US20230422311A1 - Method and apparatus for random access in repetition mode in wireless mobile communication system - Google Patents
Method and apparatus for random access in repetition mode in wireless mobile communication system Download PDFInfo
- Publication number
- US20230422311A1 US20230422311A1 US18/241,993 US202318241993A US2023422311A1 US 20230422311 A1 US20230422311 A1 US 20230422311A1 US 202318241993 A US202318241993 A US 202318241993A US 2023422311 A1 US2023422311 A1 US 2023422311A1
- Authority
- US
- United States
- Prior art keywords
- uplink
- configuration parameter
- preamble
- parameter
- random access
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000010295 mobile communication Methods 0.000 title description 4
- 230000005540 biological transmission Effects 0.000 claims abstract description 52
- 230000004044 response Effects 0.000 claims description 8
- 230000000153 supplemental effect Effects 0.000 claims 1
- 235000019527 sweetened beverage Nutrition 0.000 description 27
- 238000010586 diagram Methods 0.000 description 17
- 101150096310 SIB1 gene Proteins 0.000 description 15
- 238000007726 management method Methods 0.000 description 10
- 230000011664 signaling Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000013468 resource allocation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 238000013507 mapping Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- 102100022734 Acyl carrier protein, mitochondrial Human genes 0.000 description 4
- 101000678845 Homo sapiens Acyl carrier protein, mitochondrial Proteins 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 101001055444 Homo sapiens Mediator of RNA polymerase II transcription subunit 20 Proteins 0.000 description 3
- 102100026165 Mediator of RNA polymerase II transcription subunit 20 Human genes 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 108091005487 SCARB1 Proteins 0.000 description 2
- 101150039363 SIB2 gene Proteins 0.000 description 2
- 102100037118 Scavenger receptor class B member 1 Human genes 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012384 transportation and delivery Methods 0.000 description 2
- 101100518633 Caenorhabditis elegans dpy-18 gene Proteins 0.000 description 1
- 101100289995 Caenorhabditis elegans mac-1 gene Proteins 0.000 description 1
- 101100347993 Caenorhabditis elegans nas-1 gene Proteins 0.000 description 1
- 101100150275 Caenorhabditis elegans srb-3 gene Proteins 0.000 description 1
- 101000575066 Homo sapiens Mediator of RNA polymerase II transcription subunit 17 Proteins 0.000 description 1
- 102100025530 Mediator of RNA polymerase II transcription subunit 17 Human genes 0.000 description 1
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 description 1
- 101150071746 Pbsn gene Proteins 0.000 description 1
- 101150096622 Smr2 gene Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 101150074693 rrc-1 gene Proteins 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
Definitions
- 5G system To meet the increasing demand for wireless data traffic since the commercialization of 4th generation (4G) communication systems, the 5th generation (5G) system is being developed.
- 5G system introduced millimeter wave (mmW) frequency bands (e.g. 60 GHz bands).
- mmW millimeter wave
- various techniques are introduced such as beamforming, massive multiple-input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna.
- base station is divided into a central unit and plurality of distribute units for better scalability.
- 5G communication system targets supporting higher data rate and smaller latency. Since high frequency band is utilized for 5G radio, uplink coverage problems can occur. To mitigate the uplink coverage problem, enhancements are required.
- a method of a terminal in mobile communication system comprises receiving a SIB 1, selecting a normal uplink or a supplementary uplink based on rsrp-ThresholdSSB-SUL, selecting message 3 repetition mode based on a rsrp-Threshold2 of the supplementary uplink if the supplementary uplink is selected, selecting a SSB based on a rsrp-ThresholdSSB in the fourth random access related information if message 3 repetition mode is selected, selecting a preamble group based on a preamble reception target power in a first information element of the fourth random access related information and a first offset in a second information element of the fourth random access related information, determining transmission power of a preamble based on the preamble reception target power and
- FIG. 1 A is a diagram illustrating the architecture of an 5G system and a NG-RAN to which the disclosure may be applied;
- FIG. 1 B is a diagram illustrating a wireless protocol architecture in an 5G system to which the disclosure may be applied;
- FIG. 2 A is a diagram illustrating an example of a bandwidth part.
- FIG. 4 A is a flow diagram illustrating an operation of a terminal.
- FIG. 4 B is a flow diagram illustrating an operation of a base station.
- FIG. 5 A is a block diagram illustrating the internal structure of a UE to which the disclosure is applied.
- FIG. 5 B is a block diagram illustrating the configuration of a base station according to the disclosure.
- UL MAC SDUs from this logical channel can be mapped to any configured numerology. allowed- List of allowed serving cells for the corresponding logical channel. If ServingCells present, UL MAC SDUs from this logical channel can only be mapped to the serving cells indicated in this list. Otherwise, UL MAC SDUs from this logical channel can be mapped to any configured serving cell of this cell group. Carrier center frequency of the cell. frequency Cell combination of downlink and optionally uplink resources. The linking between the carrier frequency of the downlink resources and the carrier frequency of the uplink resources is indicated in the system information transmitted on the downlink resources. Cell in dual connectivity, a group of serving cells associated with either the Group MeNB or the SeNB.
- identity gNB node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
- Handover procedure that changes the serving cell of a UE in RRC CONNECTED.
- element information element A structural element containing single or multiple fields is referred as element information element.
- the Length field in MAC subheader indicates the length of the corresponding MAC SDU or of the corresponding MAC CE LCID 6-bit logical channel identity in MAC subheader to denote which logical channel traffic or which MAC CE is included in the MAC subPDU MAC-I Message Authentication Code - Integrity. 16 bit or 32 bit bit string calculated by NR Integrity Algorithm based on the security key and various fresh inputs Logical a logical path between an RLC entity and a MAC entity.
- LogicalChannelConfig is used to configure the logical channel Channel- parameters. It includes priority, prioritisedBitRate, allowedServingCells, Config allowedSCS-List, maxPUSCH-Duration, logicalChannelGroup, allowedCG- List etc logical- ID of the logical channel group, as specified in TS 38.321, which the logical Channel- channel belongs to Group MAC CE Control Element generated by a MAC entity.
- PDCP NR NR radio access PCell SpCell of a master cell group.
- PDCP The process triggered upon upper layer request. It includes the initialization entity of state variables, reset of header compression and manipulating of stored reestablishment PDCP SDUs and PDCP PDUs. The details can be found in 5.1.2 of 38.323 PDCP The process triggered upon upper layer request. When triggered, suspend transmitting PDCP entity set TX_NEXT to the initial value and discard all stored PDCP PDUs.
- the term ‘serving cells’ is used to denote the set of cells comprising of the Special Cell(s) and all secondary cells.
- SpCell primary cell of a master or secondary cell group.
- Special Cell refers to the PCell of Cell the MCG or the PSCell of the SCG, otherwise the term Special Cell refers to the PCell.
- SRB Signalling Radio Bearers SRBs
- RBs Radio Bearers
- FIG. 1 A is a diagram illustrating the architecture of a 5G system and a NG-RAN to which the disclosure may be applied.
- 5G system consists of NG-RAN 1 a - 01 and 5GC 1 a - 02 .
- An NG-RAN node is either:
- a gNB 1 a - 05 or 1 a - 06 or an ng-eNBs 1 a - 03 or 1 a - 04 hosts the functions listed below.
- Radio Resource Management such as Radio Bearer Control, Radio Admission Control, Connection Mobility Control, Dynamic allocation of resources to UEs in uplink, downlink and sidelink(scheduling); and
- IP and Ethernet header compression IP and Ethernet header compression, uplink data decompression and encryption of user data stream
- the AMF 1 a - 07 hosts functions such as NAS signaling, NAS signaling security, AS security control, SMF selection, Authentication, Mobility management and positioning management.
- the UPF 1 a - 08 hosts functions such as packet routing and forwarding, transport level packet marking in the uplink, QoS handling and the downlink, mobility anchoring for mobility etc.
- FIG. 1 B is a diagram illustrating a wireless protocol architecture in a 5G system to which the disclosure may be applied.
- Each protocol sublayer performs functions related to the operations listed in Table 3.
- RLC Transfer of upper layer PDUs Error Correction through ARQ, Segmentation and re-segmentation of RLC SDUs, Reassembly of SDU, RLC re-establishment etc.
- MAC Mapping between logical channels and transport channels Multiplexing/demultiplexing of MAC SDUs belonging to one or different logical channels into/from transport blocks (TB) delivered to/from the physical layer on transport channels, Scheduling information reporting, Priority handling between UEs, Priority handling between logical channels of one UE etc.
- PHY Channel coding Physical-layer hybrid-ARQ processing, Rate matching, Scrambling, Modulation, Layer mapping, Downlink Control Information, Uplink Control Information etc.
- a reduced capability UE or RedCap UE has lower performance than a general UE and is used in limited scenarios such as IOT. Compared to a typical terminal having a bandwidth of 100 MHz, a transmission/reception speed of several Gbps, and four or more Rx processing units (Rx branches), RedCap terminals have a bandwidth of 20 MHz, a transmission/reception speed of several tens of Mbps, and two or less Rx processing units.
- the present invention provides a method and apparatus for a RedCap UE to access a cell supporting RedCap, receive system information, and perform necessary operations.
- the terminal applies search space 0 (Search Space 0, hereinafter SS #0) and control resource set 0 (Control Resource Set 0, hereinafter CORESET #0) in the initial bandwidth part (IBWP) to obtain system information.
- search space 0 Search Space 0, hereinafter SS #0
- control resource set 0 Control Resource Set 0, hereinafter CORESET #0
- IBWP initial bandwidth part
- FIG. 2 A is a diagram illustrating an example of a bandwidth part.
- the receive and transmit bandwidth of a UE need not be as large as the bandwidth of the cell and can be adjusted: the width can be ordered to change (e.g. to shrink during period of low activity to save power); the location can move in the frequency domain (e.g. to increase scheduling flexibility); and the subcarrier spacing can be ordered to change (e.g. to allow different services).
- a subset of the total cell bandwidth of a cell is referred to as a Bandwidth Part (BWP) and BA is achieved by configuring the UE with BWP(s) and telling the UE which of the configured BWPs is currently the active one.
- BWP Bandwidth Part
- FIG. 2 A describes a scenario where 3 different BWPs are configured:
- FIG. 2 B is a diagram illustrating an example of a search space and a control resource set.
- a plurality of SSs may be configured in one BWP.
- the UE monitors PDCCH candidates according to the SS configuration of the currently activated BWP.
- One SS consists of an SS identifier, a CORESET identifier indicating the associated CORESET, the period and offset of the slot to be monitored, the slot unit duration, the symbol to be monitored in the slot, the SS type, and the like.
- the information may be explicitly and individually configured or may be configured by a predetermined index related to predetermined values.
- One CORESET consists of a CORESET identifier, frequency domain resource information, symbol unit duration, TCI status information, and the like.
- CORESET provides frequency domain information to be monitored by the UE
- SS provides time domain information to be monitored by the UE.
- CORESET #0 ( 2 b - 06 ) and SS #0 ( 2 b - 07 ) and information constituting another CORESET for example, CORESET #n ( 2 b - 11 ) and SS #m ( 2 b - 13 ) may be included.
- the terminal receives necessary information from the base station before the terminal enters the RRC_CONNECTED state, such as SIB2 reception, paging reception, and random access response message reception by using the CORESETs and SSs configured in SIB1.
- CORESET #0 ( 2 b - 02 ) configured in MIB and CORESET #0 ( 2 b - 06 ) configured in SIB1 may be different from each other, and the former is called a first CORESET #0 and the latter is called a second CORESET #0.
