WO2022213284A1 - Procédés d'activation de cellule et d'amélioration de la couverture - Google Patents

Procédés d'activation de cellule et d'amélioration de la couverture Download PDF

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Publication number
WO2022213284A1
WO2022213284A1 PCT/CN2021/085719 CN2021085719W WO2022213284A1 WO 2022213284 A1 WO2022213284 A1 WO 2022213284A1 CN 2021085719 W CN2021085719 W CN 2021085719W WO 2022213284 A1 WO2022213284 A1 WO 2022213284A1
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WIPO (PCT)
Prior art keywords
reference signals
triggering
scell
pusch
mac
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PCT/CN2021/085719
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English (en)
Inventor
Jian Li
Xingguang WEI
Jing Shi
Xianghui HAN
Yiwei DENG
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Zte Corporation
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Priority to PCT/CN2021/085719 priority Critical patent/WO2022213284A1/fr
Priority to CN202180073949.2A priority patent/CN116391416A/zh
Publication of WO2022213284A1 publication Critical patent/WO2022213284A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands

Definitions

  • This document is directed generally to wireless communications.
  • Wireless communication technologies are moving the world toward an increasingly connected and networked society.
  • the rapid growth of wireless communications and advances in technology has 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.
  • next generation systems and wireless communication techniques need to provide support for an increased number of users and devices.
  • This document relates to methods, systems, and devices for transmitting configuration information in mobile communication technology, including 5th Generation (5G) , and new radio (NR) communication systems.
  • 5G 5th Generation
  • NR new radio
  • a wireless communication method includes receiving, at a wireless device from a network device, control information; triggering a first number of reference signals corresponding to a first number of serving cells based on the control information; and activating a second number of secondary cells based on the control information, wherein the first number is greater than or equal the second number.
  • a wireless communication method includes transmitting, to a wireless device from a network device, control information; and transmitting a first number of reference signals corresponding to a first number of serving cells based on the control information, wherein the control information enables the wireless device to activate a second number of secondary cells based on the control information, and wherein the first number is greater than or equal the second number.
  • the above-described methods are embodied in the form of processor-executable code and stored in a computer-readable program medium.
  • a device that is configured or operable to perform the above-described methods is disclosed.
  • FIG. 1 shows an example of a base station (BS) and user equipment (UE) in wireless communication.
  • BS base station
  • UE user equipment
  • FIG. 2 shows an IE NZP-CSI-RS-ResourceSet.
  • FIG. 3 shows an example SCell activation.
  • FIG. 4 shows an example aperiodic trigger state design.
  • FIG. 5 shows an example of a resource set corresponding to the aperiodic TRS trigger MAC CE.
  • FIG. 6 shows an example MAC-CE configuration
  • FIG. 7 shows an example MAC-CE configuration.
  • FIG. 8 shows an example timeline of TRS triggering using MAC-CE.
  • FIG. 9 shows an example MAC-CE configuration.
  • FIG. 10 shows an example MAC-CE configuration.
  • FIG. 11 shows a CSI-ResourcePeriodicityAndOffset IE.
  • FIG. 12 shows a NZP-CSI-RS-ResourceSet IE.
  • FIG. 13 shows an example TRS transmission.
  • FIG. 14 shows an example method.
  • FIG. 15 shows an example PUCCH transmission overlapping with a TBoMS PUSCH.
  • FIG. 16 shows an example of PUCCH and TBoMS PUSCH overlapping within one slot.
  • FIG. 17 shows an example of PUCCH and TBoMS PUSCH overlapping within multiple slots.
  • FIG. 18 shows an example overlap scenario.
  • FIG. 19 shows an example overlap scenario where PUCCH and TBoMS PUSCH are overlapped within multiple actual TOs.
  • FIG. 20 shows an example scenario where multiple PUCCHs and TBoMS PUSCH are overlapped within multiple actual TOs.
  • FIG. 21 shows an example MAC RAR.
  • FIG. 22 is a block diagram representation of a portion of an apparatus that can be used to implement methods and/or techniques of the presently disclosed technology.
  • 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. Certain features are described using the example of Fifth Generation (5G) wireless protocol. However, applicability of the disclosed techniques is not limited to only 5G wireless systems
  • FIG. 1 shows an example of a wireless communication system (e.g., a long term evolution (LTE) , 5G or NR cellular network) that includes a base station (BS) 120 and one or more user equipment (UE) 111, 112 and 113.
  • the uplink transmissions (131, 132, 133) can include uplink control information (UCI) , higher layer signaling (e.g., UE assistance information or UE capability) , or uplink information.
  • the downlink transmissions (141, 142, 143) can include DCI or high layer signaling or downlink information.
  • the UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, a terminal, a mobile device, an Internet of Things (IoT) device, and so on.
  • M2M machine to machine
  • IoT Internet of Things
  • MR-DC Multi-Radio Dual Connectivity
  • Case 2 It has been discussed using temporary RS for SCell activation in multiple scenarios (FR1/FR2, known/unknown cell, etc. ) , including how many temporary RS bursts/symbols are required to achieve both UE AGC setting and time/frequency tracking.
  • FR1/FR2, known/unknown cell, etc. A summary can be found in following table. It can be seen that if the SCell measurement cycle is larger than 160 ms, then one additional temporary RS burst is needed, and a gap between the RS symbol (s) for AGC and the RS symbols for time/frequency acquisition may be needed. For FR2, more temporary RS bursts and symbols are needed for beam sweeping.
  • the information element (IE) repetiton in IE NZP-CSI-RS-ResourceSet in TS 38.331 can be used, but this IE cannot indicate the number of repetitions.
  • FIG. 2 shows an IE NZP-CSI-RS-ResourceSet.
  • the IE repetition indicates whether repetition is on or off. If the field is set to off or if the field is absent, the UE cannot assume that the NZP-CSI-RS resources within the resource set are transmitted with the same downlink spatial domain transmission filter. It can only be configured for channel state information reference signal (CSI-RS) resource sets which are associated with CSI-ReportConfig configured to report L1-RSRP or "no report" .
  • CSI-RS channel state information reference signal
  • PUSCH Physical Uplink Shared Channel
  • FIG. 3 shows an example SCell activation.
  • the UE upon receiving an SCell activation command in slot n, the UE can transmit a valid channel state information (CSI) report and apply actions related to the activation command for the SCell being activated no earlier than n+k and no later than slot n+ [T HARQ + T activation_time + T CSI_Reporting ] /T slotlength as shown in FIG. 3, where T HARQ is the timing between DL data transmission and acknowledgement, i.e., k 1 as defined in RAN1. According to TS38.331, the potential values for k 1 can be ⁇ 0-15 ⁇ slots.
