WO2018006636A1

WO2018006636A1 - Uplink antenna selection method and device

Info

Publication number: WO2018006636A1
Application number: PCT/CN2017/081907
Authority: WO
Inventors: 邢树先; 高明刚
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-07-04
Filing date: 2017-04-25
Publication date: 2018-01-11
Also published as: CN107579764A; CN107579764B

Abstract

An uplink antenna selection method and device. The method comprises: when an open loop antenna selection mode is started, reading a current sub-frame of a downlink antenna; when the current sub-frame is a channel state information measurement sub-frame, measuring a signal parameter of a current downlink antenna according to each channel state information measurement sub-frame; and according to the signal parameter, selecting an uplink antenna with the optimal signal as an uplink signal sending antenna. The technical solution of the present application can ensure the gain and performance of an antenna, and improve the accuracy and reliability of a terminal reporting information in a high-speed movement state so as to enable a user to obtain better voice and data service.

Description

Uplink antenna selection method and device

Technical field

This document relates to, but is not limited to, the field of communication technologies, and relates to an uplink antenna selection method and apparatus.

Background technique

In the LTE (Long Term Evolution) technology of the 3rd Generation Partnership Project (3GPP), the LTE system can be classified into LTE-FDD (Frequency Division Duplexing) according to the duplex mode. And the TDD-LTE (Time Division Duplexing), in the two duplex modes, the RRC (Radio Resource Control) layer on the network side can control whether the UE (User Equipment) is The uplink antenna selection is enabled, and the uplink antenna selection mode is specified. The UE selects different uplink antennas to send uplink signals to the network side in different modes.

At present, LTE supports uplink antenna selection technology. The uplink antenna selection technology defined in the 3GPP standard can be classified into an open-loop antenna selection technique and a closed-loop antenna selection technique according to the presence or absence of feedback. The uplink antenna selection technology can be shared by multiple antennas by switching. Radio Frequency (RF) link, so you can get higher performance without increasing hardware complexity. The open-loop antenna selection technology does not utilize the channel change. When the UE selects the uplink antenna to send the uplink signal, it completely relies on its periodic handover, and does not need information feedback on the network side. The open-loop antenna selection technique does not utilize channel variations, and the user equipment only periodically switches the uplink signal transmission antenna repeatedly, which is weak in switching gain and performance. In the case of high-speed mobile UE, the closed-loop antenna selection technology has a fast channel change, and the delay in the feedback process will cause the channel state when the uplink antenna is selected is not in the feedback state, resulting in an increase in the antenna selection error rate. Selecting the time delay of switching the relative CSI (Channel State Information) feedback will undoubtedly lead to the change of the true state of the channel, and the higher the UE moves at a high speed, the more obvious this change will be, and the data shows that when the UE moves at a high speed At 120 km/h (km/h), the feedback information error rate of the closed-loop feedback scheme will reach 10%, which greatly reduces the accuracy and reliability of antenna reception.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The present application proposes an uplink antenna selection method and device, which can ensure the gain and performance of the antenna, and improve the accuracy and reliability of reporting information in the high-speed mobile state of the terminal.

An embodiment of the present invention provides an uplink antenna selection method, where the method includes:

Reading the current subframe of the downlink antenna when the open loop antenna selection mode is enabled;

When the current subframe is a channel state information measurement subframe, measuring a signal parameter of the current downlink antenna according to each channel state information measurement subframe;

The uplink antenna with the best signal selection signal is used as the uplink signal transmitting antenna according to the signal parameter.

Optionally, the signal parameter includes a signal quality parameter and a signal strength parameter, and the uplink antenna that is optimal according to the signal parameter selection signal is used as an uplink signal transmitting antenna, and includes:

Performing a first comparison on the signal quality parameters of each downlink antenna, performing a second comparison on the signal strength parameters of each downlink antenna, and selecting the optimal signal according to the result of the first comparison and the result of the second comparison The uplink antenna acts as an uplink signal transmission antenna.

Optionally, performing a first comparison on a signal quality parameter of each downlink antenna, performing a second comparison on a signal strength parameter of each downlink antenna, and according to the result of the first comparison and the second comparison As a result, the uplink antenna with the best signal selection as the uplink signal transmitting antenna includes:

Comparing the signal quality parameters of each downlink antenna, when the signal quality parameters of the downlink antenna are different, the uplink antenna with the best signal quality parameter is selected as the uplink signal transmitting antenna.

Optionally, performing a first comparison on a signal quality parameter of each downlink antenna, performing a second comparison on a signal strength parameter of each downlink antenna, and according to the result of the first comparison and the second comparison As a result, selecting the uplink antenna with the best signal as the uplink signal transmitting antenna further includes:

Comparing signal strength parameters of each downlink antenna when the signal quality parameters of the downlink antennas are the same;

When the signal strength parameters of the downlink antenna are different, an uplink antenna with the best signal strength parameter is selected as the uplink signal transmitting antenna.

Optionally, the measuring the subframe of the current downlink antenna according to each channel state information measurement subframe. Before the parameter, the method further includes:

Determining whether the current subframe is the channel state information measurement subframe;

If the subframe is not measured for the channel state information, the step of performing the reading of the current subframe of the downlink antenna is returned.

