CN113079526B - User equipment reporting new radio measurement gap request information and method thereof - Google Patents
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Classifications
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- 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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- 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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
Abstract
A User Equipment (UE) is provided that includes a wireless transceiver and a controller. The wireless transceiver performs wireless transmission and reception to and from a first base station. The controller is coupled to the wireless transceiver and configured to: the method includes receiving an RRC reconfiguration message from the first base station via the wireless transceiver, and transmitting an RRC reconfiguration complete message including measurement gap requirement information to the first base station via the wireless transceiver in response to the UE being configured to provide the measurement gap requirement information for an NR target frequency band. The method and the device realize the beneficial effects of reporting flexibility and reducing the message length required by reporting the measurement gap during the RRC reconfiguration process.
Description
Cross reference
The present application claims priority from U.S. provisional application Ser. No. 62/57,371, filed on even date 20/11/2020, U.S. non-provisional patent application Ser. No. 16/953,927, filed on even date 6/2020, incorporated herein by reference in its entirety.
Technical Field
The present invention relates generally to mobile communication, and more particularly, to an apparatus for a User Equipment (UE) to report New Radio (NR) measurement gap request information and a method thereof.
Background
In a typical Mobile communication environment, a UE (also known as a Mobile Station (MS)) with wireless communication capabilities, such as a Mobile phone (also known as a cellular phone or cell phone) or a tablet personal computer (Personal Computer, PC), may send voice and/or data signals to one or more serving networks. Wireless communication between the UE and the serving network may be performed using various radio access technologies (Radio Access Technologies, RAT), such as global system for mobile communications (Global System for Mobile communication, GSM) technology, general packet radio service (General Packet Radio Service, GPRS) technology, enhanced data rates for global evolution (Enhanced Data rates for Global Evolution, EDGE) technology, wideband code Division multiple access (Wideband Code Division Multiple Access, WCDMA) technology, code Division multiple access 2000 (Code Division Multiple Access, cdma-2000) technology, time Division-synchronous code Division multiple access (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) technology, worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) technology, long term evolution (Long Term Evolution, LTE) technology, and LTE-Advanced (LTE-a) technology, etc.
These wireless technologies have been employed in various telecommunications standards to provide a universal protocol that enables different wireless devices to communicate at municipal, national, regional, and even global levels. One example of an emerging telecommunication standard is the 5G New Radio (NR). 5G NR is an enhanced set of LTE mobile standards promulgated by the third generation partnership project (the Third Generation Partnership Project,3 GPP). Its design aims to better support mobile broadband internet access by improving spectral efficiency, reducing costs, and improving services.
In LTE and 5G, a technique of "measurement gap" is proposed. The technical idea is to create a small gap during transmission and/or reception with no me serving cell, thereby allowing the UE to switch to the target cell and perform signal quality measurements. In order to do this seamlessly, a gap-defined protocol must be well established between the UE and the network. However, 3GPP has not defined the way in which the UE reports measurement gap requirement information in the 5G NR.
A solution is sought.
Disclosure of Invention
The present application proposes to allow a UE to report New Radio (NR) measurement gap requirement information during a Radio resource control reconfiguration procedure.
In a first aspect of the present application, a UE comprising a wireless transceiver and a controller is provided. The wireless transceiver is configured to perform wireless transmission and reception to and from a first base station. A controller is coupled to the wireless transceiver, and the controller is configured to: the method includes receiving an RRC reconfiguration message from the first base station via the wireless transceiver, and transmitting an RRC reconfiguration complete message including measurement gap requirement information to the first base station via the wireless transceiver in response to the UE being configured to provide the measurement gap requirement information for an NR target frequency band.
In a first implementation form of the first aspect of the present application, the controller is further configured to determine whether the RRC reconfiguration message includes an indicator for requesting the UE to report the measurement gap requirement information, and to determine that the UE is configured to provide the measurement gap requirement information in response to the RRC reconfiguration message including the indicator for requesting the UE to report the measurement gap requirement information.
In a second implementation form of the first aspect of the present application, the controller is further configured to determine whether a handover of the UE from one cell to another cell is occurring or whether the measurement gap requirement information is transformed compared to information reported last by the UE, and to determine that the UE is configured to provide the measurement gap requirement information in response to the handover of the UE from the one cell to the other cell being occurring or in response to the measurement gap requirement information being transformed compared to information reported last by the UE.
