Channel filter of user equipment

Abstract

Embodiments of the present disclosure relate to apparatuses, methods, and computer readable storage media for channel filter selection. The method comprises: detecting a synchronization signal and a physical broadcast channel from a second apparatus; determining whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth (CBW) at which the first apparatus is operating; and selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set (CORESET) configuration detected from the physical broadcast control channel and the specific CBW.

Description

CHANNEL FILTER OF USER EQUIPMENTFIELDS

[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 user equipment (UE) channel filter facilitating smooth migration for future railway mobile communication systems (FRMCS).BACKGROUND

[0002] A work item on new radio (NR) support for dedicated spectrum less than 5MHz for frequency range 1 (FR1) was approved. This work item relates to a specialized network, which are used to provide mission critical communications for industry verticals such as smart energy and infrastructure, public safety, and railway communications and also to 3MHz channel bandwidth (CBW) for any scenarios. These networks would benefit not only from the high spectral efficiency of 5G NR, but also from its other features like ultra-reliability and low latency.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 first apparatus at least to: detect a synchronization signal and a physical broadcast channel from a second apparatus; determine whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating; and select a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set (CORESET) configuration detected from the physical broadcast control channel and the specificCBW.

[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 second apparatus at least to: transmit, to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0005] In a third aspect of the present disclosure, there is provided a method. The method comprises: detecting a synchronization signal and a physical broadcast channel from a second apparatus; determining whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating; and selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0006] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0007] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for detecting a synchronization signal and a physical broadcast channel from a second apparatus; means for determining whethera synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating; and means for selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[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 synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[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 a typical migration scenario for railway communications;

[0015] FIG. 3 illustrates an example of CORESET#0 frequency domain resource allocation according to some example embodiments of the present disclosure;

[0016] FIG. 4 illustrates a signaling chart 400 for communication according to some example embodiments of the present disclosure;

[0017] FIG. 5 illustrates an example of CORESET puncturing and the predefined association between the indices according to some example embodiments of the present disclosure;

[0018] FIG. 6 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure;

[0019] FIG. 7 illustrates a flowchart of a method implemented at a second apparatus according to 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: ” and “at least one of ” 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 notlimited 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), the 5G-Advanced, 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 nonterrestrial 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 (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.

[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. In some embodiments, frequency domain resources may cover one or more resource blocks, each having 12 subcarriers and time domain resource resources may cover one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols.

[0036] FIG. 1 shows an example communication network 100 in which embodiments of the present disclosure may be implemented. As shown in FIG. 1, the communication network 100 may include a first apparatus 110. Hereinafter the first apparatus 110 may also be referred to as a UE or a terminal device.

[0037] The communication network 100 may further include a second apparatus 120. Hereinafter the second apparatus 120 may also be referred to as a gNB or anetwork device. The first apparatus 110 may communicate with the second apparatus 120.

[0038] It is to be understood that the number of network devices and terminal devices shown in FIG. 1 is given for the purpose of illustration without suggesting any limitations. The communication network 100 may include any suitable number of network devices and terminal devices.

[0039] In some example embodiments, links from the second apparatus 120 to the first apparatus 110 may be referred to as a downlink (DL), while links from the first apparatus 110 to the second apparatus 120 may be 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 receiver). In UL, the first apparatus 110 is a TX device (or transmitter) and the second apparatus 120 is a RX device (or a receiver).

[0040] Communications in the communication environment 100 may be implemented according to any proper communication protocol(s), comprising, but not limited to, cellular communication protocols of the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G), 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, 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 Multiplexing (OFDM), Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.

[0041] As described above, a study of NR support for dedicated spectrum less than 5MHz for FR1 has been discussed.

[0042] For example, the following objectives shall be included for dedicated Frequency Division Duplexing (FDD) spectrum in FR1 :• Specify necessary RAN4 requirements to support deploying NR in spectrum allocations from approximately 3 MHz up to below 5 MHz [RAN4], including in bands nlOO, n8, n26 and n28: o Specify system parameters (including channel and sync rasters) for the associated dedicated spectrum. o Minimize impact on RF requirements: o Reuse 5 MHz channel bandwidth at least for FRMCS use case (assuming co-located NR and GSM-R with same operator). o Specify the required RF requirements for optional 3 MHz channel bandwidth in bands nlOO, n8, n26 and n28.