An embodiment of the present invention further provides an uplink antenna selection apparatus, where the apparatus includes:

The reading module is configured to read the current subframe of the downlink antenna when the open loop antenna selection mode is enabled;

The signal measurement module is configured to: when the current subframe is a channel state information measurement subframe, measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe;

The antenna selection module is configured to select an uplink antenna that is optimal according to the signal parameter selection signal as an uplink signal transmission antenna.

Optionally, the signal parameter includes a signal quality parameter and a signal strength parameter, and the antenna selection module includes:

a comparing unit, configured to perform a first comparison on a signal quality parameter of each downlink antenna, and perform a second comparison on a signal strength parameter of each downlink antenna;

The selecting unit is configured to select, as the uplink signal transmitting antenna, an uplink antenna that is optimal according to the result of the first comparison and the result of the second comparison.

Optionally, the comparing unit is configured to: compare signal quality parameters of each downlink antenna;

The selecting unit is configured to: when the signal quality parameters of the downlink antennas that are compared by the comparing unit are different, select an uplink antenna with the best signal quality parameter as the uplink signal transmitting antenna.

Optionally, the comparing unit is configured to: when the signal quality parameters of the downlink antennas are the same, compare signal strength parameters of each downlink antenna;

The selecting unit is configured to: when the signal strength parameters of the downlink antennas that are compared by the comparing unit are different, select an uplink antenna with an optimal signal strength parameter as an uplink signal transmitting antenna.

Optionally, the device further includes:

a determining module, configured to determine whether the current subframe is the channel state information measurement subframe; If the channel state information measurement subframe is used, the signal measurement module is called to measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe;

If the subframe is not measured for the channel state information, the reading module is called to read the current subframe of the downlink antenna.

In the embodiment of the present invention, when the open loop antenna selection mode is enabled, the current subframe of the downlink antenna is read; when the current subframe is a channel state information measurement subframe, the current downlink antenna is measured according to each channel state information measurement subframe. The signal parameter is selected according to the signal parameter, and the uplink antenna with the best signal is selected as the uplink signal transmitting antenna. The above technical solution utilizes the same spectrum used by the uplink and downlink channels in the TDD-LTE technology, so the uplink channel and the downlink channel have the characteristics of high correlation reciprocity, and the related open-loop antenna selection technology is improved, and the related open loop is avoided. The antenna selection technique does not utilize channel variation, and the user equipment only periodically switches the uplink signal transmitting antenna, resulting in insufficient antenna gain and waste of performance, and avoids the feedback delay of the terminal in the high-speed moving state in the related closed-loop antenna selection technique. The resulting antenna selection error, thus ensuring the gain and performance of the antenna, and improving the accuracy and reliability of the reported information in the high-speed mobile state of the terminal, thereby enabling users to obtain better voice and data services. The embodiment of the invention further provides a computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement an uplink antenna selection method.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

1 is a flowchart of an uplink antenna selection method according to Embodiment 1 of the present invention;

2 is a schematic diagram of interaction between a network side and a terminal side in an uplink antenna selection method according to Embodiment 1 of the present invention;

3 is a flowchart of a method for selecting an uplink antenna according to Embodiment 2 of the present invention;

4 is a flowchart of an uplink antenna selection method according to Embodiment 3 of the present invention;

5 is a schematic structural diagram of an uplink antenna selection apparatus according to Embodiment 4 of the present invention;

6 is a schematic structural diagram of a system of an uplink antenna selection apparatus according to Embodiment 4 of the present invention;

7 is a schematic diagram of a refinement function of an antenna selection module in an uplink antenna selection apparatus according to Embodiment 4 of the present invention;

FIG. 8 is another schematic structural diagram of an uplink antenna selection apparatus according to Embodiment 4 of the present invention.

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

Embodiment 1

Referring to FIG. 1, FIG. 1 is a flowchart of a method for selecting an uplink antenna according to an embodiment of the present invention, where the method for selecting an uplink antenna includes:

Step S100: When the open loop antenna selection mode is enabled, the current subframe of the downlink antenna is read.

Step S200: When the current subframe is a channel state information measurement subframe, measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe.

As an implementation manner, the UE measures the signal parameters of the current downlink antenna according to the CSI measurement subframe of the downlink antenna, and acquires channel state information of the current downlink antenna.

FIG. 2 is a schematic diagram of interaction between a network side and a terminal side in an uplink antenna selection method according to an embodiment of the present invention. As shown in FIG. 2, the TDD-LTE system in this embodiment includes a terminal side and a network side, and the terminal side device includes a user equipment such as a mobile phone and a computer, and the terminal side and the network side communicate through the uplink and downlink channels.

In this embodiment, the network side may send an enable open loop antenna selection command to the terminal side, and the terminal side enables the CSI based open loop antenna selection function after receiving the instruction. At this time, the terminal reads the current subframe of the downlink antenna, and can determine whether the current subframe is a CSI measurement subframe. If the current subframe is a CSI measurement subframe, the UE measures the current subframe measurement according to each channel state information. a signal parameter of the downlink antenna; if the current subframe is not a CSI measurement subframe, returning to perform reading the downlink The step of the current sub-frame of the line, whereby a periodic decision can be formed. Of course, the CSI measurement subframe can also be directly read, and no judgment is needed.

