Unified cell configuration for primary cell and secondary cell
The unified cell configuration for PCell and SCell addresses inefficiencies in existing technologies by using a single set of configurations for both, reducing storage and enabling efficient, quick cell changes.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NOKIA SOLUTIONS (SHANGHAI) CO LTD
- Filing Date
- 2024-12-20
- Publication Date
- 2026-06-25
AI Technical Summary
Existing technologies face inefficiencies in managing cell configurations for PCell and SCell changes due to separate configurations and storage overhead, leading to unnecessary RRC reconfigurations and reporting overhead during handovers.
A unified cell configuration approach is introduced, where a cell group configuration including generic cell configurations is transmitted, allowing for PCell and SCell changes using a single set of configurations, reducing storage needs and enabling quick fallbacks.
This solution minimizes unnecessary overhead and enables efficient, quick cell changes by allowing early parameter assignment and merging CA and mobility procedures, thus optimizing handover processes.
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Figure CN2024141224_25062026_PF_FP_ABST
Abstract
Description
UNIFIED CELL CONFIGURATION FOR PRIMARY CELL AND SECONDARY CELLFIELD
[0001] 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 unified cell configuration for primary cell (PCell) and secondary cell (SCell) .BACKGROUND
[0002] For the baseline Layer 3 (L3) Mobility, the radio resource control (RRC) Layer may control the user equipment (UE) mobility and the RRC parameters are re-configured at every change of PCell. Therefore, when the network indicates to the UE that it should perform baseline handover, the decision to do so comes from the RRC layer. When L1 / L2 triggered mobility (LTM) was introduced, support was added for a medium access control (MAC) layer to trigger the handover and meanwhile the configuration is still provided from the RRC layer.SUMMARY
[0003] In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:receive, from a second apparatus, a cell group configuration including a plurality of generic cell configurations; receive, from the second apparatus, an indication of a cell change of the first apparatus indicating a PCell change or a SCell activation and a cell identifier associated with the cell change; and perform an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.
[0004] In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: transmit, to a first apparatus, a cell group configuration including a plurality of generic cell configurations; and in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmit, to the first apparatus, an indication of the cell change indicating a PCell change or a SCell activation and a cell identifier of the generic cell.
[0005] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, from a second apparatus by a first apparatus, a cell group configuration including a plurality of generic cell configurations; receiving, from the second apparatus, an indication of a cell change of the first apparatus indicating a PCell change or a SCell activation and a cell identifier associated with the cell change; and performing an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.
[0006] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, from a second apparatus to a first apparatus, a cell group configuration including a plurality of generic cell configurations; and in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmitting to the first apparatus, an indication of the cell change indicating a PCell change or a SCell activation and a cell identifier of the generic cell.
[0007] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for receiving, from a second apparatus, a cell group configuration including a plurality of generic cell configurations; means for receiving, from the second apparatus, an indication of a cell change of the first apparatus indicating a PCell change or a SCell activation and a cell identifier associated with the cell change; and means for performing an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.
[0008] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for transmitting, to a first apparatus, a cell group configuration including a plurality of generic cell configurations; and means for in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmitting to the first apparatus, an indication of the cell change indicating a PCell change or a SCell activation and a cell identifier of the generic cell.
[0009] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the third aspect.
[0010] In an eighth aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the fourth aspect.
[0011] It is to be understood that the Summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Some example embodiments will now be described with reference to the accompanying drawings, where:
[0013] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0014] FIG. 2 illustrates the architecture with a single RRC;
[0015] FIG. 3 illustrates a signaling chart of communication according to some example embodiments of the present disclosure;
[0016] FIG. 4 illustrates a signaling chart of communication according to some example embodiments of the present disclosure;
[0017] FIG. 5 illustrates a signaling chart of communication according to some example embodiments of the present disclosure;
[0018] FIG. 6 illustrates a flowchart of a method implemented at a first apparatus in accordance with some example embodiments of the present disclosure;
[0019] FIG. 7 illustrates a flowchart of a method implemented at a second apparatus in accordance with some example embodiments of the present disclosure;
[0020] FIG. 8 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and
[0021] FIG. 9 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 will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can 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, ” …, etc. in front of noun (s) 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 and they do not limit the order of the noun (s) . 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 will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0030] As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable) : (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0031] 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.
[0032] 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) , 5.5G, the sixth generation (6G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0033] 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 comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises 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.
[0034] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. 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.
[0035] 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 combination of the time, frequency, space and / or code domain resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0036] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0037] FIG. 1 illustrates an example communication network 100 in which example embodiments of the present disclosure can be implemented. As shown in FIG. 1, the communication network 100 may comprise a first apparatus 110 which may also be, for example, referred to as a terminal device or a UE.
[0038] The communication network 100 may further comprise a second apparatus 120, which may be, for example, considered as being a network device or being included in a network device. In some example embodiments, the network device may be discussed as a BS, a gNB, or an eNB.
[0039] A serving area provided by the second apparatus 120 is called a cell. The first apparatus 110 may communicate with the second apparatus 120 within the cell 102. The cell currently serving the first apparatus 110 may be considered as a serving cell 102.
[0040] In the following, for the purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a terminal device and the second apparatus 120 operating as a network device. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0041] In some example embodiments, if the first apparatus 110 is a terminal device and second apparatus 120 is a network device, a link from the second apparatus 120 to first apparatus 110 is referred to as a downlink (DL) , while a link from the first apparatus 110 to second apparatus 120 is referred to as an UL. In DL, the second apparatus 120 is a transmitting (TX) apparatus (or a transmitter) and the first apparatus 110 is a receiving (RX) apparatus (or a receiver) . In UL, the first apparatus 110 is a TX apparatus (or a transmitter) and the second apparatus 120 is an RX apparatus (or a receiver) .
