Method and device for wireless communication at user equipment (UE) and base station

Abstract

Methods and apparatus for wireless communication at a user equipment (UE) and a base station are provided. A method of wireless communication at a user equipment (UE) includes: receiving, by the UE, a fixed UE Radio Resource Management (RRM) measurement relaxation standard, where the fixed UE RRM measurement relaxation standard is different from a mobile UE RRM measurement relaxation standard; and performing, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criteria.

Description

[0001] This application is a divisional application of the invention patent application with application date of May 4, 2021, application number 202180032134.X, and invention name “RRM measurement relaxation for fixed user equipment”.

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims the benefit of U.S. Provisional Application Serial No. 63 / 022,429, entitled “RRM Relaxation for Stationary User Equipment,” filed on May 8, 2020, and U.S. Patent Application No. 17 / 237,916, entitled “RRM RELAXATION FORSTATIONARY USER EQUIPMENT,” filed on April 22, 2021, the entire contents of which are expressly incorporated herein by reference. Technical Field

[0004] The present disclosure relates generally to communication systems and, more particularly, to wireless communications including radio resource management (RRM) measurements. Background Art

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at city, country, region and even global levels. An exemplary telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC) and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0007] A simplified summary of one or more aspects is presented below in order to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all contemplated aspects, and is neither intended to identify important or critical elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that is presented later.

[0008] Radio Resource Management (RRM) is used to manage various aspects of wireless communications, such as transmit power, user equipment allocation, beamforming, data rate, modulation scheme, etc. RRM helps ensure that available resources are used efficiently. To perform RRM on a system level, a user equipment (UE) can perform and report various RRM measurements.

[0009] In addition to mobile user equipment (UE) that change physical locations, wireless communications may also involve fixed UEs. Since fixed UEs do not move in the physical world, the connection of a fixed UE to a serving cell may not fluctuate as it does for a mobile UE. Various aspects presented herein enable a fixed UE to perform different RRM measurements, which may, for example, involve a different configuration or different requirements than a mobile UE. Various aspects presented herein, including reducing the possibility of measurements and reports, may improve the efficient allocation of resources for fixed UEs.

[0010] In order to utilize resources more efficiently, the UE may determine that the UE meets the RRM measurement relaxation criteria for fixed UEs. The UE may skip one or more RRM measurements in response to determining that the UE meets the RRM measurement relaxation criteria for fixed UEs. The UE may signal the base station that the UE is a fixed UE before skipping the RRM measurement. A fixed UE may skip RRM measurements regardless of its location in the cell as long as the signal strength meets the performance threshold.

[0011] In one aspect of the present disclosure, a method for performing wireless communication at a user equipment (UE) is provided, comprising: receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and performing, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criterion.

[0012] In one aspect of the present disclosure, a method for performing wireless communications at a base station is provided, comprising: receiving an indication from a user equipment UE that the UE is fixed, wherein the indication includes UE capabilities received by the base station during connection establishment with the UE; and transmitting a configuration including a fixed UE radio resource management (RRM) measurement relaxation standard in response to the indication, wherein the fixed UE RRM measurement relaxation standard is different from a mobile UE RRM measurement relaxation standard.

[0013] In one aspect of the present disclosure, an apparatus for performing wireless communication at a user equipment (UE) is provided, comprising: a memory; and at least one processor, the at least one processor being coupled to the memory and configured to: receive, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and perform, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criterion.

[0014] In one aspect of the present disclosure, an apparatus for performing wireless communication at a base station is provided, comprising: a memory; and at least one processor, the at least one processor being coupled to the memory and configured to: receive an indication from a user equipment UE that the UE is fixed, wherein the indication includes UE capabilities received by the base station during establishment of a connection with the UE; and transmit a configuration including a fixed UE radio resource management (RRM) measurement relaxation standard in response to the indication, wherein the fixed UE RRM measurement relaxation standard is different from a mobile UE RRM measurement relaxation standard.

[0015] In one aspect of the present disclosure, an apparatus for wireless communication at a user equipment (UE) is provided, comprising: a component for receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and a component for performing, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criterion.

[0016] In one aspect of the present disclosure, an apparatus for wireless communication at a base station is provided, comprising: a component for receiving an indication from a user equipment UE that the UE is fixed, wherein the indication comprises UE capabilities received by the base station during connection establishment with the UE; and a component for transmitting, in response to the indication, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

[0017] In one aspect of the present disclosure, a non-transitory computer-readable medium having instructions stored thereon is provided, wherein the instructions, when executed by a processor, perform operations for wireless communication by a user equipment UE, the operations including: receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and performing, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criterion.

[0018] In one aspect of the present disclosure, a non-transitory computer-readable medium having instructions stored thereon is provided, wherein the instructions, when executed by a processor, perform operations for wireless communication by a base station, the operations comprising: receiving an indication from a user equipment UE that the UE is fixed, wherein the indication comprises UE capabilities received by the base station during establishment of a connection with the UE; and transmitting a configuration comprising a fixed UE radio resource management (RRM) measurement relaxation criterion in response to the indication, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

[0019] In one aspect of the present disclosure, a method, a computer-readable medium, and a device are provided. The device is configured to receive a resource management (RRM) measurement relaxation criterion for a fixed UE from a base station. The UE is further configured to skip one or more RRM measurements based on the RRM measurement relaxation criterion of the fixed UE.

[0020] In another aspect of the present disclosure, a method, a computer-readable medium, and a device are provided. The device is configured to receive an indication from a UE indicating that the UE is fixed. The device is further configured to transmit a configuration including an RRM measurement relaxation criterion for the fixed UE in response to the indication.

[0021] To achieve the foregoing and related ends, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of only some of the various ways in which the principles of the various aspects may be employed, and this specification is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0023] Figure 2A , Figure 2B , Figure 2C and Figure 2D2 are diagrams showing examples of a first 5G / NR frame, a DL channel within a 5G / NR subframe, a second 5G / NR frame, and a UL channel within a 5G / NR subframe, respectively.

[0024] Figure 3 is a diagram showing an example of a base station and a user equipment (UE) in an access network.

[0025] Figure 4 is an exemplary communication flow between a UE and a base station according to various aspects presented herein.

[0026] Figure 5 is a flow chart of a method of wireless communication in accordance with various aspects presented herein.

[0027] Figure 6 is a flow chart of a method of wireless communication in accordance with various aspects presented herein.

[0028] Figure 7 is a diagram showing an example of a hardware implementation for an exemplary device.

[0029] Figure 8 is a diagram showing an example of a hardware implementation for an exemplary device. DETAILED DESCRIPTION

[0030] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. In order to provide a comprehensive understanding of the various concepts, the detailed description includes specific details. However, it will be apparent to one of ordinary skill in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

[0031] Several aspects of telecommunication systems will now be presented with reference to various devices and methods. These devices and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the overall system.

[0032] As an example, an element or any part of an element or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functions described throughout this disclosure. One or more processors in a processing system may execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, and / or functions, etc.

[0033] Therefore, in one or more exemplary embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available media that a computer can access. By way of example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage, a combination of the above types of computer-readable media, or any other medium that can be used to store computer executable code in the form of computer-accessible instructions or data structures.

