WIRELESS DEVICE PERFORMED METHOD, WIRELESS DEVICE AND NON-TRANSITORY COMPUTER READABLE MEDIUM - Patent application

Abstract

A method, a base station (BS), a user equipment (UE) and a program are provided for selecting a beam to be monitored by a UE and reducing overhead signaling in a telecommunications network. The telecommunications network 101 includes a base station function 102 connected to access nodes (ANs) 104, 105 serving UEs, and receives measurement data comprising measurements of the quality of beams 106, 107, 108 observed by the UE. At least one measurement data from a specific UE that matches the received measurement data is retrieved. The historical measurement data includes measurements of the quality of beams observed by UEs in the telecommunications network over time in a historical database. Based on the retrieved at least one measurement data from the specific UE and subsequent measurement data for the specific UE over time in the historical database, a set of beams for the UE to monitor is selected and transmitted to the UE.

Description

[Technical field]

[0001] The present invention relates generally to selecting a set of beams to be monitored, and more particularly to selecting beams based on historical measurement data of the quality of beams previously observed by user equipment. [Background technology]

[0002] Extremely High Frequency (EHF) is the International Telecommunications Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). Radio waves in this band have wavelengths from 10 to 1 millimeter, giving the band the name millimeter band or millimeter wave, sometimes abbreviated as MMW or mmW.

[0003] These frequency bands are envisioned to be used because the corresponding spectrum is less occupied compared to more frequently used frequency bands, e.g., frequency bands below 6 GHz, thereby improving system capacity. Propagation effects, however, are severe in these frequency bands. For example, signal quality may degrade rapidly with distance, e.g., diffraction, penetration and / or reflection losses may be high.

[0004] One of the proposed advances in this area is the use of beamforming with narrow beams and high directionality using extremely large antenna arrays, i.e. massive multiple-input multiple-output (MIMO) antennas.

[0005] Beamforming or spatial filtering is a signal processing technique used in arrays for directional signal transmission or reception. This is achieved by combining elements in an antenna array so that signals at certain angles experience constructive interference and other signals experience destructive interference. Beamforming can be used at both the transmitting and receiving ends to achieve spatial selectivity. The improvement compared to omnidirectional reception / transmission is known as the directivity of the array.

[0006] In accordance with the above, it may be advantageous if the measurement and reporting of multiple narrow beams, or simply beam management, is handled efficiently such that an access node (AN) is able to, for example, keep the signal quality received at the user side, i.e. at the user equipment (UE), above a predefined threshold.

[0007] It is noted that for the next generation of wireless technology, i.e., 5G New Radio (NR), 3GPP has outlined a set of procedures for beam management that indicate that a procedure for intra / inter AN beam switching can use a smaller set of beams compared to the joint beam space.

[0008] In Long Term Evolution (LTE), neither massive MIMO antennas nor mm-wave bands are supported. Therefore, LTE solutions only support the management of the entire beam space. The use of such solutions to manage several narrow beams would significantly increase the signaling load.

[0009] Currently deployed solutions are based on beam training, i.e. the beam, or set of beams, to be used for transmission is determined based on UE measurements of previously selected beams. These measurements may, for example, be out of date, which may cause spatial misalignments that may lead to beam failure. Summary of the Invention

[0010] It is an object of the present invention to provide a method for selecting beams to be monitored by a user equipment (UE), thereby reducing, among other things, overhead signaling in a telecommunications network.

[0011] It is another object to provide a base station function, a user equipment (UE), and a non-transitory computer-readable storage medium included within the presented method.

[0012] In a first aspect, a method is provided for selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, the telecommunications network comprising a base station (BS) function connected to at least one access node (AN) serving the UE.

[0013] The method includes the steps of receiving, by the BS function, measurement data from the UE comprising a measurement of a quality of a beam observed by the UE, the beam emanating from the at least one AN to the UE; retrieving, by the BS function, at least one measurement data from a specific UE that matches the received measurement data in a history database, the history database comprising historical measurement data comprising a measurement of a quality of a beam observed by a UE in the telecommunications network over time; selecting, by the BS function, a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the specific UE and based on subsequent measurement data for the specific UE over time in the history database; and transmitting, by the BS function, the selected set of beams to be monitored to the UE.

