user equipment and send the first measurement resource and the second measurement resource to the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in a same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and a second obtaining module, configured to obtain channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
Wherein the configuration module comprises:
a first configuration unit, configured to estimate long-term channel direction information of the user equipment according to a channel sounding reference signal SRS sent by the user equipment, and configure the first measurement resource according to the long-term channel direction information of the user equipment;
and the second configuration unit is used for estimating the long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment.
Wherein the second configuration unit includes:
a first configuration subunit, configured to configure at least one first sub-measurement resource for acquiring the first interference information according to long-term channel direction information of the paired user equipment, and use the first sub-measurement resource as a first measurement resource of the paired user equipment;
a second configuration subunit, configured to configure a second sub-measurement resource for acquiring the second interference information.
The first configuration subunit is specifically configured to configure one first sub-measurement resource according to the long-term channel direction information of each paired user equipment, and use the first sub-measurement resource as the first measurement resource of the paired user equipment.
The invention also provides a base station which comprises the resource allocation device.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the user equipment firstly obtains the first measurement resource and the second measurement resource configured for the user equipment by the base station, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment in the same cell with the user equipment to the user equipment, and second interference information of other cells to the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment, and then, according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding the channel quality indication information back to the base station, so that the problem that the existing channel indication information feedback method cannot meet the requirements of MU-MIMO is solved, and effective utilization of MU-MIMO is facilitated.
Drawings
Fig. 1 is an interaction flowchart when a base station and a user equipment feed back channel state information in the prior art;
FIG. 2 is a diagram illustrating allocation of CSI resources in the prior art;
fig. 3 is a first flowchart of a channel information feedback method according to an embodiment of the present invention;
fig. 4 is a second flowchart of a channel information feedback method according to an embodiment of the present invention;
FIG. 5 is a first flowchart of a resource allocation method according to an embodiment of the present invention;
FIG. 6 is a second flowchart of a resource allocation method according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a first structure of a base station and a user equipment in a resource allocation method according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a first measurement resource allocation of a resource allocation method according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a second structure of a base station and a user equipment in the resource allocation method according to the embodiment of the present invention;
fig. 10 is a schematic diagram of a second measured resource allocation of the resource allocation method according to the embodiment of the invention;
fig. 11 is a block diagram of a channel information feedback apparatus according to an embodiment of the present invention;
fig. 12 is a block diagram of a resource allocation apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings.
As shown in fig. 1 and 2, the configuration of the CSI-RS in the current standard is UE-specific, but generally cell-specific, for mobile stations. When using a mobile-specific beamformed CSI-RS based CSI feedback regime, the eNB configures different beamformed CSI-RS resources (commonly referred to as CSI-processes) for different UEs. As shown in fig. 1, the configuration process may specifically include:
step S1: a base station sends a long-term channel state information reference signal to user equipment;
step S2: user equipment sends a channel sounding reference signal to a base station;
step S3: the base station performs virtualization weighting processing on all non-precoded CSI-RSs according to the channel sounding reference signal;
step S4: the base station allocates one or more beam-formed CSI-RS resources for the user equipment;
step S5: and the user equipment feeds back the CSI information to the base station.
In addition, in order for the UE to perform at the correct rate, the UE needs to know which Resource Elements (REs) are used for CSI-RS (whether for the UE or other UEs in the cell), and the zero power CSI-RS resource is usually used for this purpose.
However, in the CSI feedback method, interference measurement and reporting among multiple users are not supported, and the requirement of MU-MIMO cannot be met, which is not favorable for effective utilization of MU-MIMO.
Based on this, embodiments of the present invention provide a channel information feedback method, a resource allocation method, an apparatus, a base station, and user equipment, so as to solve the problem that the existing CSI feedback method cannot meet the requirement of MU-MIMO, which is further unfavorable for effective utilization of MU-MIMO.
The first embodiment:
as shown in fig. 3, the channel information feedback method includes:
step 11: acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
step 12: and according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding back the channel quality indication information to the base station.
