Network energy saving operaton
By introducing a deep power saving state for cells not transmitting SSB signals, the patent addresses undefined UE behaviors, enhancing network energy efficiency through reduced power consumption and defined UE operations.
Patent Information
- Application Number
- PCT/CN2024/110237
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2026-02-12
AI Technical Summary
Existing wireless communication technologies lack clear guidelines for user equipment (UE) behavior when a cell is configured but does not transmit periodic or on-demand synchronization signals, leading to undefined UE and network behaviors and increased power consumption.
Introduce a deep power saving state where the UE skips serving cell detection, new cell detection, and synchronization signal measurements on cells not transmitting periodic or on-demand SSB signals, with configurations provided by network indications.
Defines clear UE behaviors, reducing power consumption by minimizing unnecessary measurements and detections, thereby optimizing network energy efficiency.
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Figure CN2024110237_12022026_PF_FP_ABST
Abstract
Description
NETWORK ENERGY SAVING OPERATON
[0001] FIELDS
[0002] Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for network energy saving operation.BACKGROUND
[0003] Power saving is important for both the user equipment (UE) and the network (NW) in the wireless communication. To enable further power saving in the wireless communication, on-demand Synchronization Signal Block (OD-SSB) operation for network energy saving (NES) cell has been proposed. Specifically, NES cell operating with OD-SSB mode may not periodically broadcast the SSB. Instead, the SSB of the NES cell may be provided on-demand, i.e., based on network indication or a request from user equipment (UE) .SUMMARY
[0004] In a first aspect of the present disclosure, there is provided a first apparatus (210 700) . The first apparatus includes at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus (210, 700) at least to: receive (420-2, 510) , from a second apparatus (220-1, 700) , at least one configuration including an identity of a first cell (202-1) serving the first apparatus (210, 700) ; and skip (440, 520) , based on the at least one configuration, at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0005] In a second aspect of the present disclosure, there is provided a second apparatus (220-1 700) . The second apparatus includes at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus (220-1, 700) at least to: transmit (420-1, 610) , to a first apparatus (220-1, 700) , at least one configuration including: an identity of a first cell (202-1) serving for the first apparatus (210, 700) and an indication that the first cell (202-1) is configured in a deep power saving state, wherein based on the indication, the first apparatus (220-1, 700) skips at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202- 1) frequency, performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0006] In a third aspect of the present disclosure, there is provided a method. The method includes: receiving (420-2, 510) , from a second apparatus (220-1, 700) , at least one configuration including an identity of a first cell (202-1) serving the first apparatus (210, 700) ; and skipping (440, 520) , based on the at least one configuration, at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) frequency, performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0007] In a fourth aspect of the present disclosure, there is provided a method. The method includes: transmitting (420-1, 610) , to a first apparatus (220-1, 700) , at least one configuration including: an identity of a first cell (202-1) serving for the first apparatus (210, 700) and an indication that the first cell (202-1) is configured in a deep power saving state, wherein based on the indication, the first apparatus (220-1, 700) skips at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0008] In a fifth aspect of the present disclosure, there is provided a first apparatus (210 700) . The first apparatus includes means for receiving (420-2, 510) , from a second apparatus (220-1, 700) , at least one configuration including an identity of a first cell (202-1) serving the first apparatus (210, 700) ; and means for skipping (440, 520) , based on the at least one configuration, at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0009] In a sixth aspect of the present disclosure, there is provided a second apparatus (220-1 700) . The second apparatus includes means for transmitting (420-1, 610) , to a first apparatus (220-1, 700) , at least one configuration including: an identity of a first cell (202- 1) serving for the first apparatus (210, 700) and an indication that the first cell (202-1) is configured in a deep power saving state, wherein based on the indication, the first apparatus (220-1, 700) skips at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0010] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium includes instructions stored thereon for causing an apparatus to perform at least the method according to the third aspect.
[0011] In an eighth aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium includes instructions stored thereon for causing an apparatus to perform at least the method according to the fourth aspect.
[0012] 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 may become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Some example embodiments are described with reference to the accompanying drawings, where:
[0014] FIG. 1 illustrates an example diagram of difference cases of SSB transmission;
[0015] FIG. 2 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0016] FIG. 3A and FIG. 3B illustrate example diagrams of different cell states in accordance with some embodiments of the present disclosure;
[0017] FIG. 4 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure;
[0018] FIG. 5 illustrates a flowchart of a method implemented at a second apparatus according to some example embodiments of the present disclosure;
[0019] FIG. 6 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure;
[0020] FIG. 7 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure; and
[0021] FIG. 8 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0022] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0023] Principle of the present disclosure is 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. Embodiments described herein may be implemented in various manners other than the ones described below.
[0024] 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.
[0025] 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.
[0026] It shall be understood that although the terms “first, ” “second” and the like 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.
[0027] 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.
[0028] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.
[0029] The terminology used herein is for the purpose of 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 may be further understood that the terms “includes” , “including” , “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.
[0030] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0031] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0032] (b) combinations of hardware circuits and software, such as (as applicable) :
[0033] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0034] (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
[0035] (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.
[0036] 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.
[0037] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as New Radio (NR) , 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 fifth generation (5G) communication protocols, 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 may 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.
[0038] As used herein, the term “network device” refers 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) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture includes a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node includes a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.
[0039] 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 (loT) 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. The terminal device may also correspond to a Mobile Termination (MT) part of an IAB node (e.g., a relay node) . In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0040] As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block” (PRB) , “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
[0041] As discussed above, power saving is important for both the UE and the network in the wireless communication. To enable further power saving in the wireless communication, OD-SSB operation for NES cell has been proposed.
[0042] It has been agreed that the medium access control (MAC) control element (CE) based signaling has been agreed as one of the signalings to indicate on-demand synchronization signal and physical broadcast channel (PBCH) block (SSB) transmission on the secondary cell (SCell) . Specifically, for a cell supporting on-demand SSB SCell operation, support radio resource control (RRC) based signaling to indicate on-demand SSB transmission on the cell and support MAC CE based signaling to indicate on-demand SSB transmission on the cell.
[0043] In addition, downlink control information (DCI) based signaling (including UE-specific or group-common DCI) to indicate on-demand SSB transmission on the cell may be supported. Further, whether such DCI signaling may provide SCell activation / deactivation may be further discussed.
[0044] Furthermore, related to the MAC CE signaling design for on-demand SSB transmission, below options may be considered: Option-1: Introducing a brand-new MAC CE for on-demand SSB transmission; Option-2: Extending of existing MAC CE of SCell Activation / Deactivation for the purpose of on-demand SSB transmission; Option-3: Re-use the existing MAC CE of SCell activation / deactivation for the purpose of on-demand SSB transmission.