[0014] The method is based on at least the insight that historical measurements may be taken into account when the UE decides which beams to monitor. The historical database may be initially empty and filled during run-time. Thus, measurements related to the quality of beams observed by the UE may be stored in the historical database, and the relationship in time between those measurements may also be stored. The above entails that the database comprises measurements of the quality of beams observed by the UE over time.

[0015] One of the advantages of the method described above is that a high quality beam is more likely to be selected for a UE, since the selection process is based on previous measurements, even those that may relate to the same UE. This allows the selection process to take into account the movement tendencies of a particular UE.

[0016] For example, it may be detected that a particular UE moves between two geographic locations frequently, i.e., once a day, once a week, etc. Such trends may be detected in a historical database. Patterns in previous measurements of that particular UE may reflect such trends, and these patterns may be detected and used to select the beams to be monitored. Thus, the BS function is able to properly estimate the beams to be used for that particular UE.

[0017] It should be noted that, according to the present disclosure, the beams may be generated from a massive multiple-input multiple-output (MIMO) transmission technique. Each of the access nodes (ANs) may be equipped with multiple array antennas and / or multiple antennas for directional purposes.

[0018] Massive MIMO may involve, for example, a system using antenna arrays with hundreds of antennas serving tens of UEs simultaneously in the same time-frequency resource. The fundamental aspect of Massive MIMO is to enjoy all the benefits of traditional MIMO, but on a larger scale.

[0019] Each antenna is small and may be preferably fed via an optical or electrical digital bus. Massive MIMO relies on spatial multiplexing, which relies on the base station's ability to have channel knowledge of both the uplink and downlink. On the uplink, this may be achieved by having the terminals send pilots, based on which the base station estimates the channel response to each of the terminals.

[0020] According to the present disclosure, a BS function receives measurement data comprising measurements of the quality of beams observed by a UE. These beams originate from at least one access node. A UE may simultaneously observe beams from multiple access nodes (ANs). These measurements relate to the quality of the beams, e.g., signal to noise ratio, etc.

[0021] The BS function then retrieves in the historical database at least one measurement data from the particular UE that matches the received measurement data. This means that the function searches the database for historical measurement data that most closely resembles the received measurement data. For example, the received measurement data may indicate a particular order of beams, where the beams are ordered by their measured quality. The beam with the highest quality is placed first, the beam with the second highest quality is placed second, etc. The BS function then searches the historical database for measurement data with the same or similar order of beams.

[0022] The retrieved measurement data is associated with subsequent measurement data in a historical database. The historical measurement data relates to a measurement made by a particular UE at a certain time T1. The same particular UE makes another measurement at a subsequent time T2. The corresponding measurement data of this subsequent measurement is associated with the retrieved measurement data in the historical database. The corresponding measurement data is then used for selection purposes, i.e. the BS function selects from the corresponding measurement data a set of beams to be monitored by the UE.

[0023] In a final step, the selected set of beams to be monitored is transmitted to the UE.

[0024] According to the present disclosure, the BS functions may be implemented in a base station, a network node, the cloud, etc.

[0025] According to the present disclosure, measurements may be performed on a longer timescale, e.g., 50-100 ms, such as averaged over one radio frame or multiple radio frames, however, the examples described herein are also applicable to traffic measurements performed on shorter timescales, such as on a symbol, timeslot or subframe basis, or even on shorter timescales.

[0026] The selected set of beams may also be used by the BS function for a particular radio operation task, such as, for example, cell change between two cells, scheduling or resource allocation, load balancing, network planning or adjusting network parameters, controlling uplink and / or downlink power, avoiding and / or mitigating interference, etc.

[0027] The BS function may receive measurement data from the UE in any one or more of the following manners: periodically, on an event-triggered basis, for example when a measurement exceeds or falls below a threshold, and in response to a request sent to the UE by the BS function.

[0028] One of the advantages of the presented method is that the control channel between the UE and the access node is eliminated, i.e., compared to the prior art, the UE is presented with a set of beams to be monitored, the set of beams being a subset of all beams available for the UE to be monitored, and therefore the control channel only needs to be used to exchange information for that particular subset of beams.

[0029] Another advantage is that the UE does not need to monitor all beams that are available for the UE to be monitored, but is presented with a subset of beams, which reduces unnecessary processing power received by the UE.

[0030] In one example, the received measurement data comprising measurements of beam quality observed by the UE includes: - a signal-to-noise ratio for each of said beams; - a received signal strength indicator (RSSI) for each of said beams; - Reference Signal Received Power (RSRP) for each of said beams; - Reference Signal Received Quality (RSRQ) for each of said beams; Equipped with.

