Rapid acquisition of channel state information
By leveraging downlink and uplink reciprocity and advanced signaling, the method facilitates rapid CSI acquisition before and after cell switching, improving communication efficiency and reducing scheduling inefficiencies.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2024-11-08
- Publication Date
- 2026-05-15
AI Technical Summary
Existing communication technologies lack rapid and efficient methods for acquiring channel state information (CSI), particularly during cell switching, leading to suboptimal scheduling and inefficient uplink and downlink transmissions.
The method enables early or rapid CSI acquisition by utilizing downlink and uplink reciprocity, employing various reference signals, and implementing signaling mechanisms such as MAC CE, DCI, and RRC to trigger RS measurement and CSI reporting before and after cell switching, even in idle or inactive states.
This approach allows for accurate and timely CSI acquisition, preventing conservative scheduling and enhancing uplink and downlink signal communication quality, especially during handovers and other scenarios.
Smart Images

Figure CN2024130789_15052026_PF_FP_ABST
Abstract
Description
RAPID ACQUISITION OF CHANNEL STATE INFORMATIONTECHNICAL FIELD
[0001] This patent document is directed to digital communications.BACKGROUND
[0002] Mobile communication technologies are moving the world toward an increasingly connected and networked society. The rapid growth of mobile communications and advances in technology have led to greater demand for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency are also important to meeting the needs of various communication scenarios. Various techniques, including new ways to provide higher quality of service, longer battery life, and improved performance are being discussed.SUMMARY
[0003] This patent document describes, among other things, techniques for acquisition of channel state information (CSI) .
[0004] In one example aspect, a method for wireless communication includes receiving, by a first communication device from a second communication device, information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, a transmission resource to carry CSI reporting, a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command; and transmitting, by the first communication device, a channel state information (CSI) reporting to the second communication device or a third communication device, based on one or more received information.
[0005] In another example aspect, a method for wireless communication includes receiving, by a second communication device or a third communication device, a channel state information (CSI) reporting from a first communication device, based on one or more received information, wherein the CSI reporting is based on an information transmitted from the second communication device to the first communication device, the information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, UL a transmission resource to carry CSI reporting, RACH a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command.
[0006] In another example aspect, a communication apparatus is disclosed. The apparatus includes at least one processor that is configured to cause the communication apparatus above-described method.
[0007] In yet another example aspect, a computer-program storage medium is disclosed. The computer-program storage medium includes code stored thereon. The code, when executed by at least one processor, causes the at least one processor to cause a communication apparatus to implement a described method.
[0008] These, and other, aspects are described in the present document.BRIEF DESCRIPTION OF DRAWINGS
[0009] FIG. 1 discloses a framework for CSI acquisition.
[0010] FIG. 2 illustrates an example of a wireless communication network.
[0011] FIG. 3 is a block diagram representation of a portion of a hardware platform in accordance with one or more embodiments of the present technology can be applied.
[0012] FIGS. 4A-4B are flowcharts for wireless communication method examples.DETAILED DESCRIPTION
[0013] Section headings are used in the present document only to improve readability and do not limit scope of the disclosed embodiments and techniques in each section to only that section. Furthermore, some embodiments are described with reference to Third Generation Partnership Project (3GPP) Fifth Generation (5G) New Radio (NR) or Sixth Generation (6G) standard for ease of understanding and the described technology may be implemented in different wireless system that implement protocols other than the NR or 6G protocol.
[0014] 1. Initial discussion
[0015] In the existing specifications published by the 3GPP, channel state information (CSI) acquisition is applied for a serving cell. The existing framework of CSI acquisition includes reference signal (RS) based measurement and CSI reporting corresponding to RS measurement. The time domain of CSI reporting is periodic, aperiodic, or semi-persistent. Aperiodic CSI reporting is triggered by physical layer signaling called downlink control information (DCI) . In other words, the CSI reporting is not triggered by a layer 2 signal such as a medium access control (MAC) control element (CE) , or MAC CE. In the current 3GPP standard, semi-persistent CSI reporting is activated by MAC CE, but not based on a low layer triggered mobility (LTM) cell switching MAC CE. Resource to carrying CSI reporting is determined by the time domain allocation of physical uplink shared control channel (PUSCH) field in DCI or physical uplink control channel (PUCCH) resource configured by RRC, not using MAC CE. Further, the current 3GPP protocol does not also support early or fast CSI acquisition in which channel state is rapidly achieved by a communication device.
[0016] To solve the technical problem of rapid acquisition of channel state information, among other problems, we provide a method on CSI acquisition to achieve fast acquisition of channel state information and ensure high quality of UL / DL transmission before and after cell switching. The channel state information may include information items such as precoding matrix indicator (PMI) , rank indicator (RI) and channel quality indicator (CQI) that can be used to improve uplink (UL) and downlink (DL) signal communication. In one example beneficial aspect, the rapid acquisition of accurate information about the communication channel will avoid a device to be served with conservative scheduling, e.g., scheduling using a low modulation and coding scheme or rank (e.g., MCS / RI) or an unsuitable PMI, etc. As further disclosed herein, the method of CSI acquisition is not only limited for handover case, but also is applied for other usage or cases. In some embodiments, CSI acquisition can be achieved by at least one of RS measurement and CSI report.
[0017] In the patent document, RS can be at least one of: Synchronization Signal / physical broadcast channel PBCH (SSB) , Channel State Information Reference Signal (CSI-RS) , Demodulation Reference Signal (DMRS) , Tracking Reference Signal (TRS) , Phase tracking reference signals (PT-RS) , Sounding Reference Signal (SRS) .
[0018] In the patent document, CSI acquisition can be achieved based on Downlink and Uplink reciprocity. To be specific, network or base station can obtain downlink CSI from uplink transmission based on Downlink and Uplink reciprocity. Wherein, uplink transmission includes at least one of SRS, data, PUSCH, DMRS, and so on.
[0019] In the patent document, a device can be at least one of User Equipment (UE) , Base Station (BS) , Transmit Receive Point (TRP) , Point.
[0020] In the patent document, switching can be at least one of: BWP switching, cell switching, beam switching, carrier switching, RS resource / set switching, reporting configuration switching, TRP switching, BWP group switching, cell group switching, beam group switching, carrier group switching, RS resource / set group switching, reporting configuration group switching, TRP group switching.
[0021] In the patent document, a signaling can be at least one of DCI, MAC CE, RRC. In some examples, the MAC CE can be used to trigger switching.
[0022] In the patent document, a signaling is transmitted to be used for triggering or indicating at least one of: a RS measurement, CSI reporting, RACH procedure, TRS tracking, switching, TCI state, RS resource / set, offset in time or frequency domain, resource for transmission.
[0023] In the patent document, regarding aperiodic trigger state, a list of aperiodic trigger states is configured by a first signaling. In some examples, the number of aperiodic trigger states is K. In some examples, K is an integer larger than or equal to 1. For examples, K can be one of 1, 2, 3, 4, 5, 6, 7, 8, ...., 128, 129, ....., 1024, 1025, or any combination of value above. In some examples, the first signaling can be at least one of RRC, MAC CE, DCI, or pre-configuration.
[0024] In some examples, one aperiodic trigger state is configured or associated with one or more associated CSI reporting configuration information or CSI reporting configurations. In some examples, associated CSI reporting configuration information or CSI reporting configuration can be used for LTM or CSI acquisition or UE triggered reporting or other scenarios or usages. In some examples, one or more CSI reporting configuration are configured or associated with one or more RS resources or RS resource sets or RS resource configuration or RS resource set configuration. In some examples, one or more RS resources or RS resource sets or RS resource configurations or RS resource set configurations can be used for LTM or CSI acquisition or UE triggered reporting or other scenarios or usages.
[0025] In the patent document, a second signaling is used to select or update a subset of aperiodic trigger states from a list of aperiodic trigger states. In some examples, the second signaling can be at least one of RRC, MAC CE, DCI, or pre-configuration. In some examples, an aperiodic trigger state is mapped to a codepoint of CSI request field.
[0026] In the patent document, a third signaling is used to indicate one trigger state or a codepoint of CSI request field or a value corresponding to a codepoint of CSI request field. In some examples, codepoint of CSI request field can be used to at least one of: no CSI reporting, indicate a trigger state.
[0027] In the patent document, techniques applied to “acell” may refer to at least one of a serving cell, a candidate cell, a non-serving cell, a neighbor cell, additional cells, a virtual cell, a super cell, a bandwidth part (BWP) , a carrier, band, or a frequency. In some examples, cell can be a first cell or a second cell or an n-th cell.
[0028] In the patent document, a first communication device is a user device. A second communication device or a third communication device is a network device.
[0029] In the patent document, an information can be at least one of: one or more channel state information (CSI) reporting configurations, one or more RS resources or sets, one or more cell configuration, indication on whether to enable CSI acquisition, UL resource to carry CSI reporting, RACH configuration, TCI state configuration, trigger state configuration, handover command, TCI state ID, TA, RS resource or set ID, CSI reporting configuration ID. In some examples, the information can be transmitted by at least one of RRC, MAC CE, DCI.
[0030] In the patent document, handover command can be at least one of L1 / L2 triggered mobility handover command, L3 triggered mobility handover, conditional handover command, DAPS handover command.
[0031] In the existing specification or communication technology, CSI acquisition is achieved after UE is in the connected state, or completes a cell handover. However, in the patent document, CSI acquisition including at least one of RS measurement and CSI reporting can be achieved when UE is in the idle or inactive state, or before completion of cell switching or RRC reconfiguration complete. In such case, such CSI acquisition can be called as “early or rapid CSI acquisition” or “early or rapid RS measurement or transmission” or “early or rapid CSI reporting” .
[0032] In the patent document, any scheme or content or feature can be used independently or in combination.
[0033] Embodiment 1
[0034] Framework or procedure of CSI acquisition
[0035] For rapid acquisition of CSI, embodiments may use one or more of the following. Therefore, the framework includes one or more of: RS based measurement, CSI reporting.
[0036] FIG. 1 is an example of framework of CSI acquisition.