In a third implementation form of the first aspect of the present application, the controller is further configured to determine whether the UE has not reported any measurement gap requirement information to the first base station on the current RRC connection, and to determine that the UE is configured to provide the measurement gap requirement information in response to the UE having not reported any measurement gap requirement information to the first base station on the current RRC connection.
In a fourth implementation form of the first aspect of the present application, the RRC reconfiguration message includes at least one of a carrier aggregation (Carrier Aggregation, CA) parameter and a layer 1 parameter, and the measurement gap requirement information is determined based on the at least one of the carrier aggregation parameter and the layer 1 parameter.
In a fifth implementation form of the first aspect of the present application in combination with the fourth implementation form of the first aspect of the present application, the CA parameters comprise a configuration for Secondary Cell (SCell) addition or release, and the layer 1 parameters comprise a Multiple-input Multiple-Output (MIMO) configuration.
In a sixth implementation form of the first aspect of the present application, the measurement gap requirement information indicates whether the UE needs a measurement gap to perform (Synchronization Signal Block, SSB) synchronization signal block based measurements on each of the NR target frequency bands supported by the UE.
In a seventh implementation form of the first aspect of the present application in combination with the sixth implementation form of the first aspect of the present application, when the measurement gap is not required, the RRC reconfiguration complete message includes an interrupt interval indicating whether the UE needs to be smaller than the measurement gap to perform the synchronization signal block-based measurement on each of the NR target frequency bands supported by the UE.
In an eighth implementation form of the first aspect of the present application, when configuring a multi-radio access technology dual connection for the UE to communicate with both the first base station as a Secondary Node (SN) and a second base station as a primary Node (MN) simultaneously, the controller is further configured to send an RRC message including the measurement gap requirement information to the second base station via the wireless transceiver in response to sending the RRC reconfiguration complete message including the measurement gap requirement information to the first base station.
In a ninth implementation form of the first aspect of the present application in combination with the eighth implementation form of the first aspect of the present application, the RRC message is a UE assistance information message conforming to the third generation partnership project (Third Generation Partnership Project,3 GPP) technical specification (Technical Specification, TS) 38.331 for NR and the RRC reconfiguration message is received from the first base station via signaling radio bearer 3 (Signaling Radio Bearer, srb 3).
In a second aspect of the present application, a method is presented. The method comprises the following steps: receiving, by the UE, an RRC reconfiguration message from the first base station; and transmitting, by the UE, an RRC reconfiguration complete message including measurement gap requirement information to the first base station in response to the UE being configured to provide the measurement gap requirement information for the NR target frequency band.
In a first implementation form of the second aspect of the present application, the method further comprises the steps of: determining, by the UE, whether the RRC reconfiguration message includes an indicator for requesting the UE to report the measurement gap requirement information; and determining that the UE is configured to provide the measurement gap requirement information in response to the RRC reconfiguration message including the indicator requesting the UE to report the measurement gap requirement information.
In a second implementation form of the second aspect of the present application, the method further comprises the steps of: determining, by the UE, whether a handover of the UE from one cell to another cell is occurring or whether the measurement gap requirement information is transformed compared to information reported last time by the UE; and determining that the UE is configured to provide the measurement gap requirement information in response to the handover of the UE from the one cell to the other cell being occurring or in response to the measurement gap requirement information being transformed compared to information last reported by the UE.
In a third implementation form of the second aspect of the present application, the method further comprises the steps of: determining, by the UE, whether the UE has not reported any measurement gap requirement information to the first base station over the current RRC connection; and determining that the UE is configured to provide the measurement gap requirement information in response to the UE not reporting any measurement gap requirement information to the first base station on the current RRC connection.
In a fourth implementation form of the second aspect of the present application, the RRC reconfiguration message includes at least one of a carrier aggregation parameter and a layer 1 parameter, and the measurement gap requirement information is determined based on the at least one of the carrier aggregation parameter and the layer 1 parameter.
In a fifth implementation form of the second aspect of the present application in combination with the fourth implementation form of the second aspect of the present application, the CA parameters comprise a configuration for SCell addition or release, and the layer 1 parameters comprise a MIMO configuration.
In a sixth implementation form of the second aspect of the present application, the measurement gap requirement information indicates whether the UE needs a measurement gap to perform SSB-based measurements on each of the NR target frequency bands supported by the UE.
In a seventh implementation form of the second aspect of the present application in combination with the sixth implementation form of the second aspect of the present application, when the measurement gap is not required, the RRC reconfiguration complete message includes information indicating whether the UE requires an interruption interval smaller than the measurement gap to perform the SSB-based measurement for each of the NR target frequency bands supported by the UE.
