CN111148144A

CN111148144A - RRM (radio resource management) measurement method and device

Info

Publication number: CN111148144A
Application number: CN201811302671.8A
Authority: CN
Inventors: 缪德山; 郑方政
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2020-05-12
Anticipated expiration: 2038-11-02
Also published as: CN111148144B

Abstract

The invention provides a RRM (radio resource management) measurement method and device, which are used for solving the technical problem of high power consumption of UE (user equipment) caused by poor RRM measurement flexibility in the prior art. The method comprises the following steps: in a measurement period, the UE performs RRM measurement on at least one downlink signal in a plurality of time windows to obtain a plurality of RRM measurement values; and the UE combines the plurality of RRM measurement values to form a RRM measurement result of a layer 1.

Description

RRM (radio resource management) measurement method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a RRM measurement method and apparatus.

Background

In current mobile communication systems, a User Equipment (UE) needs to periodically measure downlink signals to keep track of network cells. Radio Resource Management (RRM) measurements are used to support cell handover when the UE is in a Radio Resource Control (RRC) connected (connect) state, and the RRM measurements are used to assist the UE in cell selection or reselection when the UE is in an RRC idle (idle) state.

However, in the prior art, no matter the UE is in the RRC _ connect or RRC _ idle state, when configured in an RRM measurement mode, in each measurement period, the UE performs RRM measurement in a time window of a fixed period based on a single downlink signal, and the measurement mode is not flexible enough, which results in an excessively long RRM measurement time and large power consumption.

Disclosure of Invention

The invention provides a RRM (radio resource management) measurement method and device, which are used for solving the technical problem of high power consumption of UE (user equipment) caused by poor RRM measurement flexibility in the prior art.

In a first aspect, an embodiment of the present invention provides an RRM measurement method, where the method includes:

in a measurement period, the UE performs RRM measurement on at least one downlink signal in a plurality of time windows to obtain a plurality of RRM measurement values; and the UE combines the plurality of RRM measurement values to form a RRM measurement result of a layer 1.

In the embodiment of the present invention, the UE may perform RRM measurement in multiple time windows based on at least one downlink signal in one measurement period, and compared with a method in the prior art that RRM measurement is performed only by using a single downlink signal, the embodiment of the present invention provides more types of downlink signals that can be selected as measurement objects to perform RRM measurement, thereby improving the flexibility of RRM measurement, reducing RRM measurement time of the UE, and saving power consumption of the UE.

Optionally, the downlink signal includes one or more of a dedicated measurement reference signal, a channel state information reference signal CSI-RS, a data signal, a synchronization signal block SSB signal, and a demodulation reference signal DMRS.

The embodiment provides a plurality of realization modes of RRM measurement signal sources, and improves the flexibility of RRM measurement.

Optionally, the performing, by the UE, RRM measurement on at least one downlink signal in multiple time windows includes:

the UE selects to perform RRM measurements multiple times during the active time of one discontinuous reception DRX cycle or to skip one DRX cycle during which RRM measurements are not performed.

The embodiment relaxes the combined filtering of the RRM measurement in the time domain, and can effectively reduce the power consumption caused by frequent awakening of the UE compared with the prior art in which a fixed period time window is adopted for measurement.

after receiving the wake-up signal, the UE determines the subsequent activation state to continuously perform a plurality of RRM measurements.

Optionally, the combining, by the UE, the multiple RRM measurement values includes:

and the UE combines the RRM measured values of the downlink signals in the same beam direction.

The embodiment can ensure the reliability of the combination of the RRM measurement values, thereby improving the accuracy of the RRM measurement.

the UE weights each RRM measured value according to the sending power of the downlink signal corresponding to each RRM measured value in the plurality of RRM measured values;

and performing combination processing on the weighted plurality of RRM measurement values.

Optionally, before performing RRM measurement on at least one downlink signal in multiple time windows, the UE further includes:

and the UE determines whether to reduce the number of RRM measurements in the period or reduce the number of adjacent cells needing RRM measurement in the period or reduce the number of frequencies or carriers needing RRM measurement in the period according to the RRM measurement result of the serving cell obtained in the last measurement period or the RRM measurement result of the serving cell obtained by filtering in a plurality of past measurement periods.

