CN110099401B - Transmission mode determining method, base station and terminal - Google Patents
Transmission mode determining method, base station and terminal Download PDFInfo
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- CN110099401B CN110099401B CN201810094562.5A CN201810094562A CN110099401B CN 110099401 B CN110099401 B CN 110099401B CN 201810094562 A CN201810094562 A CN 201810094562A CN 110099401 B CN110099401 B CN 110099401B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Abstract
The invention provides a transmission mode determining method, a base station and a terminal, wherein the transmission mode determining method is applied to the base station and comprises the following steps: acquiring a current arrival angle and a QoS (quality of service) index of a terminal; and determining that the current transmission mode is a single-user multiple-input multiple-output (MIMO) transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index. The invention dynamically and adaptively adjusts the sending mode according to the current arrival angle and QoS index of the terminal, thereby reducing the influence of the real-time position of the train on the communication quality of the communication system in a high-speed moving scene, improving the stability of the communication system and further better realizing the balance between high transmission rate and system robustness.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a transmission mode determining method, a base station, and a terminal.
Background
Currently, in the standardization process of 3GPP (3 rd Generation Partnership Project), a high-speed moving scene (e.g., a high-speed railway scene) is widely spotlighted as an important application scene.
In a high-speed mobile scenario, since a communication channel is difficult to acquire, data transmission efficiency is often low, and currently, in order to improve data transmission efficiency in the high-speed mobile scenario, multi-user MIMO (Multiple-Input Multiple-Output technology) is mainly used to implement multi-stream transmission. However, this method has some drawbacks, which mainly shows that the communication quality of the communication system is greatly influenced by the real-time position of the train. For example, in a high-speed rail scene using multi-user MIMO, as the distance between a train and a base station increases, the included angle between the arrival angles of signals of each user terminal on the train gradually decreases, that is, each communication channel formed by each user terminal and the base station is closer and closer, and even difficult to distinguish, so that during the communication process using multi-user MIMO, data of each user terminal has strong mutual interference, thereby reducing the communication quality.
Therefore, the communication quality of the communication system in the current high-speed moving scene is greatly influenced by the real-time position of the train.
Disclosure of Invention
In view of this, the present invention provides a transmission mode determining method, a base station, and a terminal, so as to solve the problem that the communication quality of a communication system in a current high-speed moving scene is greatly affected by the real-time position of a train.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, the present invention provides a transmission mode determining method applied to a base station, including:
acquiring a current arrival angle and a QoS (Quality of Service) index of a terminal;
and determining the current transmission mode to be a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
In a second aspect, the present invention further provides a transmission mode determining method, applied to a terminal, including:
and sending uplink information and QOS index information to a base station, wherein the uplink information and the QOS index information are respectively used for the base station to acquire the current arrival angle and the QoS index of the terminal, so that the base station determines that the current sending mode is a single-user MIMO sending mode or a multi-user MIMO sending mode according to the arrival angle and the QoS index.
In a third aspect, the present invention further provides a base station, including:
the receiver is used for acquiring the current arrival angle and the QoS index of the terminal;
and the processor is used for determining that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
In a fourth aspect, the present invention further provides a terminal, including:
and the transmitter is used for transmitting uplink information and QOS index information to a base station, wherein the uplink information and the QOS index information are respectively used for the base station to acquire the current arrival angle and the QoS index of the terminal, so that the base station determines that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
In a fifth aspect, the present invention also provides a base station, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; the processor implements the transmission mode determination method corresponding to the base station when executing the program.
In a sixth aspect, the present invention further provides a terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor; and when the processor executes the program, the transmission mode determining method corresponding to the terminal is realized.
In a seventh aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps in the transmission mode determination method corresponding to the base station; alternatively, the program implements the steps in the transmission mode determination method corresponding to the terminal described above when executed by the processor.
