WO2021196150A1 - Gestion de réception de signal de liaison descendante - Google Patents

Gestion de réception de signal de liaison descendante Download PDF

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Publication number
WO2021196150A1
WO2021196150A1 PCT/CN2020/083127 CN2020083127W WO2021196150A1 WO 2021196150 A1 WO2021196150 A1 WO 2021196150A1 CN 2020083127 W CN2020083127 W CN 2020083127W WO 2021196150 A1 WO2021196150 A1 WO 2021196150A1
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WIPO (PCT)
Prior art keywords
trp
large scale
ssb
wireless device
scale channel
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PCT/CN2020/083127
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English (en)
Inventor
Muhammad Sayed Khairy Abdelghaffar
Hung Dinh LY
Runxin WANG
Yu Zhang
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Qualcomm Incorporated
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Priority to PCT/CN2020/083127 priority Critical patent/WO2021196150A1/fr
Priority to PCT/CN2021/085291 priority patent/WO2021197474A1/fr
Publication of WO2021196150A1 publication Critical patent/WO2021196150A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0222—Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft

Definitions

  • This disclosure relates generally to wireless devices, and more particularly to enabling wireless devices to manage downlink signal reception.
  • Wireless device that are highly mobile may experience mobility-related effects on wireless communication links, such as Doppler shift and other mobility-related signal distortions.
  • a mobile wireless device receiving signals from two or more spatially separated transmit receive points (TRPs) in a single frequency network (SFN) may face challenges determining adjustments for mobility-related signal distortions from each of the TRPs.
  • a wireless device may receive a tracking reference signal (TRS) port in a combined signal from a first transmit receive point (TRP) and a second TRP.
  • the wireless device may receive a first synchronization signal block (SSB) from the first TRP, and may receive a second SSB from the second TRP.
  • the wireless device may determine a first large scale channel property for the first TRP based on the first SSB and the TRS.
  • the wireless device may determine a second large scale channel property for the second TRP based on the second SSB and the TRS. Based on the respective first large scale channel property and the second large scale channel property, the wireless device may adjust a downlink signal reception from each of the first TRP and the second TRP.
  • adjusting the downlink signal reception may include performing channel estimation of signals from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property.
  • the first large scale property and the second large scale property each may include one or more of Doppler shift, Doppler spread, delay spread, or average delay of a wireless channel between the TRP and the wireless device.
  • the first TRP and the second TRP may be network elements of a single frequency network (SFN) .
  • Some implementations may include obtaining from the TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and a second TCI state identifier associated with the second TRP.
  • TCI transmission control indicator
  • adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property may include adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • Some implementations may include obtaining from the TRS a TCI state that indicates first QCL information including a first downlink reference signal and an associated first QCL type, and second QCL information including a second downlink reference signal and an associated second QCL type.
  • the first QCL information may be associated with the first TRP and the second QCL information may be associated with the second TRP.
  • the first downlink reference signal and the second downlink reference signal each may include a synchronization signal block (SSB) .
  • SSB synchronization signal block
  • adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property may include adjusting a downlink signal reception from the first TRP based on the indicated first QCL information, and from the second TRP based on the indicated second QCL information.
  • the wireless device may receive the first SSB and the second SSB in sequential time occasions.
  • a wireless device may receive a TRS port in a combined signal from a first TRP and a second TRP.
  • the wireless device may receive a combined SSB from the first TRP and the second TRP, and may receive a first SSB associated with the first TRP from the first TRP. Based on the combined SSB and the first SSB; the wireless device may determine (or derive) a second SSB associated with the second TRP.
  • the wireless device may determine a first large scale channel property for the first TRP based on the first SSB and the TRS, and may determine a second large scale channel property for the second TRP based on the second SSB and the TRS. Based on the respective first large scale channel property and the second large scale channel property, the wireless device may adjust a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property.
  • adjusting the downlink signal reception may include performing channel estimation from each of the first TRP and the second TRP based on the respective first large scale channel properties and the second large scale channel properties.
  • the first large scale property and the second large scale property each may include one or more of Doppler shift, Doppler spread, delay spread, or average delay of a wireless channel.
  • the first TRP and the second TRP may be network elements of a single frequency network (SFN) .
  • Some implementations may include obtaining from the TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and the second TRP, and obtaining, from the first TRP, a second TCI state identifier associated with the first TRP.
  • adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property may include adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • Some implementations may include obtaining from the TRS a TCI state that indicates a first downlink reference signal and an associated first QCL type, and obtaining from the first TRP a second downlink reference signal and an associated second QCL type.
  • adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel properties and the second large scale channel properties may include adjusting a downlink signal reception from the first TRP based on the indicated first downlink reference signal and the associated first QCL type, and from the second TRP based on the indicated second downlink reference signal and the associated second QCL type.
  • the first downlink reference signal and the second downlink reference signal each may include a synchronization signal block (SSB) .
  • the wireless device may receive the combined SSB and the first SSB from the TRPs in sequential time occasions.
  • SSB synchronization signal block
  • Further aspects may include an apparatus of a wireless device having a transceiver and a processor configured to perform operations of any of the methods summarized above. Further aspects may include a non-transitory processor-readable storage medium having stored thereon processor-executable instructions configured to cause a processor of a wireless device to perform operations of the methods summarized above. Further aspects include a wireless device having means for performing functions of the methods summarized above. Further aspects include a system on chip for use in a wireless device that includes a processor configured to perform one or more operations of the methods summarized above. Further aspects include a system in a package that includes two systems on chip for use in a wireless device that includes a processor configured to perform one or more operations of the methods summarized above.
  • Figure 1 shows a system block diagram of an example communications system.
  • Figure 2 shows a component block diagram of an example computing system.
  • Figure 3A shows a component block diagram of an example of a software architecture including a radio protocol stack for the user and control planes in wireless communications.
  • Figure 3B shows a block diagram of example SSB transmissions.
  • Figure 3C shows a block diagram of example SSB transmissions.
  • Figure 4 shows a component block diagram of an example system configured to manage transmit power control.
  • Figure 5 shows a process flow diagram of an example method for managing downlink signal reception.
  • Figure 6 shows a process flow diagram of an example method for managing downlink signal reception.
  • FIGS 7A–7F show process flow diagrams of example operations that may be performed as part of the methods for downlink signal reception.
  • Figure 8 shows a component block diagram of an example transmit receive point.
  • Figure 9 shows a component block diagram of an example wireless device.
  • the described implementations may be implemented in any device, system, or network that is capable of transmitting and receiving radio frequency (RF) signals according to any of the Institute of Electrical and Electronics Engineers (IEEE) 16.11 standards, or any of the IEEE 802.11 standards, the standard, code division multiple access (CDMA) , frequency division multiple access (FDMA) , time division multiple access (TDMA) , Global System for Mobile communications (GSM) , GSM/General Packet Radio Service (GPRS) , Enhanced Data GSM Environment (EDGE) , Terrestrial Trunked Radio (TETRA) , Wideband-CDMA (W-CDMA) , Evolution Data Optimized (EV-DO) , 1xEV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA) , High Speed Downlink Packet Access (HSDPA) , High Speed Uplink Packet Access (HSUPA) , Evolved High Speed Packet Access (HSPA+) , Long Term Evolution (L
  • Various implementations enable a wireless device to manage downlink signal reception in a single frequency network (SFN) .
  • SFN single frequency network
  • Some implementations may be usefully deployed in the context of, for example, a high speed train (HST) , or in any other suitable context.
  • HST high speed train
  • 5G NR systems enable beam-sweeping for synchronization signal block (SSB) transmission to improve coverage.
  • a frequency domain allocation of one SSB may consist of four symbols: one primary synchronization signal (PSS) , one secondary synchronization signal (SSS) , and two physical broadcast channel (PBCH) symbols.
  • a time domain allocation of an SSB burst set may be confined to 5 milliseconds (ms) .
  • An SSB burst set periodicity may be set from 5 ms to 150 ms (such as 20 ms, etc. ) .
  • a wireless device may use a quasi co-location (QCL) between multiple reference signal (RS) antenna ports. If two antenna ports are defined as being quasi co-located in terms of delay spread, then the wireless device may determine the delay spread from one antenna port and apply the result to the other antenna port.
  • the wireless device may use a QCL for receiving a physical downlink shared channel (PDSCH) , a physical downlink control channel (PDCCH) , and a channel state information reference signal (CSI-RS) .
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • CSI-RS channel state information reference signal
  • a base station (such as a gNB) may indicate that antenna ports used for an SSB or a CSI-RS have a QCL relationship with antenna ports used to send a PDCCH, PDSCH, or CSI-RS.
  • QCL may assist a wireless device in determining channel characteristics referred to herein as “large scale channel properties. ”
  • Large scale channel properties include Doppler shift, Doppler spread, average delay, delay spread, and spatial receiver parameter.