By the embodiment, the RRM measurement times, the number of adjacent cells needing RRM measurement and the number of frequencies or carriers needing RRM measurement in one period of the UE can be flexibly adjusted, so that the RRM measurement flexibility is improved, the invalid measurement is reduced, and the power consumption of the UE is saved.

Optionally, the measurement result of the serving cell includes an RSRP measurement value of the serving cell and/or an RSRQ measurement value of the serving cell.

By the embodiment, the RRM measurement times, the number of neighbor cells needing RRM measurement or the number of frequencies needing RRM measurement in one period of the UE can be flexibly adjusted according to the historical measurement values of the RSRP and/or the RSRQ of the serving cell, so that the flexibility of RRM measurement is further improved, and the power consumption of the UE is saved.

according to the indication of a base station or the convention of a system, when the moving speed of the UE is lower than a preset threshold X or the UE determines to enter a low-power consumption measurement mode, the UE applies a first neighbor cell list or a first pilot frequency measurement set to perform RRM measurement, and when the moving speed of the UE is higher than a preset threshold Y or the UE determines to enter a normal power consumption measurement mode, the UE applies a second neighbor cell list or a second pilot frequency measurement set to perform RRM measurement; the number of neighbor cells in the first neighbor cell list is less than that of neighbor cells in the second neighbor cell list, the number of frequency points in the first pilot frequency measurement set is less than that of frequency points in the second pilot frequency measurement set, and X is less than or equal to Y.

Through the embodiment, the neighbor cell list or the pilot frequency measurement set used by RRM measurement can be flexibly selected according to the mobility of the UE, so that the flexibility of RRM measurement is improved, and the power consumption of the UE is saved.

In a second aspect, an embodiment of the present invention provides an RRM measurement apparatus, where the apparatus includes:

at least one processor, and

a memory communicatively coupled to the at least one processor, a communication interface;

wherein the memory stores instructions executable by the processor, and the processor performs the following method with the communication interface by executing the instructions stored by the memory:

performing RRM measurement on at least one downlink signal in a plurality of time windows in a measurement period to obtain a plurality of RRM measurement values;

and combining the plurality of RRM measurement values to form a RRM measurement result of one layer 1.

Optionally, the downlink signal includes one or more of a dedicated measurement reference signal, a CSI-RS, a data signal, an SSB signal, and a DMRS.

Optionally, the processor is specifically configured to:

selecting to perform a plurality of RRM measurements within the activation time of one Discontinuous Reception (DRX) cycle or skipping one DRX cycle, and not performing the RRM measurements within the DRX cycle.

Optionally, the processor is specifically configured to:

after receiving the wake-up signal, the activation state after the determination continues to make a plurality of RRM measurements.

Optionally, the processor is specifically configured to:

combining RRM measurements of downlink signals in the same beam direction.

Optionally, the processor is specifically configured to:

weighting each RRM measured value according to the transmission power of the downlink signal corresponding to each RRM measured value in the plurality of RRM measured values;

Optionally, the processor is further configured to:

before the RRM measurement is carried out on at least one downlink signal in a plurality of time windows, whether the number of RRM measurement in one period is reduced or the number of adjacent cells needing RRM measurement in one period is reduced or the number of frequencies or carriers needing RRM measurement in one period is reduced is determined according to the RRM measurement result of the serving cell obtained in the last measurement period or the RRM measurement result of the serving cell obtained by filtering in a plurality of past measurement periods.