[0034] Although various aspects and implementations are described in this application by illustrating some examples, those skilled in the art will understand that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementation and / or use can occur via integrated chip implementations and other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, devices supporting artificial intelligence (AI), etc.). Although some examples may or may not be specifically for use cases or applications, various applicability of the described innovations may occur. The range of implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems that incorporate one or more aspects of the described innovations. In some practical settings, the devices incorporating the described aspects and features may also include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily include many components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). It is intended that the innovations described herein can be practiced in devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of various sizes, shapes, and configurations.

[0035] Figure 1 1 is a diagram showing an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0036] A base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with the core network 190 via a second backhaul link 184. The base station 102 may perform, among other functions, one or more of the following functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, non-access stratum (NAS) message distribution, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 may communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) via third backhaul link 134 (eg, X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 may be wired or wireless.

[0037] The base station 102 can communicate wirelessly with the UE 104. Each of the base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link 120 between the base station 102 and the UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be performed over one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) bandwidth for each carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL ​​and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0038] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be performed via a variety of wireless D2D communication systems such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0039] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154, for example, in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed frequency spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether a channel is available.

[0040] The small cell 102' may operate in a licensed and / or unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed frequency spectrum may improve the coverage of the access network and / or increase the capacity of the access network.

[0041] The electromagnetic spectrum is often subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 Mhz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various literature and articles, even though a portion of FR1 is greater than 6 GHz. A similar naming issue sometimes arises with respect to FR2, which is often (interchangeably) referred to as "millimeter wave" in literature and articles, even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) which is identified as a "millimeter wave" band by the International Telecommunication Union (ITU).

[0042] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR research has identified operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz-24.25 GHz). Frequency bands that fall within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend the characteristics of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G Nr operations above 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF band.

[0043] In view of the above, unless otherwise specifically stated, it should be understood that the term "sub-6 GHz" and the like (if used herein) can broadly refer to frequencies that may be lower than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that the term "millimeter wave" and the like (if used herein) can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or may be within the EHF band.

[0044] The base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), may include and / or be referred to as an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in traditional sub-6 GHz spectrum, millimeter wave frequencies, and / or near millimeter wave frequencies to communicate with UE 104. When gNB 180 operates at millimeter wave or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming.

[0045] The base station 180 may transmit a beamformed signal in one or more transmit directions 182' to the UE 104. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182". The UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions. The base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of the base station 180 / UE 104. The transmit direction and receive direction of the base station 180 may be the same or may be different. The transmit direction and receive direction of the UE 104 may be the same or may be different.

[0046] The EPC 160 may include a mobile management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. Typically, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provision and delivery. The BM-SC 170 may be used as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and collecting charging information related to eMBMS.

[0047] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP service 197. The IP service 197 may include the Internet, the intranet, the IP multimedia subsystem (IMS), the packet switch (PS) stream transmission (PSS) service, and / or other IP services.

[0048] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), or some other suitable term. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0049] Reference again Figure 1 In some aspects, the UE 104 may include an RRM measurement relaxation component 140. The RRM measurement relaxation component 140 may be configured to receive an RRM measurement relaxation criterion for a fixed UE from a base station. The RRM measurement relaxation component 140 may be configured to skip one or more RRM measurements based on the RRM measurement relaxation criterion for the fixed UE. The RRM measurement relaxation component 140 may be configured to indicate to the base station that the UE is fixed.

[0050] In some aspects, one or more base stations 102 / 180 may include an RRM measurement relaxation processing component 198 configured to receive an indication from a UE indicating that the UE is stationary. The RRM measurement relaxation processing component 198 may be further configured to transmit a configuration including an RRM measurement relaxation criterion for a stationary UE in response to the indication.

[0051] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM and other wireless technologies.

[0052] Figure 2A FIG200 is a diagram showing an example of a first subframe within a 5G / NR frame structure. Figure 2B230 is a diagram showing an example of DL channels within a 5G / NR subframe. Figure 2C FIG250 is a diagram showing an example of a second subframe within a 5G / NR frame structure. Figure 2D is a diagram 280 showing an example of UL channels within a 5G / NR subframe. The 5G / NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to both DL and UL. Figure 2A , Figure 2C In the example provided, it is assumed that the 5G / NR frame structure is TDD, where subframe 4 is configured with slot format 28 (primarily DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 34 (primarily UL). Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are all DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format (dynamically through DL control information (DCI), or semi-statically / statically through radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the description below also applies to the 5G / NR frame structure for TDD.

[0053] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single-stream transmission). The number of slots within a subframe is based on the slot configuration and parameter set. For slot configuration 0, different parameter sets µ 0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter sets 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Therefore, for slot configuration 0 and parameter set µ, there are 14 symbols / slot and 2 µ timeslots / subframes. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to ,in are parameter sets 0 to 4. Thus, parameter set µ=0 has a subcarrier spacing of 15 kHz and parameter set µ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. FIG. 2A to FIG. 2D An example is provided for slot configuration 0, where there are 14 symbols per slot, and parameter set µ=2, where there are 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see Figure 2B ), which are frequency division multiplexed. Each BWP can be associated with a specific parameter set.

[0054] A resource grid can be used to represent the frame structure. Each slot consists of a resource block (RB) (also called a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0055] like Figure 2A As shown, some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) (indicated as R for a specific configuration).x , where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0056] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE includes nine RE groups (REGs), and each REG includes four consecutive REs in one OFDM symbol. The PDCCH within one BWP can be called a control resource set (CORESET). Additional BWPs can be located at higher and / or lower frequencies on the channel bandwidth. The primary synchronization signal (PSS) can be within symbol 2 of a specific subframe of the frame. The UE 104 uses the PSS to determine the subframe / symbol timing and the physical layer identity. The secondary synchronization signal (SSS) can be within symbol 4 of a specific subframe of the frame. The UE uses the SSS to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the above-mentioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also called an SS block (SSB)). The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as the system information block (SIB)), and paging messages.

[0057] like Figure 2C As shown, some REs carry DM-RS (indicated as R for one specific configuration, but other DM-RS configurations are also possible) for channel estimation at the base station. The UE can transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS can be transmitted in different configurations, depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. The UE can transmit a sounding reference signal (SRS). The SRS can be transmitted in the last symbol of the subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the comb structures. The SRS can be used by the base station for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0058] Figure 2D Examples of various UL channels within a subframe of a frame are shown. The PUCCH may be positioned as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0059] Figure 3 3 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functions. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), measurement configuration of inter-radio access technology (RAT) mobility, and UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel priorities.

[0060] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be divided into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then these streams may be combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0061] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation point transmitted by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements Layer 3 and Layer 2 functions.

[0062] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0063] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel priority.

[0064] The TX processor 368 may select an appropriate coding and modulation scheme and facilitate spatial processing using channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0065] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0066] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0067] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 140 related aspects.

[0068] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 198 related aspects.

