WO2020064229A1 - Bwp information coordination - Google Patents

Bwp information coordination Download PDF

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Publication number
WO2020064229A1
WO2020064229A1 PCT/EP2019/072446 EP2019072446W WO2020064229A1 WO 2020064229 A1 WO2020064229 A1 WO 2020064229A1 EP 2019072446 W EP2019072446 W EP 2019072446W WO 2020064229 A1 WO2020064229 A1 WO 2020064229A1
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WO
WIPO (PCT)
Prior art keywords
synchronization signal
signal block
serving cell
cell
activation
Prior art date
Application number
PCT/EP2019/072446
Other languages
French (fr)
Inventor
Srinivasan Selvaganapathy
Guillaume DECARREAU
Rajesh BANDA
Original Assignee
Nokia Technologies Oy
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.)
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Publication date
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Publication of WO2020064229A1 publication Critical patent/WO2020064229A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to coordination of information on BWPs.
  • 3GPP Rel-15 specifications introduce New Radio interface which mainly supports three functions, namely enhanced mobile broadband, ultra-reliable-low latency communication, and massive MTC (machine type communication). All these functions are supported over a single radio interface with flexibility to configure all the services independently within the cell.
  • Next Generation core network and Next Generation Radio network architecture and interfaces also specified to support the above functions of 5G systems.
  • NR Air-interface it is possible to support multiple UE specific bandwidths part within the complete cell bandwidth to dynamically accommodate the UE in different positions within the cell bandwidth. For a given UE, more than one bandwidth part may be assigned with possibility to dynamically switch between the BWP (see 3GPP TS 38.300).
  • FR1 i.e. a frequency range between 450 and 6000 MHz
  • only a limited bandwidth up to 50 MHz is allocated for NR operations.
  • the number of possible locations for BWPs within the cell’s BWP is limited for effective resource utilization.
  • the number of BWPs and their sizes to be supported can be preconfigured.
  • NR-ARFCN indicates the starting point of common RB. Point A.
  • an apparatus comprising means for obtaining configured to obtain, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block; means for providing configured to provide an association to a serving cell, wherein the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
  • an apparatus comprising means for monitoring configured to monitor if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell; means for associating configured to associate, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; means for deciding configured to decide based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
  • an apparatus comprising means for obtaining configured to obtain an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; means for informing configured to inform a serving cell on the activation indication.
  • an apparatus comprising means for monitoring configured to monitor if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; means for configuring configured to configure a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
  • an apparatus comprising means for monitoring configured to monitor if a control information on a measurement configuration is received in a medium access control packet data unit; means for configuring configured to configure the measurement configuration based on the control information if the control information is received.
  • a method comprising obtaining, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block; providing an association to a serving cell, wherein the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
  • a method comprising monitoring if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell; associating, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; deciding based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
  • a method comprising obtaining an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; informing a serving cell on the activation indication.
  • a ninth aspect of the invention there is provided a method, comprising monitoring if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; configuring a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
  • a method comprising monitoring if a control information on a measurement configuration is received in a medium access control packet data unit; configuring the measurement configuration based on the control information if the control information is received.
  • Each of the methods of the sixth to tenth aspects may be a method of bandwidth part information coordination.
  • a computer program product comprising a set of instructions which, when executed on an apparatus, is configured to cause the apparatus to carry out the method according to any of the sixth to tenth aspects.
  • the computer program product may be embodied as a computer-readable medium or directly loadable into a computer.
  • Fig. 1 shows a message sequence for Xn setup according to some example embodiments of the invention
  • Fig. 2 shows a method for target cell selection for a handover according to some example embodiments of the invention
  • Fig. 3 shows a method for updating a measurement configuration according to an example embodiment of the invention
  • Fig. 4 shows an apparatus according to an example embodiment of the invention
  • Fig. 5 shows a method according to an example embodiment of the invention
  • Fig. 6 shows an apparatus according to an example embodiment of the invention
  • Fig. 7 shows a method according to an example embodiment of the invention
  • Fig. 8 shows an apparatus according to an example embodiment of the invention
  • Fig. 9 shows a method according to an example embodiment of the invention.
  • Fig. 10 shows an apparatus according to an example embodiment of the invention
  • Fig. 1 1 shows a method according to an example embodiment of the invention
  • Fig. 12 shows an apparatus according to an example embodiment of the invention
  • Fig. 13 shows a method according to an example embodiment of the invention.
  • Fig. 14 shows an apparatus according to an example embodiment of the invention.
  • the apparatus is configured to perform the corresponding method, although in some cases only the apparatus or only the method are described.
  • Some example embodiments of the invention provide enhancements to the Xn interface between NR nodes (gNBs) to support co-ordination of BWP configurations across the cells and enable better connected mode mobility performance for UE operating with different band-width parts dynamically at different positions within cell bandwidth.
  • gNBs NR nodes
  • a NR cell supports operation for specific BWP or not and also, the number of BWP for each BWP supported in the current cell are not known to the neighbour-cells. These pieces of information may be relevant the serving cell to decide on selecting a suitable target cell capable of supporting the ongoing traffic of UE in the serving cells and also the BWP supported by UE.
  • the BWP(s) are configured in a dedicated manner to the UE, but an indication of the BWP that will be used and also the purpose of this BWP is useful for the serving cell (source gNB) when triggering an HO to the target cell.
  • the connected mode mobility between NR cells may be based on measurements over the Sync-Signal-block (SSB) within the cell bandwidth.
  • SSB Sync-Signal-block
  • the definition of SSB is: SS/PBCH block: Synchronization Signals / PBCH block.
  • each measurement object is configured with SSB frequency and its timing information so that UE can check for the SSB on the specific frequency on the corresponding measurement time window.
  • the SSB transmissions of neighbour-cells change dynamically to support the measurements within active BWP, the corresponding changes also should be communicated to UE, e.g. via RRC signalling.
  • this information is sent to LTE node (eNB) so that LTE node can provide this information via LTE RRC signalling to UE.
  • eNB LTE node
  • LTE RRC signalling For dynamically changing SSB locations, this mechanism is not efficient.
  • the signalling according to current NR specifications does not allow signalling different PCIs for the SSBs, and it doesn’t give information about the BWP that will be associated with the SSB.
  • Some example embodiments of the invention provide a solution to at least one of these problems.
  • a number of BWP possible within the cell bandwidth for different bandwidths are exchanged between NR nodes (gNBs) along with additional information about the services corresponding to each of the bandwidth part.
  • gNBs NR nodes
  • a cell with a maximum bandwidth of 50 MHz may indicate the BWP parts it supports within these 50 MHz to neighbour cells, such as 5 MHz, 10 MHz ,20 MHz and 40 MHz and the service type information corresponding to each of these BWPs such as of eMBB, URLLC or tactile etc...
  • the selection of gNB may happen based on the service type in some cases.
  • the respective possible location of the bandwidth start may also be provided.
  • the neighbour gNB may use this information about the cell when configuring the measurement report in the UE, and also while deciding the target-cell for connected mode handover.
  • the following changes to current specifications are foreseen to implement a method to exchange possible BWP configurations of neighbour cell with serving cell.
  • the services (service type) and/or information on a QoS parameter (such as expected throughput, latency, and/or jitter) are also included.
