Component carriers to measure
By enabling UE to select and indicate a subset of CCs for measurement, the solution addresses measurement burdens and delays, optimizing network performance and resource use in carrier aggregation scenarios.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NOKIA SOLUTIONS (SHANGHAI) CO LTD
- Filing Date
- 2024-11-18
- Publication Date
- 2026-05-21
AI Technical Summary
Existing communication technologies face challenges in efficiently managing measurement burdens and delays for component carriers (CCs), particularly in scenarios involving intra-band and inter-band carrier aggregation, leading to suboptimal network performance and handover interruptions.
A solution is proposed where user equipment (UE) determines and indicates a subset of CCs to measure, allowing for more informed network decisions and reducing measurement requirements, thereby optimizing UE resources and minimizing delay.
This approach enhances communication performance by reducing measurement delays and improving network responsiveness through efficient resource allocation and measurement reporting.
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Figure CN2024132646_21052026_PF_FP_ABST
Abstract
Description
COMPONENT CARRIERS TO MEASUREFIELD
[0001] Various example embodiments relate to the field of communication and in particular, to methods, devices, apparatuses and a computer readable storage medium for determination of component carriers (CCs) to measure.BACKGROUND
[0002] A communication network may be seen as a facility that enables communications between two or more communication devices, or provides communication devices access to a data network. A mobile or wireless communication network is one example of a communication network.
[0003] Such communication networks operate in accordance with standards, such as those promulgated by 3GPP (Third Generation Partnership Project) or ETSI (European Telecommunications Standards Institute) . Examples of such standards include the so-called 5G (5th Generation) standard, 6G (6th Generation) standard or other standards promulgated by 3GPP.SUMMARY
[0004] In general, example embodiments of the present disclosure provide a solution for determination of component carriers (CCs) to measure, for example, in carrier aggregation. With this solution, the measurement burden and delay are reduced by performing measurement selection of CCs, thereby improving the performance of communication with measurement reporting.
[0005] In a first aspect, there is provided an apparatus. The apparatus comprises at least one processor and at least one memory storing instructions. The instructions, when executed by the at least one processor, cause the apparatus at least to determine, from a set of CCs configured to be measured by the apparatus, a first subset of CCs to measure. The apparatus is further caused to transmit, to a network device, a first message indicating the first subset of CCs.
[0006] In a second aspect, there is provided an apparatus. The apparatus comprises at least one processor and at least one memory storing instructions. The instructions, when executed by the at least one processor, cause the apparatus at least to receive, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.
[0007] In a third aspect, there is provided a method. The method comprises determining, from a set of CCs configured to be measured by a terminal device, a first subset of CCs to measure. The method further comprises transmitting, to a network device, a first message indicating the first subset of CCs.
[0008] In a fourth aspect, there is provided a method. The method comprises receiving, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.
[0009] In a fifth aspect, there is provided an apparatus. The apparatus comprises means for determining, from a set of CCs configured to be measured by the apparatus, a first subset of CCs to measure. The apparatus further comprises means for transmitting, to a network device, a first message indicating the first subset of CCs.
[0010] In a sixth aspect, there is provided an apparatus. The apparatus comprises means for receiving, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.
[0011] In a seventh aspect, there is provided a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to any one of the above third and fourth aspects.
[0012] In an eighth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus to perform at least the method according to any one of the above third and fourth aspects.
[0013] In a ninth aspect, there is provided an apparatus. The apparatus comprises determining circuitry configured to determine, from a set of CCs configured to be measured by the apparatus, a first subset of CCs to measure. The apparatus comprises transmitting circuitry configured to transmit, to a network device, a first message indicating the first subset of CCs
[0014] In a tenth aspect, there is provided an apparatus. The apparatus comprises receiving circuitry configured to receive, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.
[0015] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Some example embodiments will now be described with reference to the accompanying drawings, in which:
[0017] FIG. 1 illustrates an example communication network in which embodiments of the present disclosure may be implemented;
[0018] FIG. 2 illustrates a signaling diagram illustrating an example of process for selection of CCs for measurements according to some embodiments of the present disclosure;
[0019] FIG. 3 illustrates a flowchart illustrating an example of process for selection of CCs for measurements according to some embodiments of the present disclosure;
[0020] FIG. 4 illustrates a signaling diagram illustrating an example of process for selection of CCs for measurements according to some embodiments of the present disclosure;
[0021] FIG. 5 illustrates a signaling diagram illustrating an example of process for selection of CCs for measurements according to some embodiments of the present disclosure;
[0022] FIG. 6 illustrates a flowchart of a method implemented at an apparatus according to some embodiments of the present disclosure;
[0023] FIG. 7 illustrates a flowchart of a method implemented at an apparatus according to some embodiments of the present disclosure
[0024] FIG. 8 illustrates a simplified block diagram of an apparatus that is suitable for implementing embodiments of the present disclosure; and
[0025] FIG. 9 illustrates a block diagram of an example computer readable medium in accordance with some embodiments of the present disclosure.