[0045] For Option-3, a new UE behavior may be expected (i.e., UE expected monitoring / reception of on-demand SSB signal) after receiving of MAC CE of SCell activation / deactivation command, e.g. based on the prior on-demand SSB configuration.
[0046] Based on the current understanding, the difference between a brand-new MAC CE and existing MAC CE is just the matter of whether the new (extended) logical channel identification (enhanced) logical channel identity, (e) LCID, is introduced or not. From UE behavior point of view, for the new release 19 network energy saving (NES) UEs, it may be easier to interpret the on-demand SSB transmission / reception based on the brand-new MAC CE with a new (e) LCID. For utilizing of existing MAC CE, the release 19 NES UEs may re-interpret the legacy MAC CE (s) of SCell activation / deactivation for the new purpose of on-demand SSB transmission, i.e., based on the prior configuration information.
[0047] So far, it is un-clear how to indicate on-demand SSB transmission, for example, how does the NW indicate the configuration of on-demand SSB, how does the NW indicate the activation or start of on-demand SSB transmission, or how does the NW indicate the configuration and activation of on-demand SSB transmission. Technically, the following options may be considered: Option-A: NW indicates to activate the on-demand SSB transmission with the MAC CE signaling, where the configuration of on-demand SSB transmission was provided prior to the UE, e.g., via the RRC of SCell configuration signaling, or other RRC configuration; Option-B: NW indicates the configuration of on-demand SSB transmission as well as to activate the on-demand SSB transmission with the same MAC CE signaling. The MAC CE signaling is expected to provide flexibility to the above on-demand SSB transmission mode for the activated SCell.
[0048] According to current discussions and agreements, the UE may be configured with a deactivated SCell without SSB. Reference is now made to FIG. 1, which illustrates an example diagram 100 of difference cases of SSB transmission. As illustrated in FIG. 1, below periodic SSB may be transmitted:
[0049] -Periodic SSB as assumed broadcasted by cells in legacy, also referred to as always-on SSBs, such as, Case 3 and Case 4 as illustrated in FIG. 1.
[0050] -Periodic OD-SSB broadcasted after initiated explicitly by network (for example by OD-SSB indication signal, such as Case 1 in FIG. 1) or implicitly (for example by SCell configuration or SCell activation) (such as Cases 2 to 4 in FIG. 1) .
[0051] -Periodic OD-SSB may be transmitted for shorter or longer period of time. For example, for a fixed amount of SSB transmissions (such as Case 1) or while the SCell is configured or activated (such as Case 2) .
[0052] Currently, there are clear UE requirements for a deactivated SCell which is regarded as a serving cell (i.e., a configured SCell which may be in activated, deactivated or dormant state) . For example, it has defined cell detection and measurement delay requirements for a deactivated SCell. Refer to below tables, where new radio (NR) frequency range 1 (FR1) is used as an illustrative and non-limiting example.
[0053] Table 1 Time period for PSS / SSS detection, deactivated SCell (FR1)
[0054] Table 2 Measurement period for intra-frequency measurements without gaps (deactivated SCell) (FR1)
[0055] It may be seen that, once an SCell has been configured (and in this example in deactivated state) the UE may be able to identify a new detectable intra-frequency cell (on a serving SCell carrier) within the time period indicated in above Table 1 and Table 2. Table 1 indicates the time period for PSS / SSS detection. Similarly, the measurement period for intra-frequency measurements without gaps is as shown in above Table 2.
[0056] The SSB measurement timing configuration (SMTC) defines the parameter measCycleSCell, which is used only when an SCell is configured on the frequency indicated by the measObjectNR and is in deactivated state. gNB configures the parameter whenever an SCell is configured on the frequency indicated by the measObjectNR, but the field may also be signalled when an SCell is not configured. It may have value range of: sf160, sf256, sf320, sf512, sf640, sf1024, sf1280. Value sf160 corresponds to 160 sub-frames, value sf256 corresponds to 256 sub-frames and so on.
[0057] CSSFintra is a scaling factor applied if the UE has multiple SCell’s configured with measurements. Kp is a scaling factor due to potential overlap between the SMTC and measurement gaps.
[0058] Hence, if assuming no measurement gaps are configured (Kp = 1) and only one SCell is configured in FR1 carrier aggregation (CA) (CSSFintra = 1) , UE requirements may be as follows for non-DRX scenario:
[0059] x PSS / SSS detection: Ceil (5 x Kp) x measCycleSCell x CSSFintra = 5 x measCycleSCell = 800ms
[0060] x Measurement period: Ceil (5 x Kp) x measCycleSCell x CSSFintra = 5 x measCycleSCell = 800ms.
[0061] When assuming measCycleSCell = 160ms. Currently each SCell configuration also includes at least one SMTC configuration. Hence, include at least smtc1, Primary measurement timing configuration.
[0062] The UE may setup the first SMTC in accordance with the received periodicityAndOffset parameter (providing Periodicity and Offset value for the following condition) in the smtc1 configuration.
[0063] On the indicated ssbFrequency, the UE may not consider synchronization signal / physical broadcast channel (SS / PBCH) block transmission in subframes outside the SMTC occasion for radio resource management (RRM) measurements based on SS / PBCH blocks and for RRM measurements based on channel state information (CSI) -reference signal (RS) except for SFTD measurement.
[0064] Based on above it is clear that for the SCell, the UE is configured with the necessary information for performing the required measurements according to the defined minimum UE requirements.
[0065] Hence, there are well defined UE requirements covering the current SCell configuration scenarios including deactivated SCell, activated SCell and dormant SCell. In all scenarios the SCell is a serving cell and it is expected that the UE may follow the UE minimum requirements as stated above. Note: that the UE measurement requirements for an activated as well as dormant SCell follows the defined measurement requirements for a serving cell.
[0066] However, for the scenario, where an SCell may be configured and there is a period of time where the SCell is not transmitting any SSB, e.g. before any on-demand SSB is triggered / activated as illustrated in Case 1 and Case 2 in FIG. 1, the UE requirements are undefined. It should be noted that the above scenarios is one illustrative scenario. There are likely other scenarios which may face similar discussion like for example SSB-less SCells.
[0067] In summary, for the scenario, where a cell (such as, SCell) is not transmitting any SSB (or at least assumed not transmitting any SSB) , UE behaviors need to be specified.
[0068] As used herein, the term “SSB-based measurement “may be any measurement utilizing SSB signals, including but not limited to, quality measurement, cell measurement, beam measurement, interference measurement and so on.