  • a QoS parameter such as expected throughput, latency, and/or jitter
  • gNB1 requests setup of Xn interface to gNB2 by XN-SETUP-REQ (S15).
  • gNB1 provides information on the supported smaller BWPs (i.e., the potential sizes thereof), and for each of the sizes of the smaller BWPs, it provides potential BWP locations, information on the supported service type (e.g. best effort, real time, URLLC, etc.), and the expected throughput (or other QoS parameters, like delay, jitter, etc.).
  • the supported service type e.g. best effort, real time, URLLC, etc.
  • the expected throughput or other QoS parameters, like delay, jitter, etc.
  • it may provide for each of the smaller BWPs an indication whether or not it supports CA, and/or of the network slices that are supported.
  • the setup request message may comprise an MTC container indicating whether or not a certain SSB is static (i.e. permanently transmitted) or not (i.e. semi-static or dynamic).
  • a certain SSB is static (i.e. permanently transmitted) or not (i.e. semi-static or dynamic).
  • it may additionally comprise a PCI.
  • gNB2 In response to XN-SETUP-REQ, gNB2 provides in XN-SETUP-RES corresponding parameters for its cell to gNB1 (S16).
  • corresponding information may be exchanged between gNB1 and gNB2 when the Xn interface between them is updated.
  • the gNBs may exchange corresponding information by dedicated messages, separately from setting up or updating the Xn interface.
  • the serving cell may take the information on the BWPs of the neighbour cell (a cell of the other one of gNB1 and gNB2) into account. This is shown in Fig. 2.
  • gNB of serving cell receives a measurement report for the neighbor cell from UE (S25).
  • the measurement report is related to a SSB.
  • QoS parameter e.g. expected throughput
  • gNB obtains information on the BWP (size, location), service type, and QoS parameter (S26).
  • the serving cell may decide whether or not the terminal should handover to the neighbor cell (S27).
  • the serving cell when deciding on the handover, may not take into account at least one of the location, size, and support for CA of the BWP. I.e., the serving cell decides the appropriate target cell based on only one or both of the service type and the QoS parameter.
  • the gNBs need not to exchange information on the at least one of location, size, and support for CA of the BWP. I.e., in these example embodiments, among the information exchanged according to Fig. 1 , the gNBs may only exchange information on at least one of the service type and QoS parameter of the BWP and the SSB associated to the BWP.
  • the information exchanged between the gNBs at setup or update of the Xn interface need not to comprise the MTC container.
  • gNB1 provides the same parameters to gNB2 as the parameters that gNB2 provides to gNB1 at setup or update of the Xn interface (or in a dedicated message) (see e.g. Fig. 1 ). However, this is not mandatory.
  • One gNB may provide a subset of the parameters it receives from the other gNB.
  • the parameters provided from one gNB to the other gNB may be partly or fully disjoint from the parameters provided from the other gNB to the one gNB.
  • one gNB does not provide any parameters to the other gNB while the other gNB provides the indications of the SSB and one or both of the associated service type and QoS parameter to the one gNB.
  • the QoS parameter(s) provided by one gNB may be the same or different from the QoS parameter(s) provided by the other gNB.
  • each gNB may act only according to the parameters it receives from the its neighbor gNB. For example, if in some example embodiments of the invention gNB1 receives the indications of the SSB and one or both of the associated service type and QoS parameter from gNB2 but gNB1 does not provide these parameters to gNB2, gNB1 may perform selection of a target cell according to some example embodiments of the invention but gNB2 may not perform such selection of a target cell.
  • gNB1 may select the target cell based on the service type but not based on the QoS parameter while gNB2 may select the target cell based on the QoS parameter but not based on the service type.
  • the neighbour cell informs the serving cell for each SSB whether or not transmission of the respective SSB is activated, for example by a new Xn Message Xn-NG-NODE-DYNAMIC-SSB-CONFIG-UPDATE message. If the transmission of a SSB is activated, the SSB may be denoted as an “active SSB” hereinafter.
  • the new Xn message provides a bitmap of active SSBs is provided. Alternatively or in addition to the bitmap, the Xn message may comprise a corresponding MTC configuration information.
  • gNB of the serving cell configures the measurement control message for the UE
  • gNB of the serving cell refers to the latest bitmap (or MTC configuration) received from neighbor- cells such that it configures the UE to measure only active SSBs.
  • gNB monitors if the activation status of a SSB changes, e.g. by comparing the previously received bitmap with the currently received bitmap. If such a change is detected and a UE in connected mode is configured for measuring the respective SSB, gNB of the serving cell may provide update information to the UE instead of completely reconfiguring the measurement configuration. The update information may be provided to the UE as an additional MAC control element in the ongoing data transmission. Thus, additional RRC signaling for all connected UEs to update the measurement configuration is avoided.
  • measurement configurations are optimised because the UE knows the active SSBs in the neighbour cell, which can be used for measurements.
  • BWP of neighbour-cell is active and is at same frequency as that of serving cell
  • SSB based measurements can be completed without using interfrequency measurement which is more difficult to achieve than intra-frequency measurement.
  • the new Xn message (or a corresponding dedicated message between the gNBs) indicates a PCI for the SSB
  • gNB of the serving cell informs UE on the PCI for the SSB.
  • the Measurement Gaps can be configured only if the UE reports no cells on SSB on the active BWP. If UE does not find any SSB of neighboring cell to measure in the frequency of the active BWP, then interfrequency measurement needs to be configured, using Measurement Gap.
  • all SSBs are treated in a same way.
  • the activation of one or more SSBs may be static, i.e., the transmission of these SSB(s) is always activated.
  • the Xn message exchanged at setup or update of the Xn interface (or a corresponding dedicated message) may indicate whether or not the activation of the SSB is static (see the MTC container in Fig. 1 ).
  • the bitmap transferred from gNB of the neighbour cell to gNB of the serving cell may not comprise a bit for one or more of the cells the activation of which is not static. Thus, signalling effort may be reduced.
  • the MTC information element (MTC container in Fig. 1 ) within Xn-SETUP-REQ /RES message includes for each SSB an additional parameter whether the activation of the SSB transmission is static or dynamic.
  • the activation of the SSB transmission may be dynamic if the SSB is linked to a specific BWP.
  • the MTC information element may additionally comprise for each SSB PCI information if a single CGI maps to multiple PCIs.
  • RRC Measurement control message configuring NR-Measurement objects includes additional parameter for SSB indicating whether or not it is always active.
  • new MAC CE Information on SSB-Update which indicates the latest status of SSB. It may also comprise the modified PCI-list for the SSB.
  • a new Measurement Event can be configured. This measurement event will be triggered if UE doesn’t find any SSB in a given frequency (except the SSB of the active BWP in case of intra frequency). If there is no SSB of neighbouring cell, the network will configure interfrequency measurement using Meaurement gap.
  • Fig. 3 shows a method according to an example embodiment of the invention.
  • gNB1 (of the neighbor cell) sends to gNB2 Xn-SSB-CONFIG-UPDATE message which comprises a bitmap indicating the active SSBs (S35).
  • S35 active SSBs
  • gNB1 may comprise information on PCI and CGI, in particular if one CGI is associated with plural PCIs.
