CN106561007B - Data transmission method, related device and base station - Google Patents
Data transmission method, related device and base station Download PDFInfo
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- CN106561007B CN106561007B CN201510641371.2A CN201510641371A CN106561007B CN 106561007 B CN106561007 B CN 106561007B CN 201510641371 A CN201510641371 A CN 201510641371A CN 106561007 B CN106561007 B CN 106561007B
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- 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
Abstract
The embodiment of the invention discloses a data transmission method which is used for improving the performance of an MIMO system. The method provided by the embodiment of the invention comprises the following steps: the base station determines a first signal power from a first transmitting port to the first UE and a second signal power from a second transmitting port to the first UE; and if the first signal power and the second signal power meet the first preset condition, the base station transmits the user data of the first UE by using the first transmitting port, and does not use the second transmitting port to transmit the data to the first UE any more. The embodiment of the invention also provides a related data transmission device.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a data transmission method, a related apparatus, and a base station.
Background
Multiple Input Multiple Output (MIMO) technology is one of the fundamental technologies of modern communications. The transmitting terminal and the receiving terminal are respectively provided with a plurality of transmitting antennas and receiving antennas, so that signals are transmitted and received through the transmitting terminal and the plurality of antennas of the receiving terminal, and the communication quality is improved.
A Distributed Antenna System (DAS) is a network of multiple antennas Distributed within a building and dedicated to providing wireless indoor coverage. The existing technology combines the DAS and the MIMO technology, single-user MIMO is realized by deploying two-way DAS, and further indoor network MIMO coverage is realized. The DAS of each path may be regarded as one transmit antenna port.
However, because the two DASs are not centralized together, a phenomenon that power of different transmitting antenna ports received by a user is severely unbalanced occurs in the MIMO system, so that channel quality between the antenna ports and the user is poor, the user cannot correctly perform high-rank and high-order transmission based on received data signals, and transmission performance of the system is low.
Disclosure of Invention
The embodiment of the invention provides a data transmission method which is used for improving the performance of an MIMO system.
A first aspect of an embodiment of the present invention provides a data transmission method, which is applicable to a multiple-input multiple-output MIMO system, where the MIMO system includes a base station and a first user equipment UE, the base station includes a first transmit port and a second transmit port, and the method includes:
the base station respectively determines a first signal power from the first transmitting port to the first UE and a second signal power from the second transmitting port to the first UE;
if the first signal power and the second signal power meet a first preset condition, the base station selects a first transmission port from the first transmission port and the second transmission port to transmit user data of the first UE.
With reference to the first aspect of the embodiment of the present invention, in a first implementation manner of the first aspect of the embodiment of the present invention, the first preset condition includes: the second signal power is less than a first preset threshold; or, a difference between the first signal power and the second signal power is greater than a second preset threshold, where the first preset threshold and the second preset threshold are positive values.
With reference to the first aspect of the embodiment of the present invention or the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the embodiment of the present invention, the determining, by the base station, a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE respectively includes:
the base station respectively carries out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and the base station respectively calculates the first signal power from the first transmitting port to the first UE and the second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
With reference to the first aspect of the embodiment of the present invention, the first or second implementation manner of the first aspect, in a third implementation manner of the first aspect of the embodiment of the present invention, the MIMO system further includes a second UE, and the method further includes:
the base station respectively determines a third signal power from the first transmission port to the second UE and a fourth signal power from the second transmission port to the second UE;
if the first signal power and the second signal power satisfy a first preset condition, the selecting, by the base station, a first transmission port from the first transmission port and the second transmission port to transmit the user data of the first UE includes:
if the first signal power and the second signal power satisfy a first preset condition, and the third signal power and the fourth signal power satisfy a second preset condition, the base station pair-transmits user data of the first UE and the second UE on the first transmission port and the second transmission port, wherein the base station selects the first transmission port to transmit the user data of the first UE, and selects the second transmission port to transmit the user data of the second UE, and the second preset condition includes: the third signal power is smaller than a third preset threshold, or the difference between the fourth signal power and the third signal power is larger than a fourth preset threshold, and the third preset threshold and the fourth preset threshold are positive values.