In an eighth implementation form of the second aspect of the present application, the method further comprises the steps of: when configuring a multi-radio access technology dual connection for the UE for simultaneous communication with both the first base station as SN and a second base station as MN, an RRC message including the measurement gap requirement information is sent by the UE to the second base station in response to sending the RRC reconfiguration complete message including the measurement gap requirement information to the first base station.
In a ninth implementation form of the second aspect of the present application in combination with the eighth implementation form of the second aspect of the present application, the RRC message is a UE assistance information message compliant with 3gpp TS 38.331 for NR, and the RRC reconfiguration message is received from the first base station via signaling SRB.
Other aspects and features of the present application will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of an apparatus and method for a UE to report NR measurement gap requirement information.
The user equipment and the method for reporting the new radio measurement gap request information realize the beneficial effects of reporting flexibility and reducing the message length required by reporting the measurement gap during the RRC reconfiguration process.
Drawings
The application will be more fully understood from the following detailed description and examples, when read with reference to the accompanying drawings, in which:
fig. 1 is a block diagram of a wireless communication environment according to an embodiment of the present application;
fig. 2 is a block diagram illustrating a UE according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a method for a UE to report NR measurement gap requirement information according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating an exemplary measurement gap and break interval according to an embodiment of the present application;
fig. 5 is a message sequence chart illustrating reporting NR measurement gap requirement information according to an embodiment of the present application;
fig. 6 is a message sequence chart showing reporting NR measurement gap requirement information when configuring MR-DC according to an embodiment of the present application; and
fig. 7 is a message sequence chart illustrating reporting NR measurement gap requirement information when configuring MR-DC according to another embodiment of the present application.
Detailed Description
The following description is intended to be illustrative of the principles of the present application and should not be taken in a limiting sense. It should be understood that embodiments may be implemented in software, hardware, firmware, or any combination thereof. The terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Fig. 1 is a block diagram of a wireless communication environment according to an embodiment of the present application.
As shown in fig. 1, wireless communication environment 100 may include a UE 110 and a serving network 120, where UE 110 may be wirelessly connected to serving network 120 to obtain mobile services.
UE 110 may be a feature phone, a smart phone, a PC, a laptop, or any wireless communication device that supports RAT technology (e.g., 5G NR technology) used by serving network 120. In another embodiment, the UE may support more than one RAT. For example, the UE may support a 5G NR technology, a legacy 4G technology such as an LTE/LTE-a/TD-LTE technology or a WCDMA technology.
The service Network 120 may include an access Network 121 and a Core Network (CN) 122. The access network 121 is responsible for handling radio signals, terminating radio protocols, and connecting the UE 110 with the core network 122. The core network 122 is responsible for performing mobility management, network side authentication, and interfacing with public/external networks (e.g., the internet). Access network 121 and core network 122 may each include one or more network nodes for performing the described functions.
In one embodiment, the serving network 120 may be a 5G NR network and the access network 121 and the core network 122 may be a next generation radio access network (Next Generation Radio Access Network, NG-RAN) and a next generation core network (NG-CN, next Generation Core Network), respectively.
The NG-RAN may include one or more base stations, e.g., next generation nodebs (gnbs), which support high frequency bands (e.g., above 24 GHz), and each gNB may also include one or more transmission-reception points (Transmission Reception Point, TRPs), where each gNB or TRP may be referred to as a 5G base station. Some gNB functions may be distributed among different TRPs, while other gNB functions may be centralized, preserving flexibility and scope of specific deployments to meet the needs of specific situations.
The 5G base station may form one or more cells with different component carriers (Component Carrier, CC) for providing mobile services to UE 110. UE 110 may camp on one or more cells formed by one or more gnbs or TRPs, where the Cell on which UE 110 camps may be referred to as a serving Cell, where the serving Cell includes a Primary Cell (PCell) and one or more Secondary cells (scells).
NG-CNs are typically composed of various network functions including access and mobility functions (Access and Mobility Function, AMF), session management functions (Session Management Function, SMF), policy control functions (Policy Control Function, PCF), application functions (Application Function, AF), authentication server functions (Authentication Server Function, AUSF), user plane functions (User Plane Function, UPF) and user data management (User Data Management, UDM), each of which may be implemented as a network element on dedicated hardware, or as a software instance running on dedicated hardware, or as a virtual function instantiated on a suitable platform (e.g., cloud infrastructure).