[0069] Figure 4 400 is an exemplary communication flow between a UE 404 and a base station 402 according to various aspects presented herein. As described herein, at 401, the UE 404 may transmit an indication of an RRM measurement configuration / capability to the base station 402. In some aspects, the indication of the RRM measurement configuration / capability may indicate that the UE is fixed. In some aspects, the UE 404 may transmit an indication to the base station 402 via UE capability signaling during connection establishment. In one aspect, the UE 404 may transmit a single bit indication indicating that the UE is fixed. In some aspects, the UE may indicate that it does not support a set of mobility-related features, rather than providing an explicit indication that the UE is fixed. In some aspects, the UE may indicate that it does not support one or more of CSI-RS, UL timing maintenance, or periodic CSI reporting for mobility. The base station 402 may determine that the UE 404 is fixed based on any indication of lack of support for mobile features. Exemplary RRM measurements may include intra-frequency measurements, inter-frequency measurements of the same or lower priority, or inter-RAT (radio access technology) frequency measurements of lower priority.

[0070] In some aspects, an indication of the RRM measurement configuration / capability may be transmitted to the base station 402 using UE assistance information (UAI) indicating a preferred configuration for RRM measurements. In some aspects, the UAI may include an indication that the UE is a fixed UE. In some aspects, the UAI may indicate a set of preferred configurations. In some aspects, the set of preferred configurations may not be pre-configured by the base station 402.

[0071] In response to receiving an indication of an RRM measurement configuration or capability, at 401, a base station 402 may transmit an RRM relaxation criterion indicating a relaxation criterion 403 for one or more RRM measurements to a UE 404. The RRM relaxation criterion 403 may include various parameters, such as a current cell selection RX level value (Srxlev), a search threshold S SearchThresholdP , the reference Srxlev value (dB) of the serving cell SrxlevRef, the time period before the UE can relax RRM measurements T SearchDeltaP or other relevant parameters.

[0072] In some aspects, the base station 402 may indicate, for example, at 403, that as long as the current cell selection RX level value (Srxlev) satisfies the threshold S SearchThresholdP , the UE can skip its RRM measurements for a certain period of time, regardless of its location in the cell. In some aspects, if (SrxlevRef - Srxlev) < S SearchDeltaP , then determine that Srxlev satisfies S SearchThresholdP .

[0073] At 405, after receiving the RRM relaxation criteria, the UE 404 may determine to skip one or more RRM measurements. The UE 404 may skip the one or more RRM measurements at any time after receiving the RRM relaxation criteria 403, for example, as shown at 405. For example, when the UE skips the RRM measurements at 405, the UE 404 is in an active radio resource control (RRC) state. In another example, when the UE skips the RRM measurements at 405, the UE may be in an RRC idle or RRC inactive state. At 405, the UE may repeatedly skip the RRM measurements. The UE may make repeated determinations to skip one or more RRM measurements.

[0074] In some aspects, the UE 404 may determine whether to skip RRM measurements independently of its location in the cell. In one aspect, in which the UE is in an RRC idle or RRC inactive state, if Srxlev is greater than S SearchThresholdP , the UE may determine to skip one or more defined RRM measurements within the first time period T1. In some aspects, the UE may skip each of the RRM measurements within the first time period T1. In some aspects, if Srxlev is not greater than S SearchThresholdP , the UE 404 may determine to skip one or more defined RRM measurements within a second time period T2 (less than T1). In some aspects, the UE may skip each of the RRM measurements within the second time period T2. In some aspects, after T1 or T2 has passed, the UE may perform another iteration of the determination of whether to skip or perform RRM measurements, for example at 405.

[0075] In some aspects, if the UE is in an RRC idle or inactive state, the UE 404 may still perform measurements on neighboring cells as indicated by the RRM relaxation criteria. The UE may perform measurements on only a subset of neighboring cells as indicated by the RRM relaxation criteria at 407. For example, the base station 402 may indicate a subset of one or more neighboring cells and their associated synchronization signal blocks (SSBs) in the RRM relaxation criteria 403. The UE 404 may perform RRM measurements on a subset of neighboring cells that are spatially associated with the best K SSBs of its current serving cell. The UE 404 may transmit the measurements at step 409.

[0076] Because UE 404 is fixed, even if UE 404 is located at the cell edge and farther from the base station, changes in channel conditions or signal blocking can be handled by intra-cell beam switching. In some aspects, the UE can skip RRM measurements before T SearchDeltaP Intra-frequency or inter-frequency measurements are performed according to a set of measurement rules within a certain period of time.

[0077] In some aspects, when the UE determines to skip RRM measurements at 405, the UE 404 may be in an RRC active state. In such aspects, if the UE is not located at the edge of the cell, the UE 404 may relax or stop the RRM measurements, for example, based on an indication in the RRM measurement relaxation criteria. For example, in some aspects, the relaxation or reduction of the RRM measurement / report may be further based on the location of the UE within the cell. In some aspects, the RRM measurement relaxation criteria may include a reference signal received power (RSRP) threshold for relaxation. The UE may use the RSRP threshold to determine whether to reduce / skip the RRM measurements. In some aspects, the RRM measurement relaxation criteria may include a reference signal received quality (RSRQ) threshold for relaxation. In some aspects, if the UE 404 has met the threshold within the time period T1 or T3, the UE 404 may determine to skip one or more RRM measurements. For example, if for at least T3, Srxlev> RSRP threshold, the UE 404 may relax or stop the RRM measurements on the current serving cell, depending on the configuration of the base station or the configuration of the UE.

[0078] In some aspects, the UE may re-determine whether to perform RRM measurements after stopping measurements for a time period T4. In some aspects, the UE may re-determine whether to perform RRM measurements after determining the occurrence of triggering event A3 (the measurement of the neighboring cell becomes better than the serving cell by at least an offset) or event A5 (the measurement of the serving cell becomes worse than a first threshold and the measurement of the neighbor becomes better than a second defined threshold).

[0079] Figure 55 is a flow chart of a method 500 of wireless communication. The method may be performed by a UE or a component of a UE, such as a modem, a transceiver, etc. (e.g., UE 104, 350, 404; a processing system, which may include a memory 360 and which may be the entire UE 350 or a component of a UE 350, such as a TX processor 368, an RX processor 356 and / or a controller / processor 359, a device 702). The method may enable the UE 404 to relax its RRM measurements. In some examples, the method may include combining Figure 4 Various aspects described in UE 404.

[0080] At 510, the UE transmits an RRM measurement configuration / capability indication to the base station. The RRM measurement configuration / capability indication may include in conjunction with, for example Figure 4 In some aspects, the RRM measurement configuration / capability indication may indicate that the UE is fixed. In some aspects, the indication may be a single bit indication indicating that the UE is fixed. In some aspects, the indication may be an indication indicating a lack of a set of mobility-related features, non-support of CSI-RS for mobility, UL timing maintenance or periodic CSI reporting, etc. Exemplary RRM measurements may include intra-frequency measurements, inter-frequency measurements of the same or lower priority, or inter-RAT frequency measurements of lower priority. In some aspects, 510 may occur during connection establishment between the UE and the base station. In some aspects, 510 may be performed by Figure 7 The capability indication component 742 in is executed.

[0081] In some aspects, an indication of the RRM measurement configuration / capability may be transmitted to a base station using a UAI indicating a preferred configuration for RRM measurements. In some aspects, the UAI may include an indication that the UE is a fixed UE. In some aspects, the UAI may indicate a set of preferred configurations. In some aspects, the set of preferred configurations may not be pre-configured by the base station.