[0031] In another example, the method further comprises: - storing, by the BS function, the received measurement data in the historical database. Includes.

[0032] The advantage of this example is that the historical database is fully filled. As mentioned before, the historical database may be initially empty. The historical database may then be filled with all kinds of measurement data generated by UEs present in the telecommunications network. The increased amount of measurement data present in the historical database increases the chance that the received measurement data matches any of the historical measurement data present in the database.

[0033] In a further example, the method further comprises: - determining, by the BS function, based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the history database, that the UE should be handed over to a different AN in the telecommunications network; - performing, by the BS function, a handover of the UE to the determined different AN in the telecommunications network; Includes.

[0034] In a further example, the step of transmitting, by the BS function, the selected set of beams to be monitored to the UE comprises: - further comprising transmitting, by the BS function, a frequency parameter indicating to the UE how many measurements should be performed by the UE on the selected set of beams.

[0035] Here, the BS function decided how frequently measurements should be performed by the UE.

[0036] In a second aspect of the present disclosure, there is provided a method for monitoring, by a user equipment (UE), a set of beams in a telecommunications network served by an access node (AN), the method comprising: - receiving, by the UE, a set of beams to be monitored; - measuring, by the UE, a quality of the received set of beams to be monitored; - selecting, by the UE, a subset of the set of beams based on the measured quality of the received set of beams; - transmitting, by the UE, measurement data to the AN comprising a measure of a quality of the subset of beams; Includes.

[0037] The expressions, i.e., wordings, of the different aspects provided by the methods and devices according to the present disclosure should not be taken literally, but rather the wordings of the aspects are chosen merely to accurately express the rationale behind the actual functioning of the aspects.

[0038] According to the present disclosure, different aspects applicable to the above-mentioned example of the method, including advantages thereof, correspond to aspects applicable to the base station as well as to the user equipment.

[0039] In a third aspect, there is provided a network node, for example a base station (BS), configured in a telecommunications network for selecting a set of beams to be monitored by a user equipment (UE), said BS being connected to at least one access node (AN) serving said UE, said BS comprising: - a receiving device configured to receive from the UE measurement data comprising measurements of qualities of beams observed by the UE, the beams originating from the at least one AN to the UE and from at least another AN in the telecommunications network to the UE; and - a retrieval device configured to retrieve at least one measurement data from a particular UE that matches the received measurement data in a historical database, the historical database comprising historical measurement data comprising measurements of beam qualities observed by UEs in the telecommunications network over time; and - a selection device configured to select a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the history database; - a transmitting device configured to transmit the selected set of beams to be monitored to the UE; Equipped with.

[0040] In one example, the received measurement data comprising measurements of beam quality observed by the UE includes: - a signal-to-noise ratio for each of said beams; - a received signal strength indicator (RSSI) for each of said beams; - a reference signal received power (RSRP) for each of said beams; - a reference signal reception quality (RSRQ) for each of said beams; Equipped with.

[0041] In a further example, the BS may - further comprising a storage device configured for storing said received measurement data in said historical database.

[0042] In another example, the BS - a processing device configured to determine, based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the history database, that the UE should be handed over to a different AN in the telecommunications network, and to perform a handover of the UE to the determined different AN in the telecommunications network. It further comprises:

[0043] In one example, the transmitting device further comprises: - configured for transmitting a frequency parameter indicating to the UE how many measurements should be performed by the UE on the selected set of beams.

[0044] In a fourth aspect, there is provided a user equipment (UE) configured for monitoring a set of beams in a telecommunications network, the UE being configured to be served by an access node in the telecommunications network, the UE comprising: - a receiving device configured to receive a set of beams to be monitored; - a measuring device configured to measure a quality of said received set of beams to be monitored; - a selection device configured to select a subset of the set of beams based on the measured quality of the received set of beams; - a transmitting device configured to transmit measurement data to the AN comprising measurements of the quality of the subset of beams; Equipped with.

[0045] In a fifth aspect, there is provided a base station (BS) for selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, the BS being connected to at least one access node (AN) serving the UE, the BS comprising: - a receiving module for receiving measurement data from the UE comprising measurements of qualities of beams observed by the UE, the beams originating from the at least one AN to the UE and from at least another AN in the telecommunications network to the UE; - a retrieval module for retrieving at least one measurement data from a particular UE that matches the received measurement data in a history database, the history database comprising historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network over time; - a selection module for selecting a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the history database; - a transmitting module for transmitting the selected set of beams to be monitored to the UE.

