WO2023003571A1 - Appareil et procédé de traitement de signal dans une communication sans fil - Google Patents

Appareil et procédé de traitement de signal dans une communication sans fil Download PDF

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Publication number
WO2023003571A1
WO2023003571A1 PCT/US2021/043064 US2021043064W WO2023003571A1 WO 2023003571 A1 WO2023003571 A1 WO 2023003571A1 US 2021043064 W US2021043064 W US 2021043064W WO 2023003571 A1 WO2023003571 A1 WO 2023003571A1
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WO
WIPO (PCT)
Prior art keywords
baseband
chip
operations
circuits
reception
Prior art date
Application number
PCT/US2021/043064
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English (en)
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WO2023003571A8 (fr
Inventor
Ricky Lap Kei CHEUNG
Jian Gu
Jun Ni
Li Cong
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Zeku, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Zeku, Inc. filed Critical Zeku, Inc.
Priority to PCT/US2021/043064 priority Critical patent/WO2023003571A1/fr
Publication of WO2023003571A1 publication Critical patent/WO2023003571A1/fr
Publication of WO2023003571A8 publication Critical patent/WO2023003571A8/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • Embodiments of the present disclosure relate to apparatus and method for wireless communication.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • cellular communication such as the 4th-generation (4G) Long Term Evolution (LTE) and the 5th- generation (5G) New Radio (NR), the 3rd Generation Partnership Project (3GPP) defines various operations for signal processing.
  • 4G Long Term Evolution
  • 5G 5th-generation (5G) New Radio
  • 3GPP 3rd Generation Partnership Project
  • an apparatus of wireless communication of a user equipment may include an RF chip including a first set of baseband circuits.
  • the first set of baseband circuits may be configured to, in response to a first reception condition, perform first baseband operations.
  • the apparatus may include a baseband chip including a second set of baseband circuits.
  • the second set of baseband circuits may be configured to, in response to a second reception condition, perform second baseband operations.
  • an RF chip may include a first set of baseband circuits configured to perform first baseband operations associated with a first reception condition.
  • the RF chip may include a controller.
  • the controller may be configured to, in response to a first reception condition, activate the first set of baseband circuits of the RF chip.
  • the controller may be configured to, in response to a second reception condition, activate a second set of baseband circuits of a baseband chip.
  • a method of wireless communication of a user equipment may include performing, by a first set of baseband circuits of an RF chip, first baseband operations in response to a first reception condition.
  • the method may include performing, by a second set of baseband circuits of a baseband chip, second baseband operations in response to a second reception condition.
  • the first baseband operations mays include a subset of the second baseband operations.
  • FIG. 1 illustrates an exemplary wireless network, according to some embodiments of the present disclosure.
  • FIG. 2 illustrates a block diagram of an apparatus including a baseband chip, a radio frequency (RF) chip, and a host chip, according to some embodiments of the present disclosure.
  • FIG. 3 illustrates a detailed view of the RF chip and baseband chip of the apparatus of FIG. 2, according to some embodiments of the present disclosure.
  • FIG. 4 illustrates a flow chart of an exemplary method of wireless communication, according to some embodiments of the present disclosure.
  • FIG. 5 illustrates a block diagram of an exemplary node, according to some embodiments of the present disclosure.
  • FIG. 6A illustrates the RF chip and baseband chip of a conventional UE.
  • FIG. 6B illustrates a graphical representation of the power consumption during physical downlink control channel (PDCCH) reception of a conventional UE.
  • PDCCH physical downlink control channel
  • references in the specification to “one embodiment,” “an embodiment,” “an example embodiment,” “some embodiments,” “certain embodiments,” etc. indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it would be within the knowledge of a person skilled in the pertinent art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • the term “one or more” as used herein, depending at least in part upon context, may be used to describe any feature, structure, or characteristic in a singular sense or may be used to describe combinations of features, structures or characteristics in a plural sense.
  • terms, such as “a,” “an,” or “the,” again, may be understood to convey a singular usage or to convey a plural usage, depending at least in part upon context.
  • the term “based on” may be understood as not necessarily intended to convey an exclusive set of factors and may, instead, allow for existence of additional factors not necessarily expressly described, again, depending at least in part on context.
  • 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
  • WLAN wireless local area network
  • a CDMA network may implement a radio access technology (RAT), such as Universal Terrestrial Radio Access (UTRA), evolved UTRA (E-UTRA), CDMA 2000, etc.
  • RAT radio access technology
  • UTRA Universal Terrestrial Radio Access
  • E-UTRA evolved UTRA
  • CDMA 2000 etc.
  • GSM Global System for Mobile Communications
  • An OFDMA network may implement a RAT, such as LTE or NR.
  • a WLAN system may implement a RAT, such as Wi-Fi.
  • the techniques described herein may be used for the wireless networks and RATs mentioned above, as well as other wireless networks and RATs.
  • a user equipment In wireless communication, a user equipment typically performs operations associated with cell searching, control channel (CCH) processing, and shared channel (SCH) processing using its baseband chip.