[0069] In the context of the present discourse, an SSB-related scenario (such as, no SSB transmission, SSB-based measurement and so on) will be used as an example of application scenario for describing some specific example embodiments of the present disclosure. It is noted that example embodiments described with regard to the SSB-related scenario are equally applicable to other scenarios of synchronization and measurement signals. In other words, the term SSB may be replaced with any suitable synchronization and measurement signals. Merely for brevity, the same or similar contents are omitted here.
[0070] Example Environment
[0071] FIG. 2 shows an example communication environment 200 in which example embodiments of the present disclosure may be implemented. The network communication 200 includes a first apparatus 210, a second apparatus 220-1 and optional second apparatuses 220-2. In the following text, the second apparatuses 220-1 and 220-2 are collectively referred to as the second apparatuses 220 or individually referred to as the second apparatus 220. Additionally, the second apparatuses 220 may provide one or more coverage areas, also called as cells.
[0072] The first apparatus 210 may be located in multiple cells. In the example of FIG. 2, the first apparatus 210 is located in first cell 202-1, second cell 202-2 and third cell 202-3. As one example use case, the first cell 202-1 is a SCell, the second cell 202-1 is a neighbour cell and the third cell is a PCell.
[0073] In some cases, to ensure the continuity of communication or enhance the performance of communication, the first apparatus 210 needs to perform a serving cell detection to find new available serving cell, or perform a new cell detection to find any new cell. Further, the serving cell detection and the new cell detection may be performed by SSB-based measurement. In communication environment 200, merely for a specific example embodiment, when performing the serving cell detection and the new cell detection, any cell around the first apparatus 210 may be found as a new serving cell or a new cell.
[0074] In some embodiments, different cells may be provided by different second apparatus 220. Alternatively, in some embodiments, a same second apparatus 220 may provide more than one cell. For example, in some embodiments, the first cell 202-1 and the third cell 202-3 may be provided by the second apparatus 220-1. In some other embodiments, the first cell 202-1 and the third cell 202-3 may be provided by the second apparatus 220-1 and the second apparatus 220-2, respectively.
[0075] In some example embodiments, the first apparatus 210 may be included in a terminal device / apparatus and the second apparatus 220 may be included in a network device / apparatus serving the terminal device / apparatus.
[0076] In the following, for the purpose of illustration, some example embodiments are described with the first apparatus 210 operating as a terminal apparatus and the second apparatus 220 operating as a network apparatus. However, in some example embodiments, operations described in connection with a terminal apparatus may be implemented at a network apparatus or other apparatus, and operations described in connection with a network apparatus may be implemented at a terminal apparatus or other apparatus.
[0077] In some example embodiments, if the first apparatus 210 is a terminal apparatus and the second apparatus 220 is a network apparatus, a link from the second apparatus 220 to the first apparatus 210 is referred to as a downlink (DL) , while a link from the first apparatus 210 to the second apparatus 220 is referred to as an uplink (UL) . In DL, the second apparatus 220 is a transmitting (TX) apparatus (or a transmitter) and the first apparatus 210 is a receiving (RX) apparatus (or a receiver) . In UL, the first apparatus 210 is a TX apparatus (or a transmitter) and the second apparatus 220 is a RX apparatus (or a receiver) .
[0078] It is to be understood that the number of devices and their connections shown in FIG. 2 are only for the purpose of illustration without suggesting any limitation. The communication environment 200 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell, and one or more additional cells may be deployed in the communication environment 200. It is noted that although illustrated as a network device, the second apparatus 220 may be another device than a network device. Although illustrated as a terminal device, the first apparatus 210 may be another device than a terminal device.
[0079] Communications in the communication environment 200 may be implemented according to any proper communication protocol (s) , including, 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) , 5.5G, the sixth generation (6G) , and 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, including 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.
[0080] Work Principle and Example Signaling for Communication
[0081] As discussed above, it is expected to define proper UE requirements related to UE behavior when being configured with an SCell which is activated or deactivated but does not transmit, such as, periodic SSB (or not transmit synchronization and / or measurement / reference signals) with regard to the UE, because if no clear UE behavior description, UE / NW behavior becomes undefined and unclear. According to some example embodiments of the present disclosure, new UE / NW behaviors may be defined if a cell is assumed not transmitting periodic or on-demand SSB signals.
[0082] Additionally, a new cell state (which may be call as a deep power saving state or sleeping state for illustration) may be introduced in addition to the existing SCell states: activated, deactivated and dormant. One example embodiment is illustrated in FIG. 3A which illustrates an example diagram 300A of different cell states in accordance with some embodiments of the present disclosure. FIG. 3A illustrates three states, i.e., activated state, a deactivated state and a sleeping state (i.e., the deep power saving state which is newly-defined) . Further, dormant state is implemented as a substate of the activated state. In the sleeping cell state, the UE is not required to perform any serving cell detection, any new cell detection and not required to perform periodic SSB-based RRM measurements on either the SCell or any detected neighbor cell on the SCell carrier.
[0083] Alternatively, the sleeping state may be one sub-state within the activated, deactivated or dormant state. One example embodiment is illustrated in FIG. 3B, which illustrates two states, i.e., activated state and a deactivated state, where the sleeping state (i.e., the deep power saving state) is implemented as a substate of the activated state and / or the deactivated state. Further, in the example of FIG. 3B, the dormant state is implemented as a substate of the activated state. In this event, the sleeping state also may be implemented as a substate of the dormant state. In the sleeping cell state, the UE is not required to perform any serving cell detection, any new cell detection and not required to perform periodic SSB-based RRM measurements on either the SCell or any detected neighbor cell on the SCell carrier.
[0084] In should be understood that in other embodiments, the deep power saving state may be called as another name and may has other relationship with other existing and future defined states. The present disclosure targets to define the new UE behaviors under a specific state, not targets to define the name and the relationship among the specific state and other existing and future defined states.
[0085] Alternatively, in some example embodiments, the UE requirements may reflect the UE requirements applicability with regard to cell which do not transmit continuous periodic SSB.
[0086] Alternatively, in some example embodiments, when the SCell does not support SSB before the SCell has been activated (and / or OD-SSB potentially has been transmitted) , the SCell may be expected to be configured in the activated state. As an example embodiment, a cell which does not transmit SSB periodically and / or continuously, but only once activated (for a given UE) , such SCell must be configured in activated state.
[0087] Alternatively, in some example embodiments, it may consider sleeping state SCell activation non feasible and there are no requirements at all, which requires NW to activate SSB before activating Scell.
[0088] Alternatively, in some example embodiments, it may consider sleeping state SCell activation non feasible unless under limited conditions, e.g., consider collocated scenario and / or configure reference SCell that has sufficient reference symbols (e.g., SSBs) for measurements.