[0026] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0027] Principles of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0028] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0029] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0030] It shall be understood that although the terms “first” and “second” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0031] The terminology used herein is for describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0032] As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable) : (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0033] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0034] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) and the sixth generation (6G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0035] As used herein, the term “network device” and “access network device” refer to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a transmission reception point (TRP) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
[0036] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0037] In telecommunication technologies, one of the objectives is measurement delay reduction (for example, frequency range (FR) 2-1 (Synchronization Signal and PBCH block) SSB based layer (L3) measurement delay reduction) , and carrier specific scaling factor (CSSF) optimization is to be considered for UE not in multiple-Rx simultaneous reception mode.
[0038] When optimizing CSSF outside gap in Carrier Aggregation (CA) / Dual Connectivity (DC) for L3 measurement delay reduction, user equipment (UE) may only need to measure one serving CC per band if multiple serving CCs are in the same band.
[0039] Two options may be considered to enable the UE to measure single serving CC per band. Option 1 may allow the UE to select one CC to measure when multiple measurement objects (MOs) are configured in the band, i.e. a UE based selection approach. Option 2 may be based on network indication i.e. it is up to network to indicate which CC to measure among the multiple MOs. A MO may indicate at least the frequency location or carrier frequency of reference signals to be measured. In case of SSB-based measurement, the MO may refer to the center frequency of SSB.
[0040] For option 1, UE may have the best knowledge of the measurement status on all the configured CCs hence the UE is able to determine which CC needs to be measured and on which CCs the measurement may be skipped. However, the selection of the CCs is unknown to network. From network point of view, it would be misleading if UE automatically skipped the measurement on some CCs where the measurement is configured. The UE measurement behaviour need to be aligned with the network configuration or understanding. For option 1, there may be a problem to be solved on how to ensure the network has the same understanding on the measurement behaviour at UE side (i.e. which CCs the UE measures and which to omit) .
[0041] For option 2, the UE measurement on single CC per band is up to network indication. However, when NW configures the UE with the CCs to measure, the NW may not have any information on how the different CCs are measured at the UE and which CCs may be expected to measure similar RSRP values as other CCs. In order for network to have a clear overview over the measured or non-measured CCs, UE indication of preferred or suggested CCs to be measured is needed. For option 2, there may be a problem to be solved on how to enable the UE to assist the NW in configuring which CCs to measure and which to omit.
[0042] In addition to enhance mobility performance, the UE may be able to initiate measurement reporting for carriers that are not currently being measured or configured with MOs. This is because handover decisions often rely on UE measurement reports. The UE measurement reports may include potential target cells. There are additional network benefits in ensuring that the UE reports from MOs, whether they are currently being measured or not. Enabling UE-triggered reports from such unmeasured MOs may minimize the impact on the network, as it eliminates the need to modify existing handover algorithms and procedures to accommodate handovers to cells for which no measurement report has been received.
[0043] Therefore, it is essential to reduce the UE measurement burden and requirements for the discussed scenario involving intra-band collocated MOs, whether serving or not. This approach may aim to minimize the impact on network implementation and maintain system performance, particularly in terms of handover interruption delay.
[0044] According to some embodiments of the present disclosure, there is provided a solution for determination of component carriers (CCs) to measure, which may allow a UE to indicate a CC (s) / cell (s) / MO (s) so that its measurement results can be used for other CCs / cells / MOs in the same band. The proposed solution may enable the UE to report to NW the measured CCs (for Option 1) or suggested CCs to measure (for Option 2) . The proposed solution may be utilized for the intra-band CA scenario or inter-band CA scenario. With this solution, the measurement delay is reduced by measurement selection for the multiple CCs, thereby improving the performance of communication with measurement reporting for the selected CCs. Principles and embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0045] FIG. 1 illustrates a schematic diagram of an example communication network 100 in which some embodiments of the present disclosure may be implemented. As shown in FIG. 1, the communication network 100 may include terminal device 110, network device 120.
[0046] It is to be understood that the number of network devices and terminal devices is only for the purpose of illustration without suggesting any limitations. The system 100 may include any suitable number of terminal devices and network devices with any suitable number of cell adapted for implementing embodiments of the present disclosure.