With reference to the first aspect of the present invention, or any one of the first to third implementation manners of the first aspect, in a fourth implementation manner of the first aspect of the present invention, after the selecting, by the base station, a first transmission port from the first transmission port and the second transmission port to transmit the user data of the first UE, the method further includes:
the base station receives, at the first transmission port, signal-to-interference-plus-noise ratio (SINR) information reported by the first UE, wherein the SINR information is estimated by the first UE through a cell-specific reference signal (CRS);
if the SINR is greater than the difference between the first signal power and the second signal power, the base station corrects the SINR to the difference between the first signal power and the second signal power.
A second aspect of the embodiments of the present invention provides a data transmission apparatus, which is suitable for a base station in a multiple-input multiple-output MIMO system, where the MIMO system further includes a first user equipment UE, the base station includes a first transmit port and a second transmit port, and the apparatus includes:
a power determining module, configured to determine a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE, respectively;
and a data allocation module, configured to select a first transmission port from the first transmission port and the second transmission port to transmit the user data of the first UE when the first signal power and the second signal power meet a first preset condition.
With reference to the second aspect of the embodiment of the present invention, in a first implementation manner of the second aspect of the embodiment of the present invention, the first preset condition includes: the second signal power is less than a first preset threshold; or, a difference between the first signal power and the second signal power is greater than a second preset threshold, where the first preset threshold and the second preset threshold are positive values.
With reference to the second aspect of the embodiment of the present invention or the first implementation manner of the second aspect, in a second implementation manner of the second aspect of the embodiment of the present invention, the power determining module is specifically configured to:
respectively carrying out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and respectively calculating first signal power from the first transmitting port to the first UE and second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
With reference to the second aspect of the present embodiment and the first or second implementation manner of the second aspect, in a third implementation manner of the second aspect of the present embodiment, the MIMO system further includes a second UE;
the power determination module is further to: determining a third signal power of the first transmission port to the second UE and a fourth signal power of the second transmission port to the second UE, respectively;
the data distribution module is specifically configured to: if the first signal power and the second signal power satisfy a first preset condition, and the third signal power and the fourth signal power satisfy a second preset condition, transmitting user data of the first UE and the second UE in a pairing manner on the first transmission port and the second transmission port, wherein the data allocation module selects the first transmission port to transmit the user data of the first UE, and selects the second transmission port to transmit the user data of the second UE, and the second preset condition includes: the third signal power is smaller than a third preset threshold, or the difference between the fourth signal power and the third signal power is larger than a fourth preset threshold, and the third preset threshold and the fourth preset threshold are positive values.
With reference to the second aspect of the embodiment of the present invention, and any one of the first to third implementation manners of the second aspect, in a fourth implementation manner of the second aspect of the embodiment of the present invention, the apparatus further includes:
a data receiving module, configured to receive, at the first transmit port, SINR information of a signal-to-interference-plus-noise ratio (SINR) reported by the first UE, where the SINR information is estimated by the first UE through a cell-specific reference signal (CRS);
and the data correction module is used for correcting the SINR to be the difference value between the first signal power and the second signal power when the SINR is larger than the difference value between the first signal power and the second signal power.
In the embodiment of the invention, a base station determines a first signal power from a first transmitting port to a first UE and a second signal power from a second transmitting port to the first UE; and if the first signal power and the second signal power meet the first preset condition, the base station transmits the user data of the first UE by using the first transmitting port, and does not use the second transmitting port to transmit the data to the first UE any more. Compared with the prior art, the base station sends data to the UE at two transmitting ports, but a path of data with weak signals has little help on the demodulation performance of the UE, which is equivalent to being wasted.
