WO2020000217A1

WO2020000217A1 - Frequency band selection method and apparatus

Info

Publication number: WO2020000217A1
Application number: PCT/CN2018/092955
Authority: WO
Inventors: 邓猛; 沈秀勇; 张茜; 徐国琴
Original assignee: 华为技术有限公司
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2020-01-02
Also published as: CN111543075A; CN111543075B

Abstract

A frequency band selection method and apparatus, which provide a solution for selecting a suitable band from multiple bands when a frequency point for neighboring cell measurement is covered by the multiple bands, so as to carry out neighboring cell measurement by means of a radio-frequency channel corresponding to the band. The method comprises: determining multiple candidate bands corresponding to a frequency point for neighboring cell measurement carried out by a user equipment, wherein each candidate band from among the multiple candidate bands covers this frequency point; and according to the performance of a radio-frequency channel corresponding to each candidate band from among the multiple candidate bands, selecting a measurement band when the user equipment carries out neighboring cell measurement.

Description

Method and device for selecting frequency band

Technical field

The present application relates to the field of communication technologies, and in particular, to a method and a device for selecting a frequency band.

Background technique

In some scenarios (for example, before cell switching or cell reselection), the user equipment needs to perform neighbor cell measurement, perform performance evaluation on the neighbor cell of the current serving cell, and select a neighbor cell with better performance. Before performing neighboring cell measurement, the serving base station of the user equipment sends the neighboring cell measurement configuration parameters to the user equipment. The user equipment may determine a frequency point for performing neighboring cell measurement and a frequency band (band) covering the frequency point according to the neighboring cell measurement configuration parameter, and perform neighboring cell measurement through a radio frequency (RF) channel corresponding to the frequency band.

According to the frequency band division rules, the frequency points used for neighboring cell measurement may be covered by multiple frequency bands. Therefore, how to select a suitable frequency band from multiple frequency bands for user equipment to perform neighboring cell measurement through the radio frequency channel corresponding to the frequency band Urgent issues to be addressed.

Summary of the invention

The embodiments of the present application provide a method and a device for selecting a frequency band, and when a frequency point for performing neighboring cell measurement is covered by multiple frequency bands, a solution for selecting an appropriate frequency band from multiple frequency bands is provided so as to pass the corresponding frequency band. The RF channel performs neighboring cell measurements.

In a first aspect, an embodiment of the present application provides a frequency band selection method. The method includes the following steps: determining a plurality of candidate frequency bands corresponding to frequency points used by a user equipment for neighboring cell measurement, and each candidate frequency band in the plurality of candidate frequency bands. Both cover this frequency point; according to the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands, a measurement frequency band is selected when the user equipment performs neighboring cell measurement.

Among them, the frequency point used for performing neighbor cell measurement can be understood as the center frequency point of a signal to be measured in a neighbor cell of the current serving cell. By measuring a reference signal at the frequency point, performance evaluation can be performed on the neighbor cell. In addition, the function of the frequency point is not specifically limited in the embodiments of the present application. For example, the frequency point can be applied to the measurement process of neighboring cells, and can also be used in measurement processes such as cell search, cell initial measurement, and interference measurement. The example only restricts how to select the measurement frequency band during the measurement of the frequency point, and does not specifically limit the type of the measurement process.

Adopting the frequency band selection method provided in the first aspect, selecting a measurement frequency band for performing adjacent cell measurement from a plurality of candidate frequency bands covering the frequency points at which the user performs adjacent cell measurement according to the performance of the radio frequency channels corresponding to the multiple candidate frequency bands . With this solution, a method for selecting a measurement frequency band can be provided when multiple candidate frequency bands cover the frequency point, and a phenomenon that the user equipment cannot select a measurement frequency band can be avoided. In addition, this scheme can be used to screen out measurement bands with better performance. Adjacent cell measurement based on this measurement frequency band can obtain ideal measurement results.

In the method provided by the first aspect, the method of determining multiple candidate frequency bands is not unique. Here are three of them.

method one

Before determining multiple candidate frequency bands, the absolute wireless frequency point number ARFCN of the frequency point and the indication information of the sub-carrier interval SCS sent by the serving base station of the user equipment may be received. Multiple candidate frequency bands can be determined based on ARFCN and SCS.

The multiple candidate frequency bands determined in the first manner are all frequency bands covering the frequency point. With the above solution, multiple candidate frequency bands that can be used for neighboring cell measurement can be determined according to the neighboring cell measurement configuration parameters configured by the serving base station.

Way two

Before determining multiple candidate frequency bands, a candidate frequency band list sent by a serving base station of the user equipment may be received, where the candidate frequency band list is used to indicate multiple candidate frequency bands. The frequency bands indicated by the candidate frequency band list sent by the serving base station are all frequency bands supported by the serving base station.

The multiple candidate frequency bands determined by using the second method are candidate frequency bands that cover the frequency point and supported by the base station, that is, the multiple candidate frequency bands determined by using the second method may not cover all frequency bands at the frequency point. With the above solution, multiple candidate frequency bands that can be used for neighboring cell measurement can be determined according to the neighboring cell measurement configuration parameters configured by the serving base station.

Way three

After the candidate frequency bands are determined in the first or second way, these frequency bands can be further filtered to select candidate frequency bands supported by the hardware capabilities of the user equipment as the “multiple candidate frequency bands” described in the method provided in the first aspect. . That is, the multiple candidate frequency bands are candidate frequency bands supported by the hardware capabilities of the user equipment.

With the foregoing solution, the determined multiple candidate frequency bands are frequency bands supported by the hardware capability of the user equipment, and therefore the measurement frequency band selected from the multiple candidate frequency bands must be a frequency band supported by the hardware capability of the user equipment. Therefore, by adopting the foregoing solution, the measurement frequency band finally selected can be supported by the user equipment and can be used for neighboring cell measurement.

In one possible design, the performance of the RF channel includes the noise figure of the RF channel.

In a possible design, the performance of the RF channel includes the IQ channel imbalance index of the RF channel.

In one possible design, the performance of the RF channel includes the phase noise of the RF channel.

That is, in the embodiment of the present application, the performance of the radio frequency channel may be one or more of a noise figure of the radio frequency channel, an imbalance index of the IQ channel, and phase noise.

It should be noted that if the performance of the radio frequency channel includes multiple of the above three performance parameters, then when measuring the performance of the radio frequency channel, multiple performance parameters may also be weighted.

In a possible design, after the measurement frequency band is selected, the neighboring cell measurement may also be performed through a radio frequency channel corresponding to the measurement frequency band.

In specific implementation, the user equipment may store the performance of a radio frequency channel corresponding to each candidate frequency band in a plurality of candidate frequency bands. When the measurement frequency band is selected according to the performance of the radio frequency channel corresponding to each candidate frequency band, the candidate frequency band corresponding to the radio frequency channel with the best performance can be selected as the medium selection according to the performance measurement result of the radio frequency channel corresponding to each candidate frequency band. For example, the candidate frequency band corresponding to the radio frequency channel with the lowest noise figure is selected as the selected measurement frequency band, or the candidate frequency band corresponding to the radio frequency channel with the lowest IQ channel imbalance index is selected as the selected measurement frequency band.