  • gNB1 may send this message each time when one of the pieces of information comprised in the message changes. In addition or alternatively, it may send the message periodically.
  • gNB2 When gNB2 receives the Xn-SSB-CONFIG-UPDATE message, it may use it to reconfigure the measurement configurations in the UE (S36). In particular for UEs in connected mode which are already configured with a measurement configuration (received the measurement control information), gNB2 may inform the UE on the update by a new CE in a MAC PDU (S37, S38).
  • Fig. 4 shows an apparatus according to an example embodiment of the invention.
  • the apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof.
  • Fig. 5 shows a method according to an example embodiment of the invention.
  • the apparatus according to Fig. 4 may perform the method of Fig. 5 but is not limited to this method.
  • the method of Fig. 5 may be performed by the apparatus of Fig. 4 but is not limited to being performed by this apparatus.
  • the apparatus comprises means for obtaining 10 and means for providing 20.
  • the means for obtaining 10 and means for providing 20 may be an obtaining means and providing means, respectively.
  • the means for obtaining 10 and means for providing 20 may be an obtainer and a provider, respectively.
  • the means for obtaining 10 and means for providing 20 may be an obtaining processor and providing processor, respectively.
  • the means for obtaining 10 obtains, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a QoS parameter (e.g. expected throughput, expected latency, and/or expected jitter) associated to the synchronization signal block (S10).
  • the synchronization signal block may be associated to a bandwidth part.
  • the means for providing 20 provides an association to a serving cell (S20).
  • the association indicates that the at least one of the service type and the QoS parameter is associated to the synchronization signal block.
  • the serving cell may be different from the neighbor cell.
  • Fig. 6 shows an apparatus according to an example embodiment of the invention.
  • the apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof.
  • Fig. 7 shows a method according to an example embodiment of the invention.
  • the apparatus according to Fig. 6 may perform the method of Fig. 7 but is not limited to this method.
  • the method of Fig. 7 may be performed by the apparatus of Fig. 6 but is not limited to being performed by this apparatus.
  • the apparatus comprises means for monitoring 1 10, means for associating 120, and means for deciding 130.
  • the means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitoring means, associating means, and deciding means, respectively.
  • the means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitor, associator, and decider, respectively.
  • the means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitoring processor, associating processor, and deciding processor, respectively.
  • the means for monitoring 1 10 monitors if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell (S1 10).
  • the serving cell may be different from the neighbor cell.
  • the means for associating 120 associates at least one of a service type and a QoS parameter (e.g. expected throughput, expected latency, and/or expected jitter) to the synchronization signal block (S120).
  • the association is made based on an association of the at least one of the service type and the QoS parameter to the synchronization signal block received from the neighbor cell.
  • the means for deciding 130 decides, based on the at least one of the service type and the QoS parameter, whether or not the terminal is to be handed over to the neighbor cell (S130).
  • Fig. 8 shows an apparatus according to an example embodiment of the invention.
  • the apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof.
  • Fig. 9 shows a method according to an example embodiment of the invention.
  • the apparatus according to Fig. 8 may perform the method of Fig. 9 but is not limited to this method.
  • the method of Fig. 9 may be performed by the apparatus of Fig. 8 but is not limited to being performed by this apparatus.
  • the apparatus comprises means for obtaining 210 and means for informing 220.
  • the means for obtaining 210 and means for informing 220 may be an obtaining means and informing means, respectively.
  • the means for obtaining 210 and means for informing 220 may be an obtainer and an informer, respectively.
  • the means for obtaining 210 and means for informing 220 may be an obtaining processor and informing processor, respectively.
  • the means for obtaining 210 obtains an activation indication (S210).
  • the activation indication indicates if a transmission of a synchronization signal block is activated in a neighbor cell.
  • the means for informing 220 informs a serving cell on the activation indication (S220).
  • the serving cell may be different from the neighbor cell.
  • Fig. 10 shows an apparatus according to an example embodiment of the invention.
  • the apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof.
  • Fig. 1 1 shows a method according to an example embodiment of the invention.
  • the apparatus according to Fig. 10 may perform the method of Fig. 1 1 but is not limited to this method.
  • the method of Fig. 1 1 may be performed by the apparatus of Fig. 10 but is not limited to being performed by this apparatus.
  • the apparatus comprises means for monitoring 310 and means for configuring 320.
  • the means for monitoring 310 and means for configuring 320 may be a monitoring means and configuring means, respectively.
  • the means for monitoring 310 and means for configuring 320 may be a monitor and a configurator, respectively.
  • the means for monitoring 310 and means for configuring 320 may be a monitoring processor and configuring processor, respectively.
  • the means for monitoring 310 monitors if a serving cell receives an activation indication (S310).
  • the activation indication indicates if a transmission of a synchronization signal block is activated in a neighbor cell.
  • the serving cell may be different from the neighbor cell.
  • the means for configuring 320 configures a measurement configuration of a terminal served by the serving cell based on the activation indication (S320).
  • Fig. 12 shows an apparatus according to an example embodiment of the invention.
  • the apparatus may be a control unit which may be implemented in a terminal (e.g. UE) or an element thereof.
  • Fig. 13 shows a method according to an example embodiment of the invention.
  • the apparatus according to Fig. 12 may perform the method of Fig. 13 but is not limited to this method.
  • the method of Fig. 13 may be performed by the apparatus of Fig. 12 but is not limited to being performed by this apparatus.
  • the apparatus comprises means for monitoring 410 and means for configuring 420.
  • the means for monitoring 410 and means for configuring 420 may be a monitoring means and configuring means, respectively.
  • the means for monitoring 410 and means for configuring 420 may be a monitor and a configurator respectively.
  • the means for monitoring 410 and means for configuring 420 may be a monitoring processor and configuring processor, respectively.
  • Fig. 14 shows an apparatus according to an example embodiment of the invention.
  • the apparatus comprises at least one processor 810, at least one memory 820 including computer program code, and the at least one processor 810, with the at least one memory 820 and the computer program code, being arranged to cause the apparatus to at least perform at least one of the methods according to Figs. 5, 7, 9, 1 1 , and 13.
  • 3GPP network e.g. E-UTRAN or NR
  • 3G, 4G, 5G, etc. 3G, 4G, 5G, etc.
  • the invention is not limited to 3GPP networks. It may be applied to other radio networks with bandwidth parts and/or dynamic SSB.
  • a UE is an example of a terminal.
  • the terminal may be any device capable to connect to the radio network such as a MTC device, a D2X device etc.
  • a cell may be represented by the base station serving the cell.
  • the base station (cell) may be connected to an antenna (array) serving the cell by a Remote Radio Head.
  • Some example embodiments of the invention may be deployed in the Remote Radio Head.
  • a base station may be realized as a combination of a central unit (one for plural base stations) and a distributed unit (one per base station). The central unit may be employed in the cloud.
  • One piece of information may be transmitted in one or plural messages from one entity to another entity. Each of these messages may comprise further (different) pieces of information.
  • Names of network elements, protocols, and methods are based on current standards. In other versions or other technologies, the names of these network elements and/or protocols and/or methods may be different, as long as they provide a corresponding functionality.
  • each of the entities described in the present description may be based on a different hardware, or some or all of the entities may be based on the same hardware. It does not necessarily mean that they are based on different software. That is, each of the entities described in the present description may be based on different software, or some or all of the entities may be based on the same software.