Drawings
FIG. 1 is a schematic diagram of a basic architecture of a MIMO system;
FIG. 2 is a flow chart of an embodiment of a method for data transmission according to the present invention;
FIG. 3 is a block diagram of an embodiment of a data transmission apparatus according to the present invention;
fig. 4 is a structural diagram of another embodiment of a data transmission device in an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a data transmission method which is used for improving the performance of an MIMO system. The embodiment of the invention also provides a related data transmission device, which will be described respectively below.
Referring to fig. 1, fig. 1 only takes a rank-2 DAS MIMO system as an example, that is, two DASs are deployed in the system, each DAS is equivalent to one antenna transmission port of the MIMO system, and each User terminal (UE) can demodulate signals of the two transmission ports. As can be seen from fig. 1, the two transmit ports in the system are placed in a distributed manner. Due to the large number of indoor partitions, a part of the signals transmitted by the transmitting ports to some user terminals will generate very obvious transmission loss. For example, at a first UE, the signal power of a first transmit port is stronger and the signal power of a second transmit port is weaker; at the second UE, the signal power of the second transmitting port is stronger, and the signal power of the first transmitting port is weaker; while at the third UE, the power difference of the two transmit ports is not large.
According to a traditional MIMO transmission mode, the UE3 may implement space division multiplexing transmission based on two signals; however, for the UE1 and the UE2, since one path of signal is very weak and cannot perform 2 rank 2 order transmission based on the received data signal, demodulation performance of the UE depends on one path of data with a strong signal to a great extent, and the one path of data with a weak signal has little help to demodulation of the UE, so that one path of data with a weak signal is wasted, and data transmission efficiency of the system is low.
In order to improve the transmission efficiency of the system, an embodiment of the present invention provides a data transmission method based on the MIMO system shown in fig. 1, which is suitable for a base station in the MIMO system, where the base station includes a first transmitting port and a second transmitting port, and a basic flow of the data transmission method refers to fig. 2, where the method includes:
201. respectively determining a first signal power from a first transmitting port to a first UE and a second signal power from a second transmitting port to the first UE;
in this embodiment, the MIMO system shown in fig. 1 includes a base station (not shown in fig. 1) and a first UE, where the base station includes a first transmitting port and a second transmitting port, and the first UE includes at least two receiving ports and is capable of receiving two or more signals. The base station calculates a first signal power from the first transmitting port to the first UE and a second signal power from the second transmitting port to the first UE respectively.
There are many methods for the base station to calculate the signal power from the first transmission port and the second transmission port to the first UE, which will be described in detail in the following embodiments, and the method is not limited herein.
The first Signal Power and the second Signal Power may be Reference Signal Receiving Power (RSRP) from the first transmitting port and the second transmitting port to the first UE, respectively, or may be powers in other forms, which is not limited herein.
In this embodiment, the MIMO system may be used in an indoor scenario, where both the first transmit port and the second transmit port may be DAS. The present embodiment may also be used in other scenarios, and is not limited herein.
202. Judging whether the first signal power and the second signal power meet a first preset condition or not;
the base station judges whether the first signal power and the second signal power meet a first preset condition, wherein the first preset condition is used for determining whether the first signal power is stronger and the second signal power is weaker at the first UE. It can be understood that, if the first signal power and the second signal power satisfy the first preset condition, it indicates that, at the first UE, the first signal power is stronger, the second signal power is weaker, and the first UE can only normally demodulate the signal sent by the first transmit port.
The first preset condition has many forms, such as: the power of the second signal is smaller than a first preset threshold; or, the difference between the first signal power and the second signal power (i.e., the value of the first signal power minus the second signal power) is greater than a second preset threshold. The first preset threshold and the second preset threshold are positive values. The first preset condition may also be other types of conditions, and is not limited herein.
If yes, the base station performs step 203.
203. And selecting the first transmission port to transmit the user data of the first UE from the first transmission port and the second transmission port.
If the first signal power and the second signal power satisfy a first preset condition, that is, the first signal power is stronger and the second signal power is weaker at the first UE, the base station configures the user data of the first UE on the first transmit port, and does not configure the user data of the first UE on the second transmit port, and then the base station transmits the user data of the first UE using the first transmit port.