In addition, after the measurement frequency band is selected, multiple determined candidate frequency bands may be reported to the serving base station of the user equipment.

The user equipment reports multiple candidate frequency bands to the serving base station, so that when the serving base station subsequently configures the user equipment for neighboring cell measurement again, it configures the neighboring cell measurement configuration parameters with reference to the candidate frequency band reported by the user equipment. For example, the multiple candidate frequency bands reported by the user equipment are candidate frequency bands determined in the foregoing manner (ie, the frequency bands supported by the user equipment). Then, when the serving base station configures the neighboring cell measurement configuration parameters again, the serving base station may instruct the user equipment to perform the neighboring cell measurement on a certain frequency band among the reported candidate frequency bands, so as to avoid a phenomenon that the user equipment does not support.

Further, after the measurement frequency band is selected, the measurement frequency band selected by the user equipment may be reported to the serving base station, or the performance priority of the radio frequency channels corresponding to multiple candidate frequency bands may be reported.

With the above solution, after the user equipment reports the measurement frequency band, the serving base station may indicate that the frequency band of the target cell is the measurement frequency band when it subsequently informs the user equipment to perform cell switching; the user equipment reports the performance of the radio frequency channels corresponding to multiple candidate frequency bands. After ranking, the serving base station may instruct the user equipment to perform a cell handover, and may indicate that the frequency band of the target cell is the candidate frequency band with the highest priority. In addition, the serving base station prioritizes based on the reported performance of the radio frequency channels corresponding to the multiple candidate frequency bands, and can subsequently configure the candidate frequency bands with higher priority when configuring neighboring cell measurement configuration parameters for the user equipment.

Before selecting the measurement frequency band by performing the frequency band selection method provided in the first aspect above, the user equipment may first compare the ARFCN and SCS of the frequency points used for neighboring cell measurement with the ARFCN and SCS of the measurement frequency point of the current serving cell. If the ARFCN and SCS of the two frequency points are the same, the frequency band of the current serving cell can be used as the above-mentioned measurement frequency band for neighboring cell measurement. If the ARFCN and SCS of the two frequency points are not completely consistent, the method provided in the first aspect may be used to select a measurement frequency band and perform neighboring cell measurement.

In addition, in the method provided in the first aspect, after a plurality of candidate frequency bands are determined, a candidate frequency band may be directly selected randomly from the plurality of candidate frequency bands as a measurement frequency band. For example, if the determined multiple candidate frequency bands are candidate frequency bands supported by both the base station and the user equipment, any one of the multiple candidate frequency bands may be used as a measurement frequency band for neighboring cell measurement.

In a second aspect, an embodiment of the present application further provides another method for selecting a frequency band. The method includes the following steps: determining a plurality of candidate frequency bands corresponding to frequency points used by the user equipment for neighboring cell measurement, each of the plurality of candidate frequency bands The candidate frequency bands all cover this frequency point; according to the frequency range corresponding to each candidate frequency band in the multiple candidate frequency bands, a measurement frequency band for user equipment to perform neighboring cell measurement is determined. The selected measurement frequency band may be the smallest candidate frequency band among a plurality of candidate frequency bands.

In specific implementation, the frequency range corresponding to each candidate frequency band can be calculated according to the frequency band related information recorded in the NV file of the user equipment (such as the starting frequency and upper limit frequency, starting ARFCN and upper limit ARFCN), such as the frequency range of a certain frequency band. It may be the difference between the upper limit frequency of the frequency band and the starting frequency, or the difference between the frequency corresponding to the upper limit ARFCN of the frequency band and the frequency corresponding to the starting ARFCN.

After the measurement frequency band for neighboring cell measurement is selected, subsequent operations are similar to the method provided in the first aspect, and are not repeated here.

With this solution, then, for the filter in the radio frequency channel corresponding to the measurement frequency band, the bandwidth of the filter can be set smaller, thereby reducing the interference of out-of-band interference on the transmission signal in the radio frequency channel.

According to a third aspect, an embodiment of the present application provides a frequency band selection device. The device includes a determination module and a selection module. A determination module, configured to determine multiple candidate frequency bands corresponding to frequency points used by the user equipment for neighboring cell measurement, each candidate frequency band in the multiple candidate frequency bands covering the frequency point; a selection module, configured to For the performance of the radio frequency channel corresponding to each candidate frequency band, the measurement frequency band is selected when the user equipment performs neighboring cell measurement.

In a possible design, the device further includes a measurement module, configured to perform a neighboring cell measurement through a radio frequency channel corresponding to the measurement frequency band selected by the selection module after the measurement frequency band is selected by the selection module.

In a possible design, the apparatus further includes a first receiving module, configured to receive the absolute wireless frequency point number ARFCN and the subcarrier interval of the frequency points sent by the serving base station of the user equipment before the determining module determines multiple candidate frequency bands. SCS indication information, ARFCN and SCS are used by the determination module to determine multiple candidate frequency bands.

In a possible design, the apparatus further includes a second receiving module, configured to receive a candidate frequency band list sent by the serving base station of the user equipment before the determining module determines multiple candidate frequency bands, and the candidate frequency band list is used to indicate multiple candidate frequency bands Frequency band.

The second receiving module and the first receiving module may be the same module or two independent modules.

In a possible design, the user equipment stores the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.

In a possible design, the multiple candidate frequency bands are candidate frequency bands supported by the hardware capabilities of the user equipment.

In a possible design, the apparatus further includes a first sending module, configured to report multiple candidate frequency bands to the serving base station of the user equipment after the selection module selects the measurement frequency band.

In a possible design, the apparatus further includes a second sending module, configured to report the performance ranking of the radio frequency channels corresponding to the candidate frequency bands to the serving base station of the user equipment after the selection module selects the measurement frequency band.

The second sending module and the first sending module may be the same module, or may be two independent modules.

According to a fourth aspect, an embodiment of the present application provides a frequency band selection device, which includes a processor, the processor is coupled to a memory, and reads instructions in the memory, and is configured to execute the first aspect or the foregoing first The method described in any one aspect or any one aspect of the second aspect.

In a possible design, the frequency band selection device may be a central processing unit chip, a baseband processor chip, or user equipment.

In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium for storing a computer used to execute a function designed in any one of the first to second aspects or any one of the aspects. Software instructions, which include a program designed to execute any one of the first aspect to the second aspect or any one of the designs above.

According to a sixth aspect, an embodiment of the present application provides a computer program product including instructions, which when executed on a computer, causes the computer to execute the foregoing first aspect or any one or any of the foregoing first to second aspects Any of the aspects design the method described.