[0089] More details may be discussed with reference to FIG. 4, which illustrates a signaling flow 400 of communication in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 400 is discussed with reference to FIG. 2. Further, in some example embodiments, a terminal apparatus may be used as an example of the first apparatus 210 and a network apparatus may be used as an example of the second apparatus 220-1.
[0090] As illustrated in FIG. 4, the second apparatus 220-1 transmits (420-1) at least one configuration to the first apparatus 210 and the first apparatus 210 receives (420-2) the at least one configuration accordingly, where the at least one configuration indicates an identity of a first cell 202-1 serving the first apparatus 210. In some example embodiments, the first cell 202-1 may be a secondary cell (SCell) or a primary secondary cell (PSCell) . It is noted that the at least one configuration may comprise one or more configurations which may be transmitted in a single message or more than one message. Further, such message (s) may be transmitted in different example embodiments if needed.
[0091] In some example embodiments, the at least one configuration may include at least one of the following: an RRC signalling, a MAC CE or a DCI. In some example embodiments, the at least one configuration may include a message used for adding the first cell 202-1 into carrier aggregation (CA) operation, such as, an RRCReconfiguration for adding the first cell 202-1 into the CA operation.
[0092] Based on the at least one configuration, the first apparatus 210 skips (440) one or more operations based on the at least one configuration as discussed below. In some cases, the first apparatus 210 may skip (442) performing a cell detection on a frequency of the first cell 202-1, including any of a serving cell detection and a new cell detection. Alternatively, or additionally, in some cases, the first apparatus 210 may skip (444) performing a first SSB-based measurement on the first cell 202-1 and / or a second SSB-based measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell 202-1. Alternatively, or additionally, in some cases, the first apparatus 210 may skip (446) applying a first SSB-based measurement requirement on the first cell 202-1 or on the frequency which is the same as that of the first cell 202-1.
[0093] In this way, new UE behaviors (i.e., the skipping operation) may be well defined and the power consumption may be saved accordingly.
[0094] According to some example embodiments, the new UE behaviors may be performed under a specific condition. In some example embodiments, the first apparatus 210 may perform the new UE behaviors if the first apparatus 210 is not configured with an SSB configuration. Alternatively, or in addition, in another example embodiments, the first apparatus 210 may perform the new UE behaviors if the first apparatus 210 is not configured with the first SSB-based measurement e.g., SMTC.
[0095] Alternatively, or in addition, in one example embodiments, the first apparatus 210 may perform the new UE behaviors if the first cell 202-1 is assumed not transmitting periodic or on-demand SSB signals. Specifically, based on current configurations, the first apparatus 210 may assume there is no SSB transmission on the first cell 202-1 regardless of whether there is an actual SSB transmission on the first cell (202-2) .
[0096] In some example embodiments, the first apparatus 210 may assume that no SSB signals are being transmitted on the first cell 202-1 based on receiving an indication that the first cell 202-1 is configured with a deep power saving state as discussed above. Alternatively, in some embodiments, the first apparatus 210 may assume that no SSB signals are transmitted on the first cell 202-1 based on determining that the first cell 202-1 is not configured with a periodic or on-demand SSB transmission. Alternatively, in some example embodiments, the first apparatus 210 may assume that no SSB signals are transmitted on the first cell 202-1 based on determining that the first cell 202-1 is configured with on-demand SSB transmission and the on-demand SSB transmission is not triggered / activated. Alternatively, in some embodiments, the first apparatus 210 may assume that no SSB signals are transmitted on the first cell 202-1 based on determining that the first cell 202-1 is not configured with an SSB measurement timing configuration (SMTC) .
[0097] In some example embodiments, the new UE behaviors may be associated with the deep power saving state. Specifically, the first apparatus 210 may perform the new UE behaviors if the first apparatus 210 determines that the first cell 202-1 is operated in a deep power saving state.
[0098] In some embodiments, the first apparatus 210 may determine the first cell 202-1 is in the deep power saving state in response to at least one of the following assuming that no SSB signals are transmitted on the first cell 202-1, receiving an indication that the first cell 202-1 is configured with a deep power saving state, determining that the first cell 202-1 is not configured with a periodic or on-demand SSB transmission, determining that the first cell 202-1 is configured with on-demand SSB transmission and the on-demand SSB transmission is not triggered / activated, or determining that the first cell 202-1 is not configured with an SSB measurement timing configuration (SMTC) .
[0099] In some example embodiments, the first SSB-based measurement requirement may be not applied if the first cell 202-1 is in the deep power saving state or if there is no SSB transmission.
[0100] In some example embodiments, the deep power saving state may be one of a plurality of states at least including at least one of the following: an activated state, a deactivated state, or a dormant state, as illustrated in FIG. 3A.
[0101] In some example embodiments, the deep power saving state may be a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state, as illustrated in FIG. 3B.
[0102] In some example embodiments, first apparatus 210 may determine that the first cell 202-1 exits from the deep power saving state based on that a periodic or an on-demand SSB transmission is initiated on the first cell 202-1. Accordingly, the second apparatus 220-1 may cause the first cell 202-1 to exit the power saving state based on that a periodic or on-demand SSB transmission is initiated on the first cell 202-1.
[0103] In some example embodiments, first apparatus 210 may determine that the first cell 202-1 transitions to the deep power saving state based on that no SSB signals are transmitted on the first cell 202-1. Accordingly, the second apparatus 220-1 may cause the first cell 202-1 to transition to the deep power saving state based on that no SSB signals are transmission on the first cell 202-1.
[0104] In some example embodiments, if no SSB transmission is configured on a frequency layer associated with the first cell 202-1, first apparatus 210 may skip (440) on the frequency layer, one or more measurements including: a reference signal received power (RSRP) measurement, a reference signal receiving quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR) measurement, or a received signal strength indication (RSSI) measurement. Accordingly, the second apparatus 220-1 may not configure the one or more measurements on the frequency layer.
[0105] In some example embodiments, if the first cell 202-1 does not support transmitting SSB signals before being activated, the first apparatus 210 may expect the first cell 202-1 to be configured in an activated state. Accordingly, if that the first cell 202-1 does not support transmitting SSB signals before being activated, the second apparatus 210 may always configure the first cell 202-1 in an activated state.
[0106] In some example embodiments, if a cell is one that does not transmit SSB signals periodically and continuously, but only upon activation (for a specific UE) , then the SCell is expected to be configured to be in an activated state. Consequently, it may not be configured to the UE in a deactivated state, which ensures that the NW behavior is invisible to the UE.