[0042] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 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 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the second apparatus 120 may be another device than a network device. Although illustrated as a terminal device, the first apparatus 110 may be another device than a terminal device.
[0043] In the following, for the purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a UE and the second apparatus 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0044] In some example embodiments, a transmission direction from the second apparatus 120 to the first apparatus 110 is referred to as a downlink (DL) , while a transmission direction from the first apparatus 110 to the second apparatus 120 is referred to as an uplink (UL) . In DL, the second apparatus 120 is a transmitting (TX) device (or a transmitter) and the first apparatus 110 is a receiving (RX) device (or a receiver) . In UL, the first apparatus 110 is a TX device (or a transmitter) and the second apparatus 120 is a RX device (or a receiver) .
[0045] Communications in the communication environment 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0046] The MAC mobility concept, called Cell at MAC (Cell@MAC) , that has been proposed in some discussed schemes, grants lower layers ( (physical) PHY and MAC) larger autonomy as shown in FIG. 2. In Cell at MAC, the entity cell under the same gNB, is in the scope of MAC layer and handover between cells is managed by MAC itself. Packet data convergence protocol (PDCP) and Radio Link Control (RLC) layers are not linked to a single cell and are not re-established during MAC layer handover. If the feature is deployed with Centralized Unit (CU) -Distributed Unit (DU) split, CU-DU signaling exchange could be reduced because RRC layer (located at the CU) would not be involved during the handover as it will be managed at the MAC (located at the DU) .
[0047] This architecture may achieve several benefits. First, hiding of mobility from higher layer (PDCP, RLC and even RRC) may be achieved. The re-establishment of a PDCP, RLC, and RRC layer is decoupled from handover. Secondly, a thin handover procedure may be achieved. Because the mobility is hidden from RRC, the parameter updates related to the handover should contain only MAC and PHY relevant parameters. These parameters can be pre-configured and / or organized in a channel specific manner. In the cell switch command, only the config-group ID and the config index will be sent from the lower layer to the UE. Third, a lean preparation may be achieved. By defining and managing intercell mobility at MAC, it frees the CU (or the RRC entity) from the preparation of candidates.
[0048] In addition, being autonomous in mobility decision at MAC level would indicate a higher requirement on the security of the MAC message.
[0049] Regarding the Carrier Aggregation (CA) utilized in 5G, the CA has been a widely deployed feature for LTE and NR. In CA, different carriers have the same RLC and PDCP layers.
[0050] In 5G, CA is used to achieve higher throughput for a UE. The carriers are always of different frequency. There is one PCell on the primary carrier and one or more SCell (s) on secondary carrier (s) . The primary carrier is the one used to establish connection to the network. The secondary carriers are present mainly to provide the UE with additional throughput. The secondary carriers can be added / removed or activated / deactivated without affecting the connectivity. However, if the link quality of the primary carrier is not good, change of connection results in handover with RRC re-establishment to a new cell. During handover, the MAC is reset with all the Hybrid Automatic Repeat Request (HARQ) buffer flushed.
[0051] PCells and SCells may be co-located, or non-colocated, which may have overlapping or non-overlapping coverage. The CA configuration of a UE is contained within the CellGroupConfig RRC configuration.
[0052] The CellGroupConfig Information Element (IE) is used to configure a master cell group (MCG) or secondary cell group (SCG) . A cell group comprises of one MAC entity, a set of logical channels with associated RLC entities and of a primary cell (SpCell) and one or more secondary cells (SCells) . For a Neighbour Cell Relation-Mobile Terminal (NCR-MT) , the CellGroupConfig IE is also used to provide the configuration of side control information for the Neighbour Cell Relation-Forward (NCR-Fwd) access link.
[0053] The information element of CellGroupConfig is shown below:
[0054] Within the cell group of a CA configuration, there is a SpCell, or PCell, which can be considered the anchor cell and configures for instance the Physical Downlink Control Channel (PDCCH) and Physical Uplink Control Channel (PUCCH) configurations, as well as Signaling Radio Bearer 1 (SRB1) . PDCCH and PUCCH can be also maintained by in SCells. The PCell configuration is contained in spCellConfig, whereas SCells are configured via sCellToAddModList.
[0055] When a UE is configured with an SCell which has a different coverage from the PCell, but both cells belong to the same gNB it may be beneficial to perform a role swap between the SCell and the PCell when the UE is moving more into the coverage of the SCell. This can be done with RRCReconfiguration.
[0056] In an RRC structure (e.g., shown in Table 1) , under cellGroupConfig, there are SpcellConfig, and ScellConfig. Even though, ScellConfig has the same template as SpcellConfig which are servingCellConfig, and servingCellConfigCommon, some fields that are not available to SCell will not be configured for SCell during RRCReconfiguration at the CA baseline procedure. In the concept of cell@MAC with CA framework, which means to bring mobility into CA, the mobility is about changing the PCell amid the SCell candidates. The current RRC structure defines PCell and SCell separately. This naturally leads to RRCReconfiguration which may bring the complete PCell configuration to UE though UE has partial SCell configuration already. In this situation, this RRCReconfiguration step may create unnecessary overhead.
[0057] Moreover, some discussed schemes have introduced the low layer trigger mobility procedure, that requires L1 measurements to be configured separately for this procedure. Similarly, also the candidate configurations are configured separately in a container.
[0058] If a cell is configured as an LTM candidate cell and an SCell, the similar configurations may need to be stored at two separate places at the UE side. This may be a storage problem. Similarly, the UE may report the same cell with SCell measurements and LTM reporting. This may be a reporting overhead problem.