- SS #0 ( 2 b - 03 ) configured in MIB and SS #0 ( 2 b - 07 ) configured in SIB1 may be different from each other, and the former is referred to as a first SS #0 and the latter is referred to as a second SS #0.
- SS #0 and CORESET #0 configured for the RedCap terminal are referred to as a third SS #0 and a third CORESET #0.
- the first SS #0, the second SS #0, and the third SS #0 may be the same as or different from each other.
- the first CORESET #0, the second CORESET #0, and the third CORESET #0 may be the same as or different from each other.
- SS #0 and CORESET #0 are each indicated by a 4-bit index.
- the 4-bit index indicates a configuration predetermined in the standard specification. Except for SS #0 and CORESET #0, the detailed configuration of the remaining SS and CORESET is indicated by each individual information element.
- additional BWPs may be configured for the UE.
- FIG. 3 illustrates the operations of UE and GNB for random access procedure.
- UE performs cell selection and camps on a suitable cell.
- UE receives SIB1 in the suitable cell.
- GNB includes various information in the SIB1.
- SIB13 contains information relevant when evaluating if a UE is allowed to access a cell and defines the scheduling of other system information. It also contains radio resource configuration information that is common for all UEs. It also contains radio resource configuration information that is common for feature combinations.
- RACH-ConfigCommon is used to specify the cell specific random-access parameters and includes the following IEs.
- PRACH-ConfigurationIndex An index indicating preamble format, SFN, subframe number, starting symbol, PRACH duration for PRACH preamble. It defines the time pattern of PRACH occasions and a preamble format which can be transmitted in the PRACH occasions.
- Msg1-FDM The number of PRACH transmission occasions FDMed in one time instance.
- Msg1-FrequencyStart Offset of lowest PRACH transmission occasion in frequency domain with respective to PRB 0.
- PreambleReceivedTargetPower The target power level at the network receiver side. It is used to calculate preamble transmission power.
- MessagePowerOffsetGroupB Threshold for preamble selection.
- RA-ContentionResolutionTimer The initial value for the contention resolution timer.
- RA-Msg3SizeGroupA Transport Blocks size threshold in bits below which the UE shall use a contention-based RA preamble of group A.
- the UE selects Msg 3 repetition mode based on this threshold. It can be present in a RACH-ConfigCommon for mode 1 in NUL and a RACH-ConfigCommon for mode 1 in SUL. It is absent in a RACH-ConfigCommon for mode 2 in NUL and a RACH-ConfigCommon for mode 2 in SUL.
- PUSCH-ConfigCommon is used to configure the cell specific PUSCH parameters and includes the following IEs.
- Msg3-DeltaPreamble Power offset between msg3 and RACH preamble transmission.
- PUSCH-TimeDomainAllocationList List of time domain allocations for timing of UL assignment to UL data. This list is used for Mode 1.
- PUSCH-TimeDomainAllocationList2 List of time domain allocations for timing of UL assignment to UL data. This list is used for Mode 2.
- PUSCH-TimeDomainResourceAllocation is used to configure a time domain relation between PDCCH and PUSCH.
- PUSCH-TimeDomainResourceAllocationList contains one or more of such PUSCH-TimeDomainResourceAllocations.
- the network indicates in the UL grant which of the configured time domain allocations the UE shall apply for that UL grant.
- a PUSCH-TimeDomainResourceAllocation is associated with a k2 and startSymbolAndLength. k2 is the distance between PDCCH and PUSCH.
- startSymbolAndLength is an index giving valid combinations of start symbol and length.
- the IE PUSCH-TimeDomainResourceAllocation2 is used to configure a time domain relation between PDCCH and PUSCH.
- PUSCH-TimeDomainResourceAllocationList2 contains one or more of such PUSCH-TimeDomainResourceAllocation2s.
- the network indicates in the UL grant which of the configured time domain allocations the UE shall apply for that UL grant.
- a PUSCH-TimeDomainResourceAllocation2 is associated with a k2, startSymbol, length and numberOfRepetitions.
- startSymbol indicates the index of start symbol for PUSCH.
- length indicates the length allocated for PUSCH.
- numberOfRepetitions is number of repetitions.
- PDCCH-ConfigCommon is used to configure cell specific PDCCH parameters includes following IEs.
- CommonControlResourceSet An additional common control resource set which may be configured and used for any common or UE-specific search space.
- CommonSearchSpaceList A list of additional common search spaces. If the network configures this field, it uses SearchSpaceIds other than 0.
- ControlResourceSetZero Parameters of the common CORESET #0 which can be used in any common or UE-specific search spaces.
- PagingSearchSpace ID of the Search space for paging.
- RA-SearchSpace ID of the Search space for random access procedure.
- SearchSpaceOtherSystemInformation ID of the Search space for other system information, i.e., SIB2 and beyond.
- UE selects, based on rsrp-ThresholdSSB-SUL indicated in the RACH-ConfigCommon for mode 1 of NUL, an uplink where random access procedure is to be performed.
- UE selects the NUL carrier for performing random access procedure.
- UE selects the SUL carrier for performing random access procedure.
- the downlink pathloss reference could be a SSB with the best RSRP among the SSBs of the cell. It could be any SSB of the cell.
- UE could use, in selecting UL carrier, the rsrp-ThresholdSSB-SUL included in the first RACH-ConfigCommon of NUL.
- GNB may set the same values for the rsrp-ThresholdSSB-SULs included in RACH-ConfigCommon for mode 1 of SUL and the rsrp-ThresholdSSB-SUL included in RACH-ConfigCommon for mode 1 of NUL.
- GNB does not include rsrp-ThresholdSSB-SUL in RACH-ConfigCommon for mode 2 of NUL and in RACH-ConfigCommon for mode 2 of SUL.
- UE selects the mode based on the rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL or based on the rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of SUL.
- NUL is selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects the mode 1. Alternatively, if NUL is selected and the average over SS-RSRPs of SSBs is higher than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL, UE selects mode 1.
- NUL is selected and if no SSB with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects the mode 2. Alternatively, if NUL is selected and the average over SS-RSRPs of SSBs is lower than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL, UE selects mode 2.
- UE selects the mode 1.
- SUL is selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of SUL, is available, UE selects the mode 1.
- UE selects mode 1.
- UE selects the mode 2.
- SUL is selected and the average over SS-RSRPs of SSBs is lower than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of SUL, UE selects mode 2.
- SS-RSRP Synchronization Signal-reference signal received power
- UE selects an SSB based on a rsrp-ThresholdSSB.
- NUL and mode 1 are selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdSSB, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 1 of NUL.
- UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 2 of NUL.
- UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 1 of SUL.
- UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 2 of SUL.
- UE selects preamble group based on the random-access IE groups received via SIB1.
- UE select the Random Access Preamble group B.
- UE selects the Random Access Preamble group A.
- UE selects the Random Access Preamble group A.
- Random Access procedure was not initiated for the CCCH logical channel, and If the potential Msg3 size (UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs) is greater than ra-Msg3SizeGroupA, and the pathloss is not less than PCMAX (of the Serving Cell performing the Random Access Procedure)-preambleReceivedTargetPower-msg3-DeltaPreamble-messagePowerOffsetGroupB, UE select the Random Access Preamble group A.
- Msg3 size UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs
- PCMAX of the Serving Cell performing the Random Access Procedure
- UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon for mode 1 of NUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon for mode 1 of NUL.
- UE uses zero.
- UE uses msg3-DeltaPreamble provided in PUSCH-ConfigCommon for mode 1 or NUL.
- UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon for mode 1 of SUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon for mode 1 of SUL.
- UE determines the next available PRACH occasion from the PRACH occasions corresponding to the selected SSB. UE shall select a PRACH occasion randomly with equal probability amongst the consecutive PRACH occasions indicated by PRACH configuration index of RACH-ConfigCommon of the selected mode and the selected uplink.
- UE transmits the selected preamble in the selected PRACH occasion in the selected uplink.
- PREAMBLE_RECEIVED_TARGET_POWER preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER ⁇ 1) ⁇ powerRampingStep+POWER_OFFSET_2STEP_RA.
- UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 1 of NUL.
- UE sets POWER_OFFSET_2STEP_RA to zero.
- UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 1 of NUL.
- DELTA_PREAMBLE is predefined for each preamble format.
- PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 2 of NUL.
- UE sets POWER_OFFSET_2STEP_RA to zero.
- UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 2 of NUL.
- DELTA_PREAMBLE is predefined for each preamble format.
- PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 1 of SUL.
- UE sets POWER_OFFSET_2STEP_RA to zero.
- UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 1 of SUL.
- DELTA_PREAMBLE is predefined for each preamble format.
- PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 2 of SUL.
- UE sets POWER_OFFSET_2STEP_RA to zero.
- UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 2 of SUL.
- DELTA_PREAMBLE is predefined for each preamble format.
- PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- ra-SearchSpace in RACH-ConfigCommon for mode 2 of NUL indicates the searchSpace UE should monitor for RAR reception.
- the MAC subPDU contains a MAC RAR.
- the MAC RAR includes fields like Timing Advance Command, Uplink Grant and Temporary C-RNTI.
- the Timing Advance Command field indicates the index value used to control the amount of timing adjustment that the UE has to apply.
- the size of the Timing Advance Command field is 12 bits.
- the Uplink Grant field indicates the resources to be used on the uplink.
- the size of the UL Grant field is 27 bits.
- the Temporary C-RNTI field indicates the temporary identity that is used by the UE during Random Access.
- the size of the Temporary C-RNTI field is 16 bits.
- Uplink Grant field further includes PUSCH time resource allocation field.
- PUSCH time resource allocation field is 4 bit.
- This field indicates a TimeDomainAllocation of a TimeDomainAllocationList in PUSCH-ConfigCommon if mode 1 is selected (or UE transmitted preambles associated with mode 1) or a TimeDomainAllocation2 of a TimeDomainAllocationList2 in PUSCH-ConfigCommon if mode 2 is selected (or UE transmitted preambles associated with mode 2).
- TimeDomainAllocationList in PUSCH-ConfigCommon for mode 1 of NUL is used to determine time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation indicated by PUSCH time resource allocation field of Uplink Grant.
- TimeDomainAllocationList in PUSCH-ConfigCommon for mode 1 of SUL is used to determine time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation indicated by PUSCH time resource allocation field of Uplink Grant.
- TimeDomainAllocationList2 in PUSCH-ConfigCommon for mode 2 of NUL is used to determine number of repetition and time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation2 indicated by PUSCH time resource allocation field of Uplink Grant.
- TimeDomainAllocationList2 in PUSCH-ConfigCommon for mode 2 of SUL is used to determine number of repetition and time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation2 indicated by PUSCH time resource allocation field of Uplink Grant.
- UE performs Msg 3 transmission according to UL grant in the received RAR.
- UE generates a MAC PDU and triggers a new transmission. If mode 2 is applied and TimeDomainAllocationList2 is used, at most REPETITION_NUMBER ⁇ 1 HARQ retransmission follows within a bundle after the first transmission in the bundle.
- REPETITION_NUMBER is set to the number of repetitions associated with TimeDomainAllocation2 indicated by the uplink grant. Bundling operation relies on the HARQ entity for invoking the same HARQ process for each transmission that is part of the same bundle.
- UE determines the PUSCH transmission power by summing offset 1, offset 2, pathloss and other parameters related with number of PRBs and power control commands.
- Offset 1 is sum of preambleReceivedTargetPower and msg3-DeltaPreamble.
- Offset2 is msg3-Alpha.
- Two instances of msg3-Alpha can be provided: one for NUL and the other for SUL.
- preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 1 in NUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 1 in NUL and msg3-Alpha for NUL are used. If msg3-Alpha for NUL is not provided, offset2 is 1.
- preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 1 in SUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 1 in SUL and msg3-Alpha for SUL are used. If msg3-Alpha for SUL is not provided, offset2 is 1.
- preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 2 in NUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 2 in NUL and msg3-Alpha for NUL are used. If msg3-Alpha for NUL is not provided, offset2 is 1.
- preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 2 in SUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 2 in SUL and msg3-Alpha for SUL are used. If msg3-Alpha for SUL is not provided, offset2 is 1.
- GNB receives the Msg 3 and process RRC message included in Msg 3. If RRC message requesting connection setup, GNB performs call admission control and act upon the result.
- step 4 a - 11 the terminal receives first RACH configuration, first PUSCH configuration, second RACH configuration, second PUSCH configuration, third RACH configuration, third PUSCH configuration, fourth RACH configuration, and fourth PUSCH configuration from the base station.
- step 4 a - 19 the UE randomly selects one preamble among preambles associated with the selected SSB with equal probability.
- step 4 a - 21 the terminal transmits the selected preamble on the selected uplink carrier.
- step 4 a - 27 the terminal transmits message 3 based on the time resource allocation field of the uplink grant included in the random access response message.
- the UE determine the PUSCH transmission power using the preamble reception target power of the second RACH configuration, the message 3 delta preamble of the second PUSCH configuration, and the message 3 alpha for the normal uplink.
- the UE determine the PUSCH transmission power using the preamble reception target power of the third RACH configuration, the message 3 delta preamble of the third PUSCH configuration, and the message 3 alpha for the supplementary uplink.
- the UE determine the PUSCH transmission power using the preamble reception target power of the fourth RACH configuration, the message 3 delta preamble of the fourth PUSCH configuration, and the message 3 alpha for the supplementary uplink.
- FIG. 4 B illustrates the operation of a base station.
- step 4 b - 11 the base station transmits first RACH configuration, first PUSCH configuration, second RACH configuration, second PUSCH configuration, third RACH configuration, third PUSCH configuration, fourth RACH configuration, and fourth PUSCH configuration.
- step 4 b - 17 the base station transmits a random access response message including the uplink transmission resource.
- FIG. 5 A is a block diagram illustrating the internal structure of a UE to which the disclosure is applied.
- the UE includes a controller 5 a - 01 , a storage unit 5 a - 02 , a transceiver 5 a - 03 , a main processor 5 a - 04 and I/O unit 5 a - 05 .
- the main processor 5 a - 04 controls the overall operations other than mobile operation.
- the main processor 5 a - 04 process user input received from I/O unit 5 a - 05 , stores data in the storage unit 5 a - 02 , controls the controller 5 a - 01 for required mobile communication operations and forward user data to I/O unit ( 905 ).
- I/O unit 5 a - 05 consists of equipment for inputting user data and for outputting user data such as a microphone and a screen. I/O unit 5 a - 05 performs inputting and outputting user data based on the main processor's instruction.
- FIG. 5 B is a block diagram illustrating the configuration of a base station according to the disclosure.
- the base station includes a controller 5 b - 01 , a storage unit 5 b - 02 , a transceiver 5 b - 03 and a backhaul interface unit 5 b - 04 .
- the controller 5 b - 01 controls the overall operations of the main base station.
- the controller 5 b - 01 receives/transmits signals through the transceiver 5 b - 03 , or through the backhaul interface unit 5 b - 04 .
- the controller 5 b - 01 records and reads data in the storage unit 5 b - 02 .
- the controller 5 b - 01 may include at least one processor.
- the controller controls transceiver, storage unit and backhaul interface such that base station operation illustrated in FIG. 2 A and FIG. 2 B are performed.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A method for random access is provided. Method for random access includes receiving a SIB 1, selecting a normal uplink or a supplementary uplink based on rsrp-ThresholdSSB-SUL, selecting message 3 repetition mode based on a rsrp-Threshold2 of the supplementary uplink if the supplementary uplink is selected, selecting a SSB based on a rsrp-ThresholdSSB in the fourth random access related information if message 3 repetition mode is selected, selecting a preamble group based on a preamble reception target power in a first information element of the fourth random access related information and a first offset in a second information element of the fourth random access related information, determining transmission power of a preamble based on the preamble reception target power and a prach-ConfigurationIndex in the fourth random access related information, transmitting the preamble, receiving a RAR via a specific SearchSpace and determining a number of message 3 repetition.
Description
- This application is a continuation of U.S. application Ser. No. 18/132,431, filed on Apr. 10, 2023, which is a US Bypass Continuation Application of International Application No. PCT/KR2022/017317, filed on Nov. 7, 2022, which claims priority to and the benefit of Korean Patent Application No. 10-2021-0157917, filed on Nov. 16, 2021, the disclosure of which is incorporated herein by reference in its entirety.
- To meet the increasing demand for wireless data traffic since the commercialization of 4th generation (4G) communication systems, the 5th generation (5G) system is being developed. For the sake of high data rate, 5G system introduced millimeter wave (mmW) frequency bands (e.g. 60 GHz bands). In order to increase the propagation distance by mitigating propagation loss in the 5G communication system, various techniques are introduced such as beamforming, massive multiple-input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna. In addition, base station is divided into a central unit and plurality of distribute units for better scalability. To facilitate the introduction of various services, 5G communication system targets supporting higher data rate and smaller latency. Since high frequency band is utilized for 5G radio, uplink coverage problems can occur. To mitigate the uplink coverage problem, enhancements are required.
- Aspects of the present disclosure are to address the problems of state transition of uplink coverage problem. Accordingly, an aspect of the present disclosure is to provide a method and an apparatus for random access in repetition mode. In accordance with an aspect of the present disclosure, a method of a terminal in mobile communication system comprises receiving a
SIB 1, selecting a normal uplink or a supplementary uplink based on rsrp-ThresholdSSB-SUL, selectingmessage 3 repetition mode based on a rsrp-Threshold2 of the supplementary uplink if the supplementary uplink is selected, selecting a SSB based on a rsrp-ThresholdSSB in the fourth random access related information ifmessage 3 repetition mode is selected, selecting a preamble group based on a preamble reception target power in a first information element of the fourth random access related information and a first offset in a second information element of the fourth random access related information, determining transmission power of a preamble based on the preamble reception target power and a prach-ConfigurationIndex in the fourth random access related information, transmitting the preamble, receiving a RAR via a specific SearchSpace and determining a number ofmessage 3 repetition based on a uplink grant in the RAR and a second information in a second list. -
FIG. 1A is a diagram illustrating the architecture of an 5G system and a NG-RAN to which the disclosure may be applied; -
FIG. 1B is a diagram illustrating a wireless protocol architecture in an 5G system to which the disclosure may be applied; -
FIG. 2A is a diagram illustrating an example of a bandwidth part. -
FIG. 2B is a diagram illustrating an example of a search space and a control resource set. -
FIG. 3 is a diagram illustrating operations of a terminal and a base station according to an embodiment of the present invention. -
FIG. 4A is a flow diagram illustrating an operation of a terminal. -
FIG. 4B is a flow diagram illustrating an operation of a base station. -
FIG. 5A is a block diagram illustrating the internal structure of a UE to which the disclosure is applied. -
FIG. 5B is a block diagram illustrating the configuration of a base station according to the disclosure. - Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.
- The terms used, in the following description, for indicating access nodes, network entities, messages, interfaces between network entities, and diverse identity information is provided for convenience of explanation. Accordingly, the terms used in the following description are not limited to specific meanings but may be replaced by other terms equivalent in technical meanings.
- In the following descriptions, the terms and definitions given in the 3GPP standards are used for convenience of explanation. However, the present disclosure is not limited by use of these terms and definitions and other arbitrary terms and definitions may be employed instead.
- Table 1 lists the acronyms used throughout the present disclosure.
-
TABLE 1 Acronym Full name 5GC 5 G Core Network ACK Acknowledgement AM Acknowledged Mode AMF Access and Mobility Management Function ARQ Automatic Repeat Request AS Access Stratum ASN.1 Abstract Syntax Notation One BSR Buffer Status Report BWP Bandwidth Part CA Carrier Aggregation CAG Closed Access Group CG Cell Group C-RNTI Cell RNTI CSI Channel State Information DCI Downlink Control Information DRB (user) Data Radio Bearer DRX Discontinuous Reception HARQ Hybrid Automatic Repeat Request IE Information element LCG Logical Channel Group MAC Medium Access Control MIB Master Information Block NAS Non-Access Stratum NG-RAN NG Radio Access Network NR NR Radio Access PBR Prioritised Bit Rate PCell Primary Cell PCI Physical Cell Identifier PDCCH Physical Downlink Control Channel PDCP Packet Data Convergence Protocol PDSCH Physical Downlink Shared Channel PDU Protocol Data Unit PHR Power Headroom Report PLMN Public Land Mobile Network PRACH Physical Random Access Channel PRB Physical Resource Block PSS Primary Synchronisation Signal PUCCH Physical Uplink Control Channel PUSCH Physical Uplink Shared Channel RACH Random Access Channel RAN Radio Access Network RA-RNTI Random Access RNTI RAT Radio Access Technology RB Radio Bearer RLC Radio Link Control RNA RAN-based Notification Area RNAU RAN-based Notification Area Update RNTI Radio Network Temporary Identifier RRC Radio Resource Control RRM Radio Resource Management RSRP Reference Signal Received Power RSRQ Reference Signal Received Quality RSSI Received Signal Strength Indicator SCell Secondary Cell SCS Subcarrier Spacing SDAP Service Data Adaptation Protocol SDU Service Data Unit SFN System Frame Number S-GW Serving Gateway SI System Information SIB System Information Block SpCell Special Cell SRB Signalling Radio Bearer SRS Sounding Reference Signal SSB SS/PBCH block SSS Secondary Synchronisation Signal SUL Supplementary Uplink TM Transparent Mode UCI Uplink Control Information UE User Equipment UM Unacknowledged Mode CRP Cell Reselection Priority LPP LTE positioning protocol posSIB positioning SIB posSI positioning System Information TRP Transmission-Reception Point DL- Downlink Time Difference TDOA Of Arrival - Table 2 lists the terminologies and their definition used throughout the present disclosure.