[0082] At 520, the UE receives a set of RRM measurement relaxation criteria and configurations from the base station. In some aspects, the RRM measurement relaxation criteria and configurations include one or more of: a first indication to relax RRM measurements for fixed UEs, a second indication to stop RRM measurements for fixed UEs, a reference signal received power (RSRP) threshold for relaxing fixed UEs, a measurement scaling factor for fixed UEs, a relaxation search period for fixed UEs, or a duration for relaxing or stopping one or more RRM measurements for fixed UEs. In some aspects, the RRM measurement relaxation criteria for fixed UEs received in the configuration are different from default measurement relaxation criteria. The RRM measurement relaxation criteria and configurations may include a combination of, for example, Figure 4 In some aspects, 520 may be comprised of Figure 7 The relaxed standard component 744 is executed in.

[0083] At 530, the UE determines whether the UE satisfies the RRM measurement relaxation criteria for fixed UEs. The determination may include combining, for example, Figure 4 In some aspects, 530 may be comprised of Figure 7 The determining component 746 in the embodiment is executed. Depending on the specific situation of the UE, the UE can take various actions at 540. The various actions at 540 can be performed by Figure 7 The relaxation component 748 in is executed.

[0084] If the UE has an active RRC connection, for example, in an RRC connected state, and the UE is at a cell edge (e.g., within a defined distance from the cell edge), the UE may determine that the UE cannot skip any RRM measurements. If the UE has an active RRC connection, for example, in an RRC connected state, and the UE is not at a cell edge, the UE may skip one or more RRM measurements at step 542. In some aspects, the UE relaxes the RRM measurements of the serving cell based on the radio link reception level value satisfying the RSRP threshold for relaxation during at least a relaxation search period for fixed UEs. For example, as indicated in the RRM measurement relaxation criteria, the UE may be allowed to perform reduced RRM measurements, skip RRM measurements, or stop RRM measurements if the UE is not at a cell edge. In some aspects, the RRM measurement relaxation criteria may include an RSRP threshold for relaxation. In some aspects, the RRM measurement relaxation criteria may include an RSRQ threshold for relaxation. In some aspects, if the UE has satisfied the threshold within a time period T3, the UE may determine to skip one or more RRM measurements. For example, if Srxlev > RSRP threshold for at least T3, the UE may relax or stop RRM measurements on the current serving cell, depending on the configuration of the base station or the configuration of the UE. 542 may include combining e.g. Figure 4 All aspects of the 405 description.

[0085] In some aspects, at 544, the UE may perform a reassessment based on the RRM measurement relaxation criteria after a duration for relaxing or stopping one or more RRM measurements of the fixed UE or in response to a trigger, such as by re-performing 530 after stopping the measurements for a period of time T4. In some aspects, the UE may re-enter 530 and re-determine whether to perform RRM measurements after determining a triggering event A3 (neighboring cell measurements become better than serving cell measurements by at least an offset) or event A5 (serving cell measurements become worse than a first threshold and neighboring cell measurements become better than a second defined threshold). In some aspects, at 544, the UE may resume default RRM measurements, which may include combining, e.g. Figure 4 All aspects of the 405 description.

[0086] In some aspects, if the UE is in an RRC idle or inactive state, then at 546, the UE may reduce neighbor cell measurements in response to determining that the UE meets the RRM measurement relaxation criteria for a fixed UE. In some aspects, the UE may perform neighbor cell measurements on a subset of neighbor cells. In some aspects, the UE may perform neighbor cell measurements on a subset of one or more neighbor cells that are spatially associated with a subset of SSBs transmitted by a current serving cell (e.g., a subset of K SSBs with the best measurements). Reducing neighbor cell measurements at 546 may include combining, for example, Figure 4 405. For example, the UE may receive an indication from a base station that SSB #1 is associated with neighboring cells A, B, and C, and may indicate that SSB #2 is associated with neighboring cells D and E. The UE may limit RRM measurements to neighboring cells that are spatially associated with the best K SSBs of its current serving cell. For example, K may be an integer, and the K best SSBs of the current serving cell may correspond to multiple (K) SSBs from the serving cell with the best measurement for the UE. For example, if K=1 and the SSB has the best measurement, the UE may limit RRM measurements to neighboring cells A, B, and C without performing RRM measurements on neighboring cells D and E. In some aspects, the UE determines the association between the neighboring cell and the SSB based on an indication in system information from the network. In some aspects, the UE determines the association between the neighboring cell and the SSB based on a configuration by the network. In some aspects, an indication of the K value may be provided in the system information of the cell. In some aspects, an indication of the K value may be provided in a configuration for the UE.

[0087] In some aspects, if the UE is in an RRC idle or inactive state, then at 548, the UE may skip one or more RRM measurements regardless of the location of the UE within the cell. In some aspects, the RRM measurement relaxation criteria for fixed UEs include a reduced time threshold or a reduced reception level value from a low mobility UE criterion. By way of example, the low mobility UE criterion may include SrxlevRef minus Srxlev greater than S SearchDeltaP In some aspects, when a new serving cell is selected or reselected and Srxlev minus SrxlevRef is greater than zero, and if at T SearchDeltaPIf the relaxation criteria are not met within a period of time, SrxlevRef is set to Srxlev. In some aspects, the UE may skip one or more RRM measurements for a period of time based on the UE's radio link reception level value. In some aspects, skipping one or more RRM measurements includes stopping at least one of intra-frequency measurements, inter-frequency measurements of the same or lower priority, or lower priority inter-radio access technology (IRAT) measurements for a period of time. Skipping one or more RRM measurements at 548 may include combining, for example, Figure 4 All aspects of the 405 description.

[0088] At 550, the UE may continue, such as by continuing to determine whether the UE meets the RRM measurement relaxation criteria for fixed UEs as appropriate.

[0089] Above Figure 5 Each block in the flowchart and each aspect performed by UE 104, 350, 404 may be performed by a component, and the device may include one or more of these components. The component may be one or more hardware components that are specifically configured to implement the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof. The system may be a component of UE350, which may include memory 360, TX processor 368, RX processor 356, and controller / processor 359. Alternatively, the processing system may be the entire UE (e.g., see Figure 3 of 350).

[0090] In one configuration, an apparatus for wireless communication at a UE may include a method for performing Figure 5 any aspect of the flowcharts in or by the UE in Figure 4 The aforementioned means may be one or more of the aforementioned components of the device and / or the processing system of the device may be configured to perform the functions listed in the aforementioned means. The processing system may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the aforementioned means may be a TX processor 368, an RX processor 356, and a controller / processor 359 configured to perform the functions listed in the aforementioned means.

[0091] Figure 66 is a flow chart of a method 600 of wireless communication. The method may be performed by a base station or a component of a base station, such as a transceiver (e.g., base station 102, 180, 310, 402; a processing system, which may include a memory 376 and which may be the entire base station 310 or a component of the base station 310, such as a TX processor 316, an RX processor 370 and / or a controller / processor 375, a device 802). The method may enable the base station to relax RRM measurements for the UE.

