CN113225730A - Method for UE capability information transfer supporting NR-U and user equipment thereof - Google Patents

Method for UE capability information transfer supporting NR-U and user equipment thereof Download PDF

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CN113225730A
CN113225730A CN202110145286.2A CN202110145286A CN113225730A CN 113225730 A CN113225730 A CN 113225730A CN 202110145286 A CN202110145286 A CN 202110145286A CN 113225730 A CN113225730 A CN 113225730A
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system information
unlicensed
cell
capability information
information
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CN113225730B (en
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蔡秋薇
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MediaTek Inc
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MediaTek Inc
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    • 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
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H04W8/205—Transfer to or from user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • 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
    • 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
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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

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  • Mobile Radio Communication Systems (AREA)

Abstract

A method of UE capability signaling supporting NR-U is proposed. The UE transfers UE capability information to the mobile communication network, and the UE capability information includes: whether the UE supports system information acquisition of an unlicensed cell. The UE receives a configuration from a serving cell of the mobile communication network, and the configuration includes information for system information acquisition of one or more unlicensed cells on a frequency. The UE obtains the system information of the one or more unlicensed cells on the frequency and reports the obtained system information to the serving cell or stores the obtained system information in the UE. The invention realizes the beneficial effects that the service cell acquires the system information of the unauthorized cell and performs proper configuration of the unauthorized cell on the UE.

Description

Method for UE capability information transfer supporting NR-U and user equipment thereof
Cross-referencing
The present invention claims priority from 35u.s.c. § 119: U.S. provisional application entitled "Methods for UE capability signaling", filed on 6/2/2020, application number 62/970,791; U.S. provisional application entitled "Methods for capability signaling", filed 24/4/2020, application No. 63/014,813; and U.S. application No. 17/148,135 entitled "UE Capability Signaling to Support 5G New Radio (NR) in unlicenced Spectrum (NR-U)" filed on 13/1, 2021, the entire contents of the related applications are incorporated herein by reference.
Technical Field
Embodiments of the present invention relate generally to wireless communications and, more particularly, to a method for UE capability signaling supporting 5G unlicensed spectrum New Radio (NR-U).
Background
Wireless communication networks have grown exponentially over the years. Long-Term Evolution (LTE) systems have higher peak data rates, lower latency, improved system capacity, and lower operating costs due to a simplified network architecture. The LTE System (also referred to as 4G System) also provides seamless integration with legacy wireless networks, such as GSM, CDMA and Universal Mobile Telecommunications System (UMTS). In LTE systems, an evolved universal terrestrial radio access network (E-UTRAN) includes a plurality of evolved Node bs (enodebs, or enbs) that communicate with a plurality of mobile stations, referred to as User Equipments (UEs). Third generation partnership project (The 3)rdgeneration partner project, 3GPP) networks typically include a fusion of 2G/3G/4G systems. As network designs are optimized, many improvements have been made based on the development of various standards. The Next Generation Mobile Network (NGMN) committee has decided to focus future NGMN activities on defining the end-to-end requirements of a 5G New Radio (NR) system.
In the 3GPP release 16(release 16) specification, support for 5G NR operating in unlicensed (unisense) spectrum (this function is also referred to as NR-U) is introduced, thus bringing 5G a number of options for flexible use of unlicensed spectrum. The NR-U supports licensed-assisted (licensed-assisted unlicensed and unlicensed spectrum independent use. in particular, independent NR-U enables 5G deployments with small cell deployments and can be operated by any vertical end user without obtaining licensed spectrum.this new functionality will enable a 5G NR to utilize both the 5GHz global band and the 6GHz band, thereby significantly increasing the 5G's spectral coverage.
Unlike licensed spectrum, any operator can access unlicensed bands as long as the operator complies with the regulations. Since there is no coordination between operators, it may happen that two cells deployed by two different operators are assigned the same physical cell ID. Therefore, the network may need assistance of the UE to acquire system information of neighboring cells to learn more information about cells deployed on the unlicensed frequency band (also referred to as unlicensed cells). However, according to the current 3GPP specifications and/or compliance with 5G/NR requirements, the network cannot know whether the UE supports UE capability information for acquiring system information of an unlicensed cell.