[0037] In some examples, if CSI acquisition is configured or enabled, at least one of the following framework of CSI acquisition can considered:
[0038] Case-1: CSI reporting is performed or started after reception of a signaling or information;
[0039] Regarding RS measurement corresponding to CSI reporting, at least one of the following can be considered:
[0040] Case-1.1: RS measurement is performed before reception of the signaling or information;
[0041] Case-1.2: RS measurement is performed before and / or after reception of the signaling or information;
[0042] Case-1.3: RS measurement is performed after reception of the signaling or information;
[0043] Case-2: CSI reporting is performed or started before reception of a signaling or information;
[0044] Case-2.1: RS measurement is performed before reception of the signaling or information;
[0045] In some examples, one or more cases mentioned above can be configured or supported based on NW configuration, or UE capability.
[0046] In some examples, the signaling or information can be one or more of: MAC CE, DCI, RRC, MIB, SIB, RAR (random access response) , TCI state, data, arrival of date, paging, RRC establishment message, RRC reconfiguration message, handover command. In some examples, handover can be one or more of: RRC based handover, Conditional handover, Dual Active Protocol Stack (DAPS) handover or Layer 1 or Layer 2 based handover.
[0047] Configuration information examples
[0048] In some examples, configuration information can be provided or configured by at least one of: RRC (radio resource control) , MAC CE, DCI, pre-configuration, default or RAR (random access response) .
[0049] In some examples, MAC CE can be at least one of: LTM cell switch command MAC CE, MAC CE for activating / deactivating / updating / triggering RS / cell / CSI reporting configuration, MAC CE for TCI (transmission control indicator) state activation / deactivation, a specific MAC CE. In the present document, various operations separated by a forward slash ( “ / ” ) mean that these options are alternatives or may occur together.
[0050] In some examples, DCI can be at least one of: DCI scheduling / triggering a UL or DL channel / signal transmission, a DCI carrying TCI state, a specific DCI.
[0051] In some examples, RAR can be at least one of: fallback RAR, similar fallback RAR, success RAR, similar success RAR, RAR UL grant, a specific RAR.
[0052] In some examples, at least one of the following configuration information can be provided or configured:
[0053] - One or more RS resource configurations;
[0054] - One or more RS resource set configurations;
[0055] - One or more RS resources;
[0056] - One or more RS resource sets;
[0057] - One or more CSI reporting configurations;
[0058] - One or more cell configurations;
[0059] - One or more list of cells;
[0060] - One or more UL resource configurations;
[0061] - One or more PUCCH resource configurations;
[0062] - Periodicity of PUCCH resource;
[0063] - One or more PUSCH resource configurations;
[0064] - One or more Offsets on RS transmission;
[0065] - One or more offsets on CSI reporting;
[0066] - One or more offsets on PUSCH transmission;
[0067] - A list of TCI states;
[0068] - RACH configuration;
[0069] - Usage;
[0070] - One or more trigger states;
[0071] - One or more list of trigger states;
[0072] - Mode of CSI acquisition;
[0073] In some examples, usage is used to indicate at least one of: L1 / L2 triggered mobility, CSI acquisition, early or rapid or late CSI acquisition, beam management, tracking reference signal (TRS) tracking, handover, or other usages.
[0074] In some examples, mode of CSI acquisition can be at least one of: early or rapid CSI acquisition, early or rapid RS measurement, early or rapid CSI reporting, late CSI acquisition, late CSI reporting, whether to enable CSI acquisition or early CSI acquisition or early RS measurement or early CSI reporting.
[0075] In some examples, trigger state can be used for at least one of semi-persistent trigger state, aperiodic trigger state.
[0076] In some examples, a trigger state or an indication includes or is associated with at least one of one or more CSI reporting configurations, or, one or more RS resource configurations, or, one or more RS resources, or one or more RS resource sets.
[0077] In some examples, at least one of one or more CSI reporting configurations, or, one or more RS resource configurations, or, one or more RS resources, or one or more RS resource sets are associated with one or more cell indexes.
[0078] In some examples, one or more CSI reporting configurations are associated with one or more RS resource configurations, or one or more RS resources, or one or more RS resource sets.
[0079] In some examples, one or more RS resource sets or RS resources are configured or associated with one or more cells; In some examples, RS resource within one RS resource set is associated with cell index within a list of cells. In some examples, one or more RS resources or sets from one or more RS resources or sets is associated with a cell index; In some examples, one or more RS resources or sets from one or more RS resources or sets is associated with a cell from a list of cells; In some examples, one or more RS resources from one RS resource set is associated with a cell index; In some examples, one or more RS resources from one RS resource set is associated with a cell from a list of cells.
[0080] In some examples, RS can be at least one of: Synchronization Signal / physical broadcast channel PBCH (SSB) , Channel State Information Reference Signal (CSI-RS) , Demodulation Reference Signal (DMRS) , Tracking Reference Signal (TRS) , Phase tracking reference signals (PT-RS) , Sounding Reference Signal (SRS) .
[0081] In some examples, UL resource can be one or more of: UL resource mapped or associated with RS or RS derived by TCI state, UL resource to transmit CSI reporting or RS, or, dedicated UL resource, or, UL resource to transmit UL channel / signal, or, UL resource to transmit data or PUSCH of MSG A or MSG 1 or MSG 3 or MSG B or scheduling request (SR) or buffer status report (BSR) , or, UL resource to transmit the completion of handover or switching, or a specific UL resource, or, PUCCH, or, PUSCH, or, dynamic grant PUSCH, or, configured grant PUSCH.
[0082] In various embodiments, a cell can be replaced with at least one of serving cell, candidate cell, non-serving cell, neighbor cell, additional cells, virtual cell, super cell, bandwidth part (BWP) , carrier, band, or frequency.
[0083] In some examples, CSI acquisition is configured or triggered for one or more cells. In some examples, at least one of RS measurement for CSI acquisition, CSI reporting for acquisition are configured or triggered for one or more cells.
[0084] In some examples, a signaling can be used to select or update or activate or deactivate or indicated one or more of: a subset of cells; a subset of cells from the configured set of cells; a subset of RS resources or sets; a subset of RS resources or sets from the configured set of RS resources or sets; a subset of RS resources or sets from the configured set of RS resources or sets for one or more cells; a subset of RS resources or sets from the configured set of RS resources or sets for one or more selected cells; a subset of CSI reporting configurations; a subset of CSI reporting configurations from the configured set of CSI reporting configurations; a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more cells; a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more selected cells; a subset of TCI states; a subset of TCI states from the configured set of TCI states; a subset of TCI states from the configured set of TCI states for one or more cells; a subset of TCI states from the configured set of TCI states for one or more selected cells; a subset of trigger states; a subset of trigger states from the configured set of trigger states; a subset of trigger states from the configured set of trigger states for one or more cells; a subset of trigger states from the configured set of trigger states for one or more selected cells. In some examples, the signaling can be one or more of: DCI, MAC CE, or RRC. In some examples, whether to perform selection or update or activation or deactivation of the above information is up to UE capability or depends on NW configuration.
[0085] In some examples, CSI acquisition is achieved or triggered or enabled by one or two or multiple step or X level signaling. In some examples, CSI acquisition includes at least one of: RS measurement for CSI acquisition, CSI reporting for acquisition.
[0086] RS measurement
[0087] In some examples, the time domain behavior of RS transmission can be periodic, aperiodic, or semi-persistent.
[0088] In some examples, regarding RS measurement for CSI acquisition, at least one of the following can be considered:
[0089] - Signaling to trigger or activate or deactivate or update RS resource or RS resource set or RS transmission or measurement;
[0090] - Timeline to transmit or measure or determine RS;
[0091] - Validation or availability of RS resource;
[0092] - The number of valid RS resources;
[0093] - How to determine RS for CSI acquisition from TCI state;
[0094] - UE capability;
[0095] - Signaling for coordination between source point and candidate / target point on RS transmission
[0096] In some examples, RS associated with the first cell is triggered or activated or deactivated by the second cell. In some examples, a signaling for interaction or coordination between the first cell and the second cell on RS transmission or stopping RS transmission or deactivating RS is introduced. In some examples, the second cell sends a first message to the first cell. In some examples, the message can be seen as a request information on RS transmission or stopping RS transmission or deactivating RS is introduced. In some examples, the first cell sends a second message to the second cell. In some examples, the second message can be a response information. In some examples, the second cell sends a message to inform the first cell on RS transmission or stopping RS transmission or deactivating RS is introduced or a RS has been triggered or activated or deactivated. In some examples, the first cell and the second cell can be the same or different DU, or CU.
[0097] CSI reporting
[0098] In some examples, the time domain behavior of CSI reporting can be periodic, aperiodic, or semi-persistent. In some examples, regarding CSI reporting for CSI acquisition, at least one of the following can be considered:
[0099] - Signaling to trigger or indicate CSI reporting or CSI transmission;
[0100] - Timeline to transmit CSI reporting;
[0101] - UL resource to transmit CSI reporting;
[0102] - Timeline to UL resource carrying CSI reporting;
[0103] - Timeline or requirement between reference resource and CSI reporting;
[0104] - UE capability.
[0105] In some examples, CSI reporting can be transmitted to serving cell or target cell or non-serving cell or candidate cell or neighbor cell. In some examples, CSI reporting corresponding to candidate cell can be transmitted to serving cell or target cell or non-serving cell or candidate cell or neighbor cell. In some examples, CSI reporting corresponding to candidate cell will be transferred from serving cell to corresponding candidate cell.
[0106] In some examples, CSI acquisition is triggered by a field in a signaling. In some examples, a field can be CSI request field or information element. In some examples, the signaling can be at least one of:MAC CE, LTM cell switch command MAC CE, DCI, RRC, MIB, SIB, RAR, TCI state, data, arrival of date, paging, RRC establishment message, RRC reconfiguration message, handover command. In some examples, handover can be one or more of: RRC based handover, Conditional handover, Dual Active Protocol Stack (DAPS) handover or Layer 1 or Layer 2 based handover.
[0107] More details can be found in the following one or more embodiments.
[0108] Embodiment 2
[0109] When and / or how to trigger or enable CSI acquisition
[0110] In some examples, at least one of CSI acquisition or RS measurement or CSI reporting can be started or performed for at least one of the following: idle state, inactivate state, connected state, after handover command is transmitted, before completion of handover, before reception of handover command, or after reception of handover command and before completion of handover, initial access.