[0092] At 610, the base station may receive an indication from the UE indicating that the UE is fixed. In some aspects, the indication may include UE capabilities received during connection establishment with the UE. In some aspects, the indication may indicate that the UE does not support one or more mobility-related features. In some aspects, the one or more mobility-related features include at least one of CRI-RS mobility, uplink timing maintenance, or periodic CSI reporting. In some aspects, the indication also includes a preferred configuration for RRM measurements from the UE. In some aspects, the preferred configuration for RRM measurements is received in the UAI. The indication may include in combination with, for example, Figure 4 In some aspects, 610 may include the following aspects: Figure 8 The capability receiving component 842 executes.

[0093] At 620, the base station may transmit a configuration including an RRM measurement relaxation criterion for the fixed UE in response to the indication. In some aspects, the configuration includes the RRM measurement relaxation criterion, the RRM measurement relaxation criterion including one or more of the following: a first indication to relax the RRM measurement of the fixed UE, a second indication to stop the RRM measurement of the fixed UE, a reference signal received power (RSRP) threshold for relaxing the fixed UE, a measurement scaling factor for the fixed UE, a relaxation search period for the fixed UE, or a duration for relaxing or stopping one or more RRM measurements of the fixed UE. In some aspects, the RRM measurement relaxation criterion for the fixed UE is different from the default measurement relaxation criterion. The configuration including the RRM measurement relaxation criterion may include combining Figure 4 In some aspects, 620 may be composed of Figure 8 The standard launch component 844 in is executed.

[0094] At 630, the base station may transmit an indication indicating an association between one or more neighboring cells and the SSB of the cell. For example, the base station may indicate that SSB #1 is associated with neighboring cells A, B, and C, and may indicate that SSB #2 is associated with neighboring cells D and E. The indication may include a combination of Figure 4Aspects described. The UE may limit RRM measurements to neighboring cells that are spatially associated with the best K SSBs of its current serving cell. A subset of neighboring cells may be identified based on measurements of the SSBs. For example, K may be an integer, and the K best SSBs of the current serving cell may correspond to multiple (K) SSBs from the serving cell with the best measurement for the UE. For example, if K=1 and the SSB has the best measurement, the UE may limit RRM measurements to neighboring cells A, B, and C, and not perform RRM measurements on neighboring cells D and E. In some aspects, an indication of the K value may be provided in system information for the cell. In some aspects, an indication of the K value may be provided in a configuration for the UE. In some aspects, 630 may be provided by Figure 8 The associated instruction component 846 in is executed.

[0095] Above Figure 6 Each box in the flowchart and various aspects performed by the base station 102, 180, 310, 402 can be performed by at least one component of the device, each component being one or more hardware components, and the one or more hardware components are specifically configured to implement the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof. The component can be a software component running in a processor, residing / stored in a computer-readable medium / memory, one or more hardware components coupled to a processor, or some combination thereof. The system can be a component of the base station 310 and can include a memory 376 and / or at least one of the TX processor 316, the RX processor 370, and the controller / processor 375. Alternatively, the processing system can be the entire base station (e.g., see Figure 3 of 310).

[0096] In one configuration, an apparatus for wireless communication at a base station may include a method for performing a combined Figure 5 Any aspect of the flowcharts described herein or by a base station in Figure 4 The aforementioned means may be one or more of the aforementioned components of the device and / or a processing system of the device configured to perform the functions listed in the aforementioned means. As described above, the processing system may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the aforementioned means may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions listed in the aforementioned means.

[0097] Figure 7700 is a diagram illustrating an example of a hardware implementation of a device 702. The device 702 may be a UE or a component of a UE. In some aspects, the device 702 may include a cellular baseband processor 704 (also referred to as a modem) coupled to a cellular RF transceiver 722. The device may also include one or more subscriber identity modules (SIM) cards 720, an application processor 706 coupled to a secure digital (SD) card 708 and a screen 710, a Bluetooth module 712, a wireless local area network (WLAN) module 714, a global positioning system (GPS) module 716, and / or a power supply 718. The cellular baseband processor 704 communicates with the UE 104 and / or the BS 102 / 180 via the cellular RF transceiver 722. The cellular baseband processor 704 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 704 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 704, causes the cellular baseband processor 704 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 704 when executing the software. The cellular baseband processor 704 also includes a receiving component 730, a communication manager 732, and a transmitting component 734. The communication manager 732 includes one or more of the components shown. The components within the communication manager 732 may be stored in a computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 704. The cellular baseband processor 704 may be a component of the UE 350 and may include a memory 360 and / or at least one of a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 702 may be a modem chip and include only the baseband processor 704, and in another configuration, the device 702 may be the entire UE (e.g., see Figure 3 350 ) and includes additional modules of device 702 .

[0098] The communication manager 732 may include a capability indication component 742, which may be configured to transmit an RRM measurement configuration or capability indication, for example, as described in conjunction with Figure 5 The communication manager 732 may also include a relaxation standard component 744, which may be configured to receive an RRM measurement relaxation standard, for example, as described in conjunction with Figure 5 The communication manager 732 may also include a determination component 746, which may be configured to determine whether the UE meets the RRM measurement relaxation criteria for the fixed UE, for example, as combined with Figure 5The communication manager 732 may also include a relaxation component 748, which may be configured to skip one or more RRM measurements based on an RRM measurement relaxation criterion, for example, as described in conjunction with Figure 5 As described in 540.

[0099] The device may include executing Figure 5 The additional components of each box of the algorithm in the above flowchart. In this way, Figure 5 Each block in the above flowchart may be performed by a component, and the device may include one or more of these components. The component may be one or more hardware components that are specifically configured to implement the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0100] In one configuration, the device 702, in particular the cellular baseband processor 704, includes a device for receiving an RRM measurement relaxation criterion for a fixed UE from a base station. The cellular baseband processor 704 may also include a device for skipping one or more RRM measurements based on the RRM measurement relaxation criterion for the fixed UE. The cellular baseband processor 704 may also include a device for reducing neighbor cell measurements by performing neighbor cell measurements on a subset of neighbor cells in response to determining that the UE meets the RRM measurement relaxation criterion for the fixed UE. The cellular baseband processor 704 may also include a device for receiving a configuration of the RRM measurement relaxation criterion for the fixed UE. The cellular baseband processor 704 may also include a device for performing a reassessment based on the RRM measurement relaxation criterion after relaxing or stopping the duration of one or more RRM measurements of the fixed UE or in response to a trigger. The cellular baseband processor 704 may also include a device for restoring the default RRM measurement if the reassessment does not meet the RRM measurement relaxation criterion. The cellular baseband processor 704 may also include a device for transmitting an indication to the base station that the UE is fixed. The cellular baseband processor 704 may also include means for receiving, in response to the indication, a configuration including a relaxation criteria for RRM measurements for fixed UEs.The cellular baseband processor 704 may also include means for indicating a preferred configuration for RRM measurements in the UAI.

[0101] The aforementioned means may be one or more of the aforementioned components of the device 702 configured to perform the functions listed in the aforementioned means. As described above, the device 702 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the aforementioned means may be a TX processor 368, an RX processor 356, and a controller / processor 359 configured to perform the functions listed in the aforementioned means.