The technical scheme of the invention has the following beneficial effects:
the invention determines the current transmission mode to be a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the current arrival angle and QoS index of the terminal, namely, the base station dynamically and adaptively adjusts the transmission mode according to the current position and the current communication quality of the terminal, thereby reducing the influence of the real-time position of the train on the communication quality of the communication system in a high-speed mobile scene, improving the stability of the communication system and further better realizing the balance between high transmission rate and system robustness.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating a transmission mode determining method according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating a transmission mode determining method according to a second embodiment of the present invention;
Fig. 3 is a schematic diagram of an interaction flow between a terminal and a base station according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a transmission mode determining method applied to a base station, including:
and step 12, determining the current transmission mode to be a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
The obtaining may be obtained by the base station through calculation, or obtained by the base station by receiving data sent by other devices. The current arrival angle of the terminal may be an included angle between a wave ray and a horizontal plane when a wave (i.e., a signal) sent by the base station reaches the terminal at the current position.
It should be noted that, since the relative position between the rail and the base station is determined, and the distance between the terminal and the base station can be directly calculated through the arrival angle under the condition that the rail information (e.g., the distance value between the rail and the base station) and the train track information are known, in the step 102, the distance between the terminal and the base station can be calculated according to the arrival angle and the preset rail information, and then the current transmission mode is determined to be the single-user MIMO transmission mode or the multi-user MIMO transmission mode according to the distance between the terminal and the base station and the QOS indicator.
In the embodiment of the invention, the base station determines that the current transmission mode is a single-user MIMO transmission mode (which can reduce data interference between user terminals) or a multi-user MIMO transmission mode (which can improve the overall capacity of the system) according to the current arrival angle and QoS index of the terminal, namely, the base station performs dynamic self-adaptive adjustment according to the current position and the current communication quality of the terminal, so that the influence of the real-time position of a train on the communication quality of the communication system in a high-speed mobile scene can be reduced, the stability of the communication system is improved, and the balance between high transmission rate and system robustness is better realized.
In this embodiment of the present invention, optionally, the QoS indicator includes at least one of the following: CQI (Channel Quality Indicator), SINR (Signal to Interference plus Noise Ratio), RSRP (Reference Signal Receiving Power), and RSRQ (Reference Signal Receiving Quality).
The QoS index is not limited to the above listed indexes, but may be other related indexes, and is not listed here.
In this embodiment of the present invention, optionally, the step of obtaining the current arrival angle of the terminal includes:
and receiving uplink information sent by the terminal, and estimating the current arrival angle of the terminal according to the uplink information.
The Uplink information may be SRS (Sounding Reference Signal), PUSCH (Physical Uplink Shared Channel), demodulation Reference Signal DM-rs (demodulation Reference Signal), or the like, which is not limited in the embodiment of the present invention. When the uplink information adopts the SRS, the purpose of being compatible with the existing 5G NR (5 th-Generation New Radio) device can be achieved.
The estimating of the current arrival angle of the terminal may be calculating the current arrival angle of the terminal based on a certain algorithm; the estimated current angle of arrival of the terminal may be stored in a cache list for subsequent use. In this embodiment of the present invention, optionally, the step of obtaining the current QoS index of the terminal includes:
and receiving the QOS index information sent by the terminal.
The QOS indicator Information sent by the receiving terminal may be QOS indicator Information sent by the receiving terminal directly, or CSI (Channel State Information) carrying the QOS indicator Information sent by the receiving terminal, and the QOS indicator is obtained by receiving the CSI carrying the QOS indicator Information, so that the purpose of being compatible with existing 5G NR devices can be achieved, and the applicability of the communication system is improved. The QOS indicator information may be information that the terminal feeds back (i.e., transmits) to the base station according to a CSI-RS (channel state information reference signal) transmitted by the base station after receiving the CSI-RS.
Therefore, the QOS index information is a numerical value, and the feedback quantity is small, so that the QOS index acquired by the QOS index information sent by the receiving terminal is more suitable for a high-speed moving scene.