[0059] In accordance with some example embodiments of the present disclosure, there is provided a solution for defining a unified cell configuration for PCell and SCell. In this solution, a cell group configuration including a plurality of generic cell configurations is transmitted from the second apparatus 120 (e.g., a network device) to the first apparatus 110 (e.g., a terminal device) . Upon receiving an indication of a cell change of the first apparatus 110 indicating a PCell change or a SCell activation and a cell identifier associated with the cell change from the second apparatus 120, the first apparatus 110, performs an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations. In this way, less storing at the UE side for the configuration, and a simplified cell change procedure can be achieved, and therefore a quick fall back can be provided by a general configuration (GcellConfig) for PCell and SCell.
[0060] The solution proposed in the present disclosure may be specified for mobility and has unified configurations which may be seen as the kernel.
[0061] This solution may help to eliminate the unnecessary overhead, by having unified servingCell configurations, regardless it is PCell or SCell. This allows early assignment of parameters. Therefore, no additional configuration is required at the time of PCell change amid candidate SCells. In addition, it aligns with the RRC kernel scheme that helps with a quick fall-back if there is any failure happening.
[0062] In this solution, a unified PCell and SCell configuration may be proposed and a new procedure where SCell management and MAC level mobility may be controlled by the same procedure. The objective is to provide support to eliminate the need for a must-have RRCReconfiguration, allowing early assignment of parameters. The solution may enable this via providing the necessary configurations to append SCell to be a PCell, such as, Physical Random Access Channel (PRACH) configuration for (Random Access Channel-based (RACH-based) cell change) , PUCCH and PDCCH configuration, cell change timers, (for example, T304) , radio link monitoring information.
[0063] This solution may also allow the merge of the procedure for CA and mobility using a general configuration at the UE side. In the following, how the signaling may enable both procedures using the same stored information at the UE side and how the RRC configuration may be modified to support the above feature will be further described in detail.
[0064] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0065] Reference is now made to FIG. 3, which shows a signaling chart 300 for communication according to some example embodiments of the present disclosure. As shown in FIG. 3, the signaling chart 300 involves a first apparatus 110 and a second apparatus 120. For the purpose of discussion, reference is made to FIG. 1 to describe the signaling chart 300.
[0066] The process shown in the FIG. 3 illustrates the general process of the solution proposed in the present disclosure where the measurement configuration is within the cellGroupConfig.
[0067] The first apparatus 110 may receive (305) , from a second apparatus 120, a cell group configuration including a plurality of generic cell configurations. In some example embodiments, the first apparatus 110 may receive the cell group configuration via an RRC message or a MAC message.
[0068] An example RRC structure for the cell group configuration (e.g. cellGroupConfig) described herein is listed below.
[0069] For example, a list of GcellConfigs may be defined under cellGroupConfig. The list of GcellConfigs listed herein may be referred to as the plurality of generic cell configurations and the cellGroupConfig listed herein may also be referred to as the cell group configuration mentioned above.
[0070] Furthermore, various instances of Radio Link Monitoring (RLM) and Radio Link Failure (RLF) related parameters and various instances of RRCreconfigWithSync may also be defined. The various instances of RLM and RLF related parameters and RRCReconfigWithSync are provided in advance, that allows dynamic activation or matching between active PCell parameters and configured parameters.
[0071] In some embodiments, in a default state, the plurality of generic cell configurations (e.g, a list of GcellConfigs) may be allowed to be used for PCell configurations. That is, under each generic cell configuration, all fields may be for the PCell.
[0072] An example of RRC structure for a generic cell configuration (e.g., GCellconfig) described herein is listed below.
[0073] As shown, there is an additional indicator (e.g., SecondaryCell) defined for a generic cell configuration (e.g., GCellconfig) , which may at least indicate whether this generic cell configuration is to be used as an SCell configuration.
[0074] As another example, this additional indicator mentioned above may also indicate whether the generic cell configuration is to be used for an activated SCell or a deactivated SCell or a PCell.
[0075] Therefore, under the example RRC structures listed above, by default, generic cells (GCells) that are not being used are configured with secondaryCell indicator not configured. That is under each GCell, all fields that are for the PCell are present, with an additional indicator “SecondaryCell” indicating if this GCell is a PCell, or activated SCell, or de-activated SCell.
[0076] When the “SecondaryCell” indicator is false, this GCell is a PCell, when the “SecondaryCell” indicator is true, this GCell is an activated SCell, when the “SecondaryCell” indicator is not configured, this is a de-activated SCell. In some embodiments this indicator can be dynamically and separately signaled to the UE to store this indication.
[0077] Alternatively, the indication is not limited to the above options. It will work as long as the indication supports three categories such as numeric indication.
[0078] Moreover, GcellConfigDedicated may provide cell level configuration. UE specific parameters are contained in RRCReconfigWithSync. Network may list such UE specific resources under various instances, and dynamically activate them during the cell switch process, or role swap process.
[0079] Then, upon receiving the plurality of generic cell configurations, the first apparatus 110 may respond (310) with a status acknowledgement (ACK) which may be a MAC response here for confirming the reception of the cell configuration. Additionally and optionally, this ACK may also inform the second apparatus 120 how many GCell configurations has the first apparatus 110 processed. The processed generic cell configuration (s) may indicate that the first apparatus 110 is ready to make measurements for those cells.
[0080] After transmitting the ACK to the second apparatus 120, the first apparatus 110 may perform (315) generic cell measurements on a radio link quality associated with the plurality of generic cells. For example, the first apparatus 110 may activate the corresponding generic cell measurements since the plurality of generic cells and at least one measurement configuration for generic cell measurements may be determined by the plurality of generic cells.
