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WO2024209057A1 - Adaptations de domaine spatial et de puissance pour des économies d'énergie de réseau - Google Patents

Adaptations de domaine spatial et de puissance pour des économies d'énergie de réseau Download PDF

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Publication number
WO2024209057A1
WO2024209057A1 PCT/EP2024/059339 EP2024059339W WO2024209057A1 WO 2024209057 A1 WO2024209057 A1 WO 2024209057A1 EP 2024059339 W EP2024059339 W EP 2024059339W WO 2024209057 A1 WO2024209057 A1 WO 2024209057A1
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Prior art keywords
csi
mac
network node
subconfiguration
subconfigurations
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English (en)
Inventor
Ali Nader
Stephen Grant
Ajit Nimbalker
Ravikiran Nory
Sina MALEKI
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas

Definitions

  • the present disclosure relates to wireless communications, and in particular, to spatial and/or power domain adaptations for network energy savings.
  • the Third Generation Partnership Project (3GPP) has developed and is developing standards for Fourth Generation (4G) (also referred to as Long Term Evolution (LTE)) and Fifth Generation (5G) (also referred to as New Radio (NR)) wireless communication systems.
  • 4G Fourth Generation
  • 5G Fifth Generation
  • Such systems provide, among other features, broadband communication between network nodes, such as base stations, and mobile wireless devices (WDs) or user equipments (UEs), as well as communication between network nodes and between WDs.
  • the 3 GPP is also developing standards for Sixth Generation (6G) wireless communication networks.
  • the network (network node) power consumption for NR is said to be lower than as for LTE because of its lean design. In the current implementation, however, NR will most likely consume more power compared to LTE, e.g., due to the higher bandwidth and more so due to introduction of additional elements such as 64 transmi t/receive (TX/RX) ports with associated digital radio frequency (RF) chains.
  • TX/RX transmi t/receive
  • RF digital radio frequency
  • the network node may need to use full configuration even when the maximum network node support is actually rarely needed by the UEs.
  • an increased number of TX/RX ports also leads to an increase in the number of reference signals (e.g., CSI-RS) needed to be transmitted by the network node (and to be measured by the UE) for proper signal detection.
  • the additional TX/RX ports may result in additional power consumption, i.e., to transmit a larger number of CSI-RS to the UEs.
  • the larger number of CSI- RS transmissions may also consume the valuable network node resources.
  • an NR network node may deploy large antenna arrays with hundreds of antenna elements and often up to 32 digital ports (or more).
  • the energy cost associated with RF (power amplifier (PA) and low noise amplifier (LNA)), digital processing, and baseband processing associated with such an array is high.
  • Each sub-array is typically connected to two transceiver chains, one per polarization, as shown in the example of FIG. 2.
  • each transceiver chain corresponds to a digital antenna port.
  • An antenna port is what is “seen” by the baseband (Open Systems Interconnection Layer 1 (LI) processing) in the sense that digital beamforming weights may be applied at baseband across the multiple ports to steer a beam toward a scheduled user.
  • LI Open Systems Interconnection Layer 1
  • maintaining sufficient user and system performance may not require a full antenna array at the network node.
  • the network node may then deactivate or mute parts of the antenna panel and transmit with a subset of antenna elements to reduce energy consumption, as shown in the example of FIG. 3.
  • Type 1 all antenna elements associated to a logical antenna port is disabled/enabled
  • Type 2 part/subset of antenna elements associated to a logical antenna port is disabled/enabled.
  • FIGS. 1 and 2 there are 64 digital antenna ports with 2 ports per sub-array corresponding to the two polarizations.
  • Type-1 antenna muting is when all antenna elements corresponding to a port are disabled. Since there are two elements per port, both of them would be muted.
  • Type-2 antenna muting is more relevant to millimeter wave (mmWave) applications in frequency range 2 when there are a small number of ports (e.g., 2), but many antenna elements associated per port. In this case, there is typically a power amplifier (PA) associated with each antenna element, so energy may be saved by muting antenna elements within a port.
  • PA power amplifier
  • the UE estimates CSI based on CSI reference signal (CSI-RS) resources with a certain number of ports, where the number of ports is consistent with the deployed antenna array.
  • CSI-RS CSI reference signal
  • a CSI-RS resource used for CSI reporting may span 1, 2, or 4 orthogonal frequency division multiplexed (OFDM) symbols:
  • a CSI-RS resource may start at any symbol (0-13) within a slot:
  • components may be mapped to frequencies with granularity of component size, 1, 2, or 4 subcarriers.
  • the same subcarriers may be used across all symbols in a resource.
  • CSI-RS resources are generally configured in sets, where a set may contain one or more CSI-RS resources. Typically, when CSI is requested, a CSI-RS resource set is indicated to the UE, and the UE will perform CSI measurements on the resources within the set.
  • a non-zero power CSI-RS resource is configured with a number of parameters within the IE, NZP-CSI-RS-Resource, as follows:
  • NZP-CSI-RS-Resource SEQUENCE ⁇ nzp-CSI-RS-Resourceld NZP-CSI-RS-Resourceld, resourceMapping CSI-RS-ResourceMapping, powerControlOffset INTEGER (-8 .15), powerControlOffsetSS ENUMERATED ⁇ db-3, dbO, db3, db6 ⁇ OPTIONAL, - Need R scramblingID Scrambling! d, periodicityAndOffset CSI-ResourcePeriodicityAndOffset OPTIONAL, - Cond
  • the highlighted parameters inform the UE of two different power offsets.
  • the first one, powerControlOffset is the power offset (in dB) between the physical downlink shared channel (PDSCH) and CSI-RS that the UE shall assume when it estimates and reports CSI for future PDSCH scheduling decisions made by the network node. Since the PDSCH and CSI-RS powers are generally different, and the UE estimates the channel based on CSI-RS samples, it uses this offset to correctly scale its CSI estimates appropriately to account for the power difference.
  • the second offset powerControlOffsetSS is the power offset (in dB) between CSI- RS and synchronization signal block (SSB). The UE may use this offset to compute the absolute power of the CSI-RS since the transmission power of the SSB is signaled to the UE separately.
  • Aperiodic CSI-RS Transmission This is a one-shot CSI-RS transmission that may be triggered by a network node via downlink control information (DCI) in any slot.
  • DCI downlink control information
  • one-shot means that CSI-RS transmission only happens once per trigger in one slot.
  • the CSI-RS resources i.e. , the resource element locations which consist of subcarrier locations and OFDM symbol locations
  • the transmission of aperiodic CSI-RS is triggered via downlink control information (DCI).
  • DCI downlink control information
  • Table 1 aperiodic CSI-RS may be used for aperiodic CSI reporting.
  • Periodic CSI-RS Transmission These CSI-RS transmissions are preconfigured by higher layer signaling and the pre-configuration includes parameters such as periodicity and slot offset. Periodic CSI-RS is controlled by higher layer signaling, only. That is, the periodic CSI-RS transmission starts following radio resource control (RRC) configuration following the configured parameters. As shown in Table 1, periodic CSI-RS may be used for periodic CSI reporting, semi-persistent CSI reporting and aperiodic CSI reporting.
