CN106488472B - Channel information reporting method and terminal - Google Patents

Channel information reporting method and terminal Download PDF

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CN106488472B
CN106488472B CN201510533085.4A CN201510533085A CN106488472B CN 106488472 B CN106488472 B CN 106488472B CN 201510533085 A CN201510533085 A CN 201510533085A CN 106488472 B CN106488472 B CN 106488472B
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serving cell
cell
rsrp
crs
neighboring cell
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CN106488472A (en
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王飞
童辉
王启星
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]

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Abstract

The invention discloses a channel information reporting method and a terminal, wherein the method comprises the following steps: a terminal measures a serving cell and an adjacent cell by using a cell Discovery Reference Signal (DRS) configured for the terminal by network side equipment, and respectively obtains measurement information of the serving cell and measurement information of the adjacent cell; the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO base station (eNB) or a non-FD-MIMO eNB, and correspondingly, the base station to which the neighboring cell belongs is a non-FD-MIMO eNB or an FD-MIMO eNB; the terminal compares the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; and when the comparison result shows that the channel quality of the adjacent cell is superior to that of the serving cell, the terminal sends the measurement information of the adjacent cell and/or the measurement information of the serving cell to network side equipment.

Description

Channel information reporting method and terminal
Technical Field
The present invention relates to a Long Term Evolution-Advanced (LTE-a) Advanced Evolution technology, and in particular, to a channel information reporting method and terminal.
Background
Large-scale antenna technology is one of the key technologies in LTE-a Evolution and the fifth Generation (5G) in the future, and one of the important issues of RAN1 in the current third Generation Partnership Project (3GPP, 3rd Generation Partnership Project) thirteenth version (R13) "Study on Evolution/Full-dimension (fd) MIMO for LTE" mainly studies the further Evolution of Multiple Input Multiple Output (MIMO) in Long Term Evolution (LTE).
The antenna array can be generally divided into two parts: a physical antenna array and a transmit-receive channel array. Conventional MIMO technology is mainly based on one-dimensional antenna arrays (typically horizontal-dimensional antenna arrays). Fig. 1-1 is a schematic structural diagram of a two-dimensional antenna array in the related art, as shown in fig. 1-1, specifically, the physical antenna array 111 may be two-dimensional multiple-input multiple-output (2D-MIMO) (the physical antenna array in fig. 1-1 is 8 rows and 8 columns), but the transceiving channel array 112 is one-dimensional (the transceiving channel array in fig. 1-1 is 1 row and 8 columns), and multiple physical antenna arrays with the same polarization in the same column are connected to the same transceiving channel. Therefore, only the phase difference between the plurality of physical antenna elements in the horizontal dimension can be adjusted, but the phase difference between the plurality of physical antenna elements in the vertical dimension cannot be adjusted, so that the conventional MIMO can only perform Beam forming in the horizontal dimension, while the Beam shape in the vertical dimension is fixed (usually, the 3dB bandwidth of the vertical dimension is less than 10 degrees), and the Beam in fig. 1-1 can only be adjusted in the horizontal dimension and oriented, but the direction of the vertical dimension is fixed (generally determined by the downward inclination angle).
FD-MIMO is mainly based on two-dimensional antenna array (multiple antenna arrays in the same column are connected to multiple transceiving channels), fig. 1-2 is a schematic structural diagram of a two-dimensional antenna array in related art, as shown in fig. 1-2, specifically, the physical antenna array 122 and the transceiving channel array 121 are both two-dimensional, and in an extreme case, as shown in fig. 1-2, the physical antenna array and the transceiving channel array are 8 rows and 8 columns, and each physical antenna array corresponds to one transceiving channel, so that not only the phase difference between multiple physical antenna arrays in the horizontal dimension can be adjusted, but also the phase difference between multiple physical antenna arrays in the vertical dimension can be adjusted, FD-MIMO can perform beamforming not only in the horizontal dimension, but also can perform beamforming in the vertical dimension, Beam in fig. 1-2 can not only adjust the orientation am in the horizontal dimension, but also can be oriented in the vertical dimension.
Because the users 123 (terminals 123) are distributed at different heights in an actual environment, especially in some high-rise scenes, and the distribution range of the users 123 in the vertical dimension is large, it is difficult for a conventional base station to simultaneously cover users at high and low levels, and therefore FD-MIMO is more suitable for such scenes with high-rise coverage.
The conventional eNB has a fixed beam width and orientation in the vertical dimension regardless of the service beam or the broadcast beam, and generally has a vertical dimension 3dB bandwidth smaller than 10 degrees as shown in the left diagrams of fig. 1 to 3, so that the conventional eNB cannot well cover all users when the distribution range of the users in the vertical dimension is large in the actual environment. Although FD-MIMO can form narrower service beams and can be oriented in the vertical dimension so that the maximum beam direction is directed to the user, in order to cover users with different heights in the cell as much as possible, FD-MIMO needs to form wider broadcast beams as shown in the right diagrams of fig. 1-3, because common control signals such as CRS and PDCCH depend on the broadcast beams.