  • CSI channel state information
  • T activation_time is mainly used for time-domain and frequency-domain synchronization, RF warm up, and AGC adjustment.
  • T CSI_Reporting is the delay including uncertainty in acquiring the first available downlink CSI reference resource, UE processing time for CSI reporting, and uncertainty in acquiring the first available CSI reporting resource.
  • the explicit information field for the SCell dormancy indication is a bitmap of length N.
  • the bitmap is appended to existing fields of non-fallback downlink control information (DCI) (i.e., size of DCI format 0-1, 1-1 is increased by N (0 ⁇ N ⁇ 5) bits) .
  • DCI non-fallback downlink control information
  • a Physical Downlink Control Channel (PDCCH) with DCI format 1-1 is used for indicating dormancy for SCells
  • PDSCH Physical Downlink Shared Channel
  • up to 15 dormancy cells can be indicated by repurposing the scheduling fields (i.e., MCS (5) , NDI (1) , RV (2) , Hybrid Automatic Repeat reQuest (HARQ) process number (4) , Antenna port (s) (at least 4) , Demodulation Reference Signal (DMRS) sequence initialization) for dormancy indication.
  • MCS (5) the scheduling fields
  • NDI (1) NDI (1)
  • RV (2) Hybrid Automatic Repeat reQuest
  • HARQ Hybrid Automatic Repeat reQuest
  • s Antenna port (s) (at least 4)
  • DMRS Demodulation Reference Signal
  • UE If UE is in a non-dormant BWP, UE switches to dormant BWP.
  • UE If UE is in a dormant BWP, UE continues with the dormant BWP.
  • UE If UE is in a non-dormant BWP, UE continues with the non-dormant BWP.
  • Radio Resource Control If UE is in a dormant BWP, the UE switches to a specific non-dormant BWP explicitly configured by Radio Resource Control (RRC) .
  • RRC Radio Resource Control
  • Option 1 MAC Control Element (s) (MAC-CE (s) ) contained in a single PDSCH to trigger both SCell activation and corresponding temporary RS (s) .
  • MAC-CE MAC Control Element
  • ⁇ Option 1a Legacy MAC-CE for SCell activation, and a new MAC-CE for Temporary RS trigger.
  • ⁇ Option 1b A new MAC-CE for both triggers.
  • Option 1c A PDSCH Transport Block (TB) and its scheduling DL Grant, and DL Grant for temporary RS trigger.
  • Option 1d Legacy MAC-CE for SCell activation, and implicit trigger temporary RS in Rel-17.
  • Option 2 A single DCI to trigger both SCell activation and corresponding temporary RS (s) .
  • Option 3 A Rel-15/16 SCell activation MAC-CE to trigger SCell activation and a Rel-15/16 DCI to trigger corresponding temporary RS (s) with enhancement of timeline.
  • TRS Tracking RS
  • A-TRS Aperiodic Tracking RS
  • P-TRS Periodic Tracking RS
  • SP-TRS Semi-persistent Tracking RS
  • a burst of a temporary RS is notated as follows:
  • All the BWPs configured on a cell are inactive before the cell is activated. If a UE measures the triggered temporary RS during the SCell activation procedure, the measurement on the target BWP should be performed regardless of the activation state of the BWP. There are two main views as to which BWP the UE should measure the temporary RS on:
  • gNodeB indicates the BWP along with an indication to trigger the temporary RS.
  • PUSCH and Msg3 PUSCH are potential coverage bottleneck channels, and corresponding enhancements are needed.
  • transport block (TB) processing over multiple slots (TBoMS) is proposed as a way for coverage enhancement.
  • UCI (uplink control information) multiplexing on PUSCH for TBoMS should be determined, such as the location, timeline, or coded modulation symbols used for UCI multiplexing on TBoMS PUSCH.
  • Msg3 PUSCH repetition has been identified to provide coverage enhancement. However, how to indicate the number of repetitions is not decided yet.
  • This example relates to methods for efficient SCell activation.
  • K additional MAC-CEs can be used to trigger TRS corresponding to K cells.
  • a first MAC CE can be used to activate N SCells.
  • an additional K MAC CEs triggers several A-TRSs for K cells, where K is greater than or equal to N.
  • the K cells include activated PCells and/or SCells.
  • Multiple MAC CEs can be sent to trigger A-TRS, and each MAC CE used to trigger A-TRS indicates M A-TRS’s used to activate a cell, where M can be greater than or equal to 1.
  • the A-TRS can be an aperiodic trigger state or resource set.
  • FIG. 4 shows an example aperiodic trigger state design.
  • the BWP ID field indicates the DL BWP ID of the MAC CE application.
  • the Serving Cell ID field indicates a certain SCell or PCell of the MAC CE application.
  • the T i field indicates the triggered aperiodic trigger state, and setting this field to 1 indicates that the aperiodic trigger state is triggered.
  • the R domain is a reserved bit, set to 0.
  • FIG. 5 shows an example of a resource set corresponding to the aperiodic TRS trigger MAC CE.
  • the BWP ID field indicates the DL BWP ID of the MAC CE application.
  • the Serving Cell ID field indicates a certain SCell or PCell of the MAC CE application.
  • the NZP CSI-RS resource set ID i field indicates whether the aperiodic NZP CSI-RS resource set is activated, and the minimum settable number is 1.
  • the transmission configuration indicator (TCI) State ID i field indicates the TCI state corresponding to the resource in the resource set; if the A/D field is set to 0, the octets corresponding to the TCI State ID field do not exist.
  • the R domain is a reserved bit, set to 0.
  • a single new MAC-CE can be used to trigger M TRSs of K cells, where M can be greater than or equal to 1.
  • FIG. 6 shows an example MAC-CE configuration.
  • the serving cell ID becomes a serving cell list, which can include PCell and SCells.
  • the serving cell list can have up to 16 or 32 cells, indicated by a bitmap. Although FIG. 6 shows 16 cells, in some embodiments, the serving cell list can have any whole number of cells. In one example, the serving cell list can be configured as 1010110000010000, which indicates that Cell 1 (PCell) , Cell 3, Cell 5, Cell 6, and Cell 12 need to trigger TRS on the same slot.
  • FIG. 7 shows an example MAC-CE configuration.
  • a new RRC high-level parameter IE Scell-groups-for-R17-Scell-activation can be defined, and the servingcell ID field in the MAC-CE becomes ScellGroupID.
  • the new IE can be used to confirm the number of bits corresponding to the ScellGroupID field in MAC-CE.
