[go: up one dir, main page]

WO2018080723A1 - Resélection de cellule dans une communication basée sur un faisceau - Google Patents

Resélection de cellule dans une communication basée sur un faisceau Download PDF

Info

Publication number
WO2018080723A1
WO2018080723A1 PCT/US2017/054250 US2017054250W WO2018080723A1 WO 2018080723 A1 WO2018080723 A1 WO 2018080723A1 US 2017054250 W US2017054250 W US 2017054250W WO 2018080723 A1 WO2018080723 A1 WO 2018080723A1
Authority
WO
WIPO (PCT)
Prior art keywords
value
cells
cell
beams
processors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/054250
Other languages
English (en)
Inventor
Kyeongin Jeong
Candy YIU
Umesh PHUYAL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel IP Corp
Original Assignee
Intel IP Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel IP Corp filed Critical Intel IP Corp
Publication of WO2018080723A1 publication Critical patent/WO2018080723A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • the present disclosure relates generally to cell reselection in cellular data networks. More specifically the disclosure relates to cell reselection in cellular data networks employing beam-based communication.
  • FIG. 1 illustrates an architecture of a system of a network in accordance with some embodiments.
  • FIG. 2 is a simplified block diagram of a system illustrating an example of beam-sweeping for synchronization channel (SCH) and reference signal (RS), according to some embodiments.
  • SCH synchronization channel
  • RS reference signal
  • FIG. 3 is a simplified signal flow diagram illustrating signaling of proposed parameters between an NR-NB and a user equipment (UE), according to some embodiments.
  • FIG. 4 is a simplified flowchart illustrating a method of a UE performing cell reselection, according to some embodiments.
  • FIG. 5 illustrates example components of a device in accordance with some embodiments.
  • FIG. 6 illustrates example interfaces of baseband circuitry in accordance with some embodiments.
  • FIG. 7 is a block diagram illustrating components, according to some example embodiments. Detailed Description of Preferred Embodiments
  • RRC radio resource control
  • the measurements are done based on the synchronization channel (PSS: Primary Synchronization Channel and/or SSS: Secondary
  • the UE checks if the measured result can meet S criterion and if so the UE ranks the candidate cells that met S criterion according to R criterion. If the UE determines to be able to camp on the highest ranked candidate cell as a result of the acquisition of essential system information from that cell, the UE reselects (camps) on the target candidate cell.
  • S criterion and R criterion are specified as follows. Please see more details in 3GPP TS36.304 regarding "E-UTRA UE procedures in idle mode:" as follows:
  • the cell selection criterion is defined in sub-clause 5.2.3.2.a.
  • the cell selection criterion S in normal coverage is fulfilled
  • PEMAX2 are obtained from the p-Max and the NS- PmaxList respectively in SIB1 , SIB3 and SIB5 as specified in TS 36.331 ... .
  • PpowerClass Maximum RF output power of the UE (dBm) according to the UE power class as defined in TS 36.101 ...
  • the signaled values Qrxlevminoffset and Q qU aiminoffset are only applied when a cell is evaluated for cell selection as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN ... .
  • the UE may check the S criteria of a cell using parameter values stored from a different cell of this higher priority PLMN.
  • cell selection criterion S in normal coverage is not fulfilled for a cell
  • UE shall consider itself to be in enhanced coverage if the cell selection criterion S for enhanced coverage is fulfilled, where:
  • coverage specific values Qrxievmin_cE and Q qU aimin_cE are only applied for the suitability check in enhanced coverage (i.e. not used for measurement and reselection thresholds).
  • the cell-ranking criterion R s for serving cell and R n for neighboring cells is defined by:
  • the UE shall perform ranking of all cells that fulfil the cell selection criterion S, which is defined in 5.2.3.2 (5.2.3.2a for NB-loT), but may exclude all CSG cells that are known by the UE not to be CSG member cells.
  • the cells shall be ranked according to the R criteria specified above, deriving Qmeas.n and Q mea s , s and calculating the R values using averaged RSRP results.
  • the UE shall perform cell reselection to that cell. If this cell is found to be not-suitable, the UE
  • the UE shall reselect the new cell, only if the following conditions are met:
  • the new cell is better ranked than the serving cell during a time interval Treselection RA T;
  • new RAT Radio Access Technology
  • One of the target frequency bands is a very high frequency band (e.g., tens of GHz bands). Due to the high frequency band characteristics (e.g., high attenuation, etc.), a transmission mechanism that may enable enough coverage is also under study.
  • One of the candidate transmission mechanisms includes a synchronization channel (SCH) and reference signal (RS).
  • SCH and RS may be used for measurements for idle mode UE mobility, and possibly for connected mode UE mobility, in high frequency bands.
  • SCH and RS may be transmitted on a direct narrow beam, which may be repeated at various angles to cover multiple (e.g., all) angles.
  • FIG. 2 illustrates an example of beam-sweeping for SCH and RS.
  • Each narrow-direct beam also known as “beam for narrow-direct beam” carries SCH and RS for a cell.
  • This beam-sweeping for SCH and RS is unlike LTE communication at least in that a UE may detect multiple SCH and RS from a cell (i.e., which are sent by different beams from a single cell).
  • Embodiments disclosed herein address how to perform measurement evaluations (e.g., S criterion and/or R criterion) in the possible presence of multiple detected beams for a single cell.
  • Embodiments disclosed herein may include a mechanism to evaluate measurements for the idle (and possibly connected) mode UE mobility in the beam-based SCH and RS transmission. This mechanism may include the following elements:
  • the cellular base station e.g., Radio Access Network (RAN) Nodes, evolved NodeBs (eNBs) NR NodeBs (NR-NBs), etc.
  • RAN Radio Access Network
  • eNBs evolved NodeBs
  • NR-NBs NR NodeBs
  • the UE ranks the cells that meet S criterion according to R criterion based on the measured result from the best beam of a cell.
  • the UE selects the highest ranked cell for the candidate target cell for cell reselection.
  • the UE ranks the cells that meet S criterion and are within the offset range from the highest ranked cell according to R criterion based on the measured result from N number of beams a cell.
  • FIG. 4 below provides a more detailed illustration of an example of this mechanism.
  • the UE If the UE cannot camp on the highest ranked cell due to some reason (e.g., the UE is not allowed to camp on that cell as the result of system information acquisition), the UE repeats the elements above from 2 to 4. In this case, the highest ranked cell is changed into the next ranked cell.
  • FIG. 1 illustrates an architecture of a system 100 of a network in
  • the system 100 is shown to include a user equipment (UE) 101 and a UE 102.
  • UE user equipment
  • the UEs 101 and 102 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks), but may also comprise any mobile or non-mobile computing device, such as Personal Data Assistants (PDAs), pagers, laptop computers, desktop computers, wireless handsets, or any computing device including a wireless communications interface.
  • PDAs Personal Data Assistants
  • pagers pagers
  • laptop computers desktop computers
  • wireless handsets wireless communications interface
  • any of the UEs 101 and 102 can comprise an Internet of Things (loT) UE, which can comprise a network access layer designed for low-power loT applications utilizing short-lived UE connections.
  • An loT UE can utilize technologies such as machine-to-machine (M2M) or machine-type communications (MTC) for exchanging data with an MTC server or device via a public land mobile network (PLMN), Proximity-Based Service (ProSe) or