[0081] In some further embodiments, the first apparatus 110 may activate generic cell measurements that are not in measurement configuration of the second apparatus or not required by the second apparatus. This enables UE to have more flexibility on the measurement procedure.
[0082] Then the first apparatus 110 may transmit (320) a measurement report to the second apparatus 120. For example, the first apparatus 110 may report such measurement results that is not indicated in the NW request. Such measurement may also be referred to as generic cell measurement in the measurement report.
[0083] Along with the measurement report, the second apparatus 120 may also obtain a threshold associated with a radio link quality. Then the second apparatus 120 may determine (325) a generic cell to be used for the cell change based on the threshold.
[0084] For example, the DU of the second apparatus 120 may use the GCell measurement mentioned above to trigger SCell addition, de-activation, and PCell change. If the radio signal is above a threshold, and the first apparatus 110 may need an increased throughput, the second apparatus may trigger SCell activation (e.g., via MAC) .
[0085] Then the second apparatus 120 may transmit (330) , to the first apparatus 110, the indication of activating an SCell for the first apparatus and the cell identifier associated with the SCell activation, e.g., an cell identifier of the determined generic cell to be used. an additional indicator in this indication may also indicate the generic cell configuration corresponding to the cell identifier is to be used for an SCell configuration.
[0086] For example, the second apparatus 120 may activate SCell activation by providing GCell identifier (ID) , and setting the “SecondaryCell” indicator to true.
[0087] Upon receiving the indication and the cell identifier, the first apparatus 110 may select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier.
[0088] Then the first apparatus 110 may activate (335) the generic cell configured by the determined generic cell configuration as the SCell of the first apparatus 110. For example, the first apparatus 110 may use the GCell ID and configure the GCell as SCell.
[0089] In some cases, the second apparatus 120 may determine (340) a serving cell change (e.g., PCell) is to be performed at the first apparatus. The decision of PCell change may be based on the measurement report and available SCells. For example, the second apparatus 120 may decide to perform PCell change among the candidate GCells.
[0090] After the determination of the PCell change, the second apparatus 120 may transmit (345) , to the first apparatus 110, the indication of the PCell change for the first apparatus 110 and the cell identifier associated with the PCell change. In some embodiments, the indication further comprises an additional indicator indicating the generic cell configuration corresponding to the cell identifier is not allowed to be used for an SCell configuration.
[0091] For example, the second apparatus 120 may activate PCell activation by providing GCell ID and setting the secondaryCell indicator to false, and providing the corresponding RLM, RLF parameter and RRCReconfigurationWithSync configuration.
[0092] Then the first apparatus 110 may select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier that is to be used for this PCell change.
[0093] After the selection, the first apparatus 110 may activate (350) a generic cell configured by the determined generic cell configuration as the PCell of the first apparatus while discarding a further PCell serving the first apparatus 110 previously.
[0094] In some embodiments, a further generic cell configuration associated with this discarded PCell may be considered as being allowed to be used for a SCell configuration. For example, the second apparatus 120 may disable the previous PCell by setting the SecondaryCell indicator to true or not configured.
[0095] After activating the generic cell as the PCell, the first apparatus 110 may perform (355) an operation of cell change using the generic cell configuration associated with the cell identifier.
[0096] For example, the first apparatus 110 may use the cell identifier of generic cell and reconfigure with sync instance and RLM, RLF instance as PCell configuration. The first apparatus 110 may then perform the cell switch, and inform the second apparatus 120 that cell switch is complete (e.g., MAC) ) . The cell switch may be based on a RACH based process or a RACH-less process. Detailed description related to the RACH based process and the RACH-less process will be described with reference to FIG. 5.
[0097] Finally, the first apparatus 110 may transmit (360) to the second apparatus 120 an ACK of the cell change or the cell activation.
[0098] Reference is now made to FIG. 4, which shows a signaling chart 400 for communication according to some example embodiments of the present disclosure. As shown in FIG. 4, the signaling chart 400 involves a first apparatus 110 and a second apparatus 120. For the purpose of discussion, reference is made to FIG. 1 to describe the signaling chart 400.
[0099] The process shown in FIG. 4 illustrate the solution of the present disclosure with a measurement framework. The measurement configuration is separated from the cellGroupConfig.
[0100] The first apparatus 110 may receive (405) , from a second apparatus 120, a cell group configuration including a plurality of generic cell configurations. In some example embodiments, the first apparatus 110 may receive the cell group configuration via an RRC message or a MAC message.
[0101] Example RRC structures and IEs included in the cell group configuration and the generic cell configuration have been described with reference to FIG. 3, which will not be repeated here.
[0102] Different with the process described in FIG. 3, along with the cell group configuration, the first apparatus 110 may obtain generic cell measurements associated with the configured generic cells. For example, as part of generic cell configuration, generic cell measurement configuration (s) that may be indicated outside of generic cell configuration or as part of each generic cell configuration is indicated to the first apparatus. The generic cell measurement configured may consists of a resource set (resources for measurements) and a reporting configuration.
[0103] For example, the first apparatus 110 may use PCell uplink resources to report generic cell measurements.
[0104] The reporting configuration for each generic cell measurement may be placed in the dedicated generic cell configuration or in the serving cell configuration. For example, the report configuration may determine where the reports for the generic cells will be transmitted to, which will be described at action (420) later.
[0105] Then, upon receiving the plurality of generic cell configurations, the first apparatus 110 may respond (410) with a status acknowledgement (ACK) which may be a MAC response here for confirming the reception of the cell configuration. Additionally and optionally, this ACK may also inform the second apparatus 120 how many generic cell configurations has the first apparatus 110 processed.