After the current subframe is a CSI measurement subframe, the signal parameter of the current downlink antenna is measured according to each CSI measurement subframe, and an optimal uplink antenna is selected as the uplink signal transmission antenna according to the signal parameter, by using the selection. The uplink signal transmitting antenna transmits an uplink signal to the network side. It should be noted that, in order to improve the correctness of the selection, in this embodiment, the current subframe of all downlink antennas may be read, and of course, the current subframe of all downlink antennas that are enabled may be read.

In this implementation, the terminal can also automatically enable the open loop antenna selection function when starting up. In other embodiments, when the current subframe of the downlink antenna is read, the reading is performed according to the judgment rule of the CSI measurement subframe. In this case, the CSI measurement subframe of the downlink antenna may be directly read.

It should be noted that, in the TDD mode, signal transmission is performed in different time slots of the same frequency channel, and is separated by a certain guarantee time, and the same channel is used to transmit information upward and downward, so The uplink channel and the downlink channel have high correlation reciprocity. By measuring the downlink channel state information, the signal strength of the corresponding downlink antenna can be judged, thereby appropriately selecting the uplink signal transmitting antenna. The embodiments of the present invention can be applied to multiple antenna design modes of MIMO (Multiple Input Multiple-Output) technology (except for uplink dual-issue), such as uplink single-issue single-receipt, uplink single-issue dual-receiving, etc. It can also be applied to other multi-antenna technologies, and can be flexibly selected according to actual needs.

In this embodiment, according to the 3GPP standard protocol version number 3GPP TS 36.213, since the technical standard is for a specific UE, the UE knows which subframes to perform CSI measurement. Through the algorithm specified in the technical standard, the UE may determine a CSI measurement subframe of the downlink antenna, and then measure a signal parameter of the downlink antenna according to each CSI measurement subframe. Certainly, the CSI measurement subframe of the downlink antenna may also be determined by using other standard protocols or other technical standards, and then the signal parameters of the downlink antenna are measured according to each CSI subframe. In this embodiment, it can be flexibly set according to actual needs.

Step S300, selecting an uplink antenna that is optimal according to the signal parameter selection signal as an uplink signal transmitting antenna.

After measuring the signal parameters, the UE selects an uplink antenna with the best signal as the uplink signal transmission antenna according to the signal parameter.

The signal parameters measured by the UE according to the CSI measurement subframe in this embodiment include a signal quality parameter RSRQ and a signal strength parameter RSRP. Certainly, the measured signal parameters are not limited to the RSRQ and the RSRP. For example, the received signal strength indicator RSSI (Received Signal Strength Indicator) or the signal to interference plus noise ratio (SINR) signal parameters may be measured. Actually, you need to set it flexibly.

Optionally, the uplink antenna that is optimal according to the signal parameter selection signal is used as an uplink signal transmitting antenna, and may include: performing first comparison on a signal quality parameter of each downlink antenna, and performing signal strength parameters of each downlink antenna. And a second comparison, and selecting an uplink antenna with the best signal as the uplink signal transmitting antenna according to the result of the first comparison and the result of the second comparison. In this implementation, the UE can simultaneously compare the signal quality parameter and the signal strength parameter of the downlink antenna, or set the comparison priority to compare, for example, compare the signal quality parameter first, and then compare the signal strength parameter. Of course, the UE can also compare only the downlink antenna. In the embodiment of the present invention, the signal quality parameter or the signal strength parameter of the downlink antenna can be flexibly set according to actual needs. After obtaining the comparison result, the UE selects the antenna with the best signal as the uplink signal transmitting antenna according to the comparison result.

Optionally, after measuring the signal parameters of the downlink antenna, the UE may separately compare different signal parameters according to an algorithm specified in the current technical standard, and select an uplink antenna with the optimal signal as the uplink signal transmitting antenna according to the comparison result. Certainly, the UE may not compare the signal parameters. For example, different technical parameters may be directly evaluated according to current technical standards, and the uplink antenna with the best signal is selected as the uplink signal transmitting antenna according to the evaluation result.

Optionally, before the step of measuring a signal parameter of the current downlink antenna according to each channel state information measurement subframe, the method further includes:

Determining whether the current subframe is the channel state information measurement subframe; if the channel state information measurement subframe is no, returning to the step of performing reading the current subframe of the downlink antenna.

Optionally, before the open loop selection mode is enabled on the network side, the moving speed of the user terminal may also be acquired; and then determining whether the moving speed is greater than or equal to a preset value; if the moving speed of the current user terminal is greater than or equal to a preset value , the open loop antenna selection mode is enabled.

In this embodiment, the preset value of the moving speed of the UE may be 120 km/h, and in other implementations, the preset value may be flexibly set. When the network side determines that the moving speed of the UE is greater than or equal to 120 km/h, Then, it is determined that the UE is in a high-speed moving state at this time, and the open-loop antenna selection mode is enabled; when it is determined that the moving speed of the UE is less than 120 km/h, it is determined that the UE is not in the high-speed moving state at this time, and the open-loop antenna selection mode may not be enabled. The associated closed loop antenna selection mode is employed.

