CN111543075B

CN111543075B - Frequency band selection method and device

Info

Publication number: CN111543075B
Application number: CN201880080874.9A
Authority: CN
Inventors: 邓猛; 沈秀勇; 张茜; 徐国琴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2021-11-30
Anticipated expiration: 2038-06-26
Also published as: CN111543075A; WO2020000217A1

Abstract

A frequency band selection method and a device thereof provide a scheme for selecting a proper frequency band from a plurality of frequency bands when a frequency point for carrying out neighbor cell measurement is covered by the plurality of frequency bands, so as to carry out neighbor cell measurement through a radio frequency channel corresponding to the frequency band. The method comprises the following steps: determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement by user equipment, wherein each candidate frequency band in the plurality of candidate frequency bands covers the frequency point; and selecting a measurement frequency band when the user equipment performs neighbor cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands.

Description

Frequency band selection method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a frequency band selection method and apparatus.

Background

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

According to the frequency band division rule, the frequency point for performing the neighbor cell measurement may be covered by a plurality of frequency bands, so how to select a suitable frequency band from the plurality of frequency bands by the user equipment to perform the neighbor cell measurement through the radio frequency channel corresponding to the frequency band is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a frequency band selection method and a frequency band selection device, and provides a scheme for selecting a proper frequency band from a plurality of frequency bands when a frequency point for performing neighbor cell measurement is covered by the plurality of frequency bands, so that the neighbor cell measurement is performed through a radio frequency channel corresponding to the frequency band.

In a first aspect, an embodiment of the present application provides a frequency band selection method, including the following steps: determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement by user equipment, wherein each candidate frequency band in the plurality of candidate frequency bands covers the frequency point; and selecting a measurement frequency band when the user equipment performs neighbor cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands.

The frequency point for measuring the neighboring cell can be understood as a central frequency point of a signal to be measured of a certain neighboring cell of the current serving cell, and performance evaluation can be performed on the neighboring cell by measuring a reference signal on the frequency point. In addition, in the embodiment of the present application, no specific limitation is made on the function of the frequency point, for example, the frequency point may be applied to a neighboring cell measurement process, and may also be used in measurement processes such as cell search, cell initial measurement, interference measurement, and the like.

By using the frequency band selection method provided in the first aspect, a measurement frequency band for performing neighbor cell measurement is selected from a plurality of candidate frequency bands covering the frequency point for performing neighbor cell measurement by the user according to the performance of the radio frequency channel corresponding to the plurality of candidate frequency bands. By adopting the scheme, the method for selecting the measurement frequency band can be provided when a plurality of candidate frequency bands cover the frequency point, and the phenomenon that the measurement frequency band cannot be selected by the user equipment is avoided. In addition, the scheme can be adopted to screen out a measurement frequency band with better performance. And the neighbor cell measurement is carried out based on the measurement frequency band, so that a more ideal measurement result can be obtained.

In the method provided in the first aspect, the manner of determining the plurality of candidate frequency bands is not unique. Three of which are described below.

In a first mode

Before determining the multiple candidate frequency bands, the indication information of the absolute wireless frequency point number ARFCN and the subcarrier spacing SCS of the frequency point, which is sent by the serving base station of the user equipment, may be received. A plurality of candidate frequency bands may be determined based on the ARFCN and SCS.

And determining a plurality of candidate frequency bands by adopting the first mode as all frequency bands covering the frequency point. By adopting the scheme, a plurality of candidate frequency bands which can be used for carrying out neighbor cell measurement can be determined according to the neighbor cell measurement configuration parameters configured by the service base station.

Mode two

Before determining the 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 the multiple candidate frequency bands. And the frequency bands indicated by the candidate frequency band list sent by the service base station are all frequency bands supported by the service base station.

The candidate frequency bands determined by the second method are the candidate frequency bands which cover the frequency point and are supported by the base station, that is, the candidate frequency bands determined by the second method may not cover all the frequency bands of the frequency point. By adopting the scheme, a plurality of candidate frequency bands which can be used for carrying out neighbor cell measurement can be determined according to the neighbor cell measurement configuration parameters configured by the service base station.

Mode III

After determining the candidate frequency bands in the first or second manner, the frequency bands may be further screened to screen out candidate frequency bands supported by the hardware capability of the user equipment, which are used as the "multiple candidate frequency bands" in the method provided in the first aspect. That is, the candidate bands are supported by the hardware capability of the ue.

By adopting the scheme, the determined multiple candidate frequency bands are frequency bands supported by the hardware capability of the user equipment, so that the measurement frequency band selected from the multiple candidate frequency bands is certainly the frequency band supported by the hardware capability of the user equipment. Therefore, by adopting the above scheme, the finally selected measurement frequency band can be supported by the user equipment and can be used for performing neighbor cell measurement.

In one possible design, the performance of the radio frequency channel includes a noise figure of the radio frequency channel.

In one possible design, the performance of the rf channel includes an IQ channel imbalance indicator of the rf channel.

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

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

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

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

In specific implementation, the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands may be stored in the user equipment. 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 may be selected as the selected measurement frequency band according to the pre-stored measurement result of the performance 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 coefficient 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, the determined multiple candidate frequency bands can be reported to a serving base station of the user equipment.

The user equipment reports the candidate frequency bands to the service base station, so that the service base station can configure the neighbor cell measurement configuration parameters by referring to the candidate frequency bands reported by the user equipment when the service base station subsequently reconfigures the user equipment for neighbor cell measurement. For example, the candidate frequency bands reported by the user equipment are the candidate frequency bands determined by the foregoing manner three (i.e., the frequency bands supported by the user equipment). Then, when the serving base station reconfigures the neighboring cell measurement configuration parameters, the serving base station may instruct the user equipment to perform the neighboring cell measurement on a certain frequency band of the reported candidate frequency bands, so as to avoid the phenomenon that the user equipment is not supported.