[0046] In a sixth aspect, there is provided a user equipment (UE) for monitoring a set of beams in a telecommunications network, the UE being configured to be served by an access node in the telecommunications network, the UE comprising: - a receiving module for receiving a set of beams to be monitored; - a measurement module for measuring the quality of said received set of beams to be monitored; a selection module for selecting a subset of the set of beams based on the measured quality of the received set of beams; a transmitting module for transmitting measurement data comprising a measurement of a quality of the subset of beams to the AN; Equipped with.

[0047] In a seventh aspect, there is provided a computer program product comprising a readable storage medium comprising instructions that, when executed on at least one processor, cause the at least one processor to perform a method according to any of the examples given above.

[0048] The above and other features and advantages of the present disclosure will be best understood from the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate equivalent parts or parts performing the same or comparable functions or operations, and in which: [Brief description of the drawings]

[0049] [Figure 1] FIG. 2 illustrates an example of how measurement data can be obtained by a user equipment (UE). [Diagram 2] FIG. 1 shows an example of a diagram displaying basic aspects of the present disclosure. [Diagram 3] FIG. 1 illustrates a portion of a telecommunications network according to the present disclosure. [Figure 4] FIG. 13 is a diagram showing a structure in which measurement data is stored in a history database. [Diagram 5] FIG. 1 illustrates an example of a method according to the present disclosure. [Figure 6] FIG. 1 illustrates another example of a method according to the present disclosure. [Figure 7] FIG. 1 illustrates an example of base station functionality according to the present disclosure. [Figure 8] FIG. 2 illustrates an example of user equipment according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0050] 1 shows example 1 of how measurement data can be acquired by a user equipment (UE). This example 1 is described with respect to selecting a set of beams to be monitored for a particular UE.

[0051] The beam selection procedure for beam tracking can be described as follows: A base station (BS) function serving a particular UE determines a set of beams from at least one directly connected access node (AN) and another set of beams from at least one AN belonging to one neighbor BS. The serving BS relies on available historical statistics of the UE and measurement data from its served UE to determine these sets of beams that maintain sufficient spatial alignment of these beams with its served UE.

[0052] In this example, when a served UE reports measurement data to its serving BS for a portion, e.g., M, of beams received above some predefined threshold, the served UE measures the quality of the received signal for every determined beam for several times during which measurements are considered within a determined period T', e.g., a determined beam reporting period T≧T'.

[0053] The number of beams that can be monitored by the UE can be larger than the amount of feedback that the UE is able to report to the BS functionality, i.e. M. During the measurement period T', the UE may store all kinds of quality values ​​of detected and decoded beams for all beams in the determined set. At the end of T', the UE may select the M beams to be reported, which are the beams with the highest signal quality during the measured time T'. In the current scenario, M is fixed and depends on the UE functionality.

[0054] FIG. 1 shows the monitored beams, six beams as illustrated with AN2a, AN2b and AN1b. Furthermore, M=3 and T' comprises five time slots. The UE may store all values ​​and after T' the UE may select the highest three values ​​it can find in the table, e.g. as indicated by stars in the grid. The UE then reports the corresponding measurement data, i.e. the quality of the beams, for the entire time T' to the BS. Other means of selecting the highest value of M are also possible. For example, the UE may select the M highest values ​​after pre-processing, e.g. time averaging, of all stored values.

[0055] The serving BS function receives measurement data from its served UEs. The BS function then searches in a historical database for the most likely or most similar sample number, i.e. measurement data, to the received measured measurement data. An estimate of a metric value related to the measurement data can then be obtained based on the most similar samples several time instants ahead and for all relevant beams. By using the estimated metric value, the serving BS function can determine the set of beams from its AN that will give the UE an improved spatial alignment for several time instants ahead.

[0056] This may result in, for example, an intra-BS beam handover. Furthermore, and based on the estimated metric values, the serving BS may determine another set of beams from at least the neighbor BS's AN that can potentially provide the best spatial alignment to its served UE. This may further result in an inter-BS beam handover. Furthermore, the serving BS may determine the values ​​of T', T, and may select M. Finally, the serving BS informs its served UE of the set of selected beams to be monitored and the determined parameter values.

[0057] FIG. 2 shows an example of FIG. 51 displaying a basic aspect of the present disclosure.