Optionally, the processor is specifically configured to:

according to the instruction of a base station or the convention of a system, when the moving speed of the device is lower than a preset threshold X or the device determines to enter a measurement mode with low power consumption, a first neighbor cell list or a first pilot frequency measurement set is used for RRM measurement, and when the moving speed of the device is higher than a preset threshold Y or the device determines to enter a measurement mode with normal power consumption, a second neighbor cell list or a second pilot frequency measurement set is used for RRM measurement; the number of neighbor cells in the first neighbor cell list is less than that of neighbor cells in the second neighbor cell list, the number of frequency points in the first pilot frequency measurement set is less than that of frequency points in the second pilot frequency measurement set, and X is less than or equal to Y.

In a third aspect, an embodiment of the present invention provides an RRM measurement apparatus, including:

a measurement unit, configured to perform RRM measurement on at least one downlink signal in multiple time windows in a measurement period, to obtain multiple RRM measurement values;

and the processing unit is used for carrying out combination processing on the plurality of RRM measurement values to form an RRM measurement result of one layer 1.

Optionally, the measurement unit is specifically configured to:

Optionally, the processor is specifically configured to:

combining RRM measurements of downlink signals in the same beam direction.

Optionally, the processing unit is specifically configured to:

Optionally, the measurement unit is further configured to:

Optionally, the measurement unit is specifically configured to:

In a fourth aspect, the embodiments of the present invention provide a computer-readable storage medium, which stores computer instructions that, when executed on a computer, cause the computer to perform the method according to the first aspect of the embodiments or any optional implementation manner of the first aspect of the embodiments of the present invention.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a diagram illustrating RRM measurements in the prior art;

fig. 2 is a flowchart of an RRM measurement method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a possible RRM measurement method according to an embodiment of the present invention;

fig. 4 is a diagram illustrating another possible RRM measurement method according to an embodiment of the present invention;

fig. 5 is a schematic diagram of another possible RRM measurement method according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of an RRM measurement apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another RRM measurement apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the embodiments of the present invention are not intended to limit the technical solutions of the present invention, but may be combined with each other without conflict.

The embodiment of the invention can be applied to a 5G system; the present invention is also applicable to other wireless communication systems, such as Long Term Evolution (LTE) System, Global System for Mobile communication (GSM) System, Mobile communication System (UMTS), Code Division Multiple Access (CDMA) System, and new network equipment System.

The user terminal UE according to the embodiments of the present invention may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. Wireless user terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless User Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User agent (User agent), and a User Device.

A base station according to embodiments of the present invention may be configured to interconvert received air frames and IP packets as a router between a wireless terminal device and a remainder of an access network, where the remainder of the access network may include an Internet Protocol (IP) network device. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a network device in a 5G system, such as a Next generation Base Station (gNB), a Base Transceiver Station (BTS) in a global system for Mobile Communication (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA), or an evolved Node B (eNB) in LTE, which is not limited in the embodiments of the present invention.

It is to be understood that the terms first, second, and the like in the description of the embodiments of the invention are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order. "plurality" in the description of the embodiments of the present invention means two or more.

The term "and/or" in the embodiment of the present invention is only one kind of association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the existing mobile communication system, the period of RRM measurement is specified according to the accuracy and mobility of the measurement, and is static and unchangeable, and the period of measurement report is network configurable. In a RRM measurement report, layer 1 and layer 3 filtering is usually required, that is, a UE completes a single measurement and cannot directly form a measurement report, which is mainly a single measurement is completed in a short time, but a channel fading period is long, and multiple measurements and layer 1 filtering need to be performed within a complete channel fading period to obtain an accurate measurement report; meanwhile, in actual measurement, because the measurement result is inaccurate due to noise, interference and fading, a measurement report needs to be obtained by multiple measurement averages, and at this time, layer 3 filtering is needed to perform final signal averaging.

Currently, there are two main cases for the method for the UE to perform RRM measurement:

the 1 st:

when the UE is in RRC _ connected state, the network may configure a Synchronization Signal Block (SSB) or a channel state information measurement reference signal (CSI-RS) for RRM measurement. The UE may continuously measure Reference Signal Receiving Power (RSRP) or Reference Signal Receiving Quality (RSRQ) of the neighboring cells with the same frequency according to a requirement to obtain the signal Quality of the neighboring cells. If the UE is in the DRX mode, the RRM measurement period and the DRX cycle period have corresponding relation. For the measurement of the inter-frequency cell, the network side may send a corresponding signaling to notify the UE whether to measure the downlink signal of the frequency band different from the current cell. For layer 1 filtering, measurements of 5 RRM samples are typically required to form one layer 1 RRM report. In this scenario, the characteristics of the channel and the mobility characteristics of the user are not considered.