In addition, for the technical effects brought by any one of the possible design methods in the second aspect to the sixth aspect, refer to the technical effects brought by the different design methods in the first aspect, which will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an application scenario according to an embodiment of the present application;

2 is a schematic structural diagram of a radio frequency channel according to an embodiment of the present application;

3 is a schematic flowchart of a frequency band selection method according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a frequency band selection apparatus according to an embodiment of the present application.

detailed description

As described in the background art, before the user equipment performs cell handover or cell reselection, it needs to perform neighbor cell measurement, so as to perform performance evaluation on the neighbor cell of the current serving cell to select a neighbor cell with better performance. Before performing neighboring cell measurement, the serving base station sends the neighboring cell measurement configuration parameters to the user equipment. The user equipment can determine the frequency point for performing neighboring cell measurement and a frequency band covering the frequency point according to the neighboring cell measurement configuration parameters. For each frequency band, there is a corresponding radio frequency channel, so the user equipment can pass The radio frequency channel corresponding to the selected frequency band is used for neighboring cell measurement, that is, the reference signal at the frequency point is received through the radio frequency channel corresponding to the selected frequency band, and the above-mentioned neighboring cell measurement process is completed by measuring the reference signal.

As we all know, in order to use spectrum resources reasonably, the spectrum resources of communication systems are usually divided into multiple frequency bands, and each frequency band corresponds to a specific frequency range. For example, in a long term evolution (LTE) system, the frequency range of band 38 is 2570 MHz to 2620 MHz, and the frequency range of band 41 is 2496 MHz to 2690 MHz. In a new radio (NR) system, the frequency of band 38 The frequency range is 2570MHz ～ 2620MHz, and the frequency range of band41 is 2496MHz ～ 2690MHz. In addition, according to the frequency band division rules, for a certain frequency point, the frequency point may be covered by multiple frequency bands. For example, in the LTE system, the 2580MHz frequency point is covered by both band 38 and band 41.

Based on the introduction of the above frequency bands and frequency points, it is not difficult to see that the frequency points used for neighboring cell measurement may be covered by multiple frequency bands. Then, the number of frequency bands covering the frequency point determined by the user equipment according to the neighboring cell measurement configuration parameters issued by the serving base station may be multiple (that is, multiple frequency bands cover the above-mentioned frequency points for performing neighboring cell measurement). In this case, how to select a suitable frequency band from a plurality of frequency bands covering the frequency point, and then perform adjacent cell measurement through a radio frequency channel corresponding to the frequency band is an urgent problem to be solved.

Specifically, the neighboring cell measurement configuration parameter issued by the serving base station may include an absolute frequency point number (absolute, radio frequency, channel number, or ARFCN). The ARFCN may be used to indicate the above-mentioned frequency point number of the frequency point for performing neighboring cell measurement, and the user equipment. After receiving the ARFCN, the frequency points used for neighboring cell measurement can be determined. In the LTE system, the ARFCN can be an evolved UMTS terrestrial radio access network absolute frequency point number (evolved UMTS terrestrial radio access network network absolute frequency channel number, EARFCN); in the NR system, the ARFCN can be a new air interface-absolute frequency point Number (new radio-absolute radio frequency channel number, NR-ARFCN).

Among them, according to the EARFCN numbering rules in the LTE protocol (3GPP TS 36.101), the frequency band corresponding to an EARFCN is uniquely determined. That is, when the same frequency point is covered by multiple frequency bands, the same frequency point is identified by different EARFCN on different frequency bands. Therefore, even if the frequency points used for neighboring cell measurement are covered by multiple frequency bands, the user equipment can determine the only frequency band according to the EARFCN issued by the serving base station. For example, in the LTE system, the frequency range of band 38 is 2570 MHz to 2620 MHz, and the frequency range of band 41 is 2496 MHz to 2690 MHz. These two frequency bands overlap in the frequency range of 2570MHz to 2620MHz. Take the frequency of 2570MHz as an example. On band 38, the earfcn corresponding to this frequency is 37750; on band 41, the earfcn corresponding to this frequency is 40390.

According to the NR-ARFCN numbering rule in the NR protocol (3GPP TS 38.101), NR-ARFCN represents an absolute frequency point. An NR-ARFCN can correspond to multiple frequency band numbers, that is, when the same frequency point is covered by multiple frequency bands, The same frequency point is identified by the same NR-ARFCN in different frequency bands. Therefore, according to the NR-ARFCN, multiple frequency band numbers can be determined, and unique frequency band numbers cannot be determined. For example, in an NR system, the frequency range of band 38 is 2570 MHz to 2620 MHz, and the frequency range of band 41 is 2496 MHz to 2690 MHz. These two frequency bands overlap in the frequency range of 2570MHz to 2620MHz. Take the frequency of 2620MHz as an example. On the band 38, the corresponding NR-ARFCN is 524000. On the band 41, the corresponding NR-ARFCN is 524000.

In some cases (for example, when the user equipment is in an idle state), the neighboring cell measurement configuration parameter may further include a candidate frequency band list, where the candidate frequency band list is used to indicate a frequency supported by the serving base station and covering the foregoing frequency for performing neighboring cell measurement. Point to all frequency bands. That is, the candidate frequency band included in the candidate frequency band list is not only a frequency band covering the frequency point, but also a frequency band supported by the serving base station. For example, in a long term evolution (LTE) system, the candidate band list may be a MultiBandInfoList; in a new air interface (NR) system, the candidate band list may be a MultiFrequencyBandListNR.

For the above two types of neighboring cell measurement configuration parameters, in general, the serving base station of the user equipment sends the ARFCN and candidate frequency band list when the user equipment is in an idle state, and the serving base station of the user equipment issues only the ARFCN when the user equipment is in a connected state.

In addition, the neighboring cell measurement configuration parameters may further include subcarrier spacing (SCS) of a frequency band used for neighboring cell measurement.

Based on the above introduction, it is not difficult to see that when the frequency points used for neighboring cell measurement are covered by multiple frequency bands, it is difficult for the user equipment to determine a unique frequency band according to the neighboring cell measurement configuration parameters issued by the serving base station, so as to pass the unique frequency band corresponding The RF channel performs neighboring cell measurements. The following lists two situations in which it is difficult for user equipment to determine a unique frequency band.

Scenario one

In the LTE system, the user equipment may determine a unique frequency band number according to the EARFCN, that is, determine a unique frequency band. However, the frequency band determined by the user equipment according to EARFCN may not be a frequency band supported by the user equipment. At this time, if the user equipment is in an idle state, it is necessary to consider how the user equipment covers the frequency points indicated by the MultiBandInfoList and covers the frequency points used for neighbor measurement. Select a frequency band from all frequency bands to perform neighboring cell measurement through the radio frequency channel corresponding to the frequency band.

Case two

In the NR system, the user equipment may determine a plurality of frequency bands that cover the above-mentioned frequency points for performing neighboring cell measurement according to the NR-EARFCN. At this time, if the user equipment is in an idle state, it is necessary to consider how the user equipment selects a frequency band from all the frequency bands indicated by the MultiFrequencyBandListNR to cover the frequency point, so as to perform neighboring cell measurement through the radio frequency channel corresponding to the frequency band; State, you need to consider how the user equipment combines other neighboring cell measurement configuration parameters to obtain all frequency bands covering the frequency point, and then select a frequency band from these frequency bands to perform neighboring cell measurement through the radio frequency channel corresponding to the frequency band.

