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WO2018227461A1 - Techniques et appareils pour une configuration de groupe de cellules secondaires en mode à double connectivité - Google Patents

Techniques et appareils pour une configuration de groupe de cellules secondaires en mode à double connectivité Download PDF

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Publication number
WO2018227461A1
WO2018227461A1 PCT/CN2017/088404 CN2017088404W WO2018227461A1 WO 2018227461 A1 WO2018227461 A1 WO 2018227461A1 CN 2017088404 W CN2017088404 W CN 2017088404W WO 2018227461 A1 WO2018227461 A1 WO 2018227461A1
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WIPO (PCT)
Prior art keywords
node
user equipment
radio resource
resource control
scg
Prior art date
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Ceased
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PCT/CN2017/088404
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English (en)
Inventor
Huichun LIU
Gavin Bernard Horn
Luis Lopes
Xipeng Zhu
Ozcan Ozturk
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Qualcomm Inc
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Qualcomm Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/CN2017/088404 priority Critical patent/WO2018227461A1/fr
Priority to CN202211189900.6A priority patent/CN115515257B/zh
Priority to EP18818755.3A priority patent/EP3639611B1/fr
Priority to PCT/CN2018/091154 priority patent/WO2018228451A1/fr
Priority to CN201880039417.5A priority patent/CN110771254B/zh
Priority to US16/615,105 priority patent/US11606729B2/en
Publication of WO2018227461A1 publication Critical patent/WO2018227461A1/fr
Anticipated expiration legal-status Critical
Priority to US18/178,624 priority patent/US12075289B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00698—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using different RATs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • aspects of the present disclosure generally relate to wireless communication, and more particularly to techniques and apparatuses for dual-connectivity mode secondary cell group configuration.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc. ) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a UE may communicate with a BS via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a new radio (NR) BS, a 5G Node B, and/or the like.
  • New radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread ODFM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • CP-OFDM OFDM with a cyclic prefix
  • SC-FDM e.g., also known as discrete Fourier transform spread ODFM (DFT-s-OFDM)
  • MIMO multiple-input multiple-output
  • a method for wireless communication may include transmitting a communication to reconfigure a secondary cell group (SCG) bearer associated with a second node and a user equipment in a dual-connectivity mode in connection with transferring the user equipment to a particular radio resource control communication state, wherein the second node is configured to store a user equipment context in connection with the user equipment operating in the particular radio resource control communication state.
  • the method may include receiving, from the second node, an indication of downlink data for the user equipment based at least in part on reconfiguring the SCG bearer.
  • a first node may include a memory coupled to one or more processors.
  • the one or more processors may be configured to transmit a communication to reconfigure an SCG bearer associated with a second node and a user equipment in a dual-connectivity mode in connection with transferring the user equipment to a particular radio resource control communication state, wherein the second node is configured to store a user equipment context in connection with the user equipment operating in the particular radio resource control communication state.
  • the one or more processors may be configured to receive, from the second node, an indication of downlink data for the user equipment based at least in part on reconfiguring the SCG bearer.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a first node, may cause the one or more processors to transmit a communication to reconfigure an SCG bearer associated with a second node and a user equipment in a dual-connectivity mode in connection with transferring the user equipment to a particular radio resource control communication state, wherein the second node is configured to store a user equipment context in connection with the user equipment operating in the particular radio resource control communication state.
  • the one or more instructions when executed by the one or more processors, may cause the one or more processors to receive, from the second node, an indication of downlink data for the user equipment based at least in part on reconfiguring the SCG bearer.
  • an apparatus for wireless communication may include means for transmitting a communication to reconfigure an SCG bearer associated with a node and a user equipment in a dual-connectivity mode in connection with transferring the user equipment to a particular radio resource control communication state, wherein the node is configured to store a user equipment context in connection with the user equipment operating in the particular radio resource control communication state.
  • the apparatus may include means for receiving, from the node, an indication of downlink data for the user equipment based at least in part on reconfiguring the SCG bearer.
  • a method may include transferring, based at least in part on an instruction from a first node, from a first radio resource control communication state to a second radio resource control communication state, wherein a user equipment is connected to a second node using a secondary cell group (SCG) bearer in a dual-connectivity mode, and wherein the user equipment stores a user equipment context and controls mobility in the second radio resource control communication state.
  • the method may include receiving, based at least in part on receiving paging from the first node triggered by downlink data being received at the second node, the downlink data from the first node or a third node.
  • a user equipment may include a memory coupled to one or more processors.
  • the one or more processors may be configured to transfer, based at least in part on an instruction from a first node, from a first radio resource control communication state to a second radio resource control communication state, wherein the user equipment is connected to a second node using an SCG bearer in a dual-connectivity mode, and wherein the user equipment stores a user equipment context and controls mobility in the second radio resource control communication state.
  • the one or more processors may be configured to receive, based at least in part on receiving paging from the first node triggered by downlink data being received at the second node, the downlink data from the first node or a third node.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a user equipment, may cause the one or more processors to transfer, based at least in part on an instruction from a first node, from a first radio resource control communication state to a second radio resource control communication state, wherein the user equipment is connected to a second node using an SCG bearer in a dual-connectivity mode, and wherein the user equipment stores a user equipment context and controls mobility in the second radio resource control communication state.
