User equipment, radio network node, and methods performed therein

Abstract

Embodiments herein relate to, for example, a method performed by a UE (10) for handling communication in a wireless communication network. The UE (10) upon a condition fulfilled, transmits to a radio network node (120), an indication requesting transmission of a synchronization signal, wherein the condition comprises one or more of the following: • when a speed of the UE (10) is above a speed threshold; • when the UE (10) has moved more than a distance; • when the UE (10) detects user activity of the UE (10); • when a measurement of a downlink reference signal is below a signal threshold; • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and • when the UE (10) fulfills a mobility event.

Description

[0001] USER EQUIPMENT, RADIO NETWORK NODE, AND METHODS PERFORMED THEREIN

[0002] TECHNICAL FIELD

[0003] Embodiments herein relate to a user equipment (UE), a radio network node, and methods performed therein regarding wireless communication. Furthermore, a computer program product and a computer readable storage medium are also provided herein. In particular, embodiments herein relate to handling communication, such as handling synchronization signals, in a wireless communication network.

[0004] BACKGROUND

[0005] In a typical wireless communication network, UEs, also known as wireless communication devices, mobile stations, stations (STA) and / or wireless devices, communicate via a Radio Access Network (RAN) with one or more core networks (CN). The RAN covers a geographical area which is divided into service areas or cells, with each service area or cell being served by a radio network node such as an access node, e.g., a Wi-Fi access point or a radio base station (RBS), which in some networks may also be called, for example, a NodeB, a gNodeB, or an eNodeB. The service area or cell is a geographical area where radio coverage is provided by the radio network node. The radio network node operates on radio frequencies to communicate over an air interface with the UEs within range of the radio network node. The radio network node communicates over a downlink (DL) to the UE and the UE communicates over an uplink (UL) to the radio network node.

[0006] A Universal Mobile Telecommunications System (UMTS) is a third generation (3G) telecommunication network, which evolved from the second generation (2G) Global System for Mobile Communications (GSM). The UMTS terrestrial radio access network (UTRAN) is essentially a RAN using wideband code division multiple access (WCDMA) and / or High-Speed Packet Access (HSPA) for communication with user equipment. In a forum known as the Third Generation Partnership Project (3GPP), telecommunications suppliers propose and agree upon standards for present and future generation networks and investigate e.g. enhanced data rate and radio capacity. In some RANs, e.g. as in UMTS, several radio network nodes may be connected, e.g., by landlines or microwave, to a controller node, such as a radio network controller (RNC) or a base station controller (BSC), which supervises and coordinates various activities of the plural radio network nodes connected thereto. The RNCs are typically connected to one or more core networks.

[0007] Specifications for the Evolved Packet System (EPS) have been completed within the 3GPP and coming 3GPP releases, such as New Radio (NR), are worked on. The EPS comprises the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), also known as the Long-Term Evolution (LTE) radio access network, and the Evolved Packet Core (EPC), also known as System Architecture Evolution (SAE) core network. E-UTRAN / LTE is a 3GPP radio access technology wherein the radio network nodes are directly connected to the EPC core network. As such, the Radio Access Network (RAN) of an EPS has an architecture comprising radio network nodes connected directly to one or more core networks.

[0008] With the emerging 5G technologies such as NR, the use of very many transmit- and receive-antenna elements may be of great interest as it makes it possible to utilize beamforming, such as transmit-side and receive-side beamforming. Transmit-side beamforming means that the transmitter can amplify the transmitted signals in a selected direction or directions, while suppressing the transmitted signals in other directions. Similarly, on the receive-side, a receiver can amplify signals from a selected direction or directions, while suppressing unwanted signals from other directions. NR is connected to the 5G Core Network (5GC) which comprises a number of Network Functions (NF) such as Session Management Function (SMF), User Plane Function (UPF), Access and Mobility Management Function (AMF), Authentication Service Function (AUSF), Policy Control Function (PCF), Unified Data Manager (UDM), Network Repository Function (NRF), Network Exposure Function (NEF), just to mention some. In the 5GC, NFs can discover other NFs by using a discovery service provided by the NRF.

[0009] The Release-15 (Rel-15) NR synchronization signal block (SSB) consists of 4 orthogonal frequency division multiplexing (OFDM) symbols where symbols 1 and 3 carry primary synchronization signal (PSS) and secondary synchronization signal (SSS), respectively, and symbols 2-4 carry physical broadcast channel (PBCH) containing the master information block (MIB) payload. See Fig. 1.

[0010] In legacy NR scenarios, SSBs are typically configured statically, with, e.g., 20 ms period, with constant power and spatial configuration for initial access cells and serve as de-facto coverage indicators. If a UE detects an SSB indicating a cell at a certain location, with a certain signal strength that allows finding and connecting to the network (NW), the UE may usually make a robust assumption that the same cell will be available in a predictable manner in the future, with a sufficient signal strength, or at least the NW has activated another cell providing coverage at the same location.

[0011] In ongoing NR evolution, on-demand SSBs may be provided temporarily to UEs whose functionality or performance may be improved if additional signals for loop conversion, synchronization, measurements, or other signal processing steps are available. In some scenarios, a cell may be transmitting baseline SSBs at a lower rate, e.g., 160 ms or 20 ms, or no SSBs may be transmitted as a baseline, i.e. as default behavior. The NW may then activate additional SSBs or SSB bursts, e.g. with period 20 ms or 5 ms, respectively, in association with certain procedures, or based on a UE requesting them. On-demands SSBs may also be one-shot transmissions or limited-duration SSB bursts, without a recurrent structure. The on-demand SSBs may be transmitted at the same or at a different power level and spatial configuration than the baseline SSB.

[0012] The work item description (WID) for NR Rel-19 “Enhancements of network energy savings for NR” 3GPP RP-234065, 3GPP TSG RAN Meeting #102, Dec. 11-15, 2023 includes the following objective:

[0013] The 3GPP RP-234065 further includes the following objective: As part of the first and third objectives above, i.e. , to reduce gNB energy consumption at low-to medium load, several improvements may be proposed, such as:

[0014] • Consolidating SSB, physical random access channel (PRACH) occasions, denoted as PO, and random access (RA) transmission and / or reception operations into condensed time intervals and creating gNB sleep opportunities between these intervals. • Avoiding always-on frequent SSB transmissions in all cells and allowing on-demand provision of SSBs instead for reception preparation and measurements.

[0015] • Flexible adaptation of PO patterns between paging capacity-prioritized and Network energy saving (NES)-prioritized configuration. • Flexible adaptation of PO between patterns supporting traditional access and paging and patterns suitable with NES-prioritized PO configurations.

[0016] Some scenarios where such adaptations are expected to be useful include:

[0017] • Secondary cell (SCell) quality measurements upon SCell configuration.

[0018] • Synchronization to an SCell upon SCell activation.

[0019] • Faster or improved-quality Radio Resource Management (RRM) measurements on serving or neighbor cells.

[0020] • Adaptation of PO configurations based on paging load and gNB sleep opportunities.

[0021] • Adaptation of POs based on RA load and / or PO locations.

[0022] • Etc.

[0023] The UE is allowed to perform Radio Link Monitoring (RLM) and / or Beam Failure Detection (BFD) relaxation when a relaxed measurement criterion for low mobility and / or for good serving cell quality is met. If configured to do so, the UE shall trigger reporting of its RLM and / or BFD relaxation status through UE assistance information if the UE changes its respective RLM and / or BFD relaxation status while meeting the UE minimum requirements specified in TS 38.133 v.18.4.0. RLM and BFD relaxation may be enabled or disabled separately through Radio Resource Control (RRC) Configuration. Additionally, RLM relaxation may be enabled or disabled on per Cell Group basis while BFD relaxation may be enabled or disabled on per serving cell basis.

[0024] Furthermore, if configured by the NW, a UE in RRC DLE / INACTIVE is allowed to relax neighbor cell RRM measurements when a set of NW-defined criteria for stationary or low-mobility, and / or not-at-cell-edge is met.

[0025] The low-mobility or stationary criteria are based on fluctuations in UE SSB-based measurements. If the fluctuations are within a certain limit the UE is assumed to be low-mobility (small fluctuations) or stationary (even smaller fluctuations).

[0026] The not-at-cell-edge criterion is based on a fixed SSB-based threshold. If the UE measurements are above the threshold, the UE is assumed to be not-at-cell-edge.

[0027] Relaxation means that the UE performs RRM measurements with longer intervals, such as using scaling factor, or not at all for a certain period. The relaxation is dependent on what combination of criteria the UE fulfills. E.g.:

[0028] • if both stationary AND not-at-cell-edge are fulfilled, the UE needs not measure neighbors for 4 hours

[0029] • If both low-mobility AND not-at-cell-edge are fulfilled, the UE needs not measure neighbors for 1 hour

[0030] • If only low-mobility OR not-at-cell-edge, scaling of 3

[0031] • If stationary, scaling of 6 Also, the NW may configure stationary criterion for a UE in RRC_CONNECTED and the UE reports its RRM measurement relaxation fulfilment status using UE Assistance Information when the stationarity criterion is met or no longer met.

[0032] UE connected mode discontinuous reception (C-DRX) allows the UE to transition to a lower power state where it is not required to receive any transmission from the base station. The intention is to let the UE reduce its energy consumption during connected mode. There is an onDuration (drx-onDurationTimer) on a periodic basis during which UE is awake and monitors for control channels according to its Coreset / Search space configuration, and if there is no control message detected by the UE, the UE can stop receiving transmissions from base station, e.g., no control channel monitoring, until next onDuration occasion. The periods of onDuration occasions followed by the UE are according to NW configuration (drx-ShortCycle, drx-ShortCycITimer, and drx-LongCycle). The NW can configure an onDuration length, and either only long discontinuous reception (DRX) cycles, or a combination of short and long DRX cycles, which leads to the behavior. In case of UL transmission, the UE is not limited to the onDuration occasions and may transmit on physical uplink control channel (PUCCH) or PRACH for UL transmission request.

[0033] Similar to UE C-DRX, discontinuous transmission (DTX) and discontinuous reception (DRX) at the NW side is a feature that enables network energy savings on DL and UL, respectively. The basic idea of the Cell DTX is to introduce sleeping and / or OFF occasions during which the serving cell may go to a sleep state on DL, i.e. , sleeping occasions during which the cell reduces or completely stops all or some transmissions.

[0034] SUMMARY

[0035] As part of developing embodiments herein one or more issues have been identified. According to the WID objective, triggering of on-demand SSB operation may be based on an UL wake-up signal (WUS) using an existing channel and / or signal. How to configure and signal such on-demand synchronization signal operations, such as SSB operation, are addressed in previous work. However, when and / or why the UE will send such on-demand synchronization signal transmission request, such as an SSB request, i.e., what event(s) causes the UE to request on- demand synchronization signal, is an open issue that is addressed herein. With adaptation of common signals and / or channels being standardized in NR Rel-19, it may happen that the UE providing request for adaptation of common signal and / or channel transmission is standardized in a later 5G NR release and / or in 6G.

[0036] An object of embodiments herein is to handle communication in a wireless communication network in an efficient manner.

[0037] According to an aspect the object is achieved, according to some embodiments herein, by providing a method performed by a UE for handling communication in a wireless communication network. The UE transmits, upon a condition fulfilled, to a radio network node, an indication requesting transmission of a synchronization signal. The condition comprises one or more of the following:

[0038] • when a speed of the UE is above a speed threshold;

[0039] • when the UE has moved more than a distance;

[0040] • when the UE detects user activity of the UE;

[0041] • when a measurement of a downlink reference signal is below a signal threshold;

[0042] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0043] • when the UE fulfills a mobility event.

[0044] According to another aspect the object is achieved, according to some embodiments herein, by providing a method performed by a radio network node, such as gNB, for handling communication in a wireless communication network. The radio network node transmits to a UE, a configuration indication comprising a configuration for requesting a transmission of a synchronization signal, wherein the configuration comprises a condition to be fulfilled for requesting the transmission of a synchronization signal. The condition comprises one or more of the following:

[0045] • when a speed of the UE is above a speed threshold;

[0046] • when the UE has moved more than a distance;

[0047] • when the UE detects user activity of the UE;

[0048] • when a measurement of a downlink reference signal is below a signal threshold;

[0049] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0050] • when the UE fulfills a mobility event.