[0107] In some example embodiments, the second apparatus 210 may transmit (420-1) a first configuration of the at least one configuration from the second apparatus 220-1 to the first apparatus 210 and the first apparatus 210 may receive (420-2) a first configuration of the at least one configuration from the second apparatus 220-1, where the first configuration indicates an SSB transmission is configured on the first cell 202-1. Then the second apparatus 210 may transmit (420-1) a second configuration of the at least one configuration to the first apparatus (210, 700) , and the first apparatus is (210) may receive (420-2) a second configuration of the at least one configuration from the second apparatus 220-1 for activating the first cell 202-1.
[0108] Further example embodiments are discussed for illustrative purposes and should not be construed as a limitation of the present disclosure. It should be noted that SCell is only used for illustrative purposes. In fact, below embodiments may be used also for other scenarios, such as, a PCell / PSCell without periodic SSB for example before the PCell / PSCell is activated.
[0109] In some example embodiments, the sleeping state may be applicable for a configured SCell. An SCell in sleeping state may transition to deactivated or activated or dormant state. An SCell in sleeping state may be assumed not transmitting continuous periodic SSB. If an SCell in sleeping SCell state initiates transmission of periodic SSB, the SCell may be no longer considered as being in sleeping SCell state but may be either activated, deactivated or dormant SCell state.
[0110] In an example, the NW may transmit an RRCReconfiguration message with a SCellstate IE “sleeping” to indicate that the SCell in the sleeping state is added.
[0111] In another example, if the UE receives neither SSB configuration nor SMTC configuration for the SCell, or the UE receives an indication that there is no regular or always-on / periodic SSBs on the SCell, the SCell may be considered as in sleeping state as a default.
[0112] In some example embodiments, an SCell in the sleeping state may be an SCell on which the UE is configured not to perform SSB-based measurements.
[0113] In some example embodiments, applicable SSB-based measurement requirements may be do not applied for an SCell in sleeping state unless.
[0114] Following are some other examples how to define the UE measurement requirements for a configured serving cell for example in sleeping state when this cell is not transmitting SSB for example before the cell is activated.
[0115] In some example embodiments, the measurement requirements defined for intra-frequency measurements (applicable to serving cells (and carriers with a serving cell) ) , are not applied for a configured serving cell (and carrier) activated or deactivated -which do not transmit periodic SSB. Besides not transmitting periodic SSB it could also be applicable for a serving cell for which the UE is not configured to perform measurements.
[0116] In some example embodiments, the (SSB-based) measurement requirements do not apply to a configured SCell / PSCell on which no periodic SSB is transmitted unless specifically defined and / or the (SSB-based) measurement requirements do not apply to a configured SCell for which the UE is not configured to perform measurements.
[0117] In some example embodiments, the intra-frequency requirements concerning number of cells and number SSBs that the UE is capable of performing SS-RSRP, SS-RSRQ, and SS-SINR measurements on, may be not applied for a configured serving cell (and carrier) activated or deactivated -which do not transmit periodic SSB. Besides not transmitting periodic SSB it could also be applicable for a serving cell for which the UE is not configured to perform measurements.
[0118] In some example embodiments, as for requirements for FR1, for each intra-frequency layer, which transmit periodic SSB, during each layer 1 measurement period, the UE may be capable of performing synchronization signal (SS) -RSRP, SS-RSRQ, and SS-SINR measurements for at least: 8 identified cells, and 14 SSBs with different SSB index and / or PCI on the intra-frequency layer, where the number of SSBs in the serving cell (except for the SCell) is not smaller than the number of configured radio link monitoring (RLM) -RS SSB resources.
[0119] In some example embodiments, as for requirements for FR2, for one single intra-frequency layer in a band, during each layer 1 measurement period, the UE may be capable of performing SS-RSRP, SS-RSRQ, and SS-SINR measurements for at least: 6 identified cells, and 24 SSBs with different SSB index and / or PCI, where this single intra-frequency layer may be: the intra-frequency layer transmits periodic SSB, and primary component carrier (PCC) when UE is configured with SA NR operation mode with PCC in the band; or primary secondary component carrier (PSCC) when UE is configured with Evolved Universal Terrestrial Radio Access New Radio (EUTRA-NR) Dual Connection (EN-DC) with PSCC in the band; or PSCC when UE is configured with NR-NR Dual Connectivity (NR-DC) with PSCC in the band; or one of the SCCs on which UE is configured to report SSB-based measurements when neither PCC nor PSCC is in the same band, so that the selected SCC may be an SCC where the UE is configured with SS-RSRP measurement reporting if such SCC exists, otherwise the selected SCC is determined by UE implementation.
[0120] In some example embodiments, the UE may also be capable of performing SS-RSRP, SS-RSRQ, and SS-SINR measurements for at least 2 SSBs on serving cell for each of the other intra-frequency layer (s) in the same band on which periodic SSB is transmitted.
[0121] Example Method
[0122] FIG. 5 shows a flowchart of an example method 500 implemented at a first apparatus (210) in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 500 is described from the perspective of the first apparatus (210) in FIG. 2 and with reference to FIG. 4.
[0123] At block 510, the first apparatus (210) receives (420-2, 510) , from a second apparatus (220-1) , at least one configuration including an identity of a first cell (202-1) serving the first apparatus (210) .
[0124] At block 520, the first apparatus (210) skips (440, 520) , based on the at least one configuration, at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0125] In some example embodiments, the skipping may be performed based on at least one of the following: the first cell (202-1) being assumed not transmitting periodic or on-demand synchronization signal signals, the first apparatus (210) being not configured with a synchronization signal configuration, or the first apparatus (210) being not configured with the first synchronization signal measurement.
[0126] In some example embodiments, the at least one configuration may include a message used for adding the first cell (202-1) into carrier aggregation (CA) operation.
[0127] In some example embodiments, in accordance with a determination that the first cell (202-1) is operated in a deep power saving state, the first apparatus (210) may perform the skipping.
[0128] In some example embodiments, the first apparatus (210) may assume that no synchronization signals are transmitted on the first cell (202-1) based on at least one of the following: receiving an indication that the first cell (202-1) is configured with a deep power saving state, determining that the first cell (202-1) is not configured with a periodic or on-demand synchronization signal transmission, determining that the first cell (202-1) is configured with an on-demand synchronization signal transmission and the on-demand synchronization signal transmission is not activated, or determining that the first cell (202-1) is not configured with an SSB measurement timing configuration (SMTC) .
[0129] In some example embodiments, the deep power saving state may be one of a plurality of states at least including at least one of the following: an activated state, a deactivated state, or a dormant state, or the deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.