The 2 nd:

when the UE is in RRC idle state, the UE can only rely on the SSB signal for RRM measurements, since the SSB is not present every slot, which results in measurement delay and extension of measurement time. Meanwhile, in the RRCIDLE state, the serving cell always needs to measure, and the measured period is related to the paging (page) period, i.e. related to the DRX period in IDLE mode. When the signal strength of the serving cell is below a certain threshold, neighbor cell measurements are initiated. For inter-frequency cell measurement, corresponding measurement needs to be performed according to a priority list defined by the network. In RAN4 specification, the terminal UE performs RRM measurement at least once every DRX cycle in IDLE mode, and the interval between two RRM measurements must be kept 1/2DRX cycle length, while at least two RRM samples are required to filter the RRM measurement report forming a layer 1.

These requirements in DRX mode have a large impact on the power consumption of the UE, mainly in the following aspects: 1) measuring once per DRX cycle forces the UE to wake up periodically even if no data arrives; 2) if the DRX and SSB positions are not reasonably adapted, the UE needs to wake up for multiple times in one DRX period to complete RRM measurement and data reception; 3) the fixed measurement period and the fixed measurement times make the UE have no flexibility in RRM measurement, and the fixed measurement period and the fixed measurement steps must be maintained even if the moving speed is different; 4) sparse SSB configurations, such that the UE cannot obtain enough measurement samples within a specified time window, causing unnecessary measurement waiting.

For example, fig. 1 illustrates an example of RRM measurements in RRC-IDLE mode, which describes the problem of the location of the SSB and DRX cycle mismatch. When the DRX cycle is long, the UE cannot perform RRM measurement immediately when waking up from the DRX-OFF state, and needs to perform Automatic Gain Control (AGC) adjustment receiver configuration first, but there is an interval between two SSBs, so that at least waking up twice in one RRC measurement, performing AGC adjustment once, performing RRM measurement once, and performing a DRX-ON time window between two measurements, the UE also needs to wake up, and in this case, the UE needs to consume a large power consumption to perform RRM measurement.

Based on the above analysis, in the prior art, no matter the UE is in the RRC _ connect or RRC _ idle state, when configured in an RRM measurement mode, the UE performs RRM measurement in multiple time windows distributed periodically based on a single downlink signal in each measurement period. On one hand, because the measurement object, namely the downlink signal is single, the UE needs to obtain multiple RRM measurement samples within a long time to form a measurement result of layer 1, and the UE consumes a large amount of power; on the other hand, the UE has no flexibility in RRM measurement, and must perform measurement based on a time window with a fixed period, and the UE must wake up periodically to perform RRM measurement even if no data arrives, which causes waste of power consumption; besides, the RRM measurement is also poorly adapted, for example, when moving at low speed, the number of RRM measurements of the UE, the measurement cell or the measurement frequency band, etc. are configured and there is no change in medium and high speed mobility, and generally, if the UE is in a fixed geographical location for a long time, measuring too many neighboring cells is an inefficient power-wasting action. Therefore, the prior art has the technical problem that RRM measurement flexibility is poor, so that power consumption of the UE is high.

In order to solve the above technical problems in the prior art, embodiments of the present invention provide an RRM measurement and apparatus. Referring to fig. 2, the RRM measurement method includes:

s101: in a measurement period, the UE performs RRM measurement on at least one downlink signal in a plurality of time windows to obtain a plurality of RRM measurement values;

the downlink signal may be specifically one or more of a dedicated measurement reference signal, CSI-RS, a data signal (DataSignal), an SSB signal, and a demodulation reference signal (DMRS). Of course, in the specific implementation process, other types of signals may be selected as the measurement signal source according to actual requirements, and the embodiment of the present invention is not limited specifically.