[0051] The radio network node then receives from the UE, an indication requesting transmission of a synchronization signal; and triggers a transmission based on the received indication.

[0052] It is furthermore provided herein a computer program product comprising instructions, which, when executed on at least one processor, cause the at least one processor to carry out the methods herein, as performed by the UE and the radio network node, respectively. It is additionally provided herein a computer-readable storage medium, having stored thereon a computer program product comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the methods herein, as performed by the UE and the radio network node, respectively.

[0053] According to another aspect the object is achieved by providing a UE, and a radio network node configured to perform the methods herein, respectively.

[0054] Thus, according to an aspect the object is achieved, according to some embodiments herein, by providing a UE for handling communication in a wireless communication network. The UE is configured to transmit, upon a condition fulfilled, to a radio network node, an indication requesting transmission of a synchronization signal. The condition comprises one or more of the following:

[0055] • when a speed of the UE is above a speed threshold;

[0056] • when the UE has moved more than a distance;

[0057] • when the UE detects user activity of the UE;

[0058] • when a measurement of a downlink reference signal is below a signal threshold;

[0059] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0060] • when the UE fulfills a mobility event.

[0061] According to another aspect the object is achieved, according to some embodiments herein, by providing a radio network node for handling communication in a wireless communication network. The radio network node is configured to transmit to a UE, a configuration indication comprising a configuration for requesting a transmission of a synchronization signal, wherein the configuration comprises a condition to be fulfilled for requesting the transmission of a synchronization signal. The condition comprises one or more of the following:

[0062] • when a speed of the UE is above a speed threshold;

[0063] • when the UE has moved more than a distance;

[0064] • when the UE detects user activity of the UE;

[0065] • when a measurement of a downlink reference signal is below a signal threshold;

[0066] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0067] • when the UE fulfills a mobility event.

[0068] The radio network node is configured to receive from the UE, an indication requesting transmission of a synchronization signal; and to trigger a transmission based on the received indication.

[0069] Embodiments herein comprise one or more methods performed by a UE for requesting on- demand synchronization signal transmissions, such as SSB transmissions. Embodiments herein provide means for the UE to request from the radio network node, additional and / or adapted reference signal transmissions, e.g., on-demand SSB transmissions. Thus, embodiments herein provide an efficient communication in a wireless communication network.

[0070] BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Embodiments will now be described in more detail in relation to the enclosed drawings, in which: Fig. 1 is a schematic overview depicting a SSB structure according to prior art;

[0072] Fig. 2 shows an overview depicting a wireless communication network according to embodiments herein;

[0073] Fig. 3 is a combined flowchart and signaling scheme according to some embodiments herein; Fig. 4 is a schematic flowchart depicting a method performed by a UE according to embodiments herein;

[0074] Fig. 5 is a schematic flowchart depicting a method performed by a radio network node according to embodiments herein;

[0075] Fig. 6 is a combined flowchart and signaling scheme according to some embodiments herein; Fig. 7a shows an overview depicting the solution according to some embodiments herein;

[0076] Fig. 7b shows an overview depicting the solution according to some embodiments herein;

[0077] Fig. 7c shows an overview depicting the solution according to some embodiments herein;

[0078] Fig. 8 shows a block diagram depicting embodiments of a UE according to embodiments herein;

[0079] Fig. 9 shows a block diagram depicting embodiments of a radio network node according to embodiments herein;

[0080] Fig. 10 shows an example of a communication system QQ100 in accordance with some embodiments;

[0081] Fig. 11 shows a UE QQ200 in accordance with some embodiments;

[0082] Fig. 12 shows a network node QQ300 in accordance with some embodiments;

[0083] Fig. 13 is a block diagram of a host QQ400, which may be an embodiment of the host QQ116 of Fig. 10, in accordance with various aspects described herein;

[0084] Fig. 14 is a block diagram illustrating a virtualization environment QQ500 in which functions implemented by some embodiments may be virtualized; and

[0085] Fig. 15 shows a communication diagram of a host QQ602 communicating via a network node QQ604 with a UE QQ606 over a partially wireless connection in accordance with some embodiments.

[0086] DETAILED DESCRIPTION

[0087] Embodiments herein relate to wireless communication networks in general. Fig. 2 is a schematic overview depicting a wireless communication network 1. The wireless communication network 1 comprises one or more RANs and one or more CNs. The wireless communication network 1 may use one or a number of different technologies. Embodiments herein relate to recent technology trends that are of particular interest in a New Radio (NR) context, however, embodiments are also applicable in further development of existing wireless communications systems such as e.g. LTE or Wideband Code Division Multiple Access (WCDMA) or upcoming networks such as 6G.

[0088] In the wireless communication network 1 , one or more UEs such as a user equipment (UE) 10 exemplified herein as a wireless device such as a mobile station, a non-access point (non- AP) station (STA), a STA and / or a wireless terminal, are comprised communicating via e.g. one or more Access Networks (AN), e.g. radio access network (RAN), to one or more core networks (CN). It should be understood by the skilled in the art that “UE” is a non-limiting term which means any terminal, wireless communications terminal, user equipment, narrowband internet of things (NB- loT) device, Machine Type Communication (MTC) device, Device to Device (D2D) terminal, or node e.g. smart phone, laptop, mobile phone, sensor, relay, mobile tablets or even a small base station capable of communicating using radio communication with a radio network node within an area served by the radio network node.

[0089] The wireless communication network 1 comprises a first radio network node 12, providing radio coverage over a geographical area, a first service area 11 or first cell, of a first radio access technology (RAT), such as 6G, NR, LTE, or similar. The first radio network node 12 may be a transmission and reception point such as an access node, an access controller, a base station, A NG-RAN node, e.g. a radio base station such as a gNodeB (gNB), an evolved Node B (eNB, eNode B), a NodeB, a base transceiver station, a radio remote unit, an Access Point Base Station, a NG-RAN-CU-UP node, base station router, a Wireless Local Area Network (WLAN) access point or an Access Point Station (AP STA), a transmission arrangement of a radio base station, a stand-alone access point or any other network unit or node capable of communicating with a UE within the area served by the first radio network node depending e.g. on the first radio access technology and terminology used. The first radio network node may be referred to as a primary node, primary radio network node wherein the service area may be referred to as a primary serving cell, and the primary node communicates with the wireless device in form of DL transmissions to the wireless device and UL transmissions from the wireless device. It should be noted that a service area may be denoted as cell, beam, beam group or similar to define an area of radio coverage.

[0090] The wireless communication network 1 comprises a second radio network node 13, providing radio coverage over a geographical area, a second service area 14 or second cell, of a second radio access technology (RAT), such as 6G, NR, LTE, or similar. The second radio network node 13 may be a transmission and reception point such as an access node, an access controller, a base station, e.g. a radio base station such as a gNodeB (gNB), an evolved Node B (eNB, eNode B), a NodeB, a base transceiver station, a radio remote unit, a NG-RAN-CU-CP node, an Access Point Base Station, a base station router, a Wireless Local Area Network (WLAN) access point or an Access Point Station (AP STA), a transmission arrangement of a radio base station, a stand-alone access point or any other network unit or node capable of communicating with a wireless device within the area served by the second radio network node depending e.g. on the first radio access technology and terminology used. The second radio network node may be referred to as a secondary or secondary serving radio network node, wherein the service area may be referred to as a secondary cell or secondary serving cell, and the second radio network node communicates with the UE in form of DL transmissions to the UE and UL transmissions from the UE. It should be noted that a service area may be denoted as cell, beam, beam group or similar to define an area of radio coverage. The first RAT may be the same RAT as the second RAT or the first RAT may be a different RAT than the second RAT.

[0091] The wireless communication network 1 may further comprise a number of network nodes providing network functions (NF) or actually instantiations of NFs also referred to as NF instances, such as a first network node 15, for example, an AMF. The different NF instances may have different tasks. Other functions may be for LTE such as Mobility Management Entity (MME) or similar.

[0092] The respective node may be a standalone server, a cloud-implemented server, a distributed server or processing resources in a server farm or same node. Embodiments herein may be implemented as physical bare metal, virtual or cloud native such as Kubernetes environment in, e.g., hyper-cloud networks.

[0093] Embodiments herein relate to a UE for handling on-demand synchronization signal measurement, such as SSB measurement, and configuration from a radio network node 120 such as the first radio network node 12 or the second radio network node 13.

[0094] According to embodiments herein the UE 10 transmits to the radio network node 120, upon a condition fulfilled, an indication requesting transmission of a synchronization signal. The condition comprises one or more of the following:

[0095] • when a speed of the UE 10 is above a speed threshold;

[0096] • when the UE 10 has moved more than a distance;

[0097] • when the UE 10 detects user activity of the UE 10;

[0098] • when a measurement of a downlink reference signal is below a signal threshold;

[0099] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0100] • when the UE 10 fulfills a mobility event.

[0101] The UE 10 may transmit a request indication requesting a transmission of an SSB and / or adaptation of common signal / channel transmission. The radio network node 120 may then trigger a transmission based on the received indication.

[0102] Thus, it is herein provided means for the UE 10 to request synchronization signal on- demand. The UE 10 may request from the NW additional and / or adapted reference signal transmissions, e.g., on-demand SSB transmissions. Embodiments herein handle an efficient communication in a wireless communication network.

[0103] Examples of radio network nodes are NodeB, base station (BS), multi-standard radio (MSR) radio node such as MSR BS, eNodeB, gNodeB, MeNB, SeNB, location measurement unit (LMU), integrated access backhaul (IAB) node, network controller, radio network controller (RNC), base station controller (BSC), relay, donor node controlling relay, base transceiver station (BTS), Central Unit, e.g., in a gNB, Distributed Unit, e.g., in a gNB, Baseband Unit, Centralized Baseband, C-RAN, access point (AP), transmission points, transmission nodes, transmission reception point (TRP), RRU, RRH, nodes in distributed antenna system (DAS), core network node, e.g. MSC, MME etc, O&M, OSS, SON, positioning node, e.g., E-SMLC,etc.

[0104] The non-limiting term UE refers to any type of wireless device communicating with a network node and / or with another UE in a cellular or mobile communication system. Examples of UE are target device, device to device (D2D) UE, vehicular to vehicular (V2V), machine type UE, MTC UE or UE capable of machine to machine (M2M) communication, PDA, tablet, mobile terminals, smart phone, laptop embedded equipment (LEE), laptop mounted equipment (LME), USB dongles etc.

[0105] The term radio access technology, or RAT, may refer to any RAT e.g. UTRA, E-UTRA, narrow band internet of things (NB-loT), WiFi, Bluetooth, next generation RAT, 6G, New Radio (NR), 4G, 5G, etc. Any of the equipment denoted by the term node, network node or radio network node may be capable of supporting a single or multiple RATs.

[0106] The term signal or radio signal used herein can be any physical signal or physical channel. Examples of DL physical signals are reference signal (RS) such as PSS, SSS, channel state information (CSI)- reference signal (RS), demodulation reference signal (DMRS) signals in SS / PBCH block (SSB), discovery reference signal (DRS), cell reference signal (CRS), positioning reference signal (PRS) etc. RS may be periodic e.g. RS occasion carrying one or more RSs may occur with certain periodicity e.g. 20 ms, 40 ms etc. The RS may also be aperiodic. Each SSB carries NR-PSS, NR-SSS and NR-PBCH in 4 successive symbols. One or multiple SSBs are transmit in one SSB burst which is repeated with certain periodicity e.g. 5 ms, 10 ms, 20 ms, 40 ms, 80 ms and 160 ms. The UE is configured with information about SSB on cells of certain carrier frequency by one or more SS / PBCH block measurement timing configuration (SMTC) configurations. The SMTC configuration comprising parameters such as SMTC periodicity, SMTC occasion length in time or duration, SMTC time offset wrt reference time (e.g. serving cell’s SFN) etc. Therefore, SMTC occasion may also occur with certain periodicity e.g. 5 ms, 10 ms, 20 ms, 40 ms, 80 ms and 160 ms. Examples of UL physical signals are reference signal such as sounding reference signal (SRS), DMRS etc. The term physical channel refers to any channel carrying higher layer information e.g. data, control etc. Examples of physical channels are PBCH, narrowband physical broadcast channel (NPBCH), physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), shortened (s)PUCCH, sPDSCH, sPUCCH, sPUSCH, MTC (M)PDCCH, NPDCCH, NPDSCH, E-PDCCH, physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), NPUSCH etc.