  • CCH control channel
  • SCH shared channel
  • FIG. 6A illustrates a block diagram of a conventional user equipment 600 that includes a radio frequency (RF) chip 602 and a baseband chip 604.
  • RF chip 602 of conventional user equipment 600 may include, e.g., an analog circuit 606, a digital front end (DFE) RF circuit 608, and an RF/baseband (BB) interface 610.
  • Baseband chip 604 of conventional user equipment 600 may include, e.g., RF/BB interface 612, DFE BB circuit 614, search/measurement circuit 616, CCH receiver circuit 618, and SCH receiver circuit 620.
  • analog circuit 606 may include, e.g., a mixer, a low pass filter, a phase-locked loop (PLL), a low-noise amplifier (LNA), etc.
  • DFE RF circuit 608 may perform operations such as RF impairment compensation, frequency rotation, digital gain control, digital filtering, downsampling, etc.
  • RF/BB interfaces 610 and 612 may be used to send/receive signals between RF chip 602 and baseband chip 604.
  • RF/BB interfaces 610, 612 may include a standardized interface (e.g., mobile industry processor interface (MIPI), M-PHY interface, peripheral component interface express (PCI-e), etc.) or a proprietary interface.
  • MIPI mobile industry processor interface
  • M-PHY interface M-PHY interface
  • PCI-e peripheral component interface express
  • DFE BB circuit 614 may perform operations, e.g., such as digital gain control, digital filtering, downsampling, fast-Fourier transform (FFT), etc.
  • Search/measurement circuit 616 may perform operations associated with serving and neighboring cell search, as well as channel measurement s) of the serving cell.
  • CCH receiver circuit 618 may perform channel estimation, demodulation, and decoding for the physical broadcast channel (PBCH) and PDCCH.
  • SCH receiver circuit 620 may perform channel estimation, demodulation, and decoding for the PD SCH.
  • One challenge of conventional user equipment 600 relates to the power consumption of the RF chip 602 and baseband chip 604. This challenge is made worse during certain reception conditions, e.g., such discontinuous reception (DRX) (e.g., connected mode DRX (CDRX)), low throughput, and PDCCH-only reception, e.g., as illustrated in FIG. 6B.
  • DRX discontinuous reception
  • CDRX connected mode DRX
  • PDCCH-only reception e.g., as illustrated in FIG. 6B.
  • the power diagram 650 of FIG. 6B illustrates the undesirable power consumption of conventional RF chip 602 and baseband chip 604 during DRX, low throughput scenarios, and PDCCH-only reception.
  • RF/BB interfaces 610, 612 consume a significant amount of power over a lengthy duration.
  • baseband chip 604 may include a processor (not shown in FIG. 6A) that consumes a significant amount of power when activated along with search/measurement circuit 616, CCH receiver circuit 618, and SCH receiver circuit 620 during DRX, low throughput, or PDCCH-only reception.
  • the user equipment of the present disclosure includes a set of baseband circuits in the RF chip that can be activated during certain reception conditions. During these reception conditions, the baseband chip and the RF/BB interfaces may remain in low power mode, thereby reducing the power consumption considerably during those reception conditions mentioned above.
  • the set of baseband circuits at the RF chip may be “mini” circuits, meaning that they are each configured to perform a subset or a limited set of baseband operations as compared to the set of more complex baseband circuits at the baseband chip.
  • a controller of the RF chip may determine when a first reception condition (e.g., DRX, low throughput, PDCCH-only reception) at the user equipment arises.
  • a first reception condition e.g., DRX, low throughput, PDCCH-only reception
  • the controller may active a first set of baseband circuits (e.g., “mini” baseband circuits) at the RF chip, which enables the RF/BB interfaces and the baseband chip, including its set of baseband circuits, and processor(s), to remain in low power mode.
  • a first reception condition e.g., DRX, low throughput, PDCCH-only reception
  • the controller may active a first set of baseband circuits (e.g., “mini” baseband circuits) at the RF chip, which enables the RF/BB interfaces and the baseband chip, including its set of baseband circuits, and processor(s), to remain in low power mode.
  • a first reception condition e.g.
  • the controller of the RF chip may activate a second set of baseband circuits at the baseband chip.
  • the more powerful set of baseband circuits of the baseband chip may be able to handle a larger number of component carriers (CCs), perform more complex demodulation, de-spreading, decoding, and channel estimation operations, among others.
  • CCs component carriers
  • Using different baseband circuits under different reception conditions provides optimization of power consumption and baseband performance. Additional details of the baseband circuits of the RF chip and the baseband chip are described below in connection with FIGs. 1-5. [0029] FIG.
  • wireless network 100 may include a network of nodes, such as a user equipment 102, an access node 104, and a core network element 106.
  • User equipment 102 may be any terminal device, such as a mobile phone, a desktop computer, a laptop computer, a tablet, a vehicle computer, a gaming console, a printer, a positioning device, a wearable electronic device, a smart sensor, or any other device capable of receiving, processing, and transmitting information, such as any member of a vehicle to everything (V2X) network, a cluster network, a smart grid node, or an Internet-of-Things (IoT) node.