It should be noted that the above two situations are merely examples. In actual implementation, under various conditions such as multiple communication systems and different conditions of user equipment, it involves user equipment to select a suitable frequency band from a plurality of candidate frequency bands, so as to perform neighboring cell measurement through a radio frequency channel corresponding to the frequency band. Situation. For these situations, the solutions provided in the embodiments of the present application are applicable.

Based on the above problems, the embodiments of the present application provide a method and a device for selecting a frequency band. When a frequency point for performing neighboring cell measurement is covered by multiple frequency bands, a solution for selecting an appropriate frequency band from multiple frequency bands is provided to pass The radio frequency channel corresponding to this frequency band is used for adjacent cell measurement.

In the following, first, the application scenarios of the embodiments of the present application are described.

The frequency band selection scheme provided in the embodiments of the present application can be applied to user equipment. The user equipment may be a device that provides voice and / or data connectivity to the user, a handheld device with a wireless connection function, or another processing device connected to a wireless modem. The name of the user device may be different in different systems. For example, the user equipment may also be called a terminal device.

Specifically, the frequency band selection scheme provided in the embodiment of the present application can be applied to a baseband chip. As shown in FIG. 1, the baseband chip is connected to a radio frequency chip, and the radio frequency chip is connected to an antenna. The baseband chip adopts the frequency band selection scheme provided in the embodiment of the present application to select a suitable measurement frequency band from a plurality of candidate frequency bands, thereby performing neighboring cell measurement through a radio frequency chip and a radio frequency channel corresponding to the measurement frequency band.

In terms of physical structure, the RF channel may include modules such as an antenna switch module, a filter, an amplifier, a mixer, an analog-to-digital conversion module / digital-to-analog conversion module. Taking the receiving channel as an example, a radio frequency channel for receiving signals in a radio frequency chip can be shown in FIG. 2. In terms of a signal receiving path, a radio frequency channel for receiving a signal includes an antenna switch module, a filter, an amplifier, a mixer, a filter, an amplifier, and an analog-to-digital conversion module in order. In other words, the signal received by the antenna passes through the antenna switch module, filter, amplifier, mixer, filter, amplifier, and analog-to-digital conversion module and then is transmitted to the baseband chip.

It should be noted that FIG. 2 only shows two radio frequency channels selected by the antenna switch module and used for receiving signals. In actual implementation, the embodiment of the present application deals with the radio frequency channels used for receiving signals in the radio frequency chip. The number is not specifically limited, and may be, for example, one, two, or four. In addition, only a radio frequency channel for receiving signals is shown in FIG. 2. In practical applications, the radio frequency chip also includes a radio frequency channel for transmitting signals.

It should be noted that, according to the integration requirements of the radio frequency chip, multiple radio chips may be integrated inside the radio frequency chip. The modules included in the radio frequency channel shown in FIG. 2 may be integrated in different chips inside the radio frequency chip, which is not specifically limited in the embodiment of the present application. That is to say, the embodiment of the present application is not limited to that all devices included in the radio frequency channel shown in FIG. 2 are distributed on a unified chip inside the radio frequency chip.

In addition, the RF channel of the RF chip may not include the analog-to-digital conversion module shown in FIG. 2. At this time, the analog-to-digital conversion module can be integrated in the baseband chip. That is, in downlink communication, the signal output by the radio frequency chip to the baseband chip is an analog signal, and the analog signal is converted into a digital signal by the baseband chip for subsequent processing. The radio frequency channel shown in FIG. 2 is only a specific example, and the physical structure of the radio frequency channel is not strictly limited in the embodiment of the present application.

In addition, in specific implementation, there may be a case where multiple radio frequency channels share certain devices, for example, two radio frequency channels may share a filter or a mixer, which is not specifically limited in the embodiment of the present application. When two devices share a filter or mixer, the signals in these two frequency bands are not transmitted at the same time.

As mentioned above, for each frequency band, there is a radio frequency channel corresponding to the user equipment. When the radio frequency channel is selected, the radio frequency channel can be used to transmit signals on the frequency band. It can also be understood as follows: For each frequency band, a set of radio frequency channel parameters corresponding to the user equipment exists. This group of RF channel parameters can be software configuration parameters of some modules in the RF channel shown in FIG. 2. For example, the RF channel parameter can be understood as the gating parameter of the antenna switch module, or it can be understood as the power-on parameter or enable parameter of the filter, mixer, amplifier, etc., or it can be understood as the filter and mixer , Amplifier, and other device parameters. After the radio frequency channel is configured through the radio frequency channel parameters corresponding to the frequency band, the radio frequency channel can be selected to be used for transmitting signals in the frequency band.

It should be noted that, in actual implementation, one radio frequency channel in the user equipment may be used to transmit signals on one frequency band, and may also be used to transmit signals on multiple frequency bands.

For example, the frequency resources of downlink communication are divided into 5 frequency bands. There are only 4 real radio frequency channels (such as the radio frequency channel shown in FIG. 2) for receiving signals in user equipment, which are called radio frequency channel a and radio frequency channel. b. RF channel c and RF pass d. At this time, a real radio frequency channel can be used to transmit signals on one frequency band, and can also be used to transmit signals on two frequency bands. For example, for some two frequency bands, band1 and band2, the signals on band1 and band2 can be transmitted through the radio frequency channel b. In specific implementation, the video channel b can be configured through different radio frequency channel parameters (for example, radio frequency channel parameters corresponding to band 1 and radio frequency channel parameters corresponding to band 2) to realize signal transmission on two frequency bands.

It should also be noted that if the number of frequency bands supported by the user equipment is small, for example, it is less than or equal to the number of radio frequency channels that physically exist in the user equipment. Then, in actual implementation, each radio frequency channel in the physical sense can only be used to transmit signals on one frequency band. For example, the frequency resources of downlink communication are divided into 4 frequency bands, which are called band1, band2, band3, and band4, and the corresponding radio frequency channel parameters are parameter A, parameter B, parameter C, and parameter D; the user equipment is used for receiving There are four real radio frequency channels of the signal (for example, the radio frequency channel shown in FIG. 2), which are called radio frequency channel a, radio frequency channel b, radio frequency channel c, and radio frequency pass d. Then, according to parameter A, radio frequency channel a can be configured to receive signals on band1; radio frequency channel b can be configured according to parameter B to receive signals on band2; radio frequency channel c is configured according to parameter C to receive signals on band3; D configures the radio frequency channel d to receive signals on band4.

The embodiments of the present application provide a method and a device for selecting a frequency band, which are used to select an appropriate frequency band from a plurality of frequency bands, so as to perform neighboring cell measurement through a radio frequency channel corresponding to the frequency band. Among them, the method and the device are based on the same inventive concept. Since the principle of the method and the device for solving the problem is similar, the implementation of the device and the method can be referred to each other, and duplicated details will not be repeated.