[0043] Now the discussion will focus on soft migration from Global System for Mobile Communications-Railway (GSM-R) to NR<5MHz. During the migration period from GSM-R to 5G NR, both FRMCS and GSM-R networks will have to be operational in parallel to ensure full serviceability of both old and new rolling stock.

[0044] The ability to deploy 5G NR on bandwidths from around 3 MHz to 5 MHz will be critical. As shown in FIG. 2, a typical migration scenario for railway communications might involve sharing the 5.6 MHz of spectrum with eight 200 kHz GSM-R channels (for example in a frequency reuse 2 configuration with 4 carriers per site), leaving approximately 4 MHz for NR. In an extreme case, sharing the 5.6 MHz of spectrum with fourteen GSM-R channels would only leave 2.8 MHz for NR and guard bands. Therefore, a high degree of flexibility is required for 5G NR as the exact bandwidth available for 5G NR will depend on the number of narrowband GSM-R channels in operation. Furthermore, the migration scenario may change in time, e.g., in such that initial deployments might need more spectrum for GSM-R (leaving less room for 5GNR). The migration scenario may vary from cell to another.

[0045] Corresponding agreement may comprise:• For the 3MHz channel bandwidth in band nlOO (max channel utilization 15PRBs as already agreed in RAN1 / RAN4): o PBCH transmission bandwidth is 12 PRBs o CORESET#0 transmission bandwidth is to be decided by RANI .RANI is requested to consider whether the above also applies for other bands with 3MHz channel bandwidth, or whether the PBCH transmission bandwidth is 15 PRBs for such bands.• For the 5MHz channel bandwidth: o PBCH transmission bandwidth is 20 PRBs; o CORESET#0 transmission bandwidth is to be decided by RANI.• Other details (including sync raster details) are to be progressed in the WGs.

[0046] A consequence of the RAN agreement is that from a UE point of view, different DL signals have different (maximum) transmission bandwidth.• PBCH: 12 RBs and 20 RBs for 3 MHz and 5 MHz channel bandwidth, respectively. PDSCH: 12 or 15 RBs and 20 or 25 RBs for 3 MHz and 5 MHz channel bandwidth, respectively

[0047] Furthermore, other corresponding agreement may involve: o For CORESET#0 transmission bandwidth, both 12 PRBs and 15 PRBs are supported.• In Case of 12 PRBs, the legacy interleaved (R=2) CORESET CCE-to- REG mapping is used with ARBCORESET= 12, i.e., 12PRBs are indicated without puncturing.• In Case of 15 PRBs, the ARBCORESET= 24 CORESET#0 is punctured.• Both interleaved (legacy interleaver size of R=2) and non-interleaved mapping are supported,• Some entries in the table are related with interleaved mapping and some are non-interleaved mapping.

[0048] As described above, i.e., one of the objectives of the work item may be “identify and specify necessary minimum changes to physical downlink control channel (PDCCH) for functional support based on existing design, without optimization. During system information acquisition, UE monitors PDCCH on resources (CORESET#0) spanning at least 4.32 MHz (i.e., 24 RBs), i.e., exceedingthe targeted transmission bandwidths of 20, 15 and 12 RBs. The PDCCH changes that are necessary to support NR in narrow spectrum allocations should therefore be focused on these PDCCH resources. Another PDCCH aspect requiring attention is the PDCCH frequency domain location with respect to synchronization signal block (SSB).

[0049] The PDCCH can be mapped to sets of physical resources known as CORESETs, which in turn is comprised of control channel elements (CCEs). A control -channel element consists of 6 resource-element groups (REGs) where a resource-element group equals one resource block during one OFDM symbol.

[0050] CORESETs can be flexibly configured to the UE after the initial access. However, there are limited configuration options available for the CORESET#0 that are used e.g., for the PDCCH that schedules the transmission of System Information Block 1 (SIB1), known as TypeO-PDCCH.

[0051] First, the CORESET#0 frequency domain location can be considered with respect to SSB. FIG. 3 shows an example of CORESET#0 frequency domain resource allocation.