FD-MIMO is an important direction for subsequent LTE evolution, and has greater advantages in high-rise scenarios, so it is likely that some FD-MIMO enbs will be newly deployed in some high-rise scenarios in the future, while the original legacy enbs will continue to remain. Thus, there is a scenario where: as shown in fig. 1-4, for the FD-MIMO eNB, the vertical dimension 3dB width of a broadcast beam is large (to cover users with different heights), and a service beam is narrow, and the beam can be adjusted in the vertical dimension to point to a target user; for a conventional eNB, the broadcast beam and the traffic beam are both narrow in the vertical dimension, 3dB wide.
In the following fig. 1-4 as examples, the serving Cell of UE1 belongs to the legacy eNB, and the FD-MIMO Cell is the neighbor Cell of UE 1. When the UE1 moves to the position shown in fig. 1-4, the channel quality of the neighbor data channel is better than that of the serving cell's data channel, but since the neighbor CRS _ RSRP measured by the UE1 is not better than that of the serving cell, i.e., Event A3(Event A3) is not satisfied, where CRS _ RSRP represents CRS-based RSRP; because event a3 is not satisfied, according to the existing standard, UE1 does not report the measurement result, and therefore the network side device does not switch UE1 from the serving Cell to the neighboring Cell, and in this case, in order to obtain better service data quality, UE1 should switch from the conventional eNB Cell to the FD-MIMO Cell, thereby improving network performance.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a terminal for reporting channel information to solve at least one problem in the prior art, so that when a network has both FD-MIMO eNB and conventional eNB, network performance can be optimized, thereby improving user experience.
The technical scheme of the embodiment of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for reporting channel information, where the method includes:
a terminal measures a serving cell and an adjacent cell by using a cell Discovery Reference Signal (DRS) configured for the terminal by network side equipment, and respectively obtains measurement information of the serving cell and measurement information of the adjacent cell;
the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, wherein the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO base station (eNB) or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB;
the terminal compares the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result;
and when the comparison result shows that the channel quality of the adjacent cell is superior to that of the serving cell, the terminal sends the measurement information of the adjacent cell and/or the measurement information of the serving cell to network side equipment.
In a second aspect, an embodiment of the present invention provides a terminal, where the terminal includes a measurement unit, a comparison unit, and a sending unit, where:
the measurement unit is configured to measure a serving cell and a neighboring cell by using a cell discovery reference signal DRS configured for the terminal by a network side device, and obtain measurement information of the serving cell and measurement information of the neighboring cell respectively;
the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, wherein the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO base station (eNB) or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB;
the comparing unit is used for comparing the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; triggering the sending unit when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell;
the sending unit is configured to send the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device.
The terminal measures a serving cell and a neighboring cell by using a cell Discovery Reference Signal (DRS) configured for the terminal by a network side device, and respectively obtains measurement information of the serving cell and measurement information of the neighboring cell; the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, wherein the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO (multiple-input multiple-output) base station eNB or a non-FD-MIMOeNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB; the terminal compares the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment; therefore, under the scene that an FD-MIMO eNB and a traditional eNB exist in the network, the network performance can be optimized, and the user experience is improved.
Drawings
Fig. 1-1 is a first schematic structural diagram of a two-dimensional antenna array in the related art;
fig. 1-2 are schematic structural diagrams of a two-dimensional antenna array in the related art;
fig. 1-3 are schematic diagrams of a service beam and a broadcast beam in the related art;
FIGS. 1-4 are schematic diagrams of a service beam and a broadcast beam in the related art;
fig. 1-5 are schematic diagrams illustrating a flow of implementing a channel information reporting method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an implementation flow of a second channel information reporting method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a sixth embodiment of the present invention;
FIG. 4 is a diagram illustrating a seventh embodiment of the present invention;
fig. 5 is a schematic structural diagram of an eighth terminal according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further elaborated below with reference to the drawings and the specific embodiments.
Example one
The embodiment of the invention provides a channel information reporting method, which is applied to a terminal (UE), wherein the functions realized by the method can be realized by calling a program code through a processor in the terminal, and the program code can be saved in a computer storage medium.
Fig. 1 to 5 are schematic diagrams illustrating an implementation procedure of a channel information reporting method according to an embodiment of the present invention, as shown in fig. 1 to 5, the channel information reporting method includes:
step S101, a terminal measures a serving cell and a neighboring cell by using a cell Discovery Reference Signal (DRS) configured for the terminal by a network side device, and respectively obtains measurement information of the serving cell and measurement information of the neighboring cell;
the type of a base station to which a serving cell belongs is different from the type of a base station to which a neighboring cell belongs, for example, the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD-MIMO) base station (eNB), and the base station to which the neighboring cell belongs is a non-FD-MIMO eNB; and when the base station to which the serving cell belongs is a non-FD-MIMO eNB, the base station to which the neighboring cell belongs is an FD-MIMO eNB. Where the non-FD-MIMO eNB may be a legacy LTE base station.
Here, the DRS includes at least CSI-RS; the DRS may include a CRS in addition to a CSI-RS; as can be seen, the CRS may be information configured by the network side device together with the CSI-RS when configuring the DRS. When the network side device configures the CSI-RS in the DRS, the CRS may not be configured; then, the network side device individually configures CRS for each cell of the terminal.