  • V2X vehicle to everything
  • cluster network such as a cluster network
  • smart grid node such as a smart grid node
  • IoT Internet-of-Things
  • Access node 104 may be a device that communicates with user equipment 102, such as a wireless access point, a base station (BS), a Node B, an enhanced Node B (eNodeB or eNB), a next-generation NodeB (gNodeB or gNB), a cluster master node, or the like. Access node 104 may have a wired connection to user equipment 102, a wireless connection to user equipment 102, or any combination thereof. Access node 104 may be connected to user equipment 102 by multiple connections, and user equipment 102 may be connected to other access nodes in addition to access node 104. Access node 104 may also be connected to other user equipments.
  • BS base station
  • eNodeB or eNB enhanced Node B
  • gNodeB or gNB next-generation NodeB
  • access node 104 may operate in millimeter wave (mmW) frequencies and/or near mmW frequencies in communication with the user equipment 102.
  • mmW millimeter wave
  • the access node 104 may be referred to as an mmW base station.
  • Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW or near mmW radio frequency band have extremely high path loss and a short range.
  • the mmW base station may utilize beamforming with user equipment 102 to compensate for the extremely high path loss and short range. It is understood that access node 104 is illustrated by a radio tower by way of illustration and not by way of limitation.
  • Access nodes 104 which are collectively referred to as E-UTRAN in the evolved packet core network (EPC) and as NG-RAN in the 5G core network (5GC), interface with the EPC and 5GC, respectively, through dedicated backhaul links (e.g., SI interface).
  • EPC evolved packet core network
  • 5GC 5G core network
  • access node 104 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages.
  • Access nodes 104 may communicate directly or indirectly (e.g., through the 5GC) with each other over backhaul links (e.g., X2 interface).
  • the backhaul links may be wired or wireless.
  • Core network element 106 may serve access node 104 and user equipment 102 to provide core network services.
  • core network element 106 may include a home subscriber server (HSS), a mobility management entity (MME), a serving gateway (SGW), or a packet data network gateway (PGW).
  • HSS home subscriber server
  • MME mobility management entity
  • SGW serving gateway
  • PGW packet data network gateway
  • EPC evolved packet core
  • core network element 106 includes an access and mobility management function (AMF), a session management function (SMF), or a user plane function (UPF) of the 5GC for the NR system.
  • the AMF may be in communication with a Unified Data Management (UDM).
  • UDM Unified Data Management
  • the AMF is the control node that processes the signaling between the user equipment 102 and the 5GC.
  • the AMF provides quality-of-service (QoS) flow and session management. All user Internet protocol (IP) packets are transferred through the UPF.
  • IP Internet protocol
  • the UPF provides UE IP address allocation as well as other functions.
  • the UPF is connected to the IP Services.
  • the IP Services may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Streaming Service, and/or other IP services. It is understood that core network element 106 is shown as a set of rack-mounted servers by way of illustration and not by way of limitation.
  • Core network element 106 may connect with a large network, such as the Internet
  • IP Internet Protocol
  • data from user equipment 102 may be communicated to other user equipments connected to other access points, including, for example, a computer 110 connected to Internet 108, for example, using a wired connection or a wireless connection, or to a tablet 112 wirelessly connected to Internet 108 via a router 114.
  • computer 110 and tablet 112 provide additional examples of possible user equipments
  • router 114 provides an example of another possible access node.
  • a generic example of a rack-mounted server is provided as an illustration of core network element 106. However, there may be multiple elements in the core network including database servers, such as a database 116, and security and authentication servers, such as an authentication server 118.
  • Database 116 may, for example, manage data related to user subscription to network services.
  • a home location register (HLR) is an example of a standardized database of subscriber information for a cellular network.
  • authentication server 118 may handle authentication of users, sessions, and so on.
  • an authentication server function (AUSF) device may be the entity to perform user equipment authentication.
  • a single server rack may handle multiple such functions, such that the connections between core network element 106, authentication server 118, and database 116, may be local connections within a single rack.
  • Each element in FIG. 1 may be considered a node of wireless network 100. More detail regarding the possible implementation of a node is provided by way of example in the description of a node 500 in FIG. 5.
  • Node 500 may be configured as user equipment 102, access node 104, or core network element 106 in FIG. 1.
  • node 500 may also be configured as computer 110, router 114, tablet 112, database 116, or authentication server 118 in FIG. 1.
  • node 500 may include a processor 502, a memory 504, and a transceiver 506. These components are shown as connected to one another by a bus, but other connection types are also permitted.
  • node 500 When node 500 is user equipment 102, additional components may also be included, such as a user interface (UI), sensors, and the like. Similarly, node 500 may be implemented as a blade in a server system when node 500 is configured as core network element 106. Other implementations are also possible.
  • UI user interface
  • sensors sensors
  • core network element 106 Other implementations are also possible.