Specifically, the first measurement resource may be a CSI-RS resource (CSI reference signal resource); the second measurement resource may specifically include a CSI-IM resource (CSI interference measurement resource) and a plurality of CSI paired user interference measurement resources (CSI-CIM resources), where the CSI-IM resource is configured to measure second interference information of a cell where the user equipment is located from another cell, and the CSI-CIM resource is configured to obtain first interference information of a paired user equipment, which is located in the same cell as the user equipment and performs multi-user transmission in a paired manner with the user equipment, on the user equipment. In addition, the second measurement resource may include only several CSI-CIM resources, and in this case, the CSI-CIM resources are used to obtain not only the first interference information but also the second interference information.
In this embodiment, a user equipment first obtains a first measurement resource and a second measurement resource configured by a base station for the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, and the second measurement resource is used to obtain first interference information of a paired user equipment in the same cell as the user equipment to the user equipment and second interference information of other cells to the cell where the user equipment is located, and then according to the first measurement resource and the second measurement resource, channel quality indication information of the user equipment is obtained and fed back to the base station, so that a problem that an existing channel indication information feedback method cannot meet MU-MIMO requirements is solved, and effective utilization of MU-MIMO is facilitated.
Second embodiment:
as shown in fig. 4, the channel information feedback method includes:
step 11: acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
step 121: acquiring channel information of the user equipment according to the first measurement resource;
step 122: acquiring the first interference information and the second interference information according to the second measurement resource;
step 123: and obtaining channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information and power distribution ratio information between the user equipment and the paired user equipment.
In this embodiment, the power allocation ratio information between the ue and the paired ue may be notified by the base station, or may be preset, and in this embodiment, the ue may feed back MU-CQI under multiple power allocation conditions, such as: and respectively feeding back MU-CQI under the conditions that the power allocation of the two paired users is P/2: P/2, 1/3P:2/3P, 2/3P:1/3P and the like, wherein the specific power allocation indication may be notified to the UE by the eNB in real time or may be semi-statically or statically configured.
The third embodiment:
the channel information feedback method comprises the following steps:
step 11: acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
step 12: and according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding back the channel quality indication information to the base station.
Further, in this embodiment, the second measurement resource may include at least one first sub-measurement resource for acquiring the first interference information and a second sub-measurement resource for acquiring the second interference information. The first sub-measurement resource may be specifically a CSI-CIM resource, and the second sub-measurement resource may be specifically a CSI-IM resource.
Specifically, in this embodiment, the second measurement resource includes one first sub-measurement resource and one second sub-measurement resource, and each first sub-measurement resource occupies two resource ports, an
The obtaining the first interference information according to the second measurement resource specifically includes:
obtaining a plurality of interference information to be processed of the first sub-measurement resource based on a plurality of preset phase difference measurements of two resource ports;
and calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
In this embodiment, when the UE acquires the first interference information by using the CSI-CIM resources, it needs to make a certain assumption on a phase difference between the CSI-CIM resources (respectively corresponding to 2 polarizations) occupying 2 port ports, for example, the UE may assume a plurality of phase differences, then measure interference information measured based on each phase difference, and then perform an averaging process to obtain the first interference information used for calculating the MU-CQI.
The fourth embodiment:
the channel information feedback method comprises the following steps:
step 11: acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
step 12: and according to the first measurement resource and the second measurement resource, obtaining channel quality indication information of the user equipment and feeding back the channel quality indication information to the base station.
Further, in this embodiment, the second measurement resource may include at least one first sub-measurement resource for acquiring the first interference information and a second sub-measurement resource for acquiring the second interference information.
Specifically, in this embodiment, the second measurement resource includes two first sub-measurement resources and one second sub-measurement resource, where one of the first sub-measurement resources is used to obtain interference information of a first paired user equipment in the same cell as the user equipment on the user equipment, and the other of the first sub-measurement resources is used to obtain interference information of a second paired user equipment in the same cell as the user equipment on the user equipment, and
the obtaining the first interference information according to the second measurement resource specifically includes:
acquiring interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment according to one first sub-measurement resource;
acquiring interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment according to the other first sub-measurement resource;
and acquiring interference information of the first paired user equipment and the second paired user equipment to the user equipment when the user equipment, the first paired user equipment and the second paired user equipment are paired according to the two first sub-measurement resources.