  • RRC radio resource control
  • Semi-Persistent CSI-RS Transmission Similar to periodic CSI-RS, resources for semi-persistent CSI-RS transmissions are preconfigured via higher layer signaling with parameters such as periodicity and slot offset. However, unlike periodic CSI-RS, a dynamic allocation activation signaling via a medium access control (MAC) control element (CE) is needed to begin transmission of semi-persistent CSI-RS on the preconfigured resources. Furthermore, semi-persistent CSI-RS is transmitted for a limited time duration until the activated semi-persistent CSI-RS is deactivated via a deactivation signaling via a MAC CE. As shown in Table 1, semi-persistent CSI-RS may be used for semi-persistent CSI reporting and aperiodic CSI reporting. Configurations
  • the network node may wish to request the UE to report CSI based on one or more hypotheses of an antenna muting pattern and/or physical downlink shared channel (PDSCH)-to-CSI-RS power offset. Based on the CSI report(s), the network may identify if it may still serve the UE sufficiently well, while at the same time reducing network node energy cost by muting certain antennas and/or reducing PDSCH transmission power. It is beneficial to be able to request such CSI reports from the UE in an aperiodic fashion when needed. In current specifications, aperiodic CSI reporting is triggered by the “CSI request” field in DCI 0 1 and/or DCI 0 2:
  • a UE in connected mode is configured with a first number of trigger states (e.g., 128) via RRC signaling.
  • the DCI field size for A-CSI trigger state indication is limited to 6 bits, implying only a maximum of 64 trigger states may be active at a time and only these may be triggered via the DCI (e.g., via DCI 0_l/0_2).
  • a MAC CE may be used for Aperiodic CSI trigger state selection to indicate the active trigger states.
  • the active trigger state budget is limited, and the trigger states are used for many purposes such as CSI measurement and reporting for link adaptation, beam management (including Ll-RSRP reporting, LI signal to interference plus noise (SINR) reporting, etc.). An example is shown in FIG. 5.
  • IE information element
  • CSI- AperiodicTriggerStateList configures the UE with a list of trigger states. If the number of configured trigger states is more than what is possible to indicate to the UE using DCI, a MAC CE is used to down select from the RRC configured list.
  • Each trigger state includes a list of CSI-AssociatedReportConflglnfo and each includes an association between (1) a resource configuration (CSI-ResourceConflg') in which channel and interference resources to be measured are defined, and (2) a reporting configuration (CSI-ReportConflg) which configures the UE as to how and what to report based on the measurements.
  • CSI-ResourceConflg' resource configuration
  • CSI-ReportConflg reporting configuration
  • the CSI-AperiodicTriggerStateList information element is used to configure the UE with a list of aperiodic trigger states.
  • Each codepoint of the DCI field "CSI request" is associated with one trigger state (see 3GPP TS 38.321 [3], clause 6.1.3.13).
  • the UE Upon reception of the value associated with a trigger state, the UE will perform measurement of CSI-RS, CSI-IM and/or synchronization signal block (SSB) (reference signals) and aperiodic reporting on LI according to all entries in the associatedReportConflglnfoList for that trigger state.
  • SSB synchronization signal block
  • CSI-AperiodicTriggerState SEQUENCE ⁇ associatedReportConflglnfoList SEQUENCE (SIZE(L.maxNrofReportConfigPerAperiodicTrigger)) OF CSI- AssociatedReportConfiglnfo,
  • CSI-AssociatedReportConfiglnfo SEQUENCE ⁇ reportConfigld CSI-ReportConfigld, resourcesF orChannel CHOICE ⁇ nzp-CSI-RS SEQUENCE ⁇ resourceSet INTEGER (L.maxNrofNZP-CSI-RS-
  • FIG. 6 shows a first example of CSI reporting and resource configuration used for the case of aperiodic reporting on the physical uplink shared channel (PUSCH) which is triggered as described above.
  • PUSCH physical uplink shared channel
  • a trigger state includes an index that points to one CSI-RS resource set from a list CSI-RS resource sets configured in a CSI-ResourceConfig:
  • the trigger states point to the following CSI- RS resource sets:
  • a trigger state is “linked” to one or more CSI-ReportConfigs. Linking to multiple CSI-ReportConfigs is used in case it is desired to request the UE to report different types of CSI measurements:
  • Trigger State 1 is linked to two different CSI-ReportConfigs such that the UE reports two CSI measurements.
  • Trigger States 1 and S are linked to only one CSI-ReportConfig and thus reports only a single CSI measurement;
  • a CSI-ReportConfig includes a collection of CSI reporting parameters, e.g., CSI reporting type, codebook configuration, reporting granularity (wideband/subband), measurement restriction, etc.; o A CSI-ReportConfig is “linked” to a CSI-ResourceConfig which includes one or more lists of resources used for CSI measurement for this report configuration:
  • both CSI-ReportConfig 1 and 2 are both linked to CSI-ResourceConfig 1 and CSI-ReportConfig M is linked to CSI- ReportConfig N;
  • a CSI-ResourceConfig includes one or more lists including pointers to CSI-RS, SSB, and/or IM resource sets that the UE shall use for CSI measurement: o
  • CSI-ResourceConfig includes one or more lists including pointers to CSI-RS, SSB, and/or IM resource sets that the UE shall use for CSI measurement: o
  • FIG. 7 shows a second, simpler example of CSI reporting and resource configuration used for the case of aperiodic reporting on PUS CH.
  • the UE when the network node triggers a CSI report with a certain codepoint in the CSI Request field of DCI, the UE knows by configuration what kind of report(s) is/are requested, and on what measurement resources the report(s) should be based.
  • One CSI report configuration includes multiple CSI report sub-configurations where each sub-configuration corresponds to one spatial adaptation pattern:
  • CSI reporting based on multiple power offsets to enable the network node to request the UE to perform CSI measurement and reporting on PUSCH based on multiple hypothesized values of the PDSCH-to-CSI-RS power offset parameter powerControlOffset is described. This enables the network node to make energy saving decisions based on several hypotheses on PDSCH power reduction taking into account the channel quality reported by the UE.
  • Some embodiments advantageously provide methods, network nodes and UEs for spatial and/or power domain adaptations for network energy savings.
  • a UE which is pre-configured with one or more CSI-RS spatial domain and/or one or more power domain adaptation settings are disclosed.
  • the settings may be configured as sub-configurations of any of RRC configured Trigger States, Report Config, or CSI-RS resource setting. Once the network node adopts any of these subconfigurations, the UEs may be notified through MAC-CE and RRC signaling.