  • M2M machine-to-machine
  • MTC machine-type communications
  • PLMN public land mobile network
  • Proximity-Based Service Proximity-Based Service
  • loT network describes interconnecting loT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure), with short-lived connections.
  • the loT UEs may execute background applications (e.g., keep-alive messages, status updates, etc.) to facilitate the connections of the loT network.
  • the UEs 101 and 102 may be configured to connect, e.g.,
  • the RAN 1 10 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), a NextGen RAN (NG RAN), or some other type of RAN.
  • UMTS Evolved Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System
  • NG RAN NextGen RAN
  • the UEs 101 and 102 utilize connections 103 and 104, respectively, each of which comprises a physical communications interface or layer (discussed in further detail below); in this example, the connections 103 and 104 are illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols, such as a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like.
  • GSM Global System for Mobile Communications
  • CDMA code-division multiple access
  • PTT Push-to-Talk
  • POC PTT over Cellular
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • 5G fifth generation
  • NR New Radio
  • the UEs 101 and 102 may further directly exchange communication data via a ProSe interface 105.
  • the ProSe interface 105 may alternatively be referred to as a sidelink interface comprising one or more logical channels, including but not limited to a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery
  • PSDCH Physical Sidelink Broadcast Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the UE 102 is shown to be configured to access an access point (AP) 106 via connection 107.
  • the connection 107 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.1 1 protocol, wherein the AP 106 would comprise a wireless fidelity (WiFi®) router.
  • WiFi® wireless fidelity
  • the AP 106 is shown to be connected to the Internet without connecting to the core network of the wireless system (described in further detail below).
  • the RAN 1 10 can include one or more access nodes that enable the connections 103 and 104.
  • These access nodes can be referred to as base stations (BSs), NodeBs, evolved NodeBs (eNBs), next Generation NodeBs (gNB), RAN nodes, and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
  • BSs base stations
  • eNBs evolved NodeBs
  • gNB next Generation NodeBs
  • RAN nodes and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
  • the RAN 1 10 may include one or more RAN nodes for providing macrocells, e.g., a macro RAN node 1 1 1 , and one or more RAN nodes for providing femtocells or picocells (e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells), e.g., a low power (LP) RAN node 1 12.
  • a macro RAN node 1 1 1 may include one or more RAN nodes for providing macrocells, e.g., a macro RAN node 1 1 1 , and one or more RAN nodes for providing femtocells or picocells (e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells), e.g., a low power (LP) RAN node 1 12.
  • a low power (LP) RAN node 1 12 may include one or more RAN nodes for providing macrocells, e.g.,
  • Any of the RAN nodes 1 1 1 and 1 12 can terminate the air interface protocol and can be the first point of contact for the UEs 101 and 102. In some
  • any of the RAN nodes 1 1 1 and 1 12 can fulfill various logical functions for the RAN 1 10 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
  • RNC radio network controller
  • the UEs 101 and 102 can be configured to communicate using Orthogonal Frequency-Division Multiplexing
  • OFDM Orthogonal Frequency- Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the OFDM signals can comprise a plurality of orthogonal subcarriers.
  • a downlink resource grid can be used for downlink transmissions from any of the RAN nodes 1 1 1 and 1 12 to the UEs 101 and 102, while uplink transmissions can utilize similar techniques.
  • the grid can be a time- frequency grid, called a resource grid or time-frequency resource grid, which is the physical resource in the downlink in each slot.
  • a time-frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation.
  • Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively.
  • the duration of the resource grid in the time domain corresponds to one slot in a radio frame.
  • the smallest time-frequency unit in a resource grid is denoted as a resource element.
  • Each resource grid comprises a number of resource blocks, which describe the mapping of certain physical channels to resource elements.
  • Each resource block comprises a collection of resource elements; in the frequency domain, this may represent the smallest quantity of resources that currently can be allocated.
  • the physical downlink shared channel may carry user data and higher-layer signaling to the UEs 101 and 102.
  • the physical downlink control channel (PDCCH) may carry information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UEs 101 and 102 about the transport format, resource allocation, and H-ARQ (Hybrid Automatic Repeat Request) information related to the uplink shared channel.
  • downlink scheduling (assigning control and shared channel resource blocks to the UE 102 within a cell) may be performed at any of the RAN nodes 1 1 1 and 1 12 based on channel quality information fed back from any of the UEs 101 and 102.
  • the downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) each of the UEs 101 and 102.
  • the PDCCH may use control channel elements (CCEs) to convey the control information.
  • CCEs control channel elements
  • the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
  • Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs).
  • RAGs resource element groups
  • QPSK Quadrature Phase Shift Keying
  • the PDCCH can be transmitted using one or more CCEs, depending on the size of the downlink control information (DCI) and the channel condition.
  • DCI downlink control information
  • There can be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L 1 , 2, 4, or 8).
  • Some embodiments may use concepts for resource allocation for control channel information that are an extension of the above-described concepts.
  • some embodiments may utilize an enhanced physical downlink control channel (EPDCCH) that uses PDSCH resources for control information transmission.
  • the EPDCCH may be transmitted using one or more enhanced the control channel elements (ECCEs). Similar to above, each ECCE may correspond to nine sets of four physical resource elements known as enhanced resource element groups (EREGs). An ECCE may have other numbers of EREGs in some situations.
  • EPCCH enhanced physical downlink control channel
  • ECCEs enhanced the control channel elements
  • each ECCE may correspond to nine sets of four physical resource elements known as enhanced resource element groups (EREGs).
  • EREGs enhanced resource element groups
  • An ECCE may have other numbers of EREGs in some situations.
  • the RAN 1 10 is shown to be communicatively coupled to a core network (CN) 120— via an S1 interface 1 13.
  • the CN 120 may be an evolved packet core (EPC) network, a NextGen Packet Core (NPC) network, or some other type of CN.
  • EPC evolved packet core
  • NPC NextGen Packet Core
  • the S1 interface 1 13 is split into two parts: the S1 -U interface 1 14, which carries traffic data between the RAN nodes 1 1 1 and 1 12 and a serving gateway (S-GW) 122, and an S1 -mobility management entity (MME) interface 1 15, which is a signaling interface between the RAN nodes 1 1 1 and 1 12 and MMEs 121.
  • S-GW serving gateway
  • MME S1 -mobility management entity
  • the CN 120 comprises the MMEs 121 , the S-GW 122, a Packet Data Network (PDN) Gateway (P-GW) 123, and a home subscriber server (HSS) 124.
  • the MMEs 121 may be similar in function to the control plane of legacy Serving General Packet Radio Service (GPRS) Support Nodes (SGSN).
  • the MMEs 121 may manage mobility aspects in access such as gateway selection and tracking area list management.