Step S102, the terminal compares the channel quality of the serving cell with the channel quality of the adjacent cell by using the measurement information of the serving cell and the measurement information of the adjacent cell to obtain a comparison result;
here, the comparison result is used to indicate the degree of goodness between the channel quality of the serving cell and the channel quality of the neighboring cell, and the comparison result includes a result that the channel quality of the serving cell is better than or equal to the channel quality of the neighboring cell and a result that the channel quality of the serving cell is worse than the channel quality of the neighboring cell.
When the channel quality is measured by using Reference Signal Received Power (RSRP), the RSRP of the serving cell and the RSRP of the neighboring cell are compared in step S102 to obtain a comparison result.
In a specific implementation, the RSRP may include RSRP based on various Reference channels, for example, RSRP based on Channel State Indication Reference Signals (CSI-RS) (denoted as CSI-RS _ RSRP), and then RSRP based on CRS (denoted as CRS _ RSRP).
Step S103, when the comparison result shows that the channel quality of the neighboring cell is better than the channel quality of the serving cell, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device.
Here, the terminal may also carry the measurement information of the neighboring cell and/or the measurement information of the serving cell in a cell handover request, and then the terminal sends the cell handover request to a network side device (e.g., a base station of the serving cell), where the cell handover request is used to request the base station to perform handover on a cell (cell) where the terminal is located.
When the reference signal includes CSI-RS and CRS, and the serving cell and the neighboring cell are respectively FD-MIMO eNB and non-FD-MIMO eNB, or non-FD-MIMO eNB and FD-MIMO eNB, the embodiment of the present invention defines two co-frequency measurement events, where the two co-frequency measurement events Event D1 and Event D2 actually provide a channel quality of the neighboring cell in comparison to whether the channel quality of the serving cell is better, when the channel quality of the neighboring cell is better than the channel quality of the serving cell, the terminal may send the measured channel information to the network side device, and then the network side device determines whether to switch the cell of the terminal.
Event D1: the channel quality of the adjacent cell measured based on the CSI-RS is better than the sum of the channel quality of the serving cell measured based on the CRS and the first deviation value, and the channel quality of the adjacent cell measured based on the CRS is better than the sum of the channel quality of the serving cell measured based on the CRS and the second deviation value; expressed as follows using equations (1) and (2):
CSI-RS_RSRPFD-MIMO_eNB>(CRS_RSRPLegacy_eNB+Offset1) (1)；
CRS_RSRPFD-MIMO_eNB>(CRS_RSRPLegacy_eNB+Offset2) (2)；
wherein Offset1 represents the first Offset value, Offset2 represents the second Offset value, CSI-RS _ RSRPFD-MIMO_eNBIndicating the channel quality of the neighbor cell based on CSI-RS measurement, CRS _ RSRPLegacy_eNBCRS measurement based channel quality, CRS _ RSRP, representing serving cellFD-MIMO_eNBIndicates the CRS-based measured channel quality of the neighbor cell.
Event D2: the channel quality of the adjacent cell measured based on the CRS is better than the sum of the channel quality of the serving cell measured based on the CSI-RS and the third deviation value, and the channel quality of the adjacent cell measured based on the CRS is better than the sum of the fourth deviation value of the channel quality of the serving cell measured based on the CRS. Expressed as follows using equations (3) and (4):
CRS_RSRPLegacy_eNB>(CSI-RS_RSRPFD-MIMO_eNB+Offset3) (3)；
CRS_RSRPLegacy_Enb>(CRS_RSRPFD-MIMO_eNB+Offset4) (4)；
wherein Offset3 represents the first Offset value, Offset4 represents the second Offset value, CRS _ RSRPLegacy_eNBCRS measurement based channel quality, CSI-RS RSRP, representing neighbor cellsFD-MIMO_eNBIndicating a channel quality of a serving cell based on CSI-RS measurement; CRS _ RSRPFD-MIMO_eNBIndicates the channel quality of the serving cell based on the CRS measurement.
The first deviation value and the third deviation value can be the same or different, and the first deviation value and the third deviation value are greater than or equal to 0; the second offset value and the fourth offset value may be the same or different, and may be positive, 0, or negative.
In the embodiment of the invention, a terminal measures a serving cell and an adjacent cell by using a cell discovery reference signal DRS configured for the terminal by network side equipment to respectively obtain measurement information of the serving cell and measurement information of the adjacent cell; the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, wherein the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO base station (eNB) or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB; the terminal compares the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment; therefore, under the scene that an FD-MIMO eNB and a traditional eNB exist in the network, the network performance can be optimized, and the user experience is improved.
Example two
The embodiment of the invention provides a channel information reporting method, which is applied to a terminal, wherein the functions realized by the method can be realized by calling a program code through a processor in the terminal, and the program code can be saved in a computer storage medium.
In the embodiment of the invention, the type of the base station to which the serving cell belongs is different from the type of the base station to which the neighboring cell belongs, the base station to which the serving cell belongs is a non-FD-MIMO eNB, and the base station to which the neighboring cell belongs is an FD-MIMO eNB.
In the embodiment of the invention, the DRS comprises a plurality of channel state indication reference signals CSI-RS and CRSs, each CSI-RS corresponds to one vertical dimension service wave beam of the FD-MIMO eNB, and different CSI-RSs correspond to different vertical dimension wave beam directions.