  • the one or more instructions when executed by the one or more processors, may cause the one or more processors to receive, based at least in part on receiving paging from the first node triggered by downlink data being received at the second node, the downlink data from the first node or a third node.
  • an apparatus for wireless communication may include means for transferring, based at least in part on an instruction from a first node, from a first radio resource control communication state to a second radio resource control communication state, wherein the apparatus is connected to a second node using an SCG bearer in a dual-connectivity mode, and wherein the apparatus stores a user equipment context and controls mobility in the second radio resource control communication state.
  • the apparatus may include means for receiving, based at least in part on receiving paging from the first node triggered by downlink data being received at the second node, the downlink data from the first node or a third node.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with certain aspects of the present disclosure.
  • Fig. 2 shows a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with certain aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network, in accordance with certain aspects of the present disclosure.
  • Fig. 4 is a block diagram conceptually illustrating two example subframe formats with the normal cyclic prefix, in accordance with certain aspects of the present disclosure.
  • Fig. 5 illustrates an example logical architecture of a distributed radio access network (RAN) , in accordance with certain aspects of the present disclosure.
  • RAN radio access network
  • Fig. 6 illustrates an example physical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • Figs. 7A-7C are diagrams illustrating an example of dual-connectivity mode secondary cell group configuration, in accordance with various aspects of the present disclosure.
  • Figs. 8A-8C are diagrams illustrating an example of dual-connectivity mode secondary cell group configuration, in accordance with various aspects of the present disclosure.
  • Fig. 9 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Fig. 10 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • An access point may comprise, be implemented as, or known as NodeB, Radio Network Controller ( “RNC “) , eNodeB (eNB) , Base Station Controller (“BSC “) , Base Transceiver Station ( “BTS “) , Base Station ( “BS “) , Transceiver Function (“TF “) , Radio Router, Radio Transceiver, Basic Service Set ( “BSS “) , Extended Service Set ( “ESS “) , Radio Base Station ( “RBS “) , Node B (NB) , gNB, 5G NB, NR BS, Transmit Receive Point (TRP) , or some other terminology.
  • An access terminal may comprise, be implemented as, or be known as an access terminal, a subscriber station, a subscriber unit, a mobile station, a remote station, a remote terminal, a user terminal, a user agent, a user device, user equipment (UE) , a user station, a wireless node, or some other terminology.
  • an access terminal may comprise a cellular telephone, a smart phone, a cordless telephone, a Session Initiation Protocol ( “SIP” ) phone, a wireless local loop ( “WLL” ) station, a personal digital assistant ( “PDA” ) , a tablet, a netbook, a smartbook, an ultrabook, a handheld device having wireless connection capability, a Station ( “STA” ) , or some other suitable processing device connected to a wireless modem.
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • a phone e.g., a cellular phone, a smart phone
  • a computer e.g., a desktop
  • a portable communication device e.g., a portable computing device (e.g., a laptop, a personal data assistant, a tablet, a netbook, a smartbook, an ultrabook)
  • wearable device e.g., smart watch, smart glasses, smart bracelet, smart wristband, smart ring, smart clothing, etc.
  • medical devices or equipment e.g., biometric sensors/devices
  • an entertainment device e.g., music device, video device, satellite radio, gaming device, etc.
  • the node is a wireless node.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered machine-type communication (MTC) UEs, which may include remote devices that may communicate with a base station, another remote device, or some other entity.
  • MTC machine-type communication
  • Machine type communications may refer to communication involving at least one remote device on at least one end of the communication and may include forms of data communication which involve one or more entities that do not necessarily need human interaction.
  • MTC UEs may include UEs that are capable of MTC communications with MTC servers and/or other MTC devices through Public Land Mobile Networks (PLMN) , for example. Examples of MTC devices include sensors, meters, location tags, monitors, drones, robots/robotic devices, etc.
  • MTC UEs, as well as other types of UEs may be implemented as NB-IoT (narrowband internet of things) devices.
  • aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • Fig. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be practiced.
  • the network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • Wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G NB, an access point, a TRP, etc.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the access network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, etc.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, such as sensors, meters, monitors, location tags, etc., that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices.
  • Some UEs may be considered a Customer Premises Equipment (CPE) .
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a dashed line with double arrows indicates potentially interfering transmissions between a UE and a BS.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • a scheduling entity e.g., a base station
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more subordinate entities (e.g., one or more other UEs) . In this example, the UE is functioning as a scheduling entity, and other UEs utilize resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network. In a mesh network example, UEs may optionally communicate directly with one another in addition to communicating with the scheduling entity.
  • P2P peer-to-peer
  • mesh network UEs may optionally communicate directly with one another in addition to communicating with the scheduling entity.
  • a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.
  • Fig. 1 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) , etc. ) and control information (e.g., CQI requests, grants, upper layer signaling, etc. ) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the CRS) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine RSRP, RSSI, RSRQ, CQI, etc.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, etc. ) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc. ) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, etc.