  • 3GPP standards provide for four types of QCL that indicate large scale channel properties that are common across a set of antenna ports.
  • QCLType A may indicate Doppler shift, Doppler spread, average delay, and delay spread;
  • QCL-Type B may indicate Doppler shift and Doppler spread;
  • QCL-Type C may indicate Doppler shift and average delay; and
  • QCL-Type D may indicate spatial receiver parameters.
  • a Transmission Configuration Indicator may include states (TCI states) that may be dynamically sent by a base station to a wireless device in a Downlink Control Information (DCI) message.
  • the DCI message may include configurations such as QCL-relationships between the DL RSs in one CSI-RS set and PDSCH demodulation reference signal (DMRS) ports.
  • a wireless device may be configured with a list of up to M TCI-state configurations within a parameter (such as a PDSCH-Config parameter) of a higher layer signal (such as an Radio Resource Control (RRC) reconfiguration message) to decode a PDSCH according to a detected PDCCH with DCI intended for the wireless device and a serving cell.
  • RRC Radio Resource Control
  • the RRC configuration message may specify up to 128 TCI states for the PDSCH and up to 64 TCI states for the PDCCH.
  • the base station may indicate an active TCI state to the wireless device via a medium access control-control element (MAC-CE) and the DCI.
  • Each TCI state may include parameters for configuring a QCL relationship between one or two downlink reference signals and the DMRS ports of the PDSCH, the DMRS port of the PDCCH, or the CSI-RS port (s) of a CSI-RS resource.
  • a downlink reference signal (DL RS) may be an SSB or a CSI-RS.
  • Up to 2 QCL relationships can be configured for each TCI state, for example, via a higher layer parameter such as qcl-Type1 for the first DL RS, and such as qcl-Type2 for the second DL RS.
  • the higher layer parameter i.e., qcl-Type1 or qcl-Type2
  • the higher layer parameter may indicate one of the four types of QCL (such as Type-A, Type-B, Type-C, or Type-D) .
  • each DMRS port of a PDSCH may be associated with both TCI state 1 and TCI state 2.
  • a wireless device may experience a high degree of mobility, such as a wireless device on a high speed train (HST)
  • the communication system may deploy a single frequency network (SFN) employing multiple transmit receive points (TRPs) .
  • SFN single frequency network
  • TRPs transmit receive points
  • a wireless device may be served by multiple TRPs concurrently. Due to the high mobility of the wireless device, the downlink signals of each TRP may experience different large scale channel properties. For example, a wireless device on an HST may move rapidly away from a first TRP, and rapidly toward a second TRP, and signals from each of the first TRP and second TRP may demonstrate, for example, different Doppler shift, as well as other large scale channel properties.
  • the wireless device may separately estimate frequency offsets for the two TRPs based on two indicated transmit reference signals (TRS) . Based on two estimated frequency offsets, the wireless device may calculate a proper frequency offset to compensate for channel estimation on the DMRS port.
  • TRS transmit reference signals
  • one TRS port may be combined in a signal from a single frequency network (SFN) and may be transmitted from both the first TRP and the second TRP.
  • SFN single frequency network
  • each TRP may transmit an SSB associated with the transmitting TRP.
  • a single TCI may be configured for the joint transmission (i.e., SFN) .
  • the wireless device may estimate a Doppler profile of each TRP independently from the SSB associated with each TRP.
  • a single-port DMRS may be used in the PDSCH.
  • the wireless device may obtain from the TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and a second TCI state identifier associated with the second TRP.
  • TCI transmission control indicator
  • the first TCI state identifier may be associated with a first quasi-colocation (QCL) source and a first QCL type
  • the second TCI state identifier may be associated with a second quasi-colocation (QCL) source and a second QCL type.
  • the wireless device may adjust a downlink signal reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier. In some implementations, the wireless device may adjust a downlink signal reception of a PDSCH from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • the wireless device may obtain from the TRS a TCI state that indicates a first downlink reference signal and an associated first QCL type, and a second downlink reference signal and an associated second QCL type.
  • the TRS (such as a CSI-RS resource) may be configured to include a reference to multiple TCI-State IDs for providing the QCL sources and QCL types.
  • the reference may include a qcl-InfoPeriodicCSI-RS element that may be configured to include two or more TCI-State IDs.
  • a (non-zero power) nzp-CSI-RS-ResourceToAddModList element may be configured to include the qcl-InfoPeriodicCSI-RS element.