In the embodiment, a base station determines a first signal power from a first transmitting port to a first UE and a second signal power from a second transmitting port to the first UE; and if the first signal power and the second signal power meet the first preset condition, the base station transmits the user data of the first UE by using the first transmitting port, and does not use the second transmitting port to transmit the data to the first UE any more. Compared with the prior art, the base station sends data to the UE at two transmitting ports, but the UE can only demodulate one path of data with a stronger signal, and one path of data with a weaker signal is wasted, in this embodiment, the base station only uses one path of transmitting port with a better signal and the UE to perform data transmission, which does not cause the waste of one path of data with a weaker signal, and improves the efficiency of data transmission.
In step 201, the base station determines a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE, respectively. The base station may perform channel estimation on channels from the first transmit port and the second transmit port to the first UE, and then calculate the first signal power and the second signal power according to a result of the channel estimation. More specifically, the base station may calculate the first signal power and the second signal power based on a result of the uplink channel response of the first UE and reciprocity of the uplink channel power and the downlink channel power.
It should be noted that, in the embodiment shown in fig. 2, if the first UE performs channel estimation based on Cell-specific Reference Signals (CRS), the base station transmits CRS on all transmission ports because CRS is a Cell-level signal, but the base station only transmits user data on the port performing data transmission with the first transmission port. At this time, a Signal to interference plus Noise Ratio (SINR) obtained by the first UE performing channel estimation based on the CRS may not be consistent with the actual SINR of the first UE. Therefore, if the first UE performs channel estimation based on the CRS, the base station needs to correct the SINR estimated by the first UE, so as to ensure the accuracy of subsequent data transmission between the base station and the first UE. Specifically, since the interference of the first UE mainly comes from the second transmitting port, the SINR of the first UE should not be greater than the difference between the first signal power and the second signal power. Accordingly, the base station may correct the SINR estimated by the first UE to be the difference between the first signal power and the second signal power when the SINR is greater than the difference between the first signal power and the second signal power. The base station may obtain an SINR estimated by the first UE from a Channel Quality Indicator (CQI) reported by the first UE. If the first UE performs Channel estimation based on a Channel state indication Reference Signal (CRS-RS), the base station does not need to correct the SINR estimated by the first UE since the CRS-RS is a user-level Signal.
In the MIMO system, due to the consideration of cost, energy consumption, device size, and the like, the number of transmitting antennas at the base station side is much greater than the number of receiving antennas at the user side, so that the number of receiving antennas in single-user MIMO is limited, and therefore a higher transmission rank cannot be achieved, and the transmission capability of the system is small. In order to improve the transmission capability of the system, if a Multi-User Multiple-Input Multiple-Output (MU-MIMO) technology is adopted, and Multiple users share the same transmission resource, the rank of the unit transmission resource can be improved on the system level, so that the transmission efficiency of the system is improved.
In the embodiment shown in fig. 2, the base station performs data transmission with the first UE through the first transmission port, which is only data transmission with rank 1 for a single user, and cannot fully exert the excellent performance of MIMO. Therefore, optionally, in some embodiments of the present invention, the base station performs data transmission with the first UE through the first transmitting port and also performs data transmission with the second UE through the second transmitting port, so as to implement pairing transmission between the first UE and the second UE. Although the transmission rank is still 1 for the first UE or the second UE, the first UE and the second UE perform data transmission simultaneously, and the transmission rank is 2 on the same time-frequency resource, so that MU-MIMO with rank of 2 is realized, and the transmission spectrum efficiency of the system can be improved. The specific procedure for pairing and transmitting the first UE and the second UE is as follows:
similar to steps 201, 202 in the embodiment shown in fig. 2, the base station may further determine a third signal power from the first transmission port to the second UE and a fourth signal power from the second transmission port to the second UE, and then determine whether the third signal power and the fourth signal power satisfy a second preset condition. And if the first signal power and the second signal power meet the first preset condition and the third signal power and the fourth signal power meet the second preset condition, the base station performs pairing transmission on the data signals of the first UE and the second UE at the first transmitting port and the second transmitting port. Specifically, the base station selects the first transmission port to transmit the user data of the first UE and selects the second transmission port to transmit the user data of the second UE in the first transmission port and the second transmission port. Among them, the second preset condition has many forms, such as: the third signal power is less than a third preset threshold; or, the difference between the fourth signal power and the third signal power (i.e., the value of the fourth signal power minus the third signal power) is greater than a fourth preset threshold. And the third preset threshold and the fourth preset threshold are positive values. The second preset condition may also be other types of conditions, and is not limited herein.