[0052] As shown in FIG. 3, after the UE has detected Primary synchronization signal (PSS) 301 and Secondary synchronization signal (SSS) 303 and demodulated the PBCH 302, the UE has acquired the Master Information Block (MIB) on the PBCH 302. Next the UE needs to acquire the remaining minimum system information, carried by the SIB1. The UE reads the CORESET#0 configuration index from the MIB on the PBCH 302, which indicates time and frequency resource allocation parameters for the CORESET 305. One of the parameters defines the frequency domain offset 304 between the first RB in which the SSB is located and the first RB of CORESET#0.

[0053] For 3 MHz CBW, 12 PRB PBCH is agreed to be used. To allow for more GSM-R carriers to be placed within the 5.6 MHz spectrum to facilitate smooth migration from GSM-R to NR, 12 PRB (out of the available 15 PRB) transmission bandwidth within 3 MHz CBW as well as 20 PRB (out of the available 25 PRB) transmission bandwidth within 5 MHz CBW is required to be allowed.

[0054] Consequently, two additional sync raster points for frequency band nlOO have been agreed: one at 920.73 MHz for 12 PRB PBCH transmission bandwidth,and another one at 921.45 MHz for 20 PRB PBCH transmission bandwidth, which are aligned with the lower band edge of the 5.6 MHz spectrum. The synch raster point at 921.45 MHz is skipped for 12 PRB PBCH transmission bandwidth and is used only for 20 PRB PBCH transmission bandwidth.

[0055] One of the main problems with using 12 PRB (out of the available 15 PRB) transmission bandwidth within 3 MHz CBW is that RAN4 RF requirements are specified for the 3 MHz CBW and 15 PRB transmission bandwidth, but not for the 12 PRB transmission bandwidth.

[0056] Therefore, a UE using 12 PRB transmission bandwidth within 3 MHz CBW would have coexistence issues with e.g., adjacent GSM-R carriers that fall within the 3 MHz CBW. Namely the NR UE transmitter would cause unwanted spurious emission into GSM-R BTS receiver, and the NR UE receiver would be blocked by the interference caused by the GSM-R BTS transmitter.

[0057] For example, the problem relating to NR UE Adjacent Channel Selectivity (ACS) requirements is where GSM-R carriers 1 and 2 fall within the 3 MHz NR CBW, and hence would have coexistence issues as the ACS requirements only cover interfering carriers outside the 3 MHz NR CBW.

[0058] The problem as described above may need to be further discussed.

[0059] According to some example embodiments of the present disclosure, there is provided a solution for selecting a UE channel filter. In this solution, the first apparatus 110 detects a SSB and a PBCH from a second apparatus. If the first apparatus 110 determines whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location, the first apparatus 110 selects a type of a channel filter based at least on the specific CBW and the frequency location of the detected synchronization raster. If the first apparatus 110 determines whether a synchronization raster, at which the synchronization signal is detected, is defined for a specific CBW at which the first apparatus is operating, the first apparatus 110 selects a type of a channel filter based on at least an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0060] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0061] It is very important that analog receiver channel selection filter is set to correspond to wanted signal bandwidth because if selection filter is wider than wanted signal then possible adjacent channel interference may pass through the filter and overload the analog to digital converter (A / D converter). If the A / D converter suffers excess interference this will reduce the number of effective bits for wanted signal which leads to reduced dynamic range and reduced wanted signal to noise ratio (SNR). The relation may be described as:ENOB=(SINAD-1.76) / 6.02 (1) where ENOB represents effective number of bits and SINAD, which means signal, noise, and distortion, represents a power ratio indicating the quality of the signal in dB.

[0062] In addition to analog channel selection filter there is digital channel selection filter which needs to be set also according to wanted signal bandwidth in order to maximize SNR.

[0063] Similarly on transmitter side analog and digital filters needs to be adjusted to match the wanted signal in order to reduce unwanted emissions.

[0064] However, the first apparatus 110 may need to know how to decide whether to apply the narrowband (12 or 20 PRB, correspondingly) or wideband (15 or 25 PRB, correspondingly) channel filter when it is operating in 3 MHz or 5 MHz CBW, correspondingly.