The AMF provides UE-based authentication, authorization, mobility management, etc. The SMF is responsible for session management and assigns internet protocol (Internet Protocol, IP) addresses to the UE, and it also selects and controls UPFs for data transfer. If the UE has multiple sessions, different SMFs may be allocated to each session to manage the different SMFs separately and may provide different functions for each session. The AF provides information about the packet flow to the PCF responsible for policy control in order to support quality of service (Quality of Service, qoS). Based on this information, the PCF determines policies regarding mobility and session management so that the AMF and SMF operate properly. The AUSF stores the profile for UE authentication, while the UDM stores the subscription profile for the UE.
It should be understood that the wireless communication environment 100 depicted in the embodiment of fig. 1 is for illustrative purposes only and is not intended to limit the scope of the present application. For example, the RAT used by the serving network 120 may be 5G NR technology. That is, the serving network 120 may be a 6G, 7G, or 8G3GPP network. Alternatively, the communication environment 100 may further include a 4G network using LTE/LTE-A/TD-LTE technology. For example, the 4G network may include an Evolved universal terrestrial radio access network (E-UTRAN) and an Evolved packet core (Evolved Packet Core, EPC). The E-UTRAN may include one or more evolved NodeBs (eNBs) (e.g., macro-, femto-, or pico-eNBs), each of which may be referred to as a 4G base station. When configuring a Multi-RAT dual connection (Multi-RAT Dual Connectivity, MR-DC) for UE 110, the UE may communicate with both a 5G base station (e.g., a gNB) and a 4G base station (e.g., an eNB), wherein the 4G base station may be configured as a Master Node (MN) and the 5G base station may be configured as a Secondary Node (SN).
Fig. 2 is a block diagram of a UE shown in accordance with an embodiment of the present application.
As shown in fig. 2, the UE may include a wireless transceiver 10, a controller 20, a storage device 30, a display device 40, and an Input/Output (I/O) device 50.
The wireless transceiver 10 may be configured to perform wireless transmission and reception to and from the base stations of the serving network 120.
In particular, the wireless transceiver 10 may include a baseband processing device 11, a Radio Frequency (RF) device 12, and an antenna 13. Wherein the antenna 13 may comprise an antenna array for beam forming.
The baseband processing device 11 is configured to perform baseband signal processing and control communication between a user identification card (not shown) and the RF device 12. The baseband processing device 11 may include a plurality of hardware components to perform baseband signal processing, including Analog-to-Digital Conversion (ADC)/Digital-to-Analog Conversion (DAC), gain adjustment, modulation/demodulation, encoding/decoding, and the like.
The RF device 12 may receive an RF wireless signal via the antenna 13, convert the received RF wireless signal into a baseband signal, which is processed by the baseband processing device 11, or the RF device 12 receives a baseband signal from the baseband processing device 11 and converts the received baseband signal into an RF wireless signal and then transmits it via the antenna 13. The RF device 12 may also include a number of hardware devices to perform radio frequency conversion. For example, the RF device 12 may include a mixer for multiplying the baseband signal with a carrier oscillating in the radio frequency of the supported RAT, where the radio frequency may be any radio frequency used in 5G NR technology (e.g., millimeter wave 30 GHz-300 GHz) or may be 900MHz, 2100MHz, or 2.6GHz used in LTE/LTE-a/TD-LTE technology, or another radio frequency, depending on the RAT used.
The controller 20 may be a general purpose processor, a micro control unit (Micro Control Unit, MCU), an application processor, a digital signal processor (Digital Signal Processor, DSP), a graphics processing unit (Graphics Processing Unit, GPU), a holographic processing unit (Holographic Processing Unit, HPU), a neural processing unit (Neural Processing Unit, NPU), etc., the controller 20 including various circuits providing the following functions: data processing and computing, controlling wireless transceiver 10 to communicate wirelessly with service network 120, storing data (e.g., program code) to storage device 30 and retrieving data (e.g., program code) from storage device 30, sending a series of frame data (e.g., represented as text messages, graphics, images, etc.) to display device 40, and receiving user input or output signals from I/O device 50.
Specifically, the controller 20 may coordinate the above-described operations of the wireless transceiver 10, the storage device 30, the display device 40, and the I/O device 50 for the method by which the UE reports NR measurement gap requirement information.
In another embodiment, the controller 20 may be incorporated into the baseband processing apparatus 11 to function as a baseband processor.
