Measurement gaps and scheduling

Abstract

This provides aspects that allow a UE to trigger the initiation of an SR procedure in response to a reduction in the amount of data received after a measurement gap or a decrease in the amount of uplink permission granted. The UE receives data from a first base station. The UE performs measurements on downlink signals from a second base station based on a measurement configuration. The UE transmits a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data. As a result, inefficient data interruptions caused by erroneous DRX determination by the base station can be avoided.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of U.S. Provisional Application S / N. 63 / 108,726 entitled “MEASUREMENT GAP AND SCHEDULING”, filed November 2, 2020, and U.S. Patent Application No. 17 / 451,626 entitled “MEASUREMENT GAP AND SCHEDULING”, filed October 20, 2021, the disclosures of which are expressly incorporated herein by reference in their entirety.

[0003] background Technical Field

[0005] This disclosure generally relates to communication systems, and more particularly to wireless communication systems between user equipment (UE) and base stations.

[0006] introduction

[0007] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that enable 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.

[0008] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the city, country, region, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the continuous evolution of mobile broadband, promulgated by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR can be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements can also be applied to other multiple access technologies and telecommunications standards that adopt them.

[0009] Overview

[0010] The following provides a brief overview of one or more aspects to offer a basic understanding of such aspects. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify the key or decisive 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 an introduction to the more detailed description that follows.

[0011] In one aspect of this disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus may be a UE (User Equipment). The apparatus receives data from a first base station. The apparatus performs measurements on downlink signals from a second base station based on a measurement configuration. The apparatus transmits a scheduling request in response to a decrease in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0012] To achieve the foregoing and related objectives, these one or more aspects include the features fully described below and specifically pointed out in the claims. Certain illustrative features of these one or more aspects are set forth in detail in the following description and drawings. However, these features merely indicate a few of the various ways in which the principles of these various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. Brief description of the attached diagram

[0014] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network.

[0015] Figure 2A This is an example illustration of the first frame explaining various aspects of this disclosure.

[0016] Figure 2B This is a diagram illustrating an example of a DL channel within a subframe according to various aspects of this disclosure.

[0017] Figure 2C This is an example illustration of the second frame explaining various aspects of this disclosure.

[0018] Figure 2D This is a diagram illustrating an example of a UL channel within a subframe according to various aspects of this disclosure.

[0019] Figure 3 This is a diagram illustrating an example of a base station and user equipment (UE) in an access network.

[0020] Figure 4 This is a diagram illustrating an example of measuring gaps.

[0021] Figure 5 This is a diagram illustrating communication between the UE and different base stations.

[0022] Figure 6 It is a call flow diagram between the UE and multiple base stations.

[0023] Figure 7 This is a flowchart of a wireless communication method.

[0024] Figure 8 This is a diagram illustrating an example of the hardware implementation of the example device.

[0025] Detailed description

[0026] The detailed description that follows, taken in conjunction with the accompanying drawings, is intended as a description of various configurations and is not intended to represent only the configurations in which the concepts described herein can be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0027] The base station can execute various radio resource management (RRM) procedures, such as handover, radio resource control (RRC) reconfiguration, and data scheduling, in response to information provided by the UE. For example, the base station can perform outer loop link adaptation (OLLA) to improve the radio link with the UE in response to channel measurements performed by the UE, Hybrid Automatic Repeat Request (HARQ) feedback from the UE, or other information from the UE (e.g., radio link control (RLC) information and upper layer acknowledgments).

[0028] Regarding channel measurements, the base station may (e.g., in an RRC reconfiguration message) provide the UE with a measurement configuration that configures the UE to perform and report such measurements. For example, the measurement configuration may include one or more measurement objects indicating the frequency, time location, and subcarrier spacing of reference signals (e.g., synchronization signal block (SSB), channel state information reference signal (CSI-RS), demodulation reference signal (DMRS), etc.) to be measured by the UE; reporting configuration for each measurement object (e.g., event-triggered reporting or periodic reporting); measurement intervals indicating the time periods during which the UE can perform measurements; and other measurement criteria. Based on the measurement configuration, the UE can report to the base station intra-frequency 5G New Radio (NR) measurements, inter-frequency NR measurements, or Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) frequency measurements (e.g., 4G Long Term Evolution (LTE) Radio Access Technology (RAT) measurements). For example, during a configured measurement interval, a UE connected to the serving cell on one frequency and in one RAT can measure the Reference Signal Received Power (RSRP) of a configured reference signal in a neighboring cell on the same frequency, different frequencies, or different RATs, and the UE can report the measurement to the base station if the measurement exceeds a threshold. Based on the measurement, the base station can adapt its scheduling permission for the UE or execute other RRM procedures.

[0029] Additionally, the measurement configuration can also support Multiple Radio Dual Connectivity (MR-DC). In MR-DC, two distinct nodes or base stations (including a primary node (MN) and a secondary node (SN)) can provide resources and data to the UE. One type of MR-DC is E-UTRA-NR Dual Connectivity (EN-DC), where the MN is an evolved B-node (eNB in ​​LTE) and the SN is a next-generation B-node (gNB in ​​NR). Generally, in EN-DC, the eNB / MN sends an RRC message including the measurement configuration to the UE, while the gNB / SN sends data to the UE. The eNB / MN can also send data to the UE. The measurement configuration configured by the eNB / MN can include information similar to that described above (e.g., measurement objects, reporting configuration, measurement intervals, and other criteria), and the UE can similarly report intra-frequency, inter-frequency, or inter-RAT measurements to the eNB / MN or gNB / SN based on the measurement configuration. For example, during the configured measurement interval, a UE connected to the serving eNB and gNB in ​​the EN-DC can measure the RSRP of a configured reference signal in a neighboring cell, and the UE can report the measurement to the serving eNB or gNB if the measurement exceeds a threshold. Based on the measurement, the eNB / MN or gNB / SN can adapt its scheduling permission for the UE or execute other RRM procedures.

[0030] Generally, a UE may not be able to simultaneously measure the target carrier frequency in a neighboring cell while transmitting or receiving on the serving cell. Therefore, to enable the UE to perform such measurements, the base station (e.g., the eNB / MN in an EN-DC) can configure measurement gaps for the UE. During a measurement gap, the UE can retune its antenna to the frequency or RAT of a neighboring cell, perform measurements in the neighboring cell, and then retun its antenna back to the serving cell. The UE can periodically repeat the measurement process during each configured measurement gap.

[0031] However, in some situations, the serving base station may still send scheduling grants to the UE while it is performing measurements during a configured measurement gap. For example, in EN-DC, there may be a lack of measurement gap coordination between the eNB / MN providing the measurement configuration and the gNB / SN providing the scheduling grants for data. As a result, the gNB / SN may transmit scheduling grants to the UE during the measurement gap. Since the UE cannot receive the grants (because the UE has tuned away from the gNB / SN to perform measurements during these time periods), the UE may not report HARQ feedback to the base station confirming (or not confirming) the scheduling grants. Therefore, the base station may incorrectly determine that the UE is currently in discontinuous reception (DRX) mode based on the lack of HARQ feedback, and thus the base station may suppress further transmission of grants for a period of time. Generally, in DRX, the UE periodically monitors the radio channel for downlink data during the "on" period and reduces the power of most of its circuitry during the "off" period to conserve battery life. Therefore, the base station typically transmits data to the UE during the on period and suppresses data transmission to the UE during the off period to conserve resources. Correspondingly, the base station may suppress scheduling permission transmission to the UE for a period of time based on incorrect assumptions about the UE being in the off period, even if the UE may have completed its measurements, retuned back to the serving gNB / SN, and is in the on period during that time. This can lead to inefficiently interrupted data transmission to the UE, resulting in reduced data throughput.