In particular, the first transmit port may be a single transmit port (e.g., a DAS) or a set of multiple transmit ports. For example, if the base station has a plurality of transmission ports, several transmission ports with closer transmission ports may be grouped into one group as the first transmission port, or several transmission ports with closer signal power to the first UE may be grouped into one group as the first transmission port, or several transmission ports may be grouped into one group as the first transmission port by the base station by other methods. Similarly, the second transmitting port may be a single transmitting port or a set of multiple transmitting ports, which is not limited in the embodiment of the present invention.
The embodiments provided in the present invention are mainly directed to UEs receiving unbalanced signals from multiple transmit ports, such as the first UE and the second UE shown in fig. 1. For a UE receiving signals of multiple transmitting ports in a more balanced manner, such as the third UE shown in fig. 1, the existing MIMO transmission mode may still be used to perform spatial division multiplexing transmission through the first transmitting port and the second transmitting port, which is not limited in the embodiment of the present invention.
In order to facilitate understanding of the above embodiments, a specific application scenario of the above embodiments will be described as an example.
Please refer to fig. 1. The base station receives uplink channel response messages of the first UE and the second UE at the first transmitting port and the second transmitting port respectively, and then determines first signal power from the first transmitting port to the first UE, second signal power from the second transmitting port to the first UE, third signal power from the third transmitting port to the second UE, and fourth signal power from the fourth transmitting port to the second UE according to reciprocity of the uplink channel power and the downlink channel power.
The base station determines that the difference between the first signal power and the second signal power is greater than a first preset value, and the difference between the fourth signal power and the third signal power is greater than a third preset value, so that the base station pairs the first UE with the second UE, transmits user data of the first UE at the first transmitting port, and simultaneously transmits user data of the second UE at the second transmitting port.
The base station acquires a first SINR estimated by the first UE from a CQI reported by the first UE, and acquires a second SINR estimated by the second UE from the CQI reported by the second UE, wherein the first SINR is greater than a difference value between first signal power and second signal power, and then the base station corrects the first SINR into the difference value between the first signal power and the second signal power; the second SINR is less than a difference between the fourth signal power and the third signal power, and the base station does not correct the second SINR.
The embodiment of the invention also provides a related data transmission device, which is suitable for the base station in the MIMO system and is used for realizing the embodiment shown in the figure 2. Referring to fig. 3, the basic structure of the present invention includes:
a power determining module 301, configured to determine a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE, respectively;
the data allocating module 302 is configured to select a first transmit port from the first transmit port and the second transmit port to transmit user data of the first UE when the first signal power and the second signal power meet a first preset condition.
In this embodiment, the power determining module 301 determines a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE; if the first signal power and the second signal power satisfy the first preset condition, the data allocation module 302 uses the first transmit port to transmit the user data of the first UE, and does not use the second transmit port to transmit the data to the first UE. Compared with the prior art, the base station sends data to the UE at two transmitting ports, but the UE can only demodulate one path of data with a stronger signal, and one path of data with a weaker signal is wasted, in this embodiment, the base station only uses one path of transmitting port with a better signal and the UE to perform data transmission, which does not cause the waste of one path of data with a weaker signal, and improves the efficiency of data transmission.