  • the grouping depends on CCs within intra-band CA, which can include PCell and SCells.
  • the IE Scell-groups-for-R17-Scell-activation is configured as Group 1 with Cell 1 (PCell) , Cell 3, Cell 5, and Cell 6 in a first band in intra-band CA; Group 2 with Cell 2, Cell 4, Cell 7, and Cell 8 are in a second band in intra-band CA; and Group 3 with Cell 9 and Cell l0 are in a third band in intra-band CA.
  • the ScellGroupID field in MAC-CE is 3 bits corresponding to the 3 groups. When the ScellGroupID field in MAC-CE is configured as 010, the Cell 2, Cell 4, Cell 7, and Cell 8 within Group 2 trigger TRS on the same slot.
  • FIG. 8 shows an example timeline of TRS triggering using MAC-CE.
  • a trigger offset can be configured when triggering a TRS.
  • the starting location of the trigger offset has not yet been clearly discussed. There are several possibilities:
  • the starting position may be the slot where acknowledgment (ACK) feedback is received by the PDSCH where the MAC-CE is located.
  • ACK acknowledgment
  • the starting position may be one slot after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located.
  • the starting position may be three slots after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located.
  • the starting position may be four slots after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located.
  • the starting position can be other numbers of slots after receiving ACK feedback from the PDSCH where the MAC-CE is located, such as 2, 5, 6, 7, etc.
  • FIG. 9 shows an example MAC-CE configuration.
  • the BWP ID field indicates the DL BWP ID of the MAC CE application.
  • the SCell Group ID field indicates an SCell group of the MAC CE application.
  • the NZP CSI-RS resource set ID i field indicates whether the aperiodic NZP CSI-RS resource set is activated, and the minimum settable number is 1.
  • the transmission configuration indicator (TCI) State ID i field indicates the TCI state corresponding to the resource in the resource set; if the A/D field is set to 0, the octets corresponding to the TCI State ID field do not exist.
  • the R domain is a reserved bit, set to 0.
  • FIG. 10 shows an example MAC-CE configuration. If only one SCell's TRS can be triggered, then it can be implicitly indicated that the PCell and/or SCells which are in intra-band CA with the SCell need also trigger TRS. All other cells trigger TRS at the same time, including PCells and/or SCells. For example, if SCell 2 needs to activate and trigger TRS, and PCell and SCell 3 are activated cells and in intra-band CA with SCell 2, then the PCell, SCell 2 and SCell 3 all trigger TRS on the same slot.
  • FIG. 8 shows an example timeline of TRS triggering using MAC-CE.
  • a trigger offset can be configured when triggering a TRS.
  • the starting location of the trigger offset has not yet been clearly discussed. There are several possibilities:
  • the starting position may be the slot where acknowledgment (ACK) feedback is received by the PDSCH where the MAC-CE is located;
  • the starting position may be one slot after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located;
  • the starting position may be three slots after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located;
  • the starting position may be four slots after the slot where ACK feedback is received by the PDSCH where the MAC-CE is located;
  • the starting position can be other numbers of slots after receiving ACK feedback from the PDSCH where the MAC-CE is located, such as 2, 5, 6, 7, etc.
  • DCI is used for SCell activation and deactivation
  • DCI is used to trigger TRS.
  • Rel-16 introduced a method to switch from dormancy BWP to normal BWP.
  • SCells can be activated quickly through the SCell dormancy indication field in the DCI, where the SCell dormancy indication is used to determine the number of bits according to a high-level parameter Scell-groups-for-dormancy-within-active-time in an RRC message.
  • Each bit corresponds to an SCell Group, which can be configured through the high-level parameter Scell-groups-for-dormancy-within-active-time in the RRC message.
  • the SCell dormancy indication field can be reused to activate/deactivate SCells.
  • the RRC configuration can put the SCells of the same intra-band into a group. If the bit indicating the group is set to 1, then the field used to trigger the TRS in DCI can trigger TRS for cells in the entire group.
  • the TRS can be trigger for the PCell co-banded with SCells at the same time through the default behavior.
  • bit fields such as the carrier indicator field (CIF) in DCI, can be reinterpreted.
  • a new domain can be added, or the RRC message can be redefined to put all intra-band CA cells in one group, including PCells and SCells.
  • a new RRC IE Scell-groups-for-R17-sell-activation can be used to activate or deactivate SCells.
  • the RRC configuration can put the PCell and SCells of the same intra-band into a group. If the bit indicating the group is set to 1, then the field used to trigger the TRS in DCI can trigger TRS for cells in the entire group.
  • the new IE can confirm the number of bits corresponding to an SCell dormancy indication field in DCI.
  • the IE Scell-groups-for-R17-Scell-activation can be configured as Group 1 with Cell 1 (PCell) , Cell 3, Cell 5, and Cell 9 in a first band in intra-band CA; Group 2 with Cell 2, Cell 4, Cell 7, and Cell 8 are in a second band in intra-band CA; Group 3 with Cell 10 and Cell l1 are in a third band in intra-band CA; Group 4 with Cell 12, Cell 13, Cell 14, and Cell 16 are in a fourth band in intra-band CA; and Group 5 includes Cell 15.
  • the SCell dormancy indication field in DCI is 5 bits correspond to the 5 groups.
  • the SCell dormancy indication field in DCI is configured as 01010, the all cells in Group 2 and Group 4 trigger TRS on the same slot.
  • the SCell dormancy indication field can be a new field in DCI.
  • SCell dormancy indication can be used to activate SCells by reinterpreting existing bit fields.
  • DCI bit size must be consistent, which means that the SCell dormancy indication field in DCI is not used.
  • the first bit of this field can be passed to indicate whether to trigger the TRS for PCell.
  • other fields such as the CIF field, can be used.
  • the subcarrier spacing can be different for different cells.
  • DCI scheduling fields i.e., Modulation and Coding Scheme (MCS) (5) , New Data Indicator (NDI) (1) , Redundancy Version (RV) (2) , Hybrid Automatic Repeat request (HARQ) process number (4) , Antenna port (s) (at least 4) , and Demodulation Reference Signal (DMRS) sequence initialization
  • MCS Modulation and Coding Scheme
  • NDI New Data Indicator
  • RV Redundancy Version
  • HARQ Hybrid Automatic Repeat request
  • s Antenna port
  • DMRS Demodulation Reference Signal
  • the DCI can trigger TRS through the CSI-request field.
  • DCI can be DCI format 0-1, DCI format 1-1, DCI format 2-6.
  • TRS can be A-TRS, SP-TRS or P-TRS.
  • DCI can be used for both activation and deactivation.