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

By adopting the scheme, after the user equipment reports the measurement frequency band, the service base station can indicate the frequency band of the target cell as the measurement frequency band when the service base station subsequently informs the user equipment to carry out cell switching; after the user equipment reports the priority ranking of the performance of the radio frequency channels corresponding to the multiple candidate frequency bands, the serving base station can indicate that the frequency band of the target cell is the candidate frequency band with the highest priority ranking when the serving base station subsequently informs the user equipment of cell switching. In addition, the serving base station may preferentially configure the candidate frequency bands with higher priority order when configuring the neighboring cell measurement configuration parameters for the user equipment in the following based on the reported priority order of the performances of the radio frequency channels corresponding to the multiple candidate frequency bands.

Before the frequency band selection method provided in the first aspect is executed to select the measurement frequency band, the user equipment may compare the ARFCN and SCS of the frequency points used for performing neighbor cell measurement with the ARFCN and SCS of the measurement frequency points of the current serving cell, and if the ARFCN and SCS of the two frequency points are the same, may perform neighbor cell measurement using the frequency band of the current serving cell as the measurement frequency band. If the ARFCN and SCS of the two frequency points are not completely consistent, the method provided in the first aspect may be executed to select the measurement frequency band and perform the neighbor measurement.

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

In a second aspect, an embodiment of the present application further provides another frequency band selection method, where the method includes the following steps: determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement by user equipment, wherein each candidate frequency band in the plurality of candidate frequency bands covers the frequency point; and determining a measurement frequency band for the user equipment to perform neighbor cell measurement according to the frequency range corresponding to each candidate frequency band in the plurality of candidate frequency bands. The selected measurement frequency band may be a minimum candidate frequency band of a frequency range among the plurality of candidate frequency bands.

In a specific implementation, the frequency range corresponding to each candidate frequency band may be calculated according to the related information (e.g., the start frequency and the upper limit frequency, the start ARFCN, and the upper limit ARFCN) of the frequency band recorded in the NV file of the user equipment, for example, the frequency range of a certain frequency band may be a difference between the upper limit frequency and the start frequency of the frequency band, or may be a difference between a frequency corresponding to the upper limit ARFCN of the frequency band and a frequency corresponding to the start ARFCN.

After the measurement frequency band for performing the neighbor cell measurement is selected, the subsequent execution operation is similar to the method provided in the first aspect, and details are not repeated here.

By adopting the scheme, the bandwidth of the filter in the radio frequency channel corresponding to the measuring frequency band can be set to be smaller, so that the interference of out-of-band interference on the transmission signal in the radio frequency channel is reduced.

In a third aspect, an embodiment of the present application provides a frequency band selection apparatus, which includes a determining module and a selecting module. The device comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement of user equipment, and each candidate frequency band in the candidate frequency bands covers the frequency point; and the selection module is used for selecting the measurement frequency band when the user equipment performs the neighbor cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands.

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

In a possible design, the apparatus further includes a first receiving module, configured to receive, before the determining module determines the multiple candidate frequency bands, indication information of an absolute radio frequency point number ARFCN and a subcarrier spacing SCS of a frequency point sent by a serving base station of the user equipment, where the ARFCN and the SCS are used for the determining module to determine the 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 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 second receiving module and the first receiving module may be the same module or two independent modules.

In one possible design, the user equipment stores therein the performance of the radio frequency channel corresponding to each of the plurality of candidate frequency bands.

In one possible design, the plurality of candidate bands are candidate bands supported by hardware capability of the user equipment.

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

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

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

In a fourth aspect, an embodiment of the present application provides a frequency band selection apparatus, which includes a processor, coupled to a memory, and configured to read an instruction in the memory, so as to execute the method according to the first aspect or any one of the first aspect to the second aspect.

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

In a fifth aspect, this embodiment of the present application further provides a computer readable storage medium for storing computer software instructions for executing the functions of any one of the first to second aspects or any one of the first to second aspects, which contains a program designed for executing any one of the first to second aspects or any one of the first to second aspects.

In a sixth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect described above or any one of the first to second aspects described above.

In addition, the technical effects brought by any one of the possible design manners in the second aspect to the sixth aspect can be referred to the technical effects brought by the different design manners in the first aspect, and are not described herein again.

Drawings

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

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

fig. 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 performing cell handover or cell reselection, the user equipment needs to perform neighbor cell measurement, so as to perform performance evaluation on a neighbor cell of a current serving cell, so as to select a neighbor cell with better performance. Before the neighbor cell measurement, the serving base station may issue neighbor cell measurement configuration parameters to the user equipment. The user equipment can determine a frequency point for performing neighbor cell measurement and a frequency band covering the frequency point according to the neighbor cell measurement configuration parameters, and for each frequency band, a radio frequency channel corresponding to the frequency point exists, so that the user equipment can perform neighbor cell measurement through the radio frequency channel corresponding to the selected frequency band, namely, the user equipment receives a reference signal on the frequency point through the radio frequency channel corresponding to the selected frequency band, and completes the neighbor cell measurement process through measuring the reference signal.

As is known, in order to make reasonable use of spectrum resources, the spectrum resources of a communication system are generally divided into a plurality of 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 2570MHz to 2620MHz, and the frequency range of band 41 is 2496MHz to 2690 MHz; in the New Radio (NR) system, the band n38 frequency range is 2570MHz to 2620MHz, and the band n41 frequency range is 2496MHz to 2690 MHz. In addition, according to the frequency division rule, for a 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 the band 38 and the band 41.