[0106] Then, based on the plurality of generic cell configurations and generic cell measurement configuration (s) , the first apparatus 110 may perform (415) , the generic cell measurements on a radio link quality associated with the plurality of generic cells.
[0107] Then the first apparatus 110 may transmit (420) the measurement report to the second apparatus 120 based on the reporting configuration. As described, there is a reporting configuration in the generic cell configuration indicating to which NW node the measurement report will be transmitted.
[0108] In some embodiments, as an option, if the first apparatus 110 determines that a first generic cell in the plurality of generic cells is currently used or added as a PCell, the first apparatus 110 may transmit (420) , to the first generic cell, a measurement report of the generic cell measurements excluding measurements on at least one generic cell that is used as PCell or SCell.
[0109] Alternatively or optionally, if the first generic cell is added as a PCell, the first apparatus 110 may terminate reporting the generic cell measurements as the reporting for the new PCell will be taken up by the beam management framework.
[0110] In some embodiments, as another option if the first apparatus 110 determine that a second generic cell in the plurality of generic cells is currently used or added as a SCell, the first apparatus 110 may transmit a measurement report of the generic cell measurements to the second generic cell and / or a PCell currently serving the first apparatus.
[0111] For example, in case the network wants to maintain the view of reports in PCell, for the same measurement, a dedicated report may be still sent to PCell –this can be indicated with a separate flag to the first apparatus 110.
[0112] As still another option, for generic cells that are not used as SCell or PCell, the reports may be transmitted to the current PCell.
[0113] In a case wherein the second apparatus 120 determines (425) that an SCell activation is to be performed based on the measurement report, the second apparatus 120 may transmit (430) , the first apparatus 110 may receive (430) , from the second apparatus 120, the indication of activating an SCell for the first apparatus and the cell identifier associated with the SCell activation. The SecondaryCell indicator in this indication may be set to true, which may indicate the generic cell configuration is to be used for an SCell configuration.
[0114] Upon receiving the indication and the cell identifier, the first apparatus 110 may select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier and activate (435) a generic cell configured by the determined generic cell configuration as the SCell of the first apparatus. For example, the first apparatus 110 may configure the generic cell corresponding to the generic cell ID as SCell and start using the new SCell after the activation.
[0115] After activating this SCell, the first apparatus 110 may start using the reporting configuration provided in generic cell configuration and starts reporting the generic cell measurements to this SCell. For example, the first apparatus 110 may transmit (440) the measurement report to the second apparatus 120 managing the SCell.
[0116] Alternatively or in addition, the GCell measurements may be disabled after SCell activation / addition.
[0117] In another alternative, the first apparatus 110 may send the measurements to PCell of the first apparatus 110 using the uplink resource as PCell as the PCell may determine the cell change independently of SCell entity receiving the measurements.
[0118] If the second apparatus 120 determines (445) to perform a PCell change based on the measurement report and available SCells, the second apparatus 120 may transmit (450) to the first apparatus 110, the indication of the PCell change for the first apparatus 110 and the cell identifier associated with the PCell change.
[0119] For example, the second apparatus 120 may decide to perform PCell change among the candidate GCells and the PCell change may be triggered using the measurements received by SCell or PCell.
[0120] For example, the second apparatus 120 may activate PCell activation by proving GCell ID, and set the SecondaryCell indicator to false, and providing the corresponding RLM, RLF parameter and RRCReconfigurationWithSync instance number.
[0121] Then the first apparatus 110 may select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier and activate (455) a generic cell configured by the determined generic cell configuration as the PCell of the first apparatus while discarding a further PCell serving the first apparatus 110 previously.
[0122] After the PCell change, the reporting may be disabled for this PCell. For the rest of the generic cells, the first apparatus 110 may report (465) the measurement result to the new PCell, i.e., using the uplink resources of this PCell.
[0123] Other Details for SCell activation and / or PCell change are similar with the process described with reference to FIG. 3, which are omitted here.
[0124] Reference is now made to FIG. 5, which shows a signaling chart 500 for communication according to some example embodiments of the present disclosure. As shown in FIG. 5, the signaling chart 500 involves a first apparatus 110 and a second apparatus 120. For the purpose of discussion, reference is made to FIG. 1 to describe the signaling chart 500.
[0125] The process shown in FIG. 5 illustrate the solution of the present disclosure with a RACH-based process or a RACH-less process for the cell change.
[0126] Firstly, the first apparatus 110 may obtain (505) , along with the cell group configuration, a RACH configuration and a configured grant configuration for the cell change.
[0127] For example, the first apparatus 110 may be configured with RACH configuration dedicated and a configured grant configuration to be used in RACH-based and RACH-less access respectively.
[0128] The details of actions 510, 515 and 520 may be similar with actions 310, 315 and 320 described with reference to FIG. 3, which will be omitted here.
[0129] For a case wherein the second apparatus 120 may determine, based on the generic cell measurements, a generic cell is to be activated as SCell, the first apparatus 110 and the second apparatus 120 may perform (530) the timing advance (TA) acquisition.
[0130] Then the second apparatus 120 may indicate (535) the SCell activation by indicating the generic cell identifier and setting the SecondaryCell indicator to true.
[0131] Then the first apparatus 110 may configure (540) the generic cell as an SCell based on the received generic cell identifier.
[0132] The first apparatus 110 may also perform corresponding generic cell measurements for the generic cells and may transmit (545) the measurement report to the second apparatus 120.