In this embodiment of the present invention, optionally, the step of determining, according to the angle of arrival and the QoS indicator, that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode includes:
when the arrival angle is smaller than or equal to a first preset threshold value and the QOS index is smaller than or equal to a second preset threshold value, determining that the current transmission mode is a single-user MIMO transmission mode;
otherwise, determining the current transmission mode as a multi-user MIMO transmission mode.
The first preset threshold and the second preset threshold may be adjusted as needed, so as to better achieve balance between high speed and system robustness.
Thus, when the arrival angle is less than or equal to the first preset threshold and the QOS index is less than or equal to the second preset threshold, the terminal is far away from the base station (the data interference between the terminals is strong), and the communication quality is poor, and at this time, the transmission mode is determined to be single-user MIMO, so that the data interference between the terminals can be further reduced, and the overall communication quality is improved; and when the arrival angle is greater than the first preset threshold or the QOS index is greater than the second preset threshold, the terminal is close to the base station (the data interference between the terminals is weak) or the communication quality is good, at the moment, the sending mode is determined to be the multi-user MIMO, the overall capacity of the system can be further improved, the influence of the real-time position of the train on the communication quality of the communication system in a high-speed moving scene is further reduced, and further the balance between the high transmission rate and the system robustness is better realized.
In this embodiment of the present invention, optionally, after the step of obtaining the current angle of arrival and QoS indicator of the terminal, the method further includes:
predicting a current Precoding Matrix Indicator (PMI) according to the arrival angle, the QOS index and preset train track information to obtain a current predicted PMI;
and generating a current beam forming vector corresponding to the current pre-estimated PMI.
The train track information may include rail information (e.g., a distance value between a rail and a base station) and train speed information; the estimate may be calculated based on an algorithm. The generating of the current beamforming vector corresponding to the current pre-estimated PMI may be adjusting a real beamforming vector based on the current pre-estimated PMI.
Therefore, the estimated PMI is adopted to carry out beam forming instead of the PMI fed back by the terminal, so that the problem that the PMI feedback of the terminal is not timely or delayed in a high-speed mobile scene can be solved, and the communication quality is improved.
In this embodiment of the present invention, optionally, before the step of generating the current beamforming vector corresponding to the current pre-estimated PMI, the method further includes:
Adjusting the current pre-estimated PMI according to K pre-stored pre-estimated PMIs and effect parameters generated by the K pre-estimated PMIs, wherein K is an integer greater than or equal to 1, and the K pre-estimated PMIs are K pre-estimated PMIs obtained by performing PMI pre-estimation on the basis of a terminal at K moments before pre-estimated time corresponding to the current pre-estimated PMI;
and generating a current beam forming vector corresponding to the adjusted current pre-estimated PMI.
The method for predicting the K predicted PMIs may be the same as the method for predicting the current predicted PMIs; the terminals at the K times may be terminals corresponding to K different positions. The effect parameter generated by the pre-estimated PMI may refer to a QOS and an arrival angle when data transmission is performed based on the pre-estimated PMI, and a corresponding QOS and arrival angle exist based on each pre-estimated PMI.
Therefore, the current pre-estimated PMI is adjusted based on the K pre-estimated PMIs and effect parameters generated by the K pre-estimated PMIs, the accuracy of the current pre-estimated PMI can be further improved, and the communication quality is further improved.
Referring to fig. 2, a second embodiment of the present invention further provides a transmission mode determining method, applied to a terminal, including:
The explanation of the uplink information, the QOS indicator information, the acquisition, the current arrival angle of the terminal, and the like may be explained in corresponding parts in the first embodiment of the present invention, and thus, details are not described here again.
The QOS indicator information can be directly sent to the base station, or the CSI carrying the QOS indicator information can be sent to the base station, and the CSI carrying the QOS indicator information can be compatible with the existing 5G NR device, so that the applicability of the communication system can be improved. In addition, the QOS indicator information may be information that is fed back to the base station by the terminal according to the CSI-RS after receiving the CSI-RS sent by the base station.