[0130] In some example embodiments, the first apparatus (210) may determine that the first cell (202-1) exits from the deep power saving state is based on a periodic or an on-demand SSB transmission is initiated on the first cell (202-1) ; and / or determine that the first cell (202-1) transitions to the deep power saving state is based on that no synchronization signals are transmitted on the first cell (202-1) .
[0131] In some example embodiments, in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell (202-1) , the first apparatus (210) may skip (440) , on the frequency layer, one or a combination of measurements including: a signal received power (RSRP) measurement, a signal receiving quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR) measurement, or a received signal strength indication (RSSI) measurement.
[0132] In some example embodiments, based on that the first cell (202-1) does not support transmitting synchronization signals before being activated, the first apparatus (210) may expect the first cell (202-1) to be configured in an activated state.
[0133] In some example embodiments, the first apparatus (210) may receive (420-2) a first configuration of the at least one configuration from the second apparatus (220-1) , the first configuration indicating a synchronization signal transmission is configured on the first cell (202-1) ; and receive (420-2) a second configuration of the at least one configuration from the second apparatus (220-1) for activating the first cell (202-1) .
[0134] In some example embodiments, the first synchronization signal measurement requirement may be not applied if the first cell (202-1) is in a deep power saving state or if there is no synchronization signal transmission.
[0135] In some example embodiments, the first cell (202-1) may be a secondary cell (SCell) or a primary secondary cell (PSCell) , and the first apparatus (210) may include a terminal apparatus and the second apparatus (220-1) may include a network apparatus.
[0136] In some example embodiments, the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.
[0137] In some example embodiments, the at least one configuration includes at least one of the following: a radio resource control (RRC) signalling, a medium access control (MAC) control element (CE) , or downlink control information (DCI) .
[0138] FIG. 6 shows a flowchart of an example method 600 implemented at a second apparatus (220-1) in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 600 is described from the perspective of the second apparatus 220 in FIG. 2 and with reference to FIG. 4.
[0139] At block 610, the second apparatus (220-1) transmits (420-1, 610) , to a first apparatus (220-1) , at least one configuration including: an identity of a first cell (202-1) serving for the first apparatus (210) and an indication that the first cell (202-1) is configured in a deep power saving state, wherein based on the indication, the first apparatus (220-1) skips at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0140] In some example embodiments, the at least one configuration may include a message used for adding the first cell (202-1) into carrier aggregation (CA) operation.
[0141] In some example embodiments, the deep power saving state may be one of a plurality of states at least including at least one of the following: an activated state, a deactivated state, or a dormant state, or the deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.
[0142] In some example embodiments, based on that a periodic or on-demand synchronization signal transmission is initiated on the first cell (202-1) , the second apparatus (220-1) may cause the first cell (202-1) to exit the power saving state; and / or based on that no synchronization signals are transmission on the first cell (202-1) , the second apparatus (220-1) may cause the first cell (202-1) to transition to the deep power saving state.
[0143] In some example embodiments, in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell (202-1) , the second apparatus (220-1) may be expected not to configure on the frequency layer, one or a combination of measurements including at least one of the following: a signal received power (RSRP) measurement, a signal receiving quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR) measurement, or a received signal strength indication (RSSI) measurement.
[0144] In some example embodiments, based on that the first cell (202-1) does not support transmitting synchronization signals before being activated, the second apparatus (220-1) may configure the first cell (202-1) in an activated state.
[0145] In some example embodiments, the second apparatus (220-1) may transmit (420-1) a first configuration of the at least one configuration from the second apparatus (220-1) , the first configuration indicating a synchronization signal transmission is configured on the first cell (202-1) ; and may transmit (420-1) a second configuration of the at least one configuration to the first apparatus (210) , the second configuration used for activating the first cell (202-1) .
[0146] In some example embodiments, the first synchronization signal measurement requirement may be not applied if the first cell (202-1) is in a deep power saving state or if there is no synchronization signal transmission.
[0147] In some example embodiments, the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.
[0148] In some example embodiments, the at least one configuration may be included in at least one of the following: a radio resource control (RRC) signalling, a medium access control (MAC) control element (CE) , or downlink control information (DCI) .
[0149] In some example embodiments, the first apparatus (210) may include a terminal apparatus and the second apparatus (220-1) may include a network apparatus.
[0150] Example Apparatus, Device and Medium
[0151] In some example embodiments, a first apparatus (210) capable of performing any of the method 500 (for example, the first apparatus 210 in FIG. 2 may include performing the respective operations of the method 500. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The first apparatus may be implemented as or included in the first apparatus 210 in FIG. 2.
[0152] In some example embodiments, the first apparatus includes means for receiving (420-2, 510) , from a second apparatus (220-1) , at least one configuration including an identity of a first cell (202-1) serving the first apparatus (210) ; and means for skipping (440, 520) , based on the at least one configuration, at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0153] In some example embodiments, the skipping is performed based on at least one of the following: the first cell (202-1) being assumed not transmitting periodic or on-demand synchronization signal signals, the first apparatus (210) being not configured with a synchronization signal configuration, determining that the first cell (202-1) is configured with an on-demand synchronization signal transmission and the on-demand synchronization signal transmission is not activated, or the first apparatus (210) being not configured with the first synchronization signal measurement.
[0154] In some example embodiments, the at least one configuration includes a message used for adding the first cell (202-1) into carrier aggregation (CA) operation.
[0155] In some example embodiments, the first apparatus (210) is caused to: means for, performing the skipping in accordance with a determination that the first cell (202-1) is operated in a deep power saving state.
[0156] In some example embodiments, the first apparatus (210) may further include: means for assuming that no synchronization signals are transmitted on the first cell (202-1) based on at least one of the following: receiving an indication that the first cell (202-1) is configured with a deep power saving state, determining that the first cell (202-1) is not configured with a periodic or on-demand synchronization signal transmission, or determining that the first cell (202-1) is not configured with an SSB measurement timing configuration (SMTC) .
[0157] In some example embodiments, the deep power saving state may be one of a plurality of states at least including at least one of the following: an activated state, a deactivated state, or a dormant state, or the deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.
[0158] In some example embodiments, the first apparatus (210) may further include: means for determining that the first cell (202-1) exits from the deep power saving state is based on a periodic or an on-demand SSB transmission is initiated on the first cell (202-1) ;and / or means for determining that the first cell (202-1) transitions to the deep power saving state is based on that no synchronization signals are transmitted on the first cell (202-1) .
[0159] In some example embodiments, the first apparatus (210) may further include: means for in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell (202-1) , skipping (440) , on the frequency layer, one or a combination of measurements including: a signal received power (RSRP) measurement, a signal receiving quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR) measurement, or a received signal strength indication (RSSI) measurement.