As will be appreciated by those skilled in the art, the circuitry of the controller 20 will typically include transistors configured in a manner to control the operation of the circuitry in accordance with the functions and operations described herein. It will be further appreciated that the particular structure or interconnection of transistors will typically be determined by a compiler, such as a register transfer language (Register Transfer Language, RTL) compiler. The RTL compiler may be operated by the processor according to a script very similar to assembly language code to compile the script into a form used for the layout or manufacturing of the final circuit. In fact, RTL is known for its role and use in facilitating the design flow of electronic and digital systems.
The storage device 30 may be a Non-transitory machine-readable storage medium including memory (e.g., flash memory or Non-volatile random access memory (Non-Volatile Random Access Memory, NVRAM)), magnetic storage (e.g., a hard disk or magnetic tape), optical disk, or any combination thereof, for storing data, instructions, and/or program code for an application, a communication protocol, and/or a method by which the UE reports NR measurement gap requirement information.
The Display device 40 may be a Liquid-Crystal Display (LCD), a Light-Emitting Diode (LED) Display, an Organic LED (OLED), or an electronic paper Display (Electronic Paper Display EPD), etc., for providing a Display function. Alternatively, the display device 40 may further include one or more touch sensors disposed thereon or thereunder for sensing contact, connection or proximity of an object (e.g., a finger or stylus).
The I/O device 50 may include one or more buttons, a keyboard, a mouse, a touch pad, a camera, a microphone, and/or a speaker, etc., to serve as a Man-machine interface (Man-Machine Interface, MMI) for interacting with a user.
It should be understood that the components described in the embodiment of fig. 2 are for illustration purposes only and are not intended to limit the scope of the present application.
For example, the UE may include further components, such as a power source and/or a global positioning system (Global Positioning System, GPS) device, where the power source may be a mobile/replaceable battery that provides power to all other components of the UE, and the GPS device may provide location information of the UE for use by some location-based services or applications. Alternatively, the UE may include fewer components. For example, the UE may not include the display device 40 and/or the I/O device 50.
Fig. 3 is a flowchart illustrating a method for a UE to report NR measurement gap requirement information according to an embodiment of the present application.
In this embodiment, the method for the UE to report NR measurement gap requirement information may be applied to and performed by a UE (e.g., UE 110) wirelessly connected to one or more base stations (e.g., a gNB and/or eNB).
First, the UE receives a radio resource control (Radio Resource Control, RRC) reconfiguration message from the first base station (step S310).
In particular, the RRC reconfiguration message may include at least a carrier aggregation (Carrier Aggregation, CA) parameter and/or a Layer 1 (L1) parameter, and the UE may determine the measurement gap requirement information based on the CA parameter and/or the L1 parameter. The CA parameters may include a configuration for Scell addition or release, and the L1 parameters may include Multiple-input and Multiple-Output (MIMO) configurations (e.g., the number of antennas and layers for MIMO).
Then, the UE transmits an RRC reconfiguration complete message including measurement gap requirement information to the first base station in response to the UE being configured to provide the measurement gap requirement information of the NR target frequency band (step S320).
Specifically, the measurement gap requirement information indicates whether the UE needs a measurement gap to perform synchronization signal block (Synchronization Signal Block, SSB) based measurements on each of the NR target frequency bands supported by the UE.
In addition to the measurement gap requirement information, when the measurement gap is not required, the RRC reconfiguration complete message may further include an interruption interval (interruption interval) indicating whether the UE needs to be less than the measurement gap to perform SSB-based measurements on each of the NR target frequency bands supported by the UE. It should be appreciated that interruption due to RF switching for measurement may be a common problem. That is, although the UE has 2 RF chains for simultaneously communicating with the serving cell and the target cell, an interruption interval may be caused in communication with the serving cell when RF handover for measuring the target cell occurs.
Fig. 4 is a schematic diagram illustrating an exemplary measurement gap and interruption interval according to an embodiment of the present application.
Referring back to fig. 3, in one embodiment, the RRC reconfiguration message may include an indicator for requesting the UE to report the measurement gap requirement information, and if the RRC reconfiguration message includes an indicator for requesting the UE to report the measurement gap requirement information, it may be determined that the UE is configured to provide the measurement gap requirement information.
In another embodiment, the UE may measure whether the gap requirement information is transformed based on CA and/or L1 parameters included in the RRC reconfiguration message compared to information that determines whether a handover of the UE from one cell to another is occurring or compared to information reported last time by the UE. If a handover of the UE from one cell to another cell is occurring, or if the measurement gap requirement information is transformed compared to the information reported last time by the UE, it may be determined that the UE is configured to provide measurement gap requirement information.