In this embodiment, the user equipment obtains channel information of the user equipment by using CSI-RS resource (first measurement resource) according to the configuration of the eNB, measures interference information between the first paired user equipment, the second paired user equipment and the user equipment by using two CSI-CIM resources (first sub-measurement resources), performs inter-cell interference measurement by using CSI-IM resource (second sub-measurement resource), calculates MU-CQI according to the measured information, and feeds the MU-CQI back to the eNB, thereby solving the problem that the existing channel indication information feedback method cannot meet the MU-MIMO requirements.
In addition, in this embodiment, the user may calculate and feed back multiple MU-CQIs, for example, a MU-CQI calculated according to a first CSI-CIMresource when the user equipment is paired with the first paired user equipment, a MU-CQI calculated according to a second CSI-CIMresource when the user equipment is paired with the second paired user equipment, and a MU-CQI calculated according to two CSI-cimresources when the three user equipments are paired, and the user equipment may also feed back MU-CQIs under several power allocation conditions, such as: and respectively feeding back MU-CQI under the conditions that the power distribution of the paired three user equipment is 1/3P:1/3P:1/3P, 2/3P:1/6P:1/6P, 1/6P:5/12P:5/12P, 1/6P:1/6P:2/3P and the like.
Fifth embodiment:
as shown in fig. 5, the present invention further provides a resource allocation method, including:
step 21: configuring a first measurement resource and a second measurement resource according to channel state information of user equipment and sending the first measurement resource and the second measurement resource to the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission with the user equipment, and second interference information of other cells to the cell in which the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
step 22: and acquiring the channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
Specifically, the first measurement resource may be a CSI-RS resource (CSI reference signal resource); the second measurement resource may specifically include a CSI-IM resource (CSI interference measurement resource) and a plurality of CSI paired user interference measurement resources (CSI-CIM resources), where the CSI-IM resource is used to measure second interference information of the other cells to the cell where the user equipment is located, and the CSI-CIM resource is used to obtain first interference information of paired user equipment located in the same cell as the user equipment to the user equipment. In addition, the second measurement resource may include only several CSI-CIM resources, and in this case, the CSI-CIM resources are used to obtain not only the first interference information but also the second interference information.
In this embodiment, the eNB configures an MU-CSI Process for the ue, where the MU-CSI Process includes one CSI-RS resource, one CSI-IM resource, and a plurality of CSI-CIM resources, and the CSI-CIM resource and the CSI-IM resource can obtain first interference information of a paired ue located in the same cell as the ue to the ue and second interference information of another cell to the cell where the ue is located, so as to solve a problem that an existing CSI feedback method cannot meet requirements of MU-MIMO due to interference measurement and reporting between multiple users that are not supported in a current standard.
Sixth embodiment:
as shown in fig. 6, the resource allocation method includes:
step 211: estimating long-term channel direction information of the user equipment according to a channel Sounding Reference Signal (SRS) sent by the user equipment, and configuring the first measurement resource according to the long-term channel direction information of the user equipment;
step 212: estimating long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment;
step 22: and acquiring the channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
In this embodiment, long-term channel direction information of the user equipment is estimated according to the SRS of the user equipment, a first measurement resource is configured, long-term channel direction information of the paired user equipment is estimated according to the SRS sent by the paired user equipment, a second measurement resource is configured, the second measurement resource of the user equipment is used as the first measurement resource of the paired user equipment, and the paired user equipment is a user equipment that may be paired with the user equipment, thereby achieving interference measurement between multiple users.