Optionally, in some embodiments of the present invention, the first preset condition includes: the power of the second signal is smaller than a first preset threshold; or the difference value between the first signal power and the second signal power is larger than a second preset threshold, wherein the first preset threshold and the second preset threshold are positive values.
Optionally, in some embodiments of the present invention, the power determining module 301 is specifically configured to:
respectively carrying out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and respectively calculating a first signal power from the first transmitting port to the first UE and a second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
Optionally, in some embodiments of the present invention, the power determining module 301 is further configured to: determining a third signal power of the first transmission port to the second UE and a fourth signal power of the second transmission port to the second UE, respectively;
the data distribution module 302 is specifically configured to: and if the first signal power and the second signal power meet a first preset condition and the third signal power and the fourth signal power meet a second preset condition, transmitting user data of the first UE and the second UE in a pairing mode on the first transmitting port and the second transmitting port. Specifically, a first transmission port is selected to transmit user data of the first UE, and a second transmission port is selected to transmit user data of the second UE.
Wherein the second preset condition comprises: the third signal power is less than a third preset threshold, or the difference between the fourth signal power and the third signal power is greater than a fourth preset threshold, wherein the third preset threshold and the fourth preset threshold are positive values. The second preset condition may also be in other forms, and is not limited herein.
Optionally, in some embodiments of the present invention, the data transmission apparatus further includes:
a data receiving module 303, configured to receive, at a first transmit port, SINR information reported by a first UE, where the SINR information is estimated by the first UE through a CRS;
a data correction module 304, configured to correct the SINR to a difference between the first signal power and the second signal power when the SINR is greater than the difference between the first signal power and the second signal power.
The data receiving module 303 and the data correcting module 304 are optional modules, and the data transmission device provided in the embodiment of the present invention may not include these two modules.
In order to facilitate understanding of the above embodiments, a specific application scenario of the above embodiments will be described as an example.
Please refer to fig. 1. The power determining module 301 receives uplink channel response messages of the first UE and the second UE at the first transmitting port and the second transmitting port, respectively, and then determines a first signal power from the first transmitting port to the first UE, a second signal power from the second transmitting port to the first UE, a third signal power from the third transmitting port to the second UE, and a fourth signal power from the fourth transmitting port to the second UE according to reciprocity of the uplink channel power and the downlink channel power.
The difference between the first signal power and the second signal power is greater than a first preset value, and the difference between the fourth signal power and the third signal power is greater than a third preset value, so that the data allocation module 302 pairs the first UE and the second UE, transmits the user data of the first UE at the first transmit port, and transmits the user data of the second UE at the second transmit port.
The first UE and the second UE perform channel estimation based on the CRS, the data receiving module 303 obtains a first SINR estimated by the first UE from the CQI reported by the first UE, and obtains a second SINR estimated by the second UE from the CQI reported by the second UE, where the first SINR is greater than a difference between a first signal power and a second signal power, and then the data correcting module 304 corrects the first SINR to the difference between the first signal power and the second signal power; the second SINR is less than the difference between the fourth signal power and the third signal power, and the data correction module 304 does not correct the second SINR.
In the above, the data transmission apparatus in the embodiment of the present invention is described from the perspective of the unitized functional entity, and in the following, the data transmission apparatus in the embodiment of the present invention is described from the perspective of hardware processing, referring to fig. 4, another embodiment of the data transmission apparatus 400 in the embodiment of the present invention includes:
an input device 401, an output device 402, a processor 403 and a memory 404 (wherein the number of the processors 403 in the data transmission device 400 may be one or more, and one processor 403 is taken as an example in fig. 4). In some embodiments of the present invention, the input device 401, the output device 402, the processor 403 and the memory 404 may be connected by a bus or other means, wherein the connection by the bus is exemplified in fig. 4.
Wherein, by calling the operation instruction stored in the memory 404, the processor 403 is configured to perform the following steps:
respectively determining a first signal power of the first transmission port to the first UE and a second signal power of the second transmission port to the first UE;
and when the first signal power and the second signal power meet a first preset condition, selecting a first transmission port from the first transmission port and the second transmission port to transmit user data of the first UE.