S102: and the UE combines the plurality of RRM measurement values to form a RRM measurement result of a layer 1.

In the embodiment of the present invention, the UE may perform RRM measurement in multiple time windows based on at least one downlink signal in one measurement period, and compared with a method in the prior art that RRM measurement is performed only by using a single downlink signal, the embodiment of the present invention provides more types of downlink signals that can be selected as measurement objects, thereby improving RRM measurement flexibility, and reducing RRM measurement time of the UE, so as to save UE power consumption, and solve the technical problem in the prior art that RRM measurement flexibility is poor, which causes UE power consumption to be large.

In one possible embodiment, the RRM measurement performed by the UE on the at least one downlink signal may be performed in a plurality of aperiodic time windows, that is, the RRM measurement may be performed by the UE in two or more time windows spaced by any time period. Specific implementations include, but are not limited to, the following two:

the first method comprises the following steps: the UE selects to perform RRM measurement once or continuously for a plurality of times in the activation time of one Discontinuous Reception (DRX) cycle or skips one or a plurality of continuous DRX cycles, and does not perform RRM measurement in the DRX cycle; and the second method comprises the following steps: after receiving the wake-up signal, the UE determines that the subsequent active state continuously performs RRM measurement once or continuously for multiple times, and does not perform RRM measurement in the inactive state where the wake-up signal is not received.

When the UE performs multiple continuous RRM measurements, the measurement signal source may be a dedicated measurement reference signal configured by the network, or a mixed RRM measurement signal source is used, for example, a combination of at least two measurement signal sources of the dedicated measurement reference signal, CSI-RS, data signal, SSB signal, and DMRS is used, which is not limited in the embodiment of the present invention.

The embodiment relaxes the combined filtering of RRM measurement in the time domain, and effectively reduces the power consumption caused by frequent awakening of the UE on the premise of ensuring the RRM measurement performance compared with the prior art which adopts SSB signals with fixed periods for measurement.

In order to further reduce the invalid measurements and save the power consumption of the UE, in a possible embodiment, before performing RRM measurements on at least one downlink signal in multiple time windows, the UE may further determine whether to reduce the number of RRM measurements in the one period, or reduce the number of neighbor cells requiring RRM measurements in the one period, or reduce the number of frequencies or carriers requiring RRM measurements in the one period, according to an RRM measurement result of the serving cell obtained in a previous measurement period or an RRM measurement result of the serving cell filtered in multiple past measurement periods.

For example, it is determined whether an RRM measurement result of the serving cell obtained in the previous measurement period is smaller than a first preset threshold, and if so, the number of RRM measurements in the one period is reduced, or the number of neighbor cells requiring the RRM measurement in the one period is reduced, or the number of frequencies or carriers requiring the RRM measurement in the one period is reduced.

For another example, comparing the RRM measurement result of the previous measurement period with the RRM measurement result of another measurement period before the previous measurement period, determining whether a change value of the RRM measurement results of the two times is smaller than a second preset threshold, and if so, reducing the number of RRM measurements in the one period, or reducing the number of neighboring cells requiring the RRM measurement in the one period, or reducing the number of frequencies or carriers requiring the RRM measurement in the one period.

For another example, the RRM measurement result in the previous measurement cycle is compared with the maximum measurement result in the RRM measurement results in a plurality of measurement cycles before the previous measurement cycle, and whether a change value of the RRM measurement result in the previous measurement cycle from the maximum measurement result is smaller than a third preset threshold is determined, if so, the number of RRM measurements in the one cycle is reduced, or the number of neighboring cells requiring the RRM measurement in the one cycle is reduced, or the number of frequencies or carriers requiring the RRM measurement in the one cycle is reduced.

In a specific implementation procedure, the measurement result of the serving cell may include an RSRP measurement value of the serving cell and/or an RSRQ measurement value of the serving cell.