The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

It should be noted that, in the embodiments of the present application, multiple means two or more. In addition, it should be understood that in the description of this application, the terms "first" and "second" are used only for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor as indicating Or imply order.

Referring to FIG. 3, a frequency band selection method provided by an embodiment of the present application includes the following steps S301 to S302.

S301: Determine multiple candidate frequency bands corresponding to the frequency points used by the user equipment for neighboring cell measurement.

Wherein, each candidate frequency band in the multiple candidate frequency bands covers the frequency point (hereinafter referred to as the frequency point) for performing neighboring cell measurement. The frequency point used for neighboring cell measurement can be understood as the center frequency point of the signal to be measured in a neighboring cell of the current serving cell. By measuring the reference signal at this frequency point, the performance evaluation of the neighboring cell can be performed.

As mentioned earlier, according to the frequency band division rules, the frequency points used for neighboring cell measurement may be covered by multiple frequency bands. In S301, multiple candidate frequency bands can be regarded as multiple frequency bands covering the frequency point. For example, in the NR system, the frequency point used by the user equipment for neighboring cell measurement is a 2610 MHz frequency point. Then, when S301 is performed, the multiple candidate frequency bands corresponding to the determined frequency point for neighboring cell measurement may be band 38. And band41.

It should be noted that due to different conditions such as the communication system, the state of the user equipment, and the candidate band selection principles, the multiple candidate bands determined in S301 may not cover all bands at the frequency point. The following describes several ways to determine multiple candidate frequency bands.

method one

Before determining multiple candidate frequency bands in S301, the ARFCN and SCS indication information of the frequency point sent by the serving base station of the user equipment may be received. Multiple candidate frequency bands can be determined based on ARFCN and SCS.

Among them, ARFCN includes but is not limited to the aforementioned EARFCN and NR-ARFCN.

For example, in the NR system, if the user equipment is in a connected state, before the user equipment performs neighbor cell measurement, it will receive the neighbor cell measurement configuration parameters issued by the serving base station, such as the indication information of NR-ARFCN and SCS. The user equipment combines the ARFCN and the SCS indicated by the serving base station to determine multiple candidate frequency bands covering the frequency point.

In addition, in the LTE system, the user equipment may directly determine multiple candidate frequency bands covering the frequency point according to the EARFCN issued by the serving base station.

That is, the multiple candidate frequency bands determined by using the first method may be all frequency bands covering the frequency point.

With the above solution, multiple candidate frequency bands that can be used for neighboring cell measurement can be determined according to the neighboring cell measurement configuration parameters configured by the serving base station.

Way two

Before determining multiple candidate frequency bands in S301, a candidate frequency band list sent by a serving base station of the user equipment may be received, and the candidate frequency band list is used to indicate multiple candidate frequency bands. The frequency bands indicated by the candidate frequency band list sent by the serving base station are all frequency bands supported by the serving base station. That is, the multiple candidate frequency bands determined in S301 are candidate frequency bands indicated by the candidate frequency band list.

The candidate frequency band list includes, but is not limited to, MultiBandInfoList and MultiFrequencyBandListNR. Of course, with the advancement of communication standards, the name of the candidate frequency band list may be changed. In the embodiments of the present application, the name of the candidate frequency band list is not specifically limited, as long as the candidate frequency band list can be used to indicate the coverage supported by the serving base station. Multiple candidate frequency bands at this frequency point are sufficient.

For example, in the LTE system, if the user equipment is in an idle state, before the user equipment performs neighbor cell measurement, it will receive the neighbor cell measurement configuration parameters, such as EARFCN and MultiBandInfoList, issued by the serving base station. According to the previous introduction, the user equipment can determine the only frequency band according to EARFCN. However, the frequency band determined according to EARFCN is not a frequency band supported by the user equipment. At this time, the user equipment needs to reselect a frequency band for neighboring cell measurement. Specifically, the user equipment may cover the frequency point indicated in the MultiBandInfoList and serve the base station. The supported candidate frequency bands are used as the multiple candidate frequency bands determined in S301, and then a measurement frequency band is selected from the multiple candidate frequency bands.

That is, the multiple candidate frequency bands determined by using the second method are candidate frequency bands that cover the frequency point and supported by the base station, that is, the multiple candidate frequency bands determined by using the second method may not cover all frequency bands at the frequency point.

Way three

After the user equipment determines all candidate frequency bands covering the frequency point according to the ARFCN and SCS, it can further screen these candidate frequency bands, select the candidate frequency bands supported by the user equipment, and use the candidate frequency bands obtained after the screening as multiple determined in S301. Candidate band.

The candidate frequency band supported by the user equipment can be understood as a candidate frequency band supported by the hardware capability of the user equipment. In actual implementation, a non-volatile (NV) file (ie, a file stored in a non-volatile memory) in the user equipment stores all frequency bands and related information that the user equipment can support. User equipment can determine the frequency bands it supports by querying the NV file. Then, by intersecting the frequency band supported by itself with the frequency band determined according to ARFCN and SCS, multiple candidate frequency bands described in S301 can be determined.

That is, the multiple candidate frequency bands determined by using the third method are candidate frequency bands that cover the frequency point and supported by the user equipment, that is, the multiple candidate frequency bands determined by using the third method may not cover all frequency bands at the frequency point.

Of course, in some cases, the number of candidate frequency bands selected by the third method is one. In this case, it is not necessary to perform S302, and the selected candidate frequency bands are directly used as measurement frequency bands for user equipment for neighboring cell measurement.

Way four

After the user equipment determines the candidate frequency bands that cover the frequency point and are supported by the serving base station according to the candidate frequency band list, these candidate frequency bands can be further filtered to select candidate frequency bands supported by the user equipment, and the candidate frequency bands obtained after screening are used as S301. Identify multiple candidate frequency bands.

The candidate frequency band supported by the user equipment can be understood as a candidate frequency band supported by the hardware capability of the user equipment. In actual implementation, the NV file in the user equipment stores all frequency bands and related information that the user equipment can support. User equipment can determine the frequency bands it supports by querying the NV file. Then, by intersecting the frequency band supported by itself with the frequency band determined according to the candidate frequency band list, multiple candidate frequency bands described in S301 can be determined.

That is, the multiple candidate frequency bands determined by using the fourth method are candidate frequency bands that cover the frequency point and supported by both the serving base station and the user equipment, that is, the multiple candidate frequency bands determined by using the fourth method may not be all frequency bands that cover the frequency point.

Of course, in some cases, the number of candidate frequency bands selected by the fourth method may be one. At this time, it is not necessary to perform S302, and the selected candidate frequency bands are directly used as measurement frequency bands for user equipment for neighboring cell measurement.