[0107] The term Aperiodic-tracking reference signal (A-TRS) is a Rel-17 application of the CSI-RS for the UE measurement to settle the automatic gain control (AGC) during the secondary cell activation timeline. A-TRS can be typical non zero power (NZP) CSI-RS which follow the configuration from higher layer. The term time resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time. Examples of time resources are: symbol, time slot, subframe, radio frame, transmission time interval (TTI), interleaving time, slot, sub-slot, minislot, system frame number (SFN) cycle, hyper-SFN (H-SFN) cycle etc.

[0108] Fig. 3 is combined flowchart and signaling scheme according to some embodiments herein.

[0109] Action 301. The UE 10 may transmit a capability indication indicating capability of requesting a transmission of a synchronization signal, such as an SSB and / or adaptation of common signal / channel transmission.

[0110] Action 302. The radio network node 120, such as the second radio network node 13 or first radio network node 12, may transmit a configuration indication. The configuration indication may comprise a configuration or similar. The radio network node 120 may thus configure the UE 10 to request a transmission of a synchronization signal, such as an SSB and / or adaptation of common signal / channel transmission.

[0111] Action 303. The UE 10 may determine to transmit the request upon an event, or a condition, fulfilled.

[0112] Action 304. The UE 10 transmits to the radio network node 120, upon the condition being fulfilled, the indication requesting transmission of the synchronization signal. The condition comprises one or more of the following:

[0113] • when the speed of the UE 10 is above the speed threshold;

[0114] • when the UE 10 has moved more than the distance;

[0115] • when the UE 10 detects user activity of the UE 10;

[0116] • when the measurement of a downlink reference signal is below the signal threshold;

[0117] • when the time passed from the previously transmitted indication requesting transmission of the synchronization signal is above the time threshold; and

[0118] • when the UE 10 fulfills the mobility event.

[0119] The UE 10 may transmit, upon the condition being fulfilled, the request indication requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0120] Action 305. The radio network node 120 may then trigger a transmission based on the received indication.

[0121] Action 306. The UE 10 may then perform measurement on the synchronization signal, such as an SSB, as configured.

[0122] The method actions performed by the UE 10 for handling communication in the wireless communication network according to embodiments herein will now be described with reference to a flowchart depicted in Fig. 4. The actions do not have to be taken in the order stated below, but may be taken in any suitable order. Actions performed in some embodiments are marked with dashed boxes.

[0123] Action 401. The UE 10 may transmit to the radio network node 120, the capability indication indicating capability of requesting a transmission of a synchronization signal such as an SSB and / or adaptation of common signal and / or channel transmission.

[0124] Action 402. The UE 10 may receive the configuration indication. The configuration indication may comprise a configuration for requesting a transmission of a synchronization signal, such as an SSB and / or adaptation of common signal and / or channel transmission.

[0125] Action 403. The UE 10 may determine to transmit the request upon the condition being fulfilled such as an event fulfilled. Thus, the UE 10 may determine: that a speed of the UE 10 is above a speed threshold; that the UE 10 has moved more than a distance; the user activity of the UE 10 has be initiated; that a measurement of a downlink reference signal is below a signal threshold; that a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and / or that the UE 10 fulfills a mobility event.

[0126] Action 404. The UE 10 transmits to the radio network node 120, upon the condition fulfilled, the indication requesting transmission of the synchronization signal. The condition comprises one or more of the following:

[0127] • when a speed of the UE 10 is above a speed threshold;

[0128] • when the UE 10 has moved more than a distance;

[0129] • when the UE 10 detects user activity of the UE 10;

[0130] • when a measurement of a downlink reference signal is below a signal threshold;

[0131] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and

[0132] • when the UE 10 fulfills a mobility event.

[0133] The UE 10 may, when the condition is fulfilled, transmit the request indication requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0134] Action 405. The UE 10 may receive an activation indication informing the UE 10 about an upcoming on-demand synchronization signal transmission such as an SSB transmission.

[0135] Action 406. The UE 10 may then perform measurement on the synchronization signal, such as the SSB, for example, as indicated by the activation indication or as configured.

[0136] Embodiments introduce one or more on-demand SSB measurement relevant configurations targeting speeding up SSB measurement shortening Scell measurement delay.

[0137] Embodiments herein cover one or more of the following:

[0138] 1. A method in a UE for determining if / when to send “UE request”, the method comprising: a. Reporting to the NW a UE capability for “UE request”. b. Receiving “UE request” configuration from the NW related to one or more cells. c. Determining when / if to send “UE request” related to one or more cells d. Transmitting “UE request” “to the NW related to one or more cells.

[0139] 2. (UE request = on-demand synchronization signal request) The method in 1 wherein the “UE request” includes an “on-demand synchronization signal request”.

[0140] 3. (UE request = adaptation of common signal / channel request) The method in 1 wherein the “UE request” includes an “adaptation of common signal / channel request”. a. The common signal / channel is a synchronization signal. b. The common signal / channel is a paging occasion. c. The common signal / channel is a RACH.

[0141] 4. (Synchronization signal = 5G NR SSB signal) The method in 1,2 in where said synchronization signal is a 5G NR SSB signal.

[0142] 5. (Synchronization signal = 6G synchronization signal) The method in 1,2 where said synchronization signal is a 6G synchronization signal.

[0143] 6. (Cell = 5G NR SCell) The method in 1 — 5 where said “one or more cells” refers to one or more 5G NR SCells.

[0144] 7. (Cell = 6G cell) The method 1 — 5 where “one or more cells” refers to one or more 6G cells (note that in 6G cells may be defined differently and be more generic, e.g., as a configured collection of signals and channels).

[0145] 8. (Receiving DL transmission based on UE request) Receiving from the NW on- demand synchronization signal transmissions and / or adapted common signals / channels in one or more cells based on ”UE request”.

[0146] 9. (UE request for same cell) The “UE request” sent in a cell is for the cell in which the “UE request” was sent.

[0147] 10. (UE request for any other cell) The “UE request” sent in a cell is for any neighbor cell(s) on a specific carrier.

[0148] 11. (UE request for specific other cell) The “UE request” sent in a cell is for one or more specific neighbor cell(s) on a carrier

[0149] 12. (UE request when there is a user interaction) The “UE request” is transmitted, e.g., when it detects user activity such as touching / lifting the device, or about to start a certain service.

[0150] 13. (UE request when UE’s speed is above certain threshold). The “UE request” is transmitted when UE is moving faster than a specified limit.

[0151] 14. (UE request when UE has moved more than a certain distance). The “UE request” is transmitted in case the UE has moved more than a certain distance since its last position.

[0152] 15. (UE request when DL RS measurement is below some threshold) The “UE request” is transmitted when UE detects that coverage is poor, e.g., UE computes some metric based on a DL reference signal and determining that said metric is below a certain threshold. a. The metric is a reference signal received power (RSRP) value b. The metric is a Signal-To-lnterference-and-Noise Ratio (SINR) value. c. The metric is a Channel Quality Indicator (CQI) value.

[0153] 16. (UE request depending on quasi co location (QCL) relation) Determining whether to send “UE request” for cell depends on if cell has QCL relation with other cell or not.

[0154] 17. (UE request depending on time since last request) Determining whether additional SSBs are needed based on time passed since previous SSB transmissions (e.g., UE periodically sending “UE request”), and whether the previous sync or measurement result is up-to-date, based on e.g. time elapsed and UE movement or channel change rate.

[0155] 18. (UE request after waking up from long DRX cycle) Sending “UE request” when waking up from long DRX cycle.

[0156] 19. (UE request if DL RS transmissions are not aligned with or in vicinity of UEs DRX / paging cycle). Sending “UE request” if the currently provided DL RSs are not aligned with or in vicinity of UEs DRX / paging cycle.

[0157] 20. (UE request when UE leaves relaxed measurement mode). Sending “UE request” when UE leaves the relaxed measurement mode, where relaxed implies that measurements are performed more seldom than that of normal mode.

[0158] 21. (UE request depending on UL buffer status) Sending “UE request” if UL buffer size exceeds some threshold.

[0159] 22. (UE request sent together with UL buffer status report (BSR)) Sending “UE request” in conjunction with sending UL BSR.

[0160] 23. (UE request depending on measurement gaps) Sending “UE request” after it is configured with measurement gaps.

[0161] 24. (UE request depending on configuration of handover / conditional handover) Sending “UE request” for one or more target cells after it is configured with handover or conditional handover.

[0162] 25. (UE request depending on trigger for conditional handover) Sending “UE request” for one or more target cells when there is a trigger for a conditional handover.

[0163] 26. (UE request depending on mobility event) Sending “UE request” after it fulfills a mobility event and triggers an associated measurement report.

[0164] 27. (UE request upon Transmission Configuration Indication (TCI) state update) Sending “UE request” after it receives from the NW a TCI state update, i.e. , is configured with a new TCI state.

[0165] 28. (UE request upon antenna / panel update) Sending “UE request” after it changes physical antenna-port configuration, e.g., when switching panels. The method actions performed by the radio network node 120 for handling communication in the wireless communication network according to some embodiments herein will now be described with reference to a flowchart depicted in Fig. 5. The actions do not have to be taken in the order stated below, but may be taken in any suitable order. Actions performed in some embodiments are marked with dashed boxes.

[0166] Action 501. The radio network node 120 may receive from the UE 10, the capability indication indicating capability of requesting a transmission of a synchronization signal such as an SSB and / or adaptation of common signal / channel transmission.

[0167] Action 502. The radio network node 120 transmits to the UE 10, the configuration indication comprising the configuration for requesting the transmission of the synchronization signal, wherein the configuration comprises the condition to be fulfilled for requesting the transmission of a synchronization signal. The condition comprises one or more of the following:

[0168] • when a speed of the UE 10 is above the speed threshold;

[0169] • when the UE 10 has moved more than the distance;

[0170] • when the UE 10 detects user activity of the UE 10;

[0171] • when a measurement of a downlink reference signal is below the signal threshold;

[0172] • when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above the time threshold; and

[0173] • when the UE 10 fulfills the mobility event;

[0174] The configuration indication may comprise a configuration for requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0175] Action 503. The radio network node 120 receives the indication requesting transmission of the synchronization signal. The radio network node 120 may receive the request indication requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0176] Action 504. The radio network node 120 may trigger a transmission based on the received indication. The radio network node 120 may, for example, inform the UE 10 about an upcoming on- demand SSB transmission. The radio network node 120 may transmit the activation indication to the UE 10.

[0177] Action 505. The radio network node 120 performs a transmission based on the received indication such as the request indication.

[0178] It shall be noted that throughout the detailed description the term on-demand SSB is used for simplicity. However, the ideas are equally applicable to any other type of reference signals such as any newly defined reference signals beyond 5G used for time / frequency synchronization, RRM measurements, etc. Also, in the following, instead of requesting on-demand SSB transmission, the UE 10 may instead request update to common signal / channel transmission. Fig. 6 shows a flowchart summarizing the procedure of some of the embodiments for sending on-demand SSB based on on-demand SSB request:

[0179] In Action 61 , the UE 10 indicates support for on-demand SSB via UE capability signaling. In one embodiment, the UE 10 indicating support for on-demand SSB implies support for “on- demand SSB request”, i.e. , “on-demand SSB request” is a non-optional feature for on-demand SSB”. In an alternate embodiment, the UE 10 reports via additional UE capability support for “on- demand SSB request”, i.e., “on-demand SSB request” is an optional feature for on-demand SSB”. In one embodiment, the radio network node 120 advertises permission for on-demand SSB request on broadcast channel and already from Idle mode, upon connection setup, the UE 10 may report on-demand SSB request before the capability exchange.

[0180] In Action 62, the radio network node 120 may configure the UE 10 with on-demand SSB and, possibly, if it is an optional feature, “on-demand SSB request”.