A solution is sought.
Disclosure of Invention
A UE capability information signaling method supporting NR-U is provided. The UE transmits UE capability information to the mobile communication network, wherein the UE capability information comprises whether the UE supports system information acquisition of an unauthorized cell. The UE receives a configuration from a serving cell of the mobile communication network, wherein the configuration includes information for system information acquisition of one or more unlicensed cells on a frequency. The UE acquires the system information of the one or more unlicensed cells on the frequency and reports the acquired system information to the serving cell or stores the acquired system information in the UE.
In one embodiment, reporting the acquired system information to the serving cell is performed in response to the serving cell requesting the UE for a CGI report. In another embodiment, storing the acquired system information in the UE is performed in response to a handover of the UE from the serving cell to one of the unlicensed cells. In yet another embodiment, storing the acquired system information in the UE is performed in response to the UE receiving an indication that system information of one or more unlicensed cells on the frequency has been transformed.
In one illustration, the UE capability information is set and reported per frequency band. The system information includes at least one of MIB and SIB 1. The SIB1 includes a CGI that includes at least one of a PLMN ID and a PCI. The UE capability information includes: a first indicator of whether the UE supports MIB acquisition on an unlicensed cell, a second indicator of whether the UE supports SIB1 acquisition on an unlicensed cell, and a third indicator of whether the UE supports CGI information acquisition from a neighboring unlicensed cell. The unlicensed cell is an NR-based unlicensed neighbor cell, and the serving cell is an NR-based licensed cell.
In another example, the UE receives a UE capability query message from a serving cell and sends a UE capability information message to the serving cell in response to receiving the UE capability query message, wherein the UE capability information is conveyed by the UE capability information message.
The invention provides a method for transmitting UE capability information supporting NR-U and user equipment thereof, which have the beneficial effects that a serving cell acquires the system information of an unauthorized cell and the UE is properly configured with the unauthorized cell by using the assistance of the UE.
Other embodiments and advantages are set forth in the detailed description that follows. This summary does not purport to define the invention. The invention is defined by the claims.
Drawings
The drawings illustrate embodiments of the invention, in which like numerals refer to like elements.
Figure 1 illustrates an exemplary mobile communication network supporting unlicensed spectrum according to one novel aspect.
Fig. 2 shows a simplified block diagram of a wireless device according to an embodiment of the invention.
Figure 3 illustrates a sequence flow for UE capability signaling to support NR-U between a UE and a 5G NR network in accordance with one novel aspect.
Fig. 4 illustrates a sequence flow for CGI acquisition and reporting between a UE and a 5G NR network in accordance with one novel aspect.
Fig. 5 illustrates a sequence flow for CGI acquisition between a UE and a 5G NR network in accordance with one novel aspect.
Fig. 6 illustrates a sequence flow for CGI acquisition between a UE and a 5G NR network in accordance with one novel aspect.
Figure 7 is a flow diagram of a method for NR-U supported UE capability signaling in accordance with one novel aspect.
Detailed Description
Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.
Figure 1 illustrates an exemplary mobile communication network 100 supporting unlicensed spectrum according to one novel aspect. The mobile communication network 100 may be a 5G NR network including a licensed frequency band (e.g., such as a licensed band) communicatively connected to the access network 120
Figure BDA0002929966910000041
Millimeter wave of) of the wireless network) 110. The access network 120 is connected to the 5G core network 130 through an NG interface, and more particularly, to a User Plane Function (UPF) through an NG User-Plane part (NG-u), and to a Mobility Management Function (AMF) through an NG control-Plane part (NG-c). One gNB may be connected to multiple UPFs/AMFs for load sharing and redundancy purposes.