In the embodiment of the invention, the terminal sends the uplink information and the QOS index information to the base station, so that the base station can obtain the current arrival angle and the QoS index of the terminal according to the uplink information and the QOS index information, and the base station determines that the current sending mode is a single-user MIMO sending mode or a multi-user MIMO sending mode according to the arrival angle and the QoS index, even if the base station dynamically and adaptively adjusts according to the current position and the current communication quality of the terminal, the influence of the real-time position of a train on the communication quality of a communication system in a high-speed moving scene can be reduced, the stability of the communication system is improved, and the balance between the high transmission rate and the robustness of the system is better realized.
In this embodiment of the present invention, optionally, the QoS indicator includes at least one of the following: CQI, SINR, RSRP, and RSRQ.
The QoS index is not limited to the above listed indexes, but may be other related indexes, and is not listed here.
Referring to fig. 3, fig. 3 is a schematic diagram of an interaction procedure between a terminal and a base station according to a third embodiment of the present invention, where the schematic diagram specifically shows an overall procedure from an initial access to a data communication stage of the terminal, and the interaction procedure includes:
step 31: a base station initially accesses multi-beam and sends a simulation beam selection reference signal to a terminal;
step 32: the terminal feeds back (namely sends) a preferred simulation TRP (Total Radiated Power) wave beam to the base station according to the simulation wave beam selection reference signal sent by the base station;
step 33: the base station sends SRS configuration information to the terminal;
step 34: the terminal feeds back the SRS to the base station according to the SRS configuration information sent by the base station;
step 35: the base station estimates the current arrival angle of the terminal according to the SRS fed back by the terminal, and records the arrival angle in a cache table;
step 36: a base station sends CSI-RS to a terminal;
step 37: the terminal feeds back the CSI to the base station according to the CSI-RS sent by the base station, wherein the CSI carries CQI;
Step 38: the base station determines that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the current arrival angle of the terminal and the CQI fed back by the terminal;
step 39: estimating a current PMI according to the current arrival angle of the terminal, the CQI and preset train track information to obtain a current estimated PMI; generating a current beam forming vector corresponding to the current pre-estimated PMI according to the current pre-estimated PMI;
step 310: the base station transmits data to the terminal.
Based on the same inventive concept, referring to fig. 4, a third embodiment of the present invention further provides a base station, including:
a receiver 41, configured to obtain a current angle of arrival and a QoS indicator of a terminal;
and a processor 42, configured to determine, according to the angle of arrival and the QoS indicator, that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode.
The base station in the embodiment of the invention determines that the current transmission mode is the single-user MIMO transmission mode or the multi-user MIMO transmission mode according to the current arrival angle and the QoS index of the terminal, namely, the base station dynamically and adaptively adjusts the transmission mode according to the current position and the current communication quality of the terminal, so that the influence of the real-time position of a train on the communication quality of a communication system in a high-speed moving scene can be reduced, the stability of the communication system is improved, and the balance between the high transmission rate and the robustness of the system is better realized.
The Base Station in the embodiment of the present invention may be a Base Station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), may also be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may also be an evolved Node B (eNB or eNodeB) in LTE, or a relay Station or an Access point, or a Base Station in a future 5G network, and the like, and is not limited herein.
In this embodiment of the present invention, optionally, the receiver 41 is further configured to receive uplink information sent by the terminal, and estimate the current angle of arrival of the terminal according to the uplink information.
The Uplink information may be SRS (Sounding Reference Signal), PUSCH (Physical Uplink Shared Channel), demodulation Reference Signal DM-rs (demodulation Reference Signal), or the like, which is not limited in the embodiment of the present invention. When the uplink information adopts the SRS, the purpose of being compatible with the existing 5G NR (5 th-Generation New Radio) device can be achieved.
In this embodiment of the present invention, optionally, the receiver 41 is further configured to receive QOS indicator information sent by the terminal.
The QOS indicator Information sent by the receiving terminal may be QOS indicator Information sent by the receiving terminal directly, or CSI (Channel State Information) carrying the QOS indicator Information sent by the receiving terminal, and the QOS indicator is obtained by receiving the CSI carrying the QOS indicator Information, so that the purpose of being compatible with existing 5G NR devices can be achieved, and the applicability of the communication system is improved.