In another embodiment, the UE may determine whether the UE has not reported any measurement gap requirement information to the first base station over the current RRC connection and may determine that the UE is configured to provide measurement gap requirement information if the UE has not reported any measurement gap requirement information to the first base station over the current RRC connection.
Fig. 5 is a message sequence chart illustrating reporting NR measurement gap requirement information according to an embodiment of the present application.
In step S510, the UE receives an RRC reconfiguration message from the gNB. Specifically, the RRC reconfiguration message includes CA and/or L1 parameters. In addition to the CA and/or L1 parameters, the RRC reconfiguration message may also include an indicator for requesting the UE to report measurement gap requirement information. For example, an indicator for requesting the UE to report measurement gap requirement information may be included in a "needleforgapconfig" information element (Information Element, IE) of the RRC reconfiguration message.
In step S520, the UE applies CA and/or L1 parameters and determines that the measurement gap requirement information is transformed compared to the information reported by the last UE.
In step S530, the UE transmits an RRC reconfiguration complete message including measurement gap requirement information to the gNB. Specifically, the measurement gap requirement information may be included in a "needledfapplnfo nr" IE of the RRC reconfiguration complete message.
In step S540, the UE receives an RRC reconfiguration message from the gNB. Specifically, the RRC reconfiguration message includes information for measuring gap addition or release.
In step S550, the UE configures a measurement gap according to information for increasing or releasing the measurement gap.
In step S560, the UE transmits an RRC reconfiguration complete message to the gNB.
In step S570, the gNB sends an RRC reconfiguration message to the UE in response to a decision to trigger a handover of the UE from the gNB to the target gNB. Specifically, the RRC reconfiguration message includes a handover configuration. For example, the handover configuration may be included in a "reconfigurationWithSync" IE of the RRC reconfiguration message, wherein the "reconfigurationWithSync" IE includes a random access configuration for handover.
In step S580, the UE determines that handover is occurring based on the handover configuration, and applies the handover configuration.
In step S590, the UE transmits an RRC reconfiguration complete message including measurement gap requirement information to the target gNB to complete the handover. Specifically, the measurement gap requirement information may be included in a "needledfapplnfo nr" IE of the RRC reconfiguration complete message.
Note that in fig. 5, steps S540 to S590 are optional. Specifically, if it is necessary to add or release the measurement gap, steps S540 to S560 are performed, and if a handover occurs, steps S570 to S590 are performed.
In view of the foregoing embodiments of fig. 3-5, it should be appreciated that the present application allows a UE to report NR measurement gap requirement information during an RRC reconfiguration procedure. Specifically, all NR bands supported by the UE are reported in the measurement gap requirement information. Advantageously, the reported information contains only enough information, which may reduce the size of the information to be reported and may provide a transformation of the measurement target. In contrast, in LTE release 14, the reported measurement gap requirement information includes only the gap requirement for each carrier of the service band (i.e., too little information may result in the measurement gap requirement changing every time the measurement target is changed). In conventional LTE, the reported measurement gap requirement information includes the gap requirement for each carrier of all supported bands (i.e., the reported information is oversized).
Fig. 6 is a message sequence chart showing reporting NR measurement gap requirement information when configuring MR-DC according to an embodiment of the present application.
In step S610, the UE receives an RRC reconfiguration message from the SN via signaling radio bearer 3 (Signaling Radio Bearer, srb 3). Specifically, the RRC reconfiguration message includes CA and/or L1 parameters that result in a change in measurement gap requirement information. For example, band Combination (BC) may be transformed due to the application of CA and/or L1 parameter secondary cell groups (Secondary Cell Group, SCG), and the transformation of SCG BC further results in a transformation of measurement gap requirement information.
In step S620, the UE updates measurement gap requirement information based on the CA and/or L1 parameters, and transmits an RRC reconfiguration complete message including the measurement gap requirement information to the SN. Specifically, the measurement gap requirement information may be included in a "needledfapplnfo nr" IE of the RRC reconfiguration complete message.
In step S630, the SN forwards the measurement gap requirement information of the UE to the MN through an inter-node message (inter-node message). In particular, inter-node messages may be redefined to convey measurement gap requirement information for the UE between the SN and the MN. For example, the inter-node message may be referred to as a UE information message (UE Information message).