[0111] In some examples, regarding CSI acquisition, at least one of the following can be considered (Alt stands for alternative) :
[0112] · Alt-1: CSI reporting is performed before reception of a signaling or information;
[0113] · Alt-2: RS measurement and CSI reporting corresponding to RS measurement are performed before reception of a signaling or information;
[0114] · Alt-3: CSI reporting is performed after reception of a signaling or information;
[0115] · Alt-4: RS measurement is performed before reception of a signaling, and CSI reporting corresponding to RS measurement is performed after reception of the signaling or information;
[0116] · Alt-5: RS measurement and CSI reporting corresponding to RS measurement are performed after reception of a signaling or information.
[0117] In some examples, which one or more alternatives mentioned above or whether early CSI acquisition or early RS measurement or early CSI reporting are supported or enabled or configured or indicated based on at least one of: RRC configuration, MAC CE signaling, DCI signaling, default, NW configuration, or UE capability. In some examples, if any of alternative mentioned above is not configured or enabled or indicated, a default alternative is defined. In some examples, the default alternative can be one of the alternatives mentioned above.
[0118] In some examples, regarding how to trigger or enable CSI acquisition, at least one of the following can be considered:
[0119] · Alt-1: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on RRC signaling;
[0120] · Alt-2: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on MAC CE signaling;
[0121] · Alt-3: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on DCI signaling;
[0122] · Alt-4: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on TCI state.
[0123] · Alt-5: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on random access procedure or early TA acquisition mechanism, or RAR or RAR UL grant, or MSG A or MSG B.
[0124] · Alt-6: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on L1 event-triggered reporting.
[0125] · Alt-7: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on L1 or L3 RSRP (reference signal received power) measurement result.
[0126] · Alt-8: CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on arrival of data or information or UE’s state.
[0127] In some examples, CSI acquisition or RS measurement or CSI reporting is triggered or enabled based on RRC or CSI acquisition related configuration or RACH configuration. In some examples, CSI acquisition related configuration or RACH configuration is provided by at least one of RRC, MAC CE or DCI. In some examples, RRC message can be at least one of: RRC Reconfiguration, RRC Reconfiguration Complete, Reconfiguration with sync, RRC connected, RRC inactive, RRC idle, MIB, SIB, Paging.
[0128] In some examples, the MAC CE can be at least one of: a MAC CE to trigger or update or activate or deactivate RS resource or set or transmission or measurement, a MAC CE to schedule or trigger a UL / DL channel / signal transmission, a MAC CE to activate or deactivate CSI reporting configuration, a MAC CE to activate or deactivate TCI state, a MAC CE to trigger handover or switching, a MAC CE to trigger or activate or indicate CSI reporting, a MAC CE to carry CSI request, a MAC CE to activate or indicate TCI state, a MAC CE to trigger an random access procedure, a MAC CE to carry UL resource information, or a MAC CE to carry offset to transmit or measure RS, or CSI reporting, a MAC CE to carry an indication on whether to trigger CSI acquisition or RS measurement or CSI reporting or CSI request, or a specific MAC CE, or MAC CE to carry event-triggered reporting.
[0129] In some examples, the DCI can be at least one of: DCI to schedule or trigger a UL / DL channel / signal transmission, DCI to carry CSI request, DCI to trigger a random access procedure or PRACH transmission, DCI to indicate or carry TCI state indication, DCI to activate or deactivate or indicate CSI reporting configuration, DCI to activate or deactivate or indicate trigger state, DCI to carry UL resource information, DCI to carry offset to transmit or measure RS, or CSI reporting, DCI to carry an indication on whether to trigger CSI acquisition or RS measurement or CSI reporting or CSI request, or a specific DCI.
[0130] In some examples, TCI state can be at least one of: activated TCI state, indicated TCI state, or configured TCI state.
[0131] In some examples, early timing advance (TA) acquisition mechanism includes at least one of physical downlink control channel PDCCH order based RACH (random access channel) procedure, PDCCH order based RACH procedure without RAR, PDCCH order based RACH procedure with RAR, UE based TA measurement, MAC CE based RACH procedure. In some examples, RAR or RAR UL grant or MSG A, or MSG B includes at least one of CSI request field, CSI reporting configuration field, trigger state field, the time or frequency domain resource, or offset.
[0132] In some examples, L1 event-triggered reporting is transmitted if L1 event is met.
[0133] In some examples, CSI acquisition or RS measurement or CSI reporting is triggered per cell, or across cells. In some examples, on which cell (s) for CSI acquisition can be configured or selected by at least one of MAC CE or DCI or UE capability.
[0134] In some examples, CSI reporting can be transmitted by UCI or MAC CE. In some examples, UCI can be at least one of: PUCCH, PUSCH, CG-PUSCH, DG-PUSCH. In some examples, CSI reporting can be multiplexed with channel or signal or information. In some examples, channel or signal or information can be at least one of: SR, BSR, hybrid automatic repeat request HARQ-ACK / NACK, CSI. In some examples, CSI can be used for some cases, e.g., NW controlled reporting, UE controlled reporting, mobility, idle state, inactive state, connected state.
[0135] Embodiment 3
[0136] Signaling to enable or trigger or update CSI reporting
[0137] In some examples, CSI reporting is enabled or triggered or updated by a signaling or information. In some examples, the signaling or information can be at least one of: RRC, MAC CE, DCI, RAR or RAR UL grant.
[0138] Periodic CSI reporting
[0139] In some examples, CSI reporting can be transmitted on UL resource or transmission occasion. In some examples, UL resource or transmission occasion, or valid UL resource or transmission occasion is periodic. In some examples, UL resource or transmission occasion, or valid UL resource or transmission occasion is configured by RRC or pre-define or default. In some examples, UL resource or transmission occasion, or valid UL resource or transmission occasion can be PUCCH, or PUSCH. In some examples, CSI reporting is carried on at least one of: UCI, or MAC CE.
[0140] In some examples, CSI reporting is transmitted or CSI reporting is transmitted on UL resource or transmission occasion, or valid UL resource or transmission occasion. In some examples, CSI reporting configuration is configured by a signaling. In some examples, the signaling can be at least one of RRC or MAC CE. In some examples, the MAC CE can be replaced with L1 / L2 triggered mobility cell switch command MAC CE. In some examples, CSI reporting configuration can be obtained by target cell configuration field included in a MAC CE. In some examples, RRC is received before reception of a MAC CE. In some examples, CSI reporting configuration from RRC configuration and MAC CE can be same or different.
[0141] In some examples, CSI reporting can be transmitted on or starting from the first UL resource or transmission occasion, or the first valid UL resource or transmission occasion or PUSCH carrying MSG 3or CG-PUSCH or DG-PUSCH or PUCCH. In some examples, CSI reporting can be transmitted on or starting from the first UL resource or transmission occasion, or the first valid UL resource or transmission occasion or PUSCH carrying MSG 3 or PUSCH carrying MSG 3or CG-PUSCH or DG-PUSCH or PUCCH after reception of MAC CE signaling.
[0142] Aperiodic or semi-persistent CSI reporting
[0143] In some examples, semi-persistent CSI reporting is activated or deactivated or triggered or enabled or updated by a signaling.
[0144] In some examples, aperiodic CSI reporting is triggered or enabled or updated by a signaling.
[0145] In some examples, the signaling can be at least one of: MAC CE, DCI, PDCCH order, MSG A, RAR, or RAR UL grant.
[0146] In some examples, MAC CE can be LTM cell switch command MAC CE. In some examples, MAC CE or DCI, RAR, or RAR UL grant is received before or after LTM cell switch command MAC CE.
[0147] In some examples, at least one of the following information can be included or carried in MAC CE, DCI, RAR, or RAR UL grant or MSG B:
[0148] · CSI request field;
[0149] · CSI reporting configuration field;
[0150] · Usage field;
[0151] · Offset field;
[0152] · UL resource field;
[0153] In some examples, offset field indicates one or more offsets. In some examples, offset is used to determine RS transmission and / or CSI reporting. In some examples, offset is an offset value relative to the start or end of MAC CE, DCI, RAR, or RAR UL grant. In some examples, a list of offsets is configured or provided by RRC. In some examples, offset can be interval between resources or transmissions.
[0154] In some examples, UL resource field is used to indicate one or more UL resources or the time or frequency domain resource or allocation of a signal / channel, or the position of the first UL resource.
[0155] In some examples, CSI request field is used to one or more of trigger, activate, deactivate, indicate or update or enable or request at least one of the following:
[0156] · No CSI reporting;
[0157] · a CSI reporting to be transmitted;
[0158] · one or more trigger states;
[0159] · a CSI reporting configuration;
[0160] · whether a CSI reporting is transmitted;
[0161] · whether a CSI reporting is transmitted with another signal / channel / message;
[0162] · a CSI reporting to be transmitted with another signal or channel or message;
[0163] · a CSI reporting not to be transmitted with another signal or channel or message.
[0164] In some examples, the length of the CSI request field or CSI reporting configuration field is X bits. In some examples, X can be an integer larger than or equal to 1 or 0. In some examples, X can be one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, or any combination of values above.
[0165] In some examples, specific trigger state can be at least one of: first or smallest or largest trigger state index, second or second smallest or second largest trigger state index, third or third smallest or third largest trigger state index, ..., or last or largest or smallest trigger state index.
[0166] In some examples, CSI reporting configuration corresponding to the CSI reporting can be obtained or provided by a signaling. In some examples, the signaling can be at least one of RRC or MAC CE.In some examples, the MAC CE can be replaced with L1 / L2 triggered mobility cell switch command MAC CE. In some examples, CSI reporting configuration can be obtained by target or serving cell configuration field included in a MAC CE.
[0167] In some examples, RRC can be received before reception of a MAC CE.
[0168] In some examples, CSI reporting configuration from RRC configuration and MAC CE can be same or different.