-
TABLE 2 Terminology Definition allowed- List of configured grants for the corresponding logical channel. This CG-List restriction applies only when the UL grant is a configured grant. If present, UL MAC SDUs from this logical channel can only be mapped to the indicated configured grant configuration. If the size of the sequence is zero, then UL MAC SDUs from this logical channel cannot be mapped to any configured grant configurations. If the field is not present, UL MAC SDUs from this logical channel can be mapped to any configured grant configurations. allowed- List of allowed sub-carrier spacings for the corresponding logical channel. If SCS-List present, UL MAC SDUs from this logical channel can only be mapped to the indicated numerology. Otherwise, UL MAC SDUs from this logical channel can be mapped to any configured numerology. allowed- List of allowed serving cells for the corresponding logical channel. If ServingCells present, UL MAC SDUs from this logical channel can only be mapped to the serving cells indicated in this list. Otherwise, UL MAC SDUs from this logical channel can be mapped to any configured serving cell of this cell group. Carrier center frequency of the cell. frequency Cell combination of downlink and optionally uplink resources. The linking between the carrier frequency of the downlink resources and the carrier frequency of the uplink resources is indicated in the system information transmitted on the downlink resources. Cell in dual connectivity, a group of serving cells associated with either the Group MeNB or the SeNB. Cell A process to find a better suitable cell than the current serving cell based on reselection the system information received in the current serving cell Cell A process to find a suitable cell either blindly or based on the stored selection information Dedicated Signalling sent on DCCH logical channel between the network and a single signalling UE. discardTimer Timer to control the discard of a PDCP SDU. Starting when the SDU arrives. Upon expiry, the SDU is discarded. F The Format field in MAC subheader indicates the size of the Length field. Field The individual contents of an information element are referred to as fields. Frequency set of cells with the same carrier frequency. layer Global An identity to uniquely identify an NR cell. It is consisted of cellIdentity and cell plmn-Identity of the first PLMN-Identity in plmn-IdentityList in SIB1. identity gNB node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC. Handover procedure that changes the serving cell of a UE in RRC CONNECTED. Information A structural element containing single or multiple fields is referred as element information element. L The Length field in MAC subheader indicates the length of the corresponding MAC SDU or of the corresponding MAC CE LCID 6-bit logical channel identity in MAC subheader to denote which logical channel traffic or which MAC CE is included in the MAC subPDU MAC-I Message Authentication Code - Integrity. 16 bit or 32 bit bit string calculated by NR Integrity Algorithm based on the security key and various fresh inputs Logical a logical path between an RLC entity and a MAC entity. There are multiple channel logical channel types depending on what type of information is transferred e.g., CCCH (Common Control Channel), DCCH (Dedicate Control Channel), DTCH (Dedicate Traffic Channel), PCCH (Paging Control Channel) Logical- The IE LogicalChannelConfig is used to configure the logical channel Channel- parameters. It includes priority, prioritisedBitRate, allowedServingCells, Config allowedSCS-List, maxPUSCH-Duration, logicalChannelGroup, allowedCG- List etc logical- ID of the logical channel group, as specified in TS 38.321, which the logical Channel- channel belongs to Group MAC CE Control Element generated by a MAC entity. Multiple types of MAC CEs are defined, each of which is indicated by corresponding LCID. A MAC CE and a corresponding MAC sub-header comprises MAC subPDU Master in MR-DC, a group of serving cells associated with the Master Node, Cell comprising of the SpCell (PCell) and optionally one or more SCells. Group maxPUS Restriction on PUSCH-duration for the corresponding logical channel. If CH- present, UL MAC SDUs from this logical channel can only be transmitted Duration using uplink grants that result in a PUSCH duration shorter than or equal to the duration indicated by this field. Otherwise, UL MAC SDUs from this logical channel can be transmitted using an uplink grant resulting in any PUSCH duration. NR NR radio access PCell SpCell of a master cell group. PDCP The process triggered upon upper layer request. It includes the initialization entity of state variables, reset of header compression and manipulating of stored reestablishment PDCP SDUs and PDCP PDUs. The details can be found in 5.1.2 of 38.323 PDCP The process triggered upon upper layer request. When triggered, suspend transmitting PDCP entity set TX_NEXT to the initial value and discard all stored PDCP PDUs. The receiving entity stop and reset t-Reordering, deliver all stored PDCP SDUs to the upper layer and set RX_NEXT and RX_DELIV to the initial value PDCP- The IE PDCP-Config is used to set the configurable PDCP parameters for config signalling and data radio bearers. For a data radio bearer, discardTimer, pdcp-SN-Size, header compression parameters, t-Reordering and whether integrity protection is enabled are configured. For a signaling radio bearer, t- Reordering can be configured PLMN ID the process that checks whether a PLMN ID is the RPLMN identity or an Check EPLMN identity of the UE. Primary The MCG cell, operating on the primary frequency, in which the UE either Cell performs the initial connection establishment procedure or initiates the connection re-establishment procedure. Primary For dual connectivity operation, the SCG cell in which the UE performs SCG Cell random access when performing the Reconfiguration with Sync procedure. priority Logical channel priority, as specified in TS 38.321. an integer between 0 and 7. 0 means the highest priority and 7 means the lowest priority PUCCH SCell a Secondary Cell configured with PUCCH. Radio Logical path between a PDCP entity and upper layer (i.e., SDAP entity or Bearer RRC) RLC RLC and MAC logical channel configuration of a radio bearer in one cell bearer group. RLC The lower layer part of the radio bearer configuration comprising the RLC bearer and logical channel configurations. configuration RX_DELIV This state variable indicates the COUNT value of the first PDCP SDU not delivered to the upper layers, but still waited for. RX_NEXT This state variable indicates the COUNT value of the next PDCP SDU expected to be received. RX_REORD This state variable indicates the COUNT value following the COUNT value associated with the PDCP Data PDU which triggered t-Reordering. Serving For a UE in RRC_CONNECTED not configured with CA/DC there is only Cell one serving cell comprising of the primary cell. For a UE in RRC_CONNECTED configured with CA/DC the term ‘serving cells’ is used to denote the set of cells comprising of the Special Cell(s) and all secondary cells. SpCell primary cell of a master or secondary cell group. Special For Dual Connectivity operation the term Special Cell refers to the PCell of Cell the MCG or the PSCell of the SCG, otherwise the term Special Cell refers to the PCell. SRB Signalling Radio Bearers” (SRBs) are defined as Radio Bearers (RBs) that are used only for the transmission of RRC and NAS messages. SRB0 SRB0 is for RRC messages using the CCCH logical channel SRB1 SRB1 is for RRC messages (which may include a piggybacked NAS message) as well as for NAS messages prior to the establishment of SRB2, all using DCCH logical channel; SRB2 SRB2 is for NAS messages and for RRC messages which include logged measurement information, all using DCCH logical channel. SRB2 has a lower priority than SRB1 and may be configured by the network after AS security activation; SRB3 SRB3 is for specific RRC messages when UE is in (NG)EN-DC or NR-DC, all using DCCH logical channel SRB4 SRB4 is for RRC messages which include application layer measurement reporting information, all using DCCH logical channel. Suitable A cell on which a UE may camp. Following criteria apply cell The cell is part of either the selected PLMN or the registered PLMN or PLMN of the Equivalent PLMN list The cell is not barred The cell is part of at least one TA that is not part of the list of “Forbidden Tracking Areas for Roaming” (TS 22.011 [18]), which belongs to a PLMN that fulfils the first bullet above. The cell selection criterion S is fulfilled (i.e. RSRP and RSRQ are better than specific values t- Timer to control the reordering operation of received PDCP packets. Upon Reordering expiry, PDCP packets are processed and delivered to the upper layers. TX_NEXT This state variable indicates the COUNT value of the next PDCP SDU to be transmitted. UE UE Inactive AS Context is stored when the connection is suspended and Inactive restored when the connection is resumed. It includes information below. AS the current KgNB and KRRCint keys, the ROHC state, the stored QoS flow Context to DRB mapping rules, the C-RNTI used in the source PCell, the cellIdentity and the physical cell identity of the source PCell, the spCellConfigCommon within Reconfiguration WithSync of the NR PSCell (if configured) and all other parameters configured except for: parameters within Reconfiguration WithSync of the PCell; parameters within Reconfiguration WithSync of the NR PSCell, if configured; parameters within MobilityControlInfoSCG of the E-UTRA PSCell, if configured; servingCellConfigCommonSIB; - In the present invention, “trigger” or “triggered” and “initiate” or “initiated” may be used in the same meaning.
- In the present invention, “radio bearers allowed for the second resume procedure”, “radio bearers for which the second resume procedure is set”, and “radio bearers for which the second resume procedure is enabled” may all have the same meaning.
-
FIG. 1A is a diagram illustrating the architecture of a 5G system and a NG-RAN to which the disclosure may be applied. - 5G system consists of NG-
RAN 1 a-01 and5GC 1 a-02. An NG-RAN node is either: -
- A gNB, providing NR user plane and control plane protocol terminations towards the UE; or
- An ng-eNB, providing E-UTRA user plane and control plane protocol terminations towards the UE.
- The
gNBs 1 a-05 or 1 a-06 and ng-eNBs 1 a-03 or 1 a-04 are interconnected with each other by means of the Xn interface. The gNBs and ng-eNBs are also connected by means of the NG interfaces to the 5GC, more specifically to the AMF (Access and Mobility Management Function) and to the UPF (User Plane Function).AMF 1 a-07 andUPF 1 a-08 may be realized as a physical node or as separate physical nodes. - A
gNB 1 a-05 or 1 a-06 or an ng-eNBs 1 a-03 or 1 a-04 hosts the functions listed below. - Functions for Radio Resource Management such as Radio Bearer Control, Radio Admission Control, Connection Mobility Control, Dynamic allocation of resources to UEs in uplink, downlink and sidelink(scheduling); and
- IP and Ethernet header compression, uplink data decompression and encryption of user data stream; and
- Selection of an AMF at UE attachment when no routing to an MME can be determined from the information provided by the UE; and
- Routing of User Plane data towards UPF; and
- Scheduling and transmission of paging messages; and
- Scheduling and transmission of broadcast information (originated from the AMF or O&M); and
- Measurement and measurement reporting configuration for mobility and scheduling; and
- Session Management; and
- QoS Flow management and mapping to data radio bearers; and
- Support of UEs in RRC_INACTIVE state; and
- Radio access network sharing; and
- Tight interworking between NR and E-UTRA; and
- Support of Network Slicing.
- The
AMF 1 a-07 hosts functions such as NAS signaling, NAS signaling security, AS security control, SMF selection, Authentication, Mobility management and positioning management. - The
UPF 1 a-08 hosts functions such as packet routing and forwarding, transport level packet marking in the uplink, QoS handling and the downlink, mobility anchoring for mobility etc. -
FIG. 1B is a diagram illustrating a wireless protocol architecture in a 5G system to which the disclosure may be applied. - User plane protocol stack consists of
SDAP 1 b-01 or 1 b-02,PDCP 1 b-03 or 1 b-04,RLC 1 b-05 or 1 b-06,MAC 1 b-07 or 1 b-08 andPHY 1 b-09 or 1 b-10. Control plane protocol stack consists ofNAS 1 b-11 or 1 b-11 b-,RRC 1 b-13 or 1 b-14, PDCP, RLC, MAC and PHY. - Each protocol sublayer performs functions related to the operations listed in Table 3.
-
TABLE 3 Sublayer Functions NAS authentication, mobility management, security control etc RRC System Information, Paging, Establishment, maintenance and release of an RRC connection, Security functions, Establishment, configuration, maintenance and release of Signalling Radio Bearers (SRBs) and Data Radio Bearers (DRBs), Mobility, QoS management, Detection of and recovery from radio link failure, NAS message transfer etc. SDAP Mapping between a QoS flow and a data radio bearer, Marking Qos flow ID (QFI) in both DL and UL packets. PDCP Transfer of data, Header compression and decompression, Ciphering and deciphering, Integrity protection and integrity verification, Duplication, Reordering and in-order delivery, Out-of-order delivery etc. RLC Transfer of upper layer PDUs, Error Correction through ARQ, Segmentation and re-segmentation of RLC SDUs, Reassembly of SDU, RLC re-establishment etc. MAC Mapping between logical channels and transport channels, Multiplexing/demultiplexing of MAC SDUs belonging to one or different logical channels into/from transport blocks (TB) delivered to/from the physical layer on transport channels, Scheduling information reporting, Priority handling between UEs, Priority handling between logical channels of one UE etc. PHY Channel coding, Physical-layer hybrid-ARQ processing, Rate matching, Scrambling, Modulation, Layer mapping, Downlink Control Information, Uplink Control Information etc. - A reduced capability UE or RedCap UE has lower performance than a general UE and is used in limited scenarios such as IOT. Compared to a typical terminal having a bandwidth of 100 MHz, a transmission/reception speed of several Gbps, and four or more Rx processing units (Rx branches), RedCap terminals have a bandwidth of 20 MHz, a transmission/reception speed of several tens of Mbps, and two or less Rx processing units.