  • Transceiver 506 may include any suitable device for sending and/or receiving data.
  • Node 500 may include one or more transceivers, although only one transceiver 506 is shown for simplicity of illustration.
  • An antenna 508 is shown as a possible communication mechanism for node 500. Multiple antennas and/or arrays of antennas may be utilized for receiving multiple spatially multiplex data streams.
  • examples of node 500 may communicate using wired techniques rather than (or in addition to) wireless techniques.
  • access node 104 may communicate wirelessly to user equipment 102 and may communicate by a wired connection (for example, by optical or coaxial cable) to core network element 106.
  • Other communication hardware such as a network interface card (NIC), may be included as well.
  • NIC network interface card
  • node 500 may include processor 502. Although only one processor is shown, it is understood that multiple processors can be included.
  • Processor 502 may include microprocessors, microcontroller units (MCUs), digital signal processors (DSPs), application-specific integrated circuits (ASICs), 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 functions described throughout the present disclosure.
  • Processor 502 may be a hardware device having one or more processing cores.
  • Processor 502 may execute software.
  • node 500 may also include memory 504. Although only one memory is shown, it is understood that multiple memories can be included. Memory 504 can broadly include both memory and storage.
  • memory 504 may include random-access memory (RAM), read-only memory (ROM), static RAM (SRAM), dynamic RAM (DRAM), ferro electric RAM (FRAM), electrically erasable programmable ROM (EEPROM), compact disc read only memory (CD-ROM) or other optical disk storage, hard disk drive (HDD), such as magnetic disk storage or other magnetic storage devices, Flash drive, solid-state drive (SSD), or any other medium that can be used to carry or store desired program code in the form of instructions that can be accessed and executed by processor 502.
  • RAM random-access memory
  • ROM read-only memory
  • SRAM static RAM
  • DRAM dynamic RAM
  • FRAM ferro electric RAM
  • EEPROM electrically erasable programmable ROM
  • CD-ROM compact disc read only memory
  • HDD hard disk drive
  • Flash drive such as magnetic disk storage or other magnetic storage devices
  • SSD solid-state drive
  • memory 504 may be embodied by any computer-readable medium, such as a non-transitory computer-readable medium.
  • Processor 502, memory 504, and transceiver 506 may be implemented in various forms in node 500 for performing wireless communication functions.
  • processor 502, memory 504, and transceiver 506 of node 500 are implemented (e.g., integrated) on one or more system-on-chips (SoCs).
  • SoCs system-on-chips
  • processor 502 and memory 504 may be integrated on an application processor (AP) SoC (sometimes known as a “host,” referred to herein as a “host chip”) that handles application processing in an operating system (OS) environment, including generating raw data to be transmitted.
  • API application processor
  • OS operating system
  • processor 502 and memory 504 may be integrated on a baseband processor (BP) SoC (sometimes known as a “modem,” referred to herein as a “baseband chip”) that converts the raw data, e.g., from the host chip, to signals that can be used to modulate the carrier frequency for transmission, and vice versa, which can run a real-time operating system (RTOS).
  • BP baseband processor
  • RTOS real-time operating system
  • processor 502 and transceiver 506 may be integrated on an RF SoC (sometimes known as a “transceiver,” referred to herein as an “RF chip”) that transmits and receives RF signals with antenna 508.
  • RF SoC sometimes known as a “transceiver,” referred to herein as an “RF chip”
  • some or all of the host chip, baseband chip, and RF chip may be integrated as a single SoC.
  • a baseband chip and an RF chip may be integrated into a single SoC that manages all the radio functions for cellular communication.
  • any suitable node of wireless network 100 may include an RF chip that includes a first set of baseband circuits and a baseband chip that includes a second set of baseband circuits.
  • the first set of baseband circuits of the RF chip may include “mini” circuits that perform a subset of the baseband operations/capabilities/complexities of the second set of baseband circuits of the baseband chip.
  • user equipment 102 may include a controller (e.g., at the RF chip or elsewhere in user equipment 102) that is configured to identify when first reception condition (e.g., DRX, low throughput, PDCCH-only reception, etc.) or a second reception condition (e.g., non- DRX, high throughput, PDCCH/PDSCH reception, etc.) occurs.
  • first reception condition e.g., DRX, low throughput, PDCCH-only reception, etc.
  • second reception condition e.g., non- DRX, high throughput, PDCCH/PDSCH reception, etc.
  • the controller may activate the first set of baseband circuits at the RF chip.
  • the RF/BB interfaces and the baseband chip including the second set of baseband circuits and processor, may remain in a reduced power mode.
  • the controller may activate the second set of baseband circuits at the baseband chip, as well as the RF/BB interfaces, so that the full range of baseband circuit operations are available.
  • the first set of baseband circuits at the RF chip may remain in the reduced power state under the second reception condition.
  • FIG. 2 illustrates a block diagram of an apparatus 200 including a baseband chip
  • Apparatus 200 may be implemented as user equipment 102 of wireless network 100 in FIG. 1. As shown in FIG. 2, apparatus 200 may include baseband chip 202, RF chip 204, host chip 206, and one or more antennas 210.