Therefore, the QOS index information is a numerical value and the feedback quantity is small, so that the QOS index acquired by the QOS index information sent by the receiving terminal is more suitable for a high-speed moving scene.
In this embodiment of the present invention, optionally, the processor 42 is further configured to determine that the current transmission mode is a single-user MIMO transmission mode when the angle of arrival is less than or equal to a first preset threshold and the QOS indicator is less than or equal to a second preset threshold; otherwise, determining the current transmission mode as a multi-user MIMO transmission mode.
Therefore, when the arrival angle is smaller than or equal to the first preset threshold value and the QOS index is smaller than or equal to the second preset threshold value, the terminal is far away from the base station (the data interference between the terminals is strong) and the communication quality is poor, and at the moment, the sending mode is determined to be single-user MIMO, so that the data interference between the terminals can be further reduced, and the overall communication quality is improved; and when the arrival angle is greater than the first preset threshold or the QOS index is greater than the second preset threshold, the terminal is closer to the base station (the data interference between the terminals is weaker) or the communication quality is better, and at the moment, the transmission mode is determined to be the multi-user MIMO, so that the overall capacity of the system can be further improved, and further, the balance between the high transmission rate and the robustness of the system can be better realized.
In this embodiment of the present invention, optionally, the processor 42 is further configured to predict a current PMI according to the arrival angle, the QOS index, and preset train trajectory information, so as to obtain a current predicted PMI; and generating a current beam forming vector corresponding to the current pre-estimated PMI.
Therefore, the estimated PMI is adopted to carry out beam forming instead of the PMI fed back by the terminal, so that the problem that the PMI feedback of the terminal is not timely or delayed in a high-speed mobile scene can be solved, and the communication quality is improved.
In this embodiment of the present invention, optionally, the QoS indicator includes at least one of the following: channel quality indication CQI, signal to interference plus noise ratio SINR, reference signal received power RSRP and reference signal received quality RSRQ.
In the embodiment of the present invention, optionally, the processor is further configured to adjust the current pre-estimated PMI according to K pre-stored pre-estimated PMIs and effect parameters generated by the K pre-estimated PMIs, where K is an integer greater than or equal to 1, and the K pre-estimated PMIs are K pre-estimated PMIs obtained by performing PMI pre-estimation based on a terminal at K times before pre-estimated time corresponding to the current pre-estimated PMI; and generating a current beam forming vector corresponding to the adjusted current pre-estimated PMI.
Referring to fig. 5, a fourth embodiment of the present invention further provides a terminal, including:
a transmitter 51, configured to send uplink information and QOS indicator information to a base station, where the uplink information and the QOS indicator information are respectively used for the base station to obtain a current angle of arrival and a QOS indicator of the terminal, so that the base station determines, according to the angle of arrival and the QOS indicator, that a current sending mode is a single-user MIMO sending mode or a multi-user MIMO sending mode.
In the embodiment of the invention, the terminal sends the uplink information and the QOS index information to the base station, so that the base station can obtain the current arrival angle and the QoS index of the terminal according to the uplink information and the QOS index information, and the base station determines that the current sending mode is a single-user MIMO sending mode or a multi-user MIMO sending mode according to the arrival angle and the QoS index, even if the base station dynamically and adaptively adjusts according to the current position and the current communication quality of the terminal, the influence of the real-time position of a train on the communication quality of a communication system in a high-speed moving scene can be reduced, the stability of the communication system is improved, and the balance between the high transmission rate and the robustness of the system is better realized.
The terminal in the embodiments of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User Device or User Equipment), which are not limited herein.
In this embodiment of the present invention, optionally, the QoS indicator includes at least one of the following: CQI, SINR, RSRP, and RSRQ.
The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the transmission mode determination method corresponding to the base station in any of the above embodiments when executing the program.