Seventh embodiment:
the resource allocation method comprises the following steps:
step 211: estimating long-term channel direction information of the user equipment according to a channel Sounding Reference Signal (SRS) sent by the user equipment, and configuring a first measurement resource according to the long-term channel direction information of the user equipment;
step 212: estimating long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring a second measurement resource according to the long-term channel direction information of the paired user equipment, wherein the second measurement resource is used for acquiring first interference information of the paired user equipment, which is in the same cell as the user equipment and is paired with the user equipment for multi-user transmission, on the user equipment, and second interference information of other cells on the cell where the user equipment is located;
step 22: and acquiring the channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
Further, the step 212 includes:
configuring at least one first sub-measurement resource for acquiring the first interference information according to the long-term channel direction information of the paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment;
configuring a second sub-measurement resource for obtaining the second interference information.
Specifically, the step of configuring at least one first sub-measurement resource for acquiring the first interference information according to the long-term channel direction information of the paired user equipment includes:
and correspondingly configuring one first sub-measurement resource according to the long-term channel direction information of each paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment.
In this embodiment, the base station configures the first measurement resource, the first sub-measurement resource, and the second sub-measurement resource, thereby implementing interference measurement among multiple users, and facilitating effective utilization of MU-MIMO.
In addition, in an embodiment of the present invention, the first measurement resource, the first sub-measurement resource, and the second sub-measurement resource are all beam-formed csi reference signals that occupy two resource ports.
Assume that the base station configures one CSI-RS resource, one CSI-CIM resource, and one CSI-IM resource for the UE1 in fig. 7, where the CSI-RS resource is a beamforming beamformed CSI-RS with two port ports (as shown in a in fig. 8), and the CSI-CIM resource is a beamforming CSI-RS with two port ports (as shown in B in fig. 8), and the base station configures the CSI-CIM resource to the local cell and other users (e.g., UE2 in fig. 7) paired with the UE1 for measuring channel information of the UE 2.
Assume that the base station configures one CSI-RS resource, two CSI-CIM resources, and one CSI-IM resource for the UE1 in fig. 9, where one CSI-RS resource is a 2-port beamforming CSI-RS (as shown in a in fig. 10), the first CSI-CIM resource is a 2-port beamforming CSI-RS (as shown in B in fig. 10), and the eNB configures the resource as the CSI-RS resource to other users (as shown in UE2 in fig. 9) in the cell, and the second CSI-CIM resource is a 2-port beamforming CSI-RS (as shown in C in fig. 10), and the eNB configures the resource as the CSI-RS resource to other users (as shown in UE3 in fig. 9) in the cell.
According to the embodiment of the invention, the base station configures the measurement resources for the user equipment to obtain the first interference information of the paired user equipment in the same cell with the user equipment to the user equipment and the second interference information of other cells to the cell in which the user equipment is located, so that the problem that the existing CSI feedback method cannot meet the requirements of MU-MIMO because the interference measurement and report among multiple users are not supported in the current standard is solved.
Eighth embodiment:
as shown in fig. 11, the present invention further provides a channel information feedback apparatus, applied to a user equipment, including:
a first obtaining module 111, configured to obtain a first measurement resource and a second measurement resource configured by a base station for the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in the same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
a processing module 112, configured to obtain channel quality indication information of the ue according to the first measurement resource and the second measurement resource, and feed back the channel quality indication information to the base station.
In the channel information feedback apparatus according to the embodiment of the present invention, the processing module 112 includes:
a first obtaining unit, configured to obtain channel information of the user equipment according to the first measurement resource;
a second obtaining unit, configured to obtain the first interference information and the second interference information according to the second measurement resource;
a third obtaining unit, configured to obtain channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information, and power allocation ratio information between the user equipment and the paired user equipment.
In the channel information feedback apparatus according to the embodiment of the present invention, the second measurement resource includes at least one first sub-measurement resource used for acquiring the first interference information and a second sub-measurement resource used for acquiring the second interference information.