  • the HSS 124 may comprise a database for network users, including subscription-related information to support the network entities' handling of communication sessions.
  • the CN 120 may comprise one or several HSSs 124, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc.
  • the HSS 124 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc.
  • the S-GW 122 may terminate the S1 interface 1 13 towards the RAN 1 10, and routes data packets between the RAN 1 10 and the CN 120.
  • the S- GW 122 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
  • the P-GW 123 may terminate an SGi interface toward a PDN.
  • the P-GW 123 may route data packets between the CN 120 (e.g., an EPC network) and external networks such as a network including an application server 130
  • an application server 130 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS Packet Services (PS) domain, LTE PS data services, etc.).
  • the P-GW 123 is shown to be communicatively coupled to the application server 130 via the IP communications interface 125.
  • the application server 130 can also be configured to support one or more communication services (e.g., Voice-over-Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc.) for the UEs 101 and 102 via the CN 120.
  • VoIP Voice-over-Internet Protocol
  • the P-GW 123 may further be a node for policy enforcement and charging data collection.
  • a Policy and Charging Enforcement Function (PCRF) 126 is the policy and charging control element of the CN 120.
  • PCRF Policy and Charging Enforcement Function
  • HPLMN Home Public Land Mobile Network
  • IP-CAN Internet Protocol Connectivity Access Network
  • HPLMN Home Public Land Mobile Network
  • V-PCRF Visited PCRF
  • VPLMN Visited Public Land Mobile Network
  • the PCRF 126 may be communicatively coupled to the application server 130 via the P-GW 123.
  • the application server 130 may signal the PCRF 126 to indicate a new service flow and select the appropriate Quality of Service (QoS) and charging parameters.
  • the PCRF 126 may provision this rule into a Policy and Charging Enforcement Function (PCEF) (not shown) with the appropriate traffic flow template (TFT) and QoS class of identifier (QCI), which commences the QoS and charging as specified by the application server 130.
  • PCEF Policy and Charging Enforcement Function
  • TFT traffic flow template
  • QCI QoS class of identifier
  • FIG. 2 is a simplified block diagram of a system 200 illustrating an example of beam sweeping for SCH and RS, according to some embodiments.
  • the system 200 includes a RAN node 208 (e.g., similar to one or both of the RAN nodes 1 1 1 , 1 12 of FIG. 1 ) configured to communicate with a UE 216 (e.g., similar to the UEs 101 , 102 of FIG. 1 ) using beam-sweeping for SCH and RS.
  • the RAN node 208 may be configured to communicate using beams 202, 204, 206, ... , 210, 212, 214, ... (sometimes referred to herein generically individually as "beam” or together as "beams").
  • the RAN node 208 may be configured to use beam scanning by utilizing the beams.
  • FIG. 3 is a simplified signal flow diagram 300 illustrating signaling of proposed parameters between an NR-NB 304 (e.g., the RAN node 208 of FIG. 2) and a UE 302 (e.g., the UE 216 of FIG. 2), according to some embodiments.
  • the RAN NR-NB 304 configures parameters for cell reselection of the UE 302. These parameters include an offset, a number of beams, and threshold parameters.
  • the NR-NB 304 transmits these parameters by system information. In some embodiments, these parameters may be transmitted via transmission point (sometimes referred to as "TRP"). In some embodiments, these parameters may be transmitted via a UE dedicated RRC (Radio Resource Control) message.
  • TRP transmission point
  • RRC Radio Resource Control
  • FIG. 4 is a simplified flowchart illustrating a method 400 of the UE 302 (FIG. 3) performing cell reselection, according to some embodiments.
  • the method 400 includes the UE 302 performing 402 measurements on cells including a serving cell and neighboring cells.
  • the UE may detect multiple SCHs and RSs for a given cell, which are received by different beams.
  • the method 400 also includes the UE 302 storing 404 (e.g., in a data storage device of the UE 302), for each cell, the measured results (e.g., a signal quality parameter, for instance a received signal power level, a received signal quality, a received signal to noise ratio, a received signal to interference ratio, a channel quality parameter, a bit error rate, other parameters, or combinations thereof) for best number N SCHs/RSs received by different beams.
  • the N value is configured by the NR-NB 304 and equivalent to number of beams of FIG. 3.
  • N may be configured to integer value "2”
  • the UE 302 may detect beams 210, 212, and 214 carrying the same SCH and RS (which means all beams belong to the same cell).
  • the measured result e.g. received signal power level, received signal quality, etc.
  • the measured result may be, for example, that the value of the signal quality parameters of beams 210, 212, and 214 are that the value of beam 212 > the value of beam 214 > the value of beam 210 (i.e. beam 212 has best radio condition, beam 214 has the second best radio condition, and beam 210 has the third-best radio condition based on the signal quality parameters).
  • the method 400 further includes the UE 302 checking 406, for each cell, if S criterion is met with the best SCH/RS measured result (e.g., the highest ranked beam based on the signal quality parameter). In the above example, the UE 302 uses the measured result for beam 212 to check if S criterion is met.
  • the NR-NB 304 may configure some indication to command the UE 302 to check S criterion by the best measured beam among multiple beams carrying same SCH/RS, or the mean value among multiple beams carrying same SCH/RS.
  • the method 400 also includes the UE 302 ranking 408, for the cells that meet S criterion, the cells according to R criterion with the best SCH/RS measured result for each cell.
  • the UE 302 uses the measured result from beam 212 for the corresponding cell to R criterion.
  • the method further includes the UE 302 checking 410 whether the highest ranked cell resulting from operation 408 is better than the second-highest ranked cell by the offset, which was indicated by the NR-NB 304 in FIG. 3. If yes, the method 400 includes the UE 302 choosing 412 the highest ranked cell as the target candidate cell for cell reselection. If the highest ranked cell is the same as the current serving cell, the UE 302 stays in the serving cell and operations 414, 416, and 418 are not performed. In other words, no cell reselection is performed.
  • the UE 302 acquires the system information from the target candidate cell and checks 414 whether the UE 302 is allowed to camp on that cell based on the received system information. If "yes,” the UE 302 performs 416 cell reselection to that cell. If "no" is determined in operation 414 the UE 302 considers 418 the second-highest ranked cell as the highest ranked cell and goes to operation 410.
  • the UE 302 uses the mean value from the measured results for beam 212 and beam 214. If a cell has only one measured result (e.g., only a single beam is detected for a given cell), that measured result is scaled down according to the received scaling factors (i.e., the scaling factors of FIG. 3).
  • the NR-NB 304 can configure the scaling factors as follows.
  • Scaling factor e.g., X value
  • Scaling factor e.g., Y value
  • the UE 302 multiplies the mean value obtained for the available results by the
  • the UE 302 multiplies the mean value for those two measured results by the associated scaling factor "X.”
  • the UE 302 multiplies that measured result by the associated scaling factor ⁇ .”
  • the method 400 includes choosing 422, as the result of operation 420, the highest ranked cell as the target candidate cell for cell reselection. If the highest ranked cell in operation 420 is not the current serving cell, the UE 302 acquires the system information from the target candidate cell and checks 424 whether the UE 302 is allowed to camp on that cell based on the received system information. If operation 424 results in "yes,” the UE performs 426 cell reselection to that cell. If operation 424 results in "no,” the UE 302 reverts 428 back the ranked list to that from operation 408 and considers the next highest ranked cell as the highest ranked cell, and proceeds to operation 410.