  • one TCI may be configured to indicate two or more downlink reference signals (DL RS) with a corresponding QCL type.
  • a TCI-State may be configured to include a tci-StateID element that includes two or more qcl-Type elements (for example, qcl-Type1, qcl-Type2, and so forth) , each associated with a QCL-Info element.
  • the wireless device may adjust a downlink signal reception from the first TRP based on the indicated first downlink reference signal and the associated first QCL type, and from the second TRP based on the indicated second downlink reference signal and the associated second QCL type. In some implementations, the wireless device may adjust a downlink signal reception of a PDSCH from the first TRP based on the indicated first downlink reference signal and the associated first QCL type, and from the second TRP based on the indicated second downlink reference signal and the associated second QCL type.
  • the large scale channel property may include one or more of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial receiver parameter.
  • the wireless device may determine an offset, a correction, an adjustment value, or some other quantity based on the determined large scale channel property.
  • the wireless device may apply the determined offset, correction, adjustment value, or other quantity to adjust the downlink reception from each of the first TRP and the second TRP.
  • Some implementations may improve the operations of a wireless device and a communication network by enabling the wireless device to more accurately and efficiently perform channel estimates of large scale channel properties to improve downlink signal reception. Some implementations may achieve these improvements without additional signaling overhead, such as DMRS signaling overhead. Some implementations may achieve these improvements without additional TRS overhead. Some implementations may be backward compatible with previous systems or operations, such as systems or devices that implement 3GPP 5G NR standards associated with Release 16.
  • wireless device is used herein to refer to any one or all of wireless router devices, wireless appliances, cellular telephones, smartphones, portable computing devices, personal or mobile multi-media players, laptop computers, tablet computers, smartbooks, ultrabooks, palmtop computers, wireless electronic mail receivers, multimedia Internet-enabled cellular telephones, medical devices and equipment, biometric sensors/devices, wearable devices including smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (such as smart rings, smart bracelets, etc. ) , entertainment devices (such as wireless gaming controllers, music and video players, satellite radios, etc.
  • wireless-network enabled Internet of Things (IoT) devices including smart meters/sensors, industrial manufacturing equipment, large and small machinery and appliances for home or enterprise use, wireless communication elements within autonomous and semiautonomous vehicles, wireless devices affixed to or incorporated into various mobile platforms, global positioning system devices, and similar electronic devices that include a memory, wireless communication components and a programmable processor.
  • IoT Internet of Things
  • SOC system on chip
  • a single SOC may contain circuitry for digital, analog, mixed-signal, and radio-frequency functions.
  • a single SOC also may include any number of general purpose or specialized processors (digital signal processors, modem processors, video processors, etc. ) , memory blocks (such as ROM, RAM, Flash, etc. ) , and resources (such as timers, voltage regulators, oscillators, etc. ) .
  • SOCs also may include software for controlling the integrated resources and processors, as well as for controlling peripheral devices.
  • SIP system in a package
  • a SIP may include a single substrate on which multiple IC chips or semiconductor dies are stacked in a vertical configuration.
  • the SIP may include one or more multi-chip modules (MCMs) on which multiple ICs or semiconductor dies are packaged into a unifying substrate.
  • MCMs multi-chip modules
  • a SIP also may include multiple independent SOCs coupled together via high speed communication circuitry and packaged in close proximity, such as on a single motherboard or in a single wireless device. The proximity of the SOCs facilitates high speed communications and the sharing of memory and resources.
  • FIG. 1 shows a system block diagram illustrating an example communications system 100.
  • the communications system 100 may be an 5G NR network, or any other suitable network such as an LTE network.
  • the communications system 100 may include a heterogeneous network architecture that includes a core network 140 and a variety of mobile devices (illustrated as wireless device 120a-120e in Figure 1) .
  • the communications system 100 also may include a number of base stations (illustrated as the BS 110a, the BS 110b, the BS 110c, and the BS 110d) and other network entities.
  • one or more of the base stations may be configured to function as an uplink receive (UL Rx) point.
  • a base station is an entity that communicates with wireless devices (mobile devices) , and also may be referred to as an NodeB, a Node B, an LTE evolved nodeB (eNB) , an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio base station (NR BS) , a 5G NodeB (NB) , a Next Generation NodeB (gNB) , or the like.
  • Each base station may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a base station, a base station subsystem serving this coverage area, or a combination thereof, depending on the context in which the term is used.