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • one or more components of UE 120 may be included in a housing. Controllers/processors 240 and 280 and/or any other component (s) in Fig. 2 may direct the operation at base station 110 and UE 120, respectively, to perform dual-connectivity mode secondary cell group configuration. For example, controller/processor 240 and/or other processors and modules at base station 110, may perform or direct operations of base station 110 to perform dual-connectivity mode secondary cell group configuration. For example, controller/processor 240 and/or other controllers/processors and modules at base station 110 may perform or direct operations of, for example, process 900 of Fig. 9 and/or other processes as described herein.
  • controller/processor 280 and/or other processors and modules at UE 120 may perform or direct operations of UE 120 to perform dual-connectivity mode secondary cell group configuration.
  • controller/processor 280 and/or other controllers/processors and modules at UE 120 may perform or direct operations of, for example, process 1000 of Fig. 10 and/or other processes as described herein.
  • one or more of the components shown in Fig. 2 may be employed to perform process 900 of Fig. 9, process 1000 of Fig. 10, and/or other processes for the techniques described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • Fig. 2 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 2.
  • Fig. 3 shows an example frame structure 300 for FDD in a telecommunications system (e.g., LTE) .
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames.
  • Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms) ) and may be partitioned into 10 subframes with indices of 0 through 9.
  • Each subframe may include two slots.
  • Each radio frame may thus include 20 slots with indices of 0 through 19.
  • Each slot may include L symbol periods, e.g., seven symbol periods for a normal cyclic prefix (as shown in Fig. 3) or six symbol periods for an extended cyclic prefix.
  • the 2L symbol periods in each subframe may be assigned indices of 0 through 2L–1.
  • a wireless communication structure may refer to a periodic time-bounded communication unit defined by a wireless communication standard and/or protocol.
  • a BS may transmit a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) on the downlink in the center of the system bandwidth for each cell supported by the BS.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the PSS and SSS may be transmitted in symbol periods 6 and 5, respectively, in subframes 0 and 5 of each radio frame with the normal cyclic prefix, as shown in Fig. 3.
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the BS may transmit a cell-specific reference signal (CRS) across the system bandwidth for each cell supported by the BS.
  • CRS cell-specific reference signal
  • the CRS may be transmitted in certain symbol periods of each subframe and may be used by the UEs to perform channel estimation, channel quality measurement, and/or other functions.
  • the BS may also transmit a physical broadcast channel (PBCH) in symbol periods 0 to 3 in slot 1 of certain radio frames.
  • PBCH physical broadcast channel
  • the PBCH may carry some system information.
  • the BS may transmit other system information such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain subframes.
  • SIBs system information blocks
  • PDSCH physical downlink shared channel
  • the BS may transmit control information/data on a physical downlink control channel (PDCCH) in the first B symbol periods of a subframe, where B may be configurable for each subframe.
  • the BS may transmit traffic data and/or other data on the PDSCH in the remaining symbol periods of each subframe.
  • a Node B may transmit these or other signals in these locations or in different locations of the subframe.
  • Fig. 3 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 3.
  • Fig. 4 shows two example subframe formats 410 and 420 with the normal cyclic prefix.
  • the available time frequency resources may be partitioned into resource blocks.
  • Each resource block may cover 12 subcarriers in one slot and may include a number of resource elements.
  • Each resource element may cover one subcarrier in one symbol period and may be used to send one modulation symbol, which may be a real or complex value.
  • Subframe format 410 may be used for two antennas.
  • a CRS may be transmitted from antennas 0 and 1 in symbol periods 0, 4, 7, and 11.
  • a reference signal is a signal that is known a priori by a transmitter and a receiver and may also be referred to as a pilot signal.
  • a CRS is a reference signal that is specific for a cell, e.g., generated based at least in part on a cell identity (ID) .
  • ID cell identity
  • Subframe format 420 may be used with four antennas.
  • a CRS may be transmitted from antennas 0 and 1 in symbol periods 0, 4, 7, and 11 and from antennas 2 and 3 in symbol periods 1 and 8.
  • a CRS may be transmitted on evenly spaced subcarriers, which may be determined based at least in part on cell ID.
  • CRSs may be transmitted on the same or different subcarriers, depending on their cell IDs.
  • resource elements not used for the CRS may be used to transmit data (e.g., traffic data, control data, and/or other data) .
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • An interlace structure may be used for each of the downlink and uplink for FDD in certain telecommunications systems (e.g., LTE) .
  • Q interlaces with indices of 0 through Q –1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value.
  • Each interlace may include subframes that are spaced apart by Q frames.
  • interlace q may include subframes q, q + Q, q + 2Q, etc., where q ⁇ ⁇ 0, ..., Q-1 ⁇ .
  • the wireless network may support hybrid automatic retransmission request (HARQ) for data transmission on the downlink and uplink.
  • HARQ hybrid automatic retransmission request
  • a transmitter e.g., a BS
  • a receiver e.g., a UE
  • all transmissions of the packet may be sent in subframes of a single interlace.
  • each transmission of the packet may be sent in any subframe.