[0102] Figure 8 800 is a diagram showing an example of a hardware implementation of a device 802. The device 802 may be a base station or a component of a base station. The device 802 may include a baseband unit 804. The baseband unit 804 may communicate with the UE 104 via a cellular RF transceiver 822. The baseband unit 804 may include a computer-readable medium / memory. The baseband unit 804 is responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the baseband unit 804, causes the baseband unit 804 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the baseband unit 804 when executing the software. The baseband unit 804 also includes a receiving component 830, a communication manager 832, and a transmitting component 834. The communication manager 832 includes one or more of the components shown. The components within the communication manager 832 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 804. The baseband unit 804 may be a component of the BS 310 and may include the memory 376 and / or at least one of the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0103] The communication manager 832 may include a capability receiving component 842 that may receive an RRM measurement configuration / capability indication, such as in conjunction with Figure 6 The communication manager 832 may also include a standard transmission component 844, which may transmit the RRM measurement relaxation standard, for example, as combined with Figure 6 The communication manager 832 may also include an association indication component 846 that may transmit an indication of an association between one or more neighboring cells and the SSB of the cell, for example, as described in conjunction with Figure 6 As described in 630.

[0104] The device may include executing Figure 6 The additional components of each box of the algorithm in the above flowchart. In this way, Figure 6 Each block in the above flowchart may be performed by a component, and the device may include one or more of these components. The component may be one or more hardware components that are specifically configured to implement the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0105] In one configuration, the device 802, in particular the baseband unit 804, includes a device for receiving an indication from the UE that the UE is fixed, wherein the indication includes UE capabilities received during connection establishment with the UE. The baseband unit 804 may also include a device for transmitting a configuration including a relaxation of RRM measurement criteria for fixed UEs in response to the indication. The baseband unit 804 may also include a device for receiving a preferred configuration for RRM measurements from the UE. The baseband unit 804 may also include a device for indicating an association between one or more neighboring cells and the SSBs of the cell in system information or a configuration of the UE. The baseband unit 804 may also include a device for indicating a number K for the UE to perform neighbor cell measurements on a subset of neighboring cells associated with a subset of K SSBs with the highest radio link reception level.

[0106] The aforementioned means may be one or more of the aforementioned components of the device 802 configured to perform the functions listed in the aforementioned means. As described above, the device 802 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the aforementioned means may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions listed in the aforementioned means.

[0107] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is an illustration of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged. In addition, some blocks can be combined or omitted. The attached method claims present the elements of the various blocks in a sample order and are not meant to be limited to the specific order or hierarchy presented.

[0108] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but should be given a full scope consistent with the language of the claims, wherein unless otherwise specifically stated, reference to an element in the singular is not intended to mean "one and only one", but "one or more". Terms such as "if", "when..." and "when..." should be interpreted as "under..." conditions, rather than implying a direct temporal relationship or reaction. That is, these phrases, such as "when...", do not mean to respond to or take action immediately during the occurrence of an action, but only imply that if the condition is met, an action will occur, but no specific or immediate time constraints are required for the occurrence of the action. The word "exemplary" is used herein to mean "serving as an example, instance or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or advantageous relative to other examples. Unless otherwise specifically stated, the term "some" refers to one or more. Expressions such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, expressions such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “A, B, C, or any combination thereof” may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various embodiments described throughout the present disclosure that are known or later will be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly stated in the claims. The words “module”, “mechanism”, “element”, “device”, etc. cannot replace the word “means”. Therefore, any claim element should not be interpreted as a means-plus-function unless the element is explicitly recited using the phrase “means for . . . ”

[0109] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0110] Aspect 1 is a method of wireless communication at a UE, comprising: receiving an RRM measurement relaxation criterion for a fixed UE from a base station; and skipping one or more RRM measurements based on the RRM measurement relaxation criterion for the fixed UE.

[0111] Aspect 2 is a method according to aspect 1, wherein the UE is in an RRC idle or RRC inactive state.

[0112] Aspect 3 is a method according to any one of aspects 1-2, wherein the RRM measurement relaxation criteria for the fixed UE includes a reduced time threshold or a reduced reception level value from a low mobility UE criterion.

[0113] Aspect 4 is a method according to any one of aspects 1-3, wherein the UE skips the one or more RRM measurements for a period of time based on a radio link reception level value of the UE.

[0114] Aspect 5 is a method according to any one of aspects 1-4, wherein skipping the one or more RRM measurements includes stopping at least one of intra-frequency measurements, inter-frequency measurements of the same or lower priority, or lower priority IRAT measurements for a period of time.

[0115] Aspect 6 is a method according to any one of aspects 1-5, wherein the receiving and the skipping are performed by a transceiver of the UE.

[0116] Aspect 7 is a method according to any one of aspects 1-6, further comprising: reducing neighbor cell measurements by performing neighbor cell measurements on a subset of neighbor cells in response to determining that the UE meets the RRM measurement relaxation criteria for the fixed UE.

[0117] Aspect 8 is a method according to any one of Aspects 1-7, wherein the UE performs the neighbor cell measurement on a subset of one or more neighbor cells associated with a subset of SSBs transmitted by a serving cell of the UE, wherein the subset of one or more neighbor cells is identified based on the measurement of the SSB set.

[0118] Aspect 9 is a method according to any one of aspects 1-8, wherein the UE performs the neighbor cell measurement on a subset of the one or more neighbor cells associated with a subset of SSBs transmitted by the UE's serving cell.

[0119] Aspect 10 is a method according to any one of aspects 1-9, wherein the UE determines the association between the neighboring cell and the SSB based on an indication in system information from a network or a configuration performed by the network.

[0120] Aspect 11 is a method according to any one of Aspects 1-10, wherein the SSB subset includes K SSBs having the highest radio link reception level from the SSB transmitted by the serving cell, wherein K is an integer, and wherein the UE determines the value of K based on an indication in system information from the network or a configuration performed by the network.

[0121] Aspect 12 is a method according to any one of aspects 1-11, wherein the UE is in an RRC connected state.

[0122] Aspect 13 is a method according to any one of aspects 1-12, wherein if the location of the UE is a certain distance away from a cell edge, the UE skips the one or more RRM measurements.

[0123] Aspect 14 is a method according to any one of Aspects 1-13, further comprising: receiving a configuration of the RRM measurement relaxation criteria for the fixed UE, wherein the RRM measurement relaxation criteria include one or more of the following: a first indication to relax the RRM measurement of the fixed UE, a second indication to stop the RRM measurement of the fixed UE, a relaxation of the RSRP threshold of the fixed UE, a measurement scaling factor for the fixed UE, a relaxation search period for the fixed UE, or a duration for relaxing or stopping the one or more RRM measurements of the fixed UE.

[0124] Aspect 15 is a method according to any one of aspects 1-14, wherein the UE relaxes the RRM measurement based on a radio link reception level value satisfying the RSRP threshold for relaxation within the relaxation search period of at least the fixed UE.

[0125] Aspect 16 is a method according to any one of aspects 1-15, further comprising: performing a re-evaluation based on the RRM measurement relaxation criteria after a duration of relaxing or stopping the one or more RRM measurements of the fixed UE or in response to a trigger.

[0126] Aspect 17 is a method according to any one of aspects 1-16, further comprising: if the re-evaluation does not meet the RRM measurement relaxation criteria, restoring default RRM measurements.