Through the embodiment, the number of RRM measurement times in one period of the UE can be adjusted according to the historical measurement result, or the number of adjacent cells needing RRM measurement in the one period is reduced, or the number of frequencies needing RRM measurement in the one period is reduced, so that the number of invalid measurement times is further reduced, the flexibility of RRM measurement is improved, and the power consumption of the UE is saved.

In a possible implementation manner, when the UE performs RRM measurement on at least one downlink signal in multiple time windows, a neighbor cell list or an inter-frequency measurement set used in the RRM measurement may be determined based on the mobility of the UE according to a base station instruction or a system convention.

For example, the number of neighboring cells in the first neighboring cell list is less than the number of neighboring cells in the second neighboring cell list, and the number of frequency points in the first pilot frequency measurement set is less than the number of frequency points in the second pilot frequency measurement set. When the moving speed of the UE is lower than a preset threshold X or the UE determines to enter a measurement mode with low power consumption, a first neighbor cell list or a first pilot frequency measurement set is applied to RRM measurement, and when the moving speed of the UE is higher than a preset threshold Y or the UE determines to enter a measurement mode with normal power consumption, a second neighbor cell list or a second pilot frequency measurement set is applied to RRM measurement, wherein X is smaller than or equal to Y.

By the embodiment, the neighbor cell list or the pilot frequency measurement set which needs to be measured can be flexibly adjusted according to the mobility of the UE, so that the measurement flexibility of RRM is further improved, and the power consumption of the UE is saved.

In one possible embodiment, the combining, by the UE, the plurality of RRM measurement values includes: and the UE combines the RRM measured values of the downlink signals in the same beam direction.

In a specific implementation process, if the transmission power of the downlink signal corresponding to each RRM measurement value in the plurality of RRM measurement values is the same, the plurality of RRM measurement values may be directly combined; if the transmission power of the downlink signal corresponding to each RRM measurement value in the plurality of RRM measurement values is different, the RRM measurement values may be weighted according to the transmission power of the downlink signal corresponding to each RRM measurement value in the plurality of RRM measurement values, and then the weighted RRM measurement values are combined.

In a possible implementation manner, the combining processing of the multiple measurement values obtained by measuring different downlink signals may be performed in one RRM measurement window, or may be performed based on the multiple measurement values of the RRM measurement windows respectively corresponding to different signal sources, and the specific implementation depends on the size of the measurement window, which is not limited in the embodiment of the present invention.

The flexibility of RRM measurements is further improved by this embodiment.

In order to more clearly understand the technical solution of the embodiments of the present invention, the RRM measurement method in the present invention is described below with several possible specific embodiments, and the following embodiments mainly describe possible implementation processes of the RRM measurement method. It should be noted that the examples in the present invention are only for explaining the present invention, and are not to be construed as limiting the present invention. All embodiments that come within the spirit of the invention are to be understood as being within the scope of the invention, and it is obvious to a person skilled in the art how modifications can be made to the invention.

Example 1:

the UE in RRC _ connect performs RRM measurement on various downlink signals.

Referring to fig. 3, when the UE is in an RRC connected state and wakes up from a DRX-OFF state into an active period (activation period), the UE may perform RRM measurement based on all available downlink signals or select at least two downlink signals for measurement, for example, three types of CSI-RS, DMRS and DataSignal are illustrated in fig. 3.

Additional processing for RRM combining may be required if different downlink signals may use different beams or different transmit powers. The following combinations can be used:

mode 1: for CSI-RS, DMRS and Data Signal configured for beams with the same wave speed, because the directions of the beams are the same, the beam forming gains are the same, and if the transmission powers are also the same, RRM measurement values of the three downlink signals can be directly merged;

mode 2: if the configurations of the transmission power of different downlink signals in the CSI-RS, the DMRS and the Data Signal are different, power weighting needs to be performed on RRM measurement values corresponding to the different downlink signals.