It is not difficult to see that in combination with the third and fourth methods, no matter which method is used to determine some candidate frequency bands that cover the frequency point, these candidate frequency bands can be further filtered, and multiple candidate frequency bands supported by the user equipment can be selected from them. The multiple candidate frequency bands can be regarded as the multiple candidate frequency bands determined in S301.

In the third or fourth method, the determined multiple candidate frequency bands are frequency bands supported by the hardware capability of the user equipment. Therefore, the measurement frequency band selected from the multiple candidate frequency bands must be a frequency band supported by the hardware capability of the user equipment. Therefore, by adopting the third method or the fourth method, the measurement frequency band finally selected can be supported by the user equipment, and can be used for neighboring cell measurement.

In particular, the multiple candidate frequency bands determined by using the fourth method are the frequency bands supported by the base station and the user equipment, and the measurement frequency band selected therefrom is also a frequency band supported by the base station and the user equipment. Performing neighboring cell measurement based on the measurement frequency band can avoid the Cases not supported by the base station or user equipment.

S302: Select a measurement frequency band when the user equipment performs neighboring cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.

In specific implementation, the user equipment may measure the performance of a radio frequency channel corresponding to each candidate frequency band among multiple candidate frequency bands in advance, and store the measurement result in the user equipment (for example, stored in an NV file of the user equipment). In the subsequent measurement of neighboring cells, multiple candidate frequency bands can be filtered based on the pre-measurement results.

In specific implementation, the user equipment may directly store the measurement result of the performance of the radio frequency channel corresponding to each candidate frequency band in the user equipment. Or, in order to save storage space, each frequency band may be sorted according to a measurement result of performance of a radio frequency channel corresponding to each candidate frequency band. When storing the relevant information of each frequency band in the NV file, the relevant information of the frequency bands can be stored in order according to the sorting order of the measurement results. The measurement result with the best result comes first, and the measurement result with the poor result comes next. Then, when the measurement frequency band is selected according to the performance of the radio frequency channel corresponding to each candidate frequency band, the frequency band corresponding to the information stored in the foremost frequency band can be selected as the selected measurement frequency band.

The performance of the radio frequency channel corresponding to the candidate frequency band can be understood as follows: As described above, for each candidate frequency band, a set of radio frequency channel parameters corresponding to the candidate frequency band can be determined. Then, after the radio frequency channel is configured according to the set of radio frequency channel parameters, the performance of the radio frequency channel transmission signal can be regarded as the performance of the radio frequency channel corresponding to the candidate frequency band.

For example, the parameter of the radio frequency channel corresponding to band1 is parameter A. After the radio frequency channel a is configured according to the parameter A, the noise figure of the radio frequency channel a during signal transmission can be regarded as the performance of the radio frequency channel corresponding to band1; The parameter of the radio frequency channel is parameter B. After the radio frequency channel b is configured according to the parameter B, the phase noise of the radio frequency channel b during signal transmission can be regarded as the performance of the radio frequency channel corresponding to band 2; for example, the radio frequency channel parameter corresponding to band 3 For parameter C, after the radio frequency channel c is configured according to the parameter C, the IQ channel imbalance index of the radio frequency channel c during signal transmission can be regarded as the performance of the radio frequency channel corresponding to band3.

Specifically, the performance of the radio frequency channel corresponding to the candidate frequency band may include one or more of a noise figure, an IQ channel imbalance index, or phase noise.

In specific implementation, when selecting a measurement frequency band according to the performance of the radio frequency channel corresponding to each candidate frequency band in S302, based on the performance measurement results of the radio frequency channel corresponding to each candidate frequency band stored in advance, the radio frequency channel corresponding to the best performance can be selected. The candidate frequency band is selected as the measurement frequency band in S302. For example, the candidate frequency band corresponding to the RF channel with the lowest noise figure is selected as the measurement frequency band in S302, or the candidate frequency band corresponding to the RF channel with the lowest IQ channel imbalance index is selected as the frequency measurement in S302. Selected measurement frequency band.

In addition, if the performance of the radio frequency channels corresponding to multiple candidate frequency bands is superior, further screening can be performed in combination with other conditions. For example, one of several candidate frequency bands with better performance may be selected as the measurement frequency band selected in S302; or, among the several candidate frequency bands with better performance, if a candidate frequency band matches the measurement frequency of the current serving cell If the corresponding measurement frequency points are the same, the candidate frequency band can be selected as the measurement frequency band selected in S302; the latter further filters the candidate frequency bands based on the hardware capabilities of the user equipment and selects a candidate frequency band supported by the user equipment as the selection in S302. Fixed measurement frequency band.

After performing S302, the neighboring cell measurement can be performed through the radio frequency channel corresponding to the measurement frequency band selected in S302. That is, the radio frequency channel is configured according to the radio frequency channel parameter corresponding to the measurement frequency band, and the corresponding radio frequency channel is opened to receive the reference signal at the frequency point, so that the performance of the neighboring cell corresponding to the frequency point is evaluated according to the measurement result of the reference signal.

Adopting the above scheme, neighboring cell measurement can be implemented based on the measurement frequency band selected by the frequency band selection scheme shown in FIG. 2, thereby providing a reference for user equipment to perform cell switching or cell reselection operations.

In addition, after the measurement frequency band is selected in S302, multiple candidate frequency bands determined in S301 may also be reported to the serving base station of the user equipment.

The user equipment reports multiple candidate frequency bands to the serving base station, so that when the serving base station subsequently configures the user equipment for neighboring cell measurement again, it configures the neighboring cell measurement configuration parameters with reference to the candidate frequency band reported by the user equipment. For example, the multiple candidate frequency bands reported by the user equipment are frequency bands determined by using the foregoing third method (that is, the frequency bands supported by the user equipment). Then, when the serving base station configures the neighboring cell measurement configuration parameters again, the serving base station may instruct the user equipment to perform the neighboring cell measurement on a certain frequency band among the reported candidate frequency bands, so as to avoid a phenomenon that the user equipment does not support.

Further, after the measurement frequency band is selected in S302, the measurement frequency band selected by the user equipment may be reported to the serving base station, or the performance priority of the radio frequency channels corresponding to multiple candidate frequency bands may be reported.

With the above solution, after the user equipment reports the measurement frequency band, the serving base station may indicate that the frequency band of the target cell is the measurement frequency band when it subsequently informs the user equipment to perform cell switching; the user equipment reports the performance of the radio frequency channels corresponding to multiple candidate frequency bands. After ranking, the serving base station may instruct the user equipment to perform a cell handover, and may indicate that the frequency band of the target cell is the candidate frequency band with the highest priority.

In addition, the serving base station prioritizes based on the reported performance of the radio frequency channels corresponding to the multiple candidate frequency bands, and can subsequently configure the candidate frequency bands with higher priority when configuring neighboring cell measurement configuration parameters for the user equipment.

In the embodiment of the present application, selecting a measurement frequency band according to the performance of a radio frequency channel corresponding to each candidate frequency band is a relatively important part. In the following, several specific examples are used to explain how to select the measurement frequency band when the user equipment performs neighboring cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.