  • measurement evaluations e.g., S criterion and/or R criterion
  • measurement evaluations for cell reselection may be performed even in the presence of multiple beams for each cell. This enables the use of beam-sweeping for SCH and RS, and the use of target frequency bands that are in the tens of GHz.
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware.
  • the electronic device 500 may be, implement, be incorporated into, or otherwise be a part of a user equipment (UE), an evolved NodeB (eNB), and/or some other electronic device.
  • the electronic device 500 may include application circuitry 502, baseband circuitry 504, Radio Frequency (RF) circuitry 506, front-end module (FEM) circuitry 508, one or more antennas 510, and power management circuitry (PMC) 512 coupled together at least as shown.
  • the components of the illustrated device 500 may be included in a UE or a RAN node.
  • the electronic device 500 may also include network interface circuitry (not shown) for communicating over a wired interface (for example an X2 interface, an S1 interface, and the like).
  • the device 500 may include fewer elements (e.g., a RAN node may not utilize application circuitry 502, and instead include a processor/controller to process IP data received from an EPC).
  • the device 500 may include additional elements such as, for example, memory/storage, display, camera, sensor, or input/output (I/O) interface.
  • the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C-RAN) implementations).
  • C-RAN Cloud-RAN
  • the application circuitry 502 may include one or more application processors.
  • the application circuitry 502 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • processor(s) may include any combination of general-purpose processors
  • processors may be coupled with and/or may include computer-readable media (also referred to as "CRM,” “memory,” “storage,” or “memory/storage”) and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the device 500.
  • CRM computer-readable media
  • processors of application circuitry 502 may process IP data packets received from an EPC.
  • the baseband circuitry 504 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 504 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 506 and to generate baseband signals for a transmit signal path of the RF circuitry 506.
  • Baseband circuity 504 may interface with the application circuitry 502 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 506.
  • the baseband circuitry 504 may include a third generation (3G) baseband processor 504A, a fourth generation (4G) baseband processor 504B, a fifth generation (5G) baseband processor 504C, or other baseband processor(s) 504D for other existing generations, generations in development or to be developed in the future (e.g., second generation (2G), sixth generation (6G), etc.).
  • the baseband circuitry 504 e.g., one or more of baseband processors 504A-D
  • radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio
  • modulation/demodulation circuitry of the baseband circuitry 504 may include Fast-Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 504 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC)
  • LDPC Low Density Parity Check
  • Embodiments of modulation/demodulation and encoder/decoder functionality are not limited to these examples and may include other suitable functionality in other embodiments.
  • the baseband circuitry 504 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), package data convergence protocol (PDCP), and/or radio resource control (RRC) elements.
  • EUTRAN evolved universal terrestrial radio access network
  • a central processing unit (CPU) 504E of the baseband circuitry 504 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers.
  • the baseband circuitry 504 may include one or more audio digital signal processor(s) (DSP) 504F.
  • DSP digital signal processor
  • the audio DSP(s) 504F may include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • the baseband circuitry 504 may further include computer-readable media (also referred to as "CRM”, “memory”, “storage”, or “memory/storage”).
  • CRM may be used to load and store data and/or instructions for operations performed by the processors of the baseband circuitry 504.
  • CRM for one embodiment may include any combination of suitable volatile memory and/or non-volatile memory.
  • the CRM may include any combination of various levels of memory/storage including, but not limited to, readonly memory (ROM) having embedded software instructions (e.g., firmware), random access memory (e.g., dynamic random access memory (DRAM)), cache, buffers, etc.).
  • ROM readonly memory
  • DRAM dynamic random access memory
  • the CRM may be shared among the various processors or dedicated to particular processors.
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 504 and the application circuitry 502 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 504 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 504 may support communication with an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), or a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • multi-mode baseband circuitry Embodiments in which the baseband circuitry 504 is configured to support radio communications of more than one wireless protocol.
  • RF circuitry 506 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 506 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • the RF circuitry 506 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 508 and provide baseband signals to the baseband circuitry 504.
  • RF circuitry 506 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 504 and provide RF output signals to the FEM circuitry 508 for transmission.
  • the RF circuitry 506 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 506 may include mixer circuitry 506A, amplifier circuitry 506B and filter circuitry 506C.
  • the transmit signal path of the RF circuitry 506 may include filter circuitry 506C and mixer circuitry 506A.
  • RF circuitry 506 may also include
  • synthesizer circuitry 506D for synthesizing a frequency for use by the mixer circuitry 506A of the receive signal path and the transmit signal path.
  • the mixer circuitry 506A of the receive signal path may be configured to down- convert RF signals received from the FEM circuitry 508 based on the synthesized frequency provided by synthesizer circuitry 506D.
  • the amplifier circuitry 506B may be configured to amplify the down-converted signals and the filter circuitry 506C may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • LPF low-pass filter
  • BPF band-pass filter
  • Output baseband signals may be provided to the baseband circuitry 504 for further processing.
  • the output baseband signals may be zero- frequency baseband signals, although this is not a requirement.
  • the mixer circuitry 506A of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 506A of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 506D to generate RF output signals for the FEM circuitry 508.
  • the baseband signals may be provided by the baseband circuitry 504 and may be filtered by the filter circuitry 506C.
  • the filter circuitry 506C may include a low pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • LPF low pass filter
  • the mixer circuitry 506A of the receive signal path and the mixer circuitry 506A of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively.
  • the mixer circuitry 506A of the receive signal path and the mixer circuitry 506A of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
  • the mixer circuitry 506A of the receive signal path and the mixer circuitry 506A of the transmit signal path may be arranged for direct downconversion and direct upconversion, respectively.