It should be noted that, when the UE is not in the high-speed mobile state, the open-loop antenna selection mode may be used to complete the selection of the uplink antenna. In this embodiment, the flexible setting may be performed according to actual needs.

In this embodiment, the UE measures a signal parameter of the current downlink antenna according to each channel state information measurement subframe; and selects an uplink antenna with the best signal as the uplink signal transmission antenna according to the signal parameter. In this embodiment, the uplink and downlink channels have the same spectrum of reciprocity in the TDD-LTE technology, and therefore the uplink channel and the downlink channel have a high correlation reciprocity. An uplink antenna selection method is proposed. The method is based on the CSI of the downlink antenna. The measurement sub-frame measurement measures the signal parameters of the current downlink antenna, and obtains the channel state information of the current downlink antenna. After the UE obtains the signal parameters, the UE selects the optimal uplink antenna as the uplink signal transmission antenna according to the signal parameter, thereby avoiding correlation. The open-loop antenna selection technique does not utilize the channel change, and the user equipment only periodically switches the uplink signal transmitting antenna, resulting in insufficient antenna gain and waste of performance, and also avoids the related closed-loop antenna selection technique in which the terminal is in a high-speed moving state. The antenna selection error caused by the feedback delay. In this embodiment, the gain and performance of the antenna can be ensured, and the accuracy and reliability of the reported information in the high-speed mobile state of the terminal can be improved, thereby enabling the user to obtain better voice and data services.

Embodiment 2

FIG. 3 is a schematic flowchart diagram of an uplink antenna selection method according to an embodiment of the present invention. Based on the foregoing embodiment, in this embodiment, the step S300 may include:

Step S310: Compare signal quality parameters of the downlink antenna. When the signal quality parameters of the downlink antenna are different, select an uplink antenna with the best signal quality parameter as the uplink signal transmission antenna.

In this embodiment, the signal parameters measured by the UE according to the CSI measurement subframe include a signal quality parameter RSRQ and a signal strength parameter RSRP. After measuring the signal quality parameter RSRQ and the signal strength parameter RSRP of the downlink antenna, the UE compares the RSRQ and the RSRP respectively, and obtains a corresponding comparison result, and then selects an uplink antenna that is optimal according to the comparison result as an uplink signal. Send the antenna.

The following is an example of a scenario in which two downlink antennas are present, respectively, for antenna 1 and antenna 2.

After measuring the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 1, and measuring the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 2, the UE compares the RSRQ and the RSRP respectively. The UE may preferentially compare the signal quality parameters of the antenna 1 and the antenna 2, that is, compare the RSRQ values, and obtain a corresponding signal quality parameter comparison result. If the comparison result shows that the RSRQ values of the antenna 1 and the antenna 2 are different, the antenna 1 is obtained according to the result. The antenna with the best signal quality is selected as the uplink signal transmitting antenna in the antenna 2, thereby completing the selection of the uplink antenna. Of course, the UE can also preferentially compare the signal strength parameters of the antenna 1 and the antenna 2, that is, compare the RSRP values. In this embodiment, flexible settings can be made according to actual needs.

For example, in a channel state information measurement subframe, the UE measures the RSRP and RSRQ values of the current downlink antenna 1 and the downlink antenna 2, respectively, and the measurement result records are as shown in Table 1:

天线antenna	RSRP值RSRP value	RSRQ值RSRQ value
11	-85-85	-5-5
22	-87-87	-7-7

Table 1

The UE can compare the signal quality parameters preferentially, that is, compare the RSRQ values of the antenna 1 and the antenna 2. From the above table, it can be compared that the RSRQ values of the antenna 1 and the antenna 2 are different, so the antenna with the best signal quality is selected as the uplink signal transmitting antenna. Since the RSRQ value of the antenna 1 is better than the antenna 2, the UE selects the antenna 1 as an uplink signal transmitting antenna.

In this embodiment, since there may be more than one signal parameter of each downlink antenna measured by the terminal, in this embodiment, the signal parameter is set to be prioritized by setting a priority mode, and parameters for characterizing the signal quality are first compared. If the signal quality parameters of each antenna are different, the uplink antenna with the best signal is directly selected from the downlink antenna as the uplink signal transmitting antenna according to the comparison result, and the signal strength parameter does not need to be compared. In this embodiment, the UE can compare and process the signal parameters of the downlink antenna according to a preset priority, so as to correctly and efficiently select the uplink antenna with the optimal signal.

Embodiment 3

FIG. 4 is a schematic flowchart diagram of an uplink antenna selection method according to an embodiment of the present invention.

Based on the foregoing embodiment, in this embodiment, step S300 may further include:

Step S320: When the signal quality parameters of the downlink antennas are the same, compare the signal strength parameters of the downlink antenna, and select an uplink antenna with the best signal strength parameter as the uplink signal transmitting antenna.

In this embodiment, after measuring the signal quality parameter RSRQ and the signal strength parameter RSRP of the downlink antenna, the UE compares the RSRQ and the RSRP respectively, and obtains a corresponding comparison result, and then selects an optimal uplink according to the comparison result. The antenna acts as an uplink signal transmitting antenna.

The following is an example of a scenario in which two downlink antennas are present, respectively, for antennas 1 and 2.