  • Each of the entities described in the present description may be embodied in the cloud.
  • example embodiments of the present invention provide, for example, a base station (e.g. a gNB or eNB,) or a cell thereof, or a component thereof, an apparatus embodying the same, a method for controlling and/or operating the same, and computer program(s) controlling and/or operating the same as well as mediums carrying such computer program(s) and forming computer program product(s).
  • Implementations of any of the above described blocks, apparatuses, systems, techniques or methods include, as non-limiting examples, implementations as hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.

Abstract

It is provided a method, comprising monitoring if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell; associating, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; deciding based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.

Description

BWP information coordination
Field of the invention
The present invention relates to coordination of information on BWPs.
Abbreviations
3GPP 3rd Generation Partnership Project
4G / 5G 4th / 5th Generation
ACK Acknowledge
BS Base Station
BWP Bandwidth part
CA Carrier Aggregation
CE Control Element
CGI Cell Global Identifier
DL Downlink
ECGI E-UTRAN Cell Global Identifier
eMBB enhanced Mobile BroadBand
EN-DC E-UTRAN - New Radio Dual Connectivity
E-UTRAN Evolved UTRAN
FR Frequency Range
gNB Base Station in 5G/NR
HO Handover
ID Identity
LTE Long Term Evolution
MAC Medium Access Control
MTC Machine Type Communication
MTC Measurement Timing Configuration
NR New Radio (air interface standard of 5G systems)
NR-ARFCN NR Absolute Radio-Frequency Channel Number
NR-CGI NR CGI
NR-PCI NR PCI PBCH Physical Broadcast Channel
PCI Physical Cell Identifier
PRB Physical Resource Block
QCI QoS Class Indicator
QoS Quality of Service
RAN Radio Access Network
RANAC Radio Access Network Notification Area Code
RB Resource Block
Rel Release
RRC Radio Resource Control
SMTC SS/PBCH Block Measurement Time Configuration
SS Synchronization Signal
SSB Synchronization Signal Block
TAC Tracking Area Code
TDD Time Division Duplex
TS Technical Specification
UE User Equipment
UL Uplink
URLLC Ultra-Reliable Low-Latency Communications
UTRAN Universal Terrestrial RAN
Xn Interface between to gNBs
Background of the invention
3GPP Rel-15 specifications introduce New Radio interface which mainly supports three functions, namely enhanced mobile broadband, ultra-reliable-low latency communication, and massive MTC (machine type communication). All these functions are supported over a single radio interface with flexibility to configure all the services independently within the cell.
Next Generation core network and Next Generation Radio network architecture and interfaces also specified to support the above functions of 5G systems.
With NR Air-interface, it is possible to support multiple UE specific bandwidths part within the complete cell bandwidth to dynamically accommodate the UE in different positions within the cell bandwidth. For a given UE, more than one bandwidth part may be assigned with possibility to dynamically switch between the BWP (see 3GPP TS 38.300). In many of the early deployments of 5G for FR1 (i.e. a frequency range between 450 and 6000 MHz), only a limited bandwidth up to 50 MHz is allocated for NR operations. In such cases, even though multiple UE specific BWPs are possible within the bandwidth for different bandwidth ranges, the number of possible locations for BWPs within the cell’s BWP is limited for effective resource utilization. Moreover, for each cell, the number of BWPs and their sizes to be supported can be preconfigured.
As per the latest Xn specification (3GPP TS 38.300 of 2018-06), the NR cell information exchanged between the NR gNBs is given below:
• NR-PCI
• NR-CGI
• TAC
• RANAC
• UL Frequency Info /UL Bandwidth
• DL Frequency Info / DL Bandwidth
o Freq Info : NR-ARFCN indicates the starting point of common RB. Point A.
• Frequency(ies) and SMTC of the SSB(s) of the Cell
In NR, it is already possible for a gNB to inform its neighbours about different SSBs of a cell (see 3GPP TS 38.324, section 9.2.2.1 1 ; and 3GPP TS 38.331 “MeasurementTimingConfiguration").
Summary of the invention
It is an object of the present invention to improve the prior art.
According to a first aspect of the invention, there is provided an apparatus, comprising means for obtaining configured to obtain, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block; means for providing configured to provide an association to a serving cell, wherein the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
According to a second aspect of the invention, there is provided an apparatus, comprising means for monitoring configured to monitor if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell; means for associating configured to associate, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; means for deciding configured to decide based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
According to a third aspect of the invention, there is provided an apparatus, comprising means for obtaining configured to obtain an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; means for informing configured to inform a serving cell on the activation indication.
According to a fourth aspect of the invention, there is provided an apparatus, comprising means for monitoring configured to monitor if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; means for configuring configured to configure a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
According to a fifth aspect of the invention, there is provided an apparatus, comprising means for monitoring configured to monitor if a control information on a measurement configuration is received in a medium access control packet data unit; means for configuring configured to configure the measurement configuration based on the control information if the control information is received.
According to a sixth aspect of the invention, there is provided a method, comprising obtaining, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block; providing an association to a serving cell, wherein the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
According to a seventh aspect of the invention, there is provided a method, comprising monitoring if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell; associating, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; deciding based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
According to an eighth aspect of the invention, there is provided a method, comprising obtaining an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; informing a serving cell on the activation indication.
According to a ninth aspect of the invention, there is provided a method, comprising monitoring if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell; configuring a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
According to a tenth aspect of the invention, there is provided a method, comprising monitoring if a control information on a measurement configuration is received in a medium access control packet data unit; configuring the measurement configuration based on the control information if the control information is received.
Each of the methods of the sixth to tenth aspects may be a method of bandwidth part information coordination.
According to an eleventh aspect of the invention, there is provided a computer program product comprising a set of instructions which, when executed on an apparatus, is configured to cause the apparatus to carry out the method according to any of the sixth to tenth aspects. The computer program product may be embodied as a computer-readable medium or directly loadable into a computer.
According to some example embodiments of the invention, at least one of the following advantages may be achieved:
• handover performance is improved;
• improved cell selection for handover;
• efficient update of measurement configuration for dynamic SSB;
• signaling effort is reduced; • no impact on UE.
It is to be understood that any of the above modifications can be applied singly or in combination to the respective aspects to which they refer, unless they are explicitly stated as excluding alternatives.
Brief description of the drawings
Further details, features, objects, and advantages are apparent from the following detailed description of the preferred example embodiments of the present invention which is to be taken in conjunction with the appended drawings, wherein:
Fig. 1 shows a message sequence for Xn setup according to some example embodiments of the invention;
Fig. 2 shows a method for target cell selection for a handover according to some example embodiments of the invention;
Fig. 3 shows a method for updating a measurement configuration according to an example embodiment of the invention;
Fig. 4 shows an apparatus according to an example embodiment of the invention;
Fig. 5 shows a method according to an example embodiment of the invention;
Fig. 6 shows an apparatus according to an example embodiment of the invention;
Fig. 7 shows a method according to an example embodiment of the invention;
Fig. 8 shows an apparatus according to an example embodiment of the invention;
Fig. 9 shows a method according to an example embodiment of the invention;
Fig. 10 shows an apparatus according to an example embodiment of the invention;
Fig. 1 1 shows a method according to an example embodiment of the invention;
Fig. 12 shows an apparatus according to an example embodiment of the invention;
Fig. 13 shows a method according to an example embodiment of the invention; and
Fig. 14 shows an apparatus according to an example embodiment of the invention.