[0065] 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 the first apparatus 110 (e.g., a terminal device) and the second apparatus 120 (e.g., a network device). For the purpose of discussion, reference is made to FIG. 1 to describe the signaling chart 400. It is to be understood that the process shown in FIG. 4 may also be adopted by other terminal devices and network devices shown in FIG. 1.

[0066] As shown in FIG. 4, the second apparatus 120 initiate (405) a synchronization signal (SS) and physical broadcast channel (PBCH) transmission, which may also be referred to SS block and a PBCH block (SSB). The SS used herein may include a primary synchronization signal (PSS) and / or a secondarysynchronization signal (SSS).

[0067] The first apparatus 110 may detect the SS and PBCH at various synchronization raster points.

[0068] As one option, the first apparatus 110 may determine (410) whether a synchronization raster point, at which the SS is detected, is on a specific frequency location.

[0069] For the case where the first apparatus is operating within 3 MHz CBW (hereinafter may also be referred to as the first CBW), the first apparatus 110 may determine whether the PSS and / or SSS is detected from a synchronization raster point on a specific frequency location (e.g., = 920.73 MHz). If so, the first apparatus 110 may assume that this synchronization raster point is specific for 12-PRB transmission bandwidth configuration within 3 MHz CBW. Therefore, the first apparatus 110 may select (420) a (narrowband) 12-PRB channel filter.

[0070] If the first apparatus 110 determines the PSS and / or SSS is not detected from a synchronization raster point on a specific frequency location (e.g., = 920.73 MHz), the first apparatus 110 may select (420) a (wideband) 15-PRB channel filter for the other sync raster points for 3 MHz CBW.

[0071] For the case where the first apparatus is operating within 5 MHz CBW (hereinafter may also be referred to as the second CBW), the first apparatus 110 may determine whether the PSS and / or SSS is detected from a synchronization raster point on a specific frequency location (e.g., = 921.45 MHz). If so, the first apparatus 110 may assume that this synchronization raster point is specific for 20-PRB transmission bandwidth configuration within 5 MHz CBW. Therefore, the first apparatus 110 may select (420) a (narrowband) 20-PRB channel filter.

[0072] If the first apparatus 110 determines the PSS and / or SSS is not detected from a synchronization raster point on a specific frequency location (e.g., = 921.45 MHz), the first apparatus 110 may select (420) a (wideband) 25-PRB channel filter for the other sync raster points for 5 MHz CBW.

[0073] The above-mentioned solution may be based on assumptions that 920.73 MHz and 921.45 MHz will not be used for 15 PRB and 20 PRB transmission bandwidth, respectively. In a further solution to be described below, the firstapparatus 110 may determine (415) whether a synchronization raster point, at which the SS is detected, is on a specific frequency location.

[0074] For the case where the first apparatus is operating within 3 MHz CBW, the first apparatus 110 may determine whether the PSS and / or SSS is detected from a synchronization raster point that is defined for the operating CBW width (e.g., 3MHz CBW), if so, the first apparatus 110, based on the detection of the PBCH (via master information block, for example), may obtain information of an index associated with a configuration of CORESET #0. Specifically, the information of the index may be obtained from Table 1. It is to be understood that Table 1 should not be seen as limiting. For example, offset (RBs) parameter for at least certain indexes may be changed (compared to the example shown in Table 2). There can be also other columns added to the table, e.g., interleaved vs. non-interleaved CCE mapping.Table 1 : set of resource blocks and slots symbols of CORESET for TypeO-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is { 15, 15} kHz for frequency bands with minimum channel bandwidth 5MHz or 10MHz or with minimum channel bandwidth 3MHz and channel bandwidth larger than 3MHz

[0075] As shown in Table 1, an index may indicate an SS / PBCH block and CORESET multiplexing pattern, the number of RBs in the CORESET 0#, the number of symbols in the CORESET 0#, and an offset between the CORESET 0# and the SS in the frequency domain.

[0076] By reading corresponding parameters in the index indicated in the PBCH, if the first apparatus 110 determines the number of RBs in the CORESET 0# (i.e., RBs NRBRESET) is 12, when detecting further DL channels and signals (other than SSB), the first apparatus 110 may operate according to a narrowband configuration and select (420) a (narrowband) 12-PRB channel filter.