[0032] To prevent such data interruptions in such situations, the UE can send a scheduling request (SR) to the serving base station after performing a measurement based on the measurement configuration. The SR informs the serving base station that the UE is not in the DRX off period and that there is data to be transmitted to the base station. For example, to initiate an SR procedure, the UE can trigger a buffer status report (BSR) (e.g., a regular BSR) in response to determining a decrease in the amount of data received from the serving base station after the measurement gap or a decrease in the amount of uplink permissions received from the serving base station. To identify whether such a decrease has occurred, the UE can first determine whether it received a threshold amount of data and / or a threshold amount of uplink permissions (e.g., x bytes of data and / or z number of permissions) from the base station within a threshold time amount (e.g., y ms before the measurement gap) before performing the measurement, where x, y, and z are pre-configured thresholds. If so, the UE can then determine whether it has tuned to a different frequency, RAT, or cell (relative to the serving base station's frequency, RAT, or cell) to perform the measurement during the measurement gap. Subsequently, the UE can determine whether, after the measurement is performed, it has not received another threshold amount of data and / or another threshold amount of uplink permission (e.g., a bytes of data and / or c number of permissions) from the base station within another threshold time period (e.g., b ms after the measurement gap), where a, b, and c are pre-configured thresholds and may be the same as or different from x, y, and z, respectively. If so, the UE can determine that a reduction in received data or received permission has occurred since the measurement gap, and the UE can accordingly transmit an SR to prevent the serving base station from incorrectly determining that the UE is in the DRX off period. That is, if the UE determines that it received a threshold amount of data and / or a threshold amount of uplink permission within the threshold time period before the measurement gap, but did not receive the same or different threshold amount of data and / or uplink permission within the threshold time period after the measurement gap (e.g., the threshold was met before the gap but not after the gap), the UE can conclude that a reduction in received data or received permission has occurred, and the UE can thus transmit an SR in response to this conclusion. This prevents data interruptions and increases data throughput.

[0033] Several aspects of a telecommunications system will now be described with reference to various apparatuses and methods. These apparatuses and methods will be described in detail below and explained in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0034] 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, system-on-a-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 the various functionalities described throughout this disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms.

[0035] Accordingly, in one or more example embodiments, the described functionality can be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality can be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available medium accessible to a computer. 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 disc storage, magnetic disk storage, other magnetic storage devices, combinations of computer-readable media of the types described above, or any other medium capable of being used to store computer-executable code in the form of instructions or data structures accessible to a computer.

[0036] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, user equipment (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 macrocells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macrocells include base stations. Small cells include femtocells, picocells, and microcells.

[0037] Base station 102 configured for 4G Long Term Evolution (LTE) (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). Base station 102 configured for 5G New Radio (NR) (collectively referred to as Next Generation RAN (NG-RAN)) can interface with core network 190 via a second backhaul link 184. Among other functions, base station 102 can also perform one or more of the following functions: user data delivery, radio channel cryptography and cryptography decoding, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of Non-Access Stratum (NAS) messages, NAS node selection, synchronization, Radio Access Network (RAN) sharing, Multimedia Broadcast Multicast Service (MBMS), subscriber and equipment tracking, RAN Information Management (RIM), paging, location, and delivery of alarm messages. Base station 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) on third backhaul link 134 (e.g., X2 interface). First backhaul link 132, second backhaul link 184 and third backhaul link 134 can be wired or wireless.

[0038] Base station 102 can wirelessly communicate with UE 104. Each base station 102 can provide communication coverage for its respective geographical coverage area 110. Overlapping geographical coverage areas 110 may exist. For example, small cell 102' may have coverage areas 110' that overlap with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. The heterogeneous network may also include a Home Evolved B Node (eNB) (HeNB) that can provide services to a restricted group referred to as a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may use one or more carriers. For each carrier allocated in a total of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.). These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell), and the secondary component carriers may be referred to as secondary cells (SCells).

[0039] Some UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 may use DL / UL WWAN spectrum. D2D communication link 158 may use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be achieved through a wide variety of wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0040] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 via a communication link 154, for example, in an unlicensed spectrum of 5 GHz. When communicating in unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0041] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) used by Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can enhance access network coverage and / or increase access network capacity.

[0042] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc., based on frequency / wavelength. In 5G NR, two initial operating bands have been designated as frequency ranges FR1 (410MHz–7.125GHz) and FR2 (24.25GHz–52.6GHz). The frequencies between FR1 and FR2 are generally referred to as the mid-band frequencies. Although a portion of FR1 is greater than 6GHz, FR1 is often (interchangeably) referred to as the “sub-6GHz” band in various documents and articles. Similar naming issues sometimes arise regarding FR2; although different from the Very High Frequency (EHF) band (30GHz–300GHz) designated as the “millimeter wave” band by the International Telecommunication Union (ITU), FR2 is often (interchangeably) referred to as the “millimeter wave” band in various documents and articles.

[0043] In light of the foregoing, unless otherwise stated, it should be understood that, as used herein, the term "sub-6GHz" and the like can broadly refer to frequencies less than 6GHz, within FR1, or including intermediate frequency band frequencies. Furthermore, unless otherwise stated, it should be understood that, as used herein, the term "millimeter wave" and the like can broadly refer to frequencies that can include intermediate frequency band frequencies, within FR2, or within the EHF band.

[0044] Whether it is a small cell 102' or a large cell (e.g., a macro base station), base station 102 may include and / or be referred to as an eNB, gB node (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in conventional sub-6 GHz spectrum, millimeter wave frequencies, and / or near-millimeter wave frequencies to communicate with UE 104. When gNB 180 operates in millimeter wave frequencies 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] Base station 180 may transmit beamformed signals to UE 104 in one or more transmission directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more reception directions 182'. UE 104 may also transmit beamformed signals to base station 180 in one or more transmission directions. Base station 180 may receive beamformed signals from UE 104 in one or more reception directions. Base station 180 / UE 104 may perform beam training to determine the optimal reception and transmission directions for each of base station 180 / UE 104. The transmission and reception directions of base station 180 may be the same or different. The transmission and reception directions of UE 104 may be the same or different.

[0046] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, MBMS Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 may communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 provides functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS traffic to base station 102 within a Broadcast-Specific Service Single Frequency Network (MBSFN) area, and can be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0047] The core network 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196. AMF 192 is the control node that handles signaling between UE 104 and the core network 190. Generally, AMF 192 provides Quality of Service (QoS) streaming and session management. All user IP packets are delivered via UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 connects to IP services 197. IP services 197 may include the Internet, intranet, IMS, packet switching (PS) streaming services, and / or other IP services.

[0048] Base stations may include and / or be referred to as gNB, B-node, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit / receive point (TRP), or some other suitable term. Base station 102 provides UE 104 with access to EPC 160 or core network 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop devices, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional devices. Some UE 104 may be referred to as IoT devices (e.g., parking timers, oil pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, radio terminal, remote terminal, handheld device, user agent, mobile client, client, or some other suitable term.

[0049] Refer again Figure 1 In some aspects, UE 104 may include a measurement gap component 198 configured to: receive data from a first base station; perform measurements on downlink signals from a second base station based on a measurement configuration; and transmit a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0050] While this disclosure may focus on 5G NR, the concepts and aspects described herein are applicable to other similar fields, such as LTE, LTE-A Advanced, Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), or other wireless / radio access technologies.

[0051] Figure 2A This is a diagram 200 illustrating an example of the first subframe within the 5G NR frame structure. Figure 2B Figure 230 is an example illustrating the DL channel within a 5G NR subframe. Figure 2C This is a diagram 250 illustrating an example of the second subframe within the 5G NR frame structure. Figure 2DFigure 280 illustrates an example of the UL channel within a 5G NR subframe. The 5G NR frame structure can be Frequency Division Duplex (FDD), where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to either DL or UL; or it can be Time Division Duplex (TDD), where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to both DL and UL. Figure 2A , Figure 2C In the provided example, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and F is provided for flexible use between DL and 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 all UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured to have a slot format via the received Slot Format Indicator (SFI) (dynamically configured via DL Control Information (DCI) or semi-statically / statically configured via Radio Resource Control (RRC) signaling). Note that the following description also applies to 5G NR frame structures for TDD.