[0047] Communications in the communication system 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) , the fifth generation (5G) and the sixth generation (6G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0048] FIG. 2 illustrates a signaling diagram illustrating an example of process 200 for measurement reporting according to some embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1. The process 200 may involve the terminal device 110, the network device 120 as illustrated in FIG. 1.
[0049] In FIG. 2, terminal device 110 may determine 210, from a set of CCs configured to be measured by terminal device 110, a first subset of CCs selected by terminal device 110 to measure. The terminal device 110 may transmit 220 to a network device, a first message indicating the first subset of CCs.
[0050] In some embodiments, the selection of measured CCs or suggested CCs to measure by terminal device 110 may be based on previous RSRP measurements on the CCs, correlation between measurement samples or based on network suggested CCs. After terminal device 110 transmits an indication of the selected CC (s) / cell (s) / MO (s) , the CSSF and the measurement delay may be determined based on the indicated CC (s) / cell (s) / MO (s) in the same band.
[0051] Thus the present disclosure propose the terminal device 110 may determine and indicate to the network device 120 the CCs the terminal device 110 propose to measure. In this way, it may reduce the number of measurements the terminal device 110 needs to perform and leads to more efficient use of UE resources, such as battery life and processing power. The network device 120 may make more informed decisions about which CCs to configure for measurement based on feedback of terminal device 110. Also, the measurement delay may be minimized, leading to faster and more responsive network operations, particularly in dynamic environments and better allocation of network resources and improved overall network performance.
[0052] FIG. 3 illustrates a flowchart illustrating an example of process 300 for the selection of CCs for measurements according to some embodiments of the present disclosure. For the purpose of discussion, the process 300 will be described with reference to FIG. 1. The process 300 may involve the terminal device 110, the network device 120 as illustrated in FIG. 1. For option 1, the process 300 may comprise operations or steps 301-306 and 309. For option 2, the process 300 may comprise operations or steps 301-304 and 307-309.
[0053] In FIG. 3, at 301, terminal device 110 may receive a message from the network device 120 configuring the set of CCs or MOs. The UE may be configured with a set of CCs or MOs. This set of CCs or MOs may be the configured CCs or MOs.
[0054] At 302, the terminal device 110 may start performing measurements on all configured CCs.
[0055] At 303, the terminal device 110 may transmit the measurement reports on the configured MOs to the network device 120.
[0056] At 304, after the measurement reporting for the MOs is sent to network device 120, the network device 120 may indicate to the terminal device 110 the permission for choosing or suggesting CC (s) for measurements. The indication of the network device 120 may be based on the measurement report the network device 120 received and the analysis the network device 120 has done on the CC measurement results, or based on the terminal device 110 capability of CSSF optimization.
[0057] In some embodiments for option 1, at 305, the terminal device 110 may then evaluate the conditions for applying the measurement selection based on the previous measurements, or a fresh measurement. Then, the terminal device 110 may notify the network device 120 about the determination of the terminal device 110 for the CCs / cells / MOs to be measured on the band. When receiving the indication, network device 120 may know the terminal device 110 may start to measure single CC per band and on which CC the terminal device 110 is going to measure.
[0058] At 306, the terminal device 110 may start the measurements on the selected CCs / cells / MOs, and report the measurements to the network device 120. The network device 120 may apply the measurement result of the indicated CC to other CCs in the same band.
[0059] In some embodiments for option 2, at 307 after the operations 301-304, the terminal device 110 may then evaluate the conditions for applying the measurement selection based on the previous measurements, or a fresh measurement. Then, the terminal device 110 may notify the network device 120 about suggestion on CCs to be measured by the terminal device 110. The terminal device 110 may also keep measuring all configured MOs.
[0060] At 308, when receiving the indication, the network device 120 may configure the corresponding MOs for measurements based on the indication. Alternatively, the network device 120 may indicate which CCs to be measured and which CCs may be omitted on the band.
[0061] After 306 or 308, at 309, in order not to lose measurement accuracy, network device 120 may also set a timer for performing measurements on reference CCs, and after that the terminal device 110 may perform measurements on all configured MOs to refresh evaluation of the terminal device 110 for conditions for choosing or suggesting a CC. Then the process 300 may return back to the 302.
[0062] The more details of the solution will be discussed with FIG. 4 and FIG. 5. FIG. 4 and FIG. 5 may be message sequence diagrams describing the signaling and procedure involved in the disclosure.