Fig. 7 is a message sequence chart illustrating reporting NR measurement gap requirement information when configuring MR-DC according to another embodiment of the present application.
In step S710, the UE receives an RRC reconfiguration message from the SN via SRB 3. Specifically, the RRC reconfiguration message includes CA and/or L1 parameters that result in a change in measurement gap requirement information.
In step S720, the UE updates measurement gap requirement information based on the CA and/or L1 parameters, and transmits an RRC reconfiguration complete message including the measurement gap requirement information to the SN. Specifically, the measurement gap requirement information may be included in a "needledfapplnfo nr" IE of the RRC reconfiguration complete message.
The UE also transmits an RRC message including measurement gap requirement information to the MN in step S730. For example, the RRC message may be a UE assistance information message conforming to the 3GPP technical specification (Technical Specification, TS) 38.331 for NR.
Note that the 3GPP specifications mentioned herein are for teaching the spirit of the present application, and the present application is not limited thereto.
In view of the foregoing embodiments of fig. 6 to 7, it can be appreciated that the present invention achieves synchronization of measurement gap requirement information of a UE between an SN and an MN by allowing the SN or the UE to provide the same measurement gap requirement information to the MN if the measurement gap requirement information is reported in response to an RRC reconfiguration message transmitted by the SN in the context of configuring an MR-DC.
While the present application has been described by way of example and in terms of preferred embodiments, it is to be understood that the present application is not so limited. Various changes and modifications may be made by one skilled in the art without departing from the scope and spirit of the application. Accordingly, the scope of the application is to be defined and protected by the following claims and their equivalents.
Use of ordinal terms such as "first," "second," etc., in the claims to connote a claim element does not by itself connote any priority, precedence, or order of one claim element over another or the temporal order in which a method is performed, however, such ordinal terms such as "first," "second," etc., are used merely as labels to distinguish one claim element having a same name from another element having a same name (but for use of the ordinal term) to distinguish the claim elements.
Claims (16)
1. A user equipment reporting new radio measurement gap request information, comprising:
a wireless transceiver configured to perform wireless transmission and reception to and from a first base station; and
a controller coupled to the wireless transceiver, and the controller is configured to: receiving a radio resource control reconfiguration message from the first base station via the wireless transceiver, and sending a radio resource control reconfiguration complete message including measurement gap requirement information to the first base station via the wireless transceiver, in response to the user equipment being configured to provide the measurement gap requirement information for a new radio target frequency band,
wherein the measurement gap requirement information indicates whether the user equipment needs a measurement gap to perform synchronization signal block based measurements for each of the new radio target bands supported by the user equipment,
when the measurement gap is not required, the radio resource control reconfiguration complete message includes an interruption interval indicating whether the user equipment needs to be less than the measurement gap to perform the synchronization signal block-based measurement on each of the new radio target frequency bands supported by the user equipment.
2. The user equipment reporting new radio measurement gap request information of claim 1, wherein the controller is further configured to determine whether the radio resource control reconfiguration message includes an indicator requesting the user equipment to report the measurement gap requirement information, and to determine that the user equipment is configured to provide the measurement gap requirement information in response to the radio resource control reconfiguration message including the indicator requesting the user equipment to report the measurement gap requirement information.
3. The user equipment reporting new radio measurement gap request information of claim 1, wherein the controller is further configured to determine whether a handover of the user equipment from one cell to another cell is occurring or whether the measurement gap requirement information is transformed compared to information reported last by the user equipment, and to determine that the user equipment is configured to provide the measurement gap requirement information in response to the handover of the user equipment from the one cell to the other cell being occurring or in response to the measurement gap requirement information being transformed compared to information reported last by the user equipment.
4. The user device reporting new radio measurement gap request information of claim 1, wherein the controller is further configured to determine whether the user device has not reported any measurement gap requirement information to the first base station over a current radio resource control connection, and to determine that the user device is configured to provide the measurement gap requirement information in response to the user device having not reported any measurement gap requirement information to the first base station over the current radio resource control connection.
5. The user equipment reporting new radio measurement gap request information of claim 1, wherein the radio resource control reconfiguration message includes at least one of a carrier aggregation parameter and a layer 1 parameter, and wherein the measurement gap requirement information is determined based on the at least one of the carrier aggregation parameter and the layer 1 parameter.
6. The user equipment reporting new radio measurement gap request information as claimed in claim 5, wherein the carrier aggregation parameter comprises a configuration for secondary cell addition or release, and the layer 1 parameter comprises a multiple input multiple output configuration.