Detailed description of certain example embodiments
Herein below, certain example embodiments of the present invention are described in detail with reference to the accompanying drawings, wherein the features of the example embodiments can be freely combined with each other unless otherwise described. However, it is to be expressly understood that the description of certain example embodiments is given by way of example only, and that it is by no way intended to be understood as limiting the invention to the disclosed details.
Moreover, it is to be understood that the apparatus is configured to perform the corresponding method, although in some cases only the apparatus or only the method are described.
If information on the number of BWPs and their sizes is exchanged across gNBs it will be beneficial at the serving gNB to decide on the right candidate gNB for handover of a UE. Some example embodiments of the invention provide enhancements to the Xn interface between NR nodes (gNBs) to support co-ordination of BWP configurations across the cells and enable better connected mode mobility performance for UE operating with different band-width parts dynamically at different positions within cell bandwidth.
In view of the latest Xn specification, there are at least the following two problems:
Problem 1 :
Whether a NR cell supports operation for specific BWP or not and also, the number of BWP for each BWP supported in the current cell are not known to the neighbour-cells. These pieces of information may be relevant the serving cell to decide on selecting a suitable target cell capable of supporting the ongoing traffic of UE in the serving cells and also the BWP supported by UE. The BWP(s) are configured in a dedicated manner to the UE, but an indication of the BWP that will be used and also the purpose of this BWP is useful for the serving cell (source gNB) when triggering an HO to the target cell.
Problem 2:
As per existing specifications, the connected mode mobility between NR cells may be based on measurements over the Sync-Signal-block (SSB) within the cell bandwidth. The definition of SSB is: SS/PBCH block: Synchronization Signals / PBCH block. For NR neighbour-cell measurements, each measurement object is configured with SSB frequency and its timing information so that UE can check for the SSB on the specific frequency on the corresponding measurement time window. When the SSB transmissions of neighbour-cells change dynamically to support the measurements within active BWP, the corresponding changes also should be communicated to UE, e.g. via RRC signalling. In case of EN-DC dual connectivity, this information is sent to LTE node (eNB) so that LTE node can provide this information via LTE RRC signalling to UE. For dynamically changing SSB locations, this mechanism is not efficient. The signalling according to current NR specifications does not allow signalling different PCIs for the SSBs, and it doesn’t give information about the BWP that will be associated with the SSB.
Some example embodiments of the invention provide a solution to at least one of these problems.
According to some example embodiments of the invention, a number of BWP possible within the cell bandwidth for different bandwidths are exchanged between NR nodes (gNBs) along with additional information about the services corresponding to each of the bandwidth part.
For example, a cell with a maximum bandwidth of 50 MHz may indicate the BWP parts it supports within these 50 MHz to neighbour cells, such as 5 MHz, 10 MHz ,20 MHz and 40 MHz and the service type information corresponding to each of these BWPs such as of eMBB, URLLC or tactile etc... The selection of gNB may happen based on the service type in some cases. For each of the bandwidth parts, the respective possible location of the bandwidth start may also be provided. The neighbour gNB may use this information about the cell when configuring the measurement report in the UE, and also while deciding the target-cell for connected mode handover.
According to some example embodiments of the invention, the following changes to current specifications are foreseen to implement a method to exchange possible BWP configurations of neighbour cell with serving cell.
• New Information element “BWP-Pre-configuration-lnformation” included in each serving cell information of X2-SETUP-REQ/RES and also X2-NG-RAN-NODE- CONFIGURATION-UPDATE/ACK message.
• This new information element consists of
o BWP frequency locations possible for each bandwidth size supported by the NR cell.
o For each of the BWP location, the services (service type) and/or information on a QoS parameter (such as expected throughput, latency, and/or jitter) are also included.
A message sequence for XN-SETUP procedure modified with aspects according to some example embodiments of the invention is given in Fig. 1. According to Fig. 1 , gNB1 requests setup of Xn interface to gNB2 by XN-SETUP-REQ (S15). In the setup request, gNB1 provides information on the supported smaller BWPs (i.e., the potential sizes thereof), and for each of the sizes of the smaller BWPs, it provides potential BWP locations, information on the supported service type (e.g. best effort, real time, URLLC, etc.), and the expected throughput (or other QoS parameters, like delay, jitter, etc.). In addition, it may provide for each of the smaller BWPs an indication whether or not it supports CA, and/or of the network slices that are supported.
Furthermore, the setup request message may comprise an MTC container indicating whether or not a certain SSB is static (i.e. permanently transmitted) or not (i.e. semi-static or dynamic). For each of the SSBs, it may additionally comprise a PCI.
In response to XN-SETUP-REQ, gNB2 provides in XN-SETUP-RES corresponding parameters for its cell to gNB1 (S16).
In some example embodiments, corresponding information may be exchanged between gNB1 and gNB2 when the Xn interface between them is updated. In some example embodiments, the gNBs may exchange corresponding information by dedicated messages, separately from setting up or updating the Xn interface.
When a UE in a serving cell (a cell of gNB1 or of gNB2) reports a measurement that leads the gNB to trigger a handover (in particular: a connected mode handover), the serving cell may take the information on the BWPs of the neighbour cell (a cell of the other one of gNB1 and gNB2) into account. This is shown in Fig. 2.
According to Fig. 2, gNB of serving cell receives a measurement report for the neighbor cell from UE (S25). The measurement report is related to a SSB. From the association of the SSB to the BWP and its supported service type and QoS parameter (e.g. expected throughput) received at setup (or update) of Xn interface, gNB obtains information on the BWP (size, location), service type, and QoS parameter (S26).
Based on this information, the serving cell may decide whether or not the terminal should handover to the neighbor cell (S27).
In some example embodiments, the serving cell, when deciding on the handover, may not take into account at least one of the location, size, and support for CA of the BWP. I.e., the serving cell decides the appropriate target cell based on only one or both of the service type and the QoS parameter. In such example embodiments, the gNBs need not to exchange information on the at least one of location, size, and support for CA of the BWP. I.e., in these example embodiments, among the information exchanged according to Fig. 1 , the gNBs may only exchange information on at least one of the service type and QoS parameter of the BWP and the SSB associated to the BWP.
Furthermore, in some example embodiments of the invention, the information exchanged between the gNBs at setup or update of the Xn interface (or in a dedicated message) need not to comprise the MTC container.
In the example embodiments outlined hereinabove, gNB1 provides the same parameters to gNB2 as the parameters that gNB2 provides to gNB1 at setup or update of the Xn interface (or in a dedicated message) (see e.g. Fig. 1 ). However, this is not mandatory. One gNB may provide a subset of the parameters it receives from the other gNB. The parameters provided from one gNB to the other gNB may be partly or fully disjoint from the parameters provided from the other gNB to the one gNB. In some example embodiments, one gNB does not provide any parameters to the other gNB while the other gNB provides the indications of the SSB and one or both of the associated service type and QoS parameter to the one gNB. The QoS parameter(s) provided by one gNB may be the same or different from the QoS parameter(s) provided by the other gNB.