  • the specific location where the TRS is sent depends on the target BWP of the SCell to be activated and the activated BWP of the activated cell in the maximum or minimum configuration subcarrier spacing (SCS) .
  • the location where the TRS is sent can also depend on the target BWP SCS of the SCell to be activated as a reference or the activated BWP.
  • the activated BWP of the cell can be determined by reference.
  • SCell 4 is set to activate and trigger TRS
  • SCell 3 is an activated cell and in intra-band CA with SCell 4.
  • SCell 4’s target BWP SCS is 30KHz
  • the activated BWP’S SCS of SCell 3 is 15KHz.
  • SCell 4 and SCell 3 must trigger TRS on the same slot, and the location slot can depend on the maximum (30HKz) or minimum (15HKz) configuration SCS, the target BWP SCS of the SCell (SCell 4) to be activated as a reference, or the activated BWP of the cell (SCell 3) determined by reference.
  • This example relates to methods for efficient SCell activation.
  • a TRS burst can include one or more TRSs over a number of time domain units, such as slots. When the TRS requires more than one burst, additional bursts can be achieved through repetition.
  • the restriction that TRS cannot be configured with repetition can be removed in the protocol.
  • the following embodiments address how repetition transmission takes into account the gap between RS symbol (s) for AGC (automatic gain control) for time/frequency acquisition.
  • FIG. 11 shows a CSI-ResourcePeriodicityAndOffset IE.
  • N the current high-level parameters as shown below support a minimum period of 4 slots, but the gap value may only have 1 slot, etc.
  • the CSI-ResourcePeriodicityAndOffset IE must be modified to add slot1 INTEGER (0) , slots2 INTEGER (0.. 1) , slots3 INTEGER (0.. 2) , etc.
  • the IE CSI-ResourcePeriodicityAndOffset is used to configure a periodicity and a corresponding offset for periodic and semi-persistent CSI resources and for periodic and semi-persistent reporting on Physical Uplink Control Channel (PUCCH) .
  • Both periodicity and an offset are given using the number of slots.
  • the periodicity value slots4 can corresponds to 4 slots
  • the value slots5 can correspond to 5 slots, etc.
  • the repetition can configured using A-TRS, and the gap duration can be configured by configuring the number of repetitions.
  • a parameter repetitionNumber can be added to the IE. For example, if RAN4 defines a gap value of 2 slots, the repetition number can be configured to 6, so that the first and second slots can be used for AGC adjustment, and the fifth and sixth slots can be used for channel tracking.
  • FIG. 12 shows an NZP-CSI-RS-ResourceSet IE.
  • the IE NZP-CSI-RS-ResourceSet is a set of Non-Zero-Power (NZP) CSI-RS resources (their IDs) and set-specific parameters.
  • NZP Non-Zero-Power
  • the temporary RS can be A-TRS. Repetitions can be configured by configuring a time window to execute the repetitions.
  • a high-level parameter specifying a time window can be added.
  • TRS repetition is only valid in the specified time window, and different time window lengths can be configured according to different UE capabilities. Note the repetition may not occupy the entire time window, which means that the length of the repetition is less than or equal to the time window.
  • the time window can be increased to decrease overhead.
  • the length of the time window can 5 slots, where a gap is 1 slot.
  • the first and second slot (which comprise 1 burst) in the time window can be used for AGC adjustment, and the fourth and fifth slots (another burst) can be used for channel tracking.
  • Different time window repetitions can used for beam sweeping, including an AGC adjustment and channel tracking in each repetition.
  • an offset can be configured between successive time window repetitions.
  • the number of repetitions can also be configured as any whole number k.
  • a time window length is 5 slots.
  • An offset between time windows can be set to two slots.
  • a TRS transmission with two time windows comprises: repetition 1; a 2 slots offset; and repetition2.
  • the TRS is transmitted on a total of 10 slots in 2 time windows.
  • using option 1 requires transmission using a total of 12 slots, which results in higher overhead.
  • the gap within a time window can be configured so that the TRS is not transmitted during that time. For example, if the slots used for a TRS burst or the slots used for the gap can be identified, then those slots can be configured more efficiently.
  • FIG. 13 shows an example TRS transmission.
  • a repetition duration can be configured, where the duration is the continuous slot length used to send the TRS.
  • offset1 can be configured and refers to the gap value between bursts used for AGC and T/F tracking within one beam.
  • offset2 can be configured, where offset2 refers to a gap value between different beams, such as Beam 1 and Beam 2 shown in FIG. 13.
  • the number of repetitions, K can also be defined. In some embodiments, the number of repetitions can be used to configure beam sweeping, when necessary.
  • offset1 and offset2 can be configured with a single parameter.
  • one parameter in RRC can indicate offset2 and offset1 at the same time.
  • only offset 1 is configured, only offset2 is configured, or both offset1 and offset2 are configured.
  • offset1 and offset2 can be configured to be a specified length of time, and the number of repetitions K can indicate the number of beams.
  • the TRS can be indicated as a quasi co-location (QCL) source for an SSB or CSI-RS.
  • the quasi co-location relationship can be configured by a higher layer parameter qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS (if configured) .
  • the QCL types can be different, regardless of whether the references are to the same DL RS or different DL RSs.
  • the QCL types corresponding to each DL RS can be given by the higher layer parameter qcl-Type in QCL-Info and can take one of the following values:
  • ⁇ 'QCL-TypeA' ⁇ Doppler shift, Doppler spread, average delay, delay spread ⁇
  • ⁇ 'QCL-TypeB' ⁇ Doppler shift, Doppler spread ⁇
  • the UE can receive an activation command used to map up to 8 TCI states to the codepoints of the DCI field 'Transmission Configuration Indication' in one component carrier (CC) /DL BWP or in a set of CCs/DL BWPs.
  • CC component carrier
  • a set of TCI state IDs are activated for a set of CCs/DL BWPs, where the applicable list of CCs is determined by an indicated CC in the activation command, the same set of TCI state IDs are applied for all DL BWPs in the indicated CCs.
  • the SSB or CSI-RS can be QCLed with the TRS via any paired combination of: QCL-typeA, QCL-typeB, QCL-typeC, and QCL-typeD. Examples of some of these combinations are shown below:
  • FIG. 14 shows an example method 1400.
  • control information is received at a wireless device.
  • a first number of reference signals corresponding to a first number of serving cells is triggered based on the control information.
  • a second number of SCells is activated based on the control information.
  • the first number can be greater than or equal to the second number.
  • the first number can be less than or equal to the total number of component carriers serving the wireless device, for a wireless device operating in CA.