[0077] If the first apparatus 110 determines the number of RBs in the CORESET 0# (i.e., RBs NRBRESET) is 24, when detecting further DL channels and signals (other than SSB), the first apparatus 110 may operate according to a wideband configuration and select (420) a (wideband) 15-PRB channel filter.

[0078] For the case where the first apparatus is operating within 5 MHz CBW, the first apparatus 110 may determine whether the PSS and / or SSS is detected from a synchronization raster point that is defined for the operating CBW width (e.g., 5 MHz CBW), if so, the first apparatus 110, based on the detection of the PBCH (via master information block, for example), may obtain information of an index associated with a configuration of CORESET #0. Specifically, the information of the index may be obtained from Table 2.Table 2: set of resource blocks and slots symbols of CORESET for TypeO-PDCCHsearch space set when {SS / PBCH block, PDCCH} SCS is { 15, 15} kHz for frequency bands with minimum channel bandwidth 5MHz or 10MHz or with minimum channel bandwidth 3MHz and channel bandwidth larger than 3MHz

[0079] Similar with Table 1, in Table 2, an index may indicate an SS / PBCH block and CORESET multiplexing pattern, the number of RBs in the CORESET 0#, the number of symbols in the CORESET 0#, and an offset between the CORESET 0#and the SS in the frequency domain. Indexes 0-5 may be considered as valid Indexes when operating in FRMCS scenario, nlOO and 5MHz CBW. The UE may not expect to receive other Indexes in this scenario.

[0080] Furthermore, each index of the Table 2 (or at least Indexes 0-5) may have a predefined association to narrowband or wideband configuration. As an option, the predefined association may be explicitly indicated. For example, the predefined association may be conveyed by a parameter (or a property) in a row of the Table 2, where the row is selected by the index.

[0081] As another option, the predefined association may be implicit determined based the size of the CORESET#0 (in PRBs) after puncturing. For example, a narrowband operation (for DL channels and signals) is assumed when CORESET#0 size after puncturing equal to 20 RBs, while a wideband operation is assumed (for DL channels and signals) when CORSET#0 is not punctured, i.e., CORSET#0 size = 24 RBs. The puncturing information (defining the size of the CORSET#0) may be conveyed by a predefined rule and / or a property in a row of the Table 2, where the row is selected by the index.

[0082] Based on this, the first apparatus 110 may select (420) a wideband channel filter or a narrowband channel filter.

[0083] FIG. 5 shows an example of CORESET puncturing and the predefined association between the indices according to some example embodiments of the present disclosure.

[0084] Indexes #0-2 may cover different RB offset values for 2 OFDM symbol CORESET#0. Indexes #3-5 may cover different RB offset values for 3 OFDM symbol CORESET#0.

[0085] Indexes #0 and 3 (RB Offset = 0) involve wideband transmission. In these cases CORESET#0 is not punctured. Indexes #1, 4 with RB Offset = 2 and indexes #2, 5 with RB Offset = 4 involve narrowband transmission. In these cases, the predefined RBs are punctured.

[0086] It is to be understood that the connection between CORESET#0 puncturing and wideband / narrowband operation is not limited to the example shown in FIG. 5. It is also possible that a predefined offset between the Index of the Table 2 andnarrowband / wideband association may be specified.

[0087] Furthermore, carrier bandwidth part (BWP) is a contiguous set of physical RBs selected from a contiguous subset of the common resource blocks for a given numerology on a given carrier. The BWP defines the available RBs for different scenarios. Initial DL BWP is used e.g., when receiving PDSCH before dedicated RRC connection. It may be defined based on the received SSB.

[0088] Although the initial DL BWP can be determined by RBs of CORESET#0, for NR<5MHz scenarios, initial DL BWP can be determined according nonpunctured RBs of a CORESET#0. This means that the size of initial DL BWP could be 12 or 15 RBs for 3MHz CBW, and 20 or 24 RBs for 5MHz CBW respectively. The number of non-punctured RBs of a CORESET#0 could be selected, e.g., from the lowest RBs of CORESET#0.

[0089] For NR<5MHz scenarios, a dedicated DL BWP can be configured via a RRC signaling, and it can be up-to 15 RBs for 3MHz CBW and up-to 25 RBs for 5 MHz CBW, respectively.