[0160] In some example embodiments, the first apparatus (210) may further include: means for expecting the first cell (202-1) to be configured in an activated state based on that the first cell (202-1) does not support transmitting synchronization signals before being activated.
[0161] In some example embodiments, the first apparatus is (210) caused to: receive (420-2) a first configuration of the at least one configuration from the second apparatus (220-1) , the first configuration indicating a synchronization signal transmission is configured on the first cell (202-1) ; and receive (420-2) a second configuration of the at least one configuration from the second apparatus (220-1) for activating the first cell (202-1) .
[0162] In some example embodiments, the first synchronization signal measurement requirement is not applied if the first cell (202-1) is in a deep power saving state or if there is no synchronization signal transmission.
[0163] In some example embodiments, the first cell (202-1) is a secondary cell (SCell) or a primary secondary cell (PSCell) , and wherein the first apparatus (210) includes a terminal apparatus and the second apparatus (220-1) includes a network apparatus.
[0164] In some example embodiments, the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.
[0165] In some example embodiments, the at least one configuration includes at least one of the following: a radio resource control (RRC) signalling, a medium access control (MAC) control element (CE) , or downlink control information (DCI) .
[0166] In some example embodiments, a second apparatus (220-1) capable of performing any of the method 600 (for example, the second apparatus 220-1 in FIG. 2) may include performing the respective operations 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. The second apparatus may be implemented as or included in the second apparatus 210 in FIG. 2.
[0167] In some example embodiments, the second apparatus (220-1) includes means for transmitting (420-1, 610) , to a first apparatus (220-1) , at least one configuration including: an identity of a first cell (202-1) serving for the first apparatus (210) and an indication that the first cell (202-1) is configured in a deep power saving state, wherein based on the indication, the first apparatus (220-1) skips at least one of the following: performing a serving cell detection on a frequency of the first cell (202-1) , performing a new cell detection on a frequency of the first cell (202-1) , performing a first synchronization signal measurement on the first cell (202-1) , performing a second synchronization signal measurement on a second cell (202-2) operated on a frequency which is the same as that of the first cell (202-1) , or applying a first synchronization signal measurement requirement on the first cell (202-1) .
[0168] In some example embodiments, the at least one configuration may include a message used for adding the first cell (202-1) into carrier aggregation (CA) operation.
[0169] In some example embodiments, the deep power saving state may be one of a plurality of states at least including at least one of the following: an activated state, a deactivated state, or a dormant state, or the deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.
[0170] In some example embodiments, the second apparatus (220) may further include: causing the first cell (202-1) to exit the power saving state based on that a periodic or on-demand synchronization signal transmission is initiated on the first cell (202-1) ; and / or means for causing the first cell (202-1) to transition to the deep power saving state based on that no synchronization signals are transmission on the first cell (202-1) .
[0171] In some example embodiments, the second apparatus (220) may further include: means for in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell (202-1) , being expected not to configuring on the frequency layer, one or a combination of measurements including at least one of the following: a signal received power (RSRP) measurement, a signal receiving quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR) measurement, or a received signal strength indication (RSSI) measurement.
[0172] In some example embodiments, the second apparatus (220) may further include: means for configuring the first cell (202-1) in an activated state based on that the first cell (202-1) does not support transmitting synchronization signals before being activated.
[0173] In some example embodiments, the second apparatus (220) may further include means for transmitting (420-1) a first configuration of the at least one configuration from the second apparatus (220-1) , the first configuration indicating a synchronization signal transmission is configured on the first cell (202-1) ; and means for transmitting (420-1) a second configuration of the at least one configuration to the first apparatus (210) , the second configuration used for activating the first cell (202-1) .
[0174] In some example embodiments, the first synchronization signal measurement requirement may be not applied if the first cell (202-1) is in a deep power saving state or if there is no synchronization signal transmission.
[0175] In some example embodiments, the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.
[0176] In some example embodiments, the at least one configuration is included in at least one of the following: a radio resource control (RRC) signalling, a medium access control (MAC) control element (CE) , or downlink control information (DCI) .
[0177] In some example embodiments, the first apparatus (210) includes a terminal apparatus and the second apparatus (220-1) includes a network apparatus.
[0178] FIG. 7 is a simplified block diagram of a device 700 that is suitable for implementing example embodiments of the present disclosure. The device 700 may be provided to implement a communication device, for example, the first apparatus 210 or the second device 220 as shown in FIG. 2. As shown, the device 700 includes one or more processors 710, one or more memories 720 coupled to the processor 710, and one or more communication modules 740 coupled to the processor 710.
[0179] The communication module 740 is for bidirectional communications. The communication module 740 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interfaces may represent any interface that is necessary for communication with other network elements. In some example embodiments, the communication module 740 may include at least one antenna.
[0180] The processor 710 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 700 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.
[0181] The memory 720 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) 724, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , an optical disk, a laser disk, and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 722 and other volatile memories that may not last in the power-down duration.
[0182] A computer program 730 includes computer executable instructions that are executed by the associated processor 710. The instructions of the program 730 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 730 may be stored in the memory, e.g., the ROM 724. The processor 710 may perform any suitable actions and processing by loading the program 730 into the RAM 722.
[0183] The example embodiments of the present disclosure may be implemented by means of the program 730 so that the device 700 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 6. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0184] In some example embodiments, the program 730 may be tangibly contained in a computer readable medium which may be included in the device 700 (such as in the memory 720) or other storage devices that are accessible by the device 700. The device 700 may load the program 730 from the computer readable medium to the RAM 722 for execution. In some example embodiments, the computer readable medium may include any types of non-transitory storage medium, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. 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) .
[0185] FIG. 8 shows an example of the computer readable medium 800 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 800 has the program 730 stored thereon.
[0186] 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, and other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. Although 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.
[0187] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer readable medium, such as a non-transitory computer readable medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target physical or virtual processor, to carry out any of the methods as described above. 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.
[0188] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. The program code 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 code, 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.
[0189] In the context of the present disclosure, the computer program code 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.
[0190] 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.
[0191] Further, although 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, although 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. Unless explicitly stated, certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated, various features that are described in the context of a single embodiment may also be implemented in a plurality of embodiments separately or in any suitable sub-combination.