Based on the introduction of the frequency bands and the frequency points, it is easy to see that the frequency points used for measuring the neighboring cells may be covered by a plurality of frequency bands. Then, the user equipment may have a plurality of frequency bands covering the frequency point, which are determined according to the neighboring cell measurement configuration parameters issued by the serving base station (that is, the frequency points for performing the neighboring cell measurement are covered by a plurality of frequency bands). In this case, how to select an appropriate frequency band from a plurality of frequency bands covering the frequency point by the user equipment, so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band is a problem to be solved urgently.

Specifically, the neighbor cell measurement configuration parameter sent by the serving base station may include an Absolute Radio Frequency Channel Number (ARFCN), where the ARFCN may be used to indicate the frequency point number of the frequency point used for performing neighbor cell measurement, and the user equipment may determine the frequency point used for performing neighbor cell measurement after receiving the ARFCN. In the LTE system, the ARFCN may be an evolved UMTS terrestrial radio access network absolute frequency channel number (EARFCN); in the NR system, the ARFCN may be a new radio-absolute frequency channel number (NR-ARFCN).

According to the numbering rule of the EARFCNs in the LTE protocol (3GPP TS 36.101), the frequency band corresponding to one 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 EARFCNs on different frequency bands, so that the user equipment can determine the unique frequency band according to the EARFCN delivered by the serving base station even if the frequency point for performing neighbor measurement is covered by multiple frequency bands. For example, in the LTE system, the band 38 has a frequency range of 2570MHz to 2620MHz, and the band 41 has a frequency range of 2496MHz to 2690 MHz. The two frequency bands are overlapped in the frequency range of 2570MHz to 2620 MHz. Taking the frequency point of 2570MHz as an example, on the band 38, EARFCN corresponding to the frequency point is 37750; on band 41, EARFCN corresponding to this frequency point is 40390.

According to the numbering rule (3GPP TS 38.101) of NR-ARFCN in the NR protocol, the NR-ARFCN represents an absolute frequency point, one NR-ARFCN can correspond to a plurality of frequency band numbers, namely when the same frequency point is covered by a plurality of frequency bands, the same frequency point is marked by the same NR-ARFCN on different frequency bands, so that the numbers of the plurality of frequency bands can be determined according to the NR-ARFCN, and the unique frequency band number cannot be determined. For example, in the NR system, the band n38 has a frequency range of 2570MHz to 2620MHz, and the band n41 has a frequency range of 2496MHz to 2690 MHz. The two frequency bands are overlapped in the frequency range of 2570MHz to 2620 MHz. Taking the frequency point of 2620MHz as an example, on band n38, the NR-ARFCN corresponding to the frequency point is 524000; on band n41, the NR-ARFCN corresponding to this frequency point is also 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 all frequency bands supported by the serving base station and covering the frequency point for performing the neighboring cell measurement. That is, the candidate bands included in the candidate band list are not only the bands covering the frequency point, but also the bands supported by the serving base station. For example, in a Long Term Evolution (LTE) system, the candidate band list may be a multibandlnfolist; in a New Radio (NR) system, the candidate band list may be a multifequency bandlist NR.

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

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

Based on the above description, it is easy to see that, when a frequency point for performing neighbor cell measurement is covered by multiple frequency bands, it is difficult for a user equipment to determine a unique frequency band according to a neighbor cell measurement configuration parameter issued by a serving base station, so as to perform neighbor cell measurement through a radio frequency channel corresponding to the unique frequency band. Two situations in which it is difficult for the user equipment to determine the unique frequency band are listed below.

Situation one

In the LTE system, the user equipment may determine a unique frequency band number, i.e., a unique frequency band, according to the EARFCN. However, the frequency band determined by the user equipment according to the EARFCN may not be the frequency band supported by the user equipment, and at this time, if the user equipment is in an idle state, how to select one frequency band from all frequency bands indicated by the multiband bandinfolist and covering the frequency points used for performing the neighbor cell measurement needs to be considered, so as to perform the neighbor cell measurement through the radio frequency channel corresponding to the frequency band.

Situation two

In the NR system, the user equipment may determine, according to the NR-EARFCN, a plurality of frequency bands covering the frequency point for performing the neighbor measurement. At this time, if the ue is in an idle state, how the ue selects one frequency band from all frequency bands covering the frequency point indicated by the multifequency bandlist nr needs to be considered, so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band; if the user equipment is in a connected state, how the user equipment combines with other neighbor cell measurement configuration parameters to acquire all frequency bands covering the frequency point needs to be considered, and then one frequency band is selected from the frequency bands so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band.

It should be noted that the above two cases are only examples. In practical implementation, under various conditions such as various communication systems and different states of the user equipment, the user equipment selects a suitable frequency band from a plurality of candidate frequency bands, so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band. For these situations, the solutions provided in the embodiments of the present application are applicable.

Based on the above problems, embodiments of the present application provide a frequency band selection method and apparatus, which provide a scheme for selecting an appropriate frequency band from multiple frequency bands when a frequency point for performing neighbor cell measurement is covered by the multiple frequency bands, so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band.

Next, an application scenario of the embodiment of the present application will be described first.

The frequency band selection scheme provided by the embodiment of the application can be applied to user equipment. Where a user device may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. The names of the user devices may not be the same in different systems. For example, the user equipment may also be referred to as terminal equipment.

Specifically, the frequency band selection scheme provided by the embodiment of the present application may be applied to a baseband chip, as shown in fig. 1, where the baseband chip is connected to a radio frequency chip, and the radio frequency chip is connected to an antenna. The baseband chip can select a proper measurement frequency band from a plurality of candidate frequency bands by adopting the frequency band selection scheme provided by the embodiment of the application, so that the adjacent region measurement is carried out through a radio frequency channel corresponding to the measurement frequency band in the radio frequency chip.