[0181] In Action 63, the UE 10 sends “on-demand SSB request” to the radio network node 120. Embodiments herein disclose conditions / events that may trigger the UE 10 to send such “on- demand SSB request” to the radio network node 120.

[0182] In (optional) Action 64, the radio network node 120 sends “on-demand SSB activation” to the UE 10, which informs the UE 10 about an upcoming on-demand SSB transmission.

[0183] In Action 65, the radio network node 120 may send on-demand SSB.

[0184] In Action 66, the UE 10 performs measurements on on-demand SSB and reports said measurements to the radio network node 120.

[0185] In the above (and in the following), the following terminology is used:

[0186] • “On-demand SSB request”: Indication sent from the UE 10 to the NW or radio network node 120 for requesting / triggering on-demand SSB transmission from NW for various scenarios such as in one or more SCells. Details on “on-demand SSB request”- signaling / triggering are herein provided.

[0187] • “On-demand SSB activation”: Indication sent from the radio network node 120 to UE 10 to inform the UE 10 about an upcoming on-demand SSB transmission.

[0188] One example of a UE requesting on-demand SSB transmission is shown in Fig. 7a and 7b. Here, the UE 10 is configured with three serving cells with one primary cell (PCell) / secondary cell (SCell) being activated and two SCells being configured but not activated (i.e., deactivated). In this example, the UE 10 detects that channel associated with active PCell / SCell is, e.g., associated with a poor link budget and / or is not expected to meet future traffic demands, e.g., determined based on UL buffer status. Therefore, as shown in Fig. 7a, the UE 10 sends “on-demand SSB request” to the radio network node 120, requesting on-demand SSB transmissions in configured / deactivated SCells. After receiving said “on-demand SSB request”, the radio network node 120 performs on-demand SSB transmissions in configured / deactivated SCells, as shown in Fig. 7b, which enables the UE 10 to perform on-demand SSB measurements on said configured / deactivated SCells. Based on said on-demand SSB transmissions, the radio network node 120 may choose to activate on or more of the configured / deactivated SCells. Thus, Fig. 7a shows that the UE 10 may send “on-demand SSB request” to active PCell / SCell based on which radio network node 120 may transmit on-demand SSB in one or more configured SCells, e.g., that may or may not be activated and that may or may not be collocated with active PCell / SCell. In this example, configured SCells are deactivated and non-collocated with active PCell / SCell. Fig. 7b shows that the radio network node 120 transmits on-demand SSB in configured SCell after receiving an “on-demand SSB request” in active PCell / SCell.

[0189] The above example is equally applicable to non-carrier-aggregation scenarios. For example, the UE may be connected to a serving cell but based on excessive channel fluctuations ask the serving cell for on-demand SSBs provision on the serving cell itself and / or one or more neighbor cells. When it comes to neighbor cells, the serving cell may then ask the neighbors via backhaul to provide SSBs. The level of channel fluctuations above which the UE 10 may ask for on-demand SSB may be internally defined in the UE 10 or, in one embodiment, be configurable by the radio network node 120. The UE 10 may further ask for specific carriers and / or cells on which on-demand SSB is desired. The UE 10 may have historical information related to historical coverage issues in a certain area, e.g., within a certain cell or within a certain beam of the cell, and potential candidates that may be suitable for handover.

[0190] The UE 10 may have been configured with various criteria and been permitted to ask for on-demand SSBs upon criteria fulfillment. An example of such criterion may be based on RRM type of measurement events, e.g. when an inter-frequency cell becomes better than a certain threshold, whereupon the UE 10 may then ask for on-demand SSB on cells of that carrier, or, e.g., when the serving cell quality drops below a certain threshold, etc. Other examples may be positioning-based such that the UE 10 may ask for on-demand SSB if the UE’s speed is above certain speed threshold, or in case the UE 10 has moved more than a certain distance since its last position. Further examples of scenarios and triggers are defined in upcoming sections. Combinations of the exemplified criteria and / or scenarios are not precluded.

[0191] In some scenarios, implementations, or NW configurations, the UE 10 may determine autonomously whether to request on-demand SSBs. This may apply, e.g., in situations where the is no specification guidance or when the NW has not configured any guidance rules, or if rules configured by the NW allowing request transmission are satisfied but it is left up to the UE 10 whether or not to send the request.

[0192] In one embodiment, the UE 10 requests on-demand SSBs when the UE 10 detects user activity, such as touching, lifting, and / or moving the device, or when the user is about to start and / or initiating a certain service.

[0193] Channel conditions In one embodiment, the UE 10 may request on-demand SSBs when it detects movement of the UE, where the range or the speed of movement exceeds a threshold. The movement range or speed may be estimated by evaluating channel changes, using Inertial Measurement Unit (IMU) output, etc.

[0194] In one embodiment, the UE 10 may request on-demand SSB if the UE 10 detects that coverage is poor, e.g., UE measures SSB or some other DL RS in an activated cell, and determines that additional SSB would allow improved synchronization quality, measurement quality, etc., and / or that the synchronization or measurement procedures may be sped up by having additional SSBs available in a condensed time interval.

[0195] Whether or not to request on-demand SSB may also depend on whether the SCell has QCL relation with the PCell or not. The UE 10 may determine whether SCell SSB and PCell SSB- based measurements are consistent with an QCL assumption. If so, the UE 10 may use PCell SSB for SCell link quality and synchronization acquisition. If not, the UE 10 may request additional SSBs for the SCell.

[0196] Staleness of previous measurements

[0197] In one embodiment, the UE 10 may determine whether additional SSBs are needed based on time passed since previous SSB transmissions, and whether the previous synchronization or measurement result is up-to-date, based on e.g. time elapsed and UE movement or channel change rate. If the time elapsed is above a time threshold, optionally in relation to other scenario characteristics, the UE 10 may request on-demand SSBs to obtain up-to-date synchronization or measurement results, and optionally report to the radio network node 120.

[0198] UE energy savings

[0199] In one embodiment, the UE 10 may request on-demand SSB when waking up from a long DRX cycle. In another embodiment, the UE 10 may request on-demand SSBs such that they are aligned with in vicinity of UEs DRX ON time. The DRX may here be referring to any of connected mode C-DRX onDuration or PO monitoring activity. The UE 10 may either ask for additional SSBs that are close and / or aligned with the DRX or provide assistance for offsetting the existing SSB transmissions such that they are close and / or aligned with the DRX active period. In this embodiment, the UE 10 may then receive reference signals that are aligned and / or closer to the DRX active period compared to if the UE 10 had not requested it.

[0200] In another embodiment, the UE 10 may be operating in Relaxed Measurement mode for the sake of energy savings meaning that the UE 10 is performing measurements on neighbor cells at a reduced rate or not measuring at all depending on whether the UE 10 is not at cell edge, in low mobility, or stationary, see 3GPP 38.331 Rel-18 (v.18.0.0) for reference. Upon exiting such a state, the UE 10 may then ask for on-demand reference signal provision on one or more cells.

[0201] UE traffic status In one embodiment, the UE 10 may request on-demand SSB to support fast SCell activation to facilitate pending UL data transfer. The UE 10 may request the SSB if its UL buffer size exceeds a threshold, where the threshold may be based on whether the buffer will be emptied before the SCell activation procedure is complete or whether sufficient data remains to be transmitted via the SCell. The activation time duration may be estimated based on previous activation instances, see Fig. 7c. The UE 10 may send an on-demand SSB request in conjunction with sending UL buffer status report (BSR) to the radio network node 120.

[0202] Radio Link failure / Beam failure

[0203] In another embodiment, when the UE 10 detects that the channel quality is worse or UE moves from the cell center to the cell edge, the UE 10 may determine to send the ‘on-demand SSB request’. The evaluation can be based on an absolute threshold or relative threshold.

[0204] For example, the quality status evaluation can be determined based on parameters, such as T1 , Pref, Pthres, and / or Tthres, which are configured by the NW. In time interval T1 , UE evaluates its serving cell quality as P1. If Pref- P1> Pthres for Tthres, UE will determine to send the ‘on-demand SSB request’.

[0205] For example, the quality status evaluation can be determined based on parameters, such as T1 , T2, Pthres and / or Pthres_hyst, which are configured by NW. In time interval T1, UE 10 evaluates its serving cell quality as P1. At time interval T2, the UE 10 evaluates its serving cell quality as P2. If P1-P2> Pthres+ Pthres_hyst, then the UE 10 will send the ‘on-demand SSB request’ to radio network node 120. The serving cell quality can be evaluated based on L1-RSRP, L3-RSRP, or reference signal received quality (RSRQ), SI NR.

[0206] In another embodiment, when the UE 10 detects the high mobility status, the UE 10 may send the ‘on-demand SSB request’. For example, the mobility status can be determined based on the parameters (Tmobiiity_max, Nmobiiity, and Tmobiiity_Hyst) which configured by NW. If number of serving cell change, e.g. handover or cell reselections, during time period Tmobiiity_max is greater than Nmobiiity, UE determines to send the ‘on-demand SSB request’.

[0207] Mobility-related

[0208] In another embodiment UE 10 requests on-demand SSB after it is configured with measurement gaps.

[0209] In another embodiment UE 10 requests on-demand SSB on one or more target cells after it is configured with handover or conditional handover (CHO). In a sub-embodiment, the UE 10 may instead of requesting SSBs already upon configuration of the CHO, wait until a trigger of the CHO condition such as upon reception of the NES-specific CHO execution indicator (“NES-mode indication”) of Downlink Control Information (DCI) 2_9 or alike.

[0210] In another embodiment the UE 10 requests on-demand SSB after it fulfills a mobility event and triggers an associated measurement report. In one embodiment, the UE 10 may in certain locations, optionally in conjunction with certain channel conditions of serving cell such as channel quality deterioration more than a certain level, ask for specific carriers and / or cells on which on-demand SSB is desired. The UE 10 may have historical information related to coverage issues in a certain area, e.g., within a certain cell or within a certain beam of the cell, and potential candidates that may be suitable for handover.

[0211] In another embodiment, the UE 10 may ask for on-demand reference signals when it is moving faster than a certain level or speed threshold. For example, when the UE 10 is static, i.e. , not moving, or moving with a speed below say 3km / h, a slow rate SSB transmission from the NW suffices for mobility RRM measurements for, e.g., cell reselection purposes. But when the UE 10 starts moving faster than say 3km / h a certain reference signal provision rate is requested, when moving faster than 50 km / h and 300 km / h respectively other provision rates or reference signal characteristics are requested from the serving and / or neighboring cells. Such triggers for requesting on-demand reference signals may also be based on movement, i.e. based on distance from last position where the current SSB provision rate sufficed. The on-demand synchronization signal request is, for example, transmitted in case the UE 10 has moved more than a certain distance, either horizontal or vertical, since its last position. For example, the UE 10 may have been on a first floor of a building and content with the SSBs provided by the NW only in beams that are tilted and covering the first floor, while as the UE 10 starts moving towards higher floors more / other SSBs are requested from the NW covering those areas.

[0212] Multi-antenna related

[0213] In one embodiment, the UE 10 requests on-demand SSB in an SCell after it has received a TCI state, i.e., NW updates NWs Tx and / or Rx spatial filter, e.g., Discrete Fourier Transform (DFT) beam, and / or UE’s Tx and / or Rx spatial filter, e.g., panel in frequency range two (FR2), update in same or different SCell.

[0214] In one embodiment, the UE 10 may request on-demand SSB after the UE 10 has switched which physical antenna ports is connected to its digital processing unit / baseband unit, e.g., after switching panel in FR2. UE switching physical antenna ports, in some embodiments, means that the UE 10 changes the association between SRS ports and physical antenna ports and / or changes the physical antenna ports on which it receives a DL RS, e.g., SSB, transmission. Reasons for the UE 10 switching antenna ports may include but are not limited to UE panel overheating or due to Maximum Power Reduction (MPR) differences between panels, e.g., when one panel is facing a human body.