In the channel information feedback device of the embodiment of the present invention, the second measurement resource includes one of the first sub-measurement resources and one of the second sub-measurement resources, and each of the first sub-measurement resources occupies two resource ports, an
The second obtaining unit specifically includes:
the first obtaining subunit is configured to obtain multiple pieces of to-be-processed interference information, which are obtained by measuring multiple preset phase differences of two resource ports by the first sub-measurement resource;
and the calculating unit is used for calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
In the channel information feedback apparatus of the embodiment of the present invention, the second measurement resource includes two first sub measurement resources and one second sub measurement resource, where one of the first sub measurement resources is used to obtain interference information of a first paired user equipment in the same cell as the user equipment on the user equipment, and the other one of the first sub measurement resources is used to obtain interference information of a second paired user equipment in the same cell as the user equipment on the user equipment, and
the second obtaining unit specifically includes:
a second obtaining subunit, configured to obtain, according to one of the first sub-measurement resources, interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment;
a third obtaining subunit, configured to obtain, according to another of the first sub-measurement resources, interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment;
a fourth obtaining unit, configured to obtain, according to the two first sub-measurement resources, interference information of the user equipment by the first paired user equipment and the second paired user equipment when the user equipment, the first paired user equipment, and the second paired user equipment are paired.
The invention also provides user equipment which comprises the channel information feedback device.
It should be noted that the apparatus and the user equipment are apparatuses and user equipments corresponding to the above-mentioned feedback method embodiment, and all implementation manners in the above-mentioned feedback method embodiment are applicable to the embodiments of the apparatus and the user equipment, and the same technical effect can be achieved.
Ninth embodiment:
as shown in fig. 12, the present invention further provides a resource allocation apparatus, applied to a base station, including:
a configuration module 121, configured to configure a first measurement resource and a second measurement resource according to channel state information of a user equipment and send the first measurement resource and the second measurement resource to the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in a same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
a second obtaining module 122, configured to obtain channel quality indication information fed back by the ue according to the first measurement resource and the second measurement resource.
In the apparatus for configuring channel information resources according to the embodiment of the present invention, the configuration module 121 includes:
a first configuration unit, configured to estimate long-term channel direction information of the user equipment according to a channel sounding reference signal SRS sent by the user equipment, and configure the first measurement resource according to the long-term channel direction information of the user equipment;
and the second configuration unit is used for estimating the long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment.
In the resource allocation apparatus of the embodiment of the present invention, the second allocation unit includes:
a first configuration subunit, configured to configure at least one first sub-measurement resource for acquiring the first interference information according to long-term channel direction information of the paired user equipment, and use the first sub-measurement resource as a first measurement resource of the paired user equipment;
a second configuration subunit, configured to configure a second sub-measurement resource for acquiring the second interference information.
In the resource allocation apparatus of the embodiment of the present invention, the first allocation subunit is specifically configured to allocate one first sub-measurement resource according to the long-term channel direction information of each paired user equipment, and use the first sub-measurement resource as the first measurement resource of the paired user equipment.
The embodiment of the invention also provides a base station which comprises the resource allocation device.
It should be noted that the apparatus and the base station are apparatuses and base stations corresponding to the above configuration method embodiment, and all the implementations in the above configuration method embodiment are applicable to the apparatus and the base station embodiment, and the same technical effects can be achieved.
In the embodiment of the invention, user equipment firstly acquires a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment in the same cell with the user equipment to the user equipment and second interference information of other cells to the cell in which the user equipment is located, and then channel quality indication information of the user equipment is obtained and fed back to the base station according to the first measurement resource and the second measurement resource, so that the problem that the existing channel indication information feedback method cannot meet the requirements of MU-MIMO is solved, and the effective utilization of MU-MIMO is facilitated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (19)
1. A channel information feedback method is applied to user equipment, and is characterized by comprising the following steps:
acquiring a first measurement resource and a second measurement resource configured by a base station for the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission by being paired with the user equipment on the user equipment, and second interference information of other cells on the cell where the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
obtaining and feeding back channel quality indication information of the user equipment to the base station according to the first measurement resource and the second measurement resource, including:
acquiring channel information of the user equipment according to the first measurement resource;
acquiring the first interference information and the second interference information according to the second measurement resource;
and obtaining channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information and power distribution ratio information between the user equipment and the paired user equipment.