  • the mixer circuitry 506A of the receive signal path and the mixer circuitry 506A of the transmit signal path may be configured for super-heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 506 may include analog-to- digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 504 may include a digital baseband interface to communicate with the RF circuitry 506.
  • ADC analog-to- digital converter
  • DAC digital-to-analog converter
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry 506D may be a fractional- N synthesizer or a fractional N/N+1 synthesizer, although the scope of the
  • synthesizer circuitry 506D may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 506D may be configured to synthesize an output frequency for use by the mixer circuitry 506A of the RF circuitry 506 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 506D may be a fractional N/N+1 synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 504 or the application circuitry 502 (such as an applications processor) depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a lookup table based on a channel indicated by the application circuitry 502.
  • Synthesizer circuitry 506D of the RF circuitry 506 may include a divider, a delay-locked loop (DLL), a multiplexer and a phase accumulator.
  • DLL delay-locked loop
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA).
  • the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.
  • the synthesizer circuitry 506D may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (fLO).
  • the RF circuitry 506 may include an IQ/polar converter.
  • FEM circuitry 508 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 510, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 506 for further processing.
  • the FEM circuitry 508 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 506 for transmission by one or more of the one or more antennas 510.
  • the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 506, solely in the FEM circuitry 508, or in both the RF circuitry 506 and the FEM circuitry 508.
  • the FEM circuitry 508 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry 508 may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry 508 may include a Low Noise Amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 506).
  • LNA Low Noise Amplifier
  • the transmit signal path of the FEM circuitry 508 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by the RF circuitry 506), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 510).
  • PA power amplifier
  • the PMC 512 may manage power provided to the baseband circuitry 504.
  • the PMC 512 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion.
  • the PMC 512 may often be included when the device 500 is capable of being powered by a battery, for example, when the device 500 is included in a UE.
  • the PMC 512 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.
  • FIG. 5 shows the PMC 512 coupled only with the baseband circuitry 504.
  • the PMC 512 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, the application circuitry 502, the RF circuitry 506, or the FEM circuitry 508.
  • the PMC 512 may control, or otherwise be part of, various power saving mechanisms of the device 500. For example, if the device 500 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 500 may power down for brief intervals of time and thus save power.
  • DRX Discontinuous Reception Mode
  • the device 500 may transition off to an RRCJdle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
  • the device 500 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
  • the device 500 may not receive data in this state, and in order to receive data, it transitions back to an RRC_Connected state.
  • An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
  • Processors of the application circuitry 502 and processors of the baseband circuitry 504 may be used to execute elements of one or more instances of a protocol stack.
  • processors of the baseband circuitry 504 alone or in combination, may be used to execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 502 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g.,
  • Layer 3 may comprise a radio resource control (RRC) layer, described in further detail below.
  • Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, described in further detail below.
  • Layer 1 may comprise a physical (PHY) layer of a UE/RAN node, described in further detail below.
  • FIG. 6 illustrates example interfaces of baseband circuitry in accordance with some embodiments.
  • the baseband circuitry 504 of FIG. 5 may comprise processors 504A-504E and a memory 504G utilized by said processors.
  • Each of the processors 504A-504E may include a memory interface, 604A-604E, respectively, to send/receive data to/from the memory 504G.
  • the baseband circuitry 504 may further include one or more interfaces to communicatively couple to other circuitries/devices, such as a memory interface 612 (e.g., an interface to send/receive data to/from memory external to the baseband circuitry 504), an application circuitry interface 614 (e.g., an interface to send/receive data to/from the application circuitry 502 of FIG. 5), an RF circuitry interface 616 (e.g., an interface to send/receive data to/from RF circuitry 506 of FIG. 5), a wireless hardware connectivity interface 618 (e.g., an interface to send/receive data to/from Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication
  • NFC Near Field Communication
  • Bluetooth® components e.g., Bluetooth® Low Energy
  • Wi-Fi® components e.g., Wi-Fi® components
  • a power management interface 620 e.g., an interface to send/receive power or control signals to/from the PMC 512.
  • FIG. 7 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and perform any one or more of the methodologies discussed herein.
  • a machine-readable or computer-readable medium e.g., a non-transitory machine-readable storage medium
  • FIG. 7 shows a diagrammatic representation of hardware resources 700 including one or more processors (or processor cores) 710, one or more
  • a hypervisor 702 may be executed to provide an execution environment for one or more network slices/sub-slices to utilize the hardware resources 700.
  • the processors 710 may include, for example, a processor 712 and a processor 714.
  • CPU central processing unit
  • RISC reduced instruction set computing
  • CISC complex instruction set computing
  • GPU graphics processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • RFIC radio-frequency integrated circuit
  • the memory/storage devices 720 may include main memory, disk storage, or any suitable combination thereof.
  • the memory/storage devices 720 may include, but are not limited to any type of volatile or non-volatile memory such as dynamic random access memory (DRAM), static random-access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), Flash memory, solid-state storage, etc.
  • DRAM dynamic random access memory
  • SRAM static random-access memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • Flash memory solid-state storage, etc.
  • the communication resources 730 may include interconnection or network interface components or other suitable devices to communicate with one or more peripheral devices 704 or one or more databases 706 via a network 708.
  • the communication resources 730 may include wired communication components (e.g., for coupling via a Universal Serial Bus (USB)), cellular
  • NFC components NFC components
  • Bluetooth® components e.g., Bluetooth® Low Energy
  • Wi-Fi® components Wi-Fi components
  • Instructions 750 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 710 to perform any one or more of the methodologies discussed herein.
  • the instructions 750 may reside, completely or partially, within at least one of the processors 710 (e.g., within the processor's cache memory), the memory/storage devices 720, or any suitable combination thereof.
  • any portion of the instructions 750 may be transferred to the hardware resources 700 from any combination of the peripheral devices 704 or the databases 706.
  • the memory of processors 710, the memory/storage devices 720, the peripheral devices 704, and the databases 706 are examples of computer-readable and machine- readable media. Examples