[0169] In some examples, CSI reporting configuration field is used to at least one of the following:
[0170] · Request or trigger or enable a CSI reporting;
[0171] · Trigger or activate or deactivate or update or indicate one or more CSI reporting configurations;
[0172] · Request or trigger or enable a CSI reporting, and / or trigger or activate or deactivate or update or indicate one or more CSI reporting configurations;
[0173] · Trigger or activate or deactivate or update, and / or indicate one or more CSI reporting configurations;
[0174] In some examples, a codepoint of CSI request field in MAC CE, DCI, RAR, or RAR UL grant is mapped to a trigger state or a CSI reporting configuration. In some examples, one or more trigger state list or CSI reporting configuration are provided by RRC, or MAC CE. In some examples, a trigger state mapped to codepoint of CSI request is provided from a second set of trigger states. In some examples, trigger state from the second set of trigger states is selected or updated from a first set of trigger states. In some examples, the first set of trigger states is configured or provided by RRC or pre-configuration or MAC CE.
[0175] In some examples, usage field is used to indicate at least one of: whether to configure L1 / L2 triggered mobility, or enable or trigger CSI acquisition or RS measurement or transmission or CSI reporting, or request or trigger or enable a or RS measurement or transmission or CSI reporting, or other cases.
[0176] In some examples, bitmap can be used to determine which one or more CSI reporting configurations or trigger states to be selected and / or indicated and / or activated and / or deactivated and / or updated.
[0177] In some examples, other signal or channel or message can be at least one of: MSG A PUSCH, MSG A data, MSG 3, MSG 1, SR, BSR, HARQ-ACK / NACK, CSI, RRC reconfiguration complete, RSRP, signal to interference and noise ratio SINR.
[0178] In some examples, for RACH-less LTM cell switch or TA has been acquired, aperiodic CSI reporting is triggered by a MAC CE or DCI. For RACH-based LTM cell switch or TA has not been acquired or a random access procedure to be initiated, aperiodic CSI reporting is triggered by RAR, RAR UL grant or fallback RAR, similar fallback RAR, success RAR, similar success RAR, RAR UL grant, a specific RAR.
[0179] In some examples, which one will be used to trigger CSI reporting depends on NW configuration or UE capability.
[0180] Embodiment 4
[0181] UL resource to transmit CSI reporting
[0182] In some examples, UL resource can be scheduled or allocated or indicated by serving cell or first cell or target cell or second cell or candidate cell or RRC or DCI or MAC CE. In some examples, UL resource is from serving cell or target cell or candidate cell or first cell or second cell. In some examples, if UL resource from target cell is scheduled or allocated or indicated by serving cell or first cell, serving cell or first cell will inform target cell or second cell on UL resource to carry CSI reporting. In some examples, before UL resource from target cell or second cell is scheduled or allocated or indicated by serving cell or first cell, serving cell or first cell can send a request information on UL resource to carry CSI reporting to target cell or second cell. In some examples, target cell or second cell can send a response information on UL resource to carry CSI reporting to serving cell or first cell.
[0183] In some examples, container to carry CSI reporting can be at least one of UCI, MAC CE, MSG A PUSCH or MSG 3 PUSCH.
[0184] In some examples, UCI can be carried on at least one of PUCCH or PUSCH. In some examples, PUSCH can be at least one of dynamic grant PUSCH, configured grant PUSCH. In some examples, UCI includes at least one of HARQ-ACK, CSI, SR or BSR. In some examples, PUSCH or PUCCH can be a dedicated PUSCH or PUCCH.
[0185] In some examples, UL resource to transmit CSI reporting can be at least one of:
[0186] · Alt-1: Configured grant PUSCH;
[0187] · Alt-2: Dynamic grant PUSCH;
[0188] · Alt-3: PUCCH;
[0189] · Alt-4: UL resource to transmit the first UL channel / signal;
[0190] · Alt-5: UL resource to carry HO or switching completion information or RRC reconfiguration complete.
[0191] · Alt-6: UL resource to transmit data transmission in MSG A;
[0192] · Alt-7: UL resource to transmit MSG 3.
[0193] In some examples, CG-PUSCH resource or PUCCH resource or DG-PUSCH or PUSCH can be provided by a signaling. In some example, the signaling can be at least one of RRC or MAC CE or DCI or RAR or RAR UL grant. In some examples, the MAC CE can be replaced with L1 / L2 triggered mobility cell switch command MAC CE. In some examples, CG-PUSCH resource or PUCCH resource or DG-PUSCH or PUSCH can be obtained by target or serving cell configuration field included in a MAC CE.In some examples, RRC is received before reception of a MAC CE. In some examples, CG-PUSCH resource or PUCCH resource or DG-PUSCH or PUSCH configuration from RRC configuration and MAC CE can be same or different.
[0194] In some examples, for RACH-less LTM cell switch or TA has been acquired, UL resource to carry CSI reporting is provided or determined by a MAC CE or DCI or UL resource to carry CSI reporting can be UL resource to carry RRC reconfiguration complete. In some examples, for RACH-based LTM cell switch or TA has not been acquired or a random access procedure to be initiated, UL resource to carry CSI reporting is provided or determined by RAR, RAR UL grant or fallback RAR, similar fallback RAR, success RAR, similar success RAR, RAR UL grant, a specific RAR or MSG A or MSG 3.
[0195] In some examples, which one or UL resource will be used to carry CSI reporting depends on NW configuration or UE capability.
[0196] In some examples, the time and / or frequency domain allocation for PUSCH transmission can be included or indicated by at least one of MAC CE or DCI or RAR or RAR UL grant or RRC or MSG A or MSG A PUSCH or MSG 3. In some examples, the MAC CE can be replaced with L1 / L2 triggered mobility cell switch command MAC CE.
[0197] In some examples, the DCI can be at least one of: DCI to schedule or trigger a UL / DL channel / signal transmission, DCI to carry CSI request, DCI to trigger a random access procedure or PRACH transmission, DCI to indicate or carry TCI state indication, DCI to activate or deactivate or indicate CSI reporting configuration, DCI to activate or deactivate or indicate trigger state or RS transmission, or a specific DCI.
[0198] In some examples, CSI reporting is transmitted or multiplexed with at least one of: first UL channel / signal, HO or switching completion information or RRC reconfiguration complete, Msg A, data transmission in MAG A, or MSG 3 or event-triggered measurement result or measurement result or CSI or SR or BSR or HARQ-ACK / NACK or RSRP or SINR. In some examples, CSI reporting is transmitted or multiplexed with at least one of: first UL channel / signal, HO or switching completion information, Msg A, data transmission in MAG A, or MSG 3 on one or more same or partial overlapped resources.
[0199] Validation or availability of resource to carry or transmit CSI reporting
[0200] In some examples, resource to carry or transmit CSI reporting is valid or available. In some examples, resource to carry or transmit CSI reporting is validated starting from a first point or a first point that is after the first position.
[0201] In some examples, the first position can be a position where at least one of: the MAC CE or DCI signaling is received, a channel / signal with acknowledgment information corresponding to a channel / signal carrying MAC CE or DCI signaling is transmitted or received, or the position is determined based on a position where a channel / signal with acknowledgment information corresponding to a channel / signal carrying MAC CE or DCI signaling is transmitted or received plus an offset, or application time of the indicated TCI state in MAC CE, or MAC CE to trigger CSI reporting takes effect or RRC configuration information is parsed and / or complected.
[0202] In some examples, the unit of the offset or the first point can be at least one of slot, symbol, subframe, frame, any combination of above. In some examples, the value of offset or first point can be an integer larger than or equal to 1 or 0, or, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, any combination of above.
[0203] Embodiment 5
[0204] Timeline to transmit CSI reporting
[0205] In some examples, the timeline to CSI reporting can be determined by at least one of the following:
[0206] · An offset relative to a reference point;
[0207] · The timeline to transmit the first UL channel / signal transmission;
[0208] · PUSCH or DG-PUSCH or CG-PUSCH or PUCCH for transmitting UL channel / signal or first UL channel or signal;
[0209] · The timeline to carry or transmit HO or switching completion information or RRC reconfiguration complete;
[0210] · The timeline to transmit PUSCH in MSG A;
[0211] · The timeline to transmit MSG 3.
[0212] · The timeline to transmit SRS.
[0213] In some examples, the reference point can be at least one of: a signaling to trigger or indicate or activate or update CSI reporting or CSI reporting configuration or trigger state or RS measurement or transmission, a signaling to schedule or trigger or indicate or activate or update UL / DL channel / signal transmission, a signaling to indicate or activate TCI state, the time where a signaling takes effect, the time where a UL transmission carrying a acknowledge information corresponding to a signaling, or the time where a UL transmission carrying a acknowledge information corresponding to a signaling plus an offset, or the time where a signaling takes effect plus an offset, RS resource to transmit or measure, RO in MSG A, RAR, RACH occasion, or MSG 2.
[0214] In some examples, the offset is indicated or provided by a signaling. In some examples, the signaling can be at least one of DCI, MAC CE, RRC. In some examples, RRC can configure or indicate one or more offsets or one or more list of offsets. In some examples, one offset is indicated or determined by at least one of DCI or MAC CE or default. In some examples, offset depends on UE capability.
[0215] In some examples, SSB or CSI-RS or quasi-colocation QCL RS in TCI state or SSB associated with QCL RS in TCI state or RS resource or state space representation SSR or CSI-RS associated with RO is associated with or mapped with UL resource or PUCCH or CG-PUSCH or PUSCH or DG-PUSCH.
[0216] In some examples, one or more PUSCH resources are mapped with one or more receiving opportunities ROs or preambles. In some examples, PUSCH resource is determined based on an offset relative to the start or end of resource to transmit preamble.
[0217] In some examples, resource to transmit MSG 3 is determined based on the time domain location of PUSCH or PUCCH in RAR or RAR UL grant. In some examples, the timeline to transmit MSG 3 is a gap or an offset between a signaling triggering or indicating MSG 3 transmission and MSG 3 transmission.
[0218] In some examples, SRS is triggered or indicated or transmitted by at least one of RRC, MAC CE or DCI. In some examples, the timeline to transmit SRS is a gap or an offset between a signaling triggering or indicating SRS and SRS transmission.
[0219] In some examples, UL resource to transmit HO or switching completion information or RRC reconfiguration complete is provided by at least DCI or RRC. In some examples, the UL resource can be PUCCH or DG-PUSCH or CG-PUSCH.