  • the first number of serving cells can include activated and deactivated serving cells, SCells, or PCells.
  • the reference signals are Aperiodic Tracking Reference Signals.
  • the control information includes a MAC-CE, similar to the MAC-CEs described above.
  • the reference signals can be triggered in bursts over a number of time units, such as slots.
  • the control information can include periodicity information, repetition information, duration, or a time window, each of which can be used to configure repetition of the triggering of reference signals.
  • This example describes a method for TB processing over multiple slots.
  • the UCI information can be multiplexed on PUSCH.
  • the timeline for UCI multiplexing is based on the first slot, overlapped slot (s) , or any slot of TBoMS PUSCH.
  • the timeline for UCI multiplexing is defined in clause 9.2.5 of TS 38.213. The following methods can be considered.
  • Option 1 The timeline is based on the first slot of TBoMS PUSCH.
  • Option 2 The timeline is based on any one or more of the overlapped slot (s) of TBoMS PUSCH.
  • Option 3 The timeline is based on one or more slots of TBoMS PUSCH.
  • FIG. 15 shows an example PUCCH transmission overlapping with a TBoMS PUSCH.
  • the PUCCH transmission is overlapped with slot 2 and slot 3 of TBoMS PUSCH.
  • the timeline for UCI multiplexing could be based on slot 1, slot 2, slot 3, slot 4 or any combination of these slots.
  • the timeline for UCI multiplexing based on one slot means the timeline condition is determined based on the first symbol of PUSCH within the slot.
  • the timeline for UCI multiplexing based on more than one slots means the timeline condition is determined based in the first symbol of PUSCH within the more than one slots.
  • the time domain resource determination of TBoMS PUSCH is based on PUSCH repetition Type B like time domain resource assignment (TDRA) . Similar methods to the above options could be reused to determine timeline conditions of UCI multiplexing. In this case, the time resource granularity needs to be changed from slot (s) to transmission occasions (TOs) .
  • the TO (s) are nominal TO (s) . In some embodiments, the TO (s) are actual TO (s) .
  • slot (s) of TBoMS PUSCH can be used for UCI multiplexing.
  • Option 1 The UCI could be multiplexed on the first slot of TBoMS PUSCH.
  • the UCI could be multiplexed on the overlapped slot (s) of TBoMS PUSCH.
  • the UCI could be multiplexed on any one or more slot (s) within the overlapped slot (s) of TBoMS PUSCH.
  • the UCI could be multiplexed on any one or multiple slots of TBoMS PUSCH
  • FIG. 16 shows an example of PUCCH and TBoMS PUSCH overlapping within one slot.
  • FIG. 17 shows an example of PUCCH and TBoMS PUSCH overlapping within multiple slots.
  • TBoMS is enabled, and a UE transmits a PUCCH which is overlapped with one or more slot (s) within multiple slots for TBoMS PUSCH.
  • the UCI could be multiplexed on slot 1, slot 2, slot 3, ⁇ slot 2, slot 3 ⁇ , or any combination of ⁇ slot 1, slot 2 , slot 3, slot 4 ⁇ .
  • the UCI could be multiplexed on slots 2, slot 3, ⁇ slot 2 , slot 3 ⁇ , or any combination of ⁇ slot 2, slot 3, slot 4 ⁇ . If the timeline for UCI multiplexing on TBoMS PUSCH is not satisfied based on slot 2 but is satisfied based on slot 3, then the UCI could be multiplexed on slot 3, slot 4, or ⁇ slot 3, slot 4 ⁇ .
  • FIG. 18 shows an example overlap scenario. Furthermore, when the time domain resource determination of TBoMS PUSCH is based on PUSCH repetition Type B like TDRA , and the TBoMS PUSCH includes multiple PUSCH Type B like transmission occasions, as shown in FIG. 18, UCI could be multiplexed on A Rep1, A Rep 3, A Rep 4, ⁇ A Rep 3, A Rep 4 ⁇ , or any TOs of ⁇ A Rep1, A Rep2, A Rep3, A Rep 4, A Rep 5 ⁇ . “A Rep” is an actual repetition transmission, and “N Rep” is a nominal repetition transmission.
  • FIG. 19 shows an example overlap scenario where PUCCH and TBoMS PUSCH are overlapped within multiple actual TOs.
  • TBoMS is enabled, and a UE transmits more than one PUCCHs which are overlapped with one or more slots within multiple slots for TBoMS PUSCH, as shown in FIG. 19. If the timeline for both UCI on PUCCH 1 (UCI 1) and PUCCH 2 (UCI 2) multiplexing on TBoMS PUSCH is satisfied based on slot 1, then concatenate UCI1 and UCI2 together and multiplex on slot 1 or slot 2 or any slots within ⁇ slot 1, slot 2, slot 3, slot 4 ⁇ .
  • UCI 1 UCI 1
  • UCI 2 PUCCH 2
  • the timeline for both UCI 1 and UCI 2 multiplexing on TBoMS PUSCH is not satisfied based on slot 1 and it’s satisfied based on slot 2, then concatenate UCI 1 and UCI 2 together and multiplexing on slot 2 or any slots within ⁇ slot 1, slot 2, slot 3, slot 4 ⁇ .
  • the timeline is satisfied based on slot 1 if the timeline is satisfied considering the first symbol of slot 1 or the first symbol of all slots for TBoMS.
  • FIG. 20 shows an example scenario where multiple PUCCHs and TBoMS PUSCH are overlapped within multiple actual TOs.
  • the time domain resource determination of TBoMS PUSCH is based on PUSCH repetition Type B like TDRA and the TBoMS PUSCH includes multiple PUSCH Type B like transmission occasions. If the timeline for both UCI on PUCCH 1 (UCI 1) and PUCCH 2 (UCI 2) multiplexing on TBoMS PUSCH is satisfied based on A Rep 1, then concatenate UCI1 and UCI2 together and multiplexing on A Rep 1 or A Rep 2 or any actual TOs within ⁇ A Rep 1, A Rep 2, A Rep3, A Rep 4, A Rep 5 ⁇ .
  • UCI 1 UCI 1
  • UCI 2 PUCCH 2
  • the slot (TO) for UCI multiplexing is the first slot (TO) of TBoMS PUSCH that includes DMRS symbols. In some embodiments, the slot (TO) for UCI multiplexing is the first overlapped slot (TO) of TBoMS PUSCH thay includes DMRS symbols. In some embodiments, the slots (TOs) for UCI multiplexing is any single slot of TBoMS PUSCH that includes DMRS symbols. In some embodiments, the slots (TOs) for UCI multiplexing are any multiple slots (TOs) of TBoMS PUSCH and the first slot (TO) within the slots (TOs) which include DMRS symbols.