[0063] FIG. 4 illustrates a signaling diagram illustrating an example of process 400 for selection of CCs for measurements according to some embodiments of option 1 of the present disclosure. For the purpose of discussion, the process 400 will be described with reference to FIG. 1. The process 400 may involve the terminal device 110, the network device 120 as illustrated in FIG. 1.
[0064] At 401, the terminal device 110 may indicate to the network device 120 whether the terminal device 110 is supporting the new feature of selection of CCs to measure. If the terminal device 110 supports this feature, it means that the network device 120 may request the terminal device 110 to indicate to the network device 120 the CCs that the terminal device 110 would propose to measure.
[0065] At 402, the network device 120 may transmit a message to the terminal device 110 configuring MOs for measurement by the terminal device 110. In some embodiments, the configured MOs comprise a set of CCs to be measured.
[0066] At 403, the terminal device 110 may perform measurements on the set of CCs configured at 402.
[0067] At 404, the terminal device 110 may send measurement report with measurements of the set of CCs to the network device 120.
[0068] At 405, the network device 120 may send a “Request for selected CCs” message to the terminal device 110. The “Request for selected CCs” message may request the terminal device 110 to propose a number of CCs that may reflect the measurement results of other configured CCs in the same band. With the selected CCs, terminal device 110 may be able to deliver measurement result for all configured CCs, while only measuring the selected CCs (asubset of the set of configured CCs) .
[0069] At 406, the terminal device 110 may evaluate the measurements from all configured CCs and determine a number of CCs proposed for measurements (afirst subset of CCs) .
[0070] In some embodiments, the evaluation may be based on layer 3 (L3) or layer 1 (L1) measurements on all configured CCs, CSI measurements on all configured CCs, at least one difference between measurements on all configured CCs, at least one correlation between measurement samples of all configured CCs, or configuration information of all configured CCs.
[0071] In some embodiments, at 405, the “Request for selected CCs” message may comprise a third subset of CCs of the set of configured CCs, suggested by the network device 120 to be measured by the terminal device 110. At 406, the terminal device 110 may evaluate the measurements from the set of configured CCs or the third subset of CCs if configured, and determine a number of CCs proposed for measurements (afirst subset of CCs) .
[0072] In some embodiments, the “Request for selected CCs” message may comprise RSRP threshold for determining the first subset of CCs.
[0073] At 407, the terminal device 110 may indicate to the network device 120 the CCs that the terminal device 110 may measure (afirst subset of CCs) . The first subset of CCs may be considered as reference CCs.
[0074] At 408, the terminal device 110 may perform measurements on the first subset of CCs selected by the terminal device 110.
[0075] At 409, the terminal device 110 may transmit a measurement report to the network device 120 with the measurements of the first subset of CCs.
[0076] In some embodiments, after receiving this measurement report, the network device 120 may apply at least one measurement of the first subset of CCs to at least one other CC in the same band.
[0077] FIG. 5 illustrates a signaling diagram illustrating an example of process 500 for selection of CCs for measurement according to some embodiments of option 2 of the present disclosure. For the purpose of discussion, the process 500 will be described with reference to FIG. 1. The process 500 may involve the terminal device 110, the network device 120 as illustrated in FIG. 1.
[0078] At 501, the terminal device 110 may indicate to the network device 120 whether the terminal device 110 is supporting the new feature of selection of CCs to measure. If the terminal device 110 supports this feature, it means that the network device 120 may request the terminal device 110 to indicate to the network device 120 the CCs that the terminal device 110 would propose to measure.
[0079] At 502, the network device 120 may transmit a message to the terminal device 110 configuring MOs for measurement by the terminal device 110. In some embodiments, the configured MOs comprise a set of CCs to be measured.
[0080] At 503, the terminal device 110 may perform measurements on the set of CCs at 502.
[0081] At 504, the terminal device 110 may send measurement report with measurements of the set of CCs to the network device 120.
[0082] At 505, the network device 120 may send a “Request for selected CCs” message to the terminal device 110. The “Request for selected CCs” message may request the terminal device 110 to propose a number of CCs that may reflect the measurement results of other configured CCs in the same band. With the selected CCs, terminal device 110 may be able to deliver measurement result for all configured CCs, while only measuring the selected CCs (asubset of the set of configured CCs) .
[0083] At 506, the terminal device 110 may evaluate the measurements from all configured CCs and determine a number of CCs proposed for measurements (afirst subset of CCs) .
[0084] In some embodiments, the evaluation may be based on layer 3 (L3) or layer 1 (L1) measurements on all configured CCs, CSI measurements on all configured CCs, at least one difference between measurements on all configured CCs, at least one correlation between measurement samples of all configured CCs, or configuration information of all configured CCs.