  • the UE is configured with one of:
  • One or more sub-configurations configured within a CSI reporting configuration (e.g., within the information element CSI-ReportConfig) where a subconfiguration includes a particular combination of spatial and/or power domain adaptation parameter settings;
  • One or more sub-configuration indicators configured within an aperiodic trigger state (e.g., within the information element CSI-AperiodicTriggerStateList) that each point to a sub-configuration within a CSI reporting configuration; and/or
  • One or more CSI resource configurations (e.g., the information element CSI-ResourceConfig) associated with the CSI reporting configuration which includes one or more CSI-RS resource sets on which the UE, when triggered, measures CSI based on the spatial and/or power domain adaptation parameter settings in a sub-configuration.
  • Each CSI-RS resource set includes one or more CSI-RS resources or indicators (ID) of one or more CSI-RS resources.
  • the UE may be indicated by MAC-CE and RRC signaling which of the subconfigurations are adopted by the network node and should be assumed for further reception in downlink.
  • a method in a user equipment, UE, configured to communicate with a network node includes receiving, via radio resource control, RRC, signaling, a channel state information, CSI, reporting configuration having at least one subconfiguration, each of the at least one subconfiguration including a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the method also includes receiving a medium access control, MAC, control element, CE, indicating activation of at least one of the at least one subconfiguration.
  • the method includes reporting CSI according to at least one of the at least one indicated subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, and each of the plurality of subconfigurations includes a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates to the UE deactivation of at least one of the plurality of subconfigurations.
  • the MAC CE indicates to the UE which of the at least one subconfiguration is to be activated.
  • the MAC CE indicates to the UE which of the at least one subconfiguration is to be deactivated.
  • a single MAC CE activates or deactivates the at least one subconfiguration. In some embodiments, activation or deactivation of each subconfiguration of the at least one subconfiguration is indicated by a bitmap of bits in the MAC CE.
  • a user equipment configured to communicate with a network node.
  • the UE is configured to receive, via radio resource control, RRC, signaling, a channel state information, CSI, reporting configuration having at least one subconfiguration, each of the at least one subconfiguration including a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the UE is also configured to receive a medium access control, MAC, control element, CE, indicating activation of at least one of the at least one subconfiguration.
  • the user equipment is configured to report CSI according to at least one of the at least one indicated subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, and each of the plurality of subconfigurations includes a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates to the UE deactivation of at least one of the plurality of subconfigurations.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be activated.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be deactivated.
  • a single MAC CE activates or deactivates the plurality of subconfigurations. In some embodiments, activation or deactivation of each subconfiguration of the plurality of subconfigurations is indicated by a bitmap of bits in the MAC CE.
  • a method in a network node configured to communicate with a user equipment, UE includes configuring the UE via radio resource control, RRC, signaling with a channel state information, CSI, reporting configuration having at least one subconfiguration, each subconfiguration including a spatial adaption parameter setting and/or a power adaptation parameter setting.
  • the method includes indicating to the UE, via a medium access control, MAC, control element, CE, activation of at least one of the at least one subconfiguration.
  • the method includes receiving a CSI report, from the UE, according to at least one of the indicated at least one subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, each of the plurality of subconfigurations including a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates to the UE deactivation of at least one of the plurality of subconfigurations.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be activated.
  • the MAC CE indicates to the UE which of the plurality of subconfiguration is to be deactivated.
  • a single MAC CE activates or deactivates the plurality of subconfigurations. In some embodiments, activation or deactivation of each subconfiguration of the plurality of subconfigurations is indicated by a bitmap of bits in the MAC CE.
  • a network node configured to communicate with a user equipment, UE.
  • the network node is configured to configure the UE via radio resource control, RRC, signaling with a channel state information, CSI, reporting configuration having at least one subconfiguration, each subconfiguration including a spatial adaption parameter setting and/or a power adaptation parameter setting.
  • the network node is configured to indicate to the UE, via a medium access control, MAC, control element, CE, activation of at least one of the at least one subconfiguration.
  • the network node is configured to receive a CSI report, from the UE, according to at least one of the indicated at least one subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, each of the plurality of subconfigurations including a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates deactivation of at least one of the plurality of subconfigurations. In some embodiments, the MAC CE indicates to the UE which of the plurality of subconfigurations is to be activated. In some embodiments, the MAC CE indicates to the UE which of the plurality of subconfiguration is to be deactivated.
  • a single MAC CE activates or deactivates the plurality of subconfigurations. In some embodiments, activation or deactivation of each subconfiguration of the plurality of subconfigurations is indicated by a bitmap of bits in the MAC CE.
  • FIG. 1 is an example antenna arrangement
  • FIG. 2 is an example of polarizations connected to separate RX/TC chains
  • FIG. 3 illustrates different transceiver muting patterns
  • FIG. 4 shows example mappings of CSI-RS to physical resources
  • FIG. 5 illustrates trigger states for aperiodic CSI reporting
  • FIG. 6 is an example of an A-CSI reporting configuration
  • FIG. 7 is another example of an A-CSI reporting configuration
  • FIG. 8 is a schematic diagram of an example network architecture illustrating a communication system connected via an intermediate network to a host computer according to the principles in the present disclosure
  • FIG. 9 is a block diagram of a host computer communicating via a network node with a wireless device over an at least partially wireless connection according to some embodiments of the present disclosure
  • FIG. 10 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for executing a client application at a wireless device according to some embodiments of the present disclosure
  • FIG. 11 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a wireless device according to some embodiments of the present disclosure
  • FIG. 12 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data from the wireless device at a host computer according to some embodiments of the present disclosure
  • FIG. 13 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a host computer according to some embodiments of the present disclosure
  • FIG. 14 is a flowchart of an example process in a network node for spatial and power domain adaptations for network energy savings
  • FIG. 15 is a flowchart of an example process in a wireless device for spatial and power domain adaptations for network energy savings
  • FIG. 16 is a flowchart of an example process in a network node for spatial and power domain adaptations for network energy savings
  • FIG. 17 is a flowchart of an example process in a wireless device for spatial and power domain adaptations for network energy savings
  • FIG. 18 is a first example of a CSI reporting configuration according to methods disclosed herein;
  • FIG. 19 is a first example of a MAC CE when only one hypothesis is configured per trigger state
  • FIG. 20 is a second example of a MAC CE when only one hypothesis is configured per trigger state
  • FIG. 21 is a second example of a CSI reporting configuration according to methods disclosed herein;
  • FIG. 22 is an first example of a MAC CE when hypotheses are configured per CSI- RS resource set
  • FIG. 23 is a third example of a CSI reporting configuration according to methods disclosed herein;
  • FIG. 24 is a second example of a MAC CE when hypotheses are configured per CSI-RS resource set
  • FIG. 25 is a fourth example of a CSI reporting configuration according to methods disclosed herein;
  • FIG. 26 is an example of a MAC CE when multiple hypotheses are configured per trigger state
  • FIG. 27 is a fifth example of a CSI reporting configuration according to method described herein.
  • FIG. 28 is an example of a MAC CE associating one or more hypotheses with a reporting configuration information element.
  • relational terms such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
  • the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein.