  • a UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, and/or the like. Received signal quality may be quantified by a signal-to-noise-and-interference ratio (SINR) , or a reference signal received quality (RSRQ) , or some other metric.
  • SINR signal-to-noise-and-interference ratio
  • RSRQ reference signal received quality
  • the UE may operate in a dominant interference scenario in which the UE may observe high interference from one or more interfering BSs.
  • aspects of the examples described herein may be associated with LTE technologies, aspects of the present disclosure may be applicable with other wireless communication systems, such as NR or 5G technologies.
  • New radio may refer to radios configured to operate according to a new air interface (e.g., other than Orthogonal Frequency Divisional Multiple Access (OFDMA) -based air interfaces) or fixed transport layer (e.g., other than Internet Protocol (IP) ) .
  • NR may utilize OFDM with a CP (herein referred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • OFDM Orthogonal Frequency Divisional Multiple Access
  • IP Internet Protocol
  • NR may, for example, utilize OFDM with a CP (herein referred to as CP-OFDM) and/or discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • CP-OFDM OFDM with a CP
  • DFT-s-OFDM discrete Fourier transform spread orthogonal frequency-division multiplexing
  • NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g., 80 megahertz (MHz) and beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 60 gigahertz (GHz)) , massive MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra reliable low latency communications (URLLC) service.
  • eMBB Enhanced Mobile Broadband
  • mmW millimeter wave
  • mMTC massive MTC
  • URLLC ultra reliable low latency communications
  • NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 75 kilohertz (kHz) over a 0.1 ms duration.
  • Each radio frame may include 50 subframes with a length of 10 ms. Consequently, each subframe may have a length of 0.2 ms.
  • Each subframe may indicate a link direction (e.g., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched.
  • Each subframe may include DL/UL data as well as DL/UL control data.
  • UL and DL subframes for NR may be as described in more detail below with respect to Figs. 7 and 8.
  • NR may support a different air interface, other than an OFDM-based interface.
  • NR networks may include entities such central units or distributed units.
  • the RAN may include a central unit (CU) and distributed units (DUs) .
  • a NR BS e.g., gNB, 5G Node B, Node B, transmit receive point (TRP) , access point (AP)
  • NR cells can be configured as access cells (ACells) or data only cells (DCells) .
  • the RAN e.g., a central unit or distributed unit
  • DCells may be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection/reselection, or handover. In some cases, DCells may not transmit synchronization signals—in some case cases DCells may transmit SS.
  • NR BSs may transmit downlink signals to UEs indicating the cell type. Based at least in part on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based at least in part on the indicated cell type.
  • Fig. 4 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 4.
  • a 5G access node 506 may include an access node controller (ANC) 502.
  • the ANC may be a central unit (CU) of the distributed RAN 500.
  • the backhaul interface to the next generation core network (NG-CN) 504 may terminate at the ANC.
  • the backhaul interface to neighboring next generation access nodes (NG-ANs) may terminate at the ANC.
  • the ANC may include one or more TRPs 508 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term) .
  • TRPs 508 which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term.
  • TRPs 508 which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term
  • the TRPs 508 may be a distributed unit (DU) .
  • the TRPs may be connected to one ANC (ANC 502) or more than one ANC (not illustrated) .
  • ANC 502 ANC 502
  • RaaS radio as a service
  • a TRP may include one or more antenna ports.
  • the TRPs may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the local architecture of RAN 500 may be used to illustrate fronthaul definition.
  • the architecture may be defined that support fronthauling solutions across different deployment types.
  • the architecture may be based at least in part on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • the architecture may share features and/or components with LTE.
  • the next generation AN (NG-AN) 510 may support dual connectivity with NR.
  • the NG-AN may share a common fronthaul for LTE and NR.
  • the architecture may enable cooperation between and among TRPs 508. For example, cooperation may be preset within a TRP and/or across TRPs via the ANC 502. According to aspects, no inter-TRP interface may be needed/present.
  • a dynamic configuration of split logical functions may be present within the architecture of RAN 500.
  • the PDCP, RLC, MAC protocol may be adaptably placed at the ANC or TRP.
  • a BS may include a central unit (CU) (e.g., ANC 502) and/or one or more distributed units (e.g., one or more TRPs 508) .
  • CU central unit
  • distributed units e.g., one or more TRPs 508 .
  • Fig. 5 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 5.
  • FIG. 6 illustrates an example physical architecture of a distributed RAN 600, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 602 may host core network functions.
  • the C-CU may be centrally deployed.
  • C-CU functionality may be offloaded (e.g., to advanced wireless services (AWS) ) , in an effort to handle peak capacity.
  • AWS advanced wireless services
  • a centralized RAN unit (C-RU) 604 may host one or more ANC functions.
  • the C-RU may host core network functions locally.
  • the C-RU may have distributed deployment.
  • the C-RU may be closer to the network edge.
  • a distributed unit (DU) 606 may host one or more TRPs.
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • Fig. 6 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 6.
  • a UE may transfer from a first radio resource control (RRC) connection state to a second RRC connection state.
  • RRC radio resource control
  • the UE may transfer from an RRC connected state to an RRC idle state to improve UE performance and/or network performance, relative to remaining in the RRC connected state when the UE is not to communicate data with the network for a period of time.