The specific implementation mode can be as follows: selecting a measurement value of a signal source from received RRM measurement values as a reference value, and if the transmission power of the signal source corresponding to each measurement value is different, taking the reference value as a reference point, and adding or subtracting an offset value on the basis of the RRM measurement value to be combined to combine the RRM measurement values;

mode 3: if different Signal sources in the CSI-RS, the DMRS and the Data Signal have different transmission bandwidths, the transmission power needs to be calculated.

The specific implementation mode can be as follows: the total power is the number of subcarriers of each resource unit (RE) power signal, and the measurement signals with different bandwidths are weighted based on a common transmit power, and the weighting is aimed at making the transmitting end of the signal source with combination have the same power, so that the power of the received signal needs to be amplified or reduced, and then the RRM measurement values of different signal sources are combined.

Example 2:

the UE in RRC _ idle performs RRM measurement on various downlink signals.

Referring to fig. 4, when the UE is in the RRC-IDLE state and wakes up from the DRX-OFF state, RRM Measurement may be performed based on all available downlink signals or at least two downlink signals and combined, and fig. 4 illustrates an SSB and a Measurement dedicated pilot (Measurement RS) (i.e., the dedicated Measurement reference signal described above).

At this time, the UE is in the RRC IDLE state, the SSB signal is sent in the beam scanning mode, and the dedicated measurement RS also needs to send in the same beam scanning mode, so that the beamforming gains of the signals are kept similar, and the combination of the RRM measurement values of different downlink signals is realized.

Correspondingly, if the transmission powers of different downlink signals are different, signals with different powers need to be weighted, and the specific implementation may refer to the combining manner adopted in embodiment 2, which is not described herein again.

Through the embodiment, the UE can perform RRM measurement based on various downlink signals, so that RRM measurement accuracy can be improved, RRM measurement time can be shortened, and power consumption of the UE can be saved.

Example 3:

and the UE ignores the specific DRX period to carry out RRM measurement and combines the RRM measurement values obtained at any time interval.

In order to further reduce the power consumption of the UE, it is necessary to put the UE in a sleep state as much as possible, reducing the number of times of waking up the UE. Referring to fig. 5, RRM measurements of the UE may be unequal at each DRX-ON time window. The main reason is that some DRX-ON windows have data to send, and can perform RRM measurements many times, some DRX-ON windows have no data to transmit, and if a wake-up signal is configured, the UE may not even wake up to perform RRM measurements. By the non-uniform RRM measurement in time, the UE can be prevented from being frequently awakened, and the power consumption of the UE is saved.

In the specific implementation, the following cases can be treated:

1) when the UE enters the active state after receiving the wake-up signal, or preparing to receive the data signal, or preparing to receive the page signal, the UE may perform multiple RRM measurements, where the measurement downlink signal may be a dedicated measurement reference signal configured by the network, or a downlink signal is measured by using multiple RRMs in a mixed manner, which is not limited herein.

2) When the UE is DRX-OFF, the base station may limit RRM measurements of the UE and may stay in a sleep state all the time. The combining or filtering of RRM measurements may then be mainly focused ON the RRM measurements for DRX-ON, and the UE may not make RRM measurements in the corresponding DRX cycle for the case where the UE is not awake or has no data/paging signals.

By the embodiment, when the UE enters an active state after receiving the wake-up signal or performs data detection and reception in DRX-ON, the UE performs continuous RRM measurement for multiple times based ON the dedicated measurement reference signal or other downlink signals configured by the base station, and does not perform RRM measurement at other times, so that the combined filtering for RRM measurement is relaxed in a time domain, and power consumption caused by frequent wake-up of the UE is reduced.

Referring to fig. 6, based on the same inventive concept, an embodiment of the present invention further provides an RRM measurement apparatus, including:

at least one processor 201, and

a memory 202, a communication interface 203 communicatively coupled to the at least one processor 201;

wherein the memory 202 stores instructions executable by the processor 201, and the processor 201 executes the instructions stored in the memory 202 to perform the following method using the communication interface 203:

Optionally, the processor 201 is specifically configured to:

combining RRM measurements of downlink signals in the same beam direction.