[0220] Embodiment 6
[0221] In some examples, one or more RS resource configurations or RS resources or RS resource sets are associated with one or more CSI reporting configuration.
[0222] In some examples, the time domain of RS transmission can be periodic, aperiodic, semi-persistent.
[0223] In some examples, RS measurement is used for CSI acquisition or other purposes.
[0224] Periodic RS measurement or transmission
[0225] In some examples, RS can be measured before reception of a signaling. In some examples, RS can continue to be measured after reception of the signaling.
[0226] In some examples, RS measurement is performed on one or more RS resources or RS transmission is transmitted. In some examples, RS resource, or valid RS resource is periodic.
[0227] In some examples, if RS resource or set or measurement configuration is configured or provided by a signaling, RS measurement will be performed or RS transmission will be transmitted on RS resource, or valid RS resource. In some examples, the signaling can be at least one of RRC or MAC CE. In some examples, the MAC CE can be replaced with L1 / L2 triggered mobility cell switch command MAC CE. In some examples, RS resource or set or measurement configuration can be obtained by target or serving cell configuration field included in a MAC CE. In some examples, RRC is received before reception of a MAC CE. In some examples, RS resource or set or measurement configuration from RRC configuration and MAC CE can be same or different.
[0228] In some examples, RS measurement can be performed or RS transmission can be transmitted on or starting from the first RS resource, or the first valid RS resource. In some examples, RS measurement can be performed or RS transmission can be transmitted on or starting from the first RS resource, or the first valid RS resource after reception of a signaling.
[0229] Aperiodic / Semi-persistent RS measurement or transmission
[0230] In some examples, a signaling is used to activate or deactivate or update one or more SP CSI-RS resources or resource sets. In some examples, a signaling can be used to activate or deactivate or update one or more SP CSI-RS resources or resource sets for one or more cells. In some examples, a signaling can be used to activate or deactivate or update K1 SP CSI-RS resource or resource set per cell within L1 cells. In some examples, different signaling is used to activate or deactivate or update one or more SP CSI-RS resources or resource sets from different cells.
[0231] In some examples, CSI-RS resource (s) or resource set (s) or configuration ID (s) for a candidate cell is / are same as that of serving cell. In some examples, if CSI-RS resource (s) or resource set (s) or configuration ID (s) for a candidate cell is / are activated or deactivated, the same CSI-RS resource (s) or resource set (s) or configuration ID (s) for a serving cell is / are activated or deactivated. In some examples, such method is beneficial to reduce signaling overhead for activating or deactivating CSI-RS resource (s) or resource set (s) or configuration ID (s) for a serving cell.
[0232] In some examples, after reception of a signaling, activated SP CSI-RS resource (s) or resource set (s) is / are deactivated or updated. In some examples, after reception of a signaling, activated SP CSI-RS resource (s) or resource set (s) that is / are not associated with one or more specific cells is / are deactivated or updated. In some examples, the specific cell can be a target cell, or a serving cell, or a candidate cell, or a cell that is used for subsequent cell switching (see e.g., the second or third communication device disclosed herein) .
[0233] In some examples, activated SP CSI-RS resource (s) or resource set (s) is / are deactivated or updated by a signaling. In some examples, activated SP CSI-RS resource (s) or resource set (s) is / are deactivated or updated until a signaling for SP CSI-RS resource or resource set activation or deactivation or update is received or takes effect. In some examples, after reception of a first signaling, activated SP CSI-RS resource (s) or resource set (s) is / are deactivated or updated until a second signaling for SP CSI-RS resource or resource set activation or deactivation or update is received or takes effect.
[0234] In some examples, the signaling or the first signaling or the second signaling can be at least one of: LTM Cell Switch Command MAC CE, MAC CE for SP resource or resource set activation or deactivation or update, DCI, or RRC reconfiguration message.
[0235] In some examples, AP / SP CSI-RS transmission is triggered or activated or updated by a signaling or TCI state or PDCCH order to trigger random access procedure or MSG 1 or MSG A or preamble in MSG A, In some examples, the signaling can be at least one of RRC, MAC CE, DCI.
[0236] In some examples, SSB or CSI-RS or QCL RS in TCI state or SSB associated with QCL RS in TCI state or RS used for random access procedure is same as or associated with RS for CSI acquisition.
[0237] In some examples, at least one of the following information can be included or carried in MAC CE, DCI, RAR, or RAR UL grant or MSG B:
[0238] · CSI request field;
[0239] · RS resource or set or measurement configuration field;
[0240] · Usage field;
[0241] · Offset field;
[0242] · UL resource field;
[0243] In some examples, offset field indicates one or more offsets. In some examples, offset is used to determine RS transmission and / or CSI reporting. In some examples, offset is an offset value relative to the start or end of MAC CE, DCI, RAR, or RAR UL grant or MSG B. In some examples, a list of offsets is configured or provided by RRC. In some examples, offset can be interval between resources or transmissions.
[0244] In some examples, CSI request field is used at least one of the following:
[0245] · No CSI reporting;
[0246] · a CSI reporting to be transmitted;
[0247] · one or more trigger states;
[0248] · a CSI reporting configuration;
[0249] · whether a CSI reporting is transmitted;
[0250] · whether a CSI reporting is transmitted with another signal / channel / message;
[0251] · a CSI reporting to be transmitted with another signal or channel or message;
[0252] · a CSI reporting not to be transmitted with another signal or channel or message.
[0253] In some examples, CSI request field is used to one or more of trigger, activate, deactivate, indicate or update or enable or request at least one of the following:
[0254] · No CSI reporting;
[0255] · a CSI reporting;
[0256] · a RS transmission;
[0257] · one or more trigger states;
[0258] · a CSI reporting to be transmitted;
[0259] · a CSI reporting configuration;
[0260] · a RS resource or set;
[0261] · whether a CSI reporting is transmitted;
[0262] · whether a RS is transmitted or measured;
[0263] · whether a CSI reporting is transmitted with another signal / channel / message;
[0264] · Whether a RS is transmitted with another signal / channel / message;
[0265] · a CSI reporting to be transmitted with another signal or channel or message;
[0266] · a RS to be transmitted with another signal or channel or message;
[0267] · a CSI reporting not to be transmitted with another signal or channel or message.
[0268] · a RS not to be transmitted with another signal or channel or message
[0269] · Request or trigger a CSI reporting, and / or indicate one or more specific trigger states;
[0270] In some examples, one trigger state is configured or associated with one or more associated CSI reporting configuration information or CSI reporting configurations. In some examples, one or more CSI reporting configuration are configured or associated with one or more RS resources or RS resource sets or RS resource configuration or RS resource set configuration.
[0271] In some examples, RS resource or set or measurement configuration field is used to at least one of the following:
[0272] · Request or trigger or enable or indicate a RS transmission or measurement or resource or set;
[0273] · Trigger or activate or deactivate or update or indicate one or more RS transmission or measurement or resource or set configurations;
[0274] · Request or trigger or enable or indicate a RS transmission or measurement or resource or set, and / or trigger or activate or deactivate or update or indicate one or more RS transmission or measurement or resource or set configurations;
[0275] · Trigger or activate or deactivate or update, and / or indicate one or more RS transmission or measurement or resource or set configurations or one or more RS transmissions or measurements or resources or sets;
[0276] Timeline to transmit or measure RS
[0277] In some examples, the timeline to RS transmission or measurement can be determined by at least one of the following:
[0278] · An offset relative to a reference point;
[0279] · The time where activated TCI state takes effect;
[0280] · Application time of indicated TCI state;
[0281] In some examples, the reference point can be at least one of: a signaling to trigger or indicate or activate or update RS transmission or measurement or RS resource configuration or CSI request, or trigger state or handover or switching or RACH procedure, a signaling to schedule or trigger or indicate or activate or update UL / DL channel / signal transmission, a signaling to indicate or activate TCI state, the time where a signaling takes effect, the time where a UL transmission carrying a acknowledge information corresponding to a signaling, or the time where a UL transmission carrying a acknowledge information corresponding to a signaling plus an offset, or the time where a signaling takes effect plus an offset, MSG 1 / 2 / 3 / 4, MSG A / B, MSG A Preamble, or MSG A PUSCH, MAC CE, DCI.
[0282] In some examples, offset field indicates one or more offsets. In some examples, offset is used to determine RS transmission and / or CSI reporting. In some examples, offset is an offset value relative to the start or end of the reference point. In some examples, a list of offsets is configured or provided by RRC. In some examples, offset can be interval between resources or transmissions.
[0283] In some examples, MAC CE is used to activate or deactivate or update or selected on one or more TCI states. In some examples, RS transmission or measurement is transmitted or performed on or starting from the first RS resource after MAC CE for activation / deactivation TCI state takes effect.
[0284] In some examples, MAC CE or DCI can be used to indicate one or more TCI states. In some examples, RS transmission or measurement is transmitted or performed starting from the first RS resource after MAC CE or DCI to indicate one or more TCI states takes effect.
[0285] Validation or availability of resource to measure or transmit RS
[0286] In some examples, resource to measure or transmit RS is valid or available. In some examples, resource to measure or transmit RS is validated starting from a first point or a first point that is after the first position. In some examples, the first point or first position can be determined using similar method as validation or availability of resource to CSI reporting.
[0287] In some examples, CSI-RS measurement is performed no later than a reference point. In some examples, the reference point is determined based on slot n-x. in some examples, CSI reporting is transmitted on slot n. In some examples, X can be configurable or fixed value or based on application time of the indicated TCI state in MAC CE, or the time where MAC CE to trigger RS transmission takes effect or the time where RRC configuration information is parsed and / or complected.
[0288] In some examples, transmission or measurement occasion of RS resource associated with the CSI reporting is no later than CSI reference resource.
[0289] Embodiment 7
[0290] Restriction on the number of active CSI-RS resources / ports for one or more cells
[0291] In some examples, in any slot, UE is not expected to have more active CSI-RS ports or active CSI-RS resources than reported as UE capability.