After the UE obtains the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 1 and the antenna 2, and measures the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 2, the RSRQ and the RSRP are respectively compared. The UE can preferentially compare the signal quality parameters of the antenna 1 and the antenna 2, that is, compare the RSRQ values to obtain a corresponding signal quality parameter comparison result, and when the result shows that the RSRQ values of the two antenna records are the same, compare the antenna 1 and the antenna. The signal strength parameter of 2, that is, the RSRP value is compared, the corresponding signal strength parameter comparison result is obtained, and the antenna with the best signal strength is selected from the antenna 1 and the antenna 2 as the uplink signal transmitting antenna according to the result, thereby completing the selection of the uplink antenna. .

For example, in a channel state information measurement subframe, the UE measures the RSRP and RSRQ values of the current downlink antenna 1 and the downlink antenna 2, respectively, and the measurement result records are as shown in Table 2:

天线antenna	RSRP值RSRP value	RSRQ值RSRQ value
11	-85-85	-5-5
22	-83-83	-5-5

Table 2

When the downlink RSRQ measurements recorded by the two antennas are the same, the UE compares the signal strength parameters, that is, compares the RSRP values of the antenna 1 and the antenna 2. It can be compared from the above table that the RSRQ values of antenna 1 and antenna 2 are the same, but the RSRP value of antenna 2 is better than that of antenna 1, and the UE selects antenna 2 as the uplink signal transmitting antenna.

Through the above description, in this embodiment, the comparison priority of the signal quality parameter can be set to be higher than Signal strength parameter. When the signal quality parameters of each downlink antenna are different, the UE can select the uplink antenna by comparing the signal quality parameters of the downlink antenna, thereby ensuring the implementation efficiency; when the signal quality parameters of each downlink antenna are the same, the UE needs Then compare the signal strength parameters to achieve the selection of the uplink antenna.

Of course, in other implementations, the signal quality parameter may not be set to have a higher priority than the signal strength parameter, and the priorities of the two are the same or not, and the signal quality parameters and the signal strength parameters of the downlink antenna are separately performed. Comparing and selecting the uplink antenna with the best signal as the uplink signal transmitting antenna according to the comparison result, specifically, comparing the signal quality parameter and the signal strength parameter of the downlink antenna simultaneously, obtaining the comparison result, and then comparing according to each downlink antenna In the result, the corresponding uplink antenna is selected, and the selection process can refer to the above process. For example, it can be achieved by adding weights (such as signal strength parameter *60%+signal quality parameter *40%), and comprehensive comparison based on weights. As shown in Table 3, the downlink reception of the antenna 2 is superior to that of the antenna 1, and therefore the antenna 2 having a higher overall score is selected as the uplink antenna.

天线antenna	RSRP值RSRP value	RSRQ值RSRQ value
11	-85-85	-5-5
22	-83-83	-6-6

table 3

Of course, the corresponding overall score can also be determined according to the comparison result between the signal quality parameter and the signal strength parameter, so that the uplink antenna corresponding to the downlink antenna with the highest overall score can be selected.

Since the signal parameters of each of the downlink antennas measured by the terminal may be more than one, in this embodiment, the signal parameters are set to be prioritized by setting a priority mode, and parameters for characterizing the signal quality are first compared, if each If the signal quality parameters of the antenna are the same, the signal strength parameter is compared, and the uplink antenna with the best signal is selected from the downlink antenna as the uplink signal transmitting antenna according to the comparison result. In this embodiment, the UE can compare and process the signal parameters of the downlink antenna according to a preset priority, so as to correctly and efficiently select the uplink antenna with the optimal signal.

Embodiment 4

5 is a schematic structural diagram of an uplink antenna selection apparatus according to an embodiment of the present invention, the uplink antenna selection apparatus includes: a reading module 100, a signal measurement module 200, and an antenna selection module 300.

The reading module 100 is configured to read the current subframe of the downlink antenna when the open loop antenna selection mode is enabled.

The signal measurement module 200 is configured to measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe.

As an implementation manner, the reading module 100 reads the current subframe of the downlink antenna, and the signal measurement module 200 measures the signal parameters of the current downlink antenna according to the CSI measurement subframe of the downlink antenna, and acquires channel state information of the current downlink antenna.

FIG. 6 is a schematic structural diagram of an uplink antenna selection apparatus according to an embodiment of the present invention. As shown in FIG. 6 , the TDD-LTE system includes a terminal side and a network side, and the terminal side device includes a user equipment such as a mobile phone and a computer. The terminal implements signal processing through a module such as a signal measurement module and an antenna selection module, and then sends a processing module to the network. The uplink signal is sent by the side, and the terminal side and the network side communicate through the uplink and downlink channels.

It should be noted that, in order to improve the correctness of the selection, in this embodiment, the current subframe of all downlink antennas may be read, or the current subframe of all downlink antennas that are enabled may be read. Optionally, the uplink antenna selection device may further include: a determining module (not shown in FIG. 5) configured to determine whether the current subframe is the channel state information measurement subframe, and if the channel state information is Measuring the subframe, invoking the signal measurement module to measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe; if the subframe state is not measured for the channel state information, the reading module is called to read the downlink The current subframe of the antenna.