  • the UCI information can be multiplexed on TBoMS PUSCH.
  • the number of coded modulation symbols for each layer of UCI information can be determined, where, the UCI information includes at least one of: HARQ-ACK, CSI part 1, CSI part 2, CG-UCI, HARQ-ACK, or CG-UCI. Take HARQ-ACK multiplexing on PUSCH as an example.
  • Q′ ACK the number of coded modulation symbols per layer for HARQ-ACK transmission, denoted as Q′ ACK , is determined as follows:
  • ⁇ O ACK is the number of HARQ-ACK bits.
  • L ACK 11; otherwise L ACK is the number of CRC bits for HARQ-ACK determined according to Clause 6.3.1.2.1.
  • ⁇ C UL-SCH is the number of code blocks for UL-SCH of the PUSCH transmission.
  • K r 0; otherwise, K r is the r-th code block size for UL-SCH of the PUSCH transmission.
  • ⁇ is the scheduled bandwidth of the PUSCH transmission, expressed as a number of subcarriers.
  • ⁇ is the number of subcarriers in OFDM symbol l that carries PTRS, in the PUSCH transmission.
  • ⁇ is the number of resource elements that can be used for transmission of UCI in OFDM symbol l, for in the PUSCH transmission, and is the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • ⁇ ⁇ is configured by higher layer parameter scaling.
  • ⁇ l 0 is the symbol index of the first OFDM symbol that does not carry DMRS of the PUSCH, after the first DMRS symbol (s) , in the PUSCH transmission.
  • the number of coded modulation symbols for each layer of UCI information should be determined. The following options can be considered.
  • C UL-SCH is the number of code blocks for UL-SCH of the PUSCH transmission.
  • For is the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • For is redefined as the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS.
  • the one or more slots of the PUSCH are the slot (s) overlapping with PUCCH.
  • for is redefined as the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • C UL-SCH is the number of code blocks in one or more slots of the PUSCH for UL-SCH of the PUSCH transmission.
  • K r is the r-th code block size for UL-SCH of the PUSCH transmission.
  • For is redefined as the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS; In some embodiments, for is redefined as the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS. In some embodiments, the one or more slots of the PUSCH is the slot (s) overlapping with PUCCH. In some embodiments, for is redefined as the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • C UL-SCH is the number of code blocks for UL-SCH of the PUSCH transmission.
  • C UL-SCH should be multiplied by a factor k , where k could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, k is less than or equal to 1.
  • k is less than or equal to 1.
  • For is the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS.
  • should be multiplied a scaling factor K and K could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, K is greater than or equal to 1.
  • For is redefined as the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS.
  • the one or more slots of the PUSCH are the slot (s) overlapping with PUCCH.
  • for is redefined as the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • C UL-SCH is the number of code blocks in one or more slots for UL-SCH of the PUSCH transmission
  • K r is the r-th code block size for UL-SCH of the PUSCH transmission.
  • C UL-SCH should be multiplied by a factor K , and K could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, K is greater than or equal to 1.
  • K is greater than or equal to 1.
  • For is the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • should be multiplied a scaling factor k should be multiplied a scaling factor k, and k could be configured by RRC signaling or indicated by DCI or combined coding with TDRA.
  • k is less than or equal to 1.
  • For is redefined as the total number of OFDM symbols in one or more slots of the PUSCH, including all OFDM symbols used for DMRS.
  • the one or more slots of the PUSCH is the slot (s) overlapping with PUCCH.
  • for is redefined as the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • the same methods described in the above four options can be reused.
  • the methods to determine the number of OFDM symbols of the within should be reused for within The same methods to determine the number of OFDM symbols of within should be reused for within. In some embodiments, the same methods to determine the OFDM symbols of the within should be reused for both within and
  • the same methods described in the four options above can be reused.
  • the same methods to determine the number of OFDM symbols of the within should be reused for within
  • the same methods to determine the number of OFDM symbols of within should be reused for within
  • the same methods to determine the OFDM symbols of the within should be reused for both within and
  • Q′ ACK the number of coded modulation symbols per layer for HARQ-ACK transmission, denoted as Q′ ACK , is determined as follows:
  • ⁇ is the number of resource elements that can be used for transmission of UCI in OFDM symbol l, for in the PUSCH transmission assuming a nominal repetition without segmentation, and is the total number of OFDM symbols in a nominal repetition of the PUSCH, including all OFDM symbols used for DMRS.
  • ⁇ is the number of resource elements that can be used for transmission of UCI in OFDM symbol l , for in the actual repetition of the PUSCH transmission, and is the total number of OFDM symbols in the actual repetition of the PUSCH transmission, including all OFDM symbols used for DMRS.
  • the number of coded modulation symbols for each layer of UCI information should be determined, where the UCI information includes at least one of HARQ-ACK, CSI part 1, CSI part 2 , CG-UCI, HARQ-ACK, or CG-UCI.
  • the UCI information includes at least one of HARQ-ACK, CSI part 1, CSI part 2 , CG-UCI, HARQ-ACK, or CG-UCI.
  • the following options should be considered.
  • C UL-SCH is the number of code blocks for UL-SCH of the PUSCH transmission.
  • the PUSCH transmission is a nominal PUSCH transmission.
  • the PUSCH transmission is an actual PUSCH transmission.
  • For is the total number of OFDM symbols of the nominal PUSCH, including all OFDM symbols used for DMRS;
  • for is total OFDM symbols of one or more actual TOs within multiple actual TOs for TB processing.
  • the one or more actual TOs of the PUSCH is the TO (s) overlapping with PUCCH.
  • C UL-SCH is the number of code blocks in one or more TOs of the PUSCH for UL-SCH of the PUSCH transmission.
  • K r is the r-th code block size for UL-SCH of the PUSCH transmission.
  • the PUSCH transmission is a nominal PUSCH transmission.
  • the PUSCH transmission is an actual PUSCH transmission.
  • For is redefined as the total number of OFDM symbols in one or more nominal TOs of the PUSCH, including all OFDM symbols used for DMRS.
  • for is total OFDM symbols of one or more actual TOs within multiple actual TOs for TB processing.
  • the one or more actual TOs of the PUSCH is the TO (s) overlapping with PUCCH. Alternatively, can be the total OFDM symbols of all actual TOs within multiple actual TOs for TB processing PUSCH.
  • C UL-SCH is the number of code blocks for UL-SCH of the PUSCH transmission.
  • C UL-SCH should be multiplied a factor k , and k could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, k is less than or equal to 1.