In terms of physical structure, the radio frequency channel may include an antenna switch module, a filter, an amplifier, a mixer, an analog-to-digital conversion module/a digital-to-analog conversion module, and the like. Taking the receiving channel as an example, the rf channel for receiving signals in the rf chip can be as shown in fig. 2. According to a signal receiving path, a radio frequency channel for receiving signals sequentially comprises an antenna switch module, a filter, an amplifier, a mixer, a filter, an amplifier and an analog-to-digital conversion module. That is, signals received by the antenna sequentially pass through the antenna switch module, the filter, the amplifier, the mixer, the filter, the amplifier and the analog-to-digital conversion module and then are transmitted to the baseband chip.

It should be noted that fig. 2 only shows two rf channels gated by the antenna switch module for receiving signals, and in practical implementation, the number of the rf channels for receiving signals in the rf chip is not specifically limited in the embodiment of the present application, and may be, for example, one, two, four, and the like. Furthermore, only the radio frequency channels for receiving signals are shown in fig. 2. In practical applications, the rf chip further includes an rf channel for transmitting signals.

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

In addition, the analog-to-digital conversion module shown in fig. 2 may not be included in the rf channel of the rf chip. At this time, the analog-to-digital conversion module may be integrated in the baseband chip. That is, in the downlink communication, the signal output to the baseband chip by the rf chip is an analog signal, and the analog signal is converted into a digital signal by the baseband chip and then is subjected to 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 a specific implementation, there may be a case where some devices are shared by multiple rf channels, for example, two rf channels may share one filter or mixer, which is not specifically limited in this embodiment of the present application. When two devices share a filter or mixer, the signals on the two frequency bands are not transmitted simultaneously.

As mentioned above, for each frequency band, there is one radio frequency channel corresponding to the frequency band in the user equipment. When the rf channel is gated, the rf channel can be used to transmit signals on the frequency band. Here too, the following can be understood: for each frequency band, there is a set of radio frequency channel parameters corresponding to the frequency band in the user equipment. The set of radio frequency channel parameters may be software configuration parameters for certain modules in the radio frequency channel shown in fig. 2. For example, the radio frequency channel parameter may be understood as a gating parameter of the antenna switch module, may also be understood as a power-on parameter or an enabling parameter of a device such as a filter, a mixer, an amplifier, or may be understood as another parameter of a device such as a filter, a mixer, an amplifier, or the like. After configuring the radio frequency channel through the radio frequency channel parameter corresponding to the frequency band, the radio frequency channel can be gated, so as to be used for transmitting signals on the frequency band.

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

For example, the frequency resource of the downlink communication is divided into 5 frequency bands, and there are only 4 real rf channels (such as the rf channels shown in fig. 2) for receiving signals in the user equipment, which are respectively referred to as an rf channel a, an rf channel b, an rf channel c, and an rf pass d. In this case, a real rf channel may be used to transmit signals on one frequency band, and may also be used to transmit signals on two frequency bands. For example, for two of the 5 bands, band1 and band2, the signals on both band1 and band2 can be transmitted through rf channel b. In specific implementation, the video channel b may be configured by different radio frequency channel parameters (for example, a radio frequency channel parameter corresponding to the band1 and a radio frequency channel parameter corresponding to the band 2), so as to implement 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, smaller than or equal to the number of actually existing radio frequency channels in the user equipment in a physical sense. In practical implementation, each physical radio frequency channel may be used to transmit signals in only one frequency band. For example, the frequency resources of downlink communication are divided into 4 frequency bands, which are respectively called band1, band2, band3, and band4, and the corresponding radio frequency channel parameters are parameter a, parameter B, parameter C, and parameter D; there are 4 actual rf channels (e.g., the rf channel shown in fig. 2) in the user equipment for receiving signals, which are respectively referred to as rf channel a, rf channel b, rf channel c, and rf pass d. Then rf channel a may be configured according to parameter a to receive signals on band 1; configuring a radio frequency channel B according to the parameter B to receive a signal on the band 2; configuring a radio frequency channel C according to the parameter C to receive a signal on the band 3; radio channel D is configured according to parameter D to receive signals on band 4.

The embodiment of the application provides a frequency band selection method and a frequency band selection device, which are used for selecting a proper frequency band from a plurality of frequency bands so as to perform neighbor cell measurement through a radio frequency channel corresponding to the frequency band. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

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

In the embodiments of the present application, a plurality means two or more. In addition, it is to be understood that the terms first, second, etc. in the description of the present application are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order.

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

S301: and determining a plurality of candidate frequency bands corresponding to the frequency points used for the neighbor cell measurement by the user equipment.

Each candidate frequency band of the multiple candidate frequency bands covers the frequency point for performing neighbor cell measurement (hereinafter referred to as the frequency point). The frequency point for measuring the neighboring cell can be understood as a central frequency point of a signal to be measured of a certain neighboring cell of the current serving cell, and performance evaluation can be performed on the neighboring cell by measuring a reference signal on the frequency point.

As described above, according to the frequency division rule, the frequency point for performing neighbor cell measurement may be covered by multiple frequency bands. In S301, the candidate frequency bands may be regarded as a plurality of frequency bands covering the frequency point. For example, in the NR system, the frequency point used by the user equipment for performing the neighbor cell measurement is a 2610MHz frequency point, and then, when S301 is executed, the multiple candidate frequency bands corresponding to the frequency points determined to perform the neighbor cell measurement may be band n38 and band n 41.

It should be noted that, due to different conditions such as the communication system, the state of the user equipment, and the screening principle of the candidate frequency bands, the multiple candidate frequency bands determined in S301 may not cover all frequency bands of the frequency point. Several ways of determining the plurality of candidate bands are described below.

In a first mode

Before determining the multiple candidate frequency bands in S301, the ARFCN of the frequency band and the indication information of the SCS, which are transmitted by the serving base station of the user equipment, may be received. A plurality of candidate frequency bands may be determined based on the ARFCN and SCS.