  • the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the joining term, “in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • electrical or data communication may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • Coupled may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
  • network node may be any kind of network node comprised in a radio network which may further comprise any of base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multistandard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), integrated access and backhaul (IAB) node, relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, anode external to the current network), nodes in distributed antenna system (DAS), DAS
  • the non-limiting terms wireless device (WD) or a user equipment (UE) are used interchangeably.
  • the UE herein may be any type of wireless device capable of communicating with a network node or another UE over radio signals, such as UE.
  • the UE may also be a radio communication device, target device, device to device (D2D) UE, machine type UE or UE capable of machine to machine communication (M2M), low-cost and/or low-complexity UE, a sensor equipped with UE, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), an Internet of Things (loT) device, or a Narrowband loT (NB-IOT) device, etc.
  • D2D device to device
  • M2M machine to machine communication
  • M2M machine to machine communication
  • a sensor equipped with UE Tablet
  • smart phone laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles
  • radio network node may be any kind of a radio network node which may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), IAB node, relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
  • RNC evolved Node B
  • MCE Multi-cell/multicast Coordination Entity
  • IAB node IAB node
  • relay node relay node
  • access point radio access point
  • RRU Remote Radio Unit
  • RRH Remote Radio Head
  • wireless devices such as, for example, 3GPP LTE and/or New Radio (NR)
  • WCDMA Wide Band Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes. In other words, it is contemplated that the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, may be distributed among several physical devices.
  • Some embodiments provide spatial and power domain adaptations for network energy savings.
  • FIG. 8 a schematic diagram of a communication system 10, according to an embodiment, such as a 3 GPP-type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14.
  • the access network 12 comprises a plurality of network nodes 16a, 16b, 16c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 18a, 18b, 18c (referred to collectively as coverage areas 18).
  • Each network node 16a, 16b, 16c is connectable to the core network 14 over a wired or wireless connection 20.
  • a first user equipment (UE) 22a located in coverage area 18a is configured to wirelessly connect to, or be paged by, the corresponding network node 16a.
  • a second UE 22b in coverage area 18b is wirelessly connectable to the corresponding network node 16b. While a plurality of UEs 22a, 22b (collectively referred to as wireless devices 22) are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole UE is in the coverage area or where a sole UE is connecting to the corresponding network node 16. Note that although only two UEs 22 and three network nodes 16 are shown for convenience, the communication system may include many more UEs 22 and network nodes 16.
  • a UE 22 may be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16.
  • a UE 22 may have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR.
  • UE 22 may be in communication with an eNB for LTE/E-UTRAN and a gNB for NR/NG-RAN.
  • the communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and/or software of a standalone server, a cloud- implemented server, a distributed server or as processing resources in a server farm.
  • the host computer 24 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider.
  • the connections 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24 or may extend via an optional intermediate network 30.
  • the intermediate network 30 may be one of, or a combination of more than one of, a public, private or hosted network.
  • the intermediate network 30, if any, may be a backbone network or the Internet. In some embodiments, the intermediate network 30 may comprise two or more sub-networks (not shown).
  • the communication system of FIG. 8 as a whole enables connectivity between one of the connected UEs 22a, 22b and the host computer 24.
  • the connectivity may be described as an over-the-top (OTT) connection.
  • the host computer 24 and the connected UEs 22a, 22b are configured to communicate data and/or signaling via the OTT connection, using the access network 12, the core network 14, any intermediate network 30 and possible further infrastructure (not shown) as intermediaries.
  • the OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of routing of uplink and downlink communications.
  • a network node 16 may not or need not be informed about the past routing of an incoming downlink communication with data originating from a host computer 24 to be forwarded (e.g., handed over) to a connected UE 22a. Similarly, the network node 16 need not be aware of the future routing of an outgoing uplink communication originating from the UE 22a towards the host computer 24.
  • a network node 16 is configured to include a CSI configuration determiner 32 configured to determine at least one channel state information, CSI, sub-configuration to be activated.
  • a wireless device 22 is configured to include a CSI configuration unit 34 which is configured to configure CSI reference signal, RS, resources according to the at least one indicated CSI sub-configuration.
  • a host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 10.
  • the host computer 24 further comprises processing circuitry 42, which may have storage and/or processing capabilities.
  • the processing circuitry 42 may include a processor 44 and memory 46.
  • the processing circuitry 42 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • processors and/or processor cores and/or FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 44 may be configured to access (e.g., write to and/or read from) memory 46, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 46 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • Processing circuitry 42 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by host computer 24.
  • Processor 44 corresponds to one or more processors 44 for performing host computer 24 functions described herein.
  • the host computer 24 includes memory 46 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 48 and/or the host application 50 may include instructions that, when executed by the processor 44 and/or processing circuitry 42, causes the processor 44 and/or processing circuitry 42 to perform the processes described herein with respect to host computer 24.
  • the instructions may be software associated with the host computer 24.
  • the software 48 may be executable by the processing circuitry 42.
  • the software 48 includes a host application 50.
  • the host application 50 may be operable to provide a service to a remote user, such as a UE 22 connecting via an OTT connection 52 terminating at the UE 22 and the host computer 24.
  • the host application 50 may provide user data which is transmitted using the OTT connection 52.
  • the “user data” may be data and information described herein as implementing the described functionality.
  • the host computer 24 may be configured for providing control and functionality to a service provider and may be operated by the service provider or on behalf of the service provider.
  • the processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, transmit to and/or receive from the network node 16 and or the wireless device 22.
  • the communication system 10 further includes a network node 16 provided in a communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the UE 22.
  • the hardware 58 may include a communication interface 60 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the communication system 10, as well as a radio interface 62 for setting up and maintaining at least a wireless connection 64 with a UE 22 located in a coverage area 18 served by the network node 16.
  • the radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the communication interface 60 may be configured to facilitate a connection 66 to the host computer 24.
  • the connection 66 may be direct or it may pass through a core network 14 of the communication system 10 and/or through one or more intermediate networks 30 outside the communication system 10.
  • the hardware 58 of the network node 16 further includes processing circuitry 68.
  • the processing circuitry 68 may include a processor 70 and a memory 72.
  • the processing circuitry 68 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 70 may be configured to access (e.g., write to and/or read from) the memory 72, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • volatile and/or nonvolatile memory e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the network node 16 further has software 74 stored internally in, for example, memory 72, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection.
  • the software 74 may be executable by the processing circuitry 68.
  • the processing circuitry 68 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16.
  • Processor 70 corresponds to one or more processors 70 for performing network node 16 functions described herein.
  • the memory 72 is configured to store data, programmatic software code and/or other information described herein.
  • the software 74 may include instructions that, when executed by the processor 70 and/or processing circuitry 68, causes the processor 70 and/or processing circuitry 68 to perform the processes described herein with respect to network node 16.
  • processing circuitry 68 of the network node 16 may include a CSI configuration determiner 32 configured to determine at least one channel state information, CSI, sub-configuration to be activated.
  • the communication system 10 further includes the UE 22 already referred to.
  • the UE 22 may have hardware 80 that may include a radio interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the UE 22 is currently located.