[0215] Note that UE mapping physical antenna ports, e.g., panel, to digital unit and / or baseband unit is up to UE implementation and transparent to the NW. Further note that, e.g., beam selection and / or SCell activation based on a previous SSB transmission may be suboptimal after the UE 10 has updated physical-antenna port mapping, which may encourage the UE 10 to request on- demand SSB. Fig. 8 is a block diagram depicting the UE 10 for handling communication in the wireless communication network 1 according to embodiments herein.

[0216] The UE 10 may comprise processing circuitry 801 , e.g., one or more processors, configured to perform the methods herein.

[0217] The UE 10 and / or the processing circuitry 801 is configured to, upon the condition fulfilled, transmit to the radio network node 120, the indication requesting transmission of the synchronization signal. The condition comprises one or more of the following:

[0218] • when the speed of the UE 10 is above the speed threshold;

[0219] • when the UE 10 has moved more than the distance;

[0220] • when the UE 10 detects user activity of the UE 10;

[0221] • when the measurement of the downlink reference signal is below the signal threshold;

[0222] • when the time passed from a previously transmitted indication requesting transmission of a synchronization signal is above the time threshold; and

[0223] • when the UE 10 fulfills the mobility event.

[0224] The UE 10 and / or the processing circuitry 801 may be configured to transmit to the radio network node 120, the capability indication indicating capability of requesting the transmission of a synchronization signal.

[0225] The UE 10 and / or the processing circuitry 801 may be configured to receive the configuration indication comprising the configuration for requesting the transmission of the synchronization signal.

[0226] The UE 10 and / or the processing circuitry 801 may be configured to determine to transmit the request when the condition fulfilled.

[0227] The UE 10 and / or the processing circuitry 801 may be configured to perform the measurement on the synchronization signal.

[0228] The UE 10 and / or the processing circuitry 801 may be configured to transmit the request indication requesting the transmission of an SSB and / or adaptation of common signal / channel transmission.

[0229] The UE 10 and / or the processing circuitry 801 may be configured to transmit to the radio network node 120, the capability indication indicating capability of requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0230] The UE 10 and / or the processing circuitry 801 may be configured to receive the configuration indication. The configuration indication may comprise a configuration for requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0231] The UE 10 and / or the processing circuitry 801 may be configured to determine to transmit the request upon an event or a condition fulfilled. The UE 10 and / or the processing circuitry 801 may be configured to perform measurement on the SSB as configured.

[0232] The UE 10 may comprise a memory 805. The memory 805 comprises one or more units to be used to store data on, such as data packets, indications, SSB information, common signal / channel information, reference signal information, assistance information, application information, messages, measurement, events and applications to perform the methods disclosed herein when being executed, and similar. Furthermore, the UE 10 may comprise a communication interface 806 such as comprising a transmitter, a receiver, a transceiver and / or one or more antennas.

[0233] The methods according to the embodiments described herein for the UE 10 are respectively implemented by means of e.g. a computer program product 807 or a computer program, comprising instructions, i.e. , software code portions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the UE 10. The computer program product 807 may be stored on a computer- readable storage medium 808, e.g., a disc, a universal serial bus (USB) stick or similar. The computer-readable storage medium 808, having stored thereon the computer program product, may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the UE 10. In some embodiments, the computer-readable storage medium may be a transitory or a non-transitory computer-readable storage medium. Thus, embodiments herein may disclose the UE for handling communication in a wireless communication network, wherein UE comprises processing circuitry and a memory, said memory comprising instructions executable by said processing circuitry whereby said UE is operative to perform any of the methods herein.

[0234] Fig. 9 is a block diagram depicting the radio network node 120 for handling communication in the wireless communication network 1 according to embodiments herein.

[0235] The radio network node 120 may comprise processing circuitry 901 , e.g., one or more processors, configured to perform the methods herein.

[0236] The radio network node 120 and / or the processing circuitry 901 is configured to transmit to the UE 10, the configuration indication comprising the configuration for requesting the transmission of a synchronization signal. The configuration comprises the condition to be fulfilled for requesting the transmission of a synchronization signal, wherein the condition comprises one or more of the following:

[0237] • when the speed of the UE 10 is above the speed threshold;

[0238] • when the UE 10 has moved more than the distance;

[0239] • when the UE 10 detects user activity of the UE 10;

[0240] • when the measurement of a downlink reference signal is below the signal threshold; • when the time passed from a previously transmitted indication requesting transmission of a synchronization signal is above the time threshold; and

[0241] • when the UE 10 fulfills the mobility event.

[0242] The radio network node 120 and / or the processing circuitry 901 is configured to receive from the UE 10, the indication requesting transmission of a synchronization signal.

[0243] The radio network node 120 and / or the processing circuitry 901 is configured to trigger the transmission based on the received indication.

[0244] The radio network node 120 and / or the processing circuitry 901 may be configured to receive from the UE, the capability indication indicating capability of requesting the transmission of a synchronization signal.

[0245] The radio network node 120 and / or the processing circuitry 901 may be configured to receive the request indication requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0246] The radio network node 120 and / or the processing circuitry 901 is configured to trigger a transmission based on the received request indication.

[0247] The radio network node 120 and / or the processing circuitry 901 may be configured to receive from the UE 10, the capability indication indicating capability of requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0248] The radio network node 120 and / or the processing circuitry 901 may be configured to transmit the configuration indication. The configuration indication may comprise a configuration for requesting a transmission of an SSB and / or adaptation of common signal / channel transmission.

[0249] The radio network node 120 may comprise a memory 905. The memory 905 comprises one or more units to be used to store data on, such as data packets, indications, SSB information, common signal / channel information, reference signal information, assistance information, application information, messages, measurement, events and applications to perform the methods disclosed herein when being executed, and similar. Furthermore, the radio network node 120 may comprise a communication interface 906 such as comprising a transmitter, a receiver, a transceiver and / or one or more antennas.

[0250] The methods according to the embodiments described herein for the radio network node 120 are respectively implemented by means of e.g. a computer program product 907 or a computer program, comprising instructions, i.e. , software code portions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the radio network node 120. The computer program product 907 may be stored on a computer-readable storage medium 908, e g., a disc, a universal serial bus (USB) stick or similar. The computer-readable storage medium 908, having stored thereon the computer program product, may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the radio network node 120. In some embodiments, the computer-readable storage medium may be a transitory or a non-transitory computer-readable storage medium. Thus, embodiments herein may disclose the radio network node for handling communication in a wireless communication network, wherein radio network node comprises processing circuitry and a memory, said memory comprising instructions executable by said processing circuitry whereby said radio network node is operative to perform any of the methods herein.

[0251] In some embodiments a more general term “network node” or “radio network node” is used and it can correspond to any type of radio-network node or any network node, which communicates with a UE and / or with another network node.

[0252] In some embodiments the non-limiting term wireless device or user equipment (UE) is used and it refers to any type of wireless device communicating with a network node and / or with another wireless device in a cellular or mobile communication system. Examples of UE are target device, device to device (D2D) UE, proximity capable UE (aka ProSe UE), loT capable device, machine type UE or UE capable of machine to machine (M2M) communication, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles etc.

[0253] As will be readily understood by those familiar with communications design, that functions means or circuits may be implemented using digital logic and / or one or more microcontrollers, microprocessors, or other digital hardware. In some embodiments, several or all of the various functions may be implemented together, such as in a single application-specific integrated circuit (ASIC), or in two or more separate devices with appropriate hardware and / or software interfaces between them. Several of the functions may be implemented on a processor shared with other functional components of a wireless device or network node, for example.

[0254] Alternatively, several of the functional elements of the processing means discussed may be provided through the use of dedicated hardware, while others are provided with hardware for executing software, in association with the appropriate software or firmware. Thus, the term “processor” or “controller” as used herein does not exclusively refer to hardware capable of executing software and may implicitly include, without limitation, digital signal processor (DSP) hardware and / or program or application data. Other hardware, conventional and / or custom, may also be included. Designers of communications devices will appreciate the cost, performance, and maintenance trade-offs inherent in these design choices.

[0255] Any appropriate steps, methods, features, functions, or benefits disclosed herein may be performed through one or more functional units or modules of one or more virtual apparatuses. Each virtual apparatus may comprise a number of these functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessor or microcontrollers, as well as other digital hardware, which may include digital signal processors (DSPs), special-purpose digital logic, and the like. The processing circuitry may be configured to execute program code stored in memory, which may include one or several types of memory such as read-only memory (ROM), random-access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. Program code stored in memory includes program instructions for executing one or more telecommunications and / or data communications protocols as well as instructions for carrying out one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure.

[0256] Fig. 10 shows an example of a communication system QQ100 in accordance with some embodiments.

[0257] In the example, the communication system QQ100 includes a telecommunication network QQ102 that includes an access network QQ104, such as a radio access network (RAN), and a core network QQ106, which includes one or more core network nodes QQ108. The access network QQ104 includes one or more access network nodes, such as network nodes QQ110a and QQ110b (one or more of which may be generally referred to as network nodes QQ110) being examples of the first radio network node 12 and second radio network node 13, or any other similar 3rd Generation Partnership Project (3GPP) access nodes or non-3GPP access points. Moreover, as will be appreciated by those of skill in the art, a network node, being examples of the entities herein, is not necessarily limited to an implementation in which a radio portion and a baseband portion are supplied and integrated by a single vendor. Thus, it will be understood that network nodes include disaggregated implementations or portions thereof. For example, in some embodiments, the telecommunication network QQ102 includes one or more Open-RAN (ORAN) network nodes. An ORAN network node is a node in the telecommunication network QQ102 that supports an ORAN specification (e.g., a specification published by the O-RAN Alliance, or any similar organization) and may operate alone or together with other nodes to implement one or more functionalities of any node in the telecommunication network QQ102, including one or more network nodes QQ110 and / or core network nodes QQ108.

[0258] Examples of an ORAN network node include an open radio unit (0-Rll), an open distributed unit (0-Dll), an open central unit (O-CU), including an O-CU control plane (O-CU-CP) or an O-CU user plane (O-CU-UP), a RAN intelligent controller (near-real time or non-real time) hosting software or software plug-ins, such as a near-real time control application (e.g., xApp) or a non-real time control application (e.g., rApp), or any combination thereof (the adjective “open” designating support of an ORAN specification). The network node may support a specification by, for example, supporting an interface defined by the ORAN specification, such as an A1 , F1 , W1, E1 , E2, X2, Xn interface, an open fronthaul user plane interface, or an open fronthaul management plane interface. Moreover, an ORAN access node may be a logical node in a physical node. Furthermore, an ORAN network node may be implemented in a virtualization environment (described further below) in which one or more network functions are virtualized. For example, the virtualization environment may include an O-Cloud computing platform orchestrated by a Service Management and Orchestration Framework via an 0-2 interface defined by the O-RAN Alliance or comparable technologies. The network nodes QQ110 facilitate direct or indirect connection of the user equipment (UE) 10, such as by connecting UEs QQ112a, QQ112b, QQ112c, and QQ112d (one or more of which may be generally referred to as UEs QQ112) to the core network QQ106 over one or more wireless connections.

[0259] Example wireless communications over a wireless connection include transmitting and / or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and / or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors. Moreover, in different embodiments, the communication system QQ100 may include any number of wired or wireless networks, network nodes, UEs, and / or any other components or systems that may facilitate or participate in the communication of data and / or signals whether via wired or wireless connections. The communication system QQ100 may include and / or interface with any type of communication, telecommunication, data, cellular, radio network, and / or other similar type of system.

[0260] The UEs QQ112 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and / or operable to communicate wirelessly with the network nodes QQ110 and other communication devices. Similarly, the network nodes QQ110 are arranged, capable, configured, and / or operable to communicate directly or indirectly with the UEs QQ112 and / or with other network nodes or equipment in the telecommunication network QQ102 to enable and / or provide network access, such as wireless network access, and / or to perform other functions, such as administration in the telecommunication network QQ102.