7. The user equipment reporting new radio measurement gap request information of claim 1, wherein when configuring a multi-radio access technology dual connection for the user equipment to simultaneously communicate with both the first base station as a secondary node and a second base station as a primary node, the controller is further configured to send a radio resource control message including the measurement gap requirement information to the second base station via the wireless transceiver in response to sending the radio resource control reconfiguration complete message including the measurement gap requirement information to the first base station.
8. The user equipment reporting new radio measurement gap request information of claim 7, wherein the radio resource control message is a user equipment assistance information message conforming to a third generation partnership project technical specification for a new radio, and the radio resource control reconfiguration message is received from the first base station via a signaling radio bearer 3.
9. A method of reporting new radio measurement gap request information, comprising:
receiving, by the user equipment, a radio resource control reconfiguration message from the first base station; and
a radio resource control reconfiguration complete message including measurement gap requirement information is sent by the user equipment to the first base station, in response to the user equipment being configured to provide the measurement gap requirement information for a new radio target frequency band,
wherein the measurement gap requirement information indicates whether the user equipment needs a measurement gap to perform synchronization signal block based measurements for each of the new radio target bands supported by the user equipment,
when the measurement gap is not required, the radio resource control reconfiguration complete message includes an interruption interval indicating whether the user equipment needs to be less than the measurement gap to perform the synchronization signal block-based measurement on each of the new radio target frequency bands supported by the user equipment.
10. The method of reporting new radio measurement gap request information as claimed in claim 9, further comprising:
determining, by the user equipment, whether the radio resource control reconfiguration message includes an indicator for requesting the user equipment to report the measurement gap requirement information; and
determining that the user equipment is configured to provide the measurement gap requirement information in response to the radio resource control reconfiguration message includes the indicator requesting the user equipment to report the measurement gap requirement information.
11. The method of reporting new radio measurement gap request information as claimed in claim 9, further comprising:
determining, by the user equipment, whether a handover of the user equipment from one cell to another cell is occurring or whether the measurement gap requirement information is transformed compared to information reported last time by the user equipment; and
it is determined that the user equipment is configured to provide the measurement gap requirement information in response to the handover of the user equipment from the one cell to the other cell being occurring or in response to the measurement gap requirement information being transformed in comparison to information last reported by the user equipment.
12. The method of reporting new radio measurement gap request information as claimed in claim 9, further comprising:
determining, by the user equipment, whether the user equipment has not reported any measurement gap requirement information to the first base station over the current radio resource control connection; and
it is determined that the user equipment is configured to provide the measurement gap requirement information in response to the user equipment not reporting any measurement gap requirement information to the first base station over the current radio resource control connection.
13. The method of reporting new radio measurement gap request information as claimed in claim 9, wherein the radio resource control reconfiguration message includes at least one of a carrier aggregation parameter and a layer 1 parameter, and the measurement gap requirement information is determined based on the at least one of the carrier aggregation parameter and the layer 1 parameter.
14. The method of reporting new radio measurement gap request information as claimed in claim 13, wherein the carrier aggregation parameter comprises a configuration for secondary cell addition or release, and the layer 1 parameter comprises a multiple input multiple output configuration.
15. The method of reporting new radio measurement gap request information as claimed in claim 9, further comprising:
when a multi-radio access technology dual connection is configured for the user equipment to communicate with both the first base station as a secondary node and a second base station as a primary node, a radio resource control message including the measurement gap requirement information is sent by the user equipment to the second base station in response to sending the radio resource control reconfiguration complete message including the measurement gap requirement information to the first base station.
16. The method of reporting new radio measurement gap request information as claimed in claim 15, wherein the radio resource control message is a user equipment assistance information message conforming to a third generation partnership project technical specification for a new radio, and the radio resource control reconfiguration message is received from the first base station via a signalling radio bearer 3.
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| US202062957371P | 2020-01-06 | 2020-01-06 | |
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| US16/953,927 | 2020-11-20 | ||
| US16/953,927 US11470523B2 (en) | 2020-01-06 | 2020-11-20 | Apparatuses and methods for user equipment (UE) to report new radio (NR) measurement gap requirement information |
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| CN113079526A CN113079526A (en) | 2021-07-06 |
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| TWI758050B (en) | 2022-03-11 |
| CN113079526A (en) | 2021-07-06 |
| TW202127955A (en) | 2021-07-16 |
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