Fig. 2 is a schematic diagram of an implementation flow of a channel information reporting method according to an embodiment of the present invention, and as shown in fig. 2, the channel information reporting method includes:
step S201, when a base station to which a neighboring cell belongs is an FD-MIMO eNB, the terminal correspondingly obtains the CSI-RS-based RSRP of a plurality of vertical dimension service beams in the FD-MIMO eNB by measuring a plurality of CSI-RSs configured for the terminal by network side equipment;
step S202, the terminal determines a first CSI-RS-based RSRP from the CSI-RS-based RSRPs of a plurality of vertical dimension service beams in the FD-MIMO eNB according to a preset first rule;
wherein the first CSI-RS based RSRP is used to represent a channel quality of a traffic channel of a neighbor cell or a serving cell;
here, the first rule is set by a person skilled in the art to determine a CSI-RS _ RSRP from a plurality of CSI-RS-based RSRPs for representing the channel quality of a traffic channel of a neighboring cell, for example, in the process of implementation, the first rule may be the one with the largest CSI-RS _ RSRP.
Step S203, the terminal correspondingly obtains the RSRP of the serving cell based on the CRS by measuring the CRS of the serving cell;
step S204, the terminal compares the first CSI-RS-based RSRP of the adjacent cell with the sum of the CRS-based RSRP of the serving cell and a preset first deviation value to obtain a first sub-comparison result;
wherein the first deviation value is an integer greater than or equal to 0.
Step S205, when the first sub-comparison result indicates that the first CSI-RS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset first offset value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device.
EXAMPLE III
The embodiment of the invention provides a channel information reporting method, which is applied to a terminal, wherein the functions realized by the method can be realized by calling a program code through a processor in the terminal, and the program code can be saved in a computer storage medium.
In the embodiment of the invention, the type of the base station to which the serving cell belongs is different from the type of the base station to which the neighboring cell belongs, the base station to which the serving cell belongs is an FD-MIMO eNB, and the base station to which the neighboring cell belongs is a non-FD-MIMO eNB.
In the embodiment of the invention, the DRS comprises a plurality of channel state indication reference signals CSI-RS and CRSs, each CSI-RS corresponds to one vertical dimension service wave beam of the FD-MIMO eNB, and different CSI-RSs correspond to different vertical dimension wave beam directions.
The implementation process of the channel information reporting method provided by the embodiment of the invention comprises the following steps:
step S301, when a base station to which a serving cell belongs is an FD-MIMO eNB, the terminal correspondingly obtains the CSI-RS-based RSRP of a plurality of vertical-dimension service beams in the FD-MIMO eNB by measuring a plurality of CSI-RSs configured for the terminal by network side equipment;
step S302, the terminal determines a first CSI-RS-based RSRP from CSI-RS-based RSRPs of a plurality of vertical dimension service beams in an FD-MIMO eNB according to a preset first rule, wherein the first CSI-RS-based RSRP is used for representing the channel quality of a service channel of a neighboring cell or a serving cell;
here, the first rule is set by a person skilled in the art to determine a CSI-RS _ RSRP from a plurality of CSI-RS-based RSRPs for representing the channel quality of the data channel of the neighboring cell, for example, in the process of implementation, the first rule may be the one with the largest CSI-RS _ RSRP.
Step S303, the terminal correspondingly obtains the CRS-based RSRP of the neighboring cell by measuring the CRS of the neighboring cell;
step S304, the terminal compares the RSRP of the adjacent cell based on the CRS with the sum of the first RSRP of the serving cell based on the CSI-RS and a preset third deviation value to obtain a third sub-comparison result;
wherein the third deviation value is an integer greater than or equal to 0.
Step S305, when the third sub-comparison result indicates a sum of the CRS-based RSRP of the neighboring cell, the first CSI-RS-based RSRP of the serving cell, and a preset third deviation value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device.
Example four
The embodiment of the invention provides a channel information reporting method, which is applied to a terminal, wherein the functions realized by the method can be realized by calling a program code through a processor in the terminal, and the program code can be saved in a computer storage medium.
In the embodiment of the invention, the type of the base station to which the serving cell belongs is different from the type of the base station to which the neighboring cell belongs, the base station to which the serving cell belongs is a non-FD-MIMO eNB, and the base station to which the neighboring cell belongs is an FD-MIMO eNB.
In the embodiment of the invention, the DRS comprises a plurality of channel state indication reference signals CSI-RS and CRSs, each CSI-RS corresponds to one vertical dimension service wave beam of the FD-MIMO eNB, and different CSI-RSs correspond to different vertical dimension wave beam directions.
The implementation process of the channel information reporting method provided by the embodiment of the invention comprises the following steps:
step S401, when a base station to which an adjacent cell belongs is an FD-MIMO eNB, the terminal correspondingly obtains the CSI-RS-based RSRP of a plurality of vertical dimension service beams in the FD-MIMO eNB by measuring a plurality of CSI-RSs configured for the terminal by network side equipment;
step S402, the terminal determines a first CSI-RS-based RSRP from CSI-RS-based RSRPs of a plurality of vertical dimension service beams in an FD-MIMO eNB according to a preset first rule, wherein the first CSI-RS-based RSRP is used for representing the channel quality of a service channel of a neighboring cell or a serving cell;
here, the first rule is set by a person skilled in the art to determine a CSI-RS _ RSRP from a plurality of CSI-RS-based RSRPs for representing the channel quality of the data channel of the neighboring cell, for example, in the process of implementation, the first rule may be the one with the largest CSI-RS _ RSRP.