In some embodiments of the invention, the first preset condition comprises: the second signal power is less than a first preset threshold; or, a difference between the first signal power and the second signal power is greater than a second preset threshold, where the first preset threshold and the second preset threshold are positive values.
In some embodiments of the invention, processor 403 is further configured to perform the following steps:
respectively carrying out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and respectively calculating first signal power from the first transmitting port to the first UE and second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
In some embodiments of the invention, processor 403 is further configured to perform the following steps:
determining a third signal power of the first transmission port to the second UE and a fourth signal power of the second transmission port to the second UE, respectively;
if the first signal power and the second signal power satisfy a first preset condition, and the third signal power and the fourth signal power satisfy a second preset condition, transmitting user data of the first UE and the second UE in a pairing manner on the first transmission port and the second transmission port, wherein the data allocation module selects the first transmission port to transmit the user data of the first UE, and selects the second transmission port to transmit the user data of the second UE, and the second preset condition includes: the third signal power is smaller than a third preset threshold, or the difference between the fourth signal power and the third signal power is larger than a fourth preset threshold, and the third preset threshold and the fourth preset threshold are positive values.
In some embodiments of the invention, processor 403 is further configured to perform the following steps:
receiving, at the first transmit port, SINR information of a signal to interference plus noise ratio (SINR) reported by the first UE, where the SINR information is estimated by the first UE through a cell-specific reference signal (CRS);
correcting the SINR to be a difference between the first signal power and the second signal power when the SINR is greater than the difference between the first signal power and the second signal power.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
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, may be located in one place, or may be 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, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes 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 steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A data transmission method is suitable for a multiple-input multiple-output (MIMO) system, the MIMO system comprises a base station and a first User Equipment (UE), the base station comprises a first transmitting port and a second transmitting port, and the method comprises the following steps:
the base station respectively determines a first signal power from the first transmitting port to the first UE and a second signal power from the second transmitting port to the first UE;
if the first signal power and the second signal power meet a first preset condition, the base station selects the first transmission port to transmit user data of the first UE from the first transmission port and the second transmission port, wherein the first preset condition is used for determining whether the first signal power is stronger and the second signal power is weaker at the first UE;
the base station receives, at the first transmission port, signal-to-interference-plus-noise ratio (SINR) information reported by the first UE, wherein the SINR information is estimated by the first UE through a cell-specific reference signal (CRS);
if the SINR is greater than the difference between the first signal power and the second signal power, the base station corrects the SINR to the difference between the first signal power and the second signal power.
2. The data transmission method according to claim 1, wherein the first preset condition comprises: the second signal power is less than a first preset threshold; or, a difference between the first signal power and the second signal power is greater than a second preset threshold, where the first preset threshold and the second preset threshold are positive values.
3. The data transmission method according to claim 2, wherein the base station determines a first signal power from the first transmission port to the first UE and a second signal power from the second transmission port to the first UE respectively comprises:
the base station respectively carries out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and the base station respectively calculates the first signal power from the first transmitting port to the first UE and the second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
4. The data transmission method according to any one of claims 1 to 3, wherein the MIMO system further comprises a second UE, the method further comprising:
the base station respectively determines a third signal power from the first transmission port to the second UE and a fourth signal power from the second transmission port to the second UE;
if the first signal power and the second signal power satisfy a first preset condition, the selecting, by the base station, a first transmission port from the first transmission port and the second transmission port to transmit the user data of the first UE includes:
if the first signal power and the second signal power satisfy a first preset condition, and the third signal power and the fourth signal power satisfy a second preset condition, the base station pair-transmits user data of the first UE and the second UE on the first transmission port and the second transmission port, wherein the base station selects the first transmission port to transmit the user data of the first UE, and selects the second transmission port to transmit the user data of the second UE, and the second preset condition includes: the third signal power is smaller than a third preset threshold, or the difference between the fourth signal power and the third signal power is larger than a fourth preset threshold, and the third preset threshold and the fourth preset threshold are positive values.