In addition to gNB 121, there are multiple gNBs around UE 110, including gNB 101 and gNB 102 operating on unlicensed frequency bands (e.g., 5GHz or 6 GHz). Each of gNB 101 and gNB 102 may be deployed by the same operator of gNB 121 or may be deployed by a different operator than the operator of gNB 121. The gNB 121 may form at least one cell, which may be referred to as an NR-based licensed cell (i.e., a cell operating in a 5G NR licensed frequency band). Similarly, each of the gnbs 101 and 102 may form at least one cell, which may be referred to as an NR-based unlicensed cell (i.e., a cell operating on an unlicensed band).
The UE 110 may be a smartphone, a wearable device, an internet of things (IoT) device, a tablet, and the like, and may or may not support system information acquisition for unauthorized cells.
According to one novel aspect, if UE 110 supports system information acquisition of an unlicensed cell and is camped on a cell formed by gNB 121 (e.g., a primary cell (PCell) or a primary secondary cell (PSCell)), UE 110 may communicate to the serving cell UE capabilities regarding whether UE 110 supports system information acquisition of the unlicensed cell in a UE capabilities transfer procedure. Then, the gNB 121 configures the UE 110 to acquire system information of one or more unlicensed cells on the frequency, and the UE 110 reports the acquired system information to a serving cell or stores the acquired system information in the UE 110.
Specifically, the System Information includes at least one of a Master Information Block (MIB) and a System Information Block type 1 (SIB 1). In particular, SIB1 includes a Cell Global Identity (CGI), wherein the CGI includes at least one of a Public Land Mobile Network Identity (PLMN ID) and a Physical Cell Identity (PCI). With the CGI included in the reported system information, the mobile communication network 100 can learn more about the unauthorized cell and can solve the problem that two or more unauthorized cells deployed by different operators happen to be assigned the same PCI.
To further clarify, in the 5G NR, System Information may be classified into three categories including Minimum System Information (MSI) and Other System Information (OSI). The MSI includes the MIB and Remaining Minimum System Information (RMSI) including SIB1, and the OSI includes the Remaining SIBs including
Figure BDA0002929966910000051
In one embodiment, UE 110 may receive a configuration of system information acquisition from a serving cell for one or more neighboring unlicensed cells on a frequency via a Radio Resource Control (RRC) connection reconfiguration message and request UE 110 for CGI reporting according to the received configuration.
In another embodiment, the UE 110 may receive a configuration of system information acquisition for at least one target unlicensed cell on frequency from a serving cell via a handover command (e.g., an RRC connection reconfiguration message), and the UE 110 is requested to perform a handover from the serving cell to the target unlicensed cell according to the received configuration. Then, the UE 110 acquires system information of the target cell in response to the handover, and locally stores the acquired system information.
In another embodiment, the UE 110 may receive a configuration of system information acquisition for one or more unlicensed cells on a frequency from a serving cell via a message that includes an indication that the system information of the one or more unlicensed cells on the frequency has been transformed, and the UE is requested 110 to perform MIB reading and SIB1 reading according to the received configuration. UE 110 then acquires the new system information and stores the new system information locally.
Fig. 2 shows a simplified block diagram 200 of a wireless device (e.g., UE 201 and gNB 211) according to an embodiment of the invention. The gNB 211 has an antenna 215 that transmits and receives radio signals. A radio frequency RF transceiver module 214 (including a receiver and a transmitter) coupled to the antenna 215 receives RF signals from the antenna 215, converts the RF signals to baseband signals, and then transmits the baseband signals to the processor 213. The RF transceiver module 214 also converts a baseband signal received from the processor 213, converts the baseband signal into an RF signal, and then transmits to the antenna 215. Processor 213 processes the received baseband signals and invokes different functional blocks to perform functions in the gNB 211. Memory 212 stores program instructions and data 220 to control the operation of the gNB 211. In the example of fig. 2, the gNB 211 further includes a protocol stack 280 and a set of control functions and circuitry 290. The Protocol stack 280 includes an NAS layer communicating with an AMF/SMF/MME entity connected to a core network, a Radio Resource Control (RRC) layer for higher layer configuration and Control, a Packet Data Convergence Protocol (PDCP)/Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. In one example, the control function and circuitry 290 includes: a UE capability information inquiry circuit 291 that inquires UE capability information of the UE 201; and a system information request circuit 292 that prepares a configuration of one or more unlicensed cells for system information acquisition.