[0085] In some embodiments, at 505, the “Request for selected CCs” message may comprise a third subset of CCs of the set of configured CCs, suggested by the network device 120 to be measured by the terminal device 110. At 506, the terminal device 110 may evaluate the measurements from the set of configured CCs or the third subset of CCs if configured, and determine a number of CCs proposed for measurements (afirst subset of CCs) .
[0086] In some embodiments, the “Request for selected CCs” message may comprise RSRP threshold for determining the first subset of CCs.
[0087] At 507, the terminal device 110 may indicate to the network device 120 the CCs that the terminal device 110 may propose to measure (afirst subset of CCs) . The first subset of CCs may be considered as reference CCs.
[0088] At 508, the network device 120 may determine and configure measurements on selected CCs (asecond subset of CCs) . The second subset of CCs to be measured by the terminal device 110 may be based on the feedback of the terminal device 110 (afirst subset of CCs) , but it is the decision of the network device 120 whether the network device 120 uses the feedback of the terminal device 110 or not. For example, the second subset of CCs may be same as the first subset of CCs. For another example, the second subset of CCs may be different from the first subset of CCs.
[0089] The network device 120 may transmit a second message (for example, message “Measure Selected CCs” ) indicating the second subset of CCs to be measured by the terminal device 110.
[0090] At 509, the terminal device 110 may perform measurements on the second subset of CCs.
[0091] In some embodiments, at 508, the second message may comprise a timer. The timer may indicate a time period during which the terminal device 110 is to perform the at least one measurement on the second subset of CCs. For example, a value of the timer may indicate a time period during which the terminal device 110 is to perform the at least one measurement on the second subset of CCs. If the timer expires, the terminal device 110 may perform at least one measurement on all configured CCs.
[0092] In some embodiments, after indicating the first subset of CCs at 507, the terminal device 110 may perform at least one measurement on all configured CCs prior to receiving the second message (message “Measure Selected CCs” ) at 508.
[0093] At 510, the terminal device 110 may transmit a measurement report to the network device 120 with the measurements of the second subset of CCs.
[0094] In some embodiments, after receiving this measurement report, the network device 120 may apply at least one measurement of the second subset of CCs to at least one other CC in the same band.
[0095] FIG. 6 illustrates a flowchart of a method 600 implemented at an apparatus according to some other embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110 with reference to FIG. 1. This apparatus may be implemented as the terminal device 110.
[0096] At block 610, the terminal device 110 may determine, from a set of CCs configured to be measured by the terminal device 110, a first subset of CCs to measure. At block 620, the terminal device 110 may transmit, to a network device 120, a first message indicating the first subset of CCs.
[0097] In some embodiments, the terminal device 110 may further: perform at least one measurement on the first subset of CCs, and transmit, to the network device 120, a measurement report for the at least one measurement on the first subset of CCs.
[0098] In some embodiments, the terminal device 110 may further: receive, from the network device 120, a second message indicating a second subset of CCs of the set of CCs to be measured by the terminal device 110, perform at least one measurement on the second subset of CCs, and transmit, to the network device 120, a measurement report for the at least one measurement on the second subset of CCs.
[0099] In some embodiments, the second message further configures a timer indicating a time period during which the terminal device 110 is to perform the at least one measurement on the second subset of CCs.
[0100] In some embodiments, the terminal device 110 may further: based on determining that the timer expires, perform at least one measurement on the set of CCs configured to be measured.
[0101] In some embodiments, the terminal device 110 may further: perform at least one measurement on the set of CCs prior to receiving the second message.
[0102] In some embodiments, the terminal device 110 may further: transmit, to the network device 120, capability information indicating whether the terminal device 110 supports the determination of the first subset of CCs from the set of CCs.
[0103] In some embodiments, the terminal device 110 may further: receive, from the network device 120, a request message for requesting the terminal device 110 to determine the first subset of CCs from the set of CCs.
[0104] In some embodiments, the request message indicates a third subset of CCs of the set of CCs suggested by the network device 120 to be measured by the terminal device 110.
[0105] In some embodiments, the terminal device 110 may determine the first subset of CCs by: selecting the first subset of CCs from the third subset of CCs.
[0106] In some embodiments, the request message comprises a measurement threshold for determining the first subset of CCs.
[0107] In some embodiments, the first subset of CCs is determined based on at least one of the following: layer 3 (L3) or layer 1 (L1) measurements on the set of CCs, CSI measurements on the set of CCs, at least one difference between measurements on the set of CCs, at least one correlation between measurement samples of the set of CCs, or configuration information of the set of CCs.