Of course, each gNB may act only according to the parameters it receives from the its neighbor gNB. For example, if in some example embodiments of the invention gNB1 receives the indications of the SSB and one or both of the associated service type and QoS parameter from gNB2 but gNB1 does not provide these parameters to gNB2, gNB1 may perform selection of a target cell according to some example embodiments of the invention but gNB2 may not perform such selection of a target cell. In another example, if in some example embodiments of the invention gNB1 receives the indications of the SSB and the associated service type but not of the QoS parameter from gNB2 while gNB2 receives the indications of the SSB and the QoS parameter but not of the associated service type from gNB1 , gNB1 may select the target cell based on the service type but not based on the QoS parameter while gNB2 may select the target cell based on the QoS parameter but not based on the service type.
According to some example embodiments of the invention, the neighbour cell informs the serving cell for each SSB whether or not transmission of the respective SSB is activated, for example by a new Xn Message Xn-NG-NODE-DYNAMIC-SSB-CONFIG-UPDATE message. If the transmission of a SSB is activated, the SSB may be denoted as an “active SSB” hereinafter. In some of these example embodiments, the new Xn message provides a bitmap of active SSBs is provided. Alternatively or in addition to the bitmap, the Xn message may comprise a corresponding MTC configuration information.
When gNB of the serving cell configures the measurement control message for the UE, gNB of the serving cell refers to the latest bitmap (or MTC configuration) received from neighbor- cells such that it configures the UE to measure only active SSBs.
In some example embodiments of the invention, gNB monitors if the activation status of a SSB changes, e.g. by comparing the previously received bitmap with the currently received bitmap. If such a change is detected and a UE in connected mode is configured for measuring the respective SSB, gNB of the serving cell may provide update information to the UE instead of completely reconfiguring the measurement configuration. The update information may be provided to the UE as an additional MAC control element in the ongoing data transmission. Thus, additional RRC signaling for all connected UEs to update the measurement configuration is avoided.
With the above method, measurement configurations are optimised because the UE knows the active SSBs in the neighbour cell, which can be used for measurements. In case if BWP of neighbour-cell is active and is at same frequency as that of serving cell, SSB based measurements can be completed without using interfrequency measurement which is more difficult to achieve than intra-frequency measurement.
If the new Xn message (or a corresponding dedicated message between the gNBs) indicates a PCI for the SSB, gNB of the serving cell informs UE on the PCI for the SSB.
The Measurement Gaps can be configured only if the UE reports no cells on SSB on the active BWP. If UE does not find any SSB of neighboring cell to measure in the frequency of the active BWP, then interfrequency measurement needs to be configured, using Measurement Gap.
In the above example embodiments, all SSBs are treated in a same way. However, in some example embodiments of the invention, the activation of one or more SSBs may be static, i.e., the transmission of these SSB(s) is always activated. In these example embodiments, the Xn message exchanged at setup or update of the Xn interface (or a corresponding dedicated message) may indicate whether or not the activation of the SSB is static (see the MTC container in Fig. 1 ). In such example embodiments, the bitmap transferred from gNB of the neighbour cell to gNB of the serving cell may not comprise a bit for one or more of the cells the activation of which is not static. Thus, signalling effort may be reduced.
According to some example embodiments of the invention, the following changes in 3GPP specifications are foreseen:
• The MTC information element (MTC container in Fig. 1 ) within Xn-SETUP-REQ /RES message includes for each SSB an additional parameter whether the activation of the SSB transmission is static or dynamic. In particular, the activation of the SSB transmission may be dynamic if the SSB is linked to a specific BWP.
o The MTC information element may additionally comprise for each SSB PCI information if a single CGI maps to multiple PCIs.
• A new Xn message to indicate the status of (at least) dynamic SSBs (SSBs with dynamic activation of their transmission) to other cells.
• RRC Measurement control message configuring NR-Measurement objects includes additional parameter for SSB indicating whether or not it is always active.
• For the SSB(s) with non-static activation (dynamic or semi-static), new MAC CE Information on SSB-Update which indicates the latest status of SSB. It may also comprise the modified PCI-list for the SSB.
• In order to figure out if there are or not SSB to report in given frequency, a new Measurement Event can be configured. This measurement event will be triggered if UE doesn’t find any SSB in a given frequency (except the SSB of the active BWP in case of intra frequency). If there is no SSB of neighbouring cell, the network will configure interfrequency measurement using Meaurement gap.
Fig. 3 shows a method according to an example embodiment of the invention. As shown in Fig. 3, gNB1 (of the neighbor cell) sends to gNB2 Xn-SSB-CONFIG-UPDATE message which comprises a bitmap indicating the active SSBs (S35). In addition, it may comprise information on PCI and CGI, in particular if one CGI is associated with plural PCIs. gNB1 may send this message each time when one of the pieces of information comprised in the message changes. In addition or alternatively, it may send the message periodically.
When gNB2 receives the Xn-SSB-CONFIG-UPDATE message, it may use it to reconfigure the measurement configurations in the UE (S36). In particular for UEs in connected mode which are already configured with a measurement configuration (received the measurement control information), gNB2 may inform the UE on the update by a new CE in a MAC PDU (S37, S38).
Fig. 4 shows an apparatus according to an example embodiment of the invention. The apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof. Fig. 5 shows a method according to an example embodiment of the invention. The apparatus according to Fig. 4 may perform the method of Fig. 5 but is not limited to this method. The method of Fig. 5 may be performed by the apparatus of Fig. 4 but is not limited to being performed by this apparatus.
The apparatus comprises means for obtaining 10 and means for providing 20. The means for obtaining 10 and means for providing 20 may be an obtaining means and providing means, respectively. The means for obtaining 10 and means for providing 20 may be an obtainer and a provider, respectively. The means for obtaining 10 and means for providing 20 may be an obtaining processor and providing processor, respectively.
The means for obtaining 10 obtains, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a QoS parameter (e.g. expected throughput, expected latency, and/or expected jitter) associated to the synchronization signal block (S10). The synchronization signal block may be associated to a bandwidth part.
The means for providing 20 provides an association to a serving cell (S20). The association indicates that the at least one of the service type and the QoS parameter is associated to the synchronization signal block. The serving cell may be different from the neighbor cell.
Fig. 6 shows an apparatus according to an example embodiment of the invention. The apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof. Fig. 7 shows a method according to an example embodiment of the invention. The apparatus according to Fig. 6 may perform the method of Fig. 7 but is not limited to this method. The method of Fig. 7 may be performed by the apparatus of Fig. 6 but is not limited to being performed by this apparatus.
The apparatus comprises means for monitoring 1 10, means for associating 120, and means for deciding 130. The means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitoring means, associating means, and deciding means, respectively. The means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitor, associator, and decider, respectively. The means for monitoring 1 10, means for associating 120, and means for deciding 130 may be a monitoring processor, associating processor, and deciding processor, respectively.
The means for monitoring 1 10 monitors if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell (S1 10). The serving cell may be different from the neighbor cell.