[0052] Other wireless communication technologies may have different frame structures and / or different channels. A frame (e.g., a 10-millisecond (ms) frame) can be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. Subframes may also include mini-time slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, while for time slot configuration 1, each time slot may include 7 symbols. Symbols on the DL may be Cyclic Prefix (CP) Orthogonal Frequency Division Multiplexing (OFDM) (CP-OFDM) symbols. Symbols on the UL may be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) Extended OFDM (DFT-s-OFDM) symbols (also known as Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-constrained scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ of 0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Correspondingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 symbols per subframe. μ Each time slot. The subcarrier spacing and symbol length / duration vary depending on the design parameters. The subcarrier spacing can be equal to 2. μ*15 kHz, where μ is the parameter design from 0 to 4. Thus, parameter design μ = 0 has a subcarrier spacing of 15 kHz, while parameter design μ = 4 has a subcarrier spacing of 240 kHz. Symbol length / duration is inversely correlated with subcarrier spacing. Figures 2A to 2D An example is provided with a slot configuration of 0 (14 symbols per slot) and a parameter design of μ=2 (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 the frame set, there may be one or more different bandwidth portions (BWPs) that are frequency-division multiplexed (see [link to relevant documentation]). Figure 2B Each BWP can have specific parameter designs.

[0053] A resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) extending 12 consecutive subcarriers (also known as a physical RB (PRB)). The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0054] like Figure 2A As explained in the text, some REs carry reference (pilot) signals (RS) for the UE. RS may include demodulated RS (DM-RS) for channel estimation at the UE (indicated as R for a particular configuration). x (where 100x is the port number, but other DM-RS configurations are possible) and Channel State Information Reference Signal (CSI-RS). RS may also include Beam Measurement RS (BRS), Beam Refinement RS (BRRS), and Phase Tracking RS (PT-RS).

[0055] Figure 2BExamples of various DL channels within a subframe of a frame are explained. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising 9 RE Groups (REGs), each REG comprising 4 consecutive REs in OFDM symbols. The PDCCH within a BWP can be referred to as a Control Resource Set (CORESET). Additional BWPs can be located at higher and / or lower frequencies spanning the channel bandwidth. The Primary Synchronization Signal (PSS) is located within symbol 2 of a specific subframe of the frame. The PSS is used by the UE 104 to determine subframe / symbol timing and physical layer identity. The Secondary Synchronization Signal (SSS) is located within symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the Physical Layer Cell Identity Group Number and radio frame timing. Based on the Physical Layer Identity and 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 aforementioned DM-RS. The Physical Broadcast Channel (PBCH), carrying the Master Information Block (MIB), can logically group with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block (also known as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the System Frame Number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (such as the System Information Block (SIB)), and paging messages.

[0056] As in Figure 2C As explained, some REs carry DM-RS for channel estimation at the base station (indicated as R for a specific configuration, but other DM-RS configurations are possible). 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 or first two symbols of the PUSCH. The PUCCH DM-RS can be transmitted in different configurations depending on whether a short or long PUCCH is being transmitted and on the specific PUCCH format used. The UE can transmit a probe reference signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the combs. The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0057] Figure 2DExamples of various UL channels within a subframe of a frame are explained. The PUCCH can be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgment (ACK) / negative acknowledgment (NACK) feedback. The PUCCH carries data and may additionally be used to carry buffer status reports (BSR), power clearance reports (PHR), and / or UCI.

[0058] Figure 3 This is a block diagram showing the communication between base station 310 and UE 350 in the access network. In the DL, IP packets from EPC 160 can be provided to controller / processor 375. Controller / processor 375 implements Layer 3 and Layer 2 functionality. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Serving Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-Radio Access Technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (cryptography, cryptographic decoding, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with upper-layer packet data unit (PDU) delivery, error correction via ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto transport blocks (TBs), demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel priority differentiation.

[0059] Transmit (TX) processor 316 and receive (RX) processor 370 implement Layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) decoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. 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 decoded and modulated symbols may then be split 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 domains, and subsequently combined 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 generate multiple spatial streams. Channel estimates from channel estimator 374 can be used to determine coding and modulation schemes and for spatial processing. The channel estimates can be derived from reference signals and / or channel condition feedback transmitted by UE 350. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0060] At UE 350, each receiver 354RX receives signals via its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides this information to the receive (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for UE 350. If there are multiple spatial streams destined for UE 350, they can be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, along with the reference signal, are recovered and demodulated by determining the signal constellation points most likely to be transmitted by base station 310. These soft decisions can be based on a channel estimate calculated by channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the original data and control signals transmitted by base station 310 over the physical channel. This data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0061] The controller / processor 359 may be associated with a memory 360 that stores program code 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 and logical channels, packet reassembly, cipher decoding, 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 ACK and / or NACK protocols to support HARQ operation.

[0062] Similar to the functionality described in conjunction with DL transmissions performed by base station 310, controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) capture, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (cryptography, cryptographic decoding, integrity protection, integrity verification); RLC layer functionality associated with upper-layer PDU delivery, error correction via ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel priority differentiation.

[0063] The channel estimate derived by the channel estimator 358 from the reference signal or feedback transmitted by the base station 310 can be used by the TX processor 368 to select an appropriate coding and modulation scheme and to facilitate spatial processing. The spatial stream generated by the TX processor 368 can be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0064] UL transmissions are processed at base station 310 in a manner similar to that described in conjunction with the receiver function at UE 350. Each receiver 318RX receives signals via its corresponding antenna 320. Each receiver 318RX recovers the information modulated onto the RF carrier and provides that information to the RX processor 370.

[0065] The controller / processor 375 may be associated with a memory 376 that stores program code 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 and logical channels, packet reassembly, cipher decoding, header decompression, and control signal processing to recover IP packets from the UE 350. 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 operation.

[0066] At least one of the TX processor 368, RX processor 356, and controller / processor 359 can be configured to perform and Figure 1 The measuring gap assembly 198 combines various aspects.

[0067] The base station can execute various RRM procedures, such as handover, RRC reconfiguration, and data scheduling, in response to information provided by the UE. For example, the base station can execute OLLA to improve the radio link with the UE in response to channel measurements performed by the UE, HARQ feedback from the UE, or other information from the UE (e.g., RLC information and upper-layer confirmation).

[0068] Regarding channel measurements, the base station may (e.g., in an RRC reconfiguration message) provide the UE with a measurement configuration that configures the UE to perform and report such measurements. For example, the measurement configuration may include one or more measurement objects indicating the frequency, time location, and subcarrier spacing of a reference signal (e.g., SSB, CSI-RS, DMRS, etc.) to be measured by the UE; a reporting configuration for each measurement object (e.g., event-triggered reporting or periodic reporting); measurement gaps indicating the time periods during which the UE can perform measurements; and other measurement criteria. Based on the measurement configuration, the UE may report intra-frequency NR measurements, inter-frequency NR measurements, or inter-RAT measurements on E-UTRA frequencies (e.g., LTE) to the base station. For example, during a configured measurement gap, a UE connected to the serving cell on one frequency and in one RAT may measure the RSRP of a configured reference signal in a neighboring cell on the same frequency, on different frequencies, or in different RATs, and the UE may report the measurement to the base station if the measurement exceeds a threshold. Based on the measurements, the base station may adapt its scheduling permission for the UE or execute other RRM procedures.