5. A data transmission apparatus, adapted to a base station in a MIMO system, wherein the MIMO system further includes a first user equipment UE, and the base station includes a first transmit port and a second transmit port, the apparatus comprising:
a power determining module, configured to determine a first signal power from the first transmit port to the first UE and a second signal power from the second transmit port to the first UE, respectively;
a data allocation module, configured to select the first transmit port to transmit user data of the first UE from the first transmit port and the second transmit port when the first signal power and the second signal power meet a first preset condition, where the first preset condition is used to determine whether the first signal power is stronger and the second signal power is weaker at the first UE;
a data receiving module, configured to receive, at the first transmit port, SINR information of a signal-to-interference-plus-noise ratio (SINR) reported by the first UE, where the SINR information is estimated by the first UE through a cell-specific reference signal (CRS);
and the data correction module is used for correcting the SINR to be the difference value between the first signal power and the second signal power when the SINR is larger than the difference value between the first signal power and the second signal power.
6. The data transmission apparatus according to claim 5, wherein the first preset condition comprises: the second signal power is less than a first preset threshold; or, a difference between the first signal power and the second signal power is greater than a second preset threshold, where the first preset threshold and the second preset threshold are positive values.
7. The data transmission apparatus according to claim 6, wherein the power determining module is specifically configured to:
respectively carrying out channel estimation on channels from the first transmitting port and the second transmitting port to the first UE;
and respectively calculating first signal power from the first transmitting port to the first UE and second signal power from the second transmitting port to the first UE according to the result of the channel estimation.
8. The data transmission apparatus according to any one of claims 5 to 7, wherein the MIMO system further comprises a second UE;
the power determination module is further to: determining a third signal power of the first transmission port to the second UE and a fourth signal power of the second transmission port to the second UE, respectively;
the data distribution module is specifically configured to: if the first signal power and the second signal power satisfy a first preset condition, and the third signal power and the fourth signal power satisfy a second preset condition, transmitting user data of the first UE and the second UE in a pairing manner on the first transmission port and the second transmission port, wherein the data allocation module selects the first transmission port to transmit the user data of the first UE, and selects the second transmission port to transmit the user data of the second UE, and the second preset condition includes: the third signal power is smaller than a third preset threshold, or the difference between the fourth signal power and the third signal power is larger than a fourth preset threshold, and the third preset threshold and the fourth preset threshold are positive values.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101990220A (en) * | 2009-07-31 | 2011-03-23 | 夏普株式会社 | Downlink multi-antenna and multi-base station cooperation method, base station and user equipment |
| CN102035579A (en) * | 2009-09-28 | 2011-04-27 | 夏普株式会社 | Information feedback method and user equipment |
| CN102158321A (en) * | 2011-04-28 | 2011-08-17 | 西安交通大学 | Method for distributing power and choosing antenna in distributed type MIMO (multiple input multiple output) system and capable of increasing power efficiency of mobile communication system |
| WO2015100620A1 (en) * | 2013-12-31 | 2015-07-09 | 展讯通信（上海）有限公司 | Ofdm communication system and method and device for receiving and transmitting signals |
-
2015
- 2015-09-30 CN CN201510641371.2A patent/CN106561007B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101990220A (en) * | 2009-07-31 | 2011-03-23 | 夏普株式会社 | Downlink multi-antenna and multi-base station cooperation method, base station and user equipment |
| CN102035579A (en) * | 2009-09-28 | 2011-04-27 | 夏普株式会社 | Information feedback method and user equipment |
| CN102158321A (en) * | 2011-04-28 | 2011-08-17 | 西安交通大学 | Method for distributing power and choosing antenna in distributed type MIMO (multiple input multiple output) system and capable of increasing power efficiency of mobile communication system |
| WO2015100620A1 (en) * | 2013-12-31 | 2015-07-09 | 展讯通信（上海）有限公司 | Ofdm communication system and method and device for receiving and transmitting signals |
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