Step S403, the terminal correspondingly obtains the CRS-based RSRP of the neighboring cell or the serving cell by measuring the CRS of the neighboring cell and the CRS of the serving cell;
step S405, the terminal compares the first CSI-RS-based RSRP of the adjacent cell with the sum of the CRS-based RSRP of the serving cell and a preset first deviation value to obtain a first sub-comparison result;
step S406, when the first sub-comparison result indicates that the first CSI-RS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset first deviation value, the terminal compares the sum of the CRS-based RSRP of the serving cell and a preset second deviation value with the CRS-based RSRP of the neighboring cell to obtain a second sub-comparison result;
step S407, when the second sub-comparison result indicates that the CRS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset second offset value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device;
wherein: the second deviation value is a positive or negative number.
EXAMPLE five
The embodiment of the invention provides a channel information reporting method, which is applied to a terminal, wherein the functions realized by the method can be realized by calling a program code through a processor in the terminal, and the program code can be saved in a computer storage medium.
In the embodiment of the invention, the type of the base station to which the serving cell belongs is different from the type of the base station to which the neighboring cell belongs, the base station to which the serving cell belongs is an FD-MIMO eNB, and the base station to which the neighboring cell belongs is a non-FD-MIMO eNB.
In the embodiment of the invention, the DRS comprises a plurality of CSI-RSs and CRSs, each CSI-RS corresponds to one vertical dimension service beam of the FD-MIMO eNB, and different CSI-RSs correspond to different vertical dimension beam directions.
The implementation process of the channel information reporting method provided by the embodiment of the invention comprises the following steps:
step S501, when a base station to which a serving cell belongs is an FD-MIMO eNB, the terminal correspondingly obtains the CSI-RS-based RSRP of a plurality of vertical-dimension service beams in the FD-MIMO eNB by measuring a plurality of CSI-RSs configured for the terminal by network side equipment;
step S502, the terminal determines a first CSI-RS-based RSRP from CSI-RS-based RSRPs of a plurality of vertical dimension service beams in an FD-MIMO eNB according to a preset first rule, wherein the first CSI-RS-based RSRP is used for representing the channel quality of a service channel of a neighboring cell or a serving cell;
here, the first rule is set by a person skilled in the art to determine a CSI-RS _ RSRP from a plurality of CSI-RS-based RSRPs for representing the channel quality of the data channel of the neighboring cell, for example, in the process of implementation, the first rule may be the one with the largest CSI-RS _ RSRP.
Step S503, the terminal correspondingly obtains the CRS-based RSRP of the neighboring cell or the serving cell by measuring the CRS of the neighboring cell and the CRS of the serving cell;
step S504, the terminal compares the RSRP of the adjacent cell based on the CRS with the sum of the first RSRP of the serving cell based on the CSI-RS and the third deviation value to obtain a third sub-comparison result;
here, the third deviation value is a positive number equal to or greater than 0.
Step S505, when the third sub-comparison result indicates that the CRS-based RSRP of the neighboring cell is greater than the sum of the first CSI-RS-based RSRP of the serving cell and a preset third deviation value, the terminal compares the sum of the CRS-based RSRP of the serving cell and a preset fourth deviation value with the CRS-based RSRP of the neighboring cell to obtain a fourth sub-comparison result;
step S506, when the fourth sub-comparison result indicates that the CRS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset fourth offset value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device;
wherein: the fourth deviation value is a positive or negative number.
EXAMPLE six
The embodiment of the invention provides a Channel information reporting method, fig. 3 is a scene schematic diagram of a sixth embodiment of the invention, and with reference to fig. 3, a serving cell of a UE is a traditional eNB, an adjacent cell is an FD-MIMO eNB, a network side configures a cell Discovery reference signal (Discovery RS) for the UE, the DRS is configured with a plurality of Channel state indication reference signals (CSI-RS), each CSI-RS corresponds to a typical vertical dimension service beam of the FD-MIMO eNB, i.e., a beamformed CSI-RS, different CSI-RSs correspond to different vertical dimension beam directions, and the UE can obtain Channel quality of a service Channel of the FD-MIMO adjacent cell by measuring these CSI-RS resources.
The UE measures the RSRP based on the CSI-RS of the adjacent cell in the DRS, and the optimal RSRP based on the CSI-RS represents the quality of a service channel of the adjacent cell; the UE measures the RSRP of the adjacent cell based on the CRS of the adjacent cell; the UE measures a CRS-based RSRP of the serving cell based on the CRS of the serving cell.
If the measurement result meets Event D1, that is, the channel quality of the neighbor cell measured based on the CSI-RS is better than the sum of the channel quality of the serving cell measured based on the CRS and the first deviation value, and the channel quality of the neighbor cell measured based on the CRS is better than the sum of the channel quality of the serving cell measured based on the CRS and the second deviation value (the second deviation value may be positive, negative, and 0), the UE reports the measurement information to the network side, where the measurement information includes the CSI-RS based RSRP of the neighbor cell, the CRS based RSRP of the neighbor cell, and the CRS based RSRP of the serving cell.