  • the UE and a node of a network e.g., a base station
  • the UE may transfer from an RRC connected state to a particular type of RRC connection state, which may be termed an RRC inactive state, wherein the UE and/or the network maintains at least a portion of configuration information to enable a reduced amount of network traffic to resume an RRC connection after entering the particular RRC connection state.
  • a particular type of RRC connection state which may be termed an RRC inactive state
  • the UE may connect to multiple nodes of a network, such as a master node, a secondary node, and/or the like.
  • the master node may control paging for the UE.
  • a set of bearers may be established for the UE and the nodes.
  • a master cell group bearer may be established for a first node
  • a secondary cell group (SCG) bearer may be established for a second node.
  • RRC connection state e.g., RRC inactive
  • the first node may perform a paging procedure
  • the UE may resume a connection
  • the UE may receive the data.
  • the first node may not be triggered to perform the paging procedure for the UE.
  • Some aspects, described herein, may perform dual-connectivity mode secondary cell group configuration to enable paging when downlink data is to be provided to a UE.
  • a UE may be enabled to utilize an RRC inactive state for a dual-connectivity mode to reduce a utilization of network resources, such as signaling resources, and to reduce a network latency relative to utilizing an RRC idle state.
  • Figs. 7A-7C are diagrams illustrating an example 700 of dual-connectivity mode secondary cell configuration, in accordance with various aspects of the present disclosure.
  • example 700 includes a UE 702 (e.g., which may correspond to UE 120) , which is operating in a dual-connectivity mode; a node 704-1 (e.g., which may correspond to BS 110) , which may be a master node; and a node 704-2 (e.g., which may correspond to BS 110) , which may be a secondary node.
  • secondary node 704-2 may support a different radio access technology (RAT) than master node 704-1.
  • RAT radio access technology
  • This type of dual-connectivity may be referred to as “multi-RAT dual-connectivity, ” “dual-connectivity, ” and/or the like.
  • UE 702 may operate in an RRC connected state.
  • node 704-1 may transmit an Xn/X2 (interface) message to node 704-2 to request an SCG data inactivity status report for an SCG bearer associated with node 704-2 and UE 702.
  • node 704-1 may receive an Xn/X2 message including an SCG data inactivity report, and node 704-1 may determine that UE 702 is to transfer from the RRC connected state to an RRC inactive state, such as based at least in part on the inactivity report identifying that UE 702 is not receiving data from or transmitting data to a network.
  • UE 702 may be configured to transfer to another type of RRC state where node 704-1 maintains a UE context, such as an RRC light connection state, an RRC semi-connected state, and/or the like.
  • node 704-1 may reconfigure an SCG bearer associated with UE 702 and node 704-2.
  • node 704-1 and node 704-2 may exchange Xn/X2 modification request/response messages to reconfigure the SCG bearer associated with node 704-2 and UE 702 to an SCG split bearer associated with node 704-1, node 704-2, and UE 702.
  • the SCG split bearer may be anchored by node 704-2 and may be configured to cause downlink data from node 704-2 to be provided to node 704-1 to trigger node 704-1 to perform network paging for UE 702.
  • node 704-1 and UE 702 may exchange RRC messages 716, 718, and 720 to transfer UE 702 from the RRC connected state to the RRC inactive state.
  • node 704-1 may perform a first step of requesting whether UE 702 can transfer to the RRC inactive state and a second step of instructing UE 702 to transfer to the RRC inactive state.
  • case B e.g., a one-step RRC message transmission
  • node 704-1 may transmit a single RRC message 722 to transfer UE 702 from the RRC connected state to the RRC inactive state.
  • node 704-1 may cause UE 702 to release to an RRC inactive state without node 704-1 requesting permission to cause UE 702 to transfer to the RRC inactive state.
  • UE 702 and/or node 704-1 may maintain at least a portion of RRC configuration information in the RRC inactive state.
  • node 704-1 may store a UE context associated with UE 702 to enable UE 702 to resume an RRC connection at a subsequent time with a reduced signaling overhead relative to resuming an RRC connection from an RRC idle mode.
  • UE 702 may be operating in the RRC inactive state.
  • node 704-1 may transmit an Xn/X2 suspend message to suspend the SCG split bearer to cause downlink data directed to node 704-2 to be provided to node 704-1 to trigger radio access network paging.
  • node 704-1 may transmit a set of messages to reconfigure the SCG bearer to node 704-1 to receive an indication of downlink data received at node 704-2 and intended for UE 702.
  • UE 702 may operate in the RRC inactive state (e.g., based at least in part on node 704-1 causing UE 702 to transfer to the RRC inactive state) .
  • node 704-2 may receive downlink data for UE 702 from a data source 732 associated with the network.
  • node 704-2 may provide an indication of the downlink data to node 704-1 to trigger radio access network paging by node 704-1.
  • node 704-1 may receive an indication of the downlink data.
  • node 704-1 may receive a portion of the downlink data (e.g., an Xn/X2 downlink packet data convergence protocol (PDCP) protocol data unit (PDU) message) , and may initiate paging for UE 702.