Similarly, the UE 201 has a memory 202, a processor 203, and an RF transceiver module 204. The RF transceiver module 204 is coupled to the antenna 205, receives an RF signal from the antenna 205, converts the RF signal into a baseband signal, and transmits the baseband signal to the processor 203. The RF transceiver module 204 also converts a received baseband signal from the processor 203 into an RF signal and transmits the RF signal to the antenna 205. The processor 203 processes the received baseband signals and invokes different functional modules and circuits to perform functions in the UE 201. The memory 202 stores program and data instructions 210 that are executed by the processor 203 to control the operation of the UE 201. Suitable processors include, by way of example, a special-purpose processor, a Digital Signal Processor (DSP), a plurality of microprocessors, one or more microprocessors and/or state machines associated with a DSP core, a controller, a microcontroller, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) circuit, and other types of Integrated Circuits (ICs). A processor associated with software may be used to implement and configure features of the UE 201.
The UE 201 also includes a protocol stack 260 and a set of control functions and control circuitry 270. The protocol stack 260 includes a NAS layer for communicating with the AMF/SMF/MME entity connected to the core network, an RRC layer for higher layer configuration and control, a PDCP/RLC layer, a MAC layer, and a PHY layer. The control function and circuitry 270 may be implemented and configured by software, firmware, hardware, and/or combinations thereof. When the functional modules and circuits 270 are executed by the processor 203 via program instructions included in the memory 202, the functional modules and circuits are controlled to interact with each other to allow the UE 201 to perform embodiments in the network, as well as functional tasks and features.
In one example, the control function modules and circuitry 270 includes UE capability information processing circuitry 271 that provides system information acquisition as to whether the UE 201 supports unlicensed cells and system information acquisition circuitry 272 that processes (e.g., reports or stores in the UE acquired system information to a serving cell) the acquired system information of the unlicensed cells.
Figure 3 illustrates a sequence flow for UE capability signaling to support NR-U between a UE 301 and a 5G NR network in accordance with one novel aspect. In step 311, the UE 301 receives a UE capability query (UE capability inquiry) message from the 5G NR network. When the 5G NR network needs (additional) UE radio access capability information, the 5G NR network may initiate the procedure to the UE in RRC CONNECTED (RRC _ CONNECTED). A 5G NR network should only acquire UE capabilities after Access Stratum (AS) security activation. In step 321, the UE 301 prepares UE capability information including information whether the UE 301 supports system information acquisition on an unlicensed cell. Specifically, the UE capability information may include: a first indicator (e.g., a "MIB-Acquisition-r 16" IE) of whether UE 301 supports acquiring MIB on an unlicensed cell; a second indicator (e.g., a "SIB 1-Acquisition-r 16" IE) of whether the UE 301 supports acquiring the SIB1 on the unlicensed cell, and a third indicator (e.g., a "CGI-Acquisition-r 16" IE) of whether the UE 301 supports acquiring the CGI information from the neighboring unlicensed cell. In step 331, the UE 301 transmits a UE capability information message including UE capability information to the 5G NR network.
Fig. 4 illustrates a sequence flow for CGI acquisition and reporting between a UE 401 and a 5G NR network in accordance with one novel aspect. In step 411, UE 401 receives an RRC reconfiguration (rrcrconfiguration) message with a configuration including information for system information acquisition of one or more unlicensed cells on a frequency. In one example, the configuration may be included in a "reportCGI-RequestNR" IE or a "reportCGI-RequestEUTRA" IE specified in 3GPP TS 38.331 (v16.3.1). In step 421, UE 401 sends an RRC reconfiguration complete (rrcreconfigurable complete) message to the 5G NR network. In step 431, UE 401 acquires system information of the unlicensed cell on the frequency. In step 441, UE 401 reports the acquired system information to the 5G NR network.