[0133] If the second apparatus 120, based on the measurement report, determines (550) , the cell that is activated as SCell is to be used for a PCell change, i.e., the SCell is to be changed as being PCell, the second apparatus 120 may indicate (555) the PCell change to the first apparatus 110 by indicating the generic cell ID and a RACH-less indication, the first apparatus 110 may perform a RACH-less access procedure to the generic cell, that is is activated and used as a SCell, using the configured grant configuration. For example, the RACH-less indication may be included in the PCell change command.
[0134] That is, for the RACH-less process, the first apparatus 110 may use the TA of the SCell and execute RACH-less access to the generic cell, and the first apparatus 110 may also use the configured grant in generic cell configuration to send RRCReconfiguraiton complete.
[0135] For a case where the second apparatus 120 determines to activate a generic cell as PCell and the generic cell has not been added as a SCell, the first apparatus 110 may use the RACH-dedicated-configuration. For example, the RACH-based indication may be included in a PCell change command.
[0136] For the RACH-based process, as an example, the second apparatus 120 may indicate (570) PCell change directly to the first apparatus 110 by indicating the generic cell ID the RACH-config-dedicated in generic cell configuration is to be used to execute a RACH-based cell change.
[0137] If the first apparatus 110 determines that a RACH-based indication is received along with an indication of the PCell change to a generic cell, the first apparatus 110 may perform (575) a random access procedure to the generic cell using the random access configuration, e.g., RACH-dedicated configuration. After using the RACH-dedicated configuration, the first apparatus 110 has the PCell after the RACH-based access.
[0138] FIG. 6 shows a flowchart of an example method 600 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the first apparatus 110 in FIG. 1.
[0139] At block 610, the first apparatus 110 receives, from a second apparatus, a cell group configuration including a plurality of generic cell configurations.
[0140] At block 620, the first apparatus 110 receives, from the second apparatus, an indication of a cell change of the first apparatus indicating a PCell change or a SCell activation and a cell identifier associated with the cell change.
[0141] At block 630, a first apparatus 110 performs an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.
[0142] In some example embodiments, the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.
[0143] In some example embodiments, an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.
[0144] In some example embodiments, the method 600 further comprises: receiving the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.
[0145] In some example embodiments, the method 600 further comprises: receiving, from the second apparatus, the indication of activating an SCell for the first apparatus and the cell identifier associated with the SCell activation; selecting, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; and activating a generic cell configured by the determined generic cell configuration as the SCell of the first apparatus.
[0146] In some example embodiments, the indication further comprises an additional indicator indicating the generic cell configuration is to be used for an SCell configuration.
[0147] In some example embodiments, the method 600 further comprises: receiving, from the second apparatus, the indication of the PCell change for the first apparatus and the cell identifier associated with the PCell change; selecting, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; and activating a generic cell configured by the determined generic cell configuration as the PCell of the first apparatus while discarding a further PCell serving the first apparatus previously.
[0148] In some example embodiments, the indication further comprises an additional indicator indicating the generic cell configuration is not allowed to be used for an SCell configuration.
[0149] In some example embodiments, a further generic cell configuration associated with the disabled PCell is considered as being allowed to be used for a SCell configuration.
[0150] In some example embodiments, the method 600 further comprises: obtaining, along with the cell group configuration, at least one measurement configuration for generic cell measurements; determining a plurality of generic cells based on the cell group configuration; and performing, based on the at least one measurement configuration, the generic cell measurements on a radio link quality associated with the plurality of generic cells.
[0151] In some example embodiments, the method 600 further comprises: in accordance with a determination that a first generic cell in the plurality of generic cells is currently used as a PCell, transmitting, to the first generic cell, a measurement report of the generic cell measurements excluding measurements on at least one generic cell that is used as PCell or SCell, or terminating performing the generic cell measurements.
[0152] In some example embodiments, the method 600 further comprises: in accordance with a determination that a second generic cell in the plurality of generic cells is currently used as a SCell, transmitting a measurement report of the generic cell measurements to the second generic cell and / or a PCell currently serving the first apparatus.
[0153] In some example embodiments, the method 600 further comprises: obtaining, along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.
[0154] In some example embodiments, the method 600 further comprises: in accordance with a determination that a RACH-less indication is received along with an indication of the PCell change to a generic cell, performing a RACH-less access procedure to the generic cell using the configured grant configuration, wherein the generic cell is activated and used as a SCell.
[0155] In some example embodiments, the method 600 further comprises: in accordance with a determination that a RACH-based indication is received along with an indication of the PCell change to a generic cell, performing a random access procedure to the generic cell using the random access configuration.
[0156] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network node.
[0157] FIG. 7 shows a flowchart of an example method 700 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the second apparatus 120 in FIG. 1.
[0158] At block 710, a second apparatus 120 transmits, to a first apparatus, a cell group configuration including a plurality of generic cell configurations.
[0159] At block 720, in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, a second apparatus 120 transmits to the first apparatus, an indication of the cell change indicating a PCell change or a SCell activation and a cell identifier of the generic cell.
[0160] In some example embodiments, the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.
[0161] In some example embodiments, an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.
[0162] In some example embodiments, the method 700 further comprises: transmitting the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.
[0163] In some example embodiments, the method 700 further comprises: providing, to the first apparatus along with the cell group configuration, at least one measurement configuration for generic cell measurements, wherein the at least one measurement configuration comprises a reporting configuration indicating a destination of a measurement report of the generic cell measurements.
[0164] In some example embodiments, the method 700 further comprises: obtaining a threshold associated with a radio link quality along with the measurement report; and determining the generic cell to be used for the cell change based on the threshold.
[0165] In some example embodiments, the method 700 further comprises: providing, to the first apparatus along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.