In this embodiment, the network side may send an enable open loop antenna selection command to the terminal side, and the terminal side enables the CSI-based open loop antenna selection function after receiving the instruction, and the terminal reads the current subframe of the downlink antenna. The determining module determines whether the current subframe is a CSI measurement subframe, and if the current subframe is a CSI measurement subframe, the signal measurement module 200 measures a signal parameter of the current downlink antenna according to each channel state information measurement subframe; The current subframe is not a CSI measurement subframe, then it is called The reading module 100 reads the current subframe of the downlink antenna, whereby a periodic determination can be formed. Of course, the CSI measurement subframe can also be directly read, and no judgment is needed.

After the current subframe is a CSI measurement subframe, the signal parameter of the current downlink antenna is measured according to each CSI measurement subframe, and the antenna selection module selects an optimal uplink antenna as the uplink signal transmission antenna according to the signal parameter, and passes the The selected uplink signal transmitting antenna transmits an uplink signal to the network side.

In this embodiment, according to the 3GPP standard protocol version number 3GPP TS 36.213, since the technical standard is for a specific UE, the UE knows which subframes to perform CSI measurement. Through the algorithm specified in the technical standard, the UE may determine a CSI measurement subframe of the downlink antenna, and then measure a signal parameter of the downlink antenna according to each CSI measurement subframe. Certainly, the CSI measurement subframe of the downlink antenna may also be determined by using other standard protocols or other technical standards, and then the signal parameters of the downlink antenna are measured according to each CSI subframe. This embodiment can be flexibly set according to actual needs.

The antenna selection module 300 is configured to select an uplink antenna that is optimal according to the signal parameter selection signal as an uplink signal transmission antenna.

After the signal measurement module 200 measures the signal parameters, the antenna selection module 300 selects an uplink antenna that is optimal according to the signal parameter as an uplink signal transmission antenna.

As an implementation manner, the signal measurement module 200 measures the signal parameters of the downlink antenna. Afterwards, the antenna selection module 300 can separately compare different signal parameters according to an algorithm specified in the current technical standard, and select an uplink antenna with the best signal as the uplink signal transmission antenna according to the comparison result. Of course, the antenna selection module 300 may also not compare the signal parameters. For example, different technical parameters may be directly evaluated according to current technical standards, and an uplink antenna with an optimal signal is selected as an uplink signal transmitting antenna according to the evaluation result.

In this embodiment, the uplink and downlink channels have the same spectrum in the TDD-LTE technology, and therefore the uplink channel and the downlink channel have a high correlation reciprocity, and an uplink antenna selection method is proposed. The method is based on the downlink measurement method. The CSI measurement subframe measurement of the antenna measures the signal parameters of the current downlink antenna, and acquires channel state information of the current downlink antenna. After the signal parameters are measured, the antenna selection module 300 selects an uplink antenna with the optimal signal as the uplink signal according to the signal parameter. The transmitting antenna avoids the use of the relevant open-loop antenna selection technology without utilizing the channel change, and the user equipment only periodically switches the uplink signal transmitting antenna, resulting in insufficient antenna gain and waste of performance, and avoids the related closed-loop antenna selection technique. The antenna selection error due to the feedback delay in the high-speed movement state. In this embodiment, the gain and performance of the antenna can be ensured, and the accuracy and reliability of the reported information in the high-speed mobile state of the terminal can be improved, and the user can obtain better voice and data services.

Optionally, FIG. 7 is a schematic structural diagram of an antenna selection module of an uplink antenna selection apparatus according to an embodiment of the present invention.

Based on the embodiment shown in FIG. 5, the antenna selection module 300 may include:

The comparing unit 310 is configured to compare the signal quality parameter and the signal strength parameter of the downlink antenna, respectively.

The selecting unit 320 is configured to select an uplink antenna with the best signal as the uplink signal transmitting antenna according to the comparison result.

The signal parameters that can be obtained by the UE according to the CSI measurement subframe measurement in this embodiment include a signal quality parameter RSRQ and a signal strength parameter RSRP. Of course, the measured signal parameters are not limited to RSRQ and RSRP. For example, the received signal strength indicator RSSI (Received Signal Strength Indicator) or the signal to interference plus noise ratio SINR (Signal to Interference plus Noise) Signal parameters such as Ratio can be flexibly set according to actual needs.

After the signal measurement module 300 measures the signal quality parameter RSRQ and the signal strength parameter RSRP of the downlink antenna, the comparing unit 310 compares the RSRQ and the RSRP respectively, and obtains a corresponding comparison result, and the selecting unit 320 selects according to the comparison result. The uplink antenna with the best signal is used as the uplink signal transmitting antenna.

After the signal measurement module 300 measures the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 1, and measures the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 2, the comparison unit 310 compares the RSRQ and the RSRP, respectively. The comparing unit 310 can preferentially compare the signal quality parameters of the antenna 1 and the antenna 2, that is, compare the RSRQ values, and obtain a corresponding signal quality parameter comparison result. If the comparison result shows that the RSRQ values of the antenna 1 and the antenna 2 are different, the selecting unit 320 is configured according to The result selects an antenna with the best signal quality from the antenna 1 and the antenna 2 as an uplink signal transmitting antenna, thereby completing the selection of the uplink antenna. Of course, the comparing unit 310 can also preferentially compare the signal strength parameters of the antenna 1 and the antenna 2, that is, compare the RSRP values. In this embodiment, flexible settings can be made according to actual needs.