2. The method of claim 1, wherein the second measurement resource comprises at least one first sub-measurement resource for obtaining the first interference information and a second sub-measurement resource for obtaining the second interference information.
3. The method of claim 2, wherein the second measurement resource comprises one of the first sub-measurement resource and one of the second sub-measurement resource, and each of the first sub-measurement resource occupies two resource ports, an
The obtaining the first interference information according to the second measurement resource specifically includes:
obtaining a plurality of interference information to be processed of the first sub-measurement resource based on a plurality of preset phase difference measurements of two resource ports;
and calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
4. The channel information feedback method according to claim 2, wherein the second measurement resource includes two first sub-measurement resources and one second sub-measurement resource, one of the first sub-measurement resources is used to obtain interference information of a first paired ue in a same cell as the ue on the ue, and the other of the first sub-measurement resources is used to obtain interference information of a second paired ue in the same cell as the ue on the ue, and
the obtaining the first interference information according to the second measurement resource specifically includes:
acquiring first interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment according to one first sub-measurement resource;
acquiring second interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment according to the other first sub-measurement resource;
and acquiring third interference information of the first paired user equipment and the second paired user equipment to the user equipment when the user equipment, the first paired user equipment and the second paired user equipment are paired according to the two first sub-measurement resources.
5. A channel information feedback device applied to User Equipment (UE) is characterized by comprising:
a first obtaining module, configured to obtain a first measurement resource and a second measurement resource configured by a base station for the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in a same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
a processing module, configured to obtain channel quality indication information of the ue according to the first measurement resource and the second measurement resource, and feed back the channel quality indication information to the base station;
the processing module comprises:
a first obtaining unit, configured to obtain channel information of the user equipment according to the first measurement resource;
a second obtaining unit, configured to obtain the first interference information and the second interference information according to the second measurement resource;
a third obtaining unit, configured to obtain channel quality indication information of the user equipment according to the channel information, the first interference information, the second interference information, and power allocation ratio information between the user equipment and the paired user equipment.
6. The apparatus of claim 5, wherein the second measurement resource comprises at least one first sub-measurement resource for obtaining the first interference information and a second sub-measurement resource for obtaining the second interference information.
7. The apparatus of claim 6, wherein the second measurement resource comprises one of the first sub-measurement resource and one of the second sub-measurement resource, and each of the first sub-measurement resource occupies two resource ports, an
The second obtaining unit specifically includes:
the first obtaining subunit is configured to obtain multiple pieces of to-be-processed interference information, which are obtained by measuring multiple preset phase differences of two resource ports by the first sub-measurement resource;
and the calculating unit is used for calculating the average value of the plurality of pieces of interference information to be processed to obtain the first interference information.
8. The apparatus according to claim 6, wherein the second measurement resource includes two first sub-measurement resources and one second sub-measurement resource, one of the first sub-measurement resources is used to obtain interference information of a first paired ue in a same cell as the ue on the ue, and the other of the first sub-measurement resources is used to obtain interference information of a second paired ue in the same cell as the ue on the ue, and
the second obtaining unit specifically includes:
a second obtaining subunit, configured to obtain, according to one of the first sub-measurement resources, first interference information of the first paired user equipment to the user equipment when the user equipment is paired with the first paired user equipment;
a third obtaining subunit, configured to obtain, according to another of the first sub-measurement resources, second interference information of the second paired user equipment to the user equipment when the user equipment is paired with the second paired user equipment;
a fourth obtaining unit, configured to obtain, according to the two first sub-measurement resources, third interference information of the user equipment by the first paired user equipment and the second paired user equipment when the user equipment, the first paired user equipment, and the second paired user equipment are paired.
9. A user equipment, characterized in that it comprises the channel information feedback device according to any of claims 5-8.