EXAMPLE seven
The embodiment of the invention provides a channel information reporting method, and fig. 4 is a scene schematic diagram of a seventh embodiment of the invention, in combination with fig. 4, a serving cell of a UE is an FD-MIMO eNB, an adjacent cell is a traditional eNB, a network side configures a plurality of CSI-RSs for the UE, each CSI-RS corresponds to a typical vertical-dimension service beam of the FD-MIMO eNB, i.e., a beamformed CSI-RS, different CSI-RS resources correspond to different vertical-dimension beam directions, and the UE can obtain channel quality of a service channel of the serving cell (FD-MIMO) by measuring the CSI-RS resources.
The UE measures the RSRP based on the CSI-RS of the serving cell based on the CSI-RS resource of the serving cell, and the optimal RSRP based on the CSI-RS is used for representing the channel quality of a traffic channel of the serving cell; the UE measures the RSRP of the adjacent cell based on the CRS of the adjacent cell; the UE measures a CRS-based RSRP of the serving cell based on the CRS of the serving cell.
If the measurement result meets Event D2, that is, the neighboring cell channel quality measured based on the CRS is better than the sum of the serving cell channel quality measured based on the CSI-RS and the third deviation value, and the neighboring cell channel quality measured based on the CRS is better than the sum of the serving cell channel quality measured based on the CRS and the fourth deviation value (the fourth deviation value may be a negative number, a positive number, and 0), the UE reports the measurement information to the network side, where the measurement information includes the CSI-RS-based RSRP of the serving cell, the CRS-based RSRP of the neighboring cell, and the CRS-based RSRP of the serving cell.
Example eight
Based on the foregoing method embodiment, an embodiment of the present invention provides a terminal, where units such as a measurement unit, a comparison unit, and a sending unit included in the terminal, and modules included in each unit can be implemented by a processor in a base station; of course, the implementation can also be realized through a specific logic circuit; in the course of a particular embodiment, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.
Fig. 5 is a schematic diagram of a composition structure of an eight terminal according to an embodiment of the present invention, and as shown in fig. 5, the terminal 500 includes a measurement unit 501, a comparison unit 502, and a sending unit 503, where:
the measurement unit 501 is configured to measure a serving cell and an adjacent cell by using a cell discovery reference signal DRS configured for the terminal by a network side device, so as to obtain measurement information of the serving cell and measurement information of the adjacent cell respectively;
the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, wherein the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -MIMO base station (eNB) or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB;
the comparing unit 502 is configured to compare the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; triggering the sending unit when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell;
the sending unit 503 is configured to send the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device.
In the embodiment of the invention, the DRS comprises a plurality of channel state indication reference signals (CSI-RSs), each CSI-RS corresponds to one vertical dimension service beam of the FD-MIMO eNB, and different CSI-RSs correspond to different vertical dimension beam directions;
correspondingly, when the base station to which the neighboring cell or the serving cell belongs is the FD-MIMO eNB, the measurement unit is configured to correspondingly obtain the CSI-RS-based reference signal received powers RSRP of the multiple vertical-dimension service beams in the FD-MIMO eNB by measuring the multiple CSI-RSs.
In this embodiment of the present invention, the terminal further includes a determining unit, configured to determine, according to a preset first rule, a first CSI-RS-based RSRP from CSI-RS-based RSRPs of a plurality of vertical-dimension service beams in the FD-mimo enb, where the first CSI-RS-based RSRP is used to represent channel quality of a service channel of a neighboring cell or a serving cell.
In this embodiment of the present invention, the DRS further includes a common reference signal CRS, and the terminal further includes a receiving unit, configured to receive a CRS configured by a network side device for the terminal, and correspondingly, the measuring unit is further configured to correspondingly obtain a CRS based on the CRS of the neighboring cell or the serving cell by measuring the CRS of the neighboring cell and the CRS of the serving cell.
In the embodiment of the present invention, when the base station to which the neighboring cell belongs is an FD-MIMO eNB and the base station to which the serving cell belongs is a non-FD-MIMO eNB, the comparing unit includes a first comparing module, configured to compare a first CSI-RS-based RSRP of the neighboring cell with a sum of a CRS-based RSRP of the serving cell and a preset first offset value, to obtain a first sub-comparison result; triggering the sending unit when the first sub-comparison result shows that the first CSI-RS-based RSRP of the neighboring cell is larger than the sum of the CRS-based RSRP of the serving cell and a preset first deviation value;
wherein: the first deviation value is a value greater than or equal to 0.
In this embodiment of the present invention, the comparing unit further includes a second comparing module, configured to, when the first sub-comparison result indicates that the first CSI-RS-based RSRP of the neighboring cell is greater than a sum of the CRS-based RSRP of the serving cell and a preset first deviation value, compare a magnitude between the sum of the CRS-based RSRP of the serving cell and a preset second deviation value and the CRS-based RSRP of the neighboring cell to obtain a second sub-comparison result; triggering the sending unit when the second sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset second deviation value;
wherein: the second deviation value is a positive or negative number.