  • a base station 110a-110d may provide communication coverage for a macro cell, a pico cell, a femto cell, another type of cell, or a combination thereof.
  • a macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by mobile devices with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by mobile devices with service subscription.
  • a femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by mobile devices having association with the femto cell (for example, mobile devices in a closed subscriber group (CSG) ) .
  • a base station for a macro cell may be referred to as a macro BS.
  • a base station for a pico cell may be referred to as a pico BS.
  • a base station for a femto cell may be referred to as a femto BS or a home BS.
  • a base station 110a may be a macro BS for a macro cell 102a
  • a base station 110b may be a pico BS for a pico cell 102b
  • a base station 110c may be a femto BS for a femto cell 102c.
  • a base station 110a-110d may support one or multiple (for example, three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not be stationary, and the geographic area of the cell may move according to the location of a mobile base station.
  • the base stations 110a-110d may be interconnected to one another as well as to one or more other base stations or network nodes (not illustrated) in the communications system 100 through various types of backhaul interfaces, such as a direct physical connection, a virtual network, or a combination thereof using any suitable transport network
  • the base station 110a-110d may communicate with the core network 140 over a wired or wireless communication link 126.
  • the wireless device 120a-120e may communicate with the base station 110a-110d over a wireless communication link 122.
  • the wired communication link 126 may use a variety of wired networks (such as Ethernet, TV cable, telephony, fiber optic and other forms of physical network connections) that may use one or more wired communication protocols, such as Ethernet, Point-To-Point protocol, High-Level Data Link Control (HDLC) , Advanced Data Communication Control Protocol (ADCCP) , and Transmission Control Protocol/Internet Protocol (TCP/IP) .
  • wired networks such as Ethernet, TV cable, telephony, fiber optic and other forms of physical network connections
  • wired communication protocols such as Ethernet, Point-To-Point protocol, High-Level Data Link Control (HDLC) , Advanced Data Communication Control Protocol (ADCCP) , and Transmission Control Protocol/Internet Protocol (TCP/IP) .
  • HDMI High-Level Data Link Control
  • ADCCP Advanced Data Communication Control Protocol
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • the communications system 100 also may include relay stations (such as relay BS 110d) .
  • a relay station is an entity that can receive a transmission of data from an upstream station (for example, a base station or a mobile device) and send a transmission of the data to a downstream station (for example, a wireless device or a base station) .
  • a relay station also may be a wireless device that can relay transmissions for other wireless devices.
  • a relay station 110d may communicate with macro the base station 110a and the wireless device 120d in order to facilitate communication between the base station 110a and the wireless device 120d.
  • a relay station also may be referred to as a relay base station, a relay base station, a relay, etc.
  • the communications system 100 may be a heterogeneous network that includes base stations of different types, for example, macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations may have different transmit power levels, different coverage areas, and different impacts on interference in communications system 100. For example, macro base stations may have a high transmit power level (for example, 5 to 40 Watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (for example, 0.1 to 2 Watts) .
  • macro base stations may have a high transmit power level (for example, 5 to 40 Watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (for example, 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of base stations and may provide coordination and control for these base stations.
  • the network controller 130 may communicate with the base stations via a backhaul.
  • the base stations also may communicate with one another, for example, directly or indirectly via a wireless or wireline backhaul.
  • the wireless devices 120a, 120b, 120c may be dispersed throughout communications system 100, and each wireless device may be stationary or mobile.
  • a wireless device also may be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc.
  • a macro base station 110a may communicate with the communication network 140 over a wired or wireless communication link 126.
  • the wireless devices 120a, 120b, 120c may communicate with a base station 110a-110d over a wireless communication link 122.
  • the communication system 100 may include elements deployed to facilitate high wireless device mobility, such as transmit receive points (TRPs) 152, 154.
  • the TRPs 152, 154 may be deployed, for example, as elements of a single frequency network (SFN) .
  • the TRPs 152 and 154 may communicate with a wireless device, for example, on a high speed train 150, using the same frequency, frequency range, or multiple frequency ranges (for example, over wireless communication links 122) .
  • the TRPs 152 and 154 may communicate with the communication network 140 over a wired or wireless communication link 126.
  • the wireless communication links 122, 124 may include a plurality of carrier signals, frequencies, or frequency bands, each of which may include a plurality of logical channels.
  • the wireless communication links 122 and 124 may utilize one or more radio access technologies (RATs) .