- The present invention provides a method and apparatus for a RedCap UE to access a cell supporting RedCap, receive system information, and perform necessary operations. In particular, the terminal applies search space 0 (
Search Space 0, hereinafter SS #0) and control resource set 0 (Control Resource Set 0, hereinafter CORESET #0) in the initial bandwidth part (IBWP) to obtain system information. -
FIG. 2A is a diagram illustrating an example of a bandwidth part. - With Bandwidth Adaptation (BA), the receive and transmit bandwidth of a UE need not be as large as the bandwidth of the cell and can be adjusted: the width can be ordered to change (e.g. to shrink during period of low activity to save power); the location can move in the frequency domain (e.g. to increase scheduling flexibility); and the subcarrier spacing can be ordered to change (e.g. to allow different services). A subset of the total cell bandwidth of a cell is referred to as a Bandwidth Part (BWP) and BA is achieved by configuring the UE with BWP(s) and telling the UE which of the configured BWPs is currently the active one.
-
FIG. 2A describes a scenario where 3 different BWPs are configured: -
- BWP1 with a width of 40 MHz and subcarrier spacing of 15 kHz; (2 a-11 or 2 a-19)
- BWP2 with a width of 10 MHz and subcarrier spacing of 15 kHz; (2 a-13 or 2 a-17)
- BWP3 with a width of 20 MHz and subcarrier spacing of 60 kHz. (2 a-15)
-
FIG. 2B is a diagram illustrating an example of a search space and a control resource set. - A plurality of SSs may be configured in one BWP. The UE monitors PDCCH candidates according to the SS configuration of the currently activated BWP. One SS consists of an SS identifier, a CORESET identifier indicating the associated CORESET, the period and offset of the slot to be monitored, the slot unit duration, the symbol to be monitored in the slot, the SS type, and the like. The information may be explicitly and individually configured or may be configured by a predetermined index related to predetermined values.
- One CORESET consists of a CORESET identifier, frequency domain resource information, symbol unit duration, TCI status information, and the like.
- Basically, it can be understood that CORESET provides frequency domain information to be monitored by the UE, and SS provides time domain information to be monitored by the UE.
-
CORESET # 0 andSS # 0 may be configured in the IBWP. One CORESET and a plurality of SSs may be additionally configured in the IBWP. Upon receiving the MIB (2 b-01), the UE recognizes CORESET #0 (2 b-02) and SS #0 (2 b-03) for receiving SIB1 using predetermined information included in the MIB. The UE receives SIB1 (2 b-05) through CORESET #0 (2 b-02) and SS #0 (2 b-03). In SIB1, information constituting CORESET #0 (2 b-06) and SS #0 (2 b-07) and information constituting another CORESET, for example, CORESET #n (2 b-11) and SS #m (2 b-13) may be included. - The terminal receives necessary information from the base station before the terminal enters the RRC_CONNECTED state, such as SIB2 reception, paging reception, and random access response message reception by using the CORESETs and SSs configured in SIB1. CORESET #0 (2 b-02) configured in MIB and CORESET #0 (2 b-06) configured in SIB1 may be different from each other, and the former is called a
first CORESET # 0 and the latter is called asecond CORESET # 0. SS #0 (2 b-03) configured in MIB and SS #0 (2 b-07) configured in SIB1 may be different from each other, and the former is referred to as afirst SS # 0 and the latter is referred to as asecond SS # 0.SS # 0 andCORESET # 0 configured for the RedCap terminal are referred to as athird SS # 0 and athird CORESET # 0. Thefirst SS # 0, thesecond SS # 0, and thethird SS # 0 may be the same as or different from each other. Thefirst CORESET # 0, thesecond CORESET # 0, and thethird CORESET # 0 may be the same as or different from each other.SS # 0 andCORESET # 0 are each indicated by a 4-bit index. The 4-bit index indicates a configuration predetermined in the standard specification. Except forSS # 0 andCORESET # 0, the detailed configuration of the remaining SS and CORESET is indicated by each individual information element. - When the RRC connection is established, additional BWPs may be configured for the UE.
-
FIG. 3 illustrates the operations of UE and GNB for random access procedure. - Random Access Preamble and preamble are used as same terminology.
- In 3 a-11, UE transmits to a GNB a UECapabilityInformation message. The message includes one or more frequency band specific capability information. Each band specific capability information includes a band indicator and an indicator indicating whether the UE supports
Msg 3 mode 2 or not. - In
Msg 3mode 1, UE transmitsMsg 3 without repetition. Retransmission ofMsg 3 is performed based on DCI addressed by T C-RNTI or C-RNTI. InMsg 3 mode 2, UE transmits theMsg 3 repeatedly within a bundle. The number of repetitions is indicated in the uplink grant of RAR. - After sending the message, GNB may transit UE to RRC_IDLE.
- UE performs cell selection and camps on a suitable cell.
- In 3 a-13, UE receives SIB1 in the suitable cell. GNB includes various information in the SIB1. SIB13 contains information relevant when evaluating if a UE is allowed to access a cell and defines the scheduling of other system information. It also contains radio resource configuration information that is common for all UEs. It also contains radio resource configuration information that is common for feature combinations.
- More specifically, SIB1 contains a PDCCH-ConfigCommon and one or more random-access IE groups. A random-access IE group is included per uplink per Msg3 mode. SIB1 can include a random-access IE group for
mode 1 of normal uplink, a random-access IE group for mode 2 of normal uplink, a random-access IE group formode 1 of supplementary uplink and a random-access IE group for mode 2 of supplementary uplink. Random-access IE group formode 1 of normal uplink or of supplementary uplink includes RACH-ConfigCommon and PUSCH-ConfigCommon. - Random-access IE group for mode 2 of normal uplink or of supplementary uplink includes ra-SearchSpace, RACH-ConfigCommon and PUSCH-ConfigCommon. The ra-SearchSpace can be included in RACH-ConfigCommon.
- To control the size of SIB1 in an acceptable level, Random-access IE group for mode 2 of normal uplink and Random-access IE group for mode 2 of supplementary uplink can be included in a new SIB instead of SIB1. SIB1 may include information indicating whether the new SIB is provided or not in the cell.
- RACH-ConfigCommon is used to specify the cell specific random-access parameters and includes the following IEs.
- PRACH-ConfigurationIndex: An index indicating preamble format, SFN, subframe number, starting symbol, PRACH duration for PRACH preamble. It defines the time pattern of PRACH occasions and a preamble format which can be transmitted in the PRACH occasions.
- Msg1-FDM: The number of PRACH transmission occasions FDMed in one time instance.
- Msg1-FrequencyStart: Offset of lowest PRACH transmission occasion in frequency domain with respective to
PRB 0. - PreambleReceivedTargetPower: The target power level at the network receiver side. It is used to calculate preamble transmission power.
- RA-ResponseWindow: Msg2 (RAR) window length in number of slots.
- MessagePowerOffsetGroupB: Threshold for preamble selection.
- NumberOfRA-PreamblesGroupA: The number of CB preambles per SSB in group A.
- RA-ContentionResolutionTimer: The initial value for the contention resolution timer.
- RA-Msg3SizeGroupA: Transport Blocks size threshold in bits below which the UE shall use a contention-based RA preamble of group A.
- RSRP-ThresholdSSB: UE may select the SS block and corresponding PRACH resource for path-loss estimation and (re)transmission based on SS blocks that satisfy the threshold.
- RSRP-ThresholdSSB-SUL: The UE selects SUL carrier to perform random access based on this threshold.
- RSRP-ThresholdMode: The UE selects
Msg 3 repetition mode based on this threshold. It can be present in a RACH-ConfigCommon formode 1 in NUL and a RACH-ConfigCommon formode 1 in SUL. It is absent in a RACH-ConfigCommon for mode 2 in NUL and a RACH-ConfigCommon for mode 2 in SUL. - TotalNumberOfRA-Preambles: Total number of preambles used for contention based and contention free 4-step or 2-step random access in the RACH resources defined in RACH-ConfigCommon, excluding preambles used for other purposes (e.g., for SI request).
- PUSCH-ConfigCommon is used to configure the cell specific PUSCH parameters and includes the following IEs.
- Msg3-DeltaPreamble: Power offset between msg3 and RACH preamble transmission.
- PUSCH-TimeDomainAllocationList: List of time domain allocations for timing of UL assignment to UL data. This list is used for
Mode 1. - PUSCH-TimeDomainAllocationList2: List of time domain allocations for timing of UL assignment to UL data. This list is used for Mode 2.
- PUSCH-TimeDomainResourceAllocation is used to configure a time domain relation between PDCCH and PUSCH. PUSCH-TimeDomainResourceAllocationList contains one or more of such PUSCH-TimeDomainResourceAllocations. The network indicates in the UL grant which of the configured time domain allocations the UE shall apply for that UL grant. A PUSCH-TimeDomainResourceAllocation is associated with a k2 and startSymbolAndLength. k2 is the distance between PDCCH and PUSCH. startSymbolAndLength is an index giving valid combinations of start symbol and length.
- The IE PUSCH-TimeDomainResourceAllocation2 is used to configure a time domain relation between PDCCH and PUSCH. PUSCH-TimeDomainResourceAllocationList2 contains one or more of such PUSCH-TimeDomainResourceAllocation2s. The network indicates in the UL grant which of the configured time domain allocations the UE shall apply for that UL grant. A PUSCH-TimeDomainResourceAllocation2 is associated with a k2, startSymbol, length and numberOfRepetitions. startSymbol indicates the index of start symbol for PUSCH. length indicates the length allocated for PUSCH. numberOfRepetitions is number of repetitions.
- PDCCH-ConfigCommon is used to configure cell specific PDCCH parameters includes following IEs.
- CommonControlResourceSet: An additional common control resource set which may be configured and used for any common or UE-specific search space.
- CommonSearchSpaceList: A list of additional common search spaces. If the network configures this field, it uses SearchSpaceIds other than 0.
- ControlResourceSetZero: Parameters of the
common CORESET # 0 which can be used in any common or UE-specific search spaces. - PagingSearchSpace: ID of the Search space for paging.
- RA-SearchSpace: ID of the Search space for random access procedure.
- SearchSpaceOtherSystemInformation: ID of the Search space for other system information, i.e., SIB2 and beyond.
- SearchSpaceZero: Parameters of the
common SearchSpace # 0. - After receiving the information, UE initiates random access procedure. Random access procedure can be initiated to establish RRC connection.
- In 3 a-15, UE selects, based on rsrp-ThresholdSSB-SUL indicated in the RACH-ConfigCommon for
mode 1 of NUL, an uplink where random access procedure is to be performed. - If the RSRP of the downlink pathloss reference is less than rsrp-ThresholdSSB-SUL, UE selects the NUL carrier for performing random access procedure.
- If the RSRP of the downlink pathloss reference is greater than or equal to rsrp-ThresholdSSB-SUL, UE selects the SUL carrier for performing random access procedure.
- The downlink pathloss reference could be a SSB with the best RSRP among the SSBs of the cell. It could be any SSB of the cell.