[0090] Therefore, as another option, the first apparatus 110 may also select a channel filter for DL reception based on a dedicated DL BWP in a DL BWP configuration, such as an initial DL BWP.

[0091] It is to be understood that similar principle (associated with embodiments as described above) can be applied also when selecting a channel filter for UL transmission, i.e., to make it based on UL BWP (e.g., based on initial UL BWP).

[0092] Based on the solutions of the present disclosure, robust performance operation can be achieved under the challenging coexistence scenario.

[0093] 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.

[0094] At block 610, the first apparatus 110 detects a synchronization signal and a physical broadcast channel from a second apparatus.

[0095] At block 620, the first apparatus 110 determines whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequencylocation or defined for a specific CBW at which the first apparatus is operating.

[0096] At block 630, if the first apparatus 110 determines whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location, at block 640, the first apparatus 110 selects a type of a channel filter based at least on the specific CBW and the frequency location of the detected synchronization raster.

[0097] At block 650, if the first apparatus 110 determines whether a synchronization raster, at which the synchronization signal is detected, is defined for a specific CBW at which the first apparatus is operating, at block 660, the first apparatus 110 selects a type of a channel filter based at least on an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0098] In some example embodiments, the synchronization signal comprises at least one of the following: a primary synchronization signal, or a secondary synchronization signal.

[0099] In some example embodiments, the method 600 further comprises: in accordance with a determination that the synchronization raster is on the specific frequency location, determining that a narrowband channel filter corresponding to a bandwidth narrower than the specific CBW is to be applied.

[0100] In some example embodiments, the method 600 further comprises: in accordance with a determination that the synchronization raster is not on the specific frequency location, determining that a wideband channel filter corresponding to the specific CBW is to be applied.

[0101] In some example embodiments, the method 600 further comprises: in accordance with a determination that the synchronization raster is defined for a first CBW, determining the index associated with the CORESET configuration; and determining the type of the channel filter based on the number of resource blocks, RBs, corresponding to the index.

[0102] In some example embodiments, the method 600 further comprises: in accordance with a determination that the synchronization raster is defined for a second CBW, determining the index associated with the CORESET configuration;obtaining a predefined association of the index to a narrowband or wideband configuration; and determining the type of the channel filter based on the predefined association.

[0103] In some example embodiments, the method 600 further comprises: in accordance with a determination that the synchronization raster is defined for a second CBW, determining the index associated with the CORESET configuration; determining a size of a CORESET after puncturing corresponding to the index; and determining the type of the channel filter based on the size of the CORESET after puncturing.

[0104] In some example embodiments, the CORESET configuration is a CORESET#0 configuration.

[0105] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.

[0106] 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.

[0107] At block 710, the second apparatus 120 transmits, to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0108] In some example embodiments, the CORESET configuration is a CORESET#0 configuration.

[0109] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.

[0110] In some example embodiments, a first apparatus capable of performing anyof 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.

[0111] In some example embodiments, the first apparatus comprises means for detecting a synchronization signal and a physical broadcast channel from a second apparatus; means for determining whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating; and means for selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0112] In some example embodiments, the synchronization signal comprises at least one of the following: a primary synchronization signal, or a secondary synchronization signal.

[0113] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the synchronization raster is on the specific frequency location, determining that a narrowband channel filter corresponding to a bandwidth narrower than the specific CBW is to be applied.

[0114] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the synchronization raster is not on the specific frequency location, determining that a wideband channel filter corresponding to the specific CBW is to be applied.

[0115] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the synchronization raster is defined for a first CBW, determining the index associated with the CORESET configuration; and means for determining the type of the channel filter based on the number of resource blocks, RBs, corresponding to the index.

[0116] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the synchronization raster isdefined for a second CBW, determining the index associated with the CORESET configuration; means for obtaining a predefined association of the index to a narrowband or wideband configuration; and means for determining the type of the channel filter based on the predefined association.

[0117] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the synchronization raster is defined for a second CBW, determining the index associated with the CORESET configuration; means for determining a size of a CORESET after puncturing corresponding to the index; and means for determining the type of the channel filter based on the size of the CORESET after puncturing.