  • RATs radio access technologies
  • Examples of RATs that may be used in a wireless communication link include 3GPP LTE, 3G, 4G, 5G (such as NR) , GSM, Code Division Multiple Access (CDMA) , Wideband Code Division Multiple Access (WCDMA) , Worldwide Interoperability for Microwave Access (WiMAX) , Time Division Multiple Access (TDMA) , and other mobile telephony communication technologies cellular RATs.
  • RATs that may be used in one or more of the various wireless communication links 122, 124 within the communication system 100 include medium range protocols such as Wi-Fi, LTE-U, LTE-Direct, LAA, MuLTEfire, and relatively short range RATs such as ZigBee, Bluetooth, and Bluetooth Low Energy (LE) .
  • medium range protocols such as Wi-Fi, LTE-U, LTE-Direct, LAA, MuLTEfire
  • relatively short range RATs such as ZigBee, Bluetooth, and Bluetooth Low Energy (LE) .
  • 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” ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast File 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 also may 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 new radio
  • 5G 5G network
  • NR may utilize OFDM with a cyclic prefix (CP) on the uplink (UL) and downlink (DL) and include support for half-duplex operation using time division duplex (TDD) .
  • CP cyclic prefix
  • TDD time division duplex
  • a single component carrier bandwidth of 100 MHz may be supported.
  • NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 75 kHz over a 0.1 millisecond (ms) duration.
  • Each radio frame may consist of 50 subframes with a length of 10 ms. Consequently, each subframe may have a length of 0.2 ms.
  • Each subframe may indicate a link direction (i.e., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched.
  • Each subframe may include DL/UL data as well as DL/UL control data.
  • Beamforming may be supported and beam direction may be dynamically configured.
  • Multiple Input Multiple Output (MIMO) transmissions with precoding also may be supported.
  • MIMO configurations in the DL may support up to eight transmit antennas with multi-layer DL transmissions up to eight streams and up to two streams per wireless device. Multi-layer transmissions with up to 2 streams per wireless device may be supported. Aggregation of multiple cells may be supported with up to eight serving cells.
  • NR may support a different air interface, other than an OFDM-based air interface.
  • any number of communications systems and any number of wireless networks may be deployed in a given geographic area.
  • Each communications system and wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • RAT also may be referred to as a radio technology, an air interface, etc.
  • a frequency also may be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between communications systems of different RATs.
  • NR or 5G RAT networks may be deployed.
  • FIG. 2 shows a component block diagram of an example computing system 200.
  • Various implementations may be implemented on a number of single processor and multiprocessor computer systems, including a system-on-chip (SOC) or system in a package (SIP) .
  • SOC system-on-chip
  • SIP system in a package
  • the illustrated example computing system 200 (which may be a SIP in some implementations) includes two SOCs 202, 204 coupled to a clock 206, and a voltage regulator 208, and a wireless transceiver 266 configured to send and receive wireless communications via an antenna (not shown) to or from wireless devices, such as a base station 110a.
  • the first SOC 202 may operate as central processing unit (CPU) of the wireless device that carries out the instructions of software application programs by performing the arithmetic, logical, control and input/output (I/O) operations specified by the instructions.
  • the second SOC 204 may operate as a specialized processing unit.
  • the second SOC 204 may operate as a specialized 5G processing unit responsible for managing high volume, high speed (such as 5 Gbps, etc. ) , or very high frequency short wave length (such as 28 GHz mmWave spectrum, etc. ) communications.
  • high speed such as 5 Gbps, etc.
  • very high frequency short wave length such as 28 GHz mmWave spectrum, etc.
  • the first SOC 202 may include a digital signal processor (DSP) 210, a modem processor 212, a graphics processor 214, an application processor 216, one or more coprocessors 218 (such as vector co-processor) connected to one or more of the processors, memory 220, custom circuity 222, system components and resources 224, an interconnection/bus module 226, one or more temperature sensors 230, a thermal management unit 232, and a thermal power envelope (TPE) component 234.
  • DSP digital signal processor
  • modem processor 212 such as graphics processing circuitry
  • application processor 216 such as vector co-processor
  • coprocessors 218 such as vector co-processor
  • the second SOC 204 may include a 5G modem processor 252, a power management unit 254, an interconnection/bus module 264, the plurality of mmWave transceivers 256, memory 258, and various additional processors 260, such as an applications processor, packet processor, etc.
  • Each processor 210, 212, 214, 216, 218, 252, 260 may include one or more cores, and each processor/core may perform operations independent of the other processors/cores.