  • baseband chip 202 is implemented by processor 502 and memory 504, and RF chip 204 is implemented by processor 502, memory 504, and transceiver 506, as described above with respect to FIG. 5.
  • apparatus 200 may further include an external memory 208 (e.g., the system memory or main memory) that can be shared by each chip 202, 204, or 206 through the system/main bus.
  • external memory 208 e.g., the system memory or main memory
  • baseband chip 202 is illustrated as a standalone SoC in FIG.
  • baseband chip 202 and RF chip 204 may be integrated as one SoC; in another example, baseband chip 202 and host chip 206 may be integrated as one SoC; in still another example, baseband chip 202, RF chip 204, and host chip 206 may be integrated as one SoC, as described above.
  • host chip 206 may generate raw data and send it to baseband chip 202 for encoding, modulation, and mapping.
  • Host/BB interface unit 216 of baseband chip 202 may receive the data from host chip 206.
  • Baseband chip 202 may also access the raw data generated by host chip 206 and stored in external memory 208, for example, using the direct memory access (DMA).
  • Baseband chip 202 may first encode (e.g., by source coding and/or channel coding) the raw data and modulate the coded data using any suitable modulation techniques, such as multi phase shift keying (MPSK) modulation or quadrature amplitude modulation (QAM).
  • MPSK multi phase shift keying
  • QAM quadrature amplitude modulation
  • Baseband chip 202 may perform any other functions, such as symbol or layer mapping, to convert the raw data into a signal that can be used to modulate the carrier frequency for transmission.
  • baseband chip 202 may send the modulated signal to RF chip 204 via RF/BB interface unit 214.
  • RF chip 204 through the transmitter, may convert the modulated signal in the digital form into analog signals, i.e., RF signals, and perform any suitable front-end RF functions, such as filtering, digital pre-distortion, up-conversion, or sample-rate conversion.
  • Antenna 210 e.g., an antenna array
  • antenna 210 may receive RF signals from an access node or other wireless device.
  • the RF signals may be passed to the RF circuits 226 of RF chip 204.
  • RF circuits 226 may perform any suitable front-end RF functions, such as filtering, IQ imbalance compensation, down-paging conversion, or sample-rate conversion, and convert the RF signals (e.g., transmission) into low-frequency digital signals (baseband signals) that can be passed to baseband chip 202 via RF/BB interfaces 214.
  • RF chip 204 may also include a controller 222 (e.g., implemented as hardware, firmware, or software) and a first set of baseband circuits 224.
  • Baseband chip 202 may include a second set of baseband circuits 220.
  • the first set of baseband circuits 224 of the RF chip 204 may include “mini” circuits that perform a subset of the baseband operations/capabilities/complexities of the second set of baseband circuits 220 of the baseband chip.
  • controller 222 e.g., which may be located anywhere in apparatus 200
  • controller 222 may determine when the first reception condition or the second reception condition occurs based on signaling or configuration information from a base station, e.g., such as by access node 104 in FIG. 1.
  • controller 222 may activate the first set of baseband circuits 224 at the RF chip 204 such that the RF/BB interfaces 214 and baseband chip 202, including the second set of baseband circuits 220 and processor (not shown), may remain in a reduced or low power mode.
  • the clock (not shown) at baseband chip 202 may be powered on, while RF/BB interface 214 and the second set of baseband circuits 220 are powered off.
  • the clock, RF/BB interface 214, and the second set of baseband circuits 220 of baseband chip 202 may be powered off.
  • controller 222 may activate the second set of baseband circuits 220 at the baseband chip 202, as well as the RF/BB interfaces 214, so that the full range of baseband circuit operations are available.
  • the first set of baseband circuits 224 at the RF chip 204 may remain in the reduced power state under the second reception condition.
  • a set of “mini” baseband circuits e.g., first set of baseband circuits 224
  • performance optimization may be achieved under different reception conditions, as compared with conventional devices and approaches that only use baseband circuits at the baseband chip.
  • FIG. 3 illustrates a detailed view of RF chip 204 and baseband chip 202 of the apparatus 200 of FIG. 2, according to some embodiments of the present disclosure.
  • RF circuits 226 of RF chip 204 may include an analog circuit 302 and a DFE RF circuit 304.
  • First set of baseband circuits 224 of RF chip 204 may include one or more of, e.g., a mini- DFE baseband circuit 306, a mini-search circuit 308, a mini-CCH receiver circuit 310, and a mini- SCH receiver circuit 312.
  • mini-search circuit 308 may be omitted from first set of baseband circuits 224.
  • second set of baseband circuits 220 may include one or more of, e.g., DFE baseband circuit 314, search/measurement circuit 316, CCH receiver circuit 318, and SCH receiver circuit 320.
  • controller 222 may activate first set of baseband circuits 224.