[0166] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network node.
[0167] In some example embodiments, a first apparatus capable of performing any of the method 600 (for example, the first apparatus 110 in FIG. 1) may comprise means for 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 first apparatus may be implemented as or included in the first apparatus 110 in FIG. 1.
[0168] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, a cell group configuration including a plurality of generic cell configurations; means for receiving, from the second apparatus, an indication of a cell change of the first apparatus indicating a PCell change or a SCell activation and a cell identifier associated with the cell change; and means for performing an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.
[0169] In some example embodiments, the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.
[0170] In some example embodiments, an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.
[0171] In some example embodiments, the first apparatus further comprises: means for receiving the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.
[0172] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, the indication of activating an SCell for the first apparatus and the cell identifier associated with the SCell activation; means for selecting, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; and means for activating a generic cell configured by the determined generic cell configuration as the SCell of the first apparatus.
[0173] In some example embodiments, the indication further comprises an additional indicator indicating the generic cell configuration is to be used for an SCell configuration.
[0174] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, the indication of the PCell change for the first apparatus and the cell identifier associated with the PCell change; means for selecting, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; and means for activating a generic cell configured by the determined generic cell configuration as the PCell of the first apparatus while discarding a further PCell serving the first apparatus previously.
[0175] In some example embodiments, the indication further comprises an additional indicator indicating the generic cell configuration is not allowed to be used for an SCell configuration.
[0176] In some example embodiments, a further generic cell configuration associated with the disabled PCell is considered as being allowed to be used for a SCell configuration.
[0177] In some example embodiments, the first apparatus further comprises: means for obtaining, along with the cell group configuration, at least one measurement configuration for generic cell measurements; means for determining a plurality of generic cells based on the cell group configuration; and means for performing, based on the at least one measurement configuration, the generic cell measurements on a radio link quality associated with the plurality of generic cells.
[0178] In some example embodiments, the first apparatus further comprises: in accordance with a determination that a first generic cell in the plurality of generic cells is currently used as a PCell, means for transmitting, to the first generic cell, a measurement report of the generic cell measurements excluding measurements on at least one generic cell that is used as PCell or SCell, or means for terminating performing the generic cell measurements.
[0179] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that a second generic cell in the plurality of generic cells is currently used as a SCell, transmitting a measurement report of the generic cell measurements to the second generic cell and / or a PCell currently serving the first apparatus.
[0180] In some example embodiments, the first apparatus further comprises: means for obtaining, along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.
[0181] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that a RACH-less indication is received along with an indication of the PCell change to a generic cell, performing a RACH-less access procedure to the generic cell using the configured grant configuration, wherein the generic cell is activated and used as a SCell.
[0182] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that a RACH-based indication is received along with an indication of the PCell change to a generic cell, performing a random access procedure to the generic cell using the random access configuration.
[0183] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network node.
[0184] In some example embodiments, a second apparatus capable of performing any of the method 700 (for example, the second apparatus 120 in FIG. 1) may comprise means for performing the respective operations of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The second apparatus may be implemented as or included in the second apparatus 120 in FIG. 1.
[0185] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, a cell group configuration including a plurality of generic cell configurations; and means for in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmitting to the first apparatus, an indication of the cell change indicating a PCell change or a SCell activation and a cell identifier of the generic cell.
[0186] In some example embodiments, the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.
[0187] In some example embodiments, an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.
[0188] In some example embodiments, the second apparatus further comprises: means for transmitting the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.
[0189] In some example embodiments, the second apparatus further comprises: means for providing, to the first apparatus along with the cell group configuration, at least one measurement configuration for generic cell measurements, wherein the at least one measurement configuration comprises a reporting configuration indicating a destination of a measurement report of the generic cell measurements.
[0190] In some example embodiments, the second apparatus further comprises: means for obtaining a threshold associated with a radio link quality along with the measurement report; and means for determining the generic cell to be used for the cell change based on the threshold.
[0191] In some example embodiments, the second apparatus further comprises: means for providing, to the first apparatus along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.
[0192] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network node.
[0193] FIG. 8 is a simplified block diagram of a device 800 that is suitable for implementing example embodiments of the present disclosure. The device 800 may be provided to implement a communication device, for example, the first apparatus 110 or the second aparatus 120 as shown in FIG. 1. As shown, the device 800 includes one or more processors 810, one or more memories 820 coupled to the processor 810, and one or more communication modules 840 coupled to the processor 810.
[0194] The communication module 840 is for bidirectional communications. The communication module 840 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 840 may include at least one antenna.
[0195] The processor 810 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0196] The memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 824, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , 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) 822 and other volatile memories that will not last in the power-down duration.
[0197] A computer program 830 includes computer executable instructions that are executed by the associated processor 810. The instructions of the program 830 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 830 may be stored in the memory, e.g., the ROM 824. The processor 810 may perform any suitable actions and processing by loading the program 830 into the RAM 822.
[0198] The example embodiments of the present disclosure may be implemented by means of the program 830 so that the device 800 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 7. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0199] In some example embodiments, the program 830 may be tangibly contained in a computer readable medium which may be included in the device 800 (such as in the memory 820) or other storage devices that are accessible by the device 800. The device 800 may load the program 830 from the computer readable medium to the RAM 822 for execution. 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) .
[0200] FIG. 9 shows an example of the computer readable medium 900 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 900 has the program 830 stored thereon.
[0201] 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.
[0202] 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.
[0203] 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.
[0204] 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.
[0205] 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.
[0206] 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.