[0058] Figure 52 provides a basic overview of the steps taken in accordance with the present disclosure. Beam measurements are performed by the UE 112 and those beam measurements are provided 302 to the base station function 102.

[0059] The base station function 102 may store these measurements, i.e., measurement data, in a historical database for further use 52. Furthermore, the base station function 102 retrieves from the same historical database at least one measurement data that best matches the measurement data received from the UE 112. Based on the retrieved measurement data, the base station function 112 selects 304 a particular beam on which the UE 112 should perform measurements during a subsequent time period. The selected beam is provided 305 to the UE 112.

[0060] The communication between the UE 112 and the base station function 102 is provided over the air interface, i.e. over the air. Typically, control channel messages over a control channel are utilized. Reducing the amount of beams on which the UE 112 must perform quality measurements also reduces the amount of signaling between the UE 112 and the base station function 102. This therefore improves the efficiency of the telecommunications network.

[0061] Further, it should be noted that the selected set of beams is provided to the UE 112. In fact, it may be identifiers of the selected beams, rather than the beams themselves, that are provided to the UE 112. Thus, transmitting the set of beams may be interpreted as transmitting identities of the selected beams to the UE 112.

[0062] FIG. 3 illustrates a portion of a telecommunications network 101 according to the present disclosure.

[0063] The telecommunications network 101 comprises two base stations 103, 111, the first base station 103 having two access nodes (ANs) 104, 105 and the second base station 111 having another two ANs 109, 110.

[0064] A base station (BS) function 102 is provided, which is configured to perform beam management for UE tracking. It should be noted that the BS function 102 may be implemented in a base station 103, 111, or any other node in a telecommunications network. The BS function 102 may be provided as cloud serving, with processing being performed in the cloud.

[0065] Here, a user equipment (UE) 112 is shown configured to move along a particular trajectory 113. One of the aspects of the disclosure is that the trajectory may be estimated based on previous measurements performed by the same or any other UE. In this particular scenario, the UE 112 is configured to monitor six beams 106, 107, 108. The beam referenced with reference number 106 originates from the AN reference number 105. The beam referenced with reference number 107 originates from the AN reference number 110. The beam referenced with reference number 108 originates from the AN reference number 109.

[0066] The UE 112 monitors each of these beams 106, 107, 108 for a predefined period of time, e.g., multiple time slots or multiple symbols. This means that the UE 112 can perform quality measurements on those beams 106, 107, 108. The UE 112 thus generates measurement data, which relates to the quality of the monitored / measured beams 106, 107, 108.

[0067] According to the present disclosure, the quality of the beams may be measured in terms of signal-to-noise ratio or any other type of measurement. Furthermore, measurements on the quality of the beams 106, 107, 108 may be performed in parallel, substantially in parallel, or subsequent to one another.

[0068] The UE 112 may then select a subset of the monitored beams 106, 107, 108. In this particular example, the UE may select a beam as referenced by reference numeral 106. Alternatively, the UE 112 may provide all measurement data, i.e., measurement data from all six beams 106, 107, 108, to the AN 105, and the UE 112 is connected to the base station via the AN 105, as indicated by reference numeral 103.

[0069] The BS function 102 then retrieves at least one measurement data from the particular UE that matches the measurement data from the UE 112 in the historical database 114. The historical database 114 comprises historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network over time.

[0070] Thus, measurement data provided by UEs in a telecommunications network may be stored in the history database 114. The measurement data may be provided with a timestamp, or any other metadata, indicative of the moment at which the corresponding measurement was made. This allows patterns to be detected in the history database. The measurement data may be associated with each other based on the provided timestamps and, for example, based on the identity of the UEs that made those particular corresponding measurements.

[0071] The BS function 102 then selects a set of beams to be monitored by the UE 112 based on at least one measurement data retrieved from the particular UE and based on subsequent measurement data of the particular UE over time in the historical database.

[0072] In this particular scenario, the trajectory 113 may be estimated based on previous measurements of that particular UE stored in the history database 114. That particular information may be used to initiate a handover, such as an intra-BS handover or an inter-BS handover, of the UE 112 in the telecommunications network.

[0073] FIG. 4 shows the structure in which the measurement data is stored in the historical database.