[0108] In some embodiments, the terminal device 110 may further: perform at least one measurement on the set of CCs prior to determining the first subset of CCs, wherein the determining the first subset of CCs is based on the at least one measurement.
[0109] In some embodiments, the terminal device 110 may further: receive a message from the network device 120 configuring the set of CCs.
[0110] FIG. 7 illustrates a flowchart of a method 700 implemented at an apparatus according to some other embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the terminal device 110 with reference to FIG. 1. This apparatus may be implemented as the network device 120.
[0111] At block 710, the network device 120 may receive, from a terminal device 110, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device 110.
[0112] In some embodiments, the network device 120 may further: receive, from the terminal device 110, a measurement report for at least one measurement on the first subset of CCs, and apply the at least one measurement of the first subset of CCs to at least one other CC among the set of CCs.
[0113] In some embodiments, the network device 120 may further: determine, based on the first subset of CCs, a second subset of CCs of the set of CCs to be measured by the terminal device 110 and transmit, to the terminal device 110, a second message indicating the second subset of CCs.
[0114] In some embodiments, the network device 120 may further: receive, from the terminal device 110, a measurement report for at least one measurement on the second subset of CCs, and apply the at least one measurement of the second subset of CCs to at least one other CC among the set of CCs.
[0115] In some embodiments, the second subset of CCs is same as or different from the first subset of CCs.
[0116] In some embodiments, the second message further configures a timer indicating a time period for performing the at least one measurement on the second subset of CCs.
[0117] In some embodiments, the network device 120 may further: receive, from the terminal device 110, capability information indicating whether the terminal device 110 supports the determination of the first subset of CCs from the set of CCs.
[0118] In some embodiments, the network device 120 may further: transmit, to the terminal device 110, a request message for requesting the terminal device 110 to determine the first subset of CCs from the set of CCs.
[0119] In some embodiments, the request message indicates a third subset of CCs of the set of CCs suggested by the network device 120 to be measured by the terminal device 110.
[0120] In some embodiments, the first subset of CCs is from the third subset of CCs.
[0121] In some embodiments, the request message comprises a measurement threshold for determining the first subset of CCs.
[0122] In some embodiments, the network device 120 may further: transmit a message to the terminal device 110 configuring the set of CCs.
[0123] In some embodiments, an apparatus capable of performing any of the method 600 (for example, the terminal device 110) may comprise means for performing the respective steps of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0124] In some embodiments, the apparatus comprises means for determining, from a set of CCs configured to be measured by the terminal device 110, a first subset of CCs to measure. The apparatus comprises means for transmitting, to a network device 120, a first message indicating the first subset of CCs.
[0125] In some embodiments, the apparatus may further comprise: means for performing at least one measurement on the first subset of CCs, and means for transmitting, to the network device 120, a measurement report for the at least one measurement on the first subset of CCs.
[0126] In some embodiments, the apparatus may further comprise: means for receiving, from the network device 120, a second message indicating a second subset of CCs of the set of CCs to be measured by the terminal device 110, means for performing at least one measurement on the second subset of CCs, and means for transmitting, to the network device 120, a measurement report for the at least one measurement on the second subset of CCs.
[0127] In some embodiments, the second message further configures a timer indicating a time period during which the terminal device 110 is to perform the at least one measurement on the second subset of CCs.
[0128] In some embodiments, the apparatus may further comprise: means for based on determining that the timer expires, performing at least one measurement on the set of CCs configured to be measured.
[0129] In some embodiments, the apparatus may further comprise: means for performing at least one measurement on the set of CCs prior to receiving the second message.
[0130] In some embodiments, the apparatus may further comprise: means for transmitting, to the network device 120, capability information indicating whether the terminal device 110 supports the determination of the first subset of CCs from the set of CCs.
[0131] In some embodiments, the apparatus may further comprise: means for receiving, from the network device 120, a request message for requesting the terminal device 110 to determine the first subset of CCs from the set of CCs.
[0132] In some embodiments, the request message indicates a third subset of CCs of the set of CCs suggested by the network device 120 to be measured by the terminal device 110.
[0133] In some embodiments, the means for determining the first subset of CCs may comprise means for selecting the first subset of CCs from the third subset of CCs.
[0134] In some embodiments, the request message comprises a measurement threshold for determining the first subset of CCs.
[0135] In some embodiments, the first subset of CCs is determined based on at least one of the following: layer 3 (L3) or layer 1 (L1) measurements on the set of CCs, CSI measurements on the set of CCs, at least one difference between measurements on the set of CCs, at least one correlation between measurement samples of the set of CCs, or configuration information of the set of CCs.