  • Example 1 An apparatus for a user equipment (UE), comprising: one or more data storage devices; and one or more processors operably coupled to the one or more data storage devices and configured to: determine a value of a signal quality parameter of beams carrying signals received from cells of a cellular data network; cause the one or more data storage devices to store the value for a selected predetermined number of the beams of each of the cells, based on the value; select one of the beams of each of the cells based on the value if multiple beams carry a reference channel to be measured in the cells; rank the cells based on the value of the selected beam of each of the cells; and select one of the cells for cell reselection based on the rank of the cells if a difference between the value of the signal quality parameter for the selected one of the cells and the value of the signal quality parameter for other cells exceeds a predetermined offset value.
  • UE user equipment
  • Example 2 The apparatus of Example 1 , wherein the one or more processors are configured to determine the value of the signal quality parameter by measuring the value of the signal quality parameter for each of the beams.
  • Example 3 The apparatus according to any one of Examples 1 and 2, wherein the signal quality parameter comprises at least one parameter selected from the group consisting of a received signal power level, a received signal to noise ratio, a received signal to interference ratio, a channel quality parameter, and a bit error rate.
  • Example 4 The apparatus according to any one of Examples 1 -3, wherein cells include a serving cell and neighboring cells.
  • Example 5 The apparatus according to any one of Examples 1 -4, wherein, if the difference between the value for the selected one of the cells and the value for the other cells does not exceed the predetermined offset value, the one or more processors are configured to: rank the cells based on a mean of the value for each of the selected predetermined number of the beams; and select a cell for reselection based on the rank of the cells based on the mean.
  • Example 6 The apparatus of Example 5, wherein the one or more processors are configured to rank the cells based on the mean by ranking the cellular base stations according to an R criterion.
  • Example 7 The apparatus according to any one of Examples 1 -6, wherein the one or more processors are configured to rank the cells based on the value for a best beam of each of the cells by checking, for each of the cells, if an S criterion is met with the best beam thereof, and ranking the cells according to an R criterion of the best beam thereof.
  • Example 8 The apparatus according to any one of Examples 1 -7, wherein the one or more processors are configured to consider a second-highest ranked cell for cell reselection if it is not allowed for the UE to camp on the selected one of the cells.
  • Example 9 The apparatus according to any one of Examples 1 -8, wherein the one or more processors are configured to extract data indicating the selected predetermined number of the beams from a message received from a cellular base station of a serving cell.
  • Example 10 The apparatus according to any one of Examples 1 -9, wherein the one or more processors are configured to extract data indicating the predetermined offset value from a message received from a cellular base station of a serving cell.
  • Example 1 1 The apparatus according to any one of Examples 9 and 10, wherein the message received from the cellular base station of the serving cell comprises a system information message.
  • Example 12 The apparatus according to any one of Examples 9 and 10, wherein the message received from the cellular base station of the serving cell comprises a Radio Resource Control (RRC) message.
  • RRC Radio Resource Control
  • Example 13 A computer-readable storage medium having computer- readable instructions stored thereon, the computer-readable instructions configured to instruct one or more processors to: measure a value of a signal parameter for a predetermined number of beams of each of a plurality cells corresponding to a plurality of cells of a cellular data network; determine whether an S criterion is met with a best measured value of each cell; rank those of the plurality of cells that are determined to meet the S criterion according to an R criterion with the best measured value for each cell; determine whether a value corresponding to a highest ranked cell is better than a value of a second-highest ranked cell by a predetermined offset value; select the highest ranked cell for cell reselection if the value
  • predetermined offset value re-rank those of the plurality of cells having values corresponding thereto that are within the predetermined offset value from the value of the highest ranked cell according to the R criterion with a mean of the value for the predetermined number of beams; and select a highest re-ranked cell for cell reselection.
  • Example 14 The computer-readable storage medium of Example 13, wherein the computer readable instructions are configured to instruct the one or more processors to consider the second-highest ranked cell for reselection if it is not allowed to camp on the selected one of the highest ranked cell or the highest re-ranked cell.
  • Example 15 The computer-readable storage medium according to any one of Examples 13 and 14, wherein the predetermined number of beams is received from one of the plurality of cells.
  • Example 16 The computer-readable storage medium according to any one of Examples 13-15, wherein the predetermined offset value is received from one of the plurality of cells.
  • Example 17 The computer-readable storage medium according to any one of Examples 13-16, wherein the predetermined number of beams is three beams.
  • Example 18 The computer-readable storage medium according to any one of Examples 13-17, wherein the computer-readable instructions are configured to instruct the one or more processors to, if a number of beams for which one of the plurality of cells has a measured value that is less than the predetermined number of beams, substitute the mean of the value for the predetermined number of beams with a scaled down version of a mean of a value of each of the number of beams for which a measured value is available.
  • Example 19 The computer-readable storage medium of Example 18, wherein a scaling factor for producing the scaled down version of the mean is received from one of the plurality of cells.
  • Example 20 An apparatus for a cellular base station, comprising: a data storage device configured to store: a predetermined offset value for enabling a user equipment (UE) to select a cell for reselection; and a predetermined number of beams that the UE is assigned to use for averaging a signal parameter for each cell in selecting a cell for reselection; and communication equipment configured to: transmit the predetermined offset value and the predetermine number of beams to the UE; and communicate with the UE using beam-sweeping.
  • a data storage device configured to store: a predetermined offset value for enabling a user equipment (UE) to select a cell for reselection; and a predetermined number of beams that the UE is assigned to use for averaging a signal parameter for each cell in selecting a cell for reselection; and communication equipment configured to: transmit the predetermined offset value and the predetermine number of beams to the UE; and communicate with the UE using beam-sweeping.
  • UE user equipment
  • Example 21 The apparatus of Example 20, wherein the beam-sweeping comprises synchronization channel (SCH) and reference signal (RS)
  • SCH synchronization channel
  • RS reference signal