[0127] Aspect 18 is a method according to any one of aspects 1-17, further comprising: transmitting an indication to the base station that the UE is fixed; and receiving a configuration including the RRM measurement relaxation criteria for the fixed UE in response to the indication.

[0128] Aspect 19 is a method according to any one of aspects 1-18, wherein the UE transmits the indication as a UE capability signaled during establishment of a connection with the base station.

[0129] Aspect 20 is a method according to any one of Aspects 1-19, wherein the indication indicates that the UE does not support one or more mobility-related features, and wherein the one or more mobility-related features include at least one of CSI-RS mobility, uplink timing maintenance, or periodic channel state information reporting.

[0130] Aspect 21 is a method according to any one of aspects 1-20, further comprising: indicating a preferred configuration of RRM measurements in the UAI.

[0131] Aspect 22 is a method for wireless communication at a base station, comprising: receiving an indication from a UE that the UE is fixed, wherein the indication includes UE capabilities received during connection establishment with the UE; and transmitting a configuration including RRM measurement relaxation criteria for the fixed UE in response to the indication.

[0132] Aspect 23 is a method according to aspect 22, wherein the indication indicates that the UE does not support one or more mobility-related features, and wherein the one or more mobility-related features include at least one of CSI-RS mobility, uplink timing maintenance, or periodic channel state information reporting.

[0133] Aspect 24 is a method according to any one of aspects 22-23, further comprising: receiving a preferred configuration for RRM measurement from the UE, wherein the preferred configuration for the RRM measurement is received in a UAI.

[0134] Aspect 25 is a method according to any one of aspects 22-24, further comprising: indicating an association between one or more neighboring cells and the SSB of the cell in system information or UE configuration.

[0135] Aspect 26 is a method according to any one of aspects 22-25, further comprising: indicating a number K for the UE to perform neighbor cell measurements on a subset of neighbor cells associated with a subset of K SSBs having the highest radio link reception level.

[0136] Aspect 27 is a method according to any one of Aspects 22-26, wherein the configuration of the RRM measurement relaxation criteria includes one or more of the following: a first indication to relax the RRM measurement for the fixed UE, a second indication to stop the RRM measurement for the fixed UE, a RSRP threshold for relaxing the fixed UE, a measurement scaling factor for the fixed UE, a relaxation search period for the fixed UE, or a duration for relaxing or stopping one or more RRM measurements of the fixed UE.

[0137] Aspect 28 is a method according to any one of aspects 22-27, wherein the RRM measurement relaxation criteria for the fixed UE is different from a default measurement relaxation criteria.

[0138] Aspect 29 is a device for wireless communication, comprising: at least one processor, the at least one processor being coupled to a memory and configured to perform a method according to any one of aspects 1 to 21.

[0139] Aspect 30 is an apparatus for wireless communication, comprising: at least one processor coupled to a memory and configured to perform a method according to any one of aspects 22 to 28.

[0140] Aspect 31 is an apparatus for wireless communication, comprising: a device for performing a method according to any one of aspects 1 to 21.

[0141] Aspect 32 is an apparatus for wireless communication, comprising: means for performing the method according to any one of aspects 22 to 28.

[0142] Aspect 33 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to perform the method according to any one of aspects 1 to 21.

[0143] Aspect 34 is a computer readable medium storing computer executable code, wherein the code, when executed by a processor, causes the processor to perform the method according to any one of aspects 22 to 28.

Claims

1. A method for wireless communication at a user equipment UE, comprising: receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; as well as At least one modified RRM measurement is performed by the UE based at least in part on the received fixed UE RRM measurement relaxation criterion.

2. The method according to claim 1, wherein: The UE is in a radio resource control (RRC) idle state or an RRC inactive state.

3. The method according to claim 1, wherein: The fixed UE RRM measurement relaxation criteria include a reduced time threshold or a reduced reception level value from the low mobility UE criteria.

4. The method according to claim 1, wherein: The at least one modified RRM measurement is modified over a period of time based on a radio link reception level value of the UE.

5. The method according to claim 1, wherein: The at least one modified RRM measurement comprises ceasing at least one of intra-frequency measurements, inter-frequency measurements of the same or lower priority, or lower priority Inter-Radio Access Technology (IRAT) measurements for a period of time.

6. The method according to claim 1, wherein: The receiving and the executing are performed by a transceiver of the UE.

7. The method according to claim 1, wherein: The at least one modified RRM measurement comprises: Neighbor cell measurements are reduced by performing neighbor cell measurements on a subset of one or more neighbor cells in response to determining that the UE satisfies the fixed UE RRM measurement relaxation criteria.

8. The method according to claim 7, wherein: The UE performs the neighbor cell measurement on a subset of one or more neighbor cells associated with a subset of synchronization signal blocks SSB transmitted by a serving cell of the UE, wherein the subset of one or more neighbor cells is identified based on the measurement of the subset of SSB.

9. The method according to claim 8, wherein: The UE performs the neighbor cell measurements on a subset of the one or more neighbor cells associated with a subset of SSBs transmitted by the serving cell.

10. The method according to claim 8, wherein: The UE determines the association between the one or more neighboring cells and the SSB based on an indication in system information from a network or a configuration performed by the network.

11. The method according to claim 8, wherein: The subset of SSBs includes K SSBs having the highest radio link reception levels from the SSBs transmitted by the serving cell, where K is an integer, and wherein the UE determines the value of K based on an indication in system information from a network or a configuration performed by the network.

12. The method according to claim 1, wherein: The UE is in a radio resource control (RRC) connected state.

13. The method according to claim 1, wherein: The at least one modified RRM measurement includes skipping one or more RRM measurements based on the location of the UE being a threshold distance from a cell edge.

14. The method according to claim 12, further comprising: receiving a configuration of the fixed UE RRM measurement relaxation criteria, wherein the fixed UE RRM measurement relaxation criteria comprises one or more of the following: The first indication to relax the RRM measurement of the fixed UE, a second indication to stop one or more RRM measurements of the fixed UE, Used to relax the reference signal received power RSRP threshold of the fixed UE, a measurement scaling factor for the fixed UE, a relaxed search period for the fixed UE, or The duration for relaxing or stopping one or more RRM measurements of the fixed UE.

15. The method according to claim 14, wherein: The at least one modified RRM measurement comprises reducing the one or more RRM measurements based on a radio link reception level value satisfying an RSRP threshold for relaxation within at least a relaxation search period of the fixed UE.

16. The method according to claim 15, further comprising: A re-evaluation is performed based on the fixed UE RRM measurement relaxation criteria after a duration of relaxing or stopping one or more RRM measurements of the fixed UE or in response to a trigger.

17. The method according to claim 16, further comprising: If the re-evaluation does not satisfy the fixed UE RRM measurement relaxation criteria, then resuming default RRM measurement.

18. The method of claim 1, further comprising: transmitting an indication to a base station that the UE is stationary; as well as A configuration including the fixed UE RRM measurement relaxation criteria is received in response to the indication.

19. The method according to claim 18, wherein: The UE transmits the indication as a UE capability signaled during establishment of a connection with the base station.