- UE could use, in selecting UL carrier, the rsrp-ThresholdSSB-SUL included in the first RACH-ConfigCommon of NUL. GNB may set the same values for the rsrp-ThresholdSSB-SULs included in RACH-ConfigCommon for
mode 1 of SUL and the rsrp-ThresholdSSB-SUL included in RACH-ConfigCommon formode 1 of NUL. GNB does not include rsrp-ThresholdSSB-SUL in RACH-ConfigCommon for mode 2 of NUL and in RACH-ConfigCommon for mode 2 of SUL. - In 3 a-17, UE selects the mode based on the rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL or based on the rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of SUL.
- If NUL is selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects the
mode 1. Alternatively, if NUL is selected and the average over SS-RSRPs of SSBs is higher than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL, UE selectsmode 1. - If NUL is selected and if no SSB with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects the mode 2. Alternatively, if NUL is selected and the average over SS-RSRPs of SSBs is lower than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of NUL, UE selects mode 2.
- If SUL is selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of SUL, is available, UE selects the
mode 1. Alternatively, if SUL is selected and the average over SS-RSRPs of SSBs is higher than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of SUL, UE selectsmode 1. - If SUL is selected and if no SSB with SS-RSRP above rsrp-ThresholdMod, indicated in RACH-ConfigCommon for mode1 of SUL, is available, UE selects the mode 2. Alternatively, if SUL is selected and the average over SS-RSRPs of SSBs is lower than rsrp-ThresholdMod indicated in RACH-ConfigCommon for mode1 of SUL, UE selects mode 2.
- SS-RSRP (Synchronization Signal-reference signal received power) is defined as the linear average over the power contributions (in Watt) of the resource elements that carry SSS.
- In 3 a-19, UE selects an SSB based on a rsrp-ThresholdSSB.
- If NUL and
mode 1 are selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdSSB, indicated in RACH-ConfigCommon for mode1 of NUL, is available, UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon formode 1 of NUL. - If NUL and mode 2 are selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdSSB, indicated in RACH-ConfigCommon for mode2 of NUL, is available, UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 2 of NUL.
- If SUL and
mode 1 are selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdSSB, indicated in RACH-ConfigCommon formode 1 of SUL, is available, UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon formode 1 of SUL. - If SUL and mode 2 are selected and if at least one of the SSBs with SS-RSRP above rsrp-ThresholdSSB, indicated in RACH-ConfigCommon for mode2 of SUL, is available, UE selects a SSB with SS-RSRP above rsrp-ThresholdSSB indicated in RACH-ConfigCommon for mode 2 of SUL.
- In 3 a-21, UE selects preamble group based on the random-access IE groups received via SIB1.
- 64 preambles are defined in total. They can be divided into two groups. UE having large data and being in a good channel condition can select Preamble Group B so that GNB can allocate bigger UL grant. UE having smaller data or being in a bad channel condition can select Preamble Group A so that GNB can allocate normal UL grant.
- If the potential Msg3 size (UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs) is greater than ra-Msg3SizeGroupA and the pathloss is less than PCMAX (of the Serving Cell performing the Random Access Procedure)-preambleReceivedTargetPower-msg3-DeltaPreamble-messagePowerOffsetGroupB, UE select the Random Access Preamble group B.
- If the Random Access procedure was initiated for the CCCH logical channel and the CCCH SDU size plus MAC subheader is greater than ra-Msg3SizeGroupA, UE selects the Random Access Preamble group B.
- If the Random Access procedure was not initiated for the CCCH logical channel, and if the potential Msg3 size (UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs) is not greater than ra-Msg3SizeGroupA, UE selects the Random Access Preamble group A.
- If the Random Access procedure was initiated for the CCCH logical channel, and if the potential Msg3 size (UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs) is not greater than ra-Msg3SizeGroupA, UE selects the Random Access Preamble group A.
- If the Random Access procedure was not initiated for the CCCH logical channel, and If the potential Msg3 size (UL data available for transmission plus MAC subheader(s) and, where required, MAC CEs) is greater than ra-Msg3SizeGroupA, and the pathloss is not less than PCMAX (of the Serving Cell performing the Random Access Procedure)-preambleReceivedTargetPower-msg3-DeltaPreamble-messagePowerOffsetGroupB, UE select the Random Access Preamble group A.
- If
mode 1 in NUL is selected, UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon formode 1 of NUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon formode 1 of NUL. - If msg3-DeltaPreamble is not provided in PUSCH-ConfigCommon for
mode 1 of NUL, UE uses zero. - If mode 2 in NUL is selected, UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon for mode 2 of NUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon for mode 2 of NUL.
- If msg3-DeltaPreamble is not provided in PUSCH-ConfigCommon for mode 2 of NUL, UE uses msg3-DeltaPreamble provided in PUSCH-ConfigCommon for
mode 1 or NUL. - If
mode 1 in SUL is selected, UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon formode 1 of SUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon formode 1 of SUL. - If msg3-DeltaPreamble is not provided in PUSCH-ConfigCommon for
mode 1 of SUL, UE uses zero. - If mode 2 in SUL is selected, UE uses msg3-DeltaPreamble included in PUSCH-ConfigCommon for mode 2 of SUL and uses Msg3SizeGroupA, preambleReceivedTargetPower and messagePowerOffsetGroupB included in RACH-ConfigCommon for mode 2 of SUL.
- If msg3-DeltaPreamble is not provided in PUSCH-ConfigCommon for mode 2 of SUL, UE uses msg3-DeltaPreamble provided in PUSCH-ConfigCommon for
mode 1 or SUL. - UE select a preamble randomly with equal probability from the preambles associated with the selected SSB and the selected preamble group. UE sets the PREAMBLE_INDEX to a ra-PreambleIndex corresponding to the selected preamble.
- UE determines the next available PRACH occasion from the PRACH occasions corresponding to the selected SSB. UE shall select a PRACH occasion randomly with equal probability amongst the consecutive PRACH occasions indicated by PRACH configuration index of RACH-ConfigCommon of the selected mode and the selected uplink.
- In 3 a-23, UE transmits the selected preamble in the selected PRACH occasion in the selected uplink.
- UE sets PREAMBLE_RECEIVED_TARGET_POWER to preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×powerRampingStep+POWER_OFFSET_2STEP_RA.
- UE sets the transmission power of the preamble to the sum of PREAMBLE_RECEIVED_TARGET_POWER and the pathloss.
- If
mode 1 in NUL is selected (or if mode 2 is not selected and NUL is selected), UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon formode 1 of NUL. UE sets POWER_OFFSET_2STEP_RA to zero. UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon formode 1 of NUL. DELTA_PREAMBLE is predefined for each preamble format. PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission. - If mode 2 in NUL is selected, UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 2 of NUL. UE sets POWER_OFFSET_2STEP_RA to zero. UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 2 of NUL. DELTA_PREAMBLE is predefined for each preamble format. PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- If
mode 1 in SUL is selected, UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon formode 1 of SUL. UE sets POWER_OFFSET_2STEP_RA to zero. UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon formode 1 of SUL. DELTA_PREAMBLE is predefined for each preamble format. PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission. - If mode 2 in SUL is selected, UE uses preambleReceivedTargetPower and powerRampingStep in RACH-ConfigCommon for mode 2 of SUL. UE sets POWER_OFFSET_2STEP_RA to zero. UE sets DELTA_PREAMBLE according to the preamble format determined from prach-ConfigurationIndex indicated in RACH-ConfigCommon for mode 2 of SUL. DELTA_PREAMBLE is predefined for each preamble format. PREAMBLE_POWER_RAMPING_COUNTER is initialized to 1 and incremented by 1 for each preamble transmission.
- In 3 a-25, UE receives RAR including an uplink grant.
- To receive RAR, UE starts the ra-ResponseWindow configured by RACH-ConfigCommon at the first PDCCH occasion from the end of the Random Access Preamble transmission. UE monitors the PDCCH of the SpCell for Random Access Response(s) identified by the RA-RNTI while the ra-ResponseWindow is running.
- In monitoring PDCCH, UE applies searchSpace indicated by ra-SearchSpace.
- If
mode 1 in NUL ormode 1 in SUL is selected, ra-SearchSpace in PDCCH-ConfigCommon indicates the searchSpace UE should monitor for RAR reception. - If mode 2 in NUL is selected, ra-SearchSpace in RACH-ConfigCommon for mode 2 of NUL indicates the searchSpace UE should monitor for RAR reception.
- If mode 2 in SUL is selected, ra-SearchSpace in RACH-ConfigCommon for mode 2 of SUL indicates the searchSpace UE should monitor for RAR reception. If ra-SearchSpace is not present in RACH-ConfigCommon for mode 2 of SUL, ra-SearchSpace in RACH-ConfigCommon for mode 2 of NUL is applied for RAR reception for mode 2 in SUL.
- By configuring different ra-SearchSpaces for
mode 1 and mode 2, GNB can ensure RAR for a mode is not received by UE operating in the other mode. - UE considers Random Access Response reception is successful if the Random Access Response contains a MAC subPDU with Random Access Preamble identifier corresponding to the transmitted PREAMBLE_INDEX.
- The MAC subPDU contains a MAC RAR. The MAC RAR includes fields like Timing Advance Command, Uplink Grant and Temporary C-RNTI. The Timing Advance Command field indicates the index value used to control the amount of timing adjustment that the UE has to apply. The size of the Timing Advance Command field is 12 bits. The Uplink Grant field indicates the resources to be used on the uplink. The size of the UL Grant field is 27 bits. The Temporary C-RNTI field indicates the temporary identity that is used by the UE during Random Access. The size of the Temporary C-RNTI field is 16 bits.
- Uplink Grant field further includes PUSCH time resource allocation field. PUSCH time resource allocation field is 4 bit.
- This field indicates a TimeDomainAllocation of a TimeDomainAllocationList in PUSCH-ConfigCommon if
mode 1 is selected (or UE transmitted preambles associated with mode 1) or a TimeDomainAllocation2 of a TimeDomainAllocationList2 in PUSCH-ConfigCommon if mode 2 is selected (or UE transmitted preambles associated with mode 2). - If
mode 1 in NUL is selected and transmitted preamble is associated withmode 1 in NUL, TimeDomainAllocationList in PUSCH-ConfigCommon formode 1 of NUL is used to determine time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation indicated by PUSCH time resource allocation field of Uplink Grant. - If
mode 1 in SUL is selected and transmitted preamble is associated withmode 1 in SUL, TimeDomainAllocationList in PUSCH-ConfigCommon formode 1 of SUL is used to determine time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation indicated by PUSCH time resource allocation field of Uplink Grant. - If mode 2 in NUL is selected and transmitted preamble is associated with mode 2 in NUL, TimeDomainAllocationList2 in PUSCH-ConfigCommon for mode 2 of NUL is used to determine number of repetition and time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation2 indicated by PUSCH time resource allocation field of Uplink Grant.
- If mode 2 in SUL is selected and transmitted preamble is associated with mode 2 in SUL, TimeDomainAllocationList2 in PUSCH-ConfigCommon for mode 2 of SUL is used to determine number of repetition and time domain relation between PDCCH and PUSCH. In doing so, UE applies the TimeDomainAllocation2 indicated by PUSCH time resource allocation field of Uplink Grant.
- In 3 a-27, UE performs
Msg 3 transmission according to UL grant in the received RAR. UE generates a MAC PDU and triggers a new transmission. If mode 2 is applied and TimeDomainAllocationList2 is used, at most REPETITION_NUMBER−1 HARQ retransmission follows within a bundle after the first transmission in the bundle. - REPETITION_NUMBER is set to the number of repetitions associated with TimeDomainAllocation2 indicated by the uplink grant. Bundling operation relies on the HARQ entity for invoking the same HARQ process for each transmission that is part of the same bundle.
- UE determines the PUSCH transmission power by summing offset 1, offset 2, pathloss and other parameters related with number of PRBs and power control commands.