  • the radio interface 82 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the hardware 80 of the UE 22 further includes processing circuitry 84.
  • the processing circuitry 84 may include a processor 86 and memory 88.
  • the processing circuitry 84 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • the processor 86 may be configured to access (e.g., write to and/or read from) memory 88, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 88 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the UE 22 may further comprise software 90, which is stored in, for example, memory 88 at the UE 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the UE 22.
  • the software 90 may be executable by the processing circuitry 84.
  • the software 90 may include a client application 92.
  • the client application 92 may be operable to provide a service to a human or non-human user via the UE 22, with the support of the host computer 24.
  • an executing host application 50 may communicate with the executing client application 92 via the OTT connection 52 terminating at the UE 22 and the host computer 24.
  • the client application 92 may receive request data from the host application 50 and provide user data in response to the request data.
  • the OTT connection 52 may transfer both the request data and the user data.
  • the client application 92 may interact with the user to generate the user data that it provides.
  • the processing circuitry 84 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by UE 22.
  • the processor 86 corresponds to one or more processors 86 for performing UE 22 functions described herein.
  • the UE 22 includes memory 88 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 90 and/or the client application 92 may include instructions that, when executed by the processor 86 and/or processing circuitry 84, causes the processor 86 and/or processing circuitry 84 to perform the processes described herein with respect to UE 22.
  • the processing circuitry 84 of the wireless device 22 may include a CSI configuration unit 34 which is configured to configure CSI reference signal, RS, resources according to the at least one indicated CSI sub-configuration.
  • the inner workings of the network node 16, UE 22, and host computer 24 may be as shown in FIG. 9 and independently, the surrounding network topology may be that of FIG. 8.
  • the OTT connection 52 has been drawn abstractly to illustrate the communication between the host computer 24 and the wireless device 22 via the network node 16, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • Network infrastructure may determine the routing, which it may be configured to hide from the UE 22 or from the service provider operating the host computer 24, or both. While the OTT connection 52 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).
  • the wireless connection 64 between the UE 22 and the network node 16 is in accordance with the teachings of the embodiments described throughout this disclosure.
  • One or more of the various embodiments improve the performance of OTT services provided to the UE 22 using the OTT connection 52, in which the wireless connection 64 may form the last segment. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the UE 22, or both.
  • sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 48, 90 may compute or estimate the monitored quantities.
  • the reconfiguring of the OTT connection 52 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect the network node 16, and it may be unknown or imperceptible to the network node 16. Some such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary UE signaling facilitating the host computer’s 24 measurements of throughput, propagation times, latency and the like.
  • the measurements may be implemented in that the software 48, 90 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 52 while it monitors propagation times, errors, etc.
  • the host computer 24 includes processing circuitry 42 configured to provide user data and a communication interface 40 that is configured to forward the user data to a cellular network for transmission to the UE 22.
  • the cellular network also includes the network node 16 with a radio interface 62.
  • the network node 16 is configured to, and/or the network node’s 16 processing circuitry 68 is configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the UE 22, and/or preparing/terminating/maintaining/ supporting/ending in receipt of a transmission from the UE 22.
  • the host computer 24 includes processing circuitry 42 and a communication interface 40 that is configured to a communication interface 40 configured to receive user data originating from a transmission from a UE 22 to a network node 16.
  • the UE 22 is configured to, and/or comprises a radio interface 82 and/or processing circuitry 84 configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the network node 16, and/or preparing/terminating/maintaining/ supporting/ending in receipt of a transmission from the network node 16.
  • FIGS. 8 and 9 show various “units” such as CSI configuration determiner 32, and CSI configuration unit 34 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
  • FIG. 10 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIGS. 8 and 2, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a UE 22, which may be those described with reference to FIG. 9.
  • the host computer 24 provides user data (Block S100).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50 (Block S102).
  • the host computer 24 initiates a transmission carrying the user data to the UE 22 (Block SI 04).
  • the network node 16 transmits to the UE 22 the user data which was carried in the transmission that the host computer 24 initiated, in accordance with the teachings of the embodiments described throughout this disclosure (Block SI 06).
  • the UE 22 executes a client application, such as, for example, the client application 92, associated with the host application 50 executed by the host computer 24 (Block S108).
  • FIG. 11 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG. 8, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a UE 22, which may be those described with reference to FIGS. 8 and 9.
  • the host computer 24 provides user data (Block SI 10).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50.
  • the host computer 24 initiates a transmission carrying the user data to the UE 22 (Block SI 12).
  • the transmission may pass via the network node 16, in accordance with the teachings of the embodiments described throughout this disclosure.
  • the UE 22 receives the user data carried in the transmission (Block SI 14).
  • FIG. 12 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG. 8, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a UE 22, which may be those described with reference to FIGS. 8 and 9.
  • the UE 22 receives input data provided by the host computer 24 (Block SI 16).
  • the UE 22 executes the client application 92, which provides the user data in reaction to the received input data provided by the host computer 24 (Block SI 18).
  • the UE 22 provides user data (Block S120).
  • the UE provides the user data by executing a client application, such as, for example, client application 92 (Block SI 22).
  • client application 92 may further consider user input received from the user.
  • the UE 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (Block SI 24).
  • the host computer 24 receives the user data transmitted from the UE 22, in accordance with the teachings of the embodiments described throughout this disclosure (Block SI 26).
  • FIG. 13 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG. 8, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a UE 22, which may be those described with reference to FIGS. 8 and 9.
  • the network node 16 receives user data from the UE 22 (Block SI 28).
  • the network node 16 initiates transmission of the received user data to the host computer 24 (Block SI 30).
  • the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (Block SI 32).
  • FIG. 14 is a flowchart of an example process in a network node 16 for spatial and power domain adaptations for network energy savings.
  • One or more blocks described herein may be performed by one or more elements of network node 16 such as by one or more of processing circuitry 68 (including the CSI configuration determiner 32), processor 70, radio interface 62 and/or communication interface 60.
  • Network node 16 such as via processing circuitry 68 and/or processor 70 and/or radio interface 62 and/or communication interface 60 is configured to determine at least one channel state information, CSI, sub-configuration to be activated (Block S134).
  • the process also includes transmitting to the UE a trigger state indicator to activate the at least one CSI sub- configuration, each of the at least one activated CSI sub-configuration including an adaptation parameter setting for a spatial domain and/or a power domain (Block SI 36).
  • the method further includes determining the at least one activated CSI sub-configuration based at least in part on a CSI report from the UE. In some embodiments, the method also includes activating a first set of at least one CSI subconfiguration, receive the CSI report, and then activate a second CSI sub-configuration based at least in part on the CSI report.
  • the trigger state points to at least one CSI reference signal resource set. In some embodiments, a trigger state is associated with at least one CSI sub-configuration.
  • FIG. 15 is a flowchart of an example process in a wireless device 22 according to some embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of wireless device 22 such as by one or more of processing circuitry 84 (including the CSI configuration unit 34), processor 86, radio interface 82 and/or communication interface 60.