If the serving cell receives the measurement report (S1 10 =“yes”), the means for associating 120 associates at least one of a service type and a QoS parameter (e.g. expected throughput, expected latency, and/or expected jitter) to the synchronization signal block (S120). The association is made based on an association of the at least one of the service type and the QoS parameter to the synchronization signal block received from the neighbor cell.
The means for deciding 130 decides, based on the at least one of the service type and the QoS parameter, whether or not the terminal is to be handed over to the neighbor cell (S130).
Fig. 8 shows an apparatus according to an example embodiment of the invention. The apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof. Fig. 9 shows a method according to an example embodiment of the invention. The apparatus according to Fig. 8 may perform the method of Fig. 9 but is not limited to this method. The method of Fig. 9 may be performed by the apparatus of Fig. 8 but is not limited to being performed by this apparatus.
The apparatus comprises means for obtaining 210 and means for informing 220. The means for obtaining 210 and means for informing 220 may be an obtaining means and informing means, respectively. The means for obtaining 210 and means for informing 220 may be an obtainer and an informer, respectively. The means for obtaining 210 and means for informing 220 may be an obtaining processor and informing processor, respectively.
The means for obtaining 210 obtains an activation indication (S210). The activation indication indicates if a transmission of a synchronization signal block is activated in a neighbor cell. The means for informing 220 informs a serving cell on the activation indication (S220). The serving cell may be different from the neighbor cell. Fig. 10 shows an apparatus according to an example embodiment of the invention. The apparatus may be a control unit which may be implemented in base station (e.g. gNB) or an element thereof. Fig. 1 1 shows a method according to an example embodiment of the invention. The apparatus according to Fig. 10 may perform the method of Fig. 1 1 but is not limited to this method. The method of Fig. 1 1 may be performed by the apparatus of Fig. 10 but is not limited to being performed by this apparatus.
The apparatus comprises means for monitoring 310 and means for configuring 320. The means for monitoring 310 and means for configuring 320 may be a monitoring means and configuring means, respectively. The means for monitoring 310 and means for configuring 320 may be a monitor and a configurator, respectively. The means for monitoring 310 and means for configuring 320 may be a monitoring processor and configuring processor, respectively.
The means for monitoring 310 monitors if a serving cell receives an activation indication (S310). The activation indication indicates if a transmission of a synchronization signal block is activated in a neighbor cell. The serving cell may be different from the neighbor cell.
If the serving cell receives the activation indication (S310 =“yes”), the means for configuring 320 configures a measurement configuration of a terminal served by the serving cell based on the activation indication (S320).
Fig. 12 shows an apparatus according to an example embodiment of the invention. The apparatus may be a control unit which may be implemented in a terminal (e.g. UE) or an element thereof. Fig. 13 shows a method according to an example embodiment of the invention. The apparatus according to Fig. 12 may perform the method of Fig. 13 but is not limited to this method. The method of Fig. 13 may be performed by the apparatus of Fig. 12 but is not limited to being performed by this apparatus.
The apparatus comprises means for monitoring 410 and means for configuring 420. The means for monitoring 410 and means for configuring 420 may be a monitoring means and configuring means, respectively. The means for monitoring 410 and means for configuring 420 may be a monitor and a configurator respectively. The means for monitoring 410 and means for configuring 420 may be a monitoring processor and configuring processor, respectively.
The means for monitoring 410 monitors if a control information on a measurement configuration is received in a medium access control packet data unit (S410). If the control information is received in the MAC PDU (S410 = “yes”), the means for configuring 420 configures the measurement configuration based on the control information (S420). In particular, the means for configuring may update the measurement configuration based on the control information.
Fig. 14 shows an apparatus according to an example embodiment of the invention. The apparatus comprises at least one processor 810, at least one memory 820 including computer program code, and the at least one processor 810, with the at least one memory 820 and the computer program code, being arranged to cause the apparatus to at least perform at least one of the methods according to Figs. 5, 7, 9, 1 1 , and 13.
Some example embodiments of the invention are described which are based on a 3GPP network (e.g. E-UTRAN or NR) of any generation (3G, 4G, 5G, etc.). However, the invention is not limited to 3GPP networks. It may be applied to other radio networks with bandwidth parts and/or dynamic SSB.
A UE is an example of a terminal. However, the terminal (UE) may be any device capable to connect to the radio network such as a MTC device, a D2X device etc.
A cell may be represented by the base station serving the cell. The base station (cell) may be connected to an antenna (array) serving the cell by a Remote Radio Head. Some example embodiments of the invention may be deployed in the Remote Radio Head. A base station may be realized as a combination of a central unit (one for plural base stations) and a distributed unit (one per base station). The central unit may be employed in the cloud.
One piece of information may be transmitted in one or plural messages from one entity to another entity. Each of these messages may comprise further (different) pieces of information.
Names of network elements, protocols, and methods are based on current standards. In other versions or other technologies, the names of these network elements and/or protocols and/or methods may be different, as long as they provide a corresponding functionality.
If not otherwise stated or otherwise made clear from the context, the statement that two entities are different means that they perform different functions. It does not necessarily mean that they are based on different hardware. That is, each of the entities described in the present description may be based on a different hardware, or some or all of the entities may be based on the same hardware. It does not necessarily mean that they are based on different software. That is, each of the entities described in the present description may be based on different software, or some or all of the entities may be based on the same software. Each of the entities described in the present description may be embodied in the cloud.
According to the above description, it should thus be apparent that example embodiments of the present invention provide, for example, a base station (e.g. a gNB or eNB,) or a cell thereof, or a component thereof, an apparatus embodying the same, a method for controlling and/or operating the same, and computer program(s) controlling and/or operating the same as well as mediums carrying such computer program(s) and forming computer program product(s).
Implementations of any of the above described blocks, apparatuses, systems, techniques or methods include, as non-limiting examples, implementations as hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
It is to be understood that what is described above is what is presently considered the preferred example embodiments of the present invention. However, it should be noted that the description of the preferred example embodiments is given by way of example only and that various modifications may be made without departing from the scope of the invention as defined by the appended claims.

Claims

Claims:
1. Apparatus, comprising
means for obtaining configured to obtain, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block;
means for providing configured to provide an association to a serving cell, wherein the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
2. The apparatus according to claim 1 , wherein
the synchronization signal block is associated to a bandwidth part;
the means for obtaining is configured to obtain at least one of a size of the bandwidth part, a location of the bandwidth part, and a support information of the bandwidth part;
the association comprises the at least one of the size, the location, and the support information,
the association indicates that the at least one of the size, the location, and the support information is associated to the synchronization signal block.
3. The apparatus according to claim 2, wherein,
the support information informs whether or not carrier aggregation is supported on the bandwidth part.
4. The apparatus according to any of claims 1 to 3, wherein
the means for providing is configured to provide the association in a message transmitted when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
5. Apparatus, comprising
means for monitoring configured to monitor if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell;
means for associating configured to associate, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell; means for deciding configured to decide based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
6. The apparatus according to claim 5, wherein
the association additionally associates the synchronization signal block to at least one of a size of a bandwidth part, a location of the bandwidth part, and a support information of the bandwidth part;
the means for associating is additionally configured to associate the synchronization signal block to the at least one of the size, the location, and the support information;
the means for deciding is configured to decide whether or not the terminal is to be handed over to the neighbor cell additionally based on the at least one of the location, the size, and the support information.