  • the first SOC 202 may include a processor that executes a first type of operating system (such as FreeBSD, LINUX, OS X, etc. ) and a processor that executes a second type of operating system (such as MICROSOFT WINDOWS 10) .
  • any or all of the processors 210, 212, 214, 216, 218, 252, 260 may be included as part of a processor cluster architecture (such as a synchronous processor cluster architecture, an asynchronous or heterogeneous processor cluster architecture, etc. ) .
  • any or all of the processors 210, 212, 214, 216, 218, 252, 260 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the first SOC 202 or the second SOC 250) .
  • a processing system of the first SOC 202 or the second SOC 250 may refer to a system including the various other components or subcomponents of the first SOC 202 or the second SOC 250.
  • the processing system of the first SOC 202 or the second SOC 250 may interface with other components of the first SOC 202 or the second SOC 250, and may process information received from other components (such as inputs or signals) , output information to other components, etc.
  • a chip or modem of the first SOC 202 or the second SOC 250 may include a processing system, a first interface to output information, and a second interface to receive information.
  • the first interface may refer to an interface between the processing system of the chip or modem and a transmitter, such that the first SOC 202 or the second SOC 250 may transmit information output from the chip or modem.
  • the second interface may refer to an interface between the processing system of the chip or modem and a receiver, such that the first SOC 202 or the second SOC 250 may receive information or signal inputs, and the information may be passed to the processing system.
  • the first interface also may receive information or signal inputs, and the second interface also may transmit information.
  • the first and second SOC 202, 204 may include various system components, resources and custom circuitry for managing sensor data, analog-to-digital conversions, wireless data transmissions, and for performing other specialized operations, such as decoding data packets and processing encoded audio and video signals for rendering in a web browser.
  • the system components and resources 224 of the first SOC 202 may include power amplifiers, voltage regulators, oscillators, phase-locked loops, peripheral bridges, data controllers, memory controllers, system controllers, access ports, timers, and other similar components used to support the processors and software clients running on a wireless device.
  • the system components and resources 224 or custom circuitry 222 also may include circuitry to interface with peripheral devices, such as cameras, electronic displays, wireless communication devices, external memory chips, etc.
  • the first and second SOC 202, 204 may communicate via interconnection/bus module 250.
  • the various processors 210, 212, 214, 216, 218, may be interconnected to one or more memory elements 220, system components and resources 224, and custom circuitry 222, and a thermal management unit 232 via an interconnection/bus module 226.
  • the processor 252 may be interconnected to the power management unit 254, the mmWave transceivers 256, memory 258, and various additional processors 260 via the interconnection/bus module 264.
  • the interconnection/bus module 226, 250, 264 may include an array of reconfigurable logic gates or implement a bus architecture (such as CoreConnect, AMBA, etc. ) . Communications may be provided by advanced interconnects, such as high-performance networks-on chip (NoCs) .
  • NoCs high-performance networks-on chip
  • the first or second SOCs 202, 204 may further include an input/output module (not illustrated) for communicating with resources external to the SOC, such as a clock 206 and a voltage regulator 208.
  • resources external to the SOC such as clock 206, voltage regulator 208 may be shared by two or more of the internal SOC processors/cores.
  • various implementations may be implemented in a wide variety of computing systems, which may include a single processor, multiple processors, multicore processors, or any combination thereof.
  • FIG 3A shows a component block diagram of an example of a software architecture 300 including a radio protocol stack for the user and control planes in wireless communications.
  • the software architecture 300 including a radio protocol stack for the user and control planes in wireless communications between a transmit receive point (TRP) 350 (such as the TRP 152, 154) and a wireless device 320 (such as the wireless device 120a-120e, 200) .
  • TRP transmit receive point
  • the wireless device 320 may implement the software architecture 300 to communicate with the TRP 350 of a communication system (such as the communications system 100) .
  • layers in software architecture 300 may form logical connections with corresponding layers in software of the TRP 350.
  • the software architecture 300 may be distributed among one or more processors (such as the processors 212, 214, 216, 218, 252, 260) . While illustrated with respect to one radio protocol stack, in a multi-SIM (subscriber identity module) wireless device, the software architecture 300 may include multiple protocol stacks, each of which may be associated with a different SIM (such as two protocol stacks associated with two SIMs, respectively, in a dual-SIM wireless communication device) . While described below with reference to LTE communication layers, the software architecture 300 may support any of variety of standards and protocols for wireless communications, or may include additional protocol stacks that support any of variety of standards and protocols wireless communications.