Example one

Taking the performance of the RF channel corresponding to the candidate frequency band as the noise figure as an example, the noise figure (in dB) of the RF channel corresponding to each candidate frequency band that the user equipment can support is tested in advance in the laboratory, and then each candidate frequency band and the corresponding The noise figure is stored in the NV file of the user equipment, and the data format can be: [candidate band number, noise figure], [candidate band number, noise figure],... The user equipment can read the data in the NV file in the working state to obtain the noise figure corresponding to each candidate frequency band, and then can select the candidate frequency band with the smallest noise coefficient as the measurement frequency band.

Example two

Taking the performance of the radio frequency channel corresponding to the candidate frequency band as the noise figure as an example, the noise coefficient of the radio frequency channel corresponding to each candidate frequency band that the user equipment can support is tested in advance in the laboratory, and one candidate frequency band is defined according to the size of the noise coefficient. Priority: The candidate band with the smallest noise figure has a priority of 0, and in the order of increasing noise figure, the candidate bands have a priority of 1, 2, 3,... Then, each candidate frequency band and the corresponding priority are stored in the NV file of the user equipment, and the data format may be: [candidate frequency band number, priority], [candidate frequency band number, priority], .... The user equipment can read the data in the NV file in the working state to obtain the priority corresponding to each candidate frequency band, and then can select the candidate frequency band with the lowest priority as the measurement frequency band.

Example three

Taking the performance of the radio frequency channel corresponding to the candidate frequency band as the noise figure as an example, the noise coefficient of the radio frequency channel corresponding to each candidate frequency band that the user equipment can support is tested in advance in the laboratory, and all candidate frequency bands are ranked according to the magnitude of the noise coefficient. The candidate bands with the smallest coefficients are listed first, and are arranged in order, such as: 3, 1, 4, 27, .... The numbers represent candidate band numbers. The candidate frequency bands that the user equipment can support are then stored in the NV file of the user equipment in this order. The data format can be: [candidate frequency band number], [candidate frequency band number], .... The user equipment can read the data in the NV file in the working state, select the candidate frequency band with the smallest noise figure arranged at the forefront, and use this frequency band as the measurement frequency band.

Example four

In Example 4, the performance of the RF channel corresponding to the candidate frequency band is the comprehensive performance including the noise figure, the imbalance index of the IQ channel, and the phase noise. The candidate frequency bands are sorted according to the comprehensive performance of the noise channel, the IQ channel imbalance index, and the phase noise of each candidate frequency band. The ranking rule is based on the performance coefficient (noise coefficient + IQ channel imbalance index + phase noise) from small to large. Large ranking, then, select the candidate band with the smallest coefficient of performance as the measurement band.

The specific implementation method may be as follows: the performance coefficients of the RF channels corresponding to each candidate frequency band that the user equipment can support are tested in advance in the laboratory, and the candidate frequency bands are sorted according to the performance coefficient from small to large, and the candidate frequency band with the smallest performance coefficient is ranked At the top, they are arranged in order, such as: 3, 1, 4, 27, .... The numbers represent candidate band numbers. Then, each candidate frequency band that the user equipment can support is stored in the NV file of the user equipment in this order, and the data format can be: [candidate frequency band number], [candidate frequency band number], .... The user equipment can read the data in the NV file in the working state, select the candidate frequency band with the lowest performance coefficient arranged at the forefront, and use this frequency band as the measurement frequency band.

In addition, in Example 4, when calculating the coefficient of performance, the noise figure, IQ channel imbalance index, and phase noise can also be weighted separately. The operation process after weighting is similar to the foregoing process, and is not repeated here.

In summary, the frequency band selection scheme provided in the embodiment of the present application is used to select a neighboring cell from a plurality of candidate frequency bands covering the frequency points at which the user performs neighboring cell measurement according to the performance of the radio frequency channels corresponding to the multiple candidate frequency bands. The measurement frequency band of the measurement. With this solution, a method for selecting a measurement frequency band can be provided when multiple candidate frequency bands cover the frequency point, and a phenomenon that the user equipment cannot select a measurement frequency band can be avoided. In addition, this scheme can be used to screen out measurement bands with better performance. Adjacent cell measurement based on this measurement frequency band can obtain ideal measurement results.

The above is an introduction to the frequency band selection method provided by the embodiment of the present application. It should be noted that before selecting a measurement frequency band by performing the frequency band selection method shown in FIG. 3, the user equipment may first use the ARFCN and SCS of the frequency points used for neighboring cell measurement, and the ARFCN and SCS is compared. If the ARFCN and SCS of the two frequency points are the same, the frequency band of the current serving cell can be used as the above measurement frequency band for neighboring cell measurement. If the ARFCN and SCS of the two frequency points are not completely consistent, the method shown in FIG. 3 can be used to select a measurement frequency band and perform neighboring cell measurement.

In addition, after determining multiple candidate frequency bands in step S301, a candidate frequency band can also be directly selected as a measurement frequency band randomly from the multiple candidate frequency bands. For example, if the multiple candidate frequency bands determined in S301 are candidate frequency bands supported by both the base station and the user equipment, any one of the multiple candidate frequency bands may be used as a measurement frequency band for neighboring cell measurement.

An embodiment of the present application also provides another method for selecting a frequency band. The method includes the following steps: determining a plurality of candidate frequency bands corresponding to frequency points used by the user equipment for neighboring cell measurement, and each candidate frequency band in the plurality of candidate frequency bands is covered. The frequency point; determining a measurement frequency band in which the user equipment performs neighboring cell measurement according to a frequency range corresponding to each candidate frequency band in the multiple candidate frequency bands. The selected measurement frequency band may be the smallest candidate frequency band among a plurality of candidate frequency bands.

After the measurement frequency band for adjacent cell measurement is selected, subsequent operations are similar to the method shown in FIG. 3, and are not repeated here.

With this solution, the frequency range of the measurement frequency band that is finally selected for neighboring cell measurement is small. Then, for the filter in the radio frequency channel corresponding to the measurement frequency band, the bandwidth of the filter can be set smaller, thereby reducing the interference of the out-of-band interference on the transmission signal in the radio frequency channel.

Based on the same inventive concept, an embodiment of the present application further provides a frequency band selection device, which can be used to execute the frequency band selection method shown in FIG. 3. The device can be regarded as a baseband chip in FIG. 2 or a baseband processor in the baseband chip, and can also be regarded as a user equipment or a central processing unit in the user equipment.

Referring to FIG. 4, the frequency band selection apparatus 400 includes a determination module 401 and a selection module 402.

A determining module 401 is configured to determine a plurality of candidate frequency bands corresponding to the frequency points used by the user equipment to perform neighboring cell measurement, and each of the plurality of candidate frequency bands covers the frequency point.

A selection module 402 is configured to select a measurement frequency band when the user equipment performs neighboring cell measurement according to the performance of a radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.

Optionally, the apparatus 400 further includes a measurement module, configured to perform neighboring cell measurement through a radio frequency channel corresponding to the measurement frequency band selected by the selection module 402 after the measurement frequency band is selected by the selection module 402.