[0261] In the depicted example, the core network QQ106 connects the network nodes QQ110 to one or more hosts, such as host QQ116. These connections may be direct or indirect via one or more intermediary networks or devices. In other examples, network nodes may be directly coupled to hosts. The core network QQ106 includes one more core network nodes (e.g., core network node QQ108) such as network node 15 that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and / or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node QQ108. Example core network nodes include functions of one or more of a Mobile Switching Center (MSC), Mobility Management Entity (MME), Home Subscriber Server (HSS), Access and Mobility Management Function (AMF), Session Management Function (SMF), Authentication Server Function (AUSF), Subscription Identifier De-concealing function (SIDF), Unified Data Management (UDM), Security Edge Protection Proxy (SEPP), Network Exposure Function (NEF), and / or a User Plane Function (UPF). The host QQ116 may be under the ownership or control of a service provider other than an operator or provider of the access network QQ104 and / or the telecommunication network QQ102, and may be operated by the service provider or on behalf of the service provider. The host QQ116 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio / video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server.

[0262] As a whole, the communication system QQ100 of Fig. 10 enables connectivity between the UEs, network nodes, and hosts. In that sense, the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM); Universal Mobile Telecommunications System (UMTS); Long Term Evolution (LTE), and / or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G); wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi); and / or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, and / or any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox.

[0263] In some examples, the telecommunication network QQ102 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network QQ102 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network QQ102. For example, the telecommunications network QQ102 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and / or Massive Machine Type Communication (mMTC) / Massive loT services to yet further UEs.

[0264] In some examples, the UEs QQ112 are configured to transmit and / or receive information without direct human interaction. For instance, a UE may be designed to transmit information to the access network QQ104 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the access network QQ104. Additionally, a UE may be configured for operating in single- or multi-RAT or multi-standard mode. For example, a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e. being configured for multi-radio dual connectivity (MR-DC), such as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) New Radio - Dual Connectivity (EN-DC).

[0265] In the example, the hub QQ114 communicates with the access network QQ104 to facilitate indirect communication between one or more UEs (e.g., UE QQ112c and / or QQ112d) and network nodes (e.g., network node QQ110b). In some examples, the hub QQ114 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs. For example, the hub QQ114 may be a broadband router enabling access to the core network QQ106 for the UEs. As another example, the hub QQ114 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes QQ110, or by executable code, script, process, or other instructions in the hub QQ114. As another example, the hub QQ114 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data. As another example, the hub QQ114 may be a content source. For example, for a UE that is a VR headset, display, loudspeaker or other media delivery device, the hub QQ114 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub QQ114 then provides to the UE either directly, after performing local processing, and / or after adding additional local content. In still another example, the hub QQ114 acts as a proxy server or orchestrator for the UEs, in particular if one or more of the UEs are low energy loT devices.

[0266] The hub QQ114 may have a constant / persistent or intermittent connection to the network node QQ110b. The hub QQ114 may also allow for a different communication scheme and / or schedule between the hub QQ114 and UEs (e.g., UE QQ112c and / or QQ112d), and between the hub QQ114 and the core network QQ106. In other examples, the hub QQ114 is connected to the core network QQ106 and / or one or more UEs via a wired connection. Moreover, the hub QQ114 may be configured to connect to an M2M service provider over the access network QQ104 and / or to another UE over a direct connection. In some scenarios, UEs may establish a wireless connection with the network nodes QQ110 while still connected via the hub QQ114 via a wired or wireless connection. In some embodiments, the hub QQ114 may be a dedicated hub - that is, a hub whose primary function is to route communications to / from the UEs from / to the network node QQ110b. In other embodiments, the hub QQ114 may be a non-dedicated hub - that is, a device which is capable of operating to route communications between the UEs and network node QQ110b, but which is additionally capable of operating as a communication start and / or end point for certain data channels.

[0267] Fig. 11 shows a UE QQ200 in accordance with some embodiments. As used herein, a UE refers to a device capable, configured, arranged and / or operable to communicate wirelessly with network nodes and / or other UEs. Examples of a UE include, but are not limited to, a smart phone, mobile phone, cell phone, voice over IP (VoIP) phone, wireless local loop phone, desktop computer, personal digital assistant (PDA), wireless cameras, gaming console or device, music storage device, playback appliance, wearable terminal device, wireless endpoint, mobile station, tablet, laptop, laptop-embedded equipment (LEE), laptop-mounted equipment (LME), smart device, wireless customer-premise equipment (CPE), vehicle, vehicle-mounted or vehicle embedded / integrated wireless device, etc. Other examples include any UE identified by the 3rd Generation Partnership Project (3GPP), including a narrow band internet of things (NB-loT) UE, a machine type communication (MTC) UE, and / or an enhanced MTC (eMTC) UE.

[0268] A UE may support device-to-device (D2D) communication, for example by implementing a 3GPP standard for sidelink communication, Dedicated Short-Range Communication (DSRC), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), or vehicle-to-everything (V2X). In other examples, a UE may not necessarily have a user in the sense of a human user who owns and / or operates the relevant device. Instead, a UE may represent a device that is intended for sale to, or operation by, a human user but which may not, or which may not initially, be associated with a specific human user (e.g., a smart sprinkler controller). Alternatively, a UE may represent a device that is not intended for sale to, or operation by, an end user but which may be associated with or operated for the benefit of a user (e.g., a smart power meter).

[0269] The UE QQ200 includes processing circuitry QQ202 that is operatively coupled via a bus QQ204 to an input / output interface QQ206, a power source QQ208, a memory QQ210, a communication interface QQ212, and / or any other component, or any combination thereof. Certain UEs may utilize all or a subset of the components shown in Figure 11. The level of integration between the components may vary from one UE to another UE. Further, certain UEs may contain multiple instances of a component, such as multiple processors, memories, transceivers, transmitters, receivers, etc.

[0270] The processing circuitry QQ202 is configured to process instructions and data and may be configured to implement any sequential state machine operative to execute instructions stored as machine-readable computer programs in the memory QQ210. The processing circuitry QQ202 may be implemented as one or more hardware-implemented state machines (e.g., in discrete logic, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), etc.); programmable logic together with appropriate firmware; one or more stored computer programs, general-purpose processors, such as a microprocessor or digital signal processor (DSP), together with appropriate software; or any combination of the above. For example, the processing circuitry QQ202 may include multiple central processing units (CPUs).

[0271] In the example, the input / output interface QQ206 may be configured to provide an interface or interfaces to an input device, output device, or one or more input and / or output devices. Examples of an output device include a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, an emitter, a smartcard, another output device, or any combination thereof. An input device may allow a user to capture information into the UE QQ200. Examples of an input device include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smartcard, and the like. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from a user. A sensor may be, for instance, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, an optical sensor, a proximity sensor, a biometric sensor, etc., or any combination thereof. An output device may use the same type of interface port as an input device. For example, a Universal Serial Bus (USB) port may be used to provide an input device and an output device.

[0272] In some embodiments, the power source QQ208 is structured as a battery or battery pack. Other types of power sources, such as an external power source (e.g., an electricity outlet), photovoltaic device, or power cell, may be used. The power source QQ208 may further include power circuitry for delivering power from the power source QQ208 itself, and / or an external power source, to the various parts of the UE QQ200 via input circuitry or an interface such as an electrical power cable. Delivering power may be, for example, for charging of the power source QQ208. Power circuitry may perform any formatting, converting, or other modification to the power from the power source QQ208 to make the power suitable for the respective components of the UE QQ200 to which power is supplied.

[0273] The memory QQ210 may be or be configured to include memory such as random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, hard disks, removable cartridges, flash drives, and so forth. In one example, the memory QQ210 includes one or more application programs QQ214, such as an operating system, web browser application, a widget, gadget engine, or other application, and corresponding data QQ216. The memory QQ210 may store, for use by the UE QQ200, any of a variety of various operating systems or combinations of operating systems.

[0274] The memory QQ210 may be configured to include a number of physical drive units, such as redundant array of independent disks (RAID), flash memory, USB flash drive, external hard disk drive, thumb drive, pen drive, key drive, high-density digital versatile disc (HD-DVD) optical disc drive, internal hard disk drive, Blu-Ray optical disc drive, holographic digital data storage (HDDS) optical disc drive, external mini-dual in-line memory module (DIMM), synchronous dynamic random access memory (SDRAM), external micro-DIMM SDRAM, smartcard memory such as tamper resistant module in the form of a universal integrated circuit card (UICC) including one or more subscriber identity modules (SIMs), such as a USIM and / or ISIM, other memory, or any combination thereof. The UICC may for example be an embedded UICC (eUlCC), integrated UICC (iUICC) or a removable UICC commonly known as ‘SIM card.’ The memory QQ210 may allow the UE QQ200 to access instructions, application programs and the like, stored on transitory or non- transitory memory media, to off-load data, or to upload data. An article of manufacture, such as one utilizing a communication system may be tangibly embodied as or in the memory QQ210, which may be or comprise a device-readable storage medium.

[0275] The processing circuitry QQ202 may be configured to communicate with an access network or other network using the communication interface QQ212. The communication interface QQ212 may comprise one or more communication subsystems and may include or be communicatively coupled to an antenna QQ222. The communication interface QQ212 may include one or more transceivers used to communicate, such as by communicating with one or more remote transceivers of another device capable of wireless communication (e.g., another UE or a network node in an access network). Each transceiver may include a transmitter QQ218 and / or a receiver QQ220 appropriate to provide network communications (e.g., optical, electrical, frequency allocations, and so forth). Moreover, the transmitter QQ218 and receiver QQ220 may be coupled to one or more antennas (e.g., antenna QQ222) and may share circuit components, software or firmware, or alternatively be implemented separately.

[0276] In the illustrated embodiment, communication functions of the communication interface QQ212 may include cellular communication, Wi-Fi communication, LPWAN communication, data communication, voice communication, multimedia communication, short-range communications such as Bluetooth, near-field communication, location-based communication such as the use of the global positioning system (GPS) to determine a location, another like communication function, or any combination thereof. Communications may be implemented in according to one or more communication protocols and / or standards, such as IEEE 802.11 , Code Division Multiplexing Access (CDMA), Wideband Code Division Multiple Access (WCDMA), GSM, LTE, New Radio (NR), UMTS, WiMax, Ethernet, transmission control protocol / internet protocol (TCP / IP), synchronous optical networking (SONET), Asynchronous Transfer Mode (ATM), QUIC, Hypertext Transfer Protocol (HTTP), and so forth.

[0277] Regardless of the type of sensor, a UE may provide an output of data captured by its sensors, through its communication interface QQ212, via a wireless connection to a network node. Data captured by sensors of a UE can be communicated through a wireless connection to a network node via another UE. The output may be periodic (e.g., once every 15 minutes if it reports the sensed temperature), random (e.g., to even out the load from reporting from several sensors), in response to a triggering event (e.g., when moisture is detected an alert is sent), in response to a request (e.g., a user initiated request), or a continuous stream (e.g., a live video feed of a patient).

[0278] As another example, a UE comprises an actuator, a motor, or a switch, related to a communication interface configured to receive wireless input from a network node via a wireless connection. In response to the received wireless input the states of the actuator, the motor, or the switch may change. For example, the UE may comprise a motor that adjusts the control surfaces or rotors of a drone in flight according to the received input or to a robotic arm performing a medical procedure according to the received input.

[0279] A UE, when in the form of an Internet of Things (loT) device, may be a device for use in one or more application domains, these domains comprising, but not limited to, city wearable technology, extended industrial application and healthcare. Non-limiting examples of such an loT device are a device which is or which is embedded in: a connected refrigerator or freezer, a TV, a connected lighting device, an electricity meter, a robot vacuum cleaner, a voice controlled smart speaker, a home security camera, a motion detector, a thermostat, a smoke detector, a door / window sensor, a flood / moisture sensor, an electrical door lock, a connected doorbell, an air conditioning system like a heat pump, an autonomous vehicle, a surveillance system, a weather monitoring device, a vehicle parking monitoring device, an electric vehicle charging station, a smart watch, a fitness tracker, a head-mounted display for Augmented Reality (AR) or Virtual Reality (VR), a wearable for tactile augmentation or sensory enhancement, a water sprinkler, an animal- or item-tracking device, a sensor for monitoring a plant or animal, an industrial robot, an Unmanned Aerial Vehicle (UAV), and any kind of medical device, like a heart rate monitor or a remote controlled surgical robot. A UE in the form of an loT device comprises circuitry and / or software in dependence of the intended application of the loT device in addition to other components as described in relation to the UE QQ200 shown in Figure 11.