  • the PUSCH transmission is a nominal PUSCH transmission.
  • the PUSCH transmission is an actual PUSCH transmission. For is redefined as the total number of OFDM symbols in one or more nominal TOs of the PUSCH, including all OFDM symbols used for DMRS.
  • K should be multiplied a scaling factor K, and K could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, K is greater than or equal to 1.
  • K is greater than or equal to 1.
  • the one or more actual TOs of the PUSCH are the TO (s) overlapping with PUCCH.
  • C UL-SCH is the number of code blocks in one or more TOs for UL-SCH of the PUSCH transmission
  • K r is the r-th code block size for UL-SCH of the PUSCH transmission.
  • C UL-SCH should be multiplied a factor K , and K could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, K is greater than or equal to 1.
  • the PUSCH transmission is a nominal PUSCH transmission.
  • the PUSCH transmission is an actual PUSCH transmission. For is redefined as the total number of OFDM symbols of the PUSCH, including all OFDM symbols used for DMRS.
  • k should be multiplied a scaling factor k, and k could be configured by RRC signaling or indicated by DCI or combined coding with TDRA. In this case, k is less than or equal to 1.
  • k is less than or equal to 1.
  • the one or more actual TOs of the PUSCH is the TO(s) overlapping with PUCCH.
  • one option is to use UL RAR grant scheduling Msg3. More specifically, the repetition factor can be included in the TDRA table, and the 4-bit ‘PUSCH time resource allocation’ bit filed can be used for indicating one row of the TDRA table.
  • the addition information included in a TDRA table a 4-bit indication may not be flexible enough.
  • One way to solve this issue is to additionally use the one reserved bit ‘R’ in MAR RAR for repetition factor indication. That is, one bit in MAR RAR and the 4-bit ‘PUSCH time resource allocation’ in UL RAR grant are used for repetition factor indication.
  • there are up to 64 rows in the TDRA table and up to 5 bits are jointly used to indicate of one row of the TDRA table.
  • MAC RAR can be redesigned. In some embodiments, there can be no reserved bit in the redesigned MAC RAR.
  • the timing advance command bit filed in MAC RAR can start from the first bit of the MAC RAR.
  • FIG. 21 shows an example MAC RAR.
  • two coverage levels are defined, and each coverage level corresponds to a set of repetition factors.
  • the one reserved bit ‘R’ in MAR RAR can be used to indicate a coverage level.
  • a ‘PUSCH time resource allocation’ bit or other bit filed in RAR UL grant can be used to indicate one row of the TDRA table, which includes a set of repetition factors.
  • JCE joint channel estimation
  • time domain window was introduced to facilitate further discussion, during which a UE is expected to maintain power consistency and phase continuity among PUSCH transmissions, subject to power consistency and phase continuity requirements.
  • Option 1 The 1-bit frequency hopping (FH) flag in DCI can be used to indicate the length of time domain window with JCE.
  • the length of time domain window can be 2/4 or 4/8 or another length, based on RRC configuration. For example, if RRC is configured as 2/4, the 1 bit FH flag can be used to indicate that the length of the time domain window is 2 or 4.
  • Option 1-2 The length of the time domain window is fixed to 2/4 or 4/8 or another length. For example, if the time domain window is fixed to 4/8, the 1 bit FH flag can be used to indicate the length of time domain window is 4 or 8.
  • the 1-bit FH flag in DCI can be used to indicate the configuration of time domain window using JCE.
  • RRC can be configured with two sets of time domain window configurations, and the time domain window configuration can includes at least one of following: the length of the time domain window or DMRS less pattern.
  • a DMRS less pattern means the DMRS location/granularity in repetition slots is less than a normal DMRS configuration.
  • a DMRS less pattern can be equally spaced among PUSCH repetition transmissions.
  • the DMRS less pattern is the DMRS only located in parts of repetition slots, and the DMRS less pattern is fixed or based on RRC configuration.
  • RRC is configured with one set of time domain windows, with the length of time domain window set as 8.
  • the DMRS less pattern can be 1/3/5/7, meaning DMRS is located only in odd repetition (1/3/5/7) , and the even repetitions do not have DMRS.
  • the 1 bit FH flag in DCI can be used to indicate whether to use DMRS less with JCE, and the DMRS less pattern can be fixed or based on the RRC configuration.
  • Some embodiments may preferably incorporate the following solutions as described herein.
  • a wireless device for activating a serving cell as described herein (e.g., as described in Example 1) :
  • a method of wireless communication comprising: receiving, at a wireless device from a network device, control information (1402) ; triggering a first number of reference signals corresponding to a first number of serving cells based on the control information (1404) ; and activating a second number of secondary cells based on the control information, wherein the first number is greater than or equal the second number (1406) .
  • serving cells comprise primary cells (PCells) and secondary cells (SCells) .
  • the wireless device is configured to operate in a component carrier (CC) aggregated mode via carrier aggregation (CA) , and the first number is less than or equal to a total number of CCs serving the wireless device.
  • CC component carrier
  • CA carrier aggregation
  • control information includes a MAC control element (MAC-CE) (e.g., as described in Example 1 and FIGS 4-10) .
  • MAC-CE MAC control element
  • MAC-CE includes a field indicating whether an aperiodic non-zero-power (NZP) channel state information reference signal (CSI-RS) resource set is activated (e.g., as described in FIG. 12) .
  • NZP non-zero-power
  • CSI-RS channel state information reference signal
  • the MAC-CE includes a serving cell list associated with a plurality of serving cells (e.g., as described in FIG. 6) .
  • the method of solution 5 further comprising: configuring a trigger offset, the trigger offset including a starting position at a starting slot prior to the triggering the first number of reference signals (e.g., as described in FIG. 8) .
  • the method of solution 13 further comprising: transmitting an acknowledgment corresponding to a MAC-CE PDSCH at the starting slot or one, three, or four, slots prior to the starting slot.
  • control information includes downlink control information (DCI) .
  • DCI downlink control information
  • DCI further indicates the first number of serving cells in at least one of the following fields: an SCell dormancy indication field or a Carrier Indicator Field (CIF) .
  • SCell dormancy indication field or a Carrier Indicator Field (CIF) .
  • CIF Carrier Indicator Field
  • the solutions listed below may be used by a wireless device for configuring repetition information as described herein (e.g., as described in Example 2 and FIG. 11-13) .
  • triggering the first number of reference signals comprises: triggering the reference signals over one or more time domain units, wherein the time domain units are slots.
  • the configuration information includes a time window; and the triggering the reference signals over the one or more time domain units comprises repeatedly triggering the reference signals during the time window.