[0069] Additionally, the measurement configuration may also support MR-DC. In MR-DC, two distinct nodes or base stations (including MN and SN) can provide resources and data to the UE. One type of MR-DC is EN-DC, where MN is eNB (LTE) and SN is gNB (NR). Generally, in EN-DC, eNB / MN sends RRC messages including the measurement configuration to the UE, while gNB / SN sends data to the UE. eNB / MN can also send data to the UE. The measurement configuration configured by eNB / MN can include similar information as described above (e.g., measurement object, reporting configuration, measurement interval, and other criteria), and the UE can similarly report intra-frequency, inter-frequency, or inter-RAT measurements to eNB / MN or gNB / SN based on the measurement configuration. For example, during a configured measurement interval, a UE connected to the serving eNB and gNB in ​​the EN-DC can measure the RSRP of a configured reference signal in a neighboring cell, and the UE can report the measurement to the serving eNB or gNB if the measurement exceeds a threshold. Based on measurements, the eNB / MN or gNB / SN can be adapted to grant or enforce other RRM procedures for the UE.

[0070] Generally, a UE may not be able to simultaneously measure the target carrier frequency in a neighboring cell while transmitting or receiving on the serving cell. Therefore, to enable the UE to perform such measurements, the base station (e.g., the eNB / MN in an EN-DC) can configure measurement gaps for the UE. During a measurement gap, the UE can retune its antenna to the frequency or RAT of a neighboring cell, perform measurements in the neighboring cell, and then retun its antenna back to the serving cell. The UE can periodically repeat the measurement process during each configured measurement gap.

[0071] Figure 4 Example 400 of measurement gap 402 has been explained. When the UE receives a measurement configuration from the base station, the measurement configuration may include a measurement gap configuration indicating the measurement gap length (e.g., 1.5, 3, 3.5, 4, 5.5, 6 ms, etc.), the measurement gap repetition periodicity (e.g., 20, 40, 80, 160 ms, etc.), and other criteria. For example, Figure 4 An example is described in which the base station configures the UE to have a measurement gap length of 4ms (e.g., 4 subframes) and a measurement repetition periodicity of 40ms (e.g., occurring after every 4 frames), although different gap lengths and periodicities may be configured in other examples. During each measurement gap 402, the UE may perform RF retuning to a different frequency, RAT, or cell, perform measurements, and subsequently perform RF retuning back from that different frequency, RAT, or cell.

[0072] However, in some situations, the serving base station may still send scheduling grants to the UE while the UE is performing measurements during a configured measurement gap. For example, in EN-DC, there may be a lack of measurement gap coordination between the eNB / MN providing the measurement configuration and the gNB / SN providing the scheduling grants for data. As a result, the gNB / SN may transmit scheduling grants to the UE during the measurement gap. Since the UE cannot receive the grants (because the UE has tuned away from the gNB / SN to perform measurements during these time periods), the UE may not report HARQ feedback to the base station confirming (or not confirming) the scheduling grants. Therefore, the base station may incorrectly determine that the UE is currently in DRX mode based on the lack of HARQ feedback, and thus the base station may suppress further transmission of grants for a period of time. Generally, in DRX, the UE periodically monitors the radio channel for downlink data during the "on" duration and reduces the power of most of its circuitry during the "off" duration to conserve battery life, and therefore, the base station typically transmits data to the UE during the on duration and suppresses data transmission to the UE during the off duration to conserve resources. Accordingly, the base station may suppress the transmission of scheduling permission to the UE for a period of time based on an incorrect assumption that the UE is in the off period, even if the UE may have completed its measurements, retuned back to the serving gNB / SN, and is in the on period during that time. As a result, data transmission to the UE may be inefficiently interrupted, leading to reduced data throughput.

[0073] Figure 5Example 500 illustrates UE 502 communicating with serving base stations in the EN-DC (including eNB 504 (MN) and gNB 506 (SN)). eNB 504 and gNB 506 may be in respective serving cells A and B. eNB 504 may (e.g., via RRC signaling) provide UE 502 with a measurement configuration to perform intra-frequency, inter-frequency, or inter-RAT measurements on reference signals from neighboring base station 508 in neighboring cell C. The measurement configuration may include configured measurement timings or measurement gaps (e.g., measurement gap 402) in which UE 502 may periodically perform its measurements. At the beginning of the UE's DRX activation duration, gNB 506 may send a reference signal (e.g., CSI-RS) and scheduling permission for downlink data, uplink data, or measurement reports (e.g., CSI reports). However, due to the lack of measurement gap coordination between eNB 504 and gNB 506, gNB 506 may continue sending scheduling permission to UE 502 while the UE is performing measurements during a measurement gap. Since UE 502 does not expect to receive data while performing its measurements, the UE may not send HARQ feedback to gNB 506, causing gNB to incorrectly determine that the UE is in the DRX off period. As a result, gNB 506 may stop sending scheduling permission to the UE, resulting in a data pause at least until the UE experiences the actual DRX off period and the subsequent DRX on period.

[0074] To prevent such data interruptions in such situations, the UE can transmit a Service Request (SR) to the serving base station after performing a measurement based on the measurement configuration. The SR informs the serving base station that the UE is not in the DRX off period and that there is data to be transmitted to the base station. For example, to initiate an SR procedure, the UE can trigger a Base Request (BSR) (e.g., a regular BSR) in response to determining a decrease in the amount of data received from the serving base station after the measurement gap and / or a decrease in the amount of uplink grants received from the serving base station. To identify whether such a decrease has occurred, the UE can first determine whether it received a threshold amount of data and / or a threshold amount of uplink grants (e.g., x bytes of data and / or z number of grants) from the base station within a threshold time amount (e.g., y ms before the measurement gap) before performing the measurement, where x, y, and z are pre-configured thresholds. For example, refer to... Figure 4 and 5UE 502 can determine whether it has received at least 20KB of data (or some other threshold amount of data) or at least 3 uplink grants (or some other threshold number of grants) from gNB 506 (or eNB 504) in the last 5ms (or some other threshold amount of time) before a measurement gap 402. If so, the UE can then determine whether it has tuned to a different frequency, RAT, or cell (relative to the frequency, RAT, or cell of the serving base station) to perform measurements during the measurement gap. For example, refer to Figure 4 and 5 UE502 can determine from the measurement configuration whether the UE measured the RSRP of the SSB, CSI-RS, or some other downlink signal of the neighboring base station 508 during the same measurement gap 402. If so, the UE can determine whether, after performing the measurement, it did not receive another threshold amount of data and / or another threshold amount of uplink permission (e.g., a bytes of data and / or c number of permissions) from the base station within another threshold time amount (e.g., bms after the measurement gap), where a, b, and c are pre-configured thresholds and can be the same as or different from x, y, and z, respectively. For example, refer to Figure 4 and 5 UE 502 can determine whether it has not received at least 20KB of data (or some other threshold amount of data) or at least 3 uplink grants (or some other threshold number of grants) from eNB 504 or gNB 506 in the last 5ms (or some other threshold amount of time) after measurement gap 402. If so, the UE can determine that a reduction in received data or received grants has occurred since the measurement gap, and the UE can transmit an SR accordingly to prevent the serving base station from incorrectly determining that the UE is in the DRX off period.

[0075] For example, if the UE has not received uplink permission for data transmission after a measurement interval, the UE can trigger a regular BSR and initiate an SR procedure. For instance, the UE can periodically transmit an SR on the PUCCH a configured number of times until it receives uplink permission from the serving base station (e.g., eNB 504 or gNB 506). In response, the UE can transmit a BSR (e.g., in MAC-CE). As a result of the SR (or BSR), the serving base station can determine that the UE is not in DRX mode or that DRX has been disabled for a certain period, and the UE can thus decode the scheduling permission and data, preventing data interruptions and improving data throughput.

[0076] Figure 6 Example 600 illustrates the call flow between UE 602 and base stations 604, 606, and 608. (Refer to...) Figure 5UE 602 may correspond to UE 502, base station 604 may correspond to eNB 504 in serving cell A, base station 606 may correspond to gNB 506 in serving cell B, and base station 608 may correspond to neighbor base station 508 in neighboring cell C. Alternatively, in some cases, base station 604 may correspond to gNB 506 in serving cell B, and base station 606 may correspond to eNB 504 in serving cell A. UE 602 may initially receive measurement configuration 610 from base station 604, which configures the UE to perform measurements on downlink signal 612 from base station 608. Measurement configuration 610 may also include measurement gap 613, which indicates the time period during which the UE will perform measurements (e.g., measurement gap 402). Subsequently, the UE may receive data 614 and uplink permission 615 from base station 606, as well as reference signals (e.g., CSI-RS) and scheduling permission for downlink data and CSI reports. Although not shown, the UE may similarly receive data 614 and uplink permission 615 from base station 604.

[0077] Next, at 616, the UE can determine whether it has received a threshold amount of data (e.g., data 614) or a threshold amount of uplink grants (e.g., uplink grant 615) from the serving base station within a threshold time period. For example, UE 602 can determine whether it has received at least 20KB of data (or some other amount) or at least 3 uplink grants (or some other amount) from base station 606 (or base station 604) in the last 5ms (or some other number) before measurement gap 613. Subsequently, at 618, the UE can perform measurements on downlink signals from neighboring base stations based on measurement configuration. For example, UE 602 can measure the RSRP, Reference Signal Received Quality (RSRQ), or Signal-to-Noise Ratio (SNR) of downlink signals 612 (e.g., SSB, CSI-RS, DMRS, etc.) from base station 608 during measurement gap 613 as configured in measurement configuration 610. After performing the measurement, at point 620, the UE may determine that it has not received another threshold amount of data or another threshold amount of uplink grants from the serving base station within another threshold time period. For example, UE 602 may determine that in the last 5 ms (or some other number) after the measurement gap 613, it has not received at least 20 KB of data (or some other number) or at least 3 uplink grants (or some other number) from base station 606 (or base station 604). For example, as Figure 6 As explained in the text, the UE can determine that it did not receive data or uplink permission from base station 606 or 604 after performing a measurement at 618.

[0078] Accordingly, at 622, the UE can identify a reduction in the amount of downlink data or uplink permission received from the serving base station based on the determinations at 616 and 620, and therefore the UE can transmit a scheduling request 624 to base station 606 (or base station 604) to inform the serving base station that the UE has data available for transmission. As a result, base station 606 (or 604) can send an uplink permission 626 to UE 602 including the configured resources for uplink transmission, and the UE can subsequently send a BSR 628 to the corresponding base station in the configured resources. This avoids a degradation in data throughput. Additionally, although... Figure 6 The example illustrates performing the determination at 616 before the measurement at 618, but in other examples, the UE may perform the determination at 616 after performing the measurement at 618.

[0079] In addition, although Figure 6 An example was explained in which the UE transmits an SR in response to a decrease in the amount of downlink data received or the amount of uplink permission granted. However, the UE may alternatively transmit an SR in response to a decrease in both the amount of data received and the amount of uplink permission granted. In this case, the UE may perform the determinations at 616 and 620 separately for each quantity (i.e., data and uplink permission) based on the same or different threshold amounts of data, uplink permission, or time. For example, the UE may transmit an SR in response to an indication that at least 20KB of data (or some other amount) has not been received from base station 606 (or base station 604) in the last 5ms (or some other number) after measurement gap 613, and in response to a further indication that at least 3 uplink permission grants have not been received from base station 606 (or base station 604) in the last 5ms (or some other number) after measurement gap 613. Thus, an SR may be transmitted in response to a decrease in downlink data received, a decrease in uplink permission received, or a combination of both.

[0080] Figure 7 This is a flowchart 700 of a wireless communication method. This method can be performed by a UE (e.g., UE 104, 350, 502, 602; device 802). Optional aspects are illustrated with dashed lines. This method allows the UE to trigger the initiation of an SR procedure in response to a decrease in at least one of the amount of downlink data received after a measurement gap or the amount of uplink data permitted, to avoid inefficient data interruptions caused by erroneous DRX determination by the base station.

[0081] At point 702, the UE receives data from the first base station. For example, point 702 can be performed by data component 840. For example, refer to... Figure 6UE 602 can receive data 614 from base station 606. UEs 350 and 602 can receive data 614 from base stations 310 and 606, for example, according to the following example procedure: the UE can acquire data using one or more antennas 352, the UE can demodulate the acquired data (e.g., in RX processor 356), and the UE can decode the demodulated data (e.g., in controller / processor 359). The UE can also store the decoded data in memory 360.

[0082] At point 704, the UE can determine, before performing a measurement on the downlink signal from the second base station, that it has received a threshold amount of data from the first base station within a threshold time length. Alternatively or additionally, the UE can determine, at point 704, that it has received a threshold number of uplink grants from the first base station within the threshold time length before performing the measurement. Thus, at point 704, the UE can determine, before performing the measurement, at least one of receiving a threshold amount of data or a threshold number of uplink grants from the first base station within the threshold time length. For example, point 704 can be performed by a first determining component 842. For example, see reference... Figure 6 Before performing a measurement on the downlink signal 612 from base station 608 at 618, UE 602 may determine at 616 the threshold amount of data (such as x bytes of data) and / or the threshold number of uplink grants (such as z grants) received from base station 606 within a threshold time length (such as y ms before measurement interval 613). The thresholds x and z may be the same or different from each other. In the example process of making the determination at 616, UE 602 (e.g., controller / processor 359 of UE 350) may count the number of bytes of data received from base station 606 and / or the number of uplink grants received from base station 606 within a configured (threshold) time period y ms (before measuring downlink signal 612). The UE may compare the counted number of bytes and / or the number of uplink grants with a threshold amount of data (x bytes) and / or a threshold number of uplink grants (z grants), respectively, and the UE may identify that the counted number of bytes and / or the number of uplink grants at least satisfy the threshold amount of data and / or the threshold number of uplink grants, respectively (e.g., the counted number of bytes is at least x bytes and / or the counted number of grants is at least z grants).

[0083] At point 706, the UE performs measurements on the downlink signal from the second base station based on the measurement configuration. For example, 706 can be performed by measurement component 844. For example, refer to... Figure 6UE 602 can perform measurements on downlink signal 612 from base station 608 at 618. In an example of performing measurements at 618, the UE (e.g., the controller / processor 359 of UE 350) can receive downlink signals from base station 608 (e.g., using one or more antennas 352 and subsequently demodulating and decoding the downlink signals), and the UE can obtain the RSRP, RSRQ, or SNR of downlink signal 612. Furthermore, measurements can be performed at 618 based on measurement configuration 610. For example, the measurement configuration may include one or more measurement objects indicating the frequency, time position, and subcarrier spacing of reference signals (e.g., downlink signal 612) (e.g., SSB, CSI-RS, DMRS, etc.) from base station 608 to be measured by the UE, and the UE can perform measurements on the reference signals indicated in the configured measurement objects. The measurement configuration can be obtained from a first base station (e.g., such as...). Figure 6 The base station 604 described herein is a third base station in dual connectivity. Alternatively, in another example, the measurement configuration may be received from a first base station (e.g., base station 606). Furthermore, the measurement configuration may indicate a measurement gap (e.g., measurement gap 613), and a measurement may be performed at 618 during the measurement gap. For example, the UE may measure the reference signals indicated in the configured measurement objects during the measurement gap 402 indicated in the measurement configuration.

[0084] At 708, the UE may determine, after performing the measurement, that no data of another threshold amount has been received from the first base station within another threshold time length. Alternatively or additionally, the UE may determine at 708, after performing the measurement, that no uplink permission of another threshold number has been received from the first base station within another threshold time length. Thus, at 708, the UE may determine, after performing the measurement, that at least one of the following has not been received from the first base station within another threshold time length: no data of another threshold amount or no uplink permission of another threshold number. For example, 708 may be performed by a second determining component 846. The other threshold time amount may be the same as or different from the threshold time amount referenced at 704, the other threshold number of uplink permission may be the same as or different from the other threshold number of uplink permission referenced at 704, and the other threshold time length may be the same as or different from the threshold time length referenced at 704. For example, refer to Figure 6After performing a measurement at 618, UE 602 may determine at 620 that it has not received another threshold amount of data (such as a bytes of data) or another threshold number of uplink grants (such as c uplink grants) from base station 606 within another threshold time length (such as b ms after measurement gap 613). In the example process of making the determination at 620, UE 602 (e.g., controller / processor 359 of UE 350) may count the number of data bytes received from base station 606 and / or the number of uplink permissions received from base station 606 within a configured (threshold) time period b ms (after measuring downlink signal 612). The UE may compare the counted number of bytes and / or the number of uplink permissions with a threshold amount of data (a bytes) and / or a threshold number of uplink permissions (c permissions), respectively, and the UE may identify that the counted number of bytes and / or the number of uplink permissions does not meet the threshold amount of data and / or the threshold number of uplink permissions, respectively (e.g., the counted number of bytes is less than a bytes and / or the counted number of permissions is less than c permissions). Thresholds a and c may be the same or different from each other, thresholds a and x may be the same or different from each other, thresholds c and z may be the same or different from each other, and thresholds b and y may be the same or different from each other.

[0085] At 710, the UE can identify a reduction in the amount of downlink data received based on the determinations at 704 and 708. Alternatively or additionally, the UE can identify a reduction in the amount of uplink data transmission permissions received based on the determinations at 704 and 708 at 710. Thus, at 710, the UE can identify a reduction in at least one of the amount of downlink data received or the number of uplink data transmission permissions received based on the determinations at 704 and 708. For example, 710 can be performed by the identification component 848. For example, refer to... Figure 6UE 602 may identify a reduction in the amount of downlink data received since measurement gap 613 at 622 based on the determinations at 616 and 620. Alternatively or additionally, UE 602 may identify a reduction in the amount of uplink data permitted for transmission received since measurement gap 613 at 622 based on the determinations at 616 and 620. In the example process of making the identification at 622, the UE (e.g., the controller / processor 359 of the UE) may determine at 616, as described above, that the counted number of bytes received before the measurement gap and / or the counted number of uplink permissions received at least meet the data threshold and / or the uplink permission threshold, and the UE may determine at 620, as described above, that another counted number of bytes received after the measurement gap and / or another counted number of uplink permissions received at least do not meet the data threshold and / or the uplink permission threshold, and the UE may determine, in response to these two determinations, that a reduction has occurred.

[0086] At 712, the UE transmits a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement was performed at 706 or the number of permissions received for transmitting uplink data. For example, 712 may be performed by scheduling request component 850. The reduction may be the reduction identified at 710. For example, refer to... Figure 6 UE 602 may transmit a scheduling request 624 to base station 606 in response to a reduction flag at 622 and after performing a measurement at 618. The scheduling request may be transmitted if no permission is received after performing a measurement at 706. For example, if UE 602 does not receive uplink permission from base station 606 after a measurement gap 613, the UE may transmit scheduling request 624. UEs 350 and 602 may transmit the scheduling request to base stations 310 and 606, for example, according to the following example procedure: the UE may encode the scheduling request (e.g., in controller / processor 359), the UE may modulate the encoded scheduling request (e.g., in TX processor 368), and the UE may use one or more antennas 352 to transmit the modulated and encoded scheduling request.

[0087] The scheduling request can also be transmitted at 712 in response to triggering a BSR. For example, refer to Figure 6 The UE may trigger a BSR in response to a reduction in flags at 710 (and 622), after which the UE transmits a scheduling request 624 at 712. Furthermore, after transmitting the scheduling request, at 714, the UE may receive uplink permission in response to the scheduling request, and at 716, the UE may transmit a BSR in response to the uplink permission. For example, 714 may be performed by uplink permission component 852, and 716 may be performed by BSR component 854. For example, see reference... Figure 6UE 602 may receive uplink grant 626 in response to scheduling request 624, and UE may transmit BSR 628 in response to uplink grant 626. UEs 350 and 602 may receive uplink grant from base stations 310 and 606, for example, according to the following example procedure: the UE may obtain the grant using one or more antennas 352, the UE may demodulate the obtained grant (e.g., in RX processor 356), and the UE may decode the demodulated grant (e.g., in controller / processor 359). The UE may also store the decoded grant in memory 360. Furthermore, UEs 350 and 602 may transmit BSR to base stations 310 and 606, for example, according to the following example procedure: the UE may encode the BSR (e.g., in controller / processor 359), the UE may modulate the encoded BSR (e.g., in TX processor 368), and the UE may use one or more antennas 352 to transmit the modulated and encoded BSR.

[0088] In one example, the second base station can be a different RAT than the first base station. For example, refer to Figure 6 Base station 608 can be an eNB, while base station 606 can be a gNB. In another example, downlink signals from the second base station can be received at a different frequency than data received from the first base station. For example, refer to... Figure 6 The downlink signal 612 from base station 608 can be received at a different frequency than the data 614 from base station 606. In a further example, the second base station can be in a different cell than the first base station. For example, refer to Figure 6 Base station 608 can be connected with base station 606 (e.g., Figure 5 In cell B of the gNB 506) different cells (e.g., Figure 5 (Neighboring base station 508 in cell C).

[0089] Figure 8Figure 800 illustrates an example of the hardware implementation of device 802. Device 802 is a UE and includes a cellular baseband processor 804 (also referred to as a modem) coupled to a cellular RF transceiver 822 and one or more Subscriber Identity Module (SIM) cards 820, an application processor 806 coupled to a Secure Digital Card (SD) card 808 and a screen 810, a Bluetooth module 812, a Wireless Local Area Network (WLAN) module 814, a Global Positioning System (GPS) module 816, and a power supply 818. The cellular baseband processor 804 communicates with the UE 104 and / or BS 102 / 180 via the cellular RF transceiver 822. The cellular baseband processor 804 may include computer-readable media / memory. The computer-readable media / memory may be non-transient. The cellular baseband processor 804 is responsible for general processing, including the execution of software stored on the computer-readable media / memory. This software, when executed by the cellular baseband processor 804, causes the cellular baseband processor 804 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the cellular baseband processor 804 during software execution. The cellular baseband processor 804 further includes a receiving component 830, a communication manager 832, and a transmission component 834. The communication manager 832 includes one or more of the described components. The components within the communication manager 832 can be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 804. The cellular baseband processor 804 can be a component of the UE 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 802 may be a modem chip and include only the baseband processor 804, and in another configuration, the device 802 may be the entire UE (e.g., see...). Figure 3 (350) and includes the aforementioned additional modules of device 802.

[0090] Communication manager 832 includes a data component 840 configured to receive data from a first base station, for example, as described in conjunction with 702. Communication manager 832 further includes a first determining component 842, which receives input in data form from data component 840 and is configured to: determine, before performing a measurement, that at least one of a threshold amount of data or a threshold number of uplink permissions has been received from the first base station within a threshold time length, for example, as described in conjunction with 704. Communication manager 832 further includes a measurement component 844 configured to perform measurements on downlink signals from a second base station based on a measurement configuration, for example, as described in conjunction with 706. Communication manager 832 further includes a second determining component 846, which receives input in data form from data component 840 and is configured to: determine, after performing a measurement, that at least one of another threshold amount of data or another threshold number of uplink permissions has not been received from the first base station within another threshold time length, for example, as described in conjunction with 708. The communication manager 832 further includes an identification component 848 that receives input in the form of determinations from a first determination component 842 and a second determination component 846 and is configured to: identify a reduction in at least one of the amount of downlink data received or the number of permissions received for transmitting uplink data, based on these determinations, for example, as described in conjunction with 710. The communication manager 832 further includes a scheduling request component 850 that receives input in the form of data from a data component 840, receives measurements from a measurement component 844, and receives identifications from the identification component 848, and is configured to: transmit a scheduling request in response to a reduction in at least one of the amount of downlink data received or the number of permissions received for transmitting uplink data, for example, as described in conjunction with 712. The communication manager 832 further includes an uplink permission component 852, which is configured to receive uplink permissions in response to the scheduling request, for example, as described in conjunction with 714. The communication manager 832 further includes a BSR component 854, which receives uplink grant input from the uplink grant component 852 and is configured to transmit a BSR in response to an uplink grant, for example, as described in conjunction with 716.

[0091] The device may include execution Figure 6 and 7 The additional components of each block of the algorithm in the aforementioned flowchart. Therefore, Figure 6 and 7Each block in the aforementioned flowchart may be executed by a component, and the device may include one or more of these components. These components may be one or more hardware components specifically configured to execute the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0092] In one configuration, device 802 (and in particular cellular baseband processor 804) includes: means for receiving data from a first base station; means for performing measurements on downlink signals from a second base station based on a measurement configuration; and means for transmitting a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0093] In one configuration, the measurement configuration may be received from a first base station or a third base station that is in dual connectivity with the first base station.

[0094] In one configuration, a scheduling request may be sent if no permission is received after the measurement is performed.

[0095] In one configuration, a scheduling request may be transmitted in response to triggering a BSR. In another configuration, the receiving means may be further configured to receive uplink permission in response to a scheduling request, and the transmitting means may be further configured to transmit a BSR in response to uplink permission.

[0096] In one configuration, the measurement configuration may indicate a measurement gap, and the measurement may be performed during that measurement gap.

[0097] In one configuration, the second base station may be a different RAT than the first base station. In one configuration, downlink signals from the second base station may be received on a different frequency than data received from the first base station. In one configuration, the second base station may be in a different cell than the first base station.

[0098] In one configuration, device 802 (and in particular cellular baseband processor 804) may include means for determining, before performing a measurement, that at least one of a threshold amount of data or a threshold number of uplink permissions has been received from a first base station within a threshold time length. The means for determining may be further configured to determine, after performing the measurement, that at least one of another threshold amount of data or another threshold number of uplink permissions has not been received from the first base station within another threshold time length. Device 802 (and in particular cellular baseband processor 804) may also include means for identifying a reduction in at least one of the amount of downlink data received or the number of permissions received for transmitting uplink data based on these determinations.

[0099] The aforementioned apparatus may be one or more of the aforementioned components in device 802 configured to perform the functions described by the aforementioned apparatus. As described above, device 802 may include TX processor 368, RX processor 356, and controller / processor 359. Thus, in one configuration, the aforementioned apparatus may be TX processor 368, RX processor 356, and controller / processor 359 configured to perform the functions described by the aforementioned apparatus.

[0100] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowcharts is an explanation of exemplary methods. It should be understood that the specific order or hierarchy of the boxes in these process / flowcharts can be rearranged based on design preferences. Furthermore, some boxes may be combined or omitted. The appended method claims present the elements of the various boxes in an exemplary order and are not intended to be limited to the specific order or hierarchy presented.

[0101] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will readily be understood by those skilled in the art, and the universal principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but are to be granted the full scope consistent with the language of the claims, wherein references to the singular form of an element, unless specifically stated otherwise, are not intended to mean “one and only one,” but rather “one or more.” Terms such as “if,” “when,” and “at the time of” should be interpreted as meaning “under this condition,” rather than implying a direct temporal relationship or reaction. That is, these phrases (e.g., “when”) do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but only imply that an action will occur when a condition is met, without requiring a specific or immediate temporal constraint for the action to occur. The term “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as superior to or overriding other aspects. Unless specifically stated otherwise, the term “some / a” refers to one or more. Combinations 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, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations 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, and C", and "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. Elements of all aspects described throughout this disclosure that are presently or hereafter known to those skilled in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended as a donation to the public, whether or not such disclosure is expressly stated in the claims. The terms “module,” “mechanism,” “element,” and “device” are not necessarily substitutes for the term “apparatus.” Thus, no claim element should be interpreted as an apparatus plus a function unless the element is explicitly stated using the phrase “apparatus for…”.

[0102] The following examples are merely illustrative and can be combined with other embodiments or aspects of the teachings described herein without limitation.

[0103] Example 1 is a method for wireless communication at a UE, comprising: receiving data from a first base station; performing a measurement on a downlink signal from a second base station based on a measurement configuration; and transmitting a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0104] Example 2 is the method of Example 1, wherein the measurement configuration is received from a first base station or a third base station that is in dual connectivity with the first base station.

[0105] Example 3 is a method of either Example 1 or 2, wherein the scheduling request is transmitted if no permission is received after the measurement is performed.

[0106] Example 4 is a method of any of Examples 1 to 3, wherein the scheduling request is transmitted in response to triggering a BSR.

[0107] Example 5 is the method of Example 4, further comprising: receiving uplink permission in response to the scheduling request; and transmitting the BSR in response to the uplink permission.

[0108] Example 6 is a method of any of Examples 1 to 5, wherein the measurement configuration indicates a measurement gap, and wherein the measurement is performed during the measurement gap.

[0109] Example 7 is a method of any of Examples 1 to 6, wherein the second base station is a different RAT than the first base station.

[0110] Example 8 is a method of any of Examples 1 to 7, wherein the downlink signal from the second base station is received at a different frequency than the data received from the first base station.

[0111] Example 9 is a method of any of Examples 1 to 8, wherein the second base station is in a different cell than the first base station.

[0112] Example 10 is a method of any of Examples 1 to 9, further comprising: determining, before performing the measurement, that at least one of receiving a threshold amount of data or a threshold number of uplink permissions from a first base station within a threshold time length; determining, after performing the measurement, that at least one of not receiving another threshold amount of data or another threshold number of uplink permissions from the first base station within another threshold time length; and identifying, based on these determinations, a reduction in the amount of downlink data received or the number of permissions received for transmitting uplink data.

[0113] Example 11 is an apparatus for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive data from a first base station; perform a measurement on a downlink signal from a second base station based on a measurement configuration; and transmit a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0114] Example 12 is an apparatus of Example 11, wherein the measurement configuration is received from a first base station or a third base station that is in dual connectivity with the first base station.

[0115] Example 13 is an apparatus of either Example 11 or 12, wherein the scheduling request is transmitted if no permission is received after the measurement is performed.

[0116] Example 14 is an apparatus of any of Examples 11 to 13, wherein the scheduling request is transmitted in response to triggering a BSR.

[0117] Example 15 is an apparatus of Example 14, wherein the instructions, when executed by the processor, further cause the apparatus to: receive uplink permission in response to the scheduling request; and transmit the BSR in response to the uplink permission.

[0118] Example 16 is an apparatus of any of Examples 11 to 15, wherein the measurement configuration indicates a measurement gap, and wherein the measurement is performed during the measurement gap.

[0119] Example 17 is an apparatus of any of Examples 11 to 16, wherein the second base station is a RAT different from the first base station.

[0120] Example 18 is an apparatus of any of Examples 11 to 17, wherein the downlink signal from the second base station is received at a different frequency than the data received from the first base station.

[0121] Example 19 is an apparatus of any of Examples 11 to 18, wherein the second base station is in a different cell than the first base station.

[0122] Example 20 is an apparatus of any of Examples 11 to 19, wherein, when executed by the processor, the apparatus further causes the apparatus to: determine, before performing the measurement, that at least one of a threshold amount of data or a threshold number of uplink permissions has been received from the first base station within a threshold time length; determine, after performing the measurement, that at least one of another threshold amount of data or another threshold number of uplink permissions has not been received from the first base station within another threshold time length; and identify, based on these determinations, a reduction in the amount of downlink data received or the number of permissions received for transmitting uplink data.

[0123] Example 21 is an apparatus for wireless communication, comprising: means for receiving data from a first base station; means for performing a measurement on a downlink signal from a second base station based on a measurement configuration; and means for transmitting a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

[0124] Example 22 is the device of Example 21, wherein the measurement configuration is received from a first base station or a third base station that is in dual connectivity with the first base station.

[0125] Example 23 is a device of either Example 21 or 22, wherein the scheduling request is transmitted if no permission is received after the measurement is performed.

[0126] Example 24 is a device of any of Examples 21 to 23, wherein the scheduling request is transmitted in response to triggering a BSR.

[0127] Example 25 is the device of Example 24, wherein the means for receiving is further configured to receive uplink permission in response to the scheduling request; and wherein the means for transmitting is further configured to transmit the BSR in response to the uplink permission.

[0128] Example 26 is a device of any of Examples 21 to 25, wherein the measurement configuration indicates a measurement gap, and wherein the measurement is performed during the measurement gap.

[0129] Example 27 is a device of any of Examples 21 to 26, wherein the second base station is a different RAT from the first base station.

[0130] Example 28 is a device of any of Examples 21 to 27, wherein the downlink signal from the second base station is received at a different frequency than the data received from the first base station.

[0131] Example 29 is a device of any of Examples 21 to 28, wherein the second base station is in a different cell than the first base station.

[0132] Example 30 is an apparatus of any of Examples 21 to 29, further comprising: means for determining, prior to performing the measurement, at least one of receiving a threshold amount of data or a threshold number of uplink permissions from a first base station within a threshold time length; wherein the means for determining is further configured to: determine, after performing the measurement, at least one of not receiving another threshold amount of data or another threshold number of uplink permissions from the first base station within another threshold time length; and means for identifying, based on these determinations, a reduction in the amount of downlink data received or the number of permissions received for transmitting uplink data.

[0133] Example 31 is a computer-readable medium storing computer-executable code that, when executed by a processor, causes the processor to: receive data from a first base station; perform measurements on downlink signals from a second base station based on a measurement configuration; and transmit a scheduling request in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

Claims

1. A method for conducting wireless communication at a user equipment (UE), comprising: Receive data from the first base station; During the discontinuous reception (DRX) activation period, measurements are performed on downlink signals from the second base station based on the measurement configuration; Before performing the measurement, determine at least one of receiving a threshold amount of data or a threshold number of uplink permissions from the first base station within a threshold time length; After performing the measurement, it is determined that at least one of the following is not received from the first base station within another threshold time length: another threshold amount of data or another threshold number of uplink permissions. The reduction of at least one of the amount of downlink data received or the number of permissions granted for transmitting uplink data is identified based on the determination made before the measurement is performed and the determination made after the measurement is performed. as well as During the DRX activation period, a scheduling request is transmitted in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of uplink data transmission permissions received.

2. The method as described in claim 1, wherein, The measurement configuration is received from the first base station or a third base station that is in dual connectivity with the first base station.

3. The method as described in claim 1, wherein, The scheduling request is transmitted if no permission is received after the measurement is performed.

4. The method of claim 1, wherein, The scheduling request is transmitted in response to triggering a buffer status report (BSR).

5. The method of claim 4, further comprising: Receive uplink permission in response to the scheduling request; as well as The BSR is transmitted in response to the uplink grant.

6. The method of claim 1, wherein, The measurement configuration indicates a measurement gap, and the measurement is performed during the measurement gap.

7. The method of claim 1, wherein, The second base station uses a different radio access technology (RAT) than the first base station.

8. The method of claim 1, wherein, The downlink signal from the second base station is received at a different frequency than the data received from the first base station.

9. The method of claim 1, wherein, The second base station is located in a different cell than the first base station.

10. An apparatus for wireless communication, comprising: One or more processors; One or more memories, each coupled to at least one of the one or more processors; as well as Instructions, individually or in combination, stored in the one or more memories and operable, when executed individually or in combination by the processor, to cause the means to: Receive data from the first base station; During the discontinuous reception (DRX) activation period, measurements are performed on downlink signals from the second base station based on the measurement configuration; Before performing the measurement, determine at least one of receiving a threshold amount of data or a threshold number of uplink permissions from the first base station within a threshold time length; After performing the measurement, it is determined that at least one of the following is not received from the first base station within another threshold time length: another threshold amount of data or another threshold number of uplink permissions. The reduction of at least one of the amount of downlink data received or the number of permissions granted for transmitting uplink data is identified based on the determination made before the measurement is performed and the determination made after the measurement is performed. as well as During the DRX activation period, a scheduling request is transmitted in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of uplink data transmission permissions received.

11. The apparatus of claim 10, wherein, The measurement configuration is received from the first base station or a third base station that is in dual connectivity with the first base station.

12. The apparatus of claim 10, wherein, The scheduling request is transmitted if no permission is received after the measurement is performed.

13. The apparatus of claim 10, wherein, The scheduling request is transmitted in response to triggering a buffer status report (BSR).

14. The apparatus of claim 13, wherein, When the instructions are executed individually or in combination by the one or more processors, the apparatus further causes the following: Receive uplink permission in response to the scheduling request; and The BSR is transmitted in response to the uplink grant.

15. The apparatus of claim 10, wherein, The measurement configuration indicates a measurement gap, and the measurement is performed during the measurement gap.

16. The apparatus of claim 10, wherein, The second base station uses a different radio access technology (RAT) than the first base station.

17. The apparatus of claim 10, wherein, The downlink signal from the second base station is received at a different frequency than the data received from the first base station.

18. The apparatus of claim 10, wherein, The second base station is located in a different cell than the first base station.

19. A device for wireless communication, comprising: A means for receiving data from a first base station; A means for performing measurements on downlink signals from a second base station based on a measurement configuration during the discontinuous reception (DRX) activation period; Means for determining, prior to performing the measurement, at least one of receiving a threshold amount of data or a threshold number of uplink permissions from the first base station within a threshold time length; A means for determining, after performing the measurement, that at least one of an uplink grant of a different threshold amount of data or a different threshold number of data has not been received from the first base station within a different threshold time length; A means for identifying a reduction in at least one of the amount of downlink data received or the number of permissions received for transmitting uplink data, based on the determination made before the measurement is performed and the determination made after the measurement is performed. as well as A means for transmitting a scheduling request during the DRX activation period in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of permissions received for transmitting uplink data.

20. The device as claimed in claim 19, wherein, The scheduling request is transmitted if no permission is received after the measurement is performed.

21. The device as claimed in claim 19, wherein, The scheduling request is transmitted in response to triggering a buffer status report (BSR).

22. The device as claimed in claim 21, The receiving device is further configured to receive uplink permission in response to the scheduling request; and The means for transmission is further configured to transmit the BSR in response to the uplink grant.

23. The device as claimed in claim 19, wherein, The measurement configuration indicates a measurement gap, and the measurement is performed during the measurement gap.

24. The device as claimed in claim 19, wherein, The second base station uses a different radio access technology (RAT) than the first base station.

25. The device as claimed in claim 19, wherein, The downlink signal from the second base station is received at a different frequency than the data received from the first base station.

26. The device as claimed in claim 19, wherein, The second base station is located in a different cell than the first base station.

27. One or more non-transitory computer-readable media comprising computer-executable code, said code, when executed by one or more processors, causing said one or more processors individually or in combination to: Receive data from the first base station; During the discontinuous reception (DRX) activation period, measurements are performed on downlink signals from the second base station based on the measurement configuration; Before performing the measurement, determine at least one of receiving a threshold amount of data or a threshold number of uplink permissions from the first base station within a threshold time length; After performing the measurement, it is determined that at least one of the following is not received from the first base station within another threshold time length: another threshold amount of data or another threshold number of uplink permissions. The reduction of at least one of the amount of downlink data received or the number of permissions granted for transmitting uplink data is identified based on the determination made before the measurement is performed and the determination made after the measurement is performed. as well as During the DRX activation period, a scheduling request is transmitted in response to a reduction in at least one of the amount of downlink data received after the measurement is performed or the number of uplink data transmission permissions received.

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