[0207] 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 apparatus at least to:receive, from a second apparatus, a cell group configuration including a plurality of generic cell configurations;receive, from the second apparatus, an indication of a cell change of the first apparatus indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier associated with the cell change; andperform an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.2.The first apparatus of claim 1, wherein the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.3.The first apparatus of claim 1 or 2, wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.4.The first apparatus of any of claims 1-3, wherein the first apparatus is caused to:receive the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.5.The first apparatus of any of claims 1-4, wherein the first apparatus is caused to:receive, from the second apparatus, the indication of activating an SCell for the first apparatus and the cell identifier associated with the SCell activation;select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; andactivate a generic cell configured by the determined generic cell configuration as the SCell of the first apparatus.6.The first apparatus of claim 5, wherein the indication further comprises an additional indicator indicating the generic cell configuration is to be used for an SCell configuration.7.The first apparatus of any of claims 1-4, wherein the first apparatus is caused to:receive, from the second apparatus, the indication of the PCell change for the first apparatus and the cell identifier associated with the PCell change;select, from the plurality of generic cell configurations, the generic cell configuration corresponding the cell identifier; andactivate a generic cell configured by the determined generic cell configuration as the PCell of the first apparatus while discarding a further PCell serving the first apparatus previously.8.The first apparatus of claim 7, wherein the indication further comprises an additional indicator indicating the generic cell configuration is not allowed to be used for an SCell configuration.9.The first apparatus of claim 7, wherein a further generic cell configuration associated with the disabled PCell is considered as being allowed to be used for a SCell configuration.10.The first apparatus of any of claims 1-9, wherein the first apparatus is caused to:obtain, along with the cell group configuration, at least one measurement configuration for generic cell measurements;determine a plurality of generic cells based on the cell group configuration; andperform, based on the at least one measurement configuration, the generic cell measurements on a radio link quality associated with the plurality of generic cells.11.The first apparatus of claim 10, wherein the first apparatus is caused to:in accordance with a determination that a first generic cell in the plurality of generic cells is currently used as a PCell,transmit, to the first generic cell, a measurement report of the generic cell measurements excluding measurements on at least one generic cell that is used as PCell or SCell, orterminate performing the generic cell measurements.12.The first apparatus of claim 10, wherein the first apparatus is caused to:in accordance with a determination that a second generic cell in the plurality of generic cells is currently used as a SCell, transmit a measurement report of the generic cell measurements to the second generic cell and / or a PCell currently serving the first apparatus.13.The first apparatus of any of claims 1-12, wherein the first apparatus is caused to:obtain, along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.14.The first apparatus of claim 13, wherein the first apparatus is caused to:in accordance with a determination that a RACH-less indication is received along with an indication of the PCell change to a generic cell, perform a RACH-less access procedure to the generic cell using the configured grant configuration, wherein the generic cell is activated and used as a SCell.15.The first apparatus of claim 13, wherein the first apparatus is caused to:in accordance with a determination that a RACH-based indication is received along with an indication of the PCell change to a generic cell, perform a random access procedure to the generic cell using the random access configuration.16.The first apparatus of any of claims 1-15, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network node.17.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 apparatus at least to:transmit, to a first apparatus, a cell group configuration including a plurality of generic cell configurations; andin accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmit, to the first apparatus, an indication of the cell change indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier of the generic cell.18.The second apparatus of claim 17, wherein the plurality of generic cell configurations is allowed to be used for PCell configurations in a default state, and wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used as an SCell configuration.19.The second apparatus of claim 17 or 18, wherein an additional indicator included in the cell group configuration at least indicates whether a generic cell configuration in the plurality of generic cell configurations is to be used for an activated SCell, a deactivated SCell or a PCell.20.The second apparatus of any of claims 17-19, wherein the second apparatus is caused to:transmit the cell group configuration via a radio resource control, RRC, message or a medium access control, MAC, message.21.The second apparatus of any of claims 17-20, wherein the second apparatus is caused to:provide, to the first apparatus along with the cell group configuration, at least one measurement configuration for generic cell measurements, wherein the at least one measurement configuration comprises a reporting configuration indicating a destination of a measurement report of the generic cell measurements.22.The second apparatus of claim 21, wherein the second apparatus is caused to:obtain a threshold associated with a radio link quality along with the measurement report; anddetermine the generic cell to be used for the cell change based on the threshold.23.The second apparatus of any of claims 17-22, wherein the second apparatus is caused to:provide, to the first apparatus along with the cell group configuration, a random access channel, RACH, configuration and a configured grant configuration for the cell change.24.The second apparatus of any of claims 17-23, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network node.25.A method comprising:receiving, from a second apparatus by a first apparatus, a cell group configuration including a plurality of generic cell configurations;receiving, from the second apparatus, an indication of a cell change of the first apparatus indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier associated with the cell change; andperforming an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.26.A method comprising:transmitting, from a second apparatus to a first apparatus, a cell group configuration including a plurality of generic cell configurations; andin accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmitting to the first apparatus, an indication of the cell change indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier of the generic cell.27.A first apparatus comprising:means for receiving, from a second apparatus, a cell group configuration including a plurality of generic cell configurations;means for receiving, from the second apparatus, an indication of a cell change of the first apparatus indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier associated with the cell change; andmeans for performing an operation of cell change using a generic cell configuration associated with the cell identifier in the plurality of generic cell configurations.28.A second apparatus comprising:means for transmitting, to a first apparatus, a cell group configuration including a plurality of generic cell configurations; andmeans for, in accordance with a determination that a generic cell is associated with a cell change of the first apparatus, transmitting to the first apparatus, an indication of the cell change indicating a primary cell, PCell, change or a secondary cell, SCell, activation and a cell identifier of the generic cell.29.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 25 or the method of claim 26.