[0136] In some embodiments, the apparatus may further comprise: means for performing at least one measurement on the set of CCs prior to determining the first subset of CCs, wherein the determining the first subset of CCs is based on the at least one measurement.
[0137] In some embodiments, the apparatus may further comprise: means for receiving a message from the network device 120 configuring the set of CCs.
[0138] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 600. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0139] In some embodiments, an apparatus capable of performing any of the method 700 (for example, the network device 120) may comprise means for performing the respective steps of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0140] In some embodiments, the apparatus comprises means for receiving, from a terminal device 110, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device 110.
[0141] In some embodiments, the apparatus may comprise: means for receiving, from the terminal device 110, a measurement report for at least one measurement on the first subset of CCs and means for applying the at least one measurement of the first subset of CCs to at least one other CC among the set of CCs.
[0142] In some embodiments, the apparatus may comprise: means for determining, based on the first subset of CCs, a second subset of CCs of the set of CCs to be measured by the terminal device 110 and means for transmitting, to the terminal device 110, a second message indicating the second subset of CCs.
[0143] In some embodiments, the apparatus may comprise: means for receiving, from the terminal device 110, a measurement report for at least one measurement on the second subset of CCs and means for applying the at least one measurement of the second subset of CCs to at least one other CC among the set of CCs.
[0144] In some embodiments, the second subset of CCs is same as or different from the first subset of CCs.
[0145] In some embodiments, the second message further configures a timer indicating a time period for performing the at least one measurement on the second subset of CCs.
[0146] In some embodiments, the apparatus may comprise: means for receiving, from the terminal device 110, capability information indicating whether the terminal device 110 supports the determination of the first subset of CCs from the set of CCs.
[0147] In some embodiments, the apparatus may comprise: means for transmitting, to the terminal device 110, a request message for requesting the terminal device 110 to determine the first subset of CCs from the set of CCs.
[0148] In some embodiments, the request message indicates a third subset of CCs of the set of CCs suggested by the network device 120 to be measured by the terminal device 110.
[0149] In some embodiments, the first subset of CCs is from the third subset of CCs.
[0150] In some embodiments, the request message comprises a measurement threshold for determining the first subset of CCs.
[0151] In some embodiments, the apparatus may comprise: means for transmitting a message to the terminal device 110 configuring the set of CCs.
[0152] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 700. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0153] FIG. 8 is a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure. The device 800 may be provided to implement the communication device, for example the terminal device 110, the network device 120 as shown in FIG. 1. As shown, the device 800 includes one or more processors 810, one or more memories 820 coupled to the processor 810, and one or more communication modules 840 coupled to the processor 810.
[0154] The communication module 840 is for bidirectional communications. The communication module 840 has at least one antenna to facilitate communication. The communication interface may represent any interface that is necessary for communication with other network elements.
[0155] The processor 810 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0156] The memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 824, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random access memory (RAM) 822 and other volatile memories that will not last in the power-down duration.
[0157] A computer program 830 includes computer executable instructions that are executed by the associated processor 810. The program 830 may be stored in the ROM 824. The processor 810 may perform any suitable actions and processing by loading the program 830 into the RAM 822.
[0158] The embodiments of the present disclosure may be implemented by means of the program 830 so that the device 800 may perform any process of the disclosure as discussed with reference to FIGS. 2 to 5. The embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0159] In some embodiments, the program 830 may be tangibly contained in a computer readable medium which may be included in the device 800 (such as in the memory 820) or other storage devices that are accessible by the device 800. The device 800 may load the program 830 from the computer readable medium to the RAM 822 for execution. The computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
[0160] FIG. 9 shows an example of the computer readable medium 900 in form of CD or DVD. The computer readable medium has the program 930 stored thereon.