[0292] In some examples, at least one of the following UE capability can be considered:
[0293] · Max #simultaneous active candidate cells (including serving cell) ;
[0294] · Max #simultaneous active non-zero power NZP-CSI-RS resources per candidate cell;
[0295] · Max #simultaneous active NZP-CSI-RS resources per serving cell;
[0296] · Max #simultaneous active NZP-CSI-RS resources across candidate cells;
[0297] · Max #simultaneous active NZP-CSI-RS resources across candidate cells and serving cell;
[0298] · Max total #of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per candidate cell;
[0299] · Max total #of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per serving cell;
[0300] · Max total #of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells;
[0301] · Max total #of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells and serving cell.
[0302] ○ In some examples, if one CSI-RS resource from the CSI-RS resource set is referred N times by one or more LTM CSI reporting setting, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times.
[0303] In some examples, if one of Xi CSI-RS resource from i-th resource set for candidate cell is referred N times by one or more LTM CSI reporting setting, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times.
[0304] Embodiment 8
[0305] CSI reference resource definition
[0306] In some examples, CSI reference resource is determined based on n-ncsi_ref. In some examples, or In some examples, μDL / μservingcell / candiatecell and μUL / μcandidate / targetcell / servingcellare the subcarrier spacing configurations for DL on candidate cell and UL on serving cell or candidate / target / serving cell and serving / candidate / target cell, or DL and UL on candidate / target / serving cell, respectively.
[0307] In some examples, the definition of valid DL slot for candidate / target cell can refer to that of serving cell. In some examples, a slot in a target / candidate / serving cell shall be considered to be a valid downlink slot if: it comprises at least one higher layer configured downlink or flexible symbol, and it does not fall within a configured measurement gap for that UE.
[0308] In some examples, CSI reporting is transmitted in slot n’ .
[0309] In some examples, nCSI_ref is smallest value greater than or equal to a threshold. In some examples, threshold can be X multiplied by or or
[0310] In some examples, nCSI_ref is such that the reference resource is in the same valid downlink slot as the corresponding CSI request.
[0311] In some examples, nCSI_ref is the smallest value greater than or equal to In some examples, slot n-nCSI_ref corresponds to a valid downlink slot, where Z' corresponds to the delay requirement.
[0312] Embodiment 9
[0313] Processing of a CSI report occupies a number of central processing units CPUs for a number of symbols
[0314] In some examples, NCPU: the number of supported simultaneous CSI calculations per candidate cell, and across candidate cells.
[0315] In some examples, a UE is not expected to be configured with an aperiodic CSI trigger state containing more than NCPU Reporting Settings.
[0316] OCPU=1 for a CSI report with LTM-CSI-ReportConfig with higher layer parameter reportQuantity set to 'cri-RSRP' , 'ssb-Index-RSRP' , 'cri-SINR' , 'ssb-Index-SINR' , 'cri-RSRP-Index' , 'ssb-Index-RSRP-Index' , 'cri-SINR-Index' , 'ssb-Index-SINR-Index ' or 'none' .
[0317] In some examples, for a CSI report with LTM-CSI-ReportConfig with higher layer parameter reportQuantity set to 'cri-RI-PMI-CQI' , 'cri-RI-CQI' ,
[0318] In some examples, In some examples, Ks is the (total) number of CSI-RS resource (s) for any candidate cell (s) in a report config. In some examples, i is the index of candidate cell. In some examples, L is the total number of candidate cell. In some examples, LTM-CSI-ResourceConfig includes a CSI-RS resource set from L candidate cells.
[0319] In some examples, In some examples, L’ is less than L. In some examples, L’ candidate cells from L candidate cells are selected by MAC CE.
[0320] In some examples, Ks’ can be set as value with less than Ks. In some examples, a subset CSI-RS resources (Ks’) is selected from Ks CSI-RS resources.
[0321] In some examples, the number of CPU is reset when LTM CSC MAC CE or MAC CE or DCI or RRC is received.
[0322] In some examples, OCPU=Ks. In some examples, Ks is the number of CSI-RS resources associated with target cell within a CSI-RS resource set, or whether Ks can be set to 1 if only one CSI-RS resource is used for measurement.
[0323] In some examples, for a CSI report with CSI-ReportConfig or LTM-CSI-ReportConfig with higher layer parameter reportQuantity not set to 'none' , the CPU (s) are occupied for a number of OFDM symbols as follows at least one of:
[0324] In some examples, P or SP CSI report occupies CPU (s) from one of the following:
[0325] Alt-1: the first symbol of the earliest CSI-RS resource associated with a candidate / target / serving cell until the last symbol of the configured PUSCH / PUCCH or UL resource carrying the report before a signaling. In some examples, the signaling can be LTM CSC MAC CE or DCI or MAC CE or RAR.
[0326] Alt-2: the first symbol of the earliest CSI-RS resource associated with a target cell after LTM CSC MAC CE or DCI or MAC CE or RAR, until the last symbol of the configured PUCCH carrying the report.
[0327] Alt-3: the first symbol after a signaling triggering the SP CSI report until the last symbol of the scheduled PUSCH carrying the report.
[0328] In some examples, AP CSI report occupies CPU (s) from the first symbol after a signaling triggering the CSI report until the last symbol of the scheduled PUSCH or UL resource carrying the report. In some examples, the signaling can be LTM CSC MAC CE or DCI or MAC CE or RAR.
[0329] Embodiment 10
[0330] Omission rule for CSI acquisition
[0331] · In some examples, Spec change (shown in bold face text) :
[0332] - Clause 5.2.3: Just to introduce a case on aperiodic CSI trigger state triggered by LTM CSC MAC CE or MAC CE.
[0333] - Note that omission rule for part 2 can be reused since CSI reporting is reported per candidate cell, as legacy, e.g., Clause 5.2.3, Clause 5.2.4.
[0334] TS 38.213-i30
[0335] · Spec change to Clause 9.2.5.2 (in bold face italics) :
[0336] 7. Implementation Examples
[0337] FIG. 2 shows an example of a wireless communication system 1300 where techniques in accordance with one or more embodiments of the present technology can be applied. A wireless communication system 1300 can include one or more base stations (BSs) 1305a, 1305b, one or more wireless devices (or UEs) 1310a, 1310b, 1310c, 1310d, and a core network 1325. A base station 1305a, 1305b can provide wireless service to terminal devices 1310a, 1310b, 1310c and 1310d in one or more wireless sectors. In some implementations, a base station 1305a, 1305b includes directional antennas to produce two or more directional beams to provide wireless coverage in different sectors. The core network 1325 can communicate with one or more base stations 1305a, 1305b. The core network 1325 provides connectivity with other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases to store information related to the subscribed terminal devices 1310a, 1310b, 1310c, and 1310d. A first base station 1305a can provide wireless service based on a first radio access technology, whereas a second base station 1305b can provide wireless service based on a second radio access technology. The base stations 1305a and 1305b may be co-located or may be separately installed in the field according to the deployment scenario. The terminal devices 1310a, 1310b, 1310c, and 1310d can support multiple different radio access technologies. The techniques and embodiments described in the present document may be implemented by the base stations of wireless devices described in the present document.
[0338] FIG. 3 is a block diagram representation of a portion of a hardware platform in accordance with one or more embodiments of the present technology can be applied. The hardware platform 1405 may be incorporated into a function such as a network device, a base station, or a wireless device (or a terminal device, UE) , or the first communication device and the second communication device disclosed herein, and can include processor electronics 1410 such as one or more microprocessors, processors, system on chip (SOC) or the like that implements one or more of the wireless communication techniques presented in this document. The hardware platform 1405 can include transceiver electronics 1415 to send and / or receive messages and signals over one or more communication interfaces such as antenna 1420. In some embodiments, the communication interface may be a wired interface, in which case the antenna 1420 may not be needed / used. The hardware platform 1405 can include other communication interfaces for transmitting and receiving data. The hardware platform 1405 can include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronics 1410 can include at least a portion of the transceiver electronics 1415. In some embodiments, at least some of the disclosed techniques, modules or functions are implemented using the hardware platform 1405. In some embodiments, the hardware platform 1405 may be configured to perform the methods described herein.
[0339] 8. Examples of technical solutions
[0340] The following technical solutions may be adopted by some preferred embodiments.
[0341] 1. A method of wireless communication (e.g., method 410 depicted in FIG. 4A) , comprising: receiving (412) , by a first communication device from a second communication device, information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, a transmission resource to carry CSI reporting, a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command; and transmitting (414) , by the first communication device, a channel state information (CSI) reporting to the second communication device or a third communication device, based on one or more received information.
[0342] 2. A method of wireless communication (e.g., method 420 depicted in FIG. 4B) , comprising: receiving (422) , by a second communication device or a third communication device, a channel state information (CSI) reporting from a first communication device, based on one or more received information, wherein the CSI reporting is based on an information transmitted from the second communication device to the first communication device, the information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, UL a transmission resource to carry CSI reporting, RACH a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command. In these solutions, the first communication device may be a user device (or UE) , the second communication device may be a serving or current cell base station and the third communication device may be a target BS to which the UE is being handed over. In some embodiments, after receiving the CSI reporting, the second or the third communication device may perform further wireless communication tasks such as admitting the UE to its network and providing radio access to the first communication device.
[0343] 3. The method of any of solutions 1-2, wherein a first signaling is used to select or update or activate at least one of the following: a subset of cells; a subset of cells from the configured set of cells; a subset of RS resources or sets; a subset of RS resources or sets from the configured set of RS resources or sets; a subset of RS resources or sets from the configured set of RS resources or sets for one or more cells; a subset of RS resources or sets from the configured set of RS resources or sets for one or more selected cells; a subset of CSI reporting configurations; a subset of CSI reporting configurations from the configured set of CSI reporting configurations; a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more cells; a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more selected cells; a subset of TCI states; a subset of TCI states from the configured set of TCI states; a subset of TCI states from the configured set of TCI states for one or more cells; a subset of TCI states from the configured set of TCI states for one or more selected cells; a subset of trigger states; a subset of trigger states from the configured set of trigger states; a subset of trigger states from the configured set of trigger states for one or more cells; or a subset of trigger states from the configured set of trigger states for one or more selected cells.
[0344] 4. The method of any of solutions 1-3, wherein one or more of RS measurement or CSI reporting for CSI acquisition is triggered by at least one of the following: a layer one reference signal received power (L1-RSRP) measurement result; a physical downlink control channel (PDCCH) order; an activated or indicated TCI state; an event to be satisfied; a result of event evaluation; or a second signaling;
[0345] 5. The method of any of solutions 1-4, wherein the CSI reporting is triggered or activated or deactivated or indicated by the second signaling.