ARFCNs include, but are not limited to, the aforementioned EARFCN and NR-ARFCNs.

For example, in the NR system, if the ue is in a connected state, the ue receives a neighbor measurement configuration parameter sent by the serving base station, such as indication information of NR-ARFCN and SCS, before performing neighbor measurement. The user equipment can determine a plurality of candidate frequency bands covering the frequency point by combining the ARFCN and the SCS indicated by the service base station.

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

That is, the candidate bands determined in the first mode may be all bands covering the frequency point.

By adopting the scheme, a plurality of candidate frequency bands which can be used for carrying out neighbor cell measurement can be determined according to the neighbor cell measurement configuration parameters configured by the service base station.

Mode two

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

The candidate band list includes, but is not limited to, multiband bandlnfolist and multiband frequency bandlist nr. Certainly, with the advancement of the communication standard, the name of the candidate frequency band list may be changed, and in the embodiment 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 a plurality of candidate frequency bands that cover the frequency point and are supported by the serving base station.

For example, in the LTE system, if the ue is in an idle state, the ue receives a neighbor measurement configuration parameter, such as EARFCN and MultiBandInfoList, sent by the serving base station before performing neighbor measurement. According to the foregoing description, the user equipment may determine the unique frequency band according to EARFCN. However, the frequency band determined according to EARFCN is not a frequency band supported by the user equipment, and at this time, the user equipment needs to reselect a frequency band for performing neighbor cell measurement, and specifically, the user equipment may use a candidate frequency band indicated in the MultiBandInfoList, which covers the frequency point and is supported by the serving base station, as the multiple candidate frequency bands determined in S301, and further select a measurement frequency band from the multiple candidate frequency bands.

That is to say, the candidate frequency bands determined in the second manner are the candidate frequency bands that cover the frequency point and are supported by the base station, that is, the candidate frequency bands determined in the second manner may not cover all the frequency bands of the frequency point.

Mode III

After the user equipment determines all candidate frequency bands covering the frequency point according to the ARFCN and the SCS, the user equipment may further screen the candidate frequency bands, and select the candidate frequency bands supported by the user equipment from the candidate frequency bands, and the candidate frequency bands obtained after screening are used as the plurality of candidate frequency bands determined in S301.

The candidate frequency bands supported by the user equipment may be understood as candidate frequency bands supported by the hardware capability of the user equipment. In actual implementation, all frequency bands and related information that can be supported by the user equipment are stored in a non-volatile (NV) file (i.e., a file stored in a non-volatile memory) in the user equipment. The user equipment can determine the frequency bands supported by the user equipment by inquiring the NV file. Then, the frequency bands supported by the self and the frequency bands determined according to the ARFCN and the SCS are intersected, so that the multiple candidate frequency bands in S301 can be determined.

That is to say, the candidate frequency bands determined in the third way are the candidate frequency bands that cover the frequency point and are supported by the user equipment, that is, the candidate frequency bands determined in the third way may not cover all the frequency bands of the frequency point.

Certainly, in some cases, the number of the candidate frequency bands screened by the third screening method is one, and at this time, the screened candidate frequency bands may be directly used as the measurement frequency bands for the user equipment to perform the neighbor measurement without performing S302.

Mode IV

After the user equipment determines the candidate frequency bands which cover the frequency point and are supported by the service base station according to the candidate frequency band list, the user equipment can further screen the candidate frequency bands, so as to screen the candidate frequency bands supported by the user equipment, and the candidate frequency bands obtained after screening are used as a plurality of candidate frequency bands determined in S301.

The candidate frequency bands supported by the user equipment may be understood as candidate frequency bands supported by the hardware capability of the user equipment. In actual implementation, all frequency bands and related information that the user equipment can support are stored in the NV file in the user equipment. The user equipment can determine the frequency bands supported by the user equipment by inquiring the NV file. Then, the frequency bands supported by the user and the frequency bands determined according to the candidate frequency band list are intersected, so that the plurality of candidate frequency bands in S301 can be determined.

That is to say, the candidate frequency bands determined in the fourth manner are candidate frequency bands which cover the frequency point and are supported by both the serving base station and the user equipment, that is, the candidate frequency bands determined in the fourth manner may not cover all frequency bands of the frequency point.

Certainly, in some cases, the number of the candidate frequency bands screened by the fourth screening method may be one, and at this time, the screened candidate frequency bands may be directly used as the measurement frequency bands for the user equipment to perform the neighbor measurement without performing S302.

In combination with the third and fourth modes, it can be seen that after some candidate frequency bands covering the frequency point are determined in any mode, the candidate frequency bands can be further screened, a plurality of candidate frequency bands supported by the user equipment are screened, and the screened candidate frequency bands can be regarded as a plurality of candidate frequency bands determined in S301.

And determining a plurality of candidate frequency bands by adopting a third mode or a fourth mode, wherein the plurality of determined candidate frequency bands are frequency bands supported by the hardware capability of the user equipment, so that the measurement frequency band selected from the plurality of candidate frequency bands is a frequency band supported by the hardware capability of the user equipment. Therefore, by adopting the third or fourth mode, the finally selected measurement frequency band can be supported by the user equipment and can be used for performing neighbor cell measurement.

Particularly, the multiple candidate frequency bands determined by the fourth method are frequency bands supported by both the base station and the user equipment, and the measurement frequency band selected from the candidate frequency bands is also a frequency band supported by both the base station and the user equipment.

S302: and selecting a measurement frequency band when the user equipment performs neighbor cell measurement according to the performance of the radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands.

In a specific implementation, the user equipment may measure, in advance, performance of the radio frequency channel corresponding to each candidate frequency band of the multiple candidate frequency bands, and store a measurement result in the user equipment (for example, in an NV file of the user equipment). When the adjacent cell measurement is carried out subsequently, a plurality of candidate frequency bands can be screened based on the pre-measurement result.