10. A resource allocation method is applied to a base station, and is characterized by comprising the following steps:
configuring a first measurement resource and a second measurement resource according to channel state information of user equipment and sending the first measurement resource and the second measurement resource to the user equipment, wherein the first measurement resource is used for acquiring channel information of the user equipment, the second measurement resource is used for acquiring first interference information of paired user equipment which is in the same cell with the user equipment and performs multi-user transmission with the user equipment, and second interference information of other cells to the cell in which the user equipment is located, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and acquiring the channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
11. The method of claim 10, wherein the configuring the first measurement resource and the second measurement resource according to the channel state information of the ue comprises:
estimating long-term channel direction information of the user equipment according to a channel Sounding Reference Signal (SRS) sent by the user equipment, and configuring the first measurement resource according to the long-term channel direction information of the user equipment;
and estimating long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment.
12. The method of claim 11, wherein the step of configuring the second measurement resource according to the long-term channel direction information of the paired ue comprises:
configuring at least one first sub-measurement resource for acquiring the first interference information according to the long-term channel direction information of the paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment;
configuring a second sub-measurement resource for obtaining the second interference information.
13. The method of claim 12, wherein the step of configuring at least one first sub-measurement resource for obtaining the first interference information according to the long-term channel direction information of the paired ue specifically comprises:
and correspondingly configuring one first sub-measurement resource according to the long-term channel direction information of each paired user equipment, and taking the first sub-measurement resource as the first measurement resource of the paired user equipment.
14. The method of claim 12, wherein the first measurement resource, the first sub-measurement resource, and the second sub-measurement resource are all beamformed csi reference signals occupying two resource ports.
15. A resource allocation device applied to a base station includes:
a configuration module, configured to configure a first measurement resource and a second measurement resource according to channel state information of a user equipment and send the first measurement resource and the second measurement resource to the user equipment, where the first measurement resource is used to obtain channel information of the user equipment, the second measurement resource is used to obtain first interference information, to the user equipment, of a paired user equipment that is in a same cell as the user equipment and that is paired with the user equipment and performs multi-user transmission, and second interference information, to a cell where the user equipment is located, of other cells, and the second measurement resource of the user equipment is the first measurement resource of the paired user equipment;
and a second obtaining module, configured to obtain channel quality indication information fed back by the user equipment according to the first measurement resource and the second measurement resource.
16. The apparatus of claim 15, wherein the configuration module comprises:
a first configuration unit, configured to estimate long-term channel direction information of the user equipment according to a channel sounding reference signal SRS sent by the user equipment, and configure the first measurement resource according to the long-term channel direction information of the user equipment;
and the second configuration unit is used for estimating the long-term channel direction information of the paired user equipment according to the SRS sent by the paired user equipment, and configuring the second measurement resource according to the long-term channel direction information of the paired user equipment.
17. The apparatus according to claim 16, wherein the second configuration unit comprises:
a first configuration subunit, configured to configure at least one first sub-measurement resource for acquiring the first interference information according to long-term channel direction information of the paired user equipment, and use the first sub-measurement resource as a first measurement resource of the paired user equipment;
a second configuration subunit, configured to configure a second sub-measurement resource for acquiring the second interference information.
18. The apparatus of claim 17, wherein the first configuring subunit is specifically configured to configure one first sub-measurement resource according to the long-term channel direction information of each of the paired user equipments, and use the first sub-measurement resource as the first measurement resource of the paired user equipment.
19. A base station, characterized in that it comprises a resource configuration arrangement according to any of claims 15-18.
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| CN109088683B (en) * | 2017-06-14 | 2020-12-29 | 中国移动通信有限公司研究院 | Method for measuring cross link interference between user terminals, user terminal and transmission receiving point |
| CN109150450B (en) * | 2017-06-16 | 2021-04-20 | 华为技术有限公司 | Signal transmission method, equipment and system |
| CN113472406A (en) * | 2021-06-29 | 2021-10-01 | 中国农业银行股份有限公司 | Multi-user pairing method and device |
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