  • controller 222 may activate second set of baseband circuits 220 and RF/BB interfaces 214 at RF chip 204 and baseband chip 202 in response to a second reception condition (e.g., non-DRX, high throughput, PDCCH/PDSCH reception, etc.).
  • a second reception condition e.g., non-DRX, high throughput, PDCCH/PDSCH reception, etc.
  • signals received from the base station may be processed by RF circuits 226 and then passed to second set of baseband circuits 220 via RF/BB interfaces 214.
  • DFE baseband circuit 314 may perform operations such as digital gain control, digital filtering, downsampling, FFT, etc.
  • Search/measurement circuit 316 may perform operations associated with cell search for the serving and neighboring cells, as well as performing channel measurement(s) of the serving cell.
  • CCH receiver circuit 318 may perform channel estimation, demodulation, and decoding for both the physical broadcast channel (PBCH) and the PDCCH.
  • SCH receiver circuit 320 may perform channel estimation, demodulation, and decoding for the PDSCH.
  • Each of the circuits of first set of baseband circuits 224 of RF chip 204 may be implemented as a simplified version of its counterpart circuit in the second set of baseband circuits 220.
  • these simplifications may include: 1) performing a simplified set of functions and/or algorithms, 2) processing signals of a shorter bit-width, 3) implementation as hardware rather than firmware, 4) limited capabilities with respect to the number of CCs served, the number of Rx antennas served, a lower multiple-input multiple-output (MIMO) rank, or supporting a lower maximum data rate.
  • MIMO multiple-input multiple-output
  • mini-DFE baseband circuit 306 may support fewer data paths associated with fewer Rx antennas than DFE baseband circuit 314. Further, mini-DFE baseband circuit 306 may include a digital filter with a shorter length than that used by DFE baseband circuit 314. Still further, mini-DFE baseband circuit 306 may have a shorter processing latency than DFE baseband circuit 314. Compared with search/measurement circuit 316 of baseband chip 202, mini search circuit 308 may not perform channel measurement of the serving or neighboring cells. Mini search circuit 308 may perform other baseband operations, e.g., such as synchronization and the determination of timing and frequency offsets. Unlike CCH receiver circuit 318 of baseband chip 202, mini-CCH receiver circuit 310 may not support PBCH reception. Instead, mini-CCH receiver circuit 310 may be configured to support PDCCH reception.
  • mini-SCH receiver circuit 312 may support a lower MIMO rank and a lower data rate, for example.
  • mini-SCH receiver circuit 312 may support hybrid-automatic repeat request (HARQ) operations.
  • mini-SCH receiver circuit 312 may not support HARQ operations.
  • mini-SCH receiver circuit 312 may perform a reduced channel estimation algorithm, as compared to SCH receiver circuit 320.
  • mini-SCH receiver circuit 312 may perform a one-dimensional channel estimation algorithm rather than a two-dimensional channel estimation algorithm.
  • SCH receiver circuit 320 may support both one dimensional and two-dimensional channel estimation.
  • mini-SCH receiver circuit 312 may use a reduced number of filter taps, update channel filter coefficients less frequently, or use a simplified MIMO detection algorithm, as compared with SCH receiver circuit 320.
  • the decoder of mini-SCH receiver circuit 312 may support lower parallelism associated with low-throughput scenarios. Supporting lower parallelism, mini-SCH receiver circuit 312 to be designed with a reduced size (e.g., which uses less power consumption), as compared with the decoder of SCH receiver circuit 320.
  • mini-CCH receiver circuit 310 and mini-SCH receiver circuit 312 both provide power savings over their counterpart circuits in baseband chip 202, they may reduce the overall performance of the system.
  • controller 222 may determine that a performance or capability requirement is not met while using these receivers of the first set of baseband circuits 224.
  • controller 222 may deactivate mini-CCH receiver circuit 310 and/or mini-SCH receiver circuit 312, and instead, activate CCH receiver circuit 318 and/or SCH receiver circuit 320 to achieve a desired performance or capability.
  • controller 222 may activate one or more circuits of first set of baseband circuits 224, 2) RF/BB interfaces 214 of RF chip 204 and baseband chip 202 may remain in reduced power mode, 3) data of all PDCCH symbols may be buffered in DFE RF circuit 304 until PDCCH decoding is complete (e.g., when PDSCH may be sent in PDCCH symbols), 4) data from the potential PDSCH symbols may be buffered in DFE RF circuit 304 until PDCCH decoding is complete (e.g., when PDCCH and PDSCH is not sent in the same symbols), 5) mini-CCH receiver circuit 310 may attempt to decode PDCCH, 6) when a downlink control information (DCI) is not received in the PDCCH, RF chip 204 may enter reduced-power mode, and 7) if a DCI is received in PDCCH, controller 222 may determine whether to instruct D
  • DCI downlink control information
  • controller 222 may determine whether to activate mini-search circuit 308 when a synchronization signal block (SSB) or a primary synchronization signal (PSS)/secondary synchronization signal (SSS) is sent in a slot that does not include PDSCH symbols or when mini-SCH receiver circuit 312 is not used to receive PDSCH.