  • Example 22 A method of operating a user equipment (UE), the method comprising: determining a value of a signal quality parameter of beams carrying signals received from cells of a cellular data network; causing one or more data storage devices to store the value for a selected predetermined number of the beams of each of the cells, based on the value; selecting one of the beams of each of the cells based on the value if multiple beams carry a reference channel to be measured in the cells; ranking the cells based on the value of the selected beam of each of the cells; and selecting one of the cells for cell reselection based on the rank of the cells if a difference between the value of the signal quality parameter for the selected one of the cells and the value of the signal quality parameter for other cells exceeds a predetermined offset value.
  • UE user equipment
  • Example 23 The method of Example 22, wherein determining a value of a signal quality parameter comprises measuring the value of the signal quality parameter for each of the beams.
  • Example 24 The method according to any one of Examples 22 and 23, wherein determining a value of a signal quality parameter comprises determining at least one parameter selected from the group consisting of a received signal power level, a received signal to noise ratio, a received signal to interference ratio, a channel quality parameter, and a bit error rate.
  • Example 25 The method according to any one of Examples 22-24, wherein determining a value of a signal quality parameter of beams carrying signals received from cells of a cellular data network comprises determining the value of the signal quality parameter of the beams carrying signals received from a serving cell and neighboring cells.
  • Example 26 The method according to any one of Examples 22-25, wherein, if the difference between the value for the selected one of the cells and the value for the other cells does not exceed the predetermined offset value, the method further comprises: ranking the cells based on a mean of the value for each of the selected predetermined number of the beams; and selecting a cell for reselection based on the rank of the cells based on the mean.
  • Example 27 The method of Example 26, wherein ranking the cells based on the mean comprises ranking the cellular base stations according to an R criterion.
  • Example 28 The method according to any one of Examples 22-27, wherein ranking the cells based on the value of the selected beam of each of the cells comprises checking, for each of the cells, if an S criterion is met with a best beam thereof, based on the value, and ranking the cells according to an R criterion of the best beam thereof.
  • Example 29 The method according to any one of Examples 22-28, further comprising considering a second-highest ranked cell for cell reselection if it is not allowed for the UE to camp on the selected one of the cells.
  • Example 30 The method according to any one of Examples 22-29, further comprising extracting data indicating the selected predetermined number of the beams from a message received from a cellular base station of a serving cell.
  • Example 31 The method according to any one of Examples 22-30, further comprising extracting data indicating the predetermined offset value from a message received from a cellular base station of a serving cell.
  • Example 32 The method according to any one of Examples 30 and 31 , wherein the message received from the cellular base station of the serving cell comprises a system information message.
  • Example 33 The method according to any one of Examples 30 and 31 , wherein the message received from the cellular base station of the serving cell comprises a Radio Resource Control (RRC) message.
  • RRC Radio Resource Control
  • Example 34 A method of operating a user equipment (UE), the method comprising: measuring a value of a signal parameter for a predetermined number of beams of each of a plurality cells of a cellular data network; determining whether an S criterion is met with a best measured value of each cell; ranking those of the plurality of cells that are determined to meet the S criterion according to an R criterion with the best measured value for each cell; determining whether a value corresponding to a highest ranked cell is better than a value of a second-highest ranked cell by a predetermined offset value; selecting the highest ranked cell for cell reselection if the value corresponding thereto is better than the value of the second- highest ranked cell by the predetermined offset value; and if the value corresponding to the highest ranked cell is not better than the value of the second-highest ranked cell by the predetermined offset value: re-ranking those of the plurality of cells having values corresponding thereto that are within the predetermined offset value
  • Example 35 The method of Example 34, further comprising considering the second highest ranked cell for reselection if it is not allowed to camp on the selected one of the highest ranked cell or the highest re-ranked cell.
  • Example 36 The method according to any one of Examples 34 and 35, further comprising receiving data indicating the predetermined number of beams from one of the plurality of cells.
  • Example 37 The method according to any one of Examples 34-36, further comprising receiving data indicating the predetermined offset value from one of the plurality of cells.
  • Example 38 The method according to any one of Examples 34-37, wherein the predetermined number of beams is three beams.
  • Example 39 The method according to any one of Examples 34-38, wherein if a number of beams for which one of the plurality of cells has a measured value that is less than the predetermined number of beams, substituting the mean of the value for the predetermined number of beams with a scaled down version of a mean of a value of each of the number of beams for which a measured value is available.
  • Example 40 The method of Example 39, further comprising receiving data indicating a scaling factor for producing the scaled down version of the mean from one of the plurality of cells.
  • Example 41 A method of operating a cellular base station, the method comprising: storing a predetermined offset value for enabling a user equipment (UE) to select a cell for reselection; storing a predetermined number of beams that the UE is assigned to use for averaging a signal parameter for each cell in selecting a cell for reselection; transmitting the predetermined offset value and the predetermine number of beams to the UE; and communicating with the UE using beam-sweeping.
  • UE user equipment
  • Example 42 The method of Example 41 , wherein communicating with the UE using beam sweeping comprises communicating with the UE using
  • SCH synchronization channel
  • RS reference signal
  • Example 43 At least one computer-readable storage medium having computer readable instructions stored thereon, the computer-readable instructions configured to instruct one or more processors to perform at least a portion of the method according to any one of Examples 22-42.
  • Example 44 A means for performing at least a portion of the method according to any one of Examples 22-42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des appareils de resélection de cellule dans une communication basée sur un faisceau. Un équipement utilisateur (UE) est configuré pour déterminer la valeur d'un paramètre de qualité de signal de faisceaux transportant des signaux reçus en provenance de cellules d'un réseau de données cellulaire, et stocker la valeur d'un nombre prédéterminé sélectionné de faisceaux pour chacune des cellules, sur la base de la valeur. L'UE est également configuré pour sélectionner un des faisceaux de chacune des cellules sur la base de la valeur si de multiples faisceaux transportent un canal de référence à mesurer dans les cellules, classer les cellules sur la base de la valeur du faisceau sélectionné de chacune des cellules, et sélectionner l'une des cellules pour une resélection de cellule sur la base du classement des cellules, si une différence entre la valeur de la cellule sélectionnée parmi les cellules et la valeur des autres cellules dépasse une valeur de décalage prédéterminée.
PCT/US2017/054250 2016-10-26 2017-09-29 Resélection de cellule dans une communication basée sur un faisceau Ceased WO2018080723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662413271P 2016-10-26 2016-10-26
US62/413,271 2016-10-26