In this embodiment of the present invention, when the base station to which the serving cell belongs is an FD-MIMO eNB, and correspondingly, the base station to which the neighboring cell belongs is a non-FD-MIMO eNB, the comparing unit further includes a third comparing module, configured to compare a CRS-based RSRP of the neighboring cell with a sum of a first CSI-RS-based RSRP of the serving cell and a third deviation value, to obtain a third sub-comparison result; triggering the sending unit when the third sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the first RSRP based on the CSI-RS of the serving cell and a preset third deviation value;
wherein: the third deviation value is a value greater than or equal to 0.
In this embodiment of the present invention, the comparing unit further includes a fourth comparing module, configured to, when the third sub-comparison result indicates that the CRS-based RSRP of the neighboring cell is greater than a sum of the first CSI-RS-based RSRP of the serving cell and a preset third deviation value, compare a magnitude between the sum of the CRS-based RSRP of the serving cell and a preset fourth deviation value and the CRS-based RSRP of the neighboring cell to obtain a fourth sub-comparison result; when the fourth sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset fourth deviation value, triggering the sending unit;
wherein: the fourth deviation value is a positive or negative number.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated unit of the present invention may 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 a separate 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, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, 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 removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (14)

1. A method for reporting channel information is characterized in that the method comprises the following steps:
a terminal measures a serving cell and an adjacent cell by using a cell Discovery Reference Signal (DRS) configured for the terminal by network side equipment, and respectively obtains measurement information of the serving cell and measurement information of the adjacent cell;
the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -multiple-output (MIMO) base station eNB or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB;
the terminal compares the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result;
when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment;
the DRS comprises a plurality of channel state indication reference signals (CSI-RSs), each CSI-RS corresponds to one vertical dimension service beam of the FD-MIMOeNB, and different CSI-RSs correspond to different vertical dimension beam directions;
correspondingly, when the base station to which the neighboring cell or the serving cell belongs is an FD-MIMO eNB, measuring the serving cell or the neighboring cell by using a cell discovery reference signal DRS configured for the terminal by a network side device, and obtaining measurement information of the serving cell or the neighboring cell, respectively, includes: and the terminal correspondingly obtains the reference signal received power RSRP based on the CSI-RS of a plurality of vertical dimension service beams in the FD-MIMO eNB by measuring the plurality of CSI-RSs.
2. The method of claim 1, further comprising:
the terminal determines a first CSI-RS-based RSRP from the CSI-RS-based RSRPs of a plurality of vertical dimension service beams in the FD-MIMO eNB according to a preset first rule, wherein the first CSI-RS-based RSRP is used for representing the channel quality of a service channel of a neighboring cell or a serving cell.
3. The method of claim 2, wherein the DRS further includes a common reference signal CRS, or the terminal receives a CRS configured by the network-side device for the terminal, and correspondingly, the terminal measures a serving cell and a neighboring cell by using a cell discovery reference signal DRS configured by the network-side device for the terminal to obtain measurement information of the serving cell and measurement information of the neighboring cell, respectively, including:
and the terminal correspondingly obtains the CRS-based RSRP of the adjacent cell or the serving cell by measuring the CRS of the adjacent cell and the CRS of the serving cell.
4. The method of claim 3, wherein when the base station to which the neighboring cell belongs is an FD-MIMO eNB and the base station to which the serving cell belongs is a non-FD-MIMO eNB, the terminal compares the channel quality of the serving cell and the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result, and the comparison result comprises:
the terminal compares the first CSI-RS-based RSRP of the adjacent cell with the sum of the CRS-based RSRP of the serving cell and a preset first deviation value to obtain a first sub-comparison result;
correspondingly, when the first sub-comparison result shows that the first CSI-RS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset first deviation value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment;
wherein: the first deviation value is a value greater than or equal to 0.
5. The method according to claim 4, wherein before the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device, the method further includes: when the first sub-comparison result shows that the first CSI-RS-based RSRP of the neighboring cell is larger than the sum of the CRS-based RSRP of the serving cell and a preset first deviation value, the terminal compares the sum of the CRS-based RSRP of the serving cell and a preset second deviation value with the RSRP of the neighboring cell to obtain a second sub-comparison result;
when the second sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset second deviation value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment;
wherein: the second deviation value is a positive or negative number.
6. The method of claim 3, wherein when the base station to which the serving cell belongs is an FD-MIMO eNB and correspondingly the base station to which the neighboring cell belongs is a non-FD-MIMO eNB, the terminal compares the channel quality of the serving cell and the channel quality of the neighboring cell by using the channel information of the serving cell and the channel information of the neighboring cell to obtain a comparison result, and the comparison result comprises:
the terminal compares the RSRP based on the CRS of the adjacent cell with the sum of the first RSRP based on the CSI-RS of the serving cell and a third deviation value to obtain a third sub-comparison result;
correspondingly, when the third sub-comparison result shows that the CRS-based RSRP of the neighboring cell is greater than the sum of the first CSI-RS-based RSRP of the serving cell and a preset third deviation value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device;
wherein: the third deviation value is a value greater than or equal to 0.