[0280] As yet another specific example, in an loT scenario, a UE may represent a machine or other device that performs monitoring and / or measurements, and transmits the results of such monitoring and / or measurements to another UE and / or a network node. The UE may in this case be an M2M device, which may in a 3GPP context be referred to as an MTC device. As one particular example, the UE may implement the 3GPP NB-loT standard. In other scenarios, a UE may represent a vehicle, such as a car, a bus, a truck, a ship and an airplane, or other equipment that is capable of monitoring and / or reporting on its operational status or other functions associated with its operation.

[0281] In practice, any number of UEs may be used together with respect to a single use case. For example, a first UE might be or be integrated in a drone and provide the drone’s speed information (obtained through a speed sensor) to a second UE that is a remote controller operating the drone. When the user makes changes from the remote controller, the first UE may adjust the throttle on the drone (e.g. by controlling an actuator) to increase or decrease the drone’s speed. The first and / or the second UE can also include more than one of the functionalities described above. For example, a UE might comprise the sensor and the actuator, and handle communication of data for both the speed sensor and the actuators.

[0282] Fig. 12 shows a network node QQ300 in accordance with some embodiments. As used herein, network node refers to equipment capable, configured, arranged and / or operable to communicate directly or indirectly with a UE and / or with other network nodes or equipment, in a telecommunication network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)), O-RAN nodes or components of an O-RAN node (e.g., O-RU, O-DU, O-CU).

[0283] Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and so, depending on the provided amount of coverage, may be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units, distributed units (e.g., in an O-RAN access node) and / or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS).

[0284] Other examples of network nodes include multiple transmission point (multi-TRP) 5G access nodes, multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, multi-cell / multicast coordination entities (MCEs), Operation and Maintenance (O&M) nodes, Operations Support System (OSS) nodes, SelfOrganizing Network (SON) nodes, positioning nodes (e.g., Evolved Serving Mobile Location Centers (E-SMLCs)), and / or Minimization of Drive Tests (MDTs).

[0285] The network node QQ300 includes a processing circuitry QQ302, a memory QQ304, a communication interface QQ306, and a power source QQ308. The network node QQ300 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components. In certain scenarios in which the network node QQ300 comprises multiple separate components (e.g., BTS and BSC components), one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeBs. In such a scenario, each unique NodeB and RNC pair, may in some instances be considered a single separate network node. In some embodiments, the network node QQ300 may be configured to support multiple radio access technologies (RATs). In such embodiments, some components may be duplicated (e.g., separate memory QQ304 for different RATs) and some components may be reused (e.g., a same antenna QQ310 may be shared by different RATs). The network node QQ300 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node QQ300, for example GSM, WCDMA, LTE, NR, WiFi, Zigbee, Z-wave, LoRaWAN, Radio Frequency Identification (RFID) or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node QQ300.

[0286] The processing circuitry QQ302 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and / or encoded logic operable to provide, either alone or in conjunction with other network node QQ300 components, such as the memory QQ304, to provide network node QQ300 functionality. In some embodiments, the processing circuitry QQ302 includes a system on a chip (SOC). In some embodiments, the processing circuitry QQ302 includes one or more of radio frequency (RF) transceiver circuitry QQ312 and baseband processing circuitry QQ314. In some embodiments, the radio frequency (RF) transceiver circuitry QQ312 and the baseband processing circuitry QQ314 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry QQ312 and baseband processing circuitry QQ314 may be on the same chip or set of chips, boards, or units.

[0287] The memory QQ304 may comprise any form of volatile or non-volatile computer-readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and / or any other volatile or nonvolatile, non-transitory device-readable and / or computer-executable memory devices that store information, data, and / or instructions that may be used by the processing circuitry QQ302. The memory QQ304 may store any suitable instructions, data, or information, including a computer program, software, an application including one or more of logic, rules, code, tables, and / or other instructions capable of being executed by the processing circuitry QQ302 and utilized by the network node QQ300. The memory QQ304 may be used to store any calculations made by the processing circuitry QQ302 and / or any data received via the communication interface QQ306. In some embodiments, the processing circuitry QQ302 and memory QQ304 is integrated.

[0288] The communication interface QQ306 is used in wired or wireless communication of signaling and / or data between a network node, access network, and / or UE. As illustrated, the communication interface QQ306 comprises port(s) / terminal(s) QQ316 to send and receive data, for example to and from a network over a wired connection. The communication interface QQ306 also includes radio front-end circuitry QQ318 that may be coupled to, or in certain embodiments a part of, the antenna QQ310. Radio front-end circuitry QQ318 comprises filters QQ320 and amplifiers QQ322. The radio front-end circuitry QQ318 may be connected to an antenna QQ310 and processing circuitry QQ302. The radio front-end circuitry may be configured to condition signals communicated between antenna QQ310 and processing circuitry QQ302. The radio front-end circuitry QQ318 may receive digital data that is to be sent out to other network nodes or UEs via a wireless connection. The radio front-end circuitry QQ318 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters QQ320 and / or amplifiers QQ322. The radio signal may then be transmitted via the antenna QQ310. Similarly, when receiving data, the antenna QQ310 may collect radio signals which are then converted into digital data by the radio front-end circuitry QQ318. The digital data may be passed to the processing circuitry QQ302. In other embodiments, the communication interface may comprise different components and / or different combinations of components. In certain alternative embodiments, the network node QQ300 does not include separate radio front-end circuitry QQ318, instead, the processing circuitry QQ302 includes radio front-end circuitry and is connected to the antenna QQ310. Similarly, in some embodiments, all or some of the RF transceiver circuitry QQ312 is part of the communication interface QQ306. In still other embodiments, the communication interface QQ306 includes one or more ports or terminals QQ316, the radio front-end circuitry QQ318, and the RF transceiver circuitry QQ312, as part of a radio unit (not shown), and the communication interface QQ306 communicates with the baseband processing circuitry QQ314, which is part of a digital unit (not shown).

[0289] The antenna QQ310 may include one or more antennas, or antenna arrays, configured to send and / or receive wireless signals. The antenna QQ310 may be coupled to the radio front-end circuitry QQ318 and may be any type of antenna capable of transmitting and receiving data and / or signals wirelessly. In certain embodiments, the antenna QQ310 is separate from the network node QQ300 and connectable to the network node QQ300 through an interface or port.

[0290] The antenna QQ310, communication interface QQ306, and / or the processing circuitry QQ302 may be configured to perform any receiving operations and / or certain obtaining operations described herein as being performed by the network node. Any information, data and / or signals may be received from a UE, another network node and / or any other network equipment. Similarly, the antenna QQ310, the communication interface QQ306, and / or the processing circuitry QQ302 may be configured to perform any transmitting operations described herein as being performed by the network node. Any information, data and / or signals may be transmitted to a UE, another network node and / or any other network equipment.

[0291] The power source QQ308 provides power to the various components of network node QQ300 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component). The power source QQ308 may further comprise, or be coupled to, power management circuitry to supply the components of the network node QQ300 with power for performing the functionality described herein. For example, the network node QQ300 may be connectable to an external power source (e.g., the power grid, an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry of the power source QQ308. As a further example, the power source QQ308 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry. The battery may provide backup power should the external power source fail.

[0292] Embodiments of the network node QQ300 may include additional components beyond those shown in Figure 12 for providing certain aspects of the network node’s functionality, including any of the functionality described herein and / or any functionality necessary to support the subject matter described herein. For example, the network node QQ300 may include user interface equipment to allow input of information into the network node QQ300 and to allow output of information from the network node QQ300. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for the network node QQ300.

[0293] Fig. 13 is a block diagram of a host QQ400, which may be an embodiment of the host QQ116 of Figure 10, in accordance with various aspects described herein. As used herein, the host QQ400 may be or comprise various combinations hardware and / or software, including a standalone server, a blade server, a cloud-implemented server, a distributed server, a virtual machine, container, or processing resources in a server farm. The host QQ400 may provide one or more services to one or more UEs.

[0294] The host QQ400 includes processing circuitry QQ402 that is operatively coupled via a bus QQ404 to an input / output interface QQ406, a network interface QQ408, a power source QQ410, and a memory QQ412. Other components may be included in other embodiments. Features of these components may be substantially similar to those described with respect to the devices of previous figures, such as Figures 11 and 12, such that the descriptions thereof are generally applicable to the corresponding components of host QQ400.

[0295] The memory QQ412 may include one or more computer programs including one or more host application programs QQ414 and data QQ416, which may include user data, e.g., data generated by a UE for the host QQ400 or data generated by the host QQ400 for a UE. Embodiments of the host QQ400 may utilize only a subset or all of the components shown. The host application programs QQ414 may be implemented in a container-based architecture and may provide support for video codecs (e.g., Versatile Video Coding (WC), High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), MPEG, VP9) and audio codecs (e.g., FLAG, Advanced Audio Coding (AAC), MPEG, G.711), including transcoding for multiple different classes, types, or implementations of UEs (e.g., handsets, desktop computers, wearable display systems, heads-up display systems). The host application programs QQ414 may also provide for user authentication and licensing checks and may periodically report health, routes, and content availability to a central node, such as a device in or on the edge of a core network. Accordingly, the host QQ400 may select and / or indicate a different host for over-the-top services for a UE. The host application programs QQ414 may support various protocols, such as the HTTP Live Streaming (HLS) protocol, Real-Time Messaging Protocol (RTMP), Real-Time Streaming Protocol (RTSP), Dynamic Adaptive Streaming over HTTP (MPEG-DASH), etc.

[0296] Fig. 14 is a block diagram illustrating a virtualization environment QQ500 in which functions implemented by some embodiments may be virtualized. In the present context, virtualizing means creating virtual versions of apparatuses or devices which may include virtualizing hardware platforms, storage devices and networking resources. As used herein, virtualization can be applied to any device described herein, or components thereof, and relates to an implementation in which at least a portion of the functionality is implemented as one or more virtual components. Some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines (VMs) implemented in one or more virtual environments QQ500 hosted by one or more of hardware nodes, such as a hardware computing device that operates as a network node, UE, core network node, or host. Further, in embodiments in which the virtual node does not require radio connectivity (e.g., a core network node or host), then the node may be entirely virtualized. In some embodiments, the virtualization environment QQ500 includes components defined by the O-RAN Alliance, such as an O-Cloud environment orchestrated by a Service Management and Orchestration Framework via an 0-2 interface.

[0297] Applications QQ502 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) are run in the virtualization environment Q400 to implement some of the features, functions, and / or benefits of some of the embodiments disclosed herein.

[0298] Hardware QQ504 includes processing circuitry, memory that stores software and / or instructions executable by hardware processing circuitry, and / or other hardware devices as described herein, such as a network interface, input / output interface, and so forth. Software may be executed by the processing circuitry to instantiate one or more virtualization layers QQ506 (also referred to as hypervisors or virtual machine monitors (VMMs)), provide VMs QQ508a and QQ508b (one or more of which may be generally referred to as VMs QQ508), and / or perform any of the functions, features and / or benefits described in relation with some embodiments described herein. The virtualization layer QQ506 may present a virtual operating platform that appears like networking hardware to the VMs QQ508.

[0299] The VMs QQ508 comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer QQ506. Different embodiments of the instance of a virtual appliance QQ502 may be implemented on one or more of VMs QQ508, and the implementations may be made in different ways. Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV). NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment.

[0300] In the context of NFV, a VM QQ508 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of the VMs QQ508, and that part of hardware QQ504 that executes that VM, be it hardware dedicated to that VM and / or hardware shared by that VM with others of the VMs, forms separate virtual network elements. Still in the context of NFV, a virtual network function is responsible for handling specific network functions that run in one or more VMs QQ508 on top of the hardware QQ504 and corresponds to the application QQ502.

[0301] Hardware QQ504 may be implemented in a standalone network node with generic or specific components. Hardware QQ504 may implement some functions via virtualization. Alternatively, hardware QQ504 may be part of a larger cluster of hardware (e.g. such as in a data center or CPE) where many hardware nodes work together and are managed via management and orchestration QQ510, which, among others, oversees lifecycle management of applications QQ502. In some embodiments, hardware QQ504 is coupled to one or more radio units that each include one or more transmitters and one or more receivers that may be coupled to one or more antennas. Radio units may communicate directly with other hardware nodes via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station. In some embodiments, some signaling can be provided with the use of a control system QQ512 which may alternatively be used for communication between hardware nodes and radio units.