- Offset 1 is sum of preambleReceivedTargetPower and msg3-DeltaPreamble.
- Offset2 is msg3-Alpha. Two instances of msg3-Alpha can be provided: one for NUL and the other for SUL.
- If
mode 1 in NUL is selected, preambleReceivedTargetPower included in PRACH-ConfigCommon ofmode 1 in NUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon ofmode 1 in NUL and msg3-Alpha for NUL are used. If msg3-Alpha for NUL is not provided, offset2 is 1. - If
mode 1 in SUL is selected, preambleReceivedTargetPower included in PRACH-ConfigCommon ofmode 1 in SUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon ofmode 1 in SUL and msg3-Alpha for SUL are used. If msg3-Alpha for SUL is not provided, offset2 is 1. - If mode 2 in NUL is selected, preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 2 in NUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 2 in NUL and msg3-Alpha for NUL are used. If msg3-Alpha for NUL is not provided, offset2 is 1.
- If mode 2 in SUL is selected, preambleReceivedTargetPower included in PRACH-ConfigCommon of mode 2 in SUL and msg3-DeltaPreamble included in PUSCH-ConfigCommon of mode 2 in SUL and msg3-Alpha for SUL are used. If msg3-Alpha for SUL is not provided, offset2 is 1.
- GNB receives the
Msg 3 and process RRC message included inMsg 3. If RRC message requesting connection setup, GNB performs call admission control and act upon the result. -
FIG. 4A illustrates the operation of the terminal. - In step 4 a-11, the terminal receives first RACH configuration, first PUSCH configuration, second RACH configuration, second PUSCH configuration, third RACH configuration, third PUSCH configuration, fourth RACH configuration, and fourth PUSCH configuration from the base station.
- In step 4 a-13, the terminal selects an uplink on which to perform a random access procedure based on the first rsrp threshold.
- In step 4 a-15, if normal uplink is selected, the UE selects
message 3 repetition mode based on the second rsrp threshold of the first RACH configuration. If the supplementary uplink is selected, the UE selects themessage 3 repetition mode based on the second rsrp threshold of the second RACH configuration. - In step 4 a-17, the terminal selects an SSB based on the third rsrp threshold.
- In step 4 a-19, the UE randomly selects one preamble among preambles associated with the selected SSB with equal probability.
- In step 4 a-21, the terminal transmits the selected preamble on the selected uplink carrier.
- In step 4 a-23, the terminal receives a random access response message including a preamble identifier related to the preamble transmission.
- In step 4 a-25, the UE determines the PUSCH transmission power.
- In step 4 a-27, the terminal transmits
message 3 based on the time resource allocation field of the uplink grant included in the random access response message. - If the normal uplink is selected and the
message 3 repetition mode is not selected, the UE determine the PUSCH transmission power using the preamble reception target power of the first RACH configuration, themessage 3 delta preamble of the first PUSCH configuration, and themessage 3 alpha for the normal uplink. - If the normal uplink is selected and the
message 3 repetition mode is selected, the UE determine the PUSCH transmission power using the preamble reception target power of the second RACH configuration, themessage 3 delta preamble of the second PUSCH configuration, and themessage 3 alpha for the normal uplink. - If the supplementary uplink is selected and the
message 3 repetition mode is not selected, the UE determine the PUSCH transmission power using the preamble reception target power of the third RACH configuration, themessage 3 delta preamble of the third PUSCH configuration, and themessage 3 alpha for the supplementary uplink. - If the supplementary uplink is selected and the
message 3 repetition mode is selected, the UE determine the PUSCH transmission power using the preamble reception target power of the fourth RACH configuration, themessage 3 delta preamble of the fourth PUSCH configuration, and themessage 3 alpha for the supplementary uplink. - The first RACH configuration, the first PUSCH configuration, the second RACH configuration, and the second PUSCH configuration are included in the first SIB. The third RACH configuration, third PUSCH configuration, fourth RACH configuration, and fourth PUSCH configuration are included in the second SIB.
- The first SIB includes information indicating whether a second SIB is provided.
- The uplink carrier is selected based on the first rsrp threshold included in the first RACH configuration.
-
FIG. 4B illustrates the operation of a base station. - In
step 4 b-11, the base station transmits first RACH configuration, first PUSCH configuration, second RACH configuration, second PUSCH configuration, third RACH configuration, third PUSCH configuration, fourth RACH configuration, and fourth PUSCH configuration. - In
step 4 b-13, the base station receives a preamble. - In
step 4 b-15, the base station determines a mode related to the preamble and determines an uplink transmission resource according to the determined mode. - In
step 4 b-17, the base station transmits a random access response message including the uplink transmission resource. - For the terminal selecting the normal uplink and not selecting the
message 3 repetition mode, the base station sets these parameters so that the transmit power is determined based on the preamble reception target power of the first RACH configuration, theMessage 3 delta preamble of the first PUSCH configuration, and theMessage 3 Alpha for normal UL. - For the terminal selecting the normal uplink and selecting the
message 3 repetition mode, the base station sets these parameters so that the transmit power is determined based on the preamble reception target power of the second RACH configuration, theMessage 3 delta preamble of the second PUSCH configuration, and theMessage 3 Alpha for normal UL. - For the terminal selecting the supplementary uplink and not selecting the
message 3 repetition mode, the base station sets these parameters so that the transmit power is determined based on the preamble reception target power of the third RACH configuration, theMessage 3 delta preamble of the third PUSCH configuration, and theMessage 3 Alpha for supplementary UL. - For the terminal selecting the supplementary uplink and selecting the
message 3 repetition mode, the base station sets these parameters so that the transmit power is determined based on the preamble reception target power of the fourth RACH configuration, theMessage 3 delta preamble of the fourth PUSCH configuration, and theMessage 3 Alpha for supplementary UL. - The base station includes the first RACH configuration, the first PUSCH configuration, the second RACH configuration, and the second PUSCH configuration in the first SIB. The base station includes the third RACH configuration, the third PUSCH configuration, the fourth RACH configuration, and the fourth PUSCH configuration are included in the second SIB.
- The base station includes information indicating whether a second SIB is provided in the first SIB.
-
FIG. 5A is a block diagram illustrating the internal structure of a UE to which the disclosure is applied. - Referring to the diagram, the UE includes a controller 5 a-01, a storage unit 5 a-02, a transceiver 5 a-03, a main processor 5 a-04 and I/O unit 5 a-05.
- The controller 5 a-01 controls the overall operations of the UE in terms of mobile communication. For example, the controller 5 a-01 o receives/transmits signals through the transceiver 5 a-03. In addition, the controller 5 a-01 records and reads data in the storage unit 5 a-02. To this end, the controller 5 a-01 includes at least one processor. For example, the controller 5 a-01 may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls the upper layer, such as an application program. The controller controls the storage unit and transceiver such that UE operations illustrated in
FIG. 2A andFIG. 2B andFIG. 3 are performed. - The storage unit 5 a-02 stores data for operation of the UE, such as a basic program, an application program, and configuration information. The storage unit 5 a-02 provides stored data at a request of the controller 5 a-01.
- The transceiver 5 a-03 consists of an RF processor, a baseband processor and a plurality of antennas. The RF processor performs functions for transmitting/receiving signals through a wireless channel, such as signal band conversion, amplification, and the like. Specifically, the RF processor up-converts a baseband signal provided from the baseband processor into an RF band signal, transmits the same through an antenna, and down-converts an RF band signal received through the antenna into a baseband signal. The RF processor may include a transmission filter, a reception filter, an amplifier, a mi10r, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), and the like. The RF processor may perform MIMO and may receive multiple layers when performing the MIMO operation. The baseband processor performs a function of conversion between a baseband signal and a bit string according to the physical layer specification of the system. For example, during data transmission, the baseband processor encodes and modulates a transmission bit string, thereby generating complex symbols. In addition, during data reception, the baseband processor demodulates and decodes a baseband signal provided from the RF processor, thereby restoring a reception bit string.
- The main processor 5 a-04 controls the overall operations other than mobile operation. The main processor 5 a-04 process user input received from I/O unit 5 a-05, stores data in the storage unit 5 a-02, controls the controller 5 a-01 for required mobile communication operations and forward user data to I/O unit (905).
- I/O unit 5 a-05 consists of equipment for inputting user data and for outputting user data such as a microphone and a screen. I/O unit 5 a-05 performs inputting and outputting user data based on the main processor's instruction.
-
FIG. 5B is a block diagram illustrating the configuration of a base station according to the disclosure. - As illustrated in the diagram, the base station includes a
controller 5 b-01, astorage unit 5 b-02, atransceiver 5 b-03 and abackhaul interface unit 5 b-04. - The
controller 5 b-01 controls the overall operations of the main base station. For example, thecontroller 5 b-01 receives/transmits signals through thetransceiver 5 b-03, or through thebackhaul interface unit 5 b-04. In addition, thecontroller 5 b-01 records and reads data in thestorage unit 5 b-02. To this end, thecontroller 5 b-01 may include at least one processor. The controller controls transceiver, storage unit and backhaul interface such that base station operation illustrated inFIG. 2A andFIG. 2B are performed. - The
storage unit 5 b-02 stores data for operation of the main base station, such as a basic program, an application program, and configuration information. Particularly, thestorage unit 5 b-02 may store information regarding a bearer allocated to an accessed UE, a measurement result reported from the accessed UE, and the like. In addition, thestorage unit 5 b-02 may store information serving as a criterion to deter mine whether to provide the UE with multi-connection or to discontinue the same. In addition, thestorage unit 5 b-02 provides stored data at a request of thecontroller 5 b-01. - The
transceiver 5 b-03 consists of an RF processor, a baseband processor and a plurality of antennas. The RF processor performs functions for transmitting/receiving signals through a wireless channel, such as signal band conversion, amplification, and the like. Specifically, the RF processor up-converts a baseband signal provided from the baseband processor into an RF band signal, transmits the same through an antenna, and down-converts an RF band signal received through the antenna into a baseband signal. The RF processor may include a transmission filter, a reception filter, an amplifier, a mi10r, an oscillator, a DAC, an ADC, and the like. The RF processor may perform a down link MIMO operation by transmitting at least one layer. The baseband processor performs a function of conversion between a baseband signal and a bit string according to the physical layer specification of the first radio access technology. For example, during data transmission, the baseband processor encodes and modulates a transmission bit string, thereby generating complex symbols. In addition, during data reception, the baseband processor demodulates and decodes a baseband signal provided from the RF processor, thereby restoring a reception bit string. - The
backhaul interface unit 5 b-04 provides an interface for communicating with other nodes inside the network. Thebackhaul interface unit 5 b-04 converts a bit string transmitted from the base station to another node, for example, another base station or a core network, into a physical signal, and converts a physical signal received from the other node into a bit string.
Claims (20)
1. A method performed by a wireless device, the method comprising:
receiving system information of a cell, wherein the system information comprises a plurality of configuration parameters associated with random access, and wherein the plurality of configuration parameters associated with random access comprises:
a first configuration parameter of uplink;
a second configuration parameter of the uplink;
a first configuration parameter of supplementary uplink, wherein the first configuration parameter of the supplementary uplink comprises a first power offset; and
a second configuration parameter of the supplementary uplink, wherein the second configuration parameter of the supplementary uplink comprises a second power offset;
selecting, based on a first reference signal received power (RSRP) threshold, a supplemental uplink (SUL) carrier for performing random access;
determining, based on a second RSRP threshold, an uplink transmission repetition for the random access;
selecting, based on an RSRP threshold of the second configuration parameter of the supplementary uplink, a synchronization signal block (SSB);
selecting, based on a preamble power parameter of the second configuration parameter of the supplementary uplink and based on the second power offset of the second configuration parameter of the supplementary uplink, a preamble group;
transmitting, based on the preamble power parameter of the second configuration parameter of the supplementary uplink, a random access preamble;
receiving, based on a search space, a random access response (RAR); and
determining, based on an uplink grant of the RAR, a number of repetitions for an uplink transmission scheduled by the uplink grant of the RAR.