  • PDCP packet data convergence protocol
  • PDU protocol data unit
  • node 704-1 may buffer the PDCP PDU for paging, and may page UE 702 based at least in part on buffering the PDCP PDU.
  • node 704-1 may cause a connection to be resumed for UE 702 based at least in part on paging UE 702.
  • node 704-1 may exchange Xn/X2 messages with node 704-2 to resume the connection for UE 702.
  • a portion of configuration information stored by node 704-1 and/or node 704-2 may be used to resume the connection for UE 702.
  • node 704-1 may use a UE context stored based at least in part on UE 702 being transferred from the RRC connected state to cause UE 702 to resume a connection with node 704-1 to receive data from node 704-1.
  • node 704-1 may provide the downlink data to UE 702.
  • node 704-1 may provide a portion of the downlink data to UE 702
  • node 704-2 may provide a portion of the downlink data to UE 702 (e.g., directly via an air interface) after node 704-1 performs paging.
  • node 704-2 may receive downlink data and may transmit a PDCP PDU message to node 704-1 to cause node 704-1 to trigger paging for UE 702.
  • node 704-1 may trigger RAN paging at serving node 750, and based at least in part on the RAN paging may transmit another paging message for UE 702.
  • node 704-2 may directly trigger RAN paging at serving node 750.
  • node 704-1 and serving node 750 may transmit paging to UE 702.
  • node 704-1 may provide a UE context to enable UE 702 to resume an RRC connection with serving node 750.
  • node 704-1 may trigger node 704-2 to release as secondary node in the dual connectivity configuration, and to forward downlink PDCP service data units (SDUs) to serving node 750 via node 704-1 to enable serving node 750 to provide downlink data to UE 702, as shown by reference number 782.
  • serving node 750, node 704-1, node 704-2, and data source 732 may perform a path switch procedure to enable serving node 750 to continue providing downlink data to UE 702.
  • Figs. 7A-7C are provided as examples. Other examples are possible and may differ from what was described with respect to Figs. 7A-7C.
  • Figs. 8A-8C are diagrams illustrating an example 800 of dual-connectivity mode secondary cell group configuration, in accordance with various aspects of the present disclosure.
  • example 800 includes a UE 802 (e.g., which may correspond to UE 120) ; a node 804-1 (e.g., which may correspond to BS 110) , which may be a master node; and a node 804-2 (e.g., which may correspond to BS 110) , which may be a secondary node.
  • UE 802 e.g., which may correspond to UE 120
  • node 804-1 e.g., which may correspond to BS 110
  • node 804-2 e.g., which may correspond to BS 110
  • UE 802 may operate in an RRC connected state.
  • node 804-1 and node 804-2 may exchange Xn/X2 SCG data inactivity status report request/response messages.
  • node 804-1 may transmit an RRC release message to UE 802 to cause UE 802 to transfer to the RRC inactive state, as shown by reference number 814.
  • node 804-1 may transmit an Xn/X2 suspend message to reconfigure an SCG bearer associated with node 804-2 and UE 802.
  • node 804-1 may cause node 804-2 to suspend the SCG bearer.
  • the Xn/X2 suspend message may indicate that UE 802 is transferring to the RRC inactive state, and may trigger node 804-2 to provide a downlink data indicator to node 804-1 based at least in part on node 804-2 receiving downlink data for UE 802.
  • UE 802 may operate in the RRC inactive state.
  • node 804-2 may receive downlink data from a data source 822 for UE 802.
  • node 804-2 may buffer PDCP PDUs for the downlink data and may provide a downlink data indicator (e.g., via an Xn/X2 message) to node 804-1 to trigger paging.
  • node 804-1 can determine that downlink data is received at node 804-2 for transmission to UE 802 without receiving a portion of the downlink data via an SCG split bearer and/or without reconfiguring an SCG bearer as a split bearer in connection with the transition to RRC inactive state.
  • node 804-1 may page UE 802 and trigger UE 802 to resume a connection with node 804-2.
  • node 804-2 may transmit the downlink data to UE 802 based at least in part on node 804-1 paging UE 802 and triggering UE 802 to resume the connection with node 804-2.
  • node 804-2 may receive downlink data from data source 822 for UE 802.
  • node 804-2 may buffer downlink PDCP PDUs and provide a downlink data notification to node 804-1.
  • node 804-1 may trigger RAN paging in serving node 840, and may perform paging for UE 802.
  • node 804-2 may trigger RAN paging in serving node 840, and in node 804-1 to initiate paging for UE 802.
  • node 804-1 may utilize a stored UE context for UE 802 to enable UE 802 to resume an RRC connection with serving node 840.
  • node 804-1 may cause node 804-2 to release the UE context and forward downlink data to enable UE 802 to receive the downlink data from serving node 840.
  • node 804-1 may cause the downlink data to be forwarded to serving node 840 and serving node 840 to provide the downlink data to UE 802.
  • serving node 840, node 840-1, node 840-2, and data source 822 may perform a path switch procedure to enable subsequent downlink data to be provided for data source 822 to serving node 840, and from serving node 840 to UE 802.