Optionally, the apparatus 400 further includes a first receiving module configured to receive, before the determining module 401 determines multiple candidate frequency bands, the absolute wireless frequency point number ARFCN and the subcarrier interval SCS indication sent by the serving base station of the user equipment. Information, ARFCN and SCS are used to determine module 401 to determine multiple candidate frequency bands.

Optionally, the apparatus 400 further includes a second receiving module, configured to receive a candidate frequency band list sent by the serving base station of the user equipment before the determining module 401 determines multiple candidate frequency bands, and the candidate frequency band list is used to indicate multiple candidate frequency bands.

Optionally, the user equipment stores performance of a radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands.

Optionally, the multiple candidate frequency bands are candidate frequency bands supported by the hardware capabilities of the user equipment.

Optionally, the apparatus 400 further includes a first sending module configured to report a plurality of candidate frequency bands to a serving base station of the user equipment after the selection module 402 selects a measurement frequency band.

Optionally, the apparatus 400 further includes a second sending module, configured to report the performance of the radio frequency channels corresponding to the candidate frequency bands to the serving base station of the user equipment after the selection module 402 selects the measurement frequency band.

Optionally, the performance of the radio frequency channel includes a noise figure of the radio frequency channel.

Optionally, the performance of the radio frequency channel includes an IQ channel imbalance index of the radio frequency channel.

It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. The functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist separately physically, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium , Including a number of instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks, and other media that can store program codes .

It should also be noted that the frequency band selection device 400 shown in FIG. 4 can be used to execute the method provided by the embodiment corresponding to FIG. 3, so the implementation and technical effects not described in detail in the frequency band selection device 400 shown in FIG. Related description in the method shown in FIG. 3.

Based on the same inventive concept, an embodiment of the present application further provides a frequency band selection device. The frequency band selection device may be used to execute the frequency band selection method shown in FIG. 3, and may also be regarded as the same device as the frequency band selection device 400 shown in FIG. 4. The device includes a processor, the processor is coupled to the memory, and reads instructions in the memory, and is used to execute the frequency band selection method shown in FIG. 3.

Optionally, the device may be a user equipment, a central processing unit chip, a baseband chip, or a baseband processor chip.

Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that instructions generated by the processor of the computer or other programmable data processing device may be used to Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and variations.

Claims

A method for selecting a frequency band, comprising:

Determining a plurality of candidate frequency bands corresponding to the frequency points used by the user equipment for neighboring cell measurement, each of the plurality of candidate frequency bands covering the frequency point;

Selecting a measurement frequency band when the user equipment performs neighboring cell measurement according to the performance of a radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.
The method according to claim 1, further comprising: after selecting the measurement frequency band:

Adjacent cell measurement is performed through a radio frequency channel corresponding to the measurement frequency band.
The method according to claim 1 or 2, before determining the plurality of candidate frequency bands, further comprising:

Receiving indication information of the absolute wireless frequency point number ARFCN of the frequency point and the subcarrier interval SCS sent by the serving base station of the user equipment, where the ARFCN and the SCS are used to determine the multiple candidate frequency bands.
The method according to claim 1 or 2, before determining the plurality of candidate frequency bands, further comprising:

Receiving a candidate frequency band list sent by a serving base station of the user equipment, where the candidate frequency band list is used to indicate the multiple candidate frequency bands.
The method according to any one of claims 1 to 4, wherein the user equipment stores performance of a radio frequency channel corresponding to each candidate frequency band of the plurality of candidate frequency bands.
The method according to any one of claims 1 to 5, wherein the plurality of candidate frequency bands are candidate frequency bands supported by a hardware capability of the user equipment.
The method according to any one of claims 1 to 6, after selecting the measurement frequency band, further comprising:

Reporting the plurality of candidate frequency bands to a serving base station of the user equipment.
The method according to any one of claims 1 to 7, after selecting the measurement frequency band, further comprising:

Report the priority ranking of the performance of the radio frequency channels corresponding to the multiple candidate frequency bands to the serving base station of the user equipment.
The method according to any one of claims 1 to 8, wherein the performance of the radio frequency channel includes a noise figure of the radio frequency channel.
The method according to any one of claims 1 to 9, wherein the performance of the radio frequency channel comprises an IQ channel imbalance index of the radio frequency channel.
A frequency band selection device, comprising:

A determining module, configured to determine a plurality of candidate frequency bands corresponding to frequency points used by the user equipment for neighboring cell measurement, and each candidate frequency band in the plurality of candidate frequency bands covers the frequency point;

A selection module is configured to select a measurement frequency band when the user equipment performs neighboring cell measurement according to the performance of a radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands.
The apparatus according to claim 11, further comprising:

A measurement module is configured to perform, after the selection module selects the measurement frequency band, perform neighboring cell measurement through a radio frequency channel corresponding to the measurement frequency band selected by the selection module.
The device according to claim 11 or 12, further comprising:

A first receiving module, configured to receive, before the determining module determines the multiple candidate frequency bands, the absolute wireless frequency point number ARFCN of the frequency point and indication information of a subcarrier interval SCS sent by a serving base station of the user equipment , The ARFCN and the SCS are used by the determining module to determine the plurality of candidate frequency bands.
The device according to claim 11 or 12, further comprising:

A second receiving module is configured to receive a candidate frequency band list sent by a serving base station of the user equipment before the determining module determines the multiple candidate frequency bands, where the candidate frequency band list is used to indicate the multiple candidate frequency bands.
The apparatus according to any one of claims 11 to 14, wherein the user equipment stores performance of a radio frequency channel corresponding to each candidate frequency band of the plurality of candidate frequency bands.
The apparatus according to any one of claims 11 to 15, wherein the plurality of candidate frequency bands are candidate frequency bands supported by a hardware capability of the user equipment.
The device according to any one of claims 11 to 16, further comprising:

A first sending module is configured to report the plurality of candidate frequency bands to a serving base station of the user equipment after the selection module selects the measurement frequency band.
The device according to any one of claims 11 to 17, further comprising:

A second sending module is configured to report, after the selection module selects the measurement frequency band, a prioritization of performance of radio frequency channels corresponding to the multiple candidate frequency bands to a serving base station of the user equipment.
The device according to any one of claims 11 to 18, wherein the performance of the radio frequency channel includes a noise figure of the radio frequency channel.
The device according to any one of claims 11 to 19, wherein the performance of the radio frequency channel comprises an IQ channel imbalance index of the radio frequency channel.
A frequency band selection device, comprising a processor, which is coupled to a memory and reads instructions in the memory, and is configured to execute the method according to any one of claims 1 to 10.
The apparatus according to claim 21, wherein the apparatus is a user equipment, a central processing unit chip, a baseband chip, or a baseband processor chip.
A computer storage medium, characterized in that a program is stored on the computer storage medium, and when the program is executed by a processor, it is used to implement the method according to any one of claims 1 to 10.