[0118] In some example embodiments, the CORESET configuration is a CORESET#0 configuration.

[0119] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.

[0120] In some example embodiments, the first apparatus further comprises means for performing other operations in some example embodiments of the method 600 or the first apparatus 110. In some example embodiments, the means comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the performance of the first apparatus.

[0121] 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.

[0122] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific CBW at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; oran index associated with a CORESET configuration detected from the physical broadcast control channel and the specific CBW.

[0123] In some example embodiments, the CORESET configuration is a CORESET#0 configuration.

[0124] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.

[0125] In some example embodiments, the second apparatus further comprises means for performing other operations in some example embodiments of the method 700 or the second apparatus 120. In some example embodiments, the means comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the performance of the second apparatus.

[0126] 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 apparatus 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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. 4 to FIG. 7. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0132] 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).

[0133] 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.

[0134] Generally, various embodiments of the present disclosure may beimplemented 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.

[0135] 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.

[0136] 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.

[0137] In the context of the present disclosure, the computer program code orrelated 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.

[0138] 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.

[0139] 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.

[0140] 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

WHAT IS CLAIMED IS:

1. A first apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: detect a synchronization signal and a physical broadcast channel from a second apparatus; determine whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, at which the first apparatus is operating; and select a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

2. The first apparatus of claim 1, wherein the synchronization signal comprises at least one of the following: a primary synchronization signal, or a secondary synchronization signal.

3. The first apparatus of claim 1, wherein the first apparatus is further caused to: in accordance with a determination that the synchronization raster is on the specific frequency location, determine that a narrowband channel filter corresponding to a bandwidth narrower than the specific CBW is to be applied.

4. The first apparatus of claim 1, wherein the first apparatus is further causedto: in accordance with a determination that the synchronization raster is not on the specific frequency location, determine that a wideband channel filter corresponding to the specific CBW is to be applied.

5. The first apparatus of claim 1, wherein the first apparatus is further caused to: in accordance with a determination that the synchronization raster is defined for a first CBW, determine the index associated with the CORESET configuration; and determine the type of the channel filter based on the number of resource blocks, RBs, corresponding to the index.

6. The first apparatus of claim 1, wherein the first apparatus is further caused to: in accordance with a determination that the synchronization raster is defined for a second CBW, determine the index associated with the CORESET configuration; obtain a predefined association of the index to a narrowband or wideband configuration; and determine the type of the channel filter based on the predefined association.

7. The first apparatus of claim 1, wherein the first apparatus is further caused to: in accordance with a determination that the synchronization raster is defined for a second CBW, determine the index associated with the CORESET configuration; determine a size of a CORESET after puncturing corresponding to the index; and determine the type of the channel filter based on the size of the CORESET after puncturing.

8. The first apparatus of claim 1, wherein the CORESET configuration is a CORESET#0 configuration.

9. The first apparatus of claims 1-8, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network device.

10. A second apparatus comprising: at least one processor; and at 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, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, of a specific width at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

11. The second apparatus of claim 10, wherein the CORESET configuration is a CORESET#0 configuration.

12. The second apparatus of claim 10 or 11, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network device.

13. A method comprising:detecting, at a first apparatus, a synchronization signal and a physical broadcast channel from a second apparatus; determining whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, of a specific width at which the first apparatus is operating; and selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

14. A method comprising: transmitting, from a second apparatus to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, of a specific width at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

15. A first apparatus comprising: means for detecting a synchronization signal and a physical broadcast channel from a second apparatus;means for determining whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, of a specific width at which the first apparatus is operating; and means for selecting a type of a channel filter based at least on the determination and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

16. A second apparatus comprising: means for transmitting, to a first apparatus, a synchronization signal and a physical broadcast channel, to cause the first apparatus to select a type of a channel filter based on a determination of whether a synchronization raster, at which the synchronization signal is detected, is on a specific frequency location or defined for a specific channel bandwidth, CBW, of a specific width at which the first apparatus is operating, and at least one of the following: the specific CBW and the frequency location of the detected synchronization raster; or an index associated with a control resource set, CORESET, configuration detected from the physical broadcast control channel and the specific CBW.

17. A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 13 or the method of claim 14.

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