  • Figs. 8A-8C are provided as examples. Other examples are possible and may differ from what was described with respect to Figs. 8A-8C.
  • Fig. 9 is a diagram illustrating an example process 900 performed, for example, by a base station (e.g., a first node of a set of nodes) , in accordance with various aspects of the present disclosure.
  • Example process 900 is an example where the first node (e.g., base station 110, node 704-1, node 804-1, and/or the like) performs dual-connectivity mode secondary cell group configuration.
  • process 900 may include transmitting a communication to reconfigure an SCG bearer associated with a second node and a user equipment in a dual-connectivity mode in connection with transferring the user equipment to a particular radio resource control communication state (block 910) .
  • the first node which may be a master node
  • the second node may be configured to store a user equipment context in connection with the user equipment operating in the particular radio resource control communication state.
  • the SCG bearer is reconfigured from the SCG bearer to an SCG split bearer.
  • the reconfiguration of the SCG bearer is a one-step radio resource control message transmission or a two-step radio resource control message exchange.
  • the user equipment is transferred to the particular radio resource control communication state based at least in part on an inactivity status report received from the second node.
  • the transmitting the communication to reconfigure is performed before the user equipment transfers to the particular radio resource control communication state.
  • the particular radio resource control communication state is one of an inactive state, a light connection state, or a semi-connected state.
  • the SCG bearer is reconfigured at the second node such that the second node provides downlink data to the first node for radio access network paging.
  • the user equipment is transferred to the particular radio resource control communication state without reconfiguring the SCG bearer to an SCG split bearer.
  • an indication that the user equipment is in the particular radio resource control communication state causes the second node to suspend at least one SCG split bearer or at least one SCG bearer.
  • process 900 may include receiving, from the second node, an indication of downlink data for the user equipment based at least in part on reconfiguring the SCG bearer (block 920) .
  • the first node may receive the indication of downlink data for the user equipment, and may initiate paging for the user equipment, based at least in part on reconfiguring the SCG bearer.
  • the indication of the downlink data is a subset of the downlink data.
  • the user equipment is paged by the first node based at least in part on the indication of the downlink data.
  • the user equipment context is used to transfer the user equipment from the particular radio resource control communication state to another radio resource control state.
  • At least a portion of the downlink data is provided from the first node to the user equipment. In some aspects, the downlink data is buffered by the first node. In some aspects, at least a portion of the downlink data is provided from the second node to the first node.
  • the first node reconfigures the SCG bearer to cause at least a portion of the downlink data to be provided from the second node to the user equipment directly via an air interface.
  • a downlink data indicator is received from the second node.
  • the SCG reconfiguration causes downlink data to be buffered by the second node.
  • another communication is transmitted to cause resumption of SCG data from the second node to the user equipment in connection with entering another radio resource control communication state.
  • process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 9. Additionally, or alternatively, two or more of the blocks of process 900 may be performed in parallel.
  • Fig. 10 is a diagram illustrating an example process 1000 performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • Example process 1000 is an example where the user equipment (e.g., UE 120, UE 702, UE 802, and/or the like) performs dual-connectivity mode secondary cell group configuration.
  • the user equipment e.g., UE 120, UE 702, UE 802, and/or the like
  • process 1000 may include transferring, based at least in part on an instruction from a first node, from a first radio resource control communication state to a second radio resource control communication state (block 1010) .
  • the user equipment may, when connected to a second node using a secondary cell group (SCG) bearer in a dual-connectivity mode, transfer from a radio resource control connected state to a radio resource control inactive state, wherein the user equipment stores a user equipment context and controls mobility for the user equipment.
  • SCG secondary cell group
  • process 1000 may include receiving, based at least in part on receiving paging from the first node triggered by downlink data being received at the second node, the downlink data from the first node or a third node (block 1020) .
  • the user equipment may receive paging to resume a connection using the user equipment context, may resume the connection, and may receive the downlink data from the first node, from a serving node, and/or the like based at least in part on resuming the connection.
  • the SCG bearer is reconfigured to an SCG split bearer associated with the user equipment, the first node, and the second node based at least in part on receiving the instruction from the first node.
  • the paging is received without the SCG bearer being reconfigured to an SCG split bearer.
  • process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.
  • the term component is intended to be broadly construed as hardware, firmware, or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, or a combination of hardware and software.
  • satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

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Abstract

Certains aspects de la présente invention se rapportent de manière générale aux communications sans fil. Selon certains aspects, un premier nœud peut transmettre une communication pour reconfigurer une porteuse de groupe de cellules secondaires (SCG) associée à un second nœud et à un équipement utilisateur dans un mode de connectivité double en connexion avec le transfert de l'équipement utilisateur vers un état de communication de commande de ressource radio particulier, le second nœud étant configuré pour maintenir un contexte d'équipement utilisateur en connexion avec l'équipement utilisateur fonctionnant dans l'état de communication de commande de ressource radio particulier. Selon certains aspects, le premier nœud peut recevoir, en provenance du second nœud, une indication de données de liaison descendante pour l'équipement utilisateur sur la base, au moins en partie, de la reconfiguration de la porteuse de SCG. L'invention concerne également de nombreux autres aspects.