7. The method according to claim 6, wherein before the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device, the method further includes: when the third sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is larger than the sum of the first RSRP based on the CSI-RS of the serving cell and a preset third deviation value, the terminal compares the sum of the RSRP based on the CRS of the serving cell and a preset fourth deviation value with the RSRP based on the CRS of the neighboring cell to obtain a fourth sub-comparison result;
when the fourth sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset fourth deviation value, the terminal sends the measurement information of the neighboring cell and/or the measurement information of the serving cell to network side equipment;
wherein: the fourth deviation value is a positive or negative number.
8. A terminal, characterized in that the terminal comprises a measuring unit, a comparing unit and a transmitting unit, wherein:
the measurement unit is configured to measure a serving cell and a neighboring cell by using a cell discovery reference signal DRS configured for the terminal by a network side device, and obtain measurement information of the serving cell and measurement information of the neighboring cell respectively;
the type of a base station to which a serving cell belongs is different from the type of a base station to which an adjacent cell belongs, the base station to which the serving cell belongs is a full-dimensional multiple-input multiple-output (FD) -multiple-output (MIMO) base station eNB or a non-FD-MIMO eNB, and correspondingly, the base station to which the adjacent cell belongs is the non-FD-MIMO eNB or the FD-MIMO eNB;
the comparing unit is used for comparing the channel quality of the serving cell with the channel quality of the neighboring cell by using the measurement information of the serving cell and the measurement information of the neighboring cell to obtain a comparison result; triggering the sending unit when the comparison result shows that the channel quality of the neighboring cell is superior to the channel quality of the serving cell;
the sending unit is configured to send the measurement information of the neighboring cell and/or the measurement information of the serving cell to a network side device;
the DRS comprises a plurality of channel state indication reference signals (CSI-RSs), each CSI-RS corresponds to one vertical dimension service beam of the FD-MIMOeNB, and different CSI-RSs correspond to different vertical dimension beam directions;
correspondingly, when the base station to which the neighboring cell or the serving cell belongs is the FD-MIMO eNB, the measurement unit is configured to correspondingly obtain the CSI-RS-based reference signal received powers RSRP of the multiple vertical-dimension service beams in the FD-MIMO eNB by measuring the multiple CSI-RSs.
9. The terminal of claim 8, further comprising a determining unit configured to determine a first CSI-RS based RSRP from CSI-RS based RSRPs of several vertical-dimension traffic beams in the FD-MIMO eNB according to a preset first rule, wherein the first CSI-RS based RSRP is used to represent channel quality of a traffic channel of a neighboring cell or a serving cell.
10. The terminal of claim 9, wherein the DRS further includes a common reference signal CRS, and wherein the terminal further includes a receiving unit, configured to receive a CRS configured by a network side device for the terminal, and correspondingly, the measuring unit is further configured to correspondingly obtain a CRS-based RSRP of a neighboring cell or a serving cell by measuring the CRS of the neighboring cell and the CRS of the serving cell.
11. The terminal of claim 10, wherein when the base station to which the neighboring cell belongs is an FD-MIMO eNB and the base station to which the serving cell belongs is a non-FD-MIMO eNB, the comparing unit comprises a first comparing module configured to compare a first CSI-RS-based RSRP of the neighboring cell with a sum of a CRS-based RSRP of the serving cell and a preset first offset value to obtain a first sub-comparison result; triggering the sending unit when the first sub-comparison result shows that the first CSI-RS-based RSRP of the neighboring cell is larger than the sum of the CRS-based RSRP of the serving cell and a preset first deviation value;
wherein: the first deviation value is a value greater than or equal to 0.
12. The terminal of claim 11, wherein the comparing unit further comprises a second comparing module, configured to compare a magnitude between a sum of the CRS-based RSRP of the serving cell and a preset second bias value and the CRS-based RSRP of the neighboring cell to obtain a second sub-comparison result, when the first sub-comparison result indicates that the first CSI-RS-based RSRP of the neighboring cell is greater than the sum of the CRS-based RSRP of the serving cell and a preset first bias value; triggering the sending unit when the second sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset second deviation value;
wherein: the second deviation value is a positive or negative number.
13. The terminal of claim 10, wherein when the base station to which the serving cell belongs is an FD-MIMO eNB and correspondingly the base station to which the neighboring cell belongs is a non-FD-MIMO eNB, the comparing unit further comprises a third comparing module for comparing a magnitude between the CRS-based RSRP of the neighboring cell and a sum of a first CSI-RS-based RSRP of the serving cell and a third deviation value to obtain a third sub-comparison result; triggering the sending unit when the third sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the first RSRP based on the CSI-RS of the serving cell and a preset third deviation value;
wherein: the third deviation value is a value greater than or equal to 0.
14. The terminal of claim 13, wherein the comparing unit further comprises a fourth comparing module, configured to compare a magnitude between a sum of the CRS-based RSRP of the serving cell and a preset fourth bias value and the CRS-based RSRP of the neighboring cell when the third sub-comparison result indicates that the CRS-based RSRP of the neighboring cell is greater than a sum of the first CSI-RS-based RSRP of the serving cell and a preset third bias value, resulting in a fourth sub-comparison result; when the fourth sub-comparison result shows that the RSRP based on the CRS of the neighboring cell is greater than the sum of the RSRP based on the CRS of the serving cell and a preset fourth deviation value, triggering the sending unit;
wherein: the fourth deviation value is a positive or negative number.
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