  • Wireless device 22 such as via processing circuitry 84 and/or processor 86 and/or radio interface 82 is configured to receive a trigger state indicator to indicate at least one channel state information, CSI, subconfiguration to be activated, each of the at least one indicated CSI sub-configuration including an adaptation parameter setting for a spatial domain and/or a power domain (Block S138).
  • the process also includes configuring CSI reference signal, RS, resources according to the at least one indicated CSI sub-configuration (Block S140).
  • the method includes transmitting at least one CSI report according to at least one indicated CSI sub-configuration.
  • the trigger state indicator is contained in a medium access control control element, MAC CE.
  • the trigger state indicator points to at least one CSI reference signal resource set.
  • a trigger state indicator is received on radio resource control, RRC, signaling.
  • FIG. 16 is a flowchart of an example process in a network node 16 for spatial and power domain adaptations for network energy savings.
  • One or more blocks described herein may be performed by one or more elements of network node 16 such as by one or more of processing circuitry 68 (including the CSI configuration determiner 32), processor 70, radio interface 62 and/or communication interface 60.
  • Network node 16 such as via processing circuitry 68 and/or processor 70 and/or radio interface 62 and/or communication interface 60 is configured to configure the UE via radio resource control, RRC, signaling with a channel state information, CSI, reporting configuration having at least one subconfiguration, each subconfiguration including a spatial adaption parameter setting and/or a power adaptation parameter setting (Block S142).
  • the method includes indicating to the UE, via a medium access control, MAC, control element, CE, at least one of the at least one subconfiguration to be activated (Block SI 44).
  • the method includes receiving a CSI report, from the UE, according to at least one of the indicated at least one subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, each of the plurality of subconfigurations including a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates to the UE deactivation of at least one of the plurality of subconfigurations.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be activated.
  • the MAC CE indicates to the UE which of the plurality of subconfiguration is to be deactivated.
  • a single MAC CE activates or deactivates the plurality of subconfigurations. In some embodiments, activation or deactivation of each subconfiguration of the plurality of subconfigurations is indicated by a bitmap of bits in the MAC CE.
  • FIG. 17 is a flowchart of an example process in a wireless device 22 according to some embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of wireless device 22 such as by one or more of processing circuitry 84 (including the CSI configuration unit 34), processor 86, radio interface 82 and/or communication interface 60.
  • Wireless device 22 such as via processing circuitry 84 and/or processor 86 and/or radio interface 82 is configured to receive, via radio resource control, RRC, signaling, a channel state information, CSI, reporting configuration having at least one subconfiguration, each of the at least one subconfiguration including a spatial adaptation parameter setting and/or a power adaptation parameter setting (Block S146).
  • the method also includes receiving a medium access control, MAC, control element, CE, indicating at least one of the at least one subconfiguration to be activated (Block S148).
  • the MAC CE may indicate activation of at least one of the at least one subconfiguration.
  • the method includes reporting CSI according to at least one of the at least one indicated subconfiguration.
  • the CSI reporting configuration has a plurality of subconfigurations, and each of the plurality of subconfigurations includes a spatial adaptation parameter setting and/or a power adaptation parameter setting.
  • the MAC CE further indicates deactivation of at least one of the plurality of subconfigurations.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be activated.
  • the MAC CE indicates to the UE which of the plurality of subconfigurations is to be deactivated.
  • a single MAC CE activates or deactivates the plurality of subconfigurations. In some embodiments, activation or deactivation of each subconfiguration of the plurality of subconfigurations is indicated by a bitmap of bits in the MAC CE.
  • a UE 22 may be notified which of the subconfigurations (hypotheses) related to power and/spatial domain adaptations become activate or inactivate by the network node 16. It is assumed that the UE 22 has been preconfigured with said sub-configurations (hypotheses) via RRC signaling.
  • the network node 16 may (de-)activate one or more of the hypotheses based on internal assessment or based on reports from the UEs specific to the hypotheses.
  • the UE 22 may, for example, have been previously dynamically triggered to measure and report CSI on an uplink (UL) channel corresponding to one or more spatial domain and/or one or more power domain adaptation hypotheses.
  • UL uplink
  • the UE 22 may be configured with the following through RRC signaling:
  • One or more sub-configurations configured within a CSI reporting configuration (e.g., within the information element CSI-ReportConfig) where a sub-configuration includes a particular combination of spatial and/or power domain adaptation parameter settings;
  • One or more sub-configuration indicators configured within an aperiodic trigger state (e.g., within the information element CSI- AperiodicTriggerStateList, or semiPersistentOnPUSCH-TriggerStateList) that each point to a sub-configuration within a CSI reporting configuration; and/or
  • One or more CSI resource configurations (e.g., the information element CSI-ResourceConfig) associated with the CSI reporting configuration which includes one or more CSI-RS resource sets on which the UE 22, when triggered, measures CSI based on the spatial and/or power domain adaptation parameter settings in a sub-configuration.
  • Each CSI-RS resource set may include one or more CSI-RS resources or indicators (ID) of one or more CSI-RS resources.
  • a sub-configuration may include one or more of the following example power and/or spatial domain adaptation parameter settings for which the UE 22 may measure and report CSI:
  • a PDSCH-to-CSI-RS power offset e.g., parameter powerControlOffset
  • a CSI-RS to SSB power offset e.g., parameter powerControlOffsetS S ;
  • Indicator of a potential spatial or power adaptation delay e.g., ⁇ 0,0, 5, 1,1.5, ..,3 ⁇ ms or in terms of slots and so on;
  • This embodiment is illustrated by way of an example shown in FIG. 18.
  • CSI-ReportConfig One report configuration linked to all of the trigger states which includes 3 sub-configurations: o
  • the report configuration includes a set of common parameters that apply to all 3 sub-configurations;
  • One resource configuration including a single CSI-RS resource set with a single CSI-RS resource.
  • Trigger State 1 is configured with a list of 3 sub-configuration indicators ⁇ 1,2,3 ⁇ . Hence, if the UE 22 is indicated with this trigger state, it measures and reports 3 CSIs according to the spatial and/or power domain adaptation settings in sub-configurations 1, 2, and 3, respectively.
  • This trigger state may be used, for example, for the network node 16 to obtain CSIs for multiple spatial/power domain adaptation parameter settings.
  • hypotheses may be considered as hypotheses, and the network node 16 may use them along with other power saving criteria to decide which settings it prefers to adapt.
  • the network node 16 may then choose to activate one or more of the power/spatial domain parameter settings (hypotheses) based on these UE 22 reports and/or based on internal assessment. For example, the network node 16 may decide to activate all spatial elements even if a portion of the spatial elements would be good enough to serve a specific UE’s quality of service (QoS) demands.
  • QoS quality of service
  • the network node 16 may for example choose to do so because the current traffic load is high.
  • the network node 16 may inform the UE 22 about the setting. As such, both the UE 22 and the network node 16 may be in synchronization (have the same understanding) of upcoming transmission configurations.