For further explanation, the system information acquisition referred to herein is intended to read the CGI information carried in SIB 1. To read the SIB1, the UE first needs to read the MIB carrying the Physical Downlink Control Channel (PDCCH) configuration (e.g., CORESET #0 and Type0-PDCCH configuration) of the SIB 1. Note that in NR-U, transmission is subject to Listen Before Talk (Listen Before Talk, LBT) results. To increase the likelihood of successful transmission of synchronization signal/physical broadcast channel (SS/PBCH) blocks, the concept of discovery burst windows in NR-U is introduced to increase the transmission opportunities for a given SS/PBCH block. Therefore, the UE needs to monitor multiple locations within the discovery burst window to read the PBCH of a given SS/PBCH block. This complicates the PBCH reading procedure for the UE compared to the licensed band.
More specifically, a discovery burst refers to a DL transmission burst that includes a set of signals and/or channels that are confined within a window and associated with a duty cycle. The discovery burst may be any of: (1) transmissions initiated by the eNB, including Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), and Cell-specific Reference signals (CRS), and may include non-zero power CSI Reference signals (CSI-RS); (2) a gNB-initiated transmission comprising at least one SS/PBCH block consisting of PSS, SSS, PBCH and related demodulation Reference Signal (DM-RS), and may also include a control resource set (CORESET), PDCCH for scheduled PDSCH with SIB1, and PDSCH carrying SIB1 and/or non-zero power CSI-RS.
When the SS/PBCH block is located in the synchronization grid (sync-raster), the UE determines the CORESET #0 frequency location in the same manner as the release 15 (R15) grant operation. Specifically, the UE reads PBCH in SS/PBCH block and uses the information (k) carried in MIBSSBAnd SSB-CORESET0 PRB) to determine the SS/PBCH block and CORESET #0The frequency offset between. In one embodiment, KSSB is the carrier number offset between subcarrier 0 of SSB and subcarrier 0 of CRB to calculate the subcarrier level offset between the first subcarrier of SSB and the first subcarrier of CORESET #0 (for scheduling RMSI). On the other hand, when the SS/PBCH block is not in the synchronization grid, the UE has to determine the frequency location of CORESET #0 in a more complex manner. Specifically, for SSBs that deviate from the synchronization grid for a given frequency, the UE determines which LBT sub-band it is within. Next, the UE determines the frequency of the SSB on the synchronization grid for the LBT subband. The UE then reads the PBCH from the SSB that deviates from the synchronization grid and uses the indicated kSSBAnd SSB-CORESET0 PRB offset to determine the position of CORESET0 as if the SSB were sent on a synchronous grid point.
Fig. 5 illustrates a sequence flow for CGI acquisition between a UE 501 and a 5G NR network, in accordance with one novel aspect. In step 511, the UE 501 receives a rrcreeconfiguration message with a configuration from a serving cell (i.e., a source cell) on a licensed band, wherein the configuration includes information for handover of the UE 501 from the serving cell to a target cell on an unlicensed band. In step 521, the UE 501 performs a random access procedure for the target cell. In step 531, the UE 501 sends an RRC reconfiguration complete (rrcconfigurationcomplete) message to the target cell after successfully completing the random access procedure. In step 541, the UE 501 acquires system information of a target cell on an unlicensed frequency band. That is, since the system information acquisition is triggered by the configuration of the handover information, the configuration of the handover information may also be interpreted as being for configuring the system information acquisition. In step 551, the UE 501 locally stores the acquired system information.
In one example, system information acquisition includes at least SIB1 reading, such that UE 501 can obtain the CGI from SIB1 and determine whether the target and source cells belong to the same PLMN. The UE 501 may determine to handover to the target cell if the target cell and the source cell belong to the same PLMN.
Fig. 6 illustrates a sequence flow for CGI acquisition between a UE 601 and a 5G NR network, in accordance with one novel aspect. In step 611, the UE 601 receives a rrcreeconfiguration message with a configuration from the serving cell, wherein the configuration includes information for system information acquisition of one or more unlicensed cells on the frequency. In one example, the serving cell may be a PCell or a PSCell. In step 621, the UE 601 transmits a rrcreeconfigurationcomplete message to the serving cell. In step 631, the UE 601 acquires system information of an unlicensed cell on a frequency. In step 641, the UE 601 reports the acquired system information report to the serving cell. In step 651, the UE 601 receives a message from the serving cell (e.g., via paging), wherein the message includes an indication that the system information of the unlicensed cell on the frequency has been transformed/modified. In step 661, UE 601 performs MIB reading and SIB1 reading to acquire new system information. In step 671, the UE 601 locally stores the new system information.