The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the transmission mode determination method corresponding to the terminal in any of the above embodiments when executing the program.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the transmission mode determination method corresponding to the base station in any of the above embodiments; alternatively, the program is executed by a processor to implement the steps in the transmission mode determination method corresponding to the base station in any of the above embodiments.
Such computer-readable media, which include both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A transmission mode determining method applied to a base station is characterized by comprising the following steps:
acquiring a current arrival angle and a QoS (quality of service) index of a terminal;
estimating a current Precoding Matrix Indicator (PMI) according to the arrival angle, the QoS index and preset train track information to obtain a current estimated PMI; generating a current beam forming vector corresponding to the current pre-estimated PMI;
and determining that the current transmission mode is a single-user multiple-input multiple-output (MIMO) transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
2. The method of claim 1, wherein the step of obtaining the current angle of arrival of the terminal comprises:
and receiving uplink information sent by the terminal, and estimating the current arrival angle of the terminal according to the uplink information.
3. The method of claim 1, wherein the step of obtaining the current QoS index of the terminal comprises:
And receiving the QoS index information sent by the terminal.
4. The method of claim 1, wherein the step of determining whether the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the angle of arrival and the QoS indicator comprises:
when the arrival angle is smaller than or equal to a first preset threshold and the QoS index is smaller than or equal to a second preset threshold, determining that the current transmission mode is a single-user MIMO transmission mode;
otherwise, determining the current transmission mode as a multi-user MIMO transmission mode.
5. The method according to any of claims 1 to 4, wherein the QoS metrics comprise at least one of: channel quality indication CQI, signal to interference plus noise ratio SINR, reference signal received power RSRP and reference signal received quality RSRQ.
6. A transmission mode determining method applied to a terminal is characterized by comprising the following steps:
sending uplink information and QoS index information to a base station, wherein the uplink information and the QoS index information are respectively used for the base station to acquire the current arrival angle and QoS index of the terminal, so that the base station determines that the current sending mode is a single-user MIMO sending mode or a multi-user MIMO sending mode according to the arrival angle and the QoS index; estimating the current precoding matrix indicator PMI by the base station according to the arrival angle, the QoS index and preset train track information to obtain the current estimated PMI; and generating a current beam forming vector corresponding to the current pre-estimated PMI.
7. A base station, comprising:
the receiver is used for acquiring the current arrival angle and the QoS index of the terminal;
the processor is used for predicting the current PMI according to the arrival angle, the QoS index and the preset train track information to obtain the current predicted PMI; generating a current beam forming vector corresponding to the current pre-estimated PMI;
and the processor is used for determining that the current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode according to the arrival angle and the QoS index.
8. The base station of claim 7, wherein the processor is further configured to determine that the current transmission mode is a single-user MIMO transmission mode when the angle of arrival is less than or equal to a first preset threshold and the QoS indicator is less than or equal to a second preset threshold; otherwise, determining the current transmission mode as a multi-user MIMO transmission mode.
9. A terminal, comprising:
a transmitter, configured to transmit uplink information and QoS indicator information to a base station, where the uplink information and the QoS indicator information are respectively used for the base station to obtain a current angle of arrival and a QoS indicator of the terminal, so that the base station determines, according to the angle of arrival and the QoS indicator, that a current transmission mode is a single-user MIMO transmission mode or a multi-user MIMO transmission mode; estimating the current precoding matrix indicator PMI by the base station according to the arrival angle, the QoS index and preset train track information to obtain the current estimated PMI; and generating a current beam forming vector corresponding to the current pre-estimated PMI.
10. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the transmission mode determination method according to any one of claims 1-5 when executing the program.
11. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the transmission mode determination method of claim 6 when executing the program.
12. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps in the transmission mode determination method according to any one of claims 1 to 5; alternatively, the program realizes the steps in the transmission mode determination method as claimed in claim 6 when executed by a processor.
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| CN114599052B (en) * | 2022-02-28 | 2023-11-21 | 西安开天铁路电气股份有限公司 | Vehicle-mounted wireless communication multi-device continuous transmission method |
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