PCT/CN2017/088404 2017-06-15 2017-06-15 Techniques et appareils pour une configuration de groupe de cellules secondaires en mode à double connectivité Ceased WO2018227461A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
PCT/CN2017/088404 WO2018227461A1 (fr) 2017-06-15 2017-06-15 Techniques et appareils pour une configuration de groupe de cellules secondaires en mode à double connectivité
CN202211189900.6A CN115515257B (zh) 2017-06-15 2018-06-13 用于多连接性模式中的用户设备移动性的技术和装置
EP18818755.3A EP3639611B1 (fr) 2017-06-15 2018-06-13 Techniques et appareils pour une mobilité d'équipement d'utilisateur dans un mode multi-connectivité
PCT/CN2018/091154 WO2018228451A1 (fr) 2017-06-15 2018-06-13 Techniques et appareils pour une mobilité d'équipement d'utilisateur dans un mode multi-connectivité
CN201880039417.5A CN110771254B (zh) 2017-06-15 2018-06-13 用于多连接性模式中的用户设备移动性的技术和装置
US16/615,105 US11606729B2 (en) 2017-06-15 2018-06-13 Techniques and apparatuses for user equipment mobility in multi-connectivity mode
US18/178,624 US12075289B2 (en) 2017-06-15 2023-03-06 Techniques and apparatuses for user equipment mobility in multi-connectivity mode

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020150199A1 (fr) * 2019-01-14 2020-07-23 Qualcomm Incorporated Coordination et transmission de radiomessagerie commune
CN113330800A (zh) * 2019-01-25 2021-08-31 高通股份有限公司 多无线电接入技术-双连通性和载波聚集中的副蜂窝小区群配置
CN114258723A (zh) * 2019-08-23 2022-03-29 联想(北京)有限公司 用于为uav添加辅助节点的方法和设备
CN114586384A (zh) * 2019-10-24 2022-06-03 高通股份有限公司 在空闲状态或非活动状态中保持多播/广播无线电承载
CN114651499A (zh) * 2019-11-08 2022-06-21 中兴通讯股份有限公司 参考信令设计和配置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014175665A2 (fr) * 2013-04-23 2014-10-30 Lg Electronics Inc. Procédé et appareil pour transmettre une indication d'inactivité dans un système de communication sans fil
WO2016071311A1 (fr) * 2014-11-07 2016-05-12 Nokia Solutions And Networks Oy Procédés et appareil pour une gestion de connectivité double

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014175665A2 (fr) * 2013-04-23 2014-10-30 Lg Electronics Inc. Procédé et appareil pour transmettre une indication d'inactivité dans un système de communication sans fil
WO2016071311A1 (fr) * 2014-11-07 2016-05-12 Nokia Solutions And Networks Oy Procédés et appareil pour une gestion de connectivité double

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"3GPP TSG-RAN WG2 Meeting #98, R2-1705742", RRCJNACTIVE PRINCIPLES, 19 May 2017 (2017-05-19), XP051265146 *
CATT: "3GPP TSG-RAN WG2 Meeting #96, R2-167956", INACTIVE STATE AND SUPPORT OF CA AND DC, 18 November 2016 (2016-11-18), XP051192902 *
ERICSSON: "3GPP TSG-RAN WG2 #98, R2-1704176", INACTIVE STATE IN LTE, 19 May 2017 (2017-05-19), XP051264061 *
HUAWEI ET AL.: "3GPP TSG-RAN WG2 #98, R2-1704894", DL DATA TRANSMISSION IN RRC_INACTIVE, 19 May 2017 (2017-05-19), XP051264634 *
HUAWEI ET AL.: "3GPP TSG-RAN WG2#98, R2-1704887", PAGING MECHANISM IN INACTIVE STATE AND IDLE STATE, 19 May 2017 (2017-05-19), XP051264627 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020150199A1 (fr) * 2019-01-14 2020-07-23 Qualcomm Incorporated Coordination et transmission de radiomessagerie commune
CN113330800A (zh) * 2019-01-25 2021-08-31 高通股份有限公司 多无线电接入技术-双连通性和载波聚集中的副蜂窝小区群配置
CN113330800B (zh) * 2019-01-25 2024-05-14 高通股份有限公司 多无线电接入技术-双连通性和载波聚集中的副蜂窝小区群配置
US12069763B2 (en) 2019-01-25 2024-08-20 Qualcomm Incorporated Secondary cell group configuration in multi-radio access technology-dual connectivity and carrier aggregation
CN114258723A (zh) * 2019-08-23 2022-03-29 联想(北京)有限公司 用于为uav添加辅助节点的方法和设备
CN114586384A (zh) * 2019-10-24 2022-06-03 高通股份有限公司 在空闲状态或非活动状态中保持多播/广播无线电承载
CN114586384B (zh) * 2019-10-24 2024-05-24 高通股份有限公司 在空闲状态或非活动状态中保持多播/广播无线电承载
CN114651499A (zh) * 2019-11-08 2022-06-21 中兴通讯股份有限公司 参考信令设计和配置

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