Figure 7 is a flow diagram of a method for NR-U supported UE capability signaling in accordance with one novel aspect. In step 701, the UE transfers UE capability information to the mobile communication network, wherein the UE capability information includes information on whether the UE supports system information acquisition of an unlicensed cell. In step 702, the UE receives a configuration from a serving cell of the mobile communication network, wherein the configuration includes information for system information acquisition of one or more unlicensed cells on a frequency. For example, the UE capability information in step 701 may be transferred to the same serving cell from which the configuration was received in step 702. Alternatively, the UE capability information in step 701 may be transferred to a serving cell different from the serving cell from which the configuration is received in step 702. In step 703, the UE acquires system information for one or more unlicensed cells on the frequency. In step 704, the UE reports the acquired system information to the serving cell or stores the acquired system information in the UE.
In one example, the UE capability information is set and reported per frequency band or per frequency band combination. In one example, the system information includes at least one of MIB and SIB1, and SIB1 includes a CGI including at least one of PLMN ID and PCI. In one example, the UE capability information includes: a first indicator of whether the UE supports MIB acquisition on an unlicensed cell, a second indicator of whether the UE supports SIB1 acquisition on an unlicensed cell, and a third indicator of whether the UE supports CGI information acquisition from a neighboring unlicensed cell. In one example, the unlicensed cell is an NR-based unlicensed neighbor cell and the serving cell is an NR-based licensed cell. In one example, a UE receives a UE capability query message from a serving cell and sends a UE capability information message to the serving cell in response to receiving the UE capability query message, wherein the UE capability information is conveyed by the UE capability information message.
In one embodiment, reporting the acquired system information to the serving cell is performed in response to the serving cell requesting the UE for a CGI report.
In another embodiment, storing the acquired system information in the UE is performed in response to a handover of the UE from the serving cell to one of the unlicensed cells.
In another embodiment, storing the acquired system information in the UE is performed in response to the UE receiving an indication that system information of one or more unlicensed cells on the frequency has been transformed.
Although the present invention has been described in connection with the specified embodiments for the purpose of illustration, the present invention is not limited thereto. Thus, various modifications, adaptations, and combinations of the various features of the described embodiments can be practiced without departing from the scope of the invention as set forth in the claims.

Claims (20)

1. A method of user equipment capability information transfer to support a fifth generation unlicensed spectrum new radio, comprising:
transmitting UE capability information to a mobile communication network by UE, wherein the UE capability information comprises whether the UE supports system information acquisition of an unauthorized cell;
receiving, by the UE, a configuration from a serving cell of the mobile communication network, wherein the configuration includes information for system information acquisition of one or more unlicensed cells on a frequency;
obtaining, by the UE, the system information for the one or more unlicensed cells on the frequency; and
reporting, by the UE, the acquired system information to the serving cell or storing the acquired system information in the UE.
2. The method of user equipment capability information transfer for supporting new radio over unlicensed spectrum of fifth generation claim 1, wherein the UE capability information is set and reported per frequency band or per frequency band combination.
3. The method of user equipment capability information transfer for supporting new radio over unlicensed spectrum of fifth generation claim 1, wherein the system information includes at least one of a master information block and a system information block type 1.
4. The method of claim 3, wherein the system information block type 1 comprises a cell global identity, wherein the cell global identity comprises at least one of a public land mobile network identity and a physical cell identity.
5. The method of claim 1, wherein the UE capability information comprises: the UE may include a first indicator of whether the UE supports acquisition of a master information block on an unlicensed cell, a second indicator of whether the UE supports acquisition of a system information block type 1 on an unlicensed cell, and a third indicator of whether the UE supports cell global identity information acquisition from a neighboring unlicensed cell.