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 the storage space, the frequency bands may be sorted according to the measurement result of the performance of the radio frequency channel corresponding to each candidate frequency band. When the related information of each frequency band is stored in the NV file, the related information of the frequency bands can be sequentially stored according to the sequencing order of the measurement results, wherein the measurement result is better before and the measurement result is worse after. 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 frequency band information stored at the top can be selected as the selected measurement frequency band.

The performance of the radio frequency channel corresponding to the candidate frequency band may be understood as follows: as mentioned above, for each candidate frequency band, a set of radio frequency channel parameters corresponding to the candidate frequency band may be determined. Then, after configuring the rf channel according to the set of rf channel parameters, the performance of the rf channel for transmitting signals may be regarded as the performance of the rf channel corresponding to the candidate frequency band.

For example, the radio frequency channel parameter corresponding to the band1 is a parameter a, and after the radio frequency channel a is configured according to the parameter a, the noise coefficient of the radio frequency channel a during signal transmission can be regarded as the performance of the radio frequency channel corresponding to the band 1; for another example, the radio frequency channel parameter corresponding to the band2 is a parameter B, and 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 the band 2; for another example, the radio frequency channel parameter corresponding to the band3 is a parameter C, and after the radio frequency channel C is configured according to the parameter C, the IQ channel imbalance indicator of the radio frequency channel C during signal transmission can be regarded as the performance of the radio frequency channel corresponding to the band 3.

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

In specific implementation, when the measurement frequency band is selected according to the performance of the radio frequency channel corresponding to each candidate frequency band in S302, the candidate frequency band corresponding to the radio frequency channel with the best performance may be selected as the measurement frequency band selected in S302 according to the pre-stored measurement result of the performance 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 coefficient is selected as the measurement frequency band selected in S302, or the candidate frequency band corresponding to the radio frequency channel with the lowest IQ channel imbalance index is selected as the measurement frequency band selected in S302.

In addition, if the performance of the radio frequency channels corresponding to the multiple candidate frequency bands is better, the radio frequency channels can be further screened by combining other conditions. For example, one of several candidate bands with better performance may be selected as the measurement band selected in S302; or, in several candidate frequency bands with better performance, if a certain candidate frequency band is the same as the measurement frequency band corresponding to the measurement frequency point of the current serving cell, the candidate frequency band may be selected as the measurement frequency band selected in S302; the latter further screens the candidate frequency bands according to the hardware capability of the user equipment, and selects a candidate frequency band supported by the user equipment as the measurement frequency band selected in S302.

After S302 is executed, the neighboring cell measurement may be performed through the radio frequency channel corresponding to the measurement frequency band selected in S302. Namely, configuring a radio frequency channel according to the radio frequency channel parameter corresponding to the measurement frequency band, and starting the corresponding radio frequency channel to receive the reference signal on the frequency point, thereby evaluating the performance of the adjacent cell corresponding to the frequency point according to the measurement result of the reference signal.

By adopting the scheme, the neighbor cell measurement can be realized based on the measurement frequency band selected by the frequency band selection scheme shown in fig. 2, so that reference is provided for the user equipment to perform cell switching or cell reselection and other operations.

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

The user equipment reports the candidate frequency bands to the service base station, so that the service base station can configure the neighbor cell measurement configuration parameters by referring to the candidate frequency bands reported by the user equipment when the service base station subsequently reconfigures the user equipment for neighbor cell measurement. For example, the candidate frequency bands reported by the user equipment are frequency bands determined by the aforementioned third method (i.e., frequency bands supported by the user equipment). Then, when the serving base station reconfigures the neighboring cell measurement configuration parameters, the serving base station may instruct the user equipment to perform the neighboring cell measurement on a certain frequency band of the reported candidate frequency bands, so as to avoid the phenomenon that the user equipment is not supported.

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 priority ranking of the performance of the radio frequency channels corresponding to the multiple candidate frequency bands may be reported.

By adopting the scheme, after the user equipment reports the measurement frequency band, the service base station can indicate the frequency band of the target cell as the measurement frequency band when the service base station subsequently informs the user equipment to carry out cell switching; after the user equipment reports the priority ranking of the performance of the radio frequency channels corresponding to the multiple candidate frequency bands, the serving base station can indicate that the frequency band of the target cell is the candidate frequency band with the highest priority ranking when the serving base station subsequently informs the user equipment of cell switching.

In addition, the serving base station may preferentially configure the candidate frequency bands with higher priority order when configuring the neighboring cell measurement configuration parameters for the user equipment in the following based on the reported priority order of the performances of the radio frequency channels corresponding to the multiple candidate frequency bands.

In the embodiment of the present application, it is a more important part to select the measurement frequency band according to the performance of the radio frequency channel corresponding to each candidate frequency band. Next, how to select a measurement frequency band for performing neighbor cell measurement by the user equipment according to the performance of the radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands in S302 is described by using several specific examples.

Example 1

Taking the performance of the radio frequency channel corresponding to the candidate frequency band as an example of the noise coefficient, testing the noise coefficient (unit dB) of the radio frequency channel corresponding to each candidate frequency band that the user equipment can support in a laboratory in advance, and then storing each candidate frequency band and the corresponding noise coefficient in an NV file of the user equipment, where the data format may be: [ candidate frequency band number, noise coefficient ],. The user equipment can read data in the NV file in a working state, so that the noise coefficient corresponding to each candidate frequency band can be obtained, and then the candidate frequency band with the minimum noise coefficient can be selected as a measuring frequency band.