7. The apparatus according to claim 6, wherein,
the support information informs whether or not carrier aggregation is supported on the bandwidth part.
8. The apparatus according to any of claims 5 to 7, further comprising
means for extracting configured to extract the association from a message received when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
9. Apparatus, comprising
means for obtaining configured to obtain an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell;
means for informing configured to inform a serving cell on the activation indication.
10. The apparatus according to claim 9, wherein
the means for obtaining is further configured to obtain a physical cell identity related to the synchronization signal block; and
the means for informing is configured to inform the serving cell on the physical cell identity.
1 1 . The apparatus according to any of claims 9 and 10, further comprising means for checking configured to check if the activation of the synchronization signal block is static;
means for inhibiting configured to inhibit at least one of the obtaining means from obtaining the activation indication and the means for informing from informing on the activation information if the synchronization signal block is static;
means for announcing configured to announce to the serving cell that the activation of the synchronization signal block is static if the activation of the synchronization signal block is static.
12. The apparatus according to claim 1 1 , wherein
the means for announcing is configured to announce that the activation of the synchronization signal block is static in a message transmitted when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
13. Apparatus, comprising
means for monitoring configured to monitor if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell;
means for configuring configured to configure a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
14. The apparatus according to claim 13, wherein
the means for monitoring is further configured to monitor if the serving cell receives a physical cell identity related to the synchronization signal block; and
the means for configuring is configured to configure the measurement configuration based on the physical cell identity.
15. The apparatus according to any of claims 13 and 14, further comprising
means for detecting configured to detect if the activation indication has changed; wherein
the means for configuring is configured to configure the measurement configuration by informing the terminal on the change of the activation indication.
16. The apparatus according to any of claims 13 to 15, further comprising means for deciding configured to decide if the terminal is in a connected mode; wherein the means for configuring is configured to configure the measurement configuration by providing a control element in a medium access control packet data unit to the terminal if the terminal is in the connected mode.
17. The apparatus according to any of claims 13 to 16, further comprising
means for checking configured to check if the serving cell receives an announcement that the activation of the synchronization signal block is static;
means for inhibiting configured to inhibit the means for monitoring from monitoring if the serving cell receives the announcement that the activation of the synchronization signal block is static.
18. The apparatus according to claim 17, further comprising
means for extracting configured to extract the announcement from a message received when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
19. Apparatus, comprising
means for monitoring configured to monitor if a control information on a measurement configuration is received in a medium access control packet data unit;
means for configuring configured to configure the measurement configuration based on the control information if the control information is received.
20. The apparatus according to claim 19, wherein
the control information comprises an update information; and
the means for configuring is configured to configure the measurement configuration by updating a current measurement configuration based on the update information.
21. Method, comprising
obtaining, from a neighbor cell, an indication of a synchronization signal block and at least one of a service type and a quality of service parameter associated to the synchronization signal block;
providing an association to a serving cell, wherein
the association indicates that the at least one of the service type and the quality of service parameter is associated to the synchronization signal block.
22. The method according to claim 21 , wherein
the synchronization signal block is associated to a bandwidth part;
the obtaining comprises obtaining at least one of a size of the bandwidth part, a location of the bandwidth part, and a support information of the bandwidth part;
the association comprises the at least one of the size, the location, and the support information,
the association indicates that the at least one of the size, the location, and the support information is associated to the synchronization signal block.
23. The method according to claim 22, wherein,
the support information informs whether or not carrier aggregation is supported on the bandwidth part.
24. The method according to any of claims 21 to 23, wherein
the providing comprises providing the association in a message transmitted when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
25. Method, comprising
monitoring if a serving cell receives from a terminal a measurement report on a synchronization signal block of a neighbor cell;
associating, if the serving cell receives the measurement report, at least one of a service type and a quality of service parameter to the synchronization signal block based on an association of the at least one of the service type and the quality of service parameter to the synchronization signal block received from the neighbor cell;
deciding based on the at least one of the service type and the quality of service parameter whether or not the terminal is to be handed over to the neighbor cell.
26. The method according to claim 25, wherein
the association additionally associates the synchronization signal block to at least one of a size of a bandwidth part, a location of the bandwidth part, and a support information of the bandwidth part;
the associating additionally comprises associating the synchronization signal block to the at least one of the size, the location, and the support information; the deciding comprises deciding whether or not the terminal is to be handed over to the neighbor cell additionally based on the at least one of the location, the size, and the support information.
27. The method according to claim 26, wherein,
the support information informs whether or not carrier aggregation is supported on the bandwidth part.
28. The method according to any of claims 25 to 27, further comprising
extracting the association from a message received when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
29. Method, comprising
obtaining an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell;
informing a serving cell on the activation indication.
30. The method according to claim 29, wherein
the obtaining further comprises obtaining a physical cell identity related to the synchronization signal block; and
the informing comprises informing the serving cell on the physical cell identity.
31. The method according to any of claims 29 and 30, further comprising
checking if the activation of the synchronization signal block is static;
inhibiting at least one of obtaining the activation indication and informing on the activation information if the synchronization signal block is static;
announcing to the serving cell that the activation of the synchronization signal block is static if the activation of the synchronization signal block is static.
32. The method according to claim 31 , wherein
the announcing comprises announcing that the activation of the synchronization signal block is static in a message transmitted when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
33. Method, comprising monitoring if a serving cell receives an activation indication indicating if a transmission of a synchronization signal block is activated in a neighbor cell;
configuring a measurement configuration of a terminal served by the serving cell based on the activation indication if the serving cell receives the activation indication.
34. The method according to claim 33, wherein
the monitoring further comprises monitoring if the serving cell receives a physical cell identity related to the synchronization signal block; and
the configuring comprises configuring the measurement configuration based on the physical cell identity.
35. The method according to any of claims 33 and 34, further comprising
detecting if the activation indication has changed; wherein
the configuring comprises configuring the measurement configuration by informing the terminal on the change of the activation indication.
36. The method according to any of claims 33 to 35, further comprising
deciding if the terminal is in a connected mode; wherein
the configuring comprises configuring the measurement configuration by providing a control element in a medium access control packet data unit to the terminal if the terminal is in the connected mode.
37. The method according to any of claims 33 to 36, further comprising
checking if the serving cell receives an announcement that the activation of the synchronization signal block is static;
inhibiting the monitoring if the serving cell receives the announcement that the activation of the synchronization signal block is static.
38. The method according to claim 37, further comprising
extracting the announcement from a message received when setting up or modifying an interface between a serving base station of the serving cell and a neighbor base station of the neighbor cell.
39. Method, comprising
monitoring if a control information on a measurement configuration is received in a medium access control packet data unit; configuring the measurement configuration based on the control information if the control information is received.
40. The method according to claim 39, wherein
the control information comprises an update information; and
the configuring comprises configuring the measurement configuration by updating a current measurement configuration based on the update information.
41. A computer program product comprising a set of instructions which, when executed on an apparatus, is configured to cause the apparatus to carry out the method according to any of claims 21 to 40.
42. The computer program product according to claim 41 , embodied as a computer-readable medium or directly loadable into a computer.
PCT/EP2019/072446 2018-09-24 2019-08-22 Bwp information coordination WO2020064229A1 (en)

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