  • the configuration information further includes repetition information
  • the triggering the reference signals over the one or more time domain units further comprises: repeatedly triggering the reference signals during a number of additional time windows, wherein the number of additional time windows is based on the repetition information.
  • the configuration information includes a first time offset
  • the triggering the reference signals over the one or more time domain units comprises: triggering a first reference signal burst, and triggering a second reference signal burst, wherein a first amount of time between triggering the first and second reference signal bursts is based on the first time offset.
  • the triggering the reference signals over the one or more time domain units further comprises: triggering the third reference signal burst, and triggering the fourth reference signal burst, wherein a second amount of time between triggering the second and third reference signal bursts or slots is based on the second time offset.
  • the configuration information further includes a repetition number K indicating a number of repetitions of the duration.
  • the configuration information further includes a repetition number K indicating a number of beams carrying the reference signals, and the reference signals are configured for beam sweeping based on the repetition number.
  • a reference signal of the first number of reference signals is indicated as a Quasi Co-location (QCL) source for a synchronization signal block (SSB) .
  • QCL Quasi Co-location
  • SSB synchronization signal block
  • the solutions listed below may be used by a network device for activating a serving cell as described herein:
  • a method of wireless communication comprising: transmitting, to a wireless device from a network device, control information; and transmitting a first number of reference signals corresponding to a first number of serving cells based on the control information, wherein the control information enables the wireless device to activate a second number of secondary cells based on the control information, and wherein the first number is greater than or equal the second number.
  • the serving cells comprise primary cells (PCells) and secondary cells (SCells) .
  • the wireless device is configured to operate in a component carrier (CC) aggregated mode via carrier aggregation (CA) , and the first number is less than or equal to a total number of CCs serving the wireless device.
  • CC component carrier
  • CA carrier aggregation
  • control information includes a MAC control element (MAC-CE) .
  • MAC-CE MAC control element
  • control information includes downlink control information (DCI) .
  • DCI downlink control information
  • the DCI indicates the first number of serving cells
  • a subset of the first number of serving cells is in an activated state prior to the activating the second number of secondary cells
  • the second number of secondary cells plus the number of serving cells in the subset is equal to the first number of serving cells or the first number of serving cells minus one.
  • DCI further indicates the first number of serving cells in at least one of the following fields: an SCell dormancy indication field or a Carrier Indicator Field (CIF) .
  • SCell dormancy indication field or a Carrier Indicator Field (CIF) .
  • CIF Carrier Indicator Field
  • control information enables the wireless device to deactivate a third number of serving cells based on the control information.
  • the solutions listed below may be used by a network device for configuring repetition information as described herein.
  • the transmitting the first number of reference signals comprises: transmitting the reference signals over one or more time domain units, wherein the time domain units are slots.
  • the configuration information includes periodicity information
  • the reference signals are transmitted periodically according to the periodicity information.
  • the configuration information includes repetition information
  • the reference signals are transmitted a number of times based on the repetition information.
  • the configuration information includes a time window; and the transmitting the reference signals over the one or more time domain units comprises repeatedly transmitting the reference signals during the time window.
  • the configuration information further includes repetition information
  • the transmitting the reference signals over the one or more time domain units further comprises: repeatedly transmitting the reference signals during a number of additional time windows, wherein the number of additional time windows is based on the repetition information.
  • the transmitting the reference signals over the one or more time domain units comprises: transmitting a first reference signal burst, and transmitting a second reference signal burst, wherein a first amount of time between transmitting the first and second reference signal bursts is based on the first time offset.
  • the transmitting the reference signals over the one or more time domain units further comprises: transmitting the third reference signal burst, and transmitting the fourth reference signal burst, wherein a second amount of time between transmitting the second and third reference signal bursts or slots is based on the second time offset.
  • the configuration information further includes a repetition number K indicating a number of repetitions of the duration.
  • the configuration information further includes a repetition number K indicating a number of beams carrying the reference signals, and the reference signals are configured for beam sweeping based on the repetition number.
  • a reference signal of the first number of reference signals is indicated as a Quasi Co-location (QCL) source for a synchronization signal block (SSB) .
  • QCL Quasi Co-location
  • SSB synchronization signal block
  • solutions listed below may an apparatus or computer readable medium for implementing UE configuration as described herein.
  • a wireless apparatus comprising a processor configured to implement the method of any of solutions 1 to 72.
  • a computer readable medium having code stored thereon, the code when executed by a processor, causing the processor to implement a method recited in any of solutions 1 to 72.
  • FIG. 22 is a block diagram representation of a portion of an apparatus, in accordance with some embodiments of the presently disclosed technology.
  • An apparatus 2205 such as a network device or a base station or a wireless device (or UE) , can include processor electronics 2210 such as a microprocessor that implements one or more of the techniques presented in this document.
  • the apparatus 2205 can include transceiver electronics 2215 to send and/or receive wireless signals over one or more communication interfaces such as antenna (s) 2220.
  • the apparatus 2205 can include other communication interfaces for transmitting and receiving data.
  • Apparatus 2205 can include one or more memories (not explicitly shown) configured to store information such as data and/or instructions.
  • the processor electronics 2210 can include at least a portion of the transceiver electronics 2215. In some embodiments, at least some of the disclosed techniques, modules or functions are implemented using the apparatus 2205.
  • a computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media.
  • program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
  • Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
  • a hardware circuit implementation can include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board.
  • the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and/or as a Field Programmable Gate Array (FPGA) device.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • DSP digital signal processor
  • the various components or sub-components within each module may be implemented in software, hardware or firmware.
  • the connectivity between the modules and/or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.

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Abstract

L'invention concerne des systèmes, un appareil et des procédés de communication sans fil et, plus particulièrement, des techniques associées à l'activation de cellule de desserte et à l'amélioration de la couverture. Un exemple de procédé de communication sans fil comprend la réception, au niveau d'un dispositif sans fil à partir d'un dispositif de réseau, d'informations de commande, le déclenchement d'un premier nombre de signaux de référence correspondant à un premier nombre de cellules de desserte sur la base des informations de commande, et l'activation d'un second nombre de cellules secondaires sur la base des informations de commande, le premier nombre étant supérieur ou égal au second nombre.
PCT/CN2021/085719 2021-04-06 2021-04-06 Procédés d'activation de cellule et d'amélioration de la couverture WO2022213284A1 (fr)

Priority Applications (2)

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PCT/CN2021/085719 WO2022213284A1 (fr) 2021-04-06 2021-04-06 Procédés d'activation de cellule et d'amélioration de la couverture
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