Example two

Taking the performance of the radio frequency channel corresponding to the candidate frequency band as an example of the noise coefficient, testing the noise coefficient of the radio frequency channel corresponding to each candidate frequency band which can be supported by the user equipment in a laboratory in advance, and defining a priority for each candidate frequency band according to the size of the noise coefficient: the candidate frequency band with the minimum noise coefficient has the priority of 0, and the priorities of the candidate frequency bands are 1, 2 and3 in sequence according to the increasing sequence of the noise coefficients. Then, each candidate frequency band and the corresponding priority are stored in an NV file of the user equipment, and the data format may be: [ candidate frequency band number, priority ],. The user equipment can read the data in the NV file in the working state, so that the corresponding priority of each candidate frequency band can be obtained, and then the candidate frequency band with the minimum priority can be selected as the measuring frequency band.

Example three

Taking the performance of the radio frequency channel corresponding to the candidate frequency band as an example of the noise coefficient, testing the noise coefficient of the radio frequency channel corresponding to each candidate frequency band that the user equipment can support in a laboratory in advance, sorting all the candidate frequency bands according to the size of the noise coefficient, and arranging the candidate frequency band with the minimum noise coefficient at the forefront in sequence, such as: 3,1,4, 27,....... Wherein the number represents the candidate frequency band number. Then, the candidate frequency bands that can be supported by the user equipment are stored in the NV file of the user equipment in this order, and the data format may be: [ candidate frequency band number ],. The user equipment can read data in the NV file in a working state, select the candidate frequency band which is arranged at the forefront and has the smallest noise coefficient, and take the frequency band as a measurement frequency band.

Example four

In example four, the performance of the radio frequency channel corresponding to the candidate frequency band is the comprehensive performance including the noise coefficient, the IQ channel imbalance index, and the phase noise. And sequencing the candidate frequency bands according to the comprehensive performances of the noise coefficient, the IQ channel imbalance index, the phase noise and the like of the radio frequency channel corresponding to each candidate frequency band, sequencing the candidate frequency bands according to the performance coefficients (the noise coefficient, the IQ channel imbalance index and the phase noise) from small to large according to a sequencing rule, and then selecting the candidate frequency band with the minimum performance coefficient as the measurement frequency band.

The specific implementation method can be as follows: testing the performance coefficients of the radio frequency channels corresponding to each candidate frequency band which can be supported by the user equipment in a laboratory in advance, sequencing the candidate frequency bands according to the performance coefficients from small to large, wherein the candidate frequency band with the minimum performance coefficient is arranged at the front, and sequentially arranging, for example: 3,1,4, 27,....... Wherein the number represents the candidate frequency band number. 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 may be: [ candidate frequency band number ],. The user equipment can read data in the NV file in the working state, select the candidate frequency band which is arranged at the top and has the minimum performance coefficient, and take the frequency band as a measurement frequency band.

Furthermore, in example four, the noise figure, the IQ channel imbalance index, and the phase noise may also be weighted separately when calculating the performance coefficients. The operation flow after weighting is similar to the aforementioned flow, and is not described herein again.

In summary, with the frequency band selection scheme provided in this embodiment of the present application, a measurement frequency band for performing neighbor cell measurement is selected from a plurality of candidate frequency bands covering the frequency point for performing neighbor cell measurement by the user according to the performance of the radio frequency channel corresponding to the plurality of candidate frequency bands. By adopting the scheme, the method for selecting the measurement frequency band can be provided when a plurality of candidate frequency bands cover the frequency point, and the phenomenon that the measurement frequency band cannot be selected by the user equipment is avoided. In addition, the scheme can be adopted to screen out a measurement frequency band with better performance. And the neighbor cell measurement is carried out based on the measurement frequency band, so that a more ideal measurement result can be obtained.

The above is an introduction to the frequency band selection method provided in the embodiment of the present application. It should be noted that before the frequency band selection method shown in fig. 3 is executed to select the measurement frequency band, the user equipment may compare the ARFCN and SCS of the frequency points used for performing neighbor cell measurement with the ARFCN and SCS of the measurement frequency points of the current serving cell, and if the ARFCN and SCS of the two frequency points are the same, the frequency band of the current serving cell may be used as the measurement frequency band to perform neighbor cell measurement. If the ARFCN and SCS of the two frequency points are not completely consistent, the method shown in fig. 3 may be executed to select the measurement frequency band and perform the neighbor cell measurement.

In addition, after the determination of the multiple candidate bands is performed in S301, one candidate band may be randomly selected from the multiple candidate bands as the measurement band. 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 performing neighbor cell measurement.

The embodiment of the present application further provides another frequency band selection method, including the following steps: determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement by user equipment, wherein each candidate frequency band in the plurality of candidate frequency bands covers the frequency point; and determining a measurement frequency band for the user equipment to perform neighbor cell measurement according to the frequency range corresponding to each candidate frequency band in the plurality of candidate frequency bands. The selected measurement frequency band may be a minimum candidate frequency band of a frequency range among the plurality of candidate frequency bands.

After the measurement frequency band for performing the neighbor cell measurement is selected, the subsequent execution operation is similar to the method shown in fig. 3, and details are not repeated here.

By adopting the scheme, the frequency range of the finally selected measuring frequency band for carrying out the neighbor cell measurement is smaller. Then, for the filter in the radio frequency channel corresponding to the measurement frequency band, the bandwidth of the filter may be set to be smaller, so as to reduce the interference of the out-of-band interference to the transmission signal in the radio frequency channel.

Based on the same inventive concept, the embodiment of the present application further provides a frequency band selection apparatus, which can be used to execute the frequency band selection method shown in fig. 3. The apparatus can be regarded as a baseband chip or a baseband processor in the baseband chip in fig. 2, 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, configured to determine multiple candidate frequency bands corresponding to a frequency point used by a user equipment for performing neighbor cell measurement, where each candidate frequency band in the multiple candidate frequency bands covers the frequency point.