6. The method of user equipment capability information transfer for supporting new radio over unlicensed spectrum of fifth generation claim 1, further comprising:
receiving, by the UE, a UE capability query message from the mobile communication network; and
in response to receiving the UE capability query message, transmitting a UE capability information message to the mobile communication network,
wherein the UE capability information is transferred through the UE capability information message.
7. The method of claim 1, wherein reporting the acquired system information to the serving cell is performed in response to the serving cell requesting the UE to perform a cell global identity report.
8. The method of claim 1, wherein storing the obtained system information in the UE is performed in response to the UE being handed over from the serving cell to one of the one or more unlicensed cells.
9. The method of claim 1, wherein storing the system information obtained in the UE is performed in response to the UE receiving an indication that the system information for the one or more unlicensed cells on the frequency has been transformed.
10. The method of claim 1, wherein the one or more unlicensed cells are unlicensed neighbor cells based on a new radio and the serving cell is a licensed cell based on the new radio.
11. A user equipment supporting user equipment capability information transfer for a fifth generation unlicensed spectrum new radio, comprising:
a transmitter for communicating UE capability information to a mobile communication network, wherein the UE capability information includes: whether the UE supports system information acquisition of an unauthorized cell;
a receiver for receiving a configuration from a serving cell of the mobile communication network, wherein the configuration comprises information for system information acquisition of one or more unlicensed cells on a frequency; and obtaining the system information of the one or more unlicensed cells on the frequency; and
system information processing circuitry to report the acquired system information to the serving cell or to store the acquired system information in the UE.
12. The user equipment supporting user equipment capability information transfer for new radio over unlicensed spectrum of fifth generation claim 11, wherein the UE capability information is configured and reported per frequency band or per frequency band combination.
13. The user equipment capable of user equipment capability information transfer for a fifth generation unlicensed spectrum new radio according to claim 11, wherein the system information includes at least one of a master information block and a system information block type 1.
14. The UE supporting UE capability information transfer for new radio over unlicensed spectrum of claim 13, wherein the system information block type 1 comprises a cell global identity, wherein the cell global identity comprises at least one of a public land mobile network identity and a physical cell identity.
15. The UE capable of UE capability information transfer for supporting new radio over unlicensed fifth generation spectrum according to claim 11, wherein the UE capability information includes: a first indicator of whether the UE supports MIB acquisition on an unlicensed cell, a second indicator of whether the UE supports SIB1 acquisition on an unlicensed cell, and a third indicator of whether the UE supports CGI information acquisition from a neighboring unlicensed cell.
16. The user equipment supporting user equipment capability information transfer for a fifth generation unlicensed spectrum new radio according to claim 11,
the receiver is further configured to receive a UE capability query message from the mobile communication network; and
the transmitter is further configured to transmit a UE capability information message to the mobile communication network, in response to receiving the UE capability query message,
wherein the UE capability information is transferred through the UE capability information message.
17. The UE capable of UE capability information delivery for new radio over unlicensed fifth generation spectrum of claim 11, wherein reporting the acquired system information to the serving cell is performed in response to the serving cell requesting the UE to perform a cell global identity report.
18. The UE capable of UE capability information transfer for new radio over unlicensed spectrum of claim 11, wherein the storing the system information obtained in the UE is performed in response to the UE handing off from the serving cell to one of the one or more unlicensed cells.
19. The UE capable of UE capability information transfer for new radio over unlicensed spectrum of claim 11, wherein the storing the system information obtained in the UE is performed in response to the UE receiving an indication that the system information for the one or more unlicensed cells on the frequency has been transformed.
20. The UE capable of UE capability information transfer for new radio over unlicensed spectrum of claim 11, wherein the one or more unlicensed cells are unlicensed neighbor cells based on the new radio and the serving cell is a licensed cell based on the new radio.
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US17/148,135 US11528595B2 (en) 2020-02-06 2021-01-13 UE capability signaling to support 5G new radio (NR) in unlicensed spectrum (NR-U)
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