[0192] 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.A first apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to:receive, from a second apparatus, at least one configuration comprising an identity of a first cell serving the first apparatus; andskip, based on the at least one configuration, at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.2.The first apparatus of claim 1, wherein the skipping is performed based on at least one of the following:determining that the first cell is configured with an on-demand synchronization signal transmission and the on-demand synchronization signal transmission is not activated,the first cell being assumed not transmitting periodic or on-demand synchronization signal signals,the first apparatus being not configured with a synchronization signal configuration, orthe first apparatus being not configured with the first synchronization signal measurement.3.The first apparatus of claim 1, wherein the at least one configuration comprises a message used for adding the first cell into carrier aggregation (CA) operation.4.The first apparatus of claim 1, wherein the first apparatus is caused to:in accordance with a determination that the first cell in operated is a deep power saving state, perform the skipping.5.The first apparatus of claim 1, wherein the first apparatus is caused to:assume that no synchronization signals are transmitted on the first cell based on at least one of the following:receiving an indication that the first cell is configured with a deep power saving state,determining that the first cell is not configured with a periodic or on-demand synchronization signal transmission,determining that the first cell is configured with an on-demand synchronization signal transmission and the on-demand synchronization signal transmission is not activated, ordetermining that the first cell is not configured with a synchronization signal and physical broadcast channel (PBCH) block (SSB) measurement timing configuration (SMTC) .6.The first apparatus of claim 4 or 5, wherein,the deep power saving state is one of a plurality of states at least comprising at least one of the following: an activated state, a deactivated state, or a dormant state, orthe deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.7.The first apparatus of claim 4 or 5, wherein the first apparatus is caused to:determine that the first cell exits from the deep power saving state is based on a periodic or an on-demand synchronization signal transmission is initiated on the first cell; and / ordetermine that the first cell transitions to the deep power saving state is based on that no synchronization signals are transmitted on the first cell.8.The first apparatus of any of claims 1 to 6, wherein the first apparatus is caused to:in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell, skip (440) , on the frequency layer, one or a combination of measurements comprising:a reference signal received power (RSRP) measurement,a reference signal receiving quality (RSRQ) measurement,a signal to interference plus noise ratio (SINR) measurement, ora received signal strength indication (RSSI) measurement.9.The first apparatus of any of claims 1 to 7, wherein the first apparatus is caused to:based on that the first cell does not support transmitting synchronization signals before being activated, expect the first cell to be configured in an activated state.10.The first apparatus of any of claims 1 to 8, wherein the first apparatus is caused to:receive a first configuration of the at least one configuration from the second apparatus, the first configuration indicating a synchronization signal transmission is configured on the first cell; andreceive a second configuration of the at least one configuration from the second apparatus for activating the first cell.11.The first apparatus of claims 1, wherein the first synchronization signal measurement requirement is not applied if the first cell is in a deep power saving state or if there is no synchronization signal transmission.12.The first apparatus of any of claims 1 to 11, wherein the first cell is a secondary cell (SCell) or a primary secondary cell (PSCell) , and wherein the first apparatus comprises a terminal apparatus and the second apparatus comprises a network apparatus.13.The first apparatus of any of claims 1 to 12, wherein the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.14.The first apparatus of any of claims 1 to 13, wherein the at least one configuration comprises at least one of the following:a radio resource control (RRC) signalling,a medium access control (MAC) control element (CE) , ordownlink control information (DCI) .15.A second apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus at least to:transmit, to a first apparatus, at least one configuration comprising: an identity of a first cell serving for the first apparatus and an indication that the first cell is configured in a deep power saving state, wherein based on the indication, the first apparatus skips at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.16.The second apparatus of claim 14, wherein the at least one configuration comprises a message used for adding the first cell into carrier aggregation (CA) operation.17.The second apparatus of claim 14 or 15, wherein,the deep power saving state is one of a plurality of states at least comprising at least one of the following: an activated state, a deactivated state, or a dormant state, orthe deep power saving state is a sub-state of at least one of the following: the activated state, the deactivated state, or the dormant state.18.The second apparatus of claim any of claims 14 to 16, wherein the second apparatus is caused to:based on that a periodic or on-demand synchronization signal transmission is initiated on the first cell, cause the first cell to exit the power saving state; and / orbased on that no synchronization signals are transmission on the first cell, cause the first cell to transition to the deep power saving state.19.The second apparatus of any of claims 14 to 17, wherein the second apparatus is caused to:in accordance with a determination that no synchronization signal transmission is configured on a frequency layer associated with the first cell, be expected not to configure, on the frequency layer, one or a combination of measurements comprising at least one of the following:a reference signal received power (RSRP) measurement,a reference signal receiving quality (RSRQ) measurement,a signal to interference plus noise ratio (SINR) measurement, ora received signal strength indication (RSSI) measurement.20.The second apparatus of any of claims 14 to 18, wherein the second apparatus is caused to:based on that the first cell does not support transmitting synchronization signals before being activated, configure the first cell in an activated state.21.The second apparatus of any of claims 14 to 19, wherein the second apparatus is caused to:transmit a first configuration of the at least one configuration from the second apparatus, the first configuration indicating a synchronization signal transmission is configured on the first cell; andtransmit a second configuration of the at least one configuration to the first apparatus, the second configuration used for activating the first cell.22.The second apparatus of any of claims 14 to 20, wherein the first synchronization signal measurement requirement is not applied if the first cell is in a deep power saving state or if there is no synchronization signal transmission.23.The second apparatus of any of claims 14 to 22, wherein the first and second synchronization signal measurement are synchronization signal and physical broadcast channel (PBCH) block (SSB) -based measurements, and the first synchronization signal measurement requirement is an SSB-based measurement requirement.24.The second apparatus of any of claims 14 to 21 wherein the at least one configuration is comprised in at least one of the following:a radio resource control (RRC) signalling,a medium access control (MAC) control element (CE) , ordownlink control information (DCI) .25.The second apparatus of any of claims 14 to 23, wherein the first apparatus comprises a terminal apparatus and the second apparatus comprises a network apparatus.26.A method comprising:receiving, from a second apparatus, at least one configuration comprising an identity of a first cell serving the first apparatus; andskipping, based on the at least one configuration, at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.27.A method comprising:transmitting, to a first apparatus, at least one configuration comprising: an identity of a first cell serving for the first apparatus and an indication that the first cell is configured in a deep power saving state, wherein based on the indication, the first apparatus skips at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.28.A first apparatus comprising:means for receiving, from a second apparatus, at least one configuration comprising an identity of a first cell serving the first apparatus; andmeans for skipping, based on the at least one configuration, at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.29.A second apparatus comprising:means for transmitting, to a first apparatus, at least one configuration comprising: an identity of a first cell serving for the first apparatus and an indication that the first cell is configured in a deep power saving state, wherein based on the indication, the first apparatus skips at least one of the following:performing a serving cell detection on a frequency of the first cell,performing a new cell detection on a frequency of the first cell,performing a first synchronization signal measurement on the first cell,performing a second synchronization signal measurement on a second cell operated on a frequency which is the same as that of the first cell, orapplying a first synchronization signal measurement requirement on the first cell.
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