A selecting module 402, configured to select, 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 when the user equipment performs neighbor cell measurement.

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

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

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

Optionally, the user equipment stores therein performance of a radio frequency channel corresponding to each of the multiple candidate frequency bands.

Optionally, the plurality of candidate bands are candidate bands supported by hardware capability of the user equipment.

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

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

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

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

It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should also be noted that the frequency band selection apparatus 400 shown in fig. 4 can be used to execute the method provided by the corresponding embodiment of fig. 3, and therefore, the implementation manner and technical effects not described in detail in the frequency band selection apparatus 400 shown in fig. 4 can be referred to the related description in the method shown in fig. 3.

Based on the same inventive concept, the embodiment of the application also provides a frequency band selection device. The frequency band selection apparatus can be used to perform the frequency band selection method shown in fig. 3, and can also be regarded as the same apparatus as the frequency band selection apparatus 400 shown in fig. 4. The apparatus includes a processor coupled to a memory and configured to read instructions from the memory for performing the frequency band selection method shown in fig. 3.

Alternatively, the apparatus may be a user equipment, a central processor chip, a baseband chip, or a baseband processor chip.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method for selecting a frequency band, comprising:

determining a plurality of candidate frequency bands corresponding to a frequency point used for neighbor cell measurement by user equipment, wherein each candidate frequency band in the candidate frequency bands covers the frequency point;

selecting a measurement frequency band when the user equipment performs neighbor cell measurement according to the performance of a radio frequency channel corresponding to each candidate frequency band in the plurality of candidate frequency bands;

after selecting the measurement frequency band, the method further comprises:

and carrying out neighbor cell measurement through the radio frequency channel corresponding to the measurement frequency band.

2. The method of claim 1, prior to determining the plurality of candidate bins, further comprising:

and receiving the absolute wireless frequency point number ARFCN of the frequency point and the indication information of the subcarrier spacing SCS, which are sent by a service base station of the user equipment, wherein the ARFCN and the SCS are used for determining the candidate frequency bands.

3. The method of claim 1, prior to determining the plurality of candidate bins, further comprising:

receiving a candidate frequency band list sent by a serving base station of the user equipment, wherein the candidate frequency band list is used for indicating the candidate frequency bands.

4. The method according to any of claims 1 to 3, wherein the UE stores therein the performance of the RF channel corresponding to each of the candidate bands.

5. The method of any one of claims 1 to 3, wherein the plurality of candidate bands are candidate bands supported by hardware capability of the UE.

6. The method according to any one of claims 1 to 3, further comprising, after selecting the measurement band:

and reporting the candidate frequency bands to a service base station of the user equipment.

7. The method according to any one of claims 1 to 3, further comprising, after selecting the measurement band:

and reporting the performance priority ranking condition of the radio frequency channels corresponding to the candidate frequency bands to a service base station of the user equipment.

8. The method of any of claims 1 to 3, wherein the performance of the radio frequency channel comprises a noise figure of the radio frequency channel.

9. The method of any one of claims 1 to 3, wherein the performance of the radio frequency channel comprises an IQ channel imbalance indicator of the radio frequency channel.

10. A frequency band selection apparatus, comprising:

a determining module, configured to determine multiple candidate frequency bands corresponding to a frequency point used by a user equipment for performing neighbor cell measurement, where each candidate frequency band of the multiple candidate frequency bands covers the frequency point;

a selecting module, configured to select, according to a performance of a radio frequency channel corresponding to each candidate frequency band in the multiple candidate frequency bands, a measurement frequency band when the user equipment performs neighbor cell measurement;

the frequency band selection device further comprises:

and the measurement module is used for performing neighbor cell measurement through the radio frequency channel corresponding to the measurement frequency band selected by the selection module after the selection module selects the measurement frequency band.

11. The apparatus of claim 10, further comprising:

a first receiving module, configured to receive, before the determining module determines the multiple candidate frequency bands, indication information of an absolute radio frequency point number ARFCN and a subcarrier spacing SCS of the frequency point, which are sent by a serving base station of the user equipment, where the ARFCN and the SCS are used by the determining module to determine the multiple candidate frequency bands.

12. The apparatus of claim 10, further comprising:

a second receiving module, configured to receive a candidate frequency band list sent by a serving base station of the user equipment before the determining module determines the candidate frequency bands, where the candidate frequency band list is used to indicate the candidate frequency bands.

13. The apparatus according to any of claims 10 to 12, wherein the user equipment stores therein performance of the radio frequency channel corresponding to each of the candidate frequency bands.

14. The apparatus of any one of claims 10 to 12, wherein the plurality of candidate bands are candidate bands supported by hardware capability of the user equipment.

15. The apparatus of any of claims 10 to 12, further comprising:

a first sending module, configured to report the multiple candidate frequency bands to a serving base station of the user equipment after the selecting module selects the measurement frequency band.

16. The apparatus of any of claims 10 to 12, further comprising:

a second sending module, configured to report, to a serving base station of the user equipment, a performance prioritization condition of the radio frequency channels corresponding to the multiple candidate frequency bands after the selection module selects the measurement frequency band.

17. The apparatus of any of claims 10 to 12, wherein the performance of the radio frequency channel comprises a noise figure of the radio frequency channel.

18. The apparatus of any of claims 10 to 12, wherein the performance of the radio frequency channel comprises an IQ channel imbalance indicator of the radio frequency channel.

19. A frequency band selection apparatus comprising a processor coupled to a memory and configured to read instructions from the memory for performing the method of any one of claims 1 to 9.

20. The apparatus of claim 19, wherein the apparatus is a user equipment, a central processor chip, a baseband chip, or a baseband processor chip.

21. A computer storage medium, characterized in that the computer storage medium has stored thereon a program which, when executed by a processor, is adapted to carry out the method according to any one of claims 1 to 9.