[0346] 6. The method of any of solutions 1-5, wherein a CSI request field in the second signaling is configured to one or more of trigger, activate, deactivate, indicate or update at least one of: no CSI reporting; no CSI reporting with other signal / channel / message; a trigger state; a CSI reporting configuration; a CSI reporting to be transmitted; whether a CSI reporting is transmitted; or whether a CSI reporting is transmitted with other signal / channel / message.
[0347] 7. The method of any of solutions 1-6, wherein a codepoint of the CSI request field in the second signaling is mapped to or associated with a trigger state or a CSI reporting configuration.
[0348] 8. The method of any of solutions 1-7, where a trigger state is associated with one or more CSI reporting configurations.
[0349] 9. The method of any of solutions 1-6, wherein a codepoint of the CSI request field in the second signaling indicates a CSI reporting to be transmitted; a CSI reporting not to be transmitted; a CSI reporting to be transmitted with other signal or channel or message; or a CSI reporting to be transmitted and not to be multiplexed with another signal or a channel or a message.
[0350] 10. The method of any of solutions 1-9, wherein a CSI reporting configuration field in the second signaling is used to one or more of trigger, activate, deactivate, indicate or update one or more reporting configurations.
[0351] 11. The method of any of solutions 1-10, where one or more CSI reporting configurations are associated or configured with one or more RS resources or sets or configurations.
[0352] 12. The method of any of solutions 1-11, further including at least one of the following:
[0353] one or more RS resources or sets are associated or configured with a cell index;
[0354] one or more RS resources or sets are associated or configured with more cell indexes;
[0355] one or more RS resources or sets from more RS resources or sets is associated with a cell index;
[0356] one or more RS resources or sets from more RS resources or sets is associated with a cell from a list of cells;
[0357] one or more RS resources from one RS resource set is associated with a cell index; or
[0358] one or more RS resources from one RS resource set is associated with a cell from a list of cells.
[0359] 13. The method of any of solutions 1-12, wherein a signaling medium or a container to carry the CSI reporting transmission is at least one of: an uplink control information (UCI) or a medium access control (MAC) control element (CE) .
[0360] 14. The method of any of solutions 1-13, wherein the transmission resource to carry the CSI reporting or to notify or request the transmission resource to carry CSI reporting can be at least one of the following: a physical uplink shared channel (PUSCH) ; a configured grant physical uplink shared channel (CG-PUSCH) ; a Type-1 or Type-2 configured grant physical uplink shared channel (CG-PUSCH) ; a dynamic grant physical uplink shared channel (DG-PUSCH) ; a physical uplink control channel (PUCCH) ; an uplink resource of a first uplink transmission; a UL resource to carry a handover completion message or radio resource control (RRC) reconfiguration complete; or a UL resource to carry message 3 (MSG 3) or MSG A.
[0361] 15. The method of any of solutions 1-14, wherein the transmission resource to carry the CSI reporting or notify or request UL resource to carry CSI reporting is determined or configured or scheduled or requested by at least one of the following: a Scheduling Request (SR) ; a periodicity; an offset; a time domain resource allocation field; a frequency domain resource allocation field; the second signaling or a third signaling; a QCL RS or RS QCLed with QCL RS in TCI state; or an RS resource or index to determine RO for the PRACH transmission.
[0362] 16. The method of any of solutions 1-15, wherein the CSI reporting is transmitted according to a rule, where the rule is based on one or more of a first timeline restriction and a second timeline restriction.
[0363] 17. The method of any of solutions 16, wherein the first timeline restriction is a gap between CSI reference resource and CSI reporting; or the second timeline restriction is a gap between a signaling triggering or activating CSI reporting and the CSI reporting.
[0364] 18. The method of any of solutions 1-17, wherein one or more RS resources or sets are activated or triggered by the second or a fourth signaling.
[0365] 19. The method of any of solutions 1-18, wherein one or more RS resources or sets are deactivated by a fifth signaling or after a reception of DCI or MAC CE or Layer 1 / Layer 2 triggered mobility (LTM) cell switch command MAC CE.
[0366] 20. The method of any of solutions 1-18, wherein one or more RS resources or sets that have been activated for a cell before a reception of DCI or MAC CE or LTM cell switch command MAC CE are activated with same RS resource or set IDs for a serving cell after a reception of DCI or MAC CE or LTM cell switch command MAC CE.
[0367] 21. The method of any of solutions 1-20, wherein transmission or measurement occasion of RS resource associated with the CSI reporting is no later than CSI reference resource.
[0368] 22. The method of any of solutions 1-21, wherein the first signaling, or the second signaling or the third signaling or the fourth signaling or the signaling can be one or more of: a medium access control (MAC) control element (CE) , or a downlink control information (DCI) , Random Access Response (RAR) UL grant, L1 or L2 triggered mobility (LTM) cell switch command MAC CE, MAC CE for CSI reporting activation or deactivation, MAC CE to carry event-triggered reporting, MAC CE for TCI state activation or deactivation, RAR or RRC message, a higher layer signaling.
[0369] 23. The method of any of solutions 1-22, wherein a gap between reference signal transmission and a signaling triggering RS transmission is provided by a higher layer message, a medium access control message or a physical layer message.
[0370] 24. The method of any of solutions 1-23, wherein a first communication device reports a capability on at least one of the following: a maximum number of simultaneous active candidate cells and / or serving cell; a maximum number of simultaneous active non zero power (NZP) -CSI-RS resources per candidate cell; a maximum number of simultaneous active NZP-CSI-RS resources per serving cell; a maximum number of simultaneous active NZP-CSI-RS resources across candidate cells; a maximum number of simultaneous active NZP-CSI-RS resources across candidate cells and / or serving cell; a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per candidate cell; a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per serving cell; a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells; a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells and / or serving cell; or whether to support CSI acquisition for one or more candidate cells.
[0371] 24. An apparatus for wireless communication, comprising one or more processors configured to cause the apparatus to implement a method recited in any one or more of solutions 1 to 24.
[0372] 25. A computer-readable storage medium having code stored thereon, the code, upon execution by one or more processors, causes the apparatus to implement a method recited in any one or more of solutions 1 to 24.
[0373] Concluding remarks
[0374] It will be appreciated by those of skill in the art that the present document discloses techniques that can be used for rapid acquisition of CSI information in a wireless system.
[0375] Various improvements to CSI reporting for CSI acquisition include the following:
[0376] - (1) Signaling to trigger SP / AP CSI reporting: MAC CE or DCI or RAR UL grant
[0377] → Alt-1: MAC CE
[0378] Case-1: CSI request field is included in the MAC CE
[0379] This field is used to activate and / or indicate a trigger state. Where the trigger state is associated or configured with one or more CSI reporting configuration.
[0380] a codepoint of CSI request field in MAC CE is mapped to a trigger state. Where a list of trigger state is provided by RRC, or the MAC CE.
[0381] Case-2: CSI reporting configuration field is included in the MAC CE
[0382] Understanding#1: This field can trigger / activate / deactivate / update SP CSI reporting configuration.
[0383] Understanding#2: this field can trigger / activate / update and indicate SP CSI reporting configuration.
[0384] Note#1: one or more CSI reporting configurations are provided by RRC, or the MAC CE.
[0385] → Alt-2: DCI
[0386] CSI request field is included in the DCI.
[0387] The DCI can be a DCI scheduling or triggering a UL channel / signal transmission.
[0388] This field is used to indicate activate and / or indicate a trigger state.
[0389] a codepoint of CSI request field in the DCI is mapped to a trigger state. Where a list of trigger state is provided by RRC, or a MAC CE.
[0390] → Alt-3: RAR UL grant
[0391] CSI request field is included in RAR UL grant.
[0392] This field is used to indicate activate and / or indicate a trigger state or a CSI reporting configuration.
[0393] Various improvements to uplink resources for CSI reporting include:
[0394] - (2) UL resource to transmit CSI reporting
[0395] → Alt-1: PUSCH
[0396] Alt-1.1: Configured grant PUSCH
[0397] CG-PUSCH resource can be provided by RRC or MAC CE.
[0398] Alt-1.2: Dynamic grant PUSCH
[0399] The time and / or frequency domain of PUSCH can be included or indicated by at least one of MAC CE or DCI or RAR UL grant.
[0400] → Alt-2: PUCCH
[0401] PUCCH resource can be provided by RRC or MAC CE or RAR
[0402] → Alt-3: Same as the UL resource of first UL transmission or carrying HO completion information or MAG A PUSCH or MSG 3.
[0403] Various improvements to the timeline implemented for CSI report transmission include.
[0404] - (3) Timeline to transmit CSI reporting
[0405] → Alt-1: based on the gap between signaling to trigger CSI reporting and UL resource to carry CSI reporting to be determined by at least one of: RRC, DCI or MA CE indication or configuration.
[0406] → Alt-2: based on UL resource of first UL transmission or carrying HO completion information or MAG A PUSCH or MSG 3.
[0407] - Note#2: In mobility scenario, the MAC CE can be seen as LTM cell switch command MAC CE.
[0408] - Note#3: CSI reporting is obtained based on RS measurement where RS resource (s) are associated with CSI reporting configuration.
[0409] Various improvements to RS measurements for CSI acquisition include:
[0410] B. RS measurement for CSI acquisition
[0411] - One or more RS resource configurations is associated with one or more CSI reporting configuration.
[0412] → The time domain of RS transmission: periodic, aperiodic, semi-persistent
[0413] - AP / SP CSI-RS transmission
[0414] → Signaling to trigger AP / SP CSI-RS transmission: MAC CE or DCI
[0415] CSI request field or CSI-RS resource or set field is included in MAC CE or DCI.
[0416] → Timeline of AP CSI-RS transmission: the gap between the signaling to trigger AP CSI-RS and AP CSI-RS transmission is provided by RRC or MAC CE or DCI.
[0417] - Validation of CSI-RS resource
[0418] → CSI-RS measurement is performed no later than a reference point.