20. The method according to claim 19, wherein: The indication indicates that the UE does not support one or more mobility-related features, and wherein the one or more mobility-related features include at least one of channel state information reference signal CSI-RS mobility, uplink timing maintenance, or periodic channel state information reporting.

21. The method according to claim 20, further comprising: The preferred configuration of RRM measurements is indicated in the UE assistance information UAI.

22. The method according to claim 1, wherein: The at least one modified RRM measurement includes skipping at least one RRM measurement.

23. The method according to claim 1, wherein: The at least one modified RRM measurement includes relaxing at least one RRM measurement.

24. The method according to claim 1, wherein: The at least one modified RRM measurement comprises performing a reduced number of RRM measurements.

25. A method for wireless communication at a base station, comprising: receiving, from a user equipment UE, an indication that the UE is stationary, wherein the indication comprises UE capabilities received by the base station during establishment of a connection with the UE; as well as A configuration including a fixed UE radio resource management (RRM) measurement relaxation criterion is transmitted in response to the indication, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

26. The method according to claim 25, wherein: The indication indicates that the UE does not support one or more mobility-related features, and wherein the one or more mobility-related features include at least one of channel state information reference signal CSI-RS mobility, uplink timing maintenance, or periodic channel state information reporting.

27. The method of claim 25, further comprising: A preferred configuration for RRM measurements is received from the UE, wherein the preferred configuration for the RRM measurements is received in UE assistance information UAI.

28. The method of claim 25, further comprising: The association between one or more neighboring cells and the synchronization signal block SSB of the cell is indicated in the system information or UE configuration.

29. The method according to claim 28, further comprising: An integer K is indicated for the UE to perform neighbor cell measurements on a subset of neighbor cells associated with a subset of K SSBs having the highest radio link reception levels.

30. The method of claim 25, wherein: The configuration of the fixed UE RRM measurement relaxation criteria includes one or more of the following: Relax the first indication for RRM measurements for fixed UEs, a second indication to stop one or more RRM measurements for the fixed UE, Used to relax the reference signal received power RSRP threshold of the fixed UE, a measurement scaling factor for the fixed UE, a relaxed search period for the fixed UE, or The duration for relaxing or stopping one or more RRM measurements of the fixed UE.

31. The method of claim 25, wherein: The fixed UE RRM measurement relaxation standard is different from the default measurement relaxation standard.

32. An apparatus for wireless communication at a user equipment UE, comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and At least one modified RRM measurement is performed by the UE based at least in part on the received fixed UE RRM measurement relaxation criterion.

33. The device according to claim 32, wherein: The UE is in a radio resource control (RRC) idle state or an RRC inactive state.

34. The device according to claim 32, wherein: The fixed UE RRM measurement relaxation criteria include a reduced time threshold or a reduced reception level value from the low mobility UE criteria.

35. The device according to claim 32, wherein: The at least one modified RRM measurement is modified over a period of time based on a radio link reception level value of the UE.

36. The apparatus of claim 32, wherein: The at least one modified RRM measurement comprises ceasing at least one of intra-frequency measurements, inter-frequency measurements of the same or lower priority, or lower priority Inter-Radio Access Technology (IRAT) measurements for a period of time.

37. The device according to claim 32, wherein: The at least one processor is configured to receive the fixed UE RRM measurement relaxation criteria and to perform the at least one modified RRM measurement via a transceiver of the UE.

38. The apparatus of claim 32, wherein: The at least one modified RRM measurement comprises: Neighbor cell measurements are reduced by performing neighbor cell measurements on a subset of one or more neighbor cells in response to determining that the UE satisfies the fixed UE RRM measurement relaxation criteria.

39. The device according to claim 32, wherein: The UE is in a radio resource control (RRC) connected state.

40. The apparatus of claim 32, wherein: The at least one modified RRM measurement includes skipping one or more RRM measurements based on the location of the UE being a threshold distance from a cell edge.

41. The apparatus of claim 32, wherein: The at least one processor is further configured to: transmitting an indication to a base station that the UE is stationary; and A configuration including the fixed UE RRM measurement relaxation criteria is received in response to the indication.

42. The apparatus of claim 32, wherein: The at least one modified RRM measurement includes skipping at least one RRM measurement.

43. The apparatus of claim 32, wherein: The at least one modified RRM measurement includes relaxing at least one RRM measurement.

44. The apparatus of claim 32, wherein: The at least one modified RRM measurement comprises performing a reduced number of RRM measurements.

45. An apparatus for wireless communication at a base station, comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving, from a user equipment UE, an indication that the UE is stationary, wherein the indication comprises UE capabilities received by the base station during establishment of a connection with the UE; as well as A configuration including a fixed UE radio resource management (RRM) measurement relaxation criterion is transmitted in response to the indication, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

46. ​​The device according to claim 45, wherein The indication indicates that the UE does not support one or more mobility-related features, and wherein the one or more mobility-related features include at least one of channel state information reference signal CSI-RS mobility, uplink timing maintenance, or periodic channel state information reporting.

47. The device according to claim 45, wherein The at least one processor is further configured to: A preferred configuration for RRM measurements is received from the UE, wherein the preferred configuration for the RRM measurements is received in UE assistance information UAI.

48. The apparatus of claim 45, wherein: The at least one processor is further configured to: The association between one or more neighboring cells and the synchronization signal block SSB of the cell is indicated in the system information or UE configuration.

49. The apparatus of claim 45, wherein: The configuration of the fixed UE RRM measurement relaxation criteria includes one or more of the following: Relax the first indication for RRM measurements for fixed UEs, a second indication to stop one or more RRM measurements for the fixed UE, Used to relax the reference signal received power RSRP threshold of the fixed UE, a measurement scaling factor for the fixed UE, a relaxed search period for the fixed UE, or The duration for relaxing or stopping one or more RRM measurements of the fixed UE.

50. The apparatus of claim 45, wherein: The fixed UE RRM measurement relaxation standard is different from the default measurement relaxation standard.

51. An apparatus for wireless communication at a user equipment UE, comprising: means for receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; as well as Means for performing, by the UE, at least one modified RRM measurement based at least in part on the received fixed UE RRM measurement relaxation criteria.

52. An apparatus for wireless communication at a base station, comprising: means for receiving, from a user equipment (UE), an indication that the UE is stationary, wherein the indication comprises UE capabilities received by the base station during establishment of a connection with the UE; as well as Means for transmitting, in response to the indication, a signal including a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

53. A non-transitory computer readable medium having stored thereon instructions, the instructions, when executed by a processor, performing operations for wireless communications by a user equipment (UE), the operations comprising: receiving, by the UE, a fixed UE radio resource management (RRM) measurement relaxation criterion, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion; and At least one modified RRM measurement is performed by the UE based at least in part on the received fixed UE RRM measurement relaxation criterion.

54. A non-transitory computer readable medium having stored thereon instructions that, when executed by a processor, perform operations for wireless communications by a base station, the operations comprising: receiving, from a user equipment UE, an indication that the UE is stationary, wherein the indication comprises UE capabilities received by the base station during establishment of a connection with the UE; and A configuration including a fixed UE radio resource management (RRM) measurement relaxation criterion is transmitted in response to the indication, wherein the fixed UE RRM measurement relaxation criterion is different from a mobile UE RRM measurement relaxation criterion.

Images