  • the network node 16 may inform the UE 22 via activation/ deactivation commands. After UE reception of the activation/deactivation command, the UE 22 and the network node 16 may know that transmissions will be according to an indicated sub-configuration after the optionally configured spatial or power adaptation delay (e.g., ⁇ 0,0,5, 1,1.5, ..,3 ⁇ ms mentioned earlier), or immediately if not configured, or according to a delay specified in the specifications.
  • the network node 16 may inform the UE 22 about activation/deactivation of a hypothesis via a newly introduced MAC-CE. An example of such MAC-CE is shown in FIG. 19.
  • 1 bit is used as activate/deactivate flag. If the bit is set, the UE 22 understands that the network node 16 intends to activate a certain hypothesis (sub-configuration of a trigger state). Furthermore, in this example, the serving cell id and bandwidth part (BWP) id are provided. This is useful in case the activation/deactivation is only applicable to a specific cell (e.g., out of several in case of carrier aggregation) and/or a specific BWP. Note however that there may be other examples without the Serving Cell ID and/or BWP ID (i.e., those bits may be either reserved or not present in other MAC-CE examples). Furthermore, in the MAC-CE example of FIG.
  • one or more trigger states are indicated by 7 bits each being able to address one of 128 trigger states.
  • the R in the figure denotes a reserved bit (may be used for future use) and is there for the sake of octet alignment of the MAC-CE (its position is only exemplary and may be different, e.g., at the end of the octet instead of at front).
  • one or more trigger states are either activated or deactivated per MAC-CE. This means that in case some hypotheses are to be activated while some deactivated at the same time, two MAC-CE transmissions may be necessary.
  • MAC-CE may be as below in which through the same MAC-CE both activation and deactivation of trigger state sub-configurations is possible (each trigger state is accompanied with an A/D flag instead). This is shown in FIG. 20.
  • Embodiment # 1 is a variation of Embodiment # 1 in which:
  • At least one trigger state points to a CSI-RS resource set within a CSI resource configuration (CSI-ResourceConfig) that includes N CSI-RS resources, where N > 1;
  • CSI-ResourceConfig CSI resource configuration
  • Said trigger state is configured according to one of the following methods: o Sub-configuration indicator is absent (not configured):
  • the CSI reporting configuration (CSI- ReportConfig) linked to this trigger state may or may not include subconfigurations; o Sub-configuration indicator is present; and/or
  • the UE 22 reports N CSIs, one per CSI-RS resource in said CSI-RS resource set.
  • FIG. 21 This embodiment is illustrated by way of an example shown in FIG. 21.
  • One report configuration (CSI-ReportConfig) linked to all of the trigger states: o Sub-configurations are absent; o The report configuration includes the parameter reportQuanitity2 ‘multi-RI-PMI-CQI’; o It is assumed that the legacy parameter reportQuantity is contained in the common parameters and is configured with value ‘cri-RI-PMI- CQF; One resource configuration (CSI-ResourceConfig) including 4 CSI-RS resource sets: o Set 1 includes 3 CSI-RS resources; and/or o Set 2,3, and 4 include a single CSI-RS resource.
  • each trigger state points to a single one amongst 4 different NZP CSI-RS resource sets configured within CSI-ResourceConfig.
  • Trigger State 1 points to a CSI-RS resource set configured with 3 CSI-RS resources.
  • the UE 22 measures and reports ⁇ RI, PMI, CQI ⁇ for each of the 3 CSI-RS resources in the set.
  • This trigger state may be used, for example, for the network node 16 to obtain CSIs for multiple Type 2 antenna muting patterns (see above for definition of Type2 antenna muting).
  • the 3 CSI-RS resources may be configured with three different values of the CSI-RS to SSB power offset parameter powerControlOffsetSS, e.g., 0, -3, -6 dB, respectively. These may be considered as hypotheses, and the network node 16 may use them along with other power saving criteria to decide which settings it prefers to adapt.
  • the network node 16 may indicate to the UE 22 one of the other trigger states that point to a CSI-RS resource set with only a single CSI-RS resource for future CSI requests.
  • the network node 16 may indicate Trigger State 3 to the UE 22 such that it knows that the CSI-RS power has changed.
  • the network node 16 may inform the UE 22 via activation/deactivation commands.
  • the UE 22 and the network node 16 After UE reception of the activation/deactivation command, the UE 22 and the network node 16 would know that transmissions will be according to the indicated subconfiguration after the optionally configured spatial or power adaptation delay (e.g., ⁇ 0,0, 5, 1,1.5, ..,3 ⁇ ms mentioned earlier), or immediately if not configured, or according to a delay specified in the specifications.
  • the network node 16 may inform the UE 22 about activation/deactivation of a hypothesis via a newly introduced MAC-CE. Two examples of such MAC-CE are shown in FIG. 22, one with a common activation/deactivation flag, the other with individual flags per resource set.
  • 1 bit is used as activate/deactivate flag. If the bit is set, the UE 22 understands that the network node 16 intends to activate a certain hypothesis (sub- configuration). Furthermore, in these examples, the serving cell id and bandwidth part (BWP) id are provided, but may be omitted in other examples.
  • BWP bandwidth part
  • This embodiment is a variation of Embodiment #1 and/or 2 in which
  • At least one sub-configuration within a CSI reporting configuration includes a parameter that points to a CSI-RS resource set configured within a CSI resource configuration (CSI-ResourceConfig):
  • the indicator may be a new RRC parameter, e.g., resourceSet2.
  • This embodiment is illustrated by way of an example shown in FIG. 23.
  • a MAC-CE is used here to inform the UE 22 about hypothesis (de-)activation. Examples of such MAC-CE are shown in FIG. 24.
  • a hypothesis ID is included (Hyp ID) to address individual hypothesis.
  • Hyp ID a hypothesis ID
  • a common A/D flag is used.
  • an A/D flag may be used per Report Config but then with fewer bits for addressing Report Configs (e.g., 5 bits for addressing up to 32 Report Configs).
  • one single trigger state may point out multiple subconfigurations.
  • the network node 16 cannot or does not want to configure the UE 22 with multiple trigger states.
  • the UE 22 may not be capable of handling more than certain number of trigger states.
  • the UE capability maxNumberAperiodicCSI-triggeringStatePerCC is only set to n3 (i.e., three trigger states maximum per CC) and the network node 16 already needs those trigger states as regular (without sub-configuration) trigger states.
  • the various trigger states may have the same configuration parameters except for the sub-configurations and the network node 16 does not wish to maintain or repeat the very same configuration parameter in multiple trigger state configurations. Therefore, in this embodiment, the trigger states are extended with multiple sub-configurations. This is very similar to the embodiment above in which multiple hypotheses are configured in the same ReportConfig. See FIG. 25.
  • a MAC-CE is used here to inform the UE 22 about hypothesis (de-)activation. Examples of such MAC-CE is shown in FIG. 26.
  • Trigger State structure holds multiple hypotheses (4 in this example), a hypothesis ID is included (Hyp ID) to address individual hypothesis. Similar to the other embodiments, an A/D flag may be used per trigger state (MAC-CE example on the right side).