[0419] The reference point is determined based on slot n-x. where CSI reporting is transmitted on slot n. X can be configurable or fixed value or based on application time of the indicated TCI state in MAC CE, or the time where MAC CE to trigger RS transmission takes effect or the time where RRC configuration information is parsed and / or complected.
[0420] - Restriction on the number of active CSI-RS resources / ports for one or more cells
[0421] The following technical solutions may be adopted by some preferred embodiments.
[0422] The disclosed and other embodiments, modules and the functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium for execution by, or to control the operation of, data processing apparatus. The computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more of them. The term “data processing apparatus” encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information for transmission to suitable receiver apparatus.
[0423] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document) , in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code) . A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
[0424] The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit) . Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read only memory or a random-access memory or both. The essential elements of a computer are a processor for performing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto optical disks, or optical disks. However, a computer need not have such devices. Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto optical disks; and CD ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.
[0425] It is noted that operation of the wireless communications as disclosed herein causes a reduction in greenhouse gas emissions compared to traditional methods. The International Energy Agency (IEA) estimates that the overall share of carbon emissions from information and communication technologies (ICT) accounts for approximately 4%of the total amount of CO2 emitted around world. Further, conventional networks can sometimes exacerbate the causes of climate change. For example, at an average of approximately 485g of CO2 per KWh of electricity that is produced worldwide, it results in a rough estimate of 145.5 million metric tons of CO2. The implementations disclosed herein for operating the wireless communications can reduce power consumption by improving efficiency of channel state reporting and reducing signaling overhead and latency.
[0426] Moreover, Global System for Mobile Communications Association (GSMA) , the organization that represents mobile operators and the telecommunication industry worldwide, has estimated that currently 20–40%of the operating cost of network operators is taken up by electricity, and that 5G can cause a substantial (as much as four to five fold) increase of energy consumption in the RAN, but that the technical means to reduce this consumption can be included in later generation mobile networks, such as 6G networks. Avoiding unnecessary resources for handovers that may not be successful or optimal, by using the pre-verification techniques described herein, may cause less wireless message transmissions. Therefore, the disclosed implementations for operation of the wireless communications mitigates climate change and the effects of climate change.
[0427] While this patent document contains many specifics, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. Certain features that are described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
[0428] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Moreover, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.
[0429] Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.
Claims
1.A method of wireless communication, comprising:receiving, by a first communication device from a second communication device, information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, a transmission resource to carry CSI reporting, a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command; andtransmitting, by the first communication device, a channel state information (CSI) reporting to the second communication device or a third communication device, based on one or more received information.2.A method of wireless communication, comprising:receiving, by a second communication device or a third communication device, a channel state information (CSI) reporting from a first communication device, based on one or more received information,wherein the CSI reporting is based on an information transmitted from the second communication device to the first communication device, the information including one or more of: one or more channel state information (CSI) reporting configurations, one or more reference signal (RS) resources or sets, one or more cell configurations, whether to enable CSI acquisition, UL a transmission resource to carry CSI reporting, RACH a random access channel (RACH) configuration, a transmission configuration indicator (TCI) state configuration, a trigger state configuration, or a handover command.3.The method of any of claims 1-2, wherein a first signaling is used to select or update or activate at least one of the following:a subset of cells;a subset of cells from the configured set of cells;a subset of RS resources or sets;a subset of RS resources or sets from the configured set of RS resources or sets;a subset of RS resources or sets from the configured set of RS resources or sets for one or more cells;a subset of RS resources or sets from the configured set of RS resources or sets for one or more selected cells;a subset of CSI reporting configurations;a subset of CSI reporting configurations from the configured set of CSI reporting configurations;a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more cells;a subset of CSI reporting configurations from the configured set of CSI reporting configurations for one or more selected cells;a subset of TCI states;a subset of TCI states from the configured set of TCI states;a subset of TCI states from the configured set of TCI states for one or more cells;a subset of TCI states from the configured set of TCI states for one or more selected cells;a subset of trigger states;a subset of trigger states from the configured set of trigger states;a subset of trigger states from the configured set of trigger states for one or more cells; ora subset of trigger states from the configured set of trigger states for one or more selected cells.4.The method of any of claims 1-3, wherein one or more of RS measurement or CSI reporting for CSI acquisition is triggered by at least one of the following:a layer one reference signal received power (L1-RSRP) measurement result;a physical downlink control channel (PDCCH) order;an activated or indicated TCI state;an event to be satisfied;a result of event evaluation; ora second signaling.5.The method of any of claims 1-4, wherein the CSI reporting is triggered or activated or deactivated or indicated by the second signaling.6.The method of any of claims 1-5, wherein a CSI request field in the second signaling is configured to one or more of trigger, activate, deactivate, indicate or update at least one of:no CSI reporting;no CSI reporting with other signal / channel / message;a trigger state;a CSI reporting configuration;a CSI reporting to be transmitted;whether a CSI reporting is transmitted; orwhether a CSI reporting is transmitted with another signal / channel / message.7.The method of any of claims 1-6, wherein a codepoint of the CSI request field in the second signaling is mapped to or associated with a trigger state or a CSI reporting configuration.8.The method of any of claims 1-7, where a trigger state is associated with one or more CSI reporting configurations.9.The method of any of claims 1-6, wherein a codepoint of the CSI request field in the second signaling indicates a CSI reporting to be transmitted; a CSI reporting not to be transmitted; a CSI reporting to be transmitted with other signal or channel or message; or a CSI reporting to be transmitted and not to be multiplexed with another signal or a channel or a message.10.The method of any of claims 1-9, wherein a CSI reporting configuration field in the second signaling is used to one or more of trigger, activate, deactivate, indicate or update one or more reporting configurations.11.The method of any of claims 1-10, where one or more CSI reporting configurations are associated or configured with one or more RS resources or sets or configurations.12.The method of any of claims 1-11, further including at least one of the following:one or more RS resources or sets are associated or configured with a cell index;one or more RS resources or sets are associated or configured with more cell indexes;one or more RS resources or sets from more RS resources or sets is associated with a cell index;one or more RS resources or sets from more RS resources or sets is associated with a cell from a list of cells;one or more RS resources from one RS resource set is associated with a cell index; orone or more RS resources from one RS resource set is associated with a cell from a list of cells.13.The method of any of claims 1-12, wherein a signaling medium or a container to carry the CSI reporting transmission is at least one of: an uplink control information (UCI) or a medium access control (MAC) control element (CE) .14.The method of any of claims 1-13, wherein the transmission resource to carry the CSI reporting or to notify or request the transmission resource to carry CSI reporting can be at least one of the following:a physical uplink shared channel (PUSCH) ;a configured grant physical uplink shared channel (CG-PUSCH) ;a Type-1 or Type-2 configured grant physical uplink shared channel (CG-PUSCH) ;a dynamic grant physical uplink shared channel (DG-PUSCH) ;a physical uplink control channel (PUCCH) ;an uplink resource of a first uplink transmission;a UL resource to carry a handover completion message or radio resource control (RRC) reconfiguration complete; ora UL resource to carry message 3 (MSG 3) or MSG A.15.The method of any of claims 1-14, wherein the transmission resource to carry the CSI reporting or notify or request UL resource to carry CSI reporting is determined or configured or scheduled or requested by at least one of the following:a Scheduling Request (SR) ;a periodicity;an offset;a time domain resource allocation field;a frequency domain resource allocation field;the second signaling or a third signaling;a QCL RS or RS QCLed with QCL RS in TCI state; oran RS resource or index to determine RO for the PRACH transmission.16.The method of any of claims 1-15, wherein the CSI reporting is transmitted according to a rule, where the rule is based on one or more of a first timeline restriction and a second timeline restriction.17.The method of any of claims 16, wherein the first timeline restriction is a gap between CSI reference resource and CSI reporting; or the second timeline restriction is a gap between a signaling triggering or activating CSI reporting and the CSI reporting.18.The method of any of claims 1-17, wherein one or more RS resources or sets are activated or triggered by the second or a fourth signaling.19.The method of any of claims 1-18, wherein one or more RS resources or sets are deactivated by a fifth signaling or after a reception of DCI or MAC CE or Layer 1 / Layer 2 triggered mobility (LTM) cell switch command MAC CE.20.The method of any of claims 1-18, wherein one or more RS resources or sets that have been activated for a cell before a reception of DCI or MAC CE or LTM cell switch command MAC CE are activated with same RS resource or set IDs for a serving cell after a reception of DCI or MAC CE or LTM cell switch command MAC CE.21.The method of any of claims 1-20, wherein transmission or measurement occasion of RS resource associated with the CSI reporting is no later than CSI reference resource.22.The method of any of claims 1-21, wherein the first signaling, or the second signaling or the third signaling or the fourth signaling or the signaling can be one or more of: a medium access control (MAC) control element (CE) , or a downlink control information (DCI) , Random Access Response (RAR) UL grant, L1 or L2 triggered mobility (LTM) cell switch command MAC CE, MAC CE for CSI reporting activation or deactivation, MAC CE to carry event-triggered reporting, MAC CE for TCI state activation or deactivation, RAR or RRC message, a higher layer signaling.23.The method of any of claims 1-22, wherein a gap between reference signal transmission and a signaling triggering RS transmission is provided by a higher layer message, a medium access control message or a physical layer message.24.The method of any of claims 1-23, wherein a first communication device reports a capability on at least one of the following:a maximum number of simultaneous active candidate cells and / or serving cell;a maximum number of simultaneous active nonzero power (NZP) -CSI-RS resources per candidate cell;a maximum number of simultaneous active NZP-CSI-RS resources per serving cell;a maximum number of simultaneous active NZP-CSI-RS resources across candidate cells;a maximum number of simultaneous active NZP-CSI-RS resources across candidate cells and / or serving cell;a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per candidate cell;a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources per serving cell;a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells;a maximum total number of active CSI-RS ports in simultaneous active NZP-CSI-RS resources across candidate cells and / or serving cell; orwhether to support CSI acquisition for one or more candidate cells.25.An apparatus for wireless communication, comprising one or more processors configured to cause the apparatus to implement a method recited in any one or more of claims 1 to 24.26.A computer-readable storage medium having code stored thereon, the code, upon execution by one or more processors, causes the apparatus to implement a method recited in any one or more of claims 1 to 24.