  • SSB synchronization signal block
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • FIG. 4 illustrates a flowchart of an exemplary method 400 of wireless communication, according to embodiments of the disclosure.
  • Exemplary method 400 may be performed by an apparatus for wireless communication, e.g., such as user equipment 102, apparatus 200, baseband chip 202, RF chip 204, first set of baseband circuits 224, RF circuits 226, RF/BB interface(s) 214, second set of baseband circuits 220, and/or node 500.
  • Method 400 may include steps 402-408 as described below. It is to be appreciated that some of the steps may be optional, and some of the steps may be performed simultaneously, or in a different order than shown in FIG. 4.
  • the apparatus may activate a first set of baseband circuits of the RF chip in response to a first reception condition.
  • a first reception condition e.g., DRX, low throughput, PDCCH-only reception, etc.
  • controller 222 may activate first set of baseband circuits 224.
  • the apparatus may perform first baseband operations when the first set of baseband circuits of the RF chip are activated.
  • each of the circuits of first set of baseband circuits 224 of RF chip 204 may be implemented as a simplified version of its counterpart circuit in the second set of baseband circuits 220.
  • these simplifications may include: 1) performing a simplified set of functions and/or algorithms, 2) processing signals of a shorter bit-width, 3) implementation as hardware rather than firmware, 4) limited capabilities with respect to the number of CCs served, the number of Rx antennas served, a lower multiple-input multiple-output (MIMO) rank, or supporting a lower maximum data rate.
  • MIMO multiple-input multiple-output
  • mini-DFE baseband circuit 306 may support fewer data paths associated with fewer Rx antennas than DFE baseband circuit 314. Further, mini-DFE baseband circuit 306 may include a digital filter with a shorter length than that of DFE baseband circuit 314. Still further, mini-DFE baseband circuit 306 may have a shorter processing latency than DFE baseband circuit 314. Compared with search/measurement circuit 316 of baseband chip 202, mini- search circuit 308 may not perform channel measurement of the serving or neighboring cells. Mini search circuit 308 may perform other baseband operations, e.g., such as synchronization and the determination of timing and frequency offsets.
  • mini-CCH receiver circuit 310 may not support PBCH reception. Instead, mini-CCH receiver circuit 310 may be configured to support PDCCH reception. As compared with SCH receiver circuit 320 of baseband chip 202, mini-SCH receiver circuit 312 may support a lower MIMO rank and a lower data rate, for example. In some embodiments, mini-SCH receiver circuit 312 may support hybrid-automatic repeat request (HARQ) operations. However, in some other embodiments, mini-SCH receiver circuit 312 may not support HARQ operations. Moreover, mini- SCH receiver circuit 312 may perform a reduced channel estimation algorithm, as compared to SCH receiver circuit 320.
  • HARQ hybrid-automatic repeat request
  • mini-SCH receiver circuit 312 may perform a one dimensional channel estimation algorithm rather than a two-dimensional channel estimation algorithm, which may be performed by SCH receiver circuit 320. Still further, mini-SCH receiver circuit 312 may use a reduced number of filter taps, update channel filter coefficients less frequently, or use a simplified MIMO detection algorithm, as compared with SCH receiver circuit 320. In some embodiments, the decoder of mini-SCH receiver circuit 312 may implement lower parallelism for low throughput scenarios, which enables mini-SCH receiver circuit 312 to be implemented with a reduced size (e.g., which uses less power consumption), as compared with the decoder of SCH receiver circuit 320.
  • a reduced size e.g., which uses less power consumption
  • the apparatus may activate a second set of baseband circuits of the baseband chip in response to a second reception condition.
  • a second reception condition e.g., non-DRX, high throughput, PDCCH/PDSCH reception, etc.
  • controller 222 may activate second set of baseband circuits 220 and RF/BB interfaces 214 at RF chip 204 and baseband chip 202.
  • the apparatus may perform second baseband operations when the second set of baseband circuits of the baseband chip are activated.
  • DFE BB circuit 314 may perform operations such as, e.g., digital gain control, digital filtering, downsampling, FFT, etc.
  • Search/measurement circuit 316 may perform operations associated with cell search for the serving and neighboring cells, as well as performing channel measurement s) of the serving cell.
  • CCH receiver circuit 318 may perform channel estimation, demodulation, and decoding for the physical broadcast channel (PBCH), as well as the PDCCH.
  • SCH receiver circuit 320 may perform channel estimation, demodulation, and decoding for the PD SCH.
  • the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or encoded as instructions or code on a non-transitory computer-readable medium.
  • Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computing device, such as node 500 in FIG. 5.
  • such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, HDD, such as magnetic disk storage or other magnetic storage devices, Flash drive, SSD, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a processing system, such as a mobile device or a computer.
  • Disk and disc includes CD, laser disc, optical disc, digital video disc (DVD), and floppy disk where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • an apparatus of wireless communication of a user equipment may include an RF chip including a first set of baseband circuits.