2. The method of claim 1 , wherein:
the first power offset is a first delta preamble parameter of the first configuration parameter of the supplementary uplink; and
the second power offset is a second delta preamble parameter of the second configuration parameter of the supplementary uplink.
3. The method of claim 4 , wherein the preamble power parameter of the second configuration parameter of the supplementary uplink is a preamble received target power parameter of the second configuration parameter of the supplementary uplink.
4. The method of claim 2 , further comprising:
selecting, based on the second delta preamble parameter being configured in the second configuration parameter of the supplementary uplink, the second delta preamble parameter between the first delta preamble parameter and the second delta preamble parameter.
5. The method of claim 2 , wherein the first delta preamble parameter is a msg3-DeltaPreamble configured in a PUSCH-ConfigCommon for the supplementary uplink.
6. The method of claim 2 , wherein the first RSRP threshold is present in the first configuration parameter of the uplink, and wherein the first RSRP threshold is absent in the second configuration parameter of the uplink.
7. The method of claim 6 , wherein the first RSRP threshold is present in the first configuration parameter of the supplementary uplink, and wherein the first RSRP threshold is absent in the second configuration parameter of the supplementary uplink.
8. The method of claim 1 , wherein:
the second configuration parameter of the uplink comprises a random access configuration for message 3 (Msg3) repetition on the uplink;
the second configuration parameter of the supplementary uplink comprises a random access configuration for Msg3 repetition on the supplementary uplink; and
the determined uplink transmission repetition for the random access comprises Msg3 repetition for the random access.
9. The method of claim 1 , wherein:
the first configuration parameter of the uplink comprises a first RSRP threshold for SSB selection;
the second configuration parameter of the uplink comprises a second RSRP threshold for SSB selection;
the first configuration parameter of the supplementary uplink comprises a third RSRP threshold for SSB selection;
the second configuration parameter of the supplementary uplink comprises a fourth RSRP threshold for SSB selection; and
the selecting, based on the RSRP threshold of the second configuration parameter of the supplementary uplink, the SSB comprises:
selecting, based on the fourth RSRP threshold for SSB selection, the SSB.
10. The method of claim 1 , wherein the first configuration parameter of the supplementary uplink comprises at least one parameter of a first RACH-ConfigCommon for the supplementary uplink, and
wherein the second configuration parameter of the supplementary uplink comprises at least one parameter of a second RACH-ConfigCommon for the supplementary uplink.
11. The method of claim 1 , wherein the first configuration parameter of the uplink comprises at least one parameter of a RACH-ConfigCommon for the uplink and at least one parameter of a PUSCH-ConfigCommon for the uplink, and
wherein the first configuration parameter of the supplementary uplink comprises at least one parameter of a RACH-ConfigCommon for the supplementary uplink and at least one parameter of a PUSCH-ConfigCommon for the supplementary uplink.
12. The method of claim 1 , further comprising:
repeatedly performing, based on the number of repetitions for the uplink transmission scheduled by the uplink grant of the RAR, the uplink transmission.
13. The method of claim 1 , wherein the random access corresponds to a four-step random access procedure configured for the SUL carrier, and
wherein the system information is system information block 1 (SIB1).
14. The method of claim 1 , wherein the second configuration parameter of the supplementary uplink further comprises a prach-ConfigurationIndex, and
wherein the transmitting the random access preamble is further based on a power offset value associated with the prach-ConfigurationIndex of the second configuration parameter of the supplementary uplink.
15. The method of claim 14 , wherein the power offset value is a DELTA_PREAMBLE value corresponding to a preamble format of the prach-ConfigurationIndex of the second configuration parameter of the supplementary uplink.
16. The method of claim 15 , wherein the transmitting the random access preamble comprises:
determining, based on the preamble power parameter of the second configuration parameter of the supplementary uplink and based on the DELTA_PREAMBLE value, a transmission power of the random access preamble.
17. The method of claim 1 , wherein the preamble power parameter of the second configuration parameter of the supplementary uplink comprises:
a preambleReceivedTargetPower of the second configuration parameter of the supplementary uplink.
18. The method of claim 17 , further comprising:
performing, based on the preambleReceivedTargetPower of the second configuration parameter of the supplementary uplink and based on the second power offset of the second configuration parameter of the supplementary uplink, the uplink transmission.
19. The method of claim 18 , wherein the performing the uplink transmission comprises:
determining, based on the preambleReceivedTargetPower of the second configuration parameter of the supplementary uplink and based on the second power offset of the second configuration parameter of the supplementary uplink, a physical uplink shared channel (PUSCH) transmission power of the uplink transmission.
20. The method of claim 18 , wherein the performing the uplink transmission is further based on a msg3-Alpha for the supplementary uplink.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/241,993 US20230422311A1 (en) | 2021-11-16 | 2023-09-04 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210157917A KR102481321B1 (en) | 2021-11-16 | 2021-11-16 | Method and Apparatus for terminal to perform shared channel transmission during random access procedure in mobile wireless communication system |
KR10-2021-0157917 | 2021-11-16 | ||
PCT/KR2022/017317 WO2023090733A1 (en) | 2021-11-16 | 2022-11-07 | Method and device for performing uplink shared channel transmission in random access process by ue in wireless mobile communication system |
US18/132,431 US11800568B2 (en) | 2021-11-16 | 2023-04-10 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
US18/241,993 US20230422311A1 (en) | 2021-11-16 | 2023-09-04 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/132,431 Continuation US11800568B2 (en) | 2021-11-16 | 2023-04-10 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230422311A1 true US20230422311A1 (en) | 2023-12-28 |
Family
ID=84547616
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/132,431 Active US11800568B2 (en) | 2021-11-16 | 2023-04-10 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
US18/241,993 Pending US20230422311A1 (en) | 2021-11-16 | 2023-09-04 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/132,431 Active US11800568B2 (en) | 2021-11-16 | 2023-04-10 | Method and apparatus for random access in repetition mode in wireless mobile communication system |
Country Status (3)
Country | Link |
---|---|
US (2) | US11800568B2 (en) |
KR (2) | KR102481321B1 (en) |
WO (1) | WO2023090733A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102324958B1 (en) * | 2016-09-29 | 2021-11-12 | 삼성전자 주식회사 | Methods and apparatus for supporting multiple services in a wireless communication system |
US11219062B2 (en) * | 2018-08-09 | 2022-01-04 | Comcast Cable Communications, Llc | Channel selection using a listen before talk procedure |
KR20200131089A (en) * | 2019-05-13 | 2020-11-23 | 삼성전자주식회사 | Method and apparatus for transmitting and receiving a system information block in wireless communication system |
KR20210006145A (en) * | 2019-07-08 | 2021-01-18 | 삼성전자주식회사 | Method and apparatus for transmitting and receiving data channel in wireless communication system |
KR20210011282A (en) * | 2019-07-22 | 2021-02-01 | 삼성전자주식회사 | Method and apparatus for transmission of uplink control information in wireless communication system |
US11310836B2 (en) * | 2019-08-19 | 2022-04-19 | Samsung Electronics Co., Ltd. | Repetition of PRACH preamble transmission for UEs |
US11659600B2 (en) * | 2020-02-28 | 2023-05-23 | Samsung Electronics Co., Ltd. | Method and apparatus for random access procedure |
-
2021
- 2021-11-16 KR KR1020210157917A patent/KR102481321B1/en active IP Right Grant
-
2022
- 2022-11-07 WO PCT/KR2022/017317 patent/WO2023090733A1/en unknown
- 2022-12-16 KR KR1020220176732A patent/KR102517305B1/en active IP Right Grant
-
2023
- 2023-04-10 US US18/132,431 patent/US11800568B2/en active Active
- 2023-09-04 US US18/241,993 patent/US20230422311A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2023090733A1 (en) | 2023-05-25 |
KR102481321B1 (en) | 2022-12-26 |
US11800568B2 (en) | 2023-10-24 |
US20230247677A1 (en) | 2023-08-03 |
KR102517305B1 (en) | 2023-04-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20230074410A1 (en) | Method and apparatus for reduced capability terminal to access a cell in mobile wireless communication system | |
US11943672B2 (en) | Method and apparatus for reduced capability terminal to determine intra-frequency cell reselection parameter in mobile wireless communication system | |
US11943671B2 (en) | Method and apparatus for reduced capability terminal to determine intra-frequency cell reselection parameter via system information block 1 in mobile wireless communication system | |
US11553535B1 (en) | Method and apparatus for base station to perform random access procedure with reduced capability terminal using a plurality of common configurations and a single time alignment timer in mobile wireless communication system | |
US20240080934A1 (en) | Method and apparatus for application layer measurement reporting by segmentation in wireless mobile communication system | |
US20230133352A1 (en) | Method and apparatus for reduced capability terminal to perform random access using a plurality of search spaces and a plurality of control resource sets in mobile wireless communication system | |
US20230072886A1 (en) | Method and apparatus for reduced capability terminal to determine intra-frequency cell reselection parameter for cell reselection in mobile wireless communication system | |
US11800568B2 (en) | Method and apparatus for random access in repetition mode in wireless mobile communication system | |
US20240155689A1 (en) | Method and apparatus for random access in repetition mode in wireless mobile communication system | |
US20240147539A1 (en) | Method and apparatus for random access in repetition mode in wireless mobile communication system | |
US20240107616A1 (en) | Method and apparatus for performing connection resumption in wireless communication system | |
US20240121831A1 (en) | Method and apparatus for random access in wireless mobile communication system | |
US11800567B2 (en) | Method and apparatus for reduced capability terminal to perform random access using a plurality of PUCCH common configuration in mobile wireless communication system | |
US20240107614A1 (en) | Method and apparatus for performing small data transmission in wireless communication system | |
US20240107615A1 (en) | Method and apparatus for random access procedure for small data transmission in wireless communication system | |
US20240114583A1 (en) | Method and apparatus for performing uplink transmission based on configured grant in wireless communication system | |
US20230075091A1 (en) | Method and apparatus for reduced capability terminal to perform random access using a plurality of pusch common configuration in mobile wireless communication system | |
US20230076781A1 (en) | Method and apparatus for reduced capability terminal to perform random access and to receive system information block 2 using a plurality of search spaces and a plurality of control resource sets in mobile wireless communication system | |
US11991760B2 (en) | Method and apparatus for terminal to store and discard segmented radio resource control message in mobile wireless communication system | |
US11832333B2 (en) | Method and apparatus for resume procedure for data transfer in RRC_INACTIVE state in mobile wireless communication system | |
US20230119113A1 (en) | Method and apparatus for terminal in rrc_inactive to perform system information update in mobile wireless communication system | |
KR102517306B1 (en) | Method and Apparatus for terminal to receive random access response and perform shared channel transmission in mobile wireless communication system | |
US20230117028A1 (en) | Method and apparatus for terminal to determine reference paging cycle in mobile wireless communication system | |
US20230124679A1 (en) | Method and apparatus for terminal in rrc_inactive to perform extended drx operation in mobile wireless communication system | |
US20230121457A1 (en) | Method and apparatus for terminal in rrc_inactive to determine paging frame in mobile wireless communication system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |