WO2022000255A1 - Gestion autonome d'une puissance de transmission dans une petite cellule - Google Patents

Gestion autonome d'une puissance de transmission dans une petite cellule Download PDF

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Publication number
WO2022000255A1
WO2022000255A1 PCT/CN2020/099212 CN2020099212W WO2022000255A1 WO 2022000255 A1 WO2022000255 A1 WO 2022000255A1 CN 2020099212 W CN2020099212 W CN 2020099212W WO 2022000255 A1 WO2022000255 A1 WO 2022000255A1
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WIPO (PCT)
Prior art keywords
base station
path loss
threshold distance
transmit power
relative threshold
Prior art date
Application number
PCT/CN2020/099212
Other languages
English (en)
Inventor
Li Tan
Chaofeng HUI
Meng Liu
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/099212 priority Critical patent/WO2022000255A1/fr
Publication of WO2022000255A1 publication Critical patent/WO2022000255A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for managing transmit power in small cells.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc. ) .
  • available system resources e.g., bandwidth, transmit power, etc.
  • multiple-access systems examples include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, 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, to name a few.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a wireless multiple-access communication system may include a number of base stations (BSs) , which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs) .
  • BSs base stations
  • UEs user equipments
  • a set of one or more base stations may define an eNodeB (eNB) .
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs) , edge nodes (ENs) , radio heads (RHs) , smart radio heads (SRHs) , transmission reception points (TRPs) , etc.
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • SSRHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a set of one or more DUs, in communication with a CU may define an access node (e.g., which may be referred to as a BS, 5G NB, next generation NodeB (gNB or gNodeB) , transmission reception point (TRP) , etc. ) .
  • BS central nodes
  • 5G NB next generation NodeB
  • TRP transmission reception point
  • a BS or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a BS or DU to a UE) and uplink channels (e.g., for transmissions from a UE to BS or DU) .
  • downlink channels e.g., for transmissions from a BS or DU to a UE
  • uplink channels e.g., for transmissions from a UE to BS or DU
  • NR e.g., new radio or 5G
  • LTE long term evolution
  • NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP.
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL) .
  • OFDMA orthogonal frequency division multiple access
  • CP cyclic prefix
  • DL downlink
  • UL uplink
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • Certain aspects provide a method for wireless communications by a first base station.
  • the method generally includes measuring one or more reference signals transmitted by a second base station, calculating a path loss between the first base station and second base station based on the measurement, and adjusting a transmit power for one or more transmissions based on the calculated path loss.
  • the apparatus generally includes means for measuring one or more reference signals transmitted by a second base station; means for calculating a path loss between the first base station and second base station based on the measurement; and means for adjusting a transmit power for one or more transmissions based on the calculated path loss.
  • the apparatus generally includes a processing system configured to: measure one or more reference signals transmitted by a second base station; calculate a path loss between the first base station and second base station based on the measurement; and adjust a transmit power for one or more transmissions based on the calculated path loss.
  • the first base station generally includes at least one antenna; and a processing system configured to: measure, via the at least one antenna, one or more reference signals transmitted by a second base station; calculate a path loss between the first base station and second base station based on the measurement; and adjust a transmit power for one or more transmissions based on the calculated path loss.
  • Certain aspects provide a computer-readable medium for wireless communications by a first base station.
  • the computer-readable medium generally includes codes executable to measure one or more reference signals transmitted by a second base station; calculate a path loss between the first base station and second base station based on the measurement; and adjust a transmit power for one or more transmissions based on the calculated path loss.
  • Certain aspects provide means for, apparatus, and/or computer readable medium having computer executable code stored thereon, for techniques described herein for forming a virtual user equipment group and enhancing communication using joint reception and transmission mechanisms.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) , in accordance with certain aspects of the present disclosure.
  • RAN radio access network
  • FIG. 3 is a diagram illustrating an example physical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • FIG. 4 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 5 illustrates an example of a frame format for a new radio (NR) system, in accordance with certain aspects of the present disclosure.
  • NR new radio
  • FIG. 6 illustrates an example heterogeneous network, in which aspects of the present disclosure may be utilized.
  • FIG. 7 illustrates example operations for wireless communications by a network entity, in accordance with certain aspects of the present disclosure.
  • FIG. 8 illustrates an example heterogeneous network with base stations utilizing aspects of the present disclosure.
  • FIG. 9 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein, in accordance with aspects of the present disclosure.
  • a small cell e.g., pico cell or femto cell
  • a larger cell e.g., macrocell
  • a heterogeneous network including a macrocell and one or more smaller cells may, thus, benefit from reduced interference due to smaller cells near a cell center, while still providing enhanced coverage by smaller cells at the macrocell edge.
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • An OFDMA network may implement a radio technology such as NR (e.g.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • New Radio is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • New radio (NR) access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond) , massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • one or more small cell base stations such as femto cell BSs 110y or 110z and/or pico cell BS 110x may be configured to perform operations 700 of FIG. 7 to autonomously adjust transmit power relative to their location within a coverage area of a macro cell base station (e.g., BS 110c or 110b) .
  • a macro cell base station e.g., BS 110c or 110b
  • the wireless communication network 100 may include a number of base stations (BSs) 110 and other network entities.
  • a BS may be a station that communicates with user equipments (UEs) .
  • Each BS 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a NB subsystem serving this coverage area, depending on the context in which the term is used.
  • NB Node B
  • gNodeB next generation NodeB
  • NR BS next generation NodeB
  • 5G NB access point
  • AP access point
  • TRP transmission reception point
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) .
  • CSG Closed Subscriber Group
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BSs for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple (e.g., three) cells.
  • Wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • Wireless communication network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless communication network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • Wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless communication network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, a smart phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast Fourier Transfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz) , respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks) , and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • a scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and equipment within its service area or cell.
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity.
  • a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs) , and the other UEs may utilize the resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may communicate directly with one another in addition to communicating with a scheduling entity.
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a finely dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • FIG. 2 illustrates an example logical architecture of a distributed Radio Access Network (RAN) 200, which may be implemented in the wireless communication network 100 illustrated in FIG. 1.
  • a 5G access node 206 may include an access node controller (ANC) 202.
  • ANC 202 may be a central unit (CU) of the distributed RAN 200.
  • the backhaul interface to the Next Generation Core Network (NG-CN) 204 may terminate at ANC 202.
  • the backhaul interface to neighboring next generation access Nodes (NG-ANs) 210 may terminate at ANC 202.
  • ANC 202 may include one or more TRPs 208 (e.g., cells, BSs, gNBs, etc. ) .
  • TRPs 208 e.g., cells, BSs, gNBs, etc.
  • the TRPs 208 may be a distributed unit (DU) .
  • TRPs 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not illustrated) .
  • a single ANC e.g., ANC 202
  • ANC e.g., ANC 202
  • RaaS radio as a service
  • TRPs 208 may be connected to more than one ANC.
  • TRPs 208 may each include one or more antenna ports.
  • TRPs 208 may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the logical architecture of distributed RAN 200 may support fronthauling solutions across different deployment types.
  • the logical architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.
  • NG-AN next generation access node
  • the logical architecture of distributed RAN 200 may enable cooperation between and among TRPs 208, for example, within a TRP and/or across TRPs via ANC 202.
  • An inter-TRP interface may not be used.
  • Logical functions may be dynamically distributed in the logical architecture of distributed RAN 200.
  • the Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and a Physical (PHY) layers may be adaptably placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202) .
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • FIG. 3 illustrates an example physical architecture of a distributed RAN 300, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 302 may host core network functions.
  • C-CU 302 may be centrally deployed.
  • C-CU 302 functionality may be offloaded (e.g., to advanced wireless services (AWS) ) , in an effort to handle peak capacity.
  • AWS advanced wireless services
  • a centralized RAN unit (C-RU) 304 may host one or more ANC functions.
  • the C-RU 304 may host core network functions locally.
  • the C-RU 304 may have distributed deployment.
  • the C-RU 304 may be close to the network edge.
  • a DU 306 may host one or more TRPs (Edge Node (EN) , an Edge Unit (EU) , a Radio Head (RH) , a Smart Radio Head (SRH) , or the like) .
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • FIG. 4 illustrates example components of BS 110 and UE 120 (as depicted in FIG. 1) , which may be used to implement aspects of the present disclosure.
  • antennas 434, processors 420, 430, 438, and/or controller/processor 440 of the BS 110 may perform (or be used to perform) operations 700 of FIG. 7.
  • a transmit processor 420 may receive data from a data source 412 and control information from a controller/processor 440.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid ARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , etc.
  • the data may be for the physical downlink shared channel (PDSCH) , etc.
  • the processor 420 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 420 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and cell-specific reference signal (CRS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 432a through 432t. Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 432a through 432t may be transmitted via the antennas 434a through 434t, respectively.
  • the antennas 452a through 452r may receive the downlink signals from the base station 110 and may provide received signals to the demodulators (DEMODs) in transceivers 454a through 454r, respectively.
  • Each demodulator 454 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 456 may obtain received symbols from all the demodulators 454a through 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 460, and provide decoded control information to a controller/processor 480.
  • a transmit processor 464 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from a data source 462 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466 if applicable, further processed by the demodulators in transceivers 454a through 454r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 110.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the
  • the uplink signals from the UE 120 may be received by the antennas 434, processed by the modulators 432, detected by a MIMO detector 436 if applicable, and further processed by a receive processor 438 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 438 may provide the decoded data to a data sink 439 and the decoded control information to the controller/processor 440.
  • the controllers/processors 440 and 480 may direct the operation at the BS 110 and the UE 120, respectively.
  • the processor 440 and/or other processors and modules at the BS 110 may perform or direct the execution of processes for the techniques described herein.
  • the memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively.
  • a scheduler 444 may schedule UEs for data transmission on the downlink and/or uplink.
  • the basic transmission time interval (TTI) or packet duration is the 1 ms subframe.
  • a subframe is still 1 ms, but the basic TTI is referred to as a slot.
  • a subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots) depending on the subcarrier spacing.
  • the NR RB is 12 consecutive frequency subcarriers.
  • NR may support a base subcarrier spacing of 15 KHz and other subcarrier spacing may be defined with respect to the base subcarrier spacing, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.
  • the symbol and slot lengths scale with the subcarrier spacing.
  • the CP length also depends on the subcarrier spacing.
  • FIG. 5 is a diagram showing an example of a frame format 500 for NR.
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames.
  • Each radio frame may have a predetermined duration (e.g., 10 ms) and may be partitioned into 10 subframes, each of 1 ms, with indices of 0 through 9.
  • Each subframe may include a variable number of slots depending on the subcarrier spacing.
  • Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the subcarrier spacing.
  • the symbol periods in each slot may be assigned indices.
  • a mini-slot which may be referred to as a sub-slot structure, refers to a transmit time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols) .
  • Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission and the link direction for each subframe may be dynamically switched.
  • the link directions may be based on the slot format.
  • Each slot may include DL/UL data as well as DL/UL control information.
  • a synchronization signal (SS) block is transmitted.
  • the SS block includes a PSS, a SSS, and a two symbol PBCH.
  • the SS block can be transmitted in a fixed slot location, such as the symbols 0-3 as shown in FIG. 5.
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may provide half-frame timing, the SS may provide the CP length and frame timing.
  • the PSS and SSS may provide the cell identity.
  • the PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frame, SS burst set periodicity, system frame number, etc.
  • the SS blocks may be organized into SS bursts to support beam sweeping.
  • Further system information such as, remaining minimum system information (RMSI) , system information blocks (SIBs) , other system information (OSI) can be transmitted on a physical downlink shared channel (PDSCH) in certain subframes.
  • the SS block can be transmitted up to sixty-four times, for example, with up to sixty-four different beam directions for mmW.
  • the up to sixty-four transmissions of the SS block are referred to as the SS burst set.
  • SS blocks in an SS burst set are transmitted in the same frequency region, while SS blocks in different SS bursts sets can be transmitted at different frequency locations.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • a UE may operate in various radio resource configurations, including a configuration associated with transmitting pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc. ) or a configuration associated with transmitting pilots using a common set of resources (e.g., an RRC common state, etc. ) .
  • RRC radio resource control
  • the UE may select a dedicated set of resources for transmitting a pilot signal to a network.
  • the UE may select a common set of resources for transmitting a pilot signal to the network.
  • a pilot signal transmitted by the UE may be received by one or more network access devices, such as an AN, or a DU, or portions thereof.
  • Each receiving network access device may be configured to receive and measure pilot signals transmitted on the common set of resources, and also receive and measure pilot signals transmitted on dedicated sets of resources allocated to the UEs for which the network access device is a member of a monitoring set of network access devices for the UE.
  • One or more of the receiving network access devices, or a CU to which receiving network access device (s) transmit the measurements of the pilot signals may use the measurements to identify serving cells for the UEs, or to initiate a change of serving cell for one or more of the UEs.
  • aspects of the present disclosure may enable a small cell (e.g., pico cell or femto cell) base station to autonomously adjust its transmit power based on a calculated path loss between the small cell base station and a larger cell (e.g., macrocell) base station.
  • a heterogeneous network including a macrocell and one or more such smaller cells may benefit from reduced interference due to smaller cells near a cell center, while still providing enhanced coverage by smaller cells at the macrocell edge.
  • small cells (pico cells or femto cells) play an increasingly important role. Operators often need to deploy many small cells on the same spectrum to enhance capacity, in addition to (on top of) a macrocell coverage area.
  • NR network planning and transmit power tuning for every (NR) small cell. This may be particularly true for residential deployments. If a small cell always uses a pre-defined transmit power, it can cause severe interference to nearby Macrocell (s) , particularly if the small cell is near a macrocell center.
  • s Macrocell
  • FIG. 6 shows a heterogeneous network that illustrates the potential challenges of small cell transmit power management.
  • the example deployment has two small cells to enhance coverage of a macrocell domain.
  • the macrocell coverage domain is relatively large, and signal strength (e.g., as indicated by reference signal received power or RSRP) decreases from the macrocell center to the macrocell edge.
  • signal strength e.g., as indicated by reference signal received power or RSRP
  • RSRP reference signal received power
  • the macrocell can provide a good signal and data rate to an end user without small cell assistance.
  • aspects of the present disclosure may address these issues by enabling a small cell base station to autonomously adjust its transmit power based on a calculated path loss between the small cell base station and a macrocell base station.
  • FIG. 7 illustrates example operations 700 for wireless communications by a first base station, in accordance with certain aspects of the present disclosure.
  • Operations 700 may be performed, for example, by a pico cell BS 110x or femto cell BS 110y/110z of FIG. 1 to autonomously control transmit power.
  • Operations 700 begin, at 702, by measuring one or more reference signals transmitted by a second base station.
  • the base station perform network listening (for macrocell reference signals) .
  • the first base station calculates a path loss between the first base station and second base station based on the measurement.
  • the first base station adjusts a transmit power for one or more transmissions based on the calculated path loss.
  • the small cell base station may calculate air interface path loss between the small cell base station and the macrocell base station by performing a network listening function and manage transmit power of itself accordingly. This may allow the small cell base station to maintain strong (e.g., maximum) transmit power at the cell edge (where it is less likely to cause macrocell interference) and to shrink transmit power at the cell center (to reduce macrocell interference) .
  • the network listening function may mimic typical UE activity.
  • the small cell base station may decode a master information block (MIB) and/or other system information block (SIB) to identify the macrocell reference signal configuration. Based on this information, the small cell base station can measure downlink reference signal arrival power strength.
  • MIB master information block
  • SIB system information block
  • the small cell base station can calculate path loss.
  • the calculated path loss effectively gives the small cell BS an indication of its location (distance) relative to the macrocell center (the macrocell base station) .
  • the small cell BS may effectively quantize its relative location within/near the macrocell.
  • the small cell may be considered either: 1) at or near the macrocell center; or 2) at or near the cell edge.
  • the small cell location may be considered at or near the cell center if the calculated path loss value is less than some threshold value (e.g., 100dB) , which may be configurable (e.g., by a user or over the air) . Otherwise, if the calculated path loss value is greater than (or equal to) the threshold value, the small cell may be considered to be at or near the cell edge.
  • some threshold value e.g. 100dB
  • the small cell may adjust its transmit power (TP) as a function of the PL.
  • TP transmit power
  • the small cell sees a relatively high path loss (or PL increase) , it is more likely small cell more likely locate at macrocell edge and, thus, the small cell base station should maintain or increase it TP (subject to the physical constraint of its hardware design) .
  • the small cell sees a relatively small path loss (or PL decrease) , it is more likely the small cell is at or near the macrocell center and, thus, the small cell base station should maintain or decrease its TP.
  • enabling a small cell (e.g., pico cell or femto cell) base station to autonomously adjust its transmit power based on a calculated path loss between the small cell base station and a larger cell (e.g., macrocell) base station may reduce macrocell interference due to smaller cells near a cell center, while still providing enhanced coverage by smaller cells at the macrocell edge.
  • a small cell e.g., pico cell or femto cell
  • a larger cell e.g., macrocell
  • FIG. 9 illustrates a communications device 900 (e.g., a UE) that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations 700 illustrated in FIG. 7.
  • the communications device 900 includes a processing system 902 coupled to a transceiver 908 (e.g., a transmitter and/or a receiver) .
  • the transceiver 908 is configured to transmit and receive signals for the communications device 900 via an antenna 910, such as the various signals as described herein.
  • the processing system 902 may be configured to perform processing functions for the communications device 900, including processing signals received and/or to be transmitted by the communications device 900.
  • the processing system 902 includes a processor 904 coupled to a computer-readable medium/memory 912 via a bus 906.
  • the computer-readable medium/memory 912 is configured to store instructions (e.g., computer-executable code) that when executed by the processor 904, cause the processor 904 to perform the operations 900 illustrated in FIG. 9, or other operations for performing the various techniques discussed herein.
  • computer-readable medium/memory 912 stores code 914 for measuring one or more reference signals transmitted by a second base station, code 916 for calculating a path loss between the first base station and second base station based on the measurement, and code 918 for adjusting a transmit power for one or more transmissions based on the calculated path loss.
  • the processor 904 has circuitry configured to implement the code stored in the computer-readable medium/memory 912.
  • the processor 904 includes circuitry 920 for measuring one or more reference signals transmitted by a second base station, circuitry 922 for calculating a path loss between the first base station and second base station based on the measurement, and circuitry 924 for adjusting a transmit power for one or more transmissions based on the calculated path loss.
  • the methods disclosed herein comprise one or more steps or actions for achieving the methods.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit
  • processors 458, 464 and 466, and/or controller/processor 480 of the UE 120a and/or processors 420, 430, 438, and/or controller/processor 440 of the BS 110a shown in FIG. 4 may be configured to perform operations 700 of FIG. 7.
  • Means for receiving may include a transceiver, a receiver or at least one antenna and at least one receive processor illustrated in FIG. 4.
  • Means for transmitting, means for sending or means for outputting may include, a transceiver, a transmitter or at least one antenna and at least one transmit processor illustrated in FIG. 4.
  • Means for measuring, means for calculating, means for adjusting, means for decoding, means for identifying and means for maintaining may include a processing system, which may include one or more processors, such as processors 458, 464 and 466, and/or controller/processor 480 of the UE 120a and/or processors 420, 430, 438, and/or controller/processor 440 of the BS 110a shown in FIG. 4.
  • a device may have an interface to output a frame for transmission (ameans for outputting) .
  • a processor may output a frame, via a bus interface, to a radio frequency (RF) front end for transmission.
  • RF radio frequency
  • a device may have an interface to obtain a frame received from another device (ameans for obtaining) .
  • a processor may obtain (or receive) a frame, via a bus interface, from an RF front end for reception.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • an example hardware configuration may comprise a processing system in a wireless node.
  • the processing system may be implemented with a bus architecture.
  • the bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints.
  • the bus may link together various circuits including a processor, machine-readable media, and a bus interface.
  • the bus interface may be used to connect a network adapter, among other things, to the processing system via the bus.
  • the network adapter may be used to implement the signal processing functions of the PHY layer.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • the bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further.
  • the processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.
  • the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium.
  • Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • the processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media.
  • a computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
  • the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface.
  • the machine-readable media, or any portion thereof may be integrated into the processor, such as the case may be with cache and/or general register files.
  • machine-readable storage media may include, by way of example, RAM (Random Access Memory) , flash memory, ROM (Read Only Memory) , PROM (Programmable Read-Only Memory) , EPROM (Erasable Programmable Read-Only Memory) , EEPROM (Electrically Erasable Programmable Read-Only Memory) , registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • registers magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • the machine-readable media may be embodied in a computer-program product.
  • a software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
  • the computer-readable media may comprise a number of software modules.
  • the software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions.
  • the software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • the processor may load some of the instructions into cache to increase access speed.
  • One or more cache lines may then be loaded into a general register file for execution by the processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared (IR) , radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • computer-readable media may comprise transitory computer-readable media (e.g., a signal) . Combinations of the above should also be included within the scope of computer-readable media.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein.
  • modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des aspects de la présente divulgation concernent une technique de gestion autonome d'une puissance de transmission par une première station de base (par exemple, une petite cellule telle qu'une picocellule ou une femtocellule). Les techniques consistent d'une façon générale à mesurer un ou plusieurs signaux de référence transmis par une seconde station de base, à calculer un affaiblissement le long du trajet entre la première station de base et la seconde station de base sur la base de la mesure, et à ajuster une puissance de transmission pour une ou plusieurs transmissions sur la base de l'affaiblissement le long du trajet calculé.
PCT/CN2020/099212 2020-06-30 2020-06-30 Gestion autonome d'une puissance de transmission dans une petite cellule WO2022000255A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395184A (zh) * 2011-06-30 2012-03-28 电信科学技术研究院 一种实施上行功率控制的方法及装置
CN103037398A (zh) * 2011-09-30 2013-04-10 上海贝尔股份有限公司 确定上行链路路损以及提供接收点相关信息的方法和设备
CN103402206A (zh) * 2013-07-17 2013-11-20 华为技术有限公司 干扰处理方法和基站
US20140221038A1 (en) * 2011-09-28 2014-08-07 Sharp Kabushiki Kaisha Mobile station device, communication system, communication method, and integrated circuit
CN106797618A (zh) * 2014-09-03 2017-05-31 夏普株式会社 终端以及基站

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395184A (zh) * 2011-06-30 2012-03-28 电信科学技术研究院 一种实施上行功率控制的方法及装置
US20140221038A1 (en) * 2011-09-28 2014-08-07 Sharp Kabushiki Kaisha Mobile station device, communication system, communication method, and integrated circuit
CN103037398A (zh) * 2011-09-30 2013-04-10 上海贝尔股份有限公司 确定上行链路路损以及提供接收点相关信息的方法和设备
CN103402206A (zh) * 2013-07-17 2013-11-20 华为技术有限公司 干扰处理方法和基站
CN106797618A (zh) * 2014-09-03 2017-05-31 夏普株式会社 终端以及基站

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Overview of NR UL for LTE-NR coexistence", 3GPP DRAFT; R1-1706905, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Hangzhou, China; 20170515 - 20170519, 14 May 2017 (2017-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051272136 *

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