[0161] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0162] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 600-700 as described above with reference to FIG. 6 or 7. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0163] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0164] In the context of the present disclosure, the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0165] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0166] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0167] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.An apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:determine, from a set of component carriers (CCs) configured to be measured by the apparatus, a first subset of CCs to measure; andtransmit, to a network device, a first message indicating the first subset of CCs.2.The apparatus of claim 1, wherein the apparatus is further caused to:perform at least one measurement on the first subset of CCs; andtransmit, to the network device, a measurement report for the at least one measurement on the first subset of CCs.3.The apparatus of claim 1, wherein the apparatus is further caused to:receive, from the network device, a second message indicating a second subset of CCs of the set of CCs to be measured by the apparatus;perform at least one measurement on the second subset of CCs; andtransmit, to the network device, a measurement report for the at least one measurement on the second subset of CCs.4.The apparatus of claim 3, wherein the second message further configures a timer indicating a time period during which the apparatus is to perform the at least one measurement on the second subset of CCs.5.The apparatus of claim 4, wherein the apparatus is further caused to:based on determining that the timer expires, perform at least one measurement on the set of CCs configured to be measured.6.The apparatus of any of claims 3-5, wherein the apparatus is further caused to:perform at least one measurement on the set of CCs prior to receiving the second message.7.The apparatus of any of claims 1-6, wherein the apparatus is further caused to:transmit, to the network device, capability information indicating whether the apparatus supports the determination of the first subset of CCs from the set of CCs.8.The apparatus of any of claims 1-7, wherein the apparatus is further caused to:receive, from the network device, a request message for requesting the apparatus to determine the first subset of CCs from the set of CCs.9.The apparatus of claim 8, wherein the request message indicates a third subset of CCs of the set of CCs suggested by the network device to be measured by the apparatus.10.The apparatus of claim 9, wherein apparatus is caused to determine the first subset of CCs by:selecting the first subset of CCs from the third subset of CCs.11.The apparatus of any of claims 8-10, wherein the request message comprises a measurement threshold for determining the first subset of CCs.12.The apparatus of any of claims 1-11, wherein the first subset of CCs is determined based on at least one of the following:layer 3 (L3) or layer 1 (L1) measurements on the set of CCs,CSI measurements on the set of CCs,at least one difference between measurements on the set of CCs,at least one correlation between measurement samples of the set of CCs, orconfiguration information of the set of CCs.13.The apparatus of any of claims1-12, wherein the apparatus is further caused to:perform at least one measurement on the set of CCs prior to determining the first subset of CCs, wherein the determining the first subset of CCs is based on the at least one measurement.14.The apparatus of any of claims1-13, wherein the apparatus is further caused to:receive a message from the network device configuring the set of CCs.15.An apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:receive, from a terminal device, a first message indicating a first subset of component carriers (CCs) of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.16.The apparatus of claim 15, wherein the apparatus is further caused to:receive, from the terminal device, a measurement report for at least one measurement on the first subset of CCs; andapply the at least one measurement of the first subset of CCs to at least one other CC among the set of CCs.17.The apparatus of claim 15, wherein the apparatus is further caused to:determine, based on the first subset of CCs, a second subset of CCs of the set of CCs to be measured by the terminal device; andtransmit, to the terminal device, a second message indicating the second subset of CCs.18.The apparatus of claim 17, wherein the apparatus is further caused to:receive, from the terminal device, a measurement report for at least one measurement on the second subset of CCs; andapply the at least one measurement of the second subset of CCs to at least one other CC among the set of CCs.19.The apparatus of claim 17 or 18, wherein the second subset of CCs is same as or different from the first subset of CCs.20.The apparatus of any of claims 17-19, wherein the second message further configures a timer indicating a time period for performing the at least one measurement on the second subset of CCs.21.The apparatus of any of claims 15-20, wherein the apparatus is further caused to:receive, from the terminal device, capability information indicating whether the terminal device supports the determination of the first subset of CCs from the set of CCs.22.The apparatus of any of claims 15-21, wherein the apparatus is further caused to:transmit, to the terminal device, a request message for requesting the terminal device to determine the first subset of CCs from the set of CCs.23.The apparatus of claim 22, wherein the request message indicates a third subset of CCs of the set of CCs suggested by the apparatus to be measured by the terminal device.24.The apparatus of claim 23, wherein the first subset of CCs is from the third subset of CCs.25.The apparatus of any of claims 15-24, wherein the request message comprises a measurement threshold for determining the first subset of CCs.26.The apparatus of any of claims 15-25, wherein the apparatus is further caused to:transmit a message to the terminal device configuring the set of CCs.27.A method comprising:determining, from a set of CCs configured to be measured by an apparatus, a first subset of CCs to measure; andtransmitting, to a network device, a first message indicating the first subset of CCs.28.A method comprising:receiving, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.29.An apparatus comprising:means for determining, from a set of CCs configured to be measured by the apparatus, a first subset of CCs to measure; andmeans for transmitting, to a network device, a first message indicating the first subset of CCs.30.An apparatus comprising:means for receiving, from a terminal device, a first message indicating a first subset of CCs of a set of CCs determined by the terminal device to measure, wherein the set of CCs is configured to be measured by the terminal device.31.A computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least the method of claim 27 or 28.