  • the first set of baseband circuits may be configured to, in response to a first reception condition, perform first baseband operations.
  • the apparatus may include a baseband chip including a second set of baseband circuits.
  • the second set of baseband circuits may be configured to, in response to a second reception condition, perform second baseband operations.
  • the first set of baseband circuits may be further configured to, in response to the second reception condition, remain in a reduced-power mode.
  • the second set of baseband circuits may be further configured to, in response to the first reception condition, remain in the reduced-power mode.
  • the RF chip may further include a controller.
  • the controller may be configured to, in response to the first reception condition, activate the first set of baseband circuits of the RF chip.
  • the controller may be configured to, in response to the second reception condition, activate the second set of baseband circuits of the baseband chip.
  • the RF chip may further include a first interface configured to interface with the baseband chip.
  • the baseband chip may further include a second interface configured to interface with the RF chip.
  • the controller may be further configured to, in response to the second reception condition, activate the first interface and the second interface.
  • the first reception condition includes one or more of a DRX, a first data throughput level less than a threshold, or a PDCCH reception without PDSCH reception.
  • the second reception condition includes one or more of a non-DRX, a second data throughput level greater than or equal to the threshold, or a PDCCH reception with PDSCH reception.
  • the first set of baseband circuits may include a first DFE baseband circuit configured to perform first DFE operations. In some embodiments, the first set of baseband circuits may include a CCH receiver configured to perform first CCH operations. [0069] In some embodiments, the first set of baseband circuits may further include a cell search circuit configured to perform first cell search operations. In some embodiments, the first set of baseband circuits may further include a first SCH receiver configured to perform first SCH operations.
  • the second set of baseband circuits may include a second
  • the DFE baseband circuit configured to perform second DFE operations.
  • the second set of baseband circuits may include a cell search and measurement circuit configured to perform second cell search operations and channel measurement operations.
  • the second set of baseband circuits may include a second CCH receiver configured to perform second CCH operations.
  • the second set of baseband circuits may include a second SCH receiver configured to perform second SCH operations.
  • an RF chip may include a first set of baseband circuits configured to perform first baseband operations associated with a first reception condition.
  • the RF chip may include a controller.
  • the controller may be configured to, in response to a first reception condition, activate the first set of baseband circuits of the RF chip.
  • the controller may be configured to, in response to a second reception condition, activate a second set of baseband circuits of a baseband chip.
  • the RF chip may further include the first set of baseband circuits.
  • the first set of baseband circuits may be configured to, in response to the second reception condition, remain in a reduced-power mode.
  • the RF chip may further include a first interface configured to interface with the baseband chip.
  • the controller may be further configured to, in response to the second reception condition, activate the first interface.
  • the controller may be further configured to, in response to the second reception condition, activate a second interface of the baseband chip.
  • the second interface may be configured to interface with the RF chip.
  • the first reception condition may include one or more of a
  • DRX a first data throughput level less than a threshold, or a PDCCH reception without PDSCH reception.
  • the second reception condition may include one or more of a non-DRX, a second data throughput level greater than or equal to the threshold, or a PDCCH reception with PDSCH reception.
  • the first set of baseband circuits may include a DFE baseband circuit configured to perform first DFE operations. In some embodiments, the first set of baseband circuits may include a CCH receiver configured to perform first CCH operations. [0078] In some embodiments, the first set of baseband circuits may include a cell search circuit configured to perform first cell search operations. In some embodiments, the first set of baseband circuits may include an SCH receiver configured to perform first SCH operations.
  • a method of wireless communication of a user equipment may include performing, by a first set of baseband circuits of an RF chip, first baseband operations in response to a first reception condition.
  • the method may include performing, by a second set of baseband circuits of a baseband chip, second baseband operations in response to a second reception condition.
  • the first baseband operations mays include a subset of the second baseband operations.
  • the method may further include activating, by a controller of the RF chip, the first set of baseband circuits of the RF chip in response to the first reception condition. In some embodiments, the method may further include activating, by the controller of the RF chip, the second set of baseband circuits of the baseband chip in response to the second reception condition.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

Un aspect de la présente divulgation concerne un appareil de communication sans fil d'un équipement utilisateur. L'appareil peut comprendre une puce RF comprenant un premier ensemble de circuits de bande de base. Le premier ensemble de circuits de bande de base peut être conçu pour, en réponse à une première condition de réception, effectuer des premières opérations en bande de base. L'appareil peut comprendre une puce de bande de base comprenant un second ensemble de circuits de bande de base. Le second ensemble de circuits de bande de base peut être conçu pour, en réponse à une seconde condition de réception, effectuer des secondes opérations en bande de base.
PCT/US2021/043064 2021-07-23 2021-07-23 Appareil et procédé de traitement de signal dans une communication sans fil WO2023003571A1 (fr)

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US20140269853A1 (en) * 2013-03-14 2014-09-18 Qualcomm Incorporated Reusing a single-chip carrier aggregation receiver to support non-cellular diversity
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