Publications (1)

Publication Number Publication Date
WO2018080723A1 true WO2018080723A1 (fr) 2018-05-03

Family

ID=60083495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2017/054250 Ceased WO2018080723A1 (fr) 2016-10-26 2017-09-29 Resélection de cellule dans une communication basée sur un faisceau

Country Status (1)

Country Link
WO (1) WO2018080723A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019003059A1 (fr) * 2017-06-26 2019-01-03 Nokia Technologies Oy Classement de cellules dans un système multi-faisceau
CN110831080A (zh) * 2018-08-09 2020-02-21 华为技术有限公司 确定目标小区的方法和装置
CN113632542A (zh) * 2019-03-20 2021-11-09 三星电子株式会社 用于在无线通信系统中执行小区重选的方法和装置
EP3925282A1 (fr) * 2019-02-14 2021-12-22 Telefonaktiebolaget LM Ericsson (publ.) Procédé, noeud et ue pour initier un transfert intercellulaire
US12022344B2 (en) 2016-05-05 2024-06-25 Nokia Technologies Oy Cell ranking in multi beam system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160262077A1 (en) * 2015-03-05 2016-09-08 Mediatek (Beijing) Inc. Methods and apparatus for cell selection/reselection in millimeter wave system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160262077A1 (en) * 2015-03-05 2016-09-08 Mediatek (Beijing) Inc. Methods and apparatus for cell selection/reselection in millimeter wave system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL: "Idle mode support in NR", vol. RAN WG2, no. Kaohsiung; 20161010 - 20161014, 9 October 2016 (2016-10-09), XP051151414, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN2/Docs/> [retrieved on 20161009] *
MEDIATEK INC: "IDLE mode operation in NR", vol. RAN WG2, no. Kaohsiung, Taiwan; 20161010 - 20161014, 9 October 2016 (2016-10-09), XP051150725, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN2/Docs/> [retrieved on 20161009] *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12022344B2 (en) 2016-05-05 2024-06-25 Nokia Technologies Oy Cell ranking in multi beam system
WO2019003059A1 (fr) * 2017-06-26 2019-01-03 Nokia Technologies Oy Classement de cellules dans un système multi-faisceau
US11856467B2 (en) 2017-06-26 2023-12-26 Nokia Technologies Oy Cell ranking in multi beam system
CN110831080A (zh) * 2018-08-09 2020-02-21 华为技术有限公司 确定目标小区的方法和装置
EP3925282A1 (fr) * 2019-02-14 2021-12-22 Telefonaktiebolaget LM Ericsson (publ.) Procédé, noeud et ue pour initier un transfert intercellulaire
CN113632542A (zh) * 2019-03-20 2021-11-09 三星电子株式会社 用于在无线通信系统中执行小区重选的方法和装置
US12477417B2 (en) 2019-03-20 2025-11-18 Samsung Electronics Co., Ltd. Method and apparatus for performing cell reselection in wireless communication system

Similar Documents

Publication Publication Date Title
US11895547B2 (en) Network controlled small gap configuration
US12382408B2 (en) Random access procedures based on physical downlink control channel (PDDCH) orders
US20190373573A1 (en) Location positioning protocol based positioning for ues in idle mode
US20190230550A1 (en) Measurement objects in a new radio (nr) system
US12389320B2 (en) Energy savings for 5G networks
US11831494B2 (en) UE (user equipment) assisted measurement gap in NR (new radio)
US20240196236A1 (en) Physical-layer cell identifier (pci) configuration and mobility robustness optimization for fifth generation self-organizing networks (5g son)
WO2018144781A1 (fr) Mesure de rsrp pour norme nouvelle radio
US11855709B2 (en) Radio link monitoring (RLM) enhancements
WO2018144936A1 (fr) Attribution de ressources de liaison montante sur la base de classes de puissance d&#39;équipement utilisateur
US20210385681A1 (en) Measurement Gap Enhancements
EP3456070B1 (fr) Augmentation de la capacité spectrale d&#39;une cellule embms lorsqu&#39;elle est déployée en tant que porteuse de liaison descendante supplémentaire
WO2018080723A1 (fr) Resélection de cellule dans une communication basée sur un faisceau
KR102650125B1 (ko) 연결성 향상
US12133120B2 (en) Command handling for simultaneous connectivity handoffs
WO2018144670A1 (fr) Mesures à large bande dans des systèmes de nouvelle radio
WO2018089930A1 (fr) Systèmes, procédés et dispositifs d&#39;identification de cellule à grande vitesse
US20250056363A1 (en) Radio resource management relaxation for user equipment based on mobility state
WO2022236645A1 (fr) Mesure rapide avec de multiples faisceaux simultanés
WO2024031284A1 (fr) Amélioration sur une resélection de cellule de tn et de ntn
US12058573B2 (en) Delay requirements determination for handover with primary secondary cell
US20230092295A1 (en) Smtc2-lp based rrm enhancement
WO2024065504A1 (fr) Resélection de cellule pour atg
US20240251307A1 (en) Cell reselection

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17784142

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17784142

Country of ref document: EP

Kind code of ref document: A1