[0074] The stored measurement data can be conceptually visualized as data stored using three dimensions 202, 203, 204. The first dimension relates to the identity of the beam, i.e. as indicated by reference numeral 202. The second dimension relates to the identity of the sample, i.e. as indicated by reference numeral 203. The third dimension relates to the time, i.e. as indicated by reference numeral 204.

[0075] In accordance with the present disclosure, the BS function retrieves at least one measurement data from a particular UE that matches the received measurement data. This may be accomplished as follows:

[0076] The BS function may select one or more slices of the historical database, where the slices are created in the data structure 201 in a plane defined by the dimensions indicated by reference numbers 202 and 204. A particular slice thus covers a single sample, i.e., measurements made by a particular UE.

[0077] Each of the slices comprises measurement data, i.e. measurements of the quality of the respective beams, and a time indication when those measurements were performed. The BS function may therefore select one or more of the slices that most closely resemble the received measurement data, i.e. the actual measurements performed by the UE.

[0078] Based on the selected slice, the BS function may select the beam that has the highest signal to noise ratio at the previous time instant, i.e., in the subsequent time frame in that same slice.

[0079] FIG. 5 illustrates an example of a method 301 according to the present disclosure.

[0080] Method 301 is directed to selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, the telecommunications network comprising a base station (BS) function connected to at least one access node (AN) serving the UE.

[0081] The method includes a step 302 of receiving, by the BS function, measurement data from the UE comprising measurements of the quality of beams observed by the UE, the beams originating from the at least one AN to the UE and from at least another AN in the telecommunications network to the UE.

[0082] The above involves the UE performing quality measurements on the beams that it has been requested to monitor. These measurements, or a subset thereof, are provided to the BS function using the measurement data.

[0083] In a next step, the BS function retrieves 303 at least one measurement data from a particular UE that matches the received measurement data in a historical database, the historical database comprising historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network over time.

[0084] According to the present disclosure, a match means that the BS function finds the historical measurement data in the historical database that best matches the received measurement data. The historical measurement data following the matched historical measurement data can then be used by the BS function to select a set of beams to be monitored by the UE as described below.

[0085] Thus, in a next step, the BS function selects a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the historical database 304. Thus, the BS function may be able to perform an educated guess as to which beams may be important for the UE, i.e. which beams may have the highest quality for the UE.

[0086] In a final step, the BS function transmits the selected set of beams to be monitored to the UE.

[0087] FIG. 6 illustrates another example of a method 401 according to the present disclosure.

[0088] The method 401 is directed to monitoring, by a user equipment (UE), a set of beams in a telecommunications network served by an access node (AN).

[0089] The method comprises: receiving 402, by the UE, a set of beams to be monitored; measuring 403, by the UE, the quality of the received set of beams to be monitored; selecting 404, by the UE, a subset of the set of beams based on the measured quality of the received set of beams; transmitting 405, by the UE, measurement data to the AN comprising a measure of the quality of the subset of beams; Includes.

[0090] FIG. 7 illustrates an example of base station functionality 501 according to the present disclosure.

[0091] Here, the base station functionality 501 is described with respect to a particular base station, however, it should be noted that the base station functionality 501 may be provided in any network node, distributed among network nodes, serving running in a cloud, etc.

[0092] The base station function 501 is configured to select a set of beams to be monitored by a user equipment (UE) in a telecommunications network, and the BS is configured to be connected to at least one access node (AN) serving the UE.

[0093] The BS function 501 comprises a receiving device 502 configured to receive measurement data from the UE comprising a measurement value of the quality of a beam observed by the UE, the beam emanating from the at least one AN to the UE.

[0094] The BS function 501 further comprises a retrieval device 505 configured to retrieve at least one measurement data from a particular UE matching the received measurement data in a historical database, the historical database comprising historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network over time.

[0095] The BS function 501 further comprises a selection device 504 configured to select a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the history database.

[0096] The BS function 501 further comprises a transmitting device 509 configured for transmitting the selected set of beams to be monitored to the UE.

[0097] The BS function 501 comprises a control unit 507 and a memory 506 , and the control unit 507 is connected to the retrieval device 505 , the selection device 504 , the reception device 502 and the transmission device 509 .

[0098] Incoming data packets or messages pass through input terminal 503 before they reach receiving equipment 502, or a receiving module. Outgoing data packets or messages pass through or are sent by transmitting equipment 509, or a transmitting module, via output terminal 508.

[0099] FIG. 8 illustrates an example of a user device 601 according to the present disclosure.