For example, in a channel state information measurement subframe, the signal measurement module 200 measures the RSRP and RSRQ values of the current downlink antenna 1 and the downlink antenna 2, respectively, and the measurement result records are as shown in Table 4:

天线antenna	RSRP值RSRP value	RSRQ值RSRQ value
11	-85-85	-5-5
22	-87-87	-7-7

Table 4

The comparing unit 310 can compare the signal quality parameters preferentially, that is, compare the RSRQ values of the antenna 1 and the antenna 2. From the above table, it can be compared that the RSRQ values of the antenna 1 and the antenna 2 are different, so that the antenna with the best signal quality is selected as the uplink signal. The transmitting antenna, since the RSRQ value of the antenna 1 is better than the antenna 2, the selecting unit 320 selects the antenna 1 as an uplink signal transmitting antenna.

In this embodiment, since the signal parameters of each of the downlink antennas measured by the terminal may be more than one, in this embodiment, the signal parameters are set to be prioritized by setting a priority mode. First, the parameters that characterize the signal quality are compared. If the signal quality parameters of each antenna are different, the uplink antenna with the best signal is directly selected from the downlink antenna as the uplink signal transmitting antenna according to the comparison result, and the signal strength parameter does not need to be compared. In this embodiment, the UE can compare and process the signal parameters of the downlink antenna according to a preset priority, so as to correctly and efficiently select the uplink antenna with the optimal signal.

Optionally, referring to FIG. 8, the comparing unit 310 is configured to compare signal strength parameters of the downlink antenna when the signal quality parameters of the downlink antennas are the same;

The selecting unit 320 is configured to: when the signal strength parameters of the downlink antennas that are compared by the comparing unit 310 are different, select an uplink antenna with the best signal strength parameter as the uplink signal transmitting antenna.

After the signal measurement module 200 measures the signal quality parameter RSRQ and the signal strength parameter RSRP of the downlink antenna, the comparing unit 310 compares the RSRQ and the RSRP respectively, and obtains a corresponding comparison result, and the selecting unit 320 selects according to the comparison result. The uplink antenna with the best signal is used as the uplink signal transmitting antenna.

The signal measurement module 200 compares the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 1 and the signal quality parameter RSRQ and the signal strength parameter RSRP of the antenna 2, respectively, and compares the RSRQ and the RSRP. The comparing unit 310 can preferentially compare the signal quality parameters of the antenna 1 and the antenna 2, that is, compare the RSRQ values to obtain a corresponding signal quality parameter comparison result, and when the result shows that the RSRQ values of the two antenna records are the same, the comparing unit 310 Comparing the signal strength parameters of the antenna 1 and the antenna 2, that is, comparing the RSRP values, the corresponding signal strength parameter comparison result is obtained, and the selecting unit 320 selects the antenna with the best signal strength from the antenna 1 and the antenna 2 as the uplink signal transmitting antenna according to the result. , thus completing the selection of the uplink antenna.

For example, under a channel state information measurement subframe, the signal measurement module 200 measures the RSRP and RSRQ values of the current downlink antenna 1 and the downlink antenna 2, respectively, and the measurement result records are as shown in Table 5:

天线antenna	RSRP值RSRP value	RSRQ值RSRQ value
11	-85-85	-5-5
22	-83-83	-5-5

table 5

When the downlink RSRQ measurements recorded by the two antennas are the same, the comparing unit 310 compares the signal strength parameters, that is, compares the RSRP values of the antenna 1 and the antenna 2. It can be compared from the above table that the RSRQ values of the antenna 1 and the antenna 2 are the same, but the RSRP value of the antenna 2 is better than that of the antenna 1, and the selection unit 320 selects the antenna 2 as the uplink signal transmitting antenna.

Through the above description, in this embodiment, the comparison priority of the signal quality parameter can be set to be higher than the signal strength parameter. When the signal quality parameters of each downlink antenna are different, the UE can select the uplink antenna by comparing the signal quality parameters of the uplink antenna, thereby ensuring the implementation efficiency; when the signal quality parameters of each downlink antenna are the same, the UE needs Then compare the signal strength parameters to achieve the selection of the uplink antenna.

Of course, in other implementations, the signal quality parameter may not be set to have a higher priority than the signal strength parameter, and the priorities of the two are the same or not, and the signal quality parameters and the signal strength parameters of the downlink antenna are separately performed. Comparing and selecting the uplink antenna with the best signal as the uplink signal transmitting antenna according to the comparison result, specifically, comparing the signal quality parameter and the signal strength parameter of the downlink antenna simultaneously, obtaining the comparison result, and then comparing according to each downlink antenna In the result, the corresponding uplink antenna is selected, and the selection process may refer to the foregoing process. Of course, the corresponding overall score may be determined according to the comparison result of the signal quality parameter and the signal strength parameter, so that the downlink antenna corresponding to the highest overall score may be selected. Uplink antenna.