  • Embodiment #5 (common to all above)
  • the UE 22 may be indicated through RRC signaling whether the one or more of the sub-configurations are initially active, rather than first being activated through MAC-CE (or any other potential activation signaling such as DCI). I.e., the initial state of the hypotheses is configured and may be later changed via lower layer signaling such as with the MAC-CE examples given above.
  • the initial state of the sub-configuration is always reset to a specified state (e.g., inactive) upon configuration update via RRC signaling.
  • a specified state e.g., inactive
  • the network node 16 may have activated a certain hypothesis, but after an RRC reconfiguration (e.g., in which CSI-RS is reconfigured, or any other type of RRC reconfiguration such as related to handover), the UE 22 may revert to the specified state.
  • the one or more MAC CE may additionally include a CSI- ReportConfig ID for at least a TriggerState Index in addition to one or more associated hypothesis IDs.
  • a single trigger state may be associated with multiple CSI-ReportConfig, each associated with a carrier and with one or more sub-configurations.
  • the MAC CE may be used to update a trigger state for a particular carrier (or carriers) for one or more CSI-ReportConfig and associated hypotheses or sub-configurations.
  • Embodiment # 1 is a variation of Embodiment # 1 in which:
  • At least one trigger state points to a CSI-RS resource set within a CSI resource configuration (CSI-ResourceConfig) that includes N CSI-RS resources, where N > 1;
  • CSI-ResourceConfig CSI resource configuration
  • Said trigger state is configured according to one of the following methods: o Sub-configuration indicator is absent (not configured);
  • the CSI reporting configuration (CSI- ReportConfig) linked to this trigger state may or may not include sub-configurations: o Sub-configuration indicator is present; and/or
  • the UE 22 reports N CSIs, one per CSI-RS resource in said CSI-RS resource set.
  • FIG. 27 This embodiment is illustrated by way of an example shown in FIG. 27.
  • One report configuration (CSI-ReportConfig) linked to all of the trigger states which includes 3 sub-configurations: o
  • the report configuration includes a set of common parameters that apply to all 3 sub-configurations; and/or
  • One resource configuration including a single CSI-RS resource set with a single CSI-RS resource.
  • Trigger State 1 is configured with a list of 3 sub-configuration indicators ⁇ 1,2,3 ⁇ . Hence, if the UE 22 is indicated with this trigger state, it measures and reports 3 CSIs according to the spatial and/or power domain adaptation settings in sub-configurations 1, 2, and 3, respectively.
  • This trigger state may be used, for example, for the network node 16 to obtain CSIs for multiple spatial/power domain adaptation parameter settings. These may be considered as hypotheses, and the network node 16 may use them along with other power saving criteria to decide which settings it prefers to adapt.
  • Embodiment B2 The method of Embodiment Bl, further comprising determining the at least one activated CSI sub-configuration based at least in part on a CSI report from the WD.
  • Embodiment B4 The method of any of Embodiments B1-B3, wherein the trigger state points to at least one CSI reference signal resource set.
  • Embodiment B5 The method of any of Embodiments B1-B4, wherein a trigger state is associated with at least one CSI sub-configuration.
  • a wireless device configured to communicate with a network node, the WD configured to, and/or comprising a radio interface and/or processing circuitry configured to: receive a trigger state indicator to indicate at least one channel state information, CSI, sub-configuration to be activated, each of the at least one indicated CSI subconfiguration including an adaptation parameter setting for at least one of a spatial domain and a power domain; and configure CSI reference signal, RS, resources according to the at least one indicated CSI sub-configuration.
  • Embodiment C2 The WD of Embodiment Cl, wherein the network node, radio interface and/or processing circuitry are further configured to transmit at least one CSI report according to at least one indicated CSI sub-configuration.
  • Embodiment C3 The WD of Embodiment C2, wherein the trigger state indicator is contained in a medium access control control element, MAC CE.
  • Embodiment C4 The WD of any of Embodiments C1-C3, wherein the trigger state indicator points to at least one CSI reference signal resource set.
  • Embodiment C5. The WD of any of Embodiments C1-C4, wherein a trigger state indicator is received on radio resource control, RRC, signaling.
  • RRC radio resource control
  • Embodiment DI A method implemented in a wireless device, WD, configured to communicate with a network node, the method comprising: receiving a trigger state indicator to indicate at least one channel state information, CSI, sub-configuration to be activated, each of the at least one indicated CSI subconfiguration including an adaptation parameter setting for at least one of a spatial domain and a power domain; and configuring CSI reference signal, RS, resources according to the at least one indicated CSI sub-configuration.
  • Embodiment D2 The method of Embodiment DI, further comprising transmitting at least one CSI report according to at least one indicated CSI subconfiguration.
  • Embodiment D3 The method of Embodiment D2, wherein the trigger state indicator is contained in a medium access control control element, MAC CE.
  • Embodiment D4 The method of any of Embodiments D1-D3, wherein the trigger state indicator points to at least one CSI reference signal resource set.
  • Embodiment D5 The method of any of Embodiments D1-D4, wherein a trigger state indicator is received on radio resource control, RRC, signaling.
  • RRC radio resource control
  • the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. Accordingly, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects all generally referred to herein as a “circuit” or “module.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. Furthermore, the disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied in the medium that may be executed by a computer. Any suitable tangible computer readable medium may be utilized including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.
  • These computer program instructions may also be stored in a computer readable memory or storage medium that may direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • Computer program code for carrying out operations of the concepts described herein may be writen in an object oriented programming language such as Python, Java® or C++.
  • the computer program code for carrying out operations of the disclosure may also be writen in conventional procedural programming languages, such as the "C" programming language.
  • the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer.
  • the remote computer may be connected to the user's computer through a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.

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

Abstract

L'invention concerne un procédé, un nœud de réseau et un équipement utilisateur (UE) pour des adaptations de domaine spatial et de puissance pour des économies d'énergie de réseau. Selon un aspect, un procédé dans un UE consiste à recevoir, par le biais d'une signalisation de commande de ressources radio (RRC), une configuration de rapport d'informations d'état de canal (CSI) comprenant au moins une sous-configuration, chacune de la ou des sous-configurations comprenant un réglage de paramètre d'adaptation spatiale et/ou un réglage de paramètre d'adaptation de puissance. Le procédé consiste également à recevoir un élément de commande (CE) de commande d'accès au support (MAC) indiquant au moins l'une des au moins une sous-configuration à activer.
PCT/EP2024/059339 2023-04-05 2024-04-05 Adaptations de domaine spatial et de puissance pour des économies d'énergie de réseau Pending WO2024209057A1 (fr)

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NAIZHENG ZHENG ET AL: "Techniques in spatial and power domains", vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 17 February 2023 (2023-02-17), XP052247296, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/TSG_RAN/WG1_RL1/TSGR1_112/Docs/R1-2300143.zip R1-2300143 - Techniques in spatial and power domains.docx> [retrieved on 20230217] *

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