Optionally, the processor 201 is specifically configured to:

Optionally, the processor 201 is further configured to:

Optionally, the processor 201 is specifically configured to:

The method and the apparatus of the present invention are based on the same inventive concept, and because the principles of the method and the apparatus for solving the problems are similar, the specific implementation manner of the operation performed by the processor 201 may refer to the corresponding steps in the RRM measurement method described above in the embodiments of the present invention, so the implementation of the apparatus and the method may be referred to each other, and repeated details are not described again.

Referring to fig. 7, based on the same inventive concept, an embodiment of the present invention further provides an RRM measurement apparatus, including:

a measurement unit 301, configured to perform RRM measurement on at least one downlink signal in multiple time windows in a measurement period, to obtain multiple RRM measurement values;

a processing unit 302, configured to perform a combination process on the multiple RRM measurement values to form an RRM measurement result of the layer 1.

Optionally, the measurement unit 301 is specifically configured to:

Optionally, the processor is specifically configured to:

combining RRM measurements of downlink signals in the same beam direction.

Optionally, the processing unit 302 is specifically configured to:

Optionally, the measurement unit 301 is further configured to:

Optionally, the measurement unit 301 is specifically configured to:

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 specific implementation manner of the operations executed by the units can refer to the corresponding steps in the RRM measurement method in the embodiment of the present invention, so the implementation of the device and the method can be referred to each other, and repeated parts are not described again.

Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium, where computer instructions are stored, and when the computer instructions are executed on a computer, the computer is caused to execute the RRM measurement method according to the embodiment of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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.

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

Claims

1. A method for RRM measurement, the method comprising:

in a measurement period, the UE performs RRM measurement on at least one downlink signal in a plurality of time windows to obtain a plurality of RRM measurement values;

and the UE combines the plurality of RRM measurement values to form a RRM measurement result of a layer 1.

2. The method of claim 1, wherein the downlink signal comprises one or more of a dedicated measurement reference signal, a channel state information measurement reference signal, CSI-RS, a data signal, a synchronization signal block, SSB, a demodulation reference signal, DMRS.

3. The method of claim 1, wherein the UE performing RRM measurements on at least one downlink signal in a plurality of time windows comprises:

4. The method of claim 1, wherein the UE performing RRM measurements on at least one downlink signal in a plurality of time windows comprises:

5. The method of claim 1, wherein the UE combining the plurality of RRM measurement values comprises:

6. The method of claim 5, wherein the UE combining the plurality of RRM measurement values comprises:

7. The method of any one of claims 1-6, wherein the UE further comprises, prior to making RRM measurements on at least one downlink signal in a plurality of time windows:

8. The method of claim 7, wherein the measurement result of the serving cell comprises a reference signal received power, RSRP, measurement value of the serving cell and/or a reference signal received quality, RSRQ, measurement value of the serving cell.

9. The method of any one of claims 1 to 6, wherein the UE performing RRM measurements on at least one downlink signal in a plurality of time windows comprises:

10. An RRM measurement apparatus, wherein the apparatus comprises:

at least one processor, and

11. The apparatus of claim 10, wherein the downlink signal comprises one or more of a dedicated measurement reference signal, a CSI-RS, a data signal, an SSB signal, a DMRS.

12. The apparatus of claim 10, wherein the processor is specifically configured to:

13. The apparatus of claim 10, wherein the processor is specifically configured to:

14. The apparatus of claim 10, wherein the processor is specifically configured to:

combining RRM measurements of downlink signals in the same beam direction.

15. The apparatus of claim 14, wherein the processor is specifically configured to:

16. The apparatus of any of claims 10-15, wherein the processor is further configured to:

17. The apparatus of claim 16, wherein the measurement result of the serving cell comprises an RSRP measurement value of the serving cell and/or an RSRQ measurement value of the serving cell.

18. The apparatus of any one of claims 10-15, wherein the processor is specifically configured to:

19. An RRM measurement apparatus, comprising:

20. A computer-readable storage medium characterized by:

the computer readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-9.