[0302] Fig. 15 shows a communication diagram of a host QQ602 communicating via a network node QQ604 with a UE QQ606 over a partially wireless connection in accordance with some embodiments. Example implementations, in accordance with various embodiments, of the UE (such as a UE QQ112a of Figure 10 and / or UE QQ200 of Figure 11), network node (such as network node QQ110a of Figure 10 and / or network node QQ300 of Figure 12), and host (such as host QQ116 of Figure 10 and / or host QQ400 of Figure 13) discussed in the preceding paragraphs will now be described with reference to Figure 15.

[0303] Like host QQ400, embodiments of host QQ602 include hardware, such as a communication interface, processing circuitry, and memory. The host QQ602 also includes software, which is stored in or accessible by the host QQ602 and executable by the processing circuitry. The software includes a host application that may be operable to provide a service to a remote user, such as the UE QQ606 connecting via an over-the-top (OTT) connection QQ650 extending between the UE QQ606 and host QQ602. In providing the service to the remote user, a host application may provide user data which is transmitted using the OTT connection QQ650.

[0304] The network node QQ604 includes hardware enabling it to communicate with the host QQ602 and UE QQ606. The connection QQ660 may be direct or pass through a core network (like core network QQ106 of Figure 10) and / or one or more other intermediate networks, such as one or more public, private, or hosted networks. For example, an intermediate network may be a backbone network or the Internet.

[0305] The UE QQ606 includes hardware and software, which is stored in or accessible by UE QQ606 and executable by the UE’s processing circuitry. The software includes a client application, such as a web browser or operator-specific “app” that may be operable to provide a service to a human or non-human user via UE QQ606 with the support of the host QQ602. In the host QQ602, an executing host application may communicate with the executing client application via the OTT connection QQ650 terminating at the UE QQ606 and host QQ602. In providing the service to the user, the UE's client application may receive request data from the host's host application and provide user data in response to the request data. The OTT connection QQ650 may transfer both the request data and the user data. The UE's client application may interact with the user to generate the user data that it provides to the host application through the OTT connection QQ650.

[0306] The OTT connection QQ650 may extend via a connection QQ660 between the host QQ602 and the network node QQ604 and via a wireless connection QQ670 between the network node QQ604 and the UE QQ606 to provide the connection between the host QQ602 and the UE QQ606. The connection QQ660 and wireless connection QQ670, over which the OTT connection QQ650 may be provided, have been drawn abstractly to illustrate the communication between the host QQ602 and the UE QQ606 via the network node QQ604, without explicit reference to any intermediary devices and the precise routing of messages via these devices.

[0307] As an example of transmitting data via the OTT connection QQ650, in step QQ608, the host QQ602 provides user data, which may be performed by executing a host application. In some embodiments, the user data is associated with a particular human user interacting with the UE QQ606. In other embodiments, the user data is associated with a UE QQ606 that shares data with the host QQ602 without explicit human interaction. In step QQ610, the host QQ602 initiates a transmission carrying the user data towards the UE QQ606. The host QQ602 may initiate the transmission responsive to a request transmitted by the UE QQ606. The request may be caused by human interaction with the UE QQ606 or by operation of the client application executing on the UE QQ606. The transmission may pass via the network node QQ604, in accordance with the teachings of the embodiments described throughout this disclosure. Accordingly, in step QQ612, the network node QQ604 transmits to the UE QQ606 the user data that was carried in the transmission that the host QQ602 initiated, in accordance with the teachings of the embodiments described throughout this disclosure. In step QQ614, the UE QQ606 receives the user data carried in the transmission, which may be performed by a client application executed on the UE QQ606 associated with the host application executed by the host QQ602.

[0308] In some examples, the UE QQ606 executes a client application which provides user data to the host QQ602. The user data may be provided in reaction or response to the data received from the host QQ602. Accordingly, in step QQ616, the UE QQ606 may provide user data, which may be performed by executing the client application. In providing the user data, the client application may further consider user input received from the user via an input / output interface of the UE QQ606. Regardless of the specific manner in which the user data was provided, the UE QQ606 initiates, in step QQ618, transmission of the user data towards the host QQ602 via the network node QQ604. In step QQ620, in accordance with the teachings of the embodiments described throughout this disclosure, the network node QQ604 receives user data from the UE QQ606 and initiates transmission of the received user data towards the host QQ602. In step QQ622, the host QQ602 receives the user data carried in the transmission initiated by the UE QQ606.

[0309] One or more of the various embodiments improve the performance of OTT services provided to the UE QQ606 using the OTT connection QQ650, in which the wireless connection QQ670 forms the last segment. More precisely, the teachings of these embodiments may improve energy consumption and thereby provide benefits such as better communication, better responsiveness, and / or better battery life.

[0310] In an example scenario, factory status information may be collected and analyzed by the host QQ602. As another example, the host QQ602 may process audio and video data which may have been retrieved from a UE for use in creating maps. As another example, the host QQ602 may collect and analyze real-time data to assist in controlling vehicle congestion (e.g., controlling traffic lights). As another example, the host QQ602 may store surveillance video uploaded by a UE. As another example, the host QQ602 may store or control access to media content such as video, audio, VR or AR which it can broadcast, multicast or unicast to UEs. As other examples, the host QQ602 may be used for energy pricing, remote control of non-time critical electrical load to balance power generation needs, location services, presentation services (such as compiling diagrams etc. from data collected from remote devices), or any other function of collecting, retrieving, storing, analyzing and / or transmitting data.

[0311] In some examples, a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring the OTT connection QQ650 between the host QQ602 and UE QQ606, in response to variations in the measurement results. The measurement procedure and / or the network functionality for reconfiguring the OTT connection may be implemented in software and hardware of the host QQ602 and / or UE QQ606. In some embodiments, sensors (not shown) may be deployed in or in association with other devices through which the OTT connection QQ650 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software may compute or estimate the monitored quantities. The reconfiguring of the OTT connection QQ650 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not directly alter the operation of the network node QQ604. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling that facilitates measurements of throughput, propagation times, latency and the like, by the host QQ602. The measurements may be implemented in that software causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection QQ650 while monitoring propagation times, errors, etc.

[0312] Although the computing devices described herein (e.g., UEs, network nodes, hosts) may include the illustrated combination of hardware components, other embodiments may comprise computing devices with different combinations of components. It is to be understood that these computing devices may comprise any suitable combination of hardware and / or software needed to perform the tasks, features, functions and methods disclosed herein. Determining, calculating, obtaining or similar operations described herein may be performed by processing circuitry, which may process information by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and / or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination. Moreover, while components are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, computing devices may comprise multiple different physical components that make up a single illustrated component, and functionality may be partitioned between separate components. For example, a communication interface may be configured to include any of the components described herein, and / or the functionality of the components may be partitioned between the processing circuitry and the communication interface. In another example, non- computationally intensive functions of any of such components may be implemented in software or firmware and computationally intensive functions may be implemented in hardware.

[0313] In certain embodiments, some or all of the functionality described herein may be provided by processing circuitry executing instructions stored on in memory, which in certain embodiments may be a computer program product in the form of a non-transitory computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by the processing circuitry without executing instructions stored on a separate or discrete device-readable storage medium, such as in a hard-wired manner. In any of those particular embodiments, whether executing instructions stored on a non-transitory computer-readable storage medium or not, the processing circuitry can be configured to perform the described functionality. The benefits provided by such functionality are not limited to the processing circuitry alone or to other components of the computing device, but are enjoyed by the computing device as a whole, and / or by end users and a wireless network generally.

[0314] It will be appreciated that the foregoing description and the accompanying drawings represent non-limiting examples of the methods and apparatus taught herein. As such, the apparatus and techniques taught herein are not limited by the foregoing description and accompanying drawings. Instead, the embodiments herein are limited only by the following claims and their legal equivalents.

Claims

CLAIMS1. A method performed by a user equipment, UE, (10) for handling communication in a wireless communication network, the method comprising upon a condition fulfilled, transmitting (404) to a radio network node (120), an indication requesting transmission of a synchronization signal, wherein the condition comprises one or more of the following:• when a speed of the UE (10) is above a speed threshold;• when the UE (10) has moved more than a distance;• when the UE (10) detects user activity of the UE (10);• when a measurement of a downlink reference signal is below a signal threshold;• when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and• when the UE (10) fulfills a mobility event.

2. The method according to claim 1, comprising transmitting (401) to the radio network node (120), a capability indication indicating capability of requesting a transmission of a synchronization signal.

3. The method according to any of the claims 1-2, comprising receiving (402) a configuration indication comprising a configuration for requesting the transmission of the synchronization signal.

4. The method according to any of the claims 1-3, comprising determining (403) to transmit the request when the condition fulfilled.

5. The method according to any of the claims 1-4, comprising- performing (405) a measurement on the synchronization signal.

6. A method performed by a radio network node (120) for handling communication in a wireless communication network, the method comprising transmitting (502) to a user equipment, UE, (10), a configuration indication comprising a configuration for requesting a transmission of a synchronization signal, wherein the configuration comprises a condition to be fulfilled for requesting the transmission of a synchronization signal, wherein the condition comprises one or more of the following:• when a speed of the UE (10) is above a speed threshold;• when the UE (10) has moved more than a distance;• when the UE (10) detects user activity of the UE (10);• when a measurement of a downlink reference signal is below a signal threshold;• when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and• when the UE (10) fulfills a mobility event; receiving (503) from the UE (10), an indication requesting transmission of a synchronization signal; and triggering (504) a transmission based on the received indication.

7. The method according to claim 6, comprising receiving (501) from the UE (10), a capability indication indicating capability of requesting a transmission of a synchronization signal.

8. A user equipment, UE, (10) for handling communication in a wireless communication network, wherein the UE (10) is configured to: upon a condition fulfilled, transmit to a radio network node (120), an indication requesting transmission of a synchronization signal, wherein the condition comprises one or more of the following:• when a speed of the UE (10) is above a speed threshold;• when the UE (10) has moved more than a distance;• when the UE (10) detects user activity of the UE (10);• when a measurement of a downlink reference signal is below a signal threshold;• when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and• when the UE (10) fulfills a mobility event.

9. The UE (10) according to claim 8, wherein the UE (10) is configured to: transmit to the radio network node (120), a capability indication indicating capability of requesting a transmission of a synchronization signal.

10. The UE (10) according to any of the claims 8-9, wherein the UE (10) is configured to: receive a configuration indication comprising a configuration for requesting the transmission of the synchronization signal.

11. The UE (10) according to any of the claims 8-10, wherein the UE (10) is configured to: determine to transmit the request when the condition fulfilled.

12. The UE (10) according to any of the claims 8-11 , wherein the UE (10) is configured to:perform a measurement on the synchronization signal.

13. A radio network node (120) for handling communication in a wireless communication network, wherein the radio network node (120) is configured to transmit to a user equipment, UE, (10), a configuration indication comprising a configuration for requesting a transmission of a synchronization signal, wherein the configuration comprises a condition to be fulfilled for requesting the transmission of a synchronization signal, wherein the condition comprises one or more of the following:• when a speed of the UE (10) is above a speed threshold;• when the UE (10) has moved more than a distance;• when the UE (10) detects user activity of the UE (10);• when a measurement of a downlink reference signal is below a signal threshold;• when a time passed from a previously transmitted indication requesting transmission of a synchronization signal is above a time threshold; and• when the UE (10) fulfills a mobility event; receive from the UE (10), an indication requesting transmission of a synchronization signal; and trigger a transmission based on the received indication.

14. The radio network node according to claim 13, wherein the radio network node (120) is configured to receive from the UE (10), a capability indication indicating capability of requesting a transmission of a synchronization signal.

15. A computer program product comprising instructions, which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of the claims 1-7, as performed by the UE (10) and the radio network node (120), respectively.

16. A computer-readable storage medium, having stored thereon a computer program product comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of the claims 1-7, as performed by, as performed by the UE (10) and the radio network node (120), respectively.

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