Optionally, the uplink antenna selection device may further acquire a moving speed of the user terminal; Whether the moving speed is greater than or equal to a preset value; if the moving speed of the current user terminal is greater than or equal to a preset value, the open loop antenna selection mode is enabled.

In this embodiment, the preset speed of the UE is 120 km/h, and in other implementations, the preset value can be flexibly set. When the network side determines that the moving speed of the UE is greater than or equal to 120 km/h, it is determined that the UE is in a high-speed moving state at this time, and the open-loop antenna selection mode is enabled; when it is determined that the moving speed of the UE is less than 120 km/h, it is determined that the UE does not At high speed, it is not necessary to enable the open loop antenna selection mode, but the associated closed loop antenna selection mode.

The above is only an alternative embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The scope of the invention is also included in the scope of patent protection of the present application. The embodiment of the invention further provides a computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed The uplink antenna selection method is implemented.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software. A person skilled in the art should understand that the technical solutions of the present application can be modified or equivalent, without departing from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Industrial applicability

The above technical solution can ensure the gain and performance of the antenna, improve the accuracy and reliability of the reported information in the high-speed mobile state of the terminal, and thus enable the user to obtain better voice and data services.

Claims

An uplink antenna selection method, the method comprising:

Reading the current subframe of the downlink antenna when the open loop antenna selection mode is enabled;

When the current subframe is a channel state information measurement subframe, measuring a signal parameter of the current downlink antenna according to each channel state information measurement subframe;

The uplink antenna with the best signal selection signal is used as the uplink signal transmitting antenna according to the signal parameter.
The method of claim 1 , wherein the signal parameter comprises a signal quality parameter and a signal strength parameter, and the uplink antenna that is optimal according to the signal parameter selection signal is used as an uplink signal transmission antenna, and includes:

Performing a first comparison on the signal quality parameters of each downlink antenna, performing a second comparison on the signal strength parameters of each downlink antenna, and selecting the optimal signal according to the result of the first comparison and the result of the second comparison The uplink antenna acts as an uplink signal transmission antenna.
The method according to claim 2, wherein said performing a first comparison of signal quality parameters of each downlink antenna, performing a second comparison of signal strength parameters of each downlink antenna, and according to the result of said first comparison And the result of the second comparison is that the uplink antenna with the best selection signal is used as the uplink signal transmitting antenna, including:

Comparing the signal quality parameters of each downlink antenna, when the signal quality parameters of the downlink antenna are different, the uplink antenna with the best signal quality parameter is selected as the uplink signal transmitting antenna.
The method according to claim 3, wherein said performing a first comparison on a signal quality parameter of each downlink antenna, performing a second comparison on a signal strength parameter of each downlink antenna, and based on the result of said first comparison The uplink antenna with the best selection signal as the result of the second comparison as the uplink signal transmitting antenna further includes:

Comparing signal strength parameters of each downlink antenna when the signal quality parameters of the downlink antennas are the same;

When the signal strength parameters of the downlink antenna are different, an uplink antenna with the best signal strength parameter is selected as the uplink signal transmitting antenna.
The method of claim 1 wherein said measuring subframe measurements based on each channel state information Before the signal parameters of the current downlink antenna, the method further includes:

Determining whether the current subframe is the channel state information measurement subframe;

If the subframe is not measured for the channel state information, the step of performing the reading of the current subframe of the downlink antenna is returned.
An uplink antenna selection device, the device comprising:

The reading module is configured to read the current subframe of the downlink antenna when the open loop antenna selection mode is enabled;

The signal measurement module is configured to: when the current subframe is a channel state information measurement subframe, measure a signal parameter of the current downlink antenna according to each channel state information measurement subframe;

The antenna selection module is configured to select an uplink antenna that is optimal according to the signal parameter selection signal as an uplink signal transmission antenna.
The apparatus of claim 6 wherein: said signal parameters comprise signal quality parameters and signal strength parameters, said antenna selection module comprising:

a comparing unit, configured to perform a first comparison on a signal quality parameter of each downlink antenna, and perform a second comparison on a signal strength parameter of each downlink antenna;

The selecting unit is configured to select, as the uplink signal transmitting antenna, an uplink antenna that is optimal according to the result of the first comparison and the result of the second comparison.
The apparatus according to claim 7, wherein

The comparing unit is configured to: compare signal quality parameters of each downlink antenna;

The selecting unit is configured to: when the signal quality parameters of the downlink antennas that are compared by the comparing unit are different, select an uplink antenna with the best signal quality parameter as the uplink signal transmitting antenna.
The device of claim 8 wherein

The comparing unit is configured to: when the signal quality parameters of the downlink antennas are the same, compare signal strength parameters of each downlink antenna;

The selecting unit is configured to: when the signal strength parameters of the downlink antennas that are compared by the comparing unit are different, select an uplink antenna with an optimal signal strength parameter as an uplink signal transmitting antenna.
The apparatus of claim 6 further comprising:

a determining module, configured to determine whether the current subframe is the channel state information measurement subframe; if the channel state information measurement subframe is, invoking the signal measurement module to measure a subframe measurement according to each channel state information The signal parameters of the current downlink antenna;

If the subframe is not measured for the channel state information, the reading module is called to read the current subframe of the downlink antenna.