[0100] A user equipment (UE) 601 is configured for monitoring a set of beams in a telecommunications network, the UE being configured to be served by an access node in the telecommunications network. a receiving device 602 configured to receive the set of beams to be monitored; - a measuring device 605 configured to measure the quality of said received set of beams to be monitored; a selection device 604 configured to select a subset of said set of beams based on said measured quality of said received set of beams; - a transmitting device 609 configured to transmit measurement data comprising measurements of the quality of said subset of beams to said AN; Equipped with.

[0101] The UE 601 comprises a control unit 607 and a memory 606 , the control unit 607 being connected to a receiving device 602 , a selecting device 604 , a measuring device 605 and a transmitting device 609 .

[0102] Incoming data packets or messages pass through an input terminal 603 before they reach a receiving device 602, or receiving module. Outgoing data packets or messages pass through or are sent by a transmitting device 609, or transmitting module, via an output terminal 608.

[0103] The present invention is not limited to the embodiments disclosed above, which can be modified and improved by those skilled in the art beyond the scope of the invention disclosed in the appended claims without the need to apply inventive skills.

Claims

1. 1. A method performed by a wireless device served by an access node in a wireless network, comprising: receiving from the access node using a control channel message a set of beams to measure, the set including an identifier for each beam to measure, and a determined time period for performing the measurements; Measuring a reference signal received quality (RSRQ) for each of the beams; selecting a subset of the measured beams having the highest measurement quality; reporting to the access node a measurement quality of each beam in the selected subset of beams; Including, selecting the subset of measured beams includes selecting beams having a measurement quality above a predetermined threshold; A method, wherein the reporting includes ordering the selected beams according to their measured quality.

2. For each beam in the selected subset of beams: a signal to noise ratio for each of said beams; a received signal strength indicator (RSSI) for each of said beams; a reference signal received power (RSRP) for each of the beams; and measuring and reporting at least one of the following: The method of claim 1 further comprising:

3. The method of claim 1 , wherein the subset comprises a predetermined number of beams.

4. The method of claim 1 , wherein the plurality of beams comprises beams emanating from at least two different access nodes in the wireless network.

5. The method of claim 1 , further comprising pre-processing the measurements prior to said selecting.

6. The method of claim 5 , wherein the pre-processing comprises performing a time averaging of the stored values.

7. A wireless device, comprising: A receiver; A transmitter; a processing circuit; the processing circuitry is operatively connected to the receiver and the transmitter; and receiving, from an access node serving the wireless device, a set of beams to measure, the set including an identifier for each beam to measure, and a determined time period for performing the measurements, using a control channel message; Measuring a reference signal received quality (RSRQ) for each of the beams; selecting a subset of the measured beams having the highest measurement quality; reporting a measured quality of each beam in the selected subset of beams to an access node serving the wireless device; is configured to run the processing circuitry is configured to select the subset of measured beams by selecting beams having a measurement quality above a predetermined threshold; the processing circuitry is configured to, in the reporting, order the selected beams according to their measurement qualities. Wireless devices.

8. The processing circuitry comprises: For each beam in the selected subset of beams: a signal to noise ratio for each of said beams; a received signal strength indicator (RSSI) for each of said beams; a reference signal received power (RSRP) for each of the beams; and measuring and reporting at least one of the following: The wireless device of claim 7 , further configured to:

9. The wireless device of claim 7 , wherein the subset comprises a predetermined number of beams.

10. The wireless device of claim 7 , wherein the plurality of beams includes beams emanating from at least two different access nodes in the wireless network.

11. The wireless device of claim 7 , wherein the processing circuitry is configured to pre-process the measurements prior to the selecting.

12. The wireless device of claim 11 , wherein the pre-processing comprises performing a time averaging of stored values.

13. A non-transitory computer readable medium having stored thereon computer program instructions that, when executed by a processing circuit of a wireless device, cause the wireless device to: receiving, from an access node serving the wireless device, a set of beams to measure, the set including an identifier for each beam to measure, and a determined time period for performing the measurements, using a control channel message; Measuring a reference signal received quality (RSRQ) for each of the beams; selecting a subset of the measured beams having the highest measurement quality; reporting a measured quality of each beam in the selected subset of beams to an access node serving the wireless device; It is configured to run selecting the subset of measured beams includes selecting beams having a measurement quality above a predetermined threshold; and reporting includes ordering the selected beams according to their measured qualities. A non-transitory computer-readable storage medium.

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