  • processors such as the processors 212, 214, 216, 218, 252, 260
  • the software architecture 300 may include multiple protocol stacks, each of which may be associated with a different SIM (such as two protocol stacks associated with two SIMs, respectively, in a dual-SIM wireless communication device) . While described below with reference to LTE communication layers, the software architecture 300 may support
  • the software architecture 300 may include a Non-Access Stratum (NAS) 302 and an Access Stratum (AS) 304.
  • the NAS 302 may include functions and protocols to support packet filtering, security management, mobility control, session management, and traffic and signaling between a SIM (s) of the wireless device (such as SIM (s) 204) and its core network 140.
  • the AS 304 may include functions and protocols that support communication between a SIM (s) (such as SIM (s) 204) and entities of supported access networks (such as a base station) .
  • the AS 304 may include at least three layers (Layer 1, Layer 2, and Layer 3) , each of which may contain various sub-layers.
  • Layer 1 (L1) of the AS 304 may be a physical layer (PHY) 306, which may oversee functions that enable transmission or reception over the air interface via a wireless transceiver (such as the wireless transceiver 266) .
  • PHY physical layer
  • Examples of such physical layer 306 functions may include cyclic redundancy check (CRC) attachment, coding blocks, scrambling and descrambling, modulation and demodulation, signal measurements, MIMO, etc.
  • the physical layer may include various logical channels, including the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) .
  • PDCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • Layer 2 (L2) of the AS 304 may be responsible for the link between the wireless device 320 and the TRP 350 over the physical layer 306.
  • Layer 2 may include a media access control (MAC) sublayer 308, a radio link control (RLC) sublayer 310, and a packet data convergence protocol (PDCP) 312 sublayer, each of which form logical connections terminating at the TRP 350.
  • MAC media access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • Layer 3 (L3) of the AS 304 may include a radio resource control (RRC) sublayer 3.
  • RRC radio resource control
  • the software architecture 300 may include additional Layer 3 sublayers, as well as various upper layers above Layer 3.
  • the RRC sublayer 313 may provide functions INCLUDING broadcasting system information, paging, and establishing and releasing an RRC signaling connection between the wireless device 320 and the TRP 350.
  • the PDCP sublayer 312 may provide uplink functions including multiplexing between different radio bearers and logical channels, sequence number addition, handover data handling, integrity protection, ciphering, and header compression.
  • the PDCP sublayer 312 may provide functions that include in-sequence delivery of data packets, duplicate data packet detection, integrity validation, deciphering, and header decompression.
  • the RLC sublayer 310 may provide segmentation and concatenation of upper layer data packets, retransmission of lost data packets, and Automatic Repeat Request (ARQ) .
  • ARQ Automatic Repeat Request
  • the RLC sublayer 310 functions may include reordering of data packets to compensate for out-of-order reception, reassembly of upper layer data packets, and ARQ.
  • MAC sublayer 308 may provide functions including multiplexing between logical and transport channels, random access procedure, logical channel priority, and hybrid-ARQ (HARQ) operations.
  • the MAC layer functions may include channel mapping within a cell, de-multiplexing, discontinuous reception (DRX) , and HARQ operations.
  • the software architecture 300 may provide functions to transmit data through physical media
  • the software architecture 300 may further include at least one host layer 314 to provide data transfer services to various applications in the wireless device 320.
  • application-specific functions provided by the at least one host layer 314 may provide an interface between the software architecture and the general purpose processor 206.
  • the software architecture 300 may include one or more higher logical layer (such as transport, session, presentation, application, etc. ) that provide host layer functions.
  • the software architecture 300 may include a network layer (such as Internet Protocol (IP) layer) in which a logical connection terminates at a packet data network (PDN) gateway (PGW) .
  • the software architecture 300 may include an application layer in which a logical connection terminates at another device (such as end user device, server, etc. ) .
  • the software architecture 300 may further include in the AS 304 a hardware interface 316 between the physical layer 306 and the communication hardware (such as one or more radio frequency (RF) transceivers) .
  • RF radio frequency
  • Figure 3B shows a block diagram of example SSB transmissions 360.5G NR systems enable beam-sweeping for synchronization signal block (SSB) block transmission to improve coverage.
  • An SSB burst set periodicity may be set from 5 ms to 150 ms (20 ms may be used as a default value) .
  • SSB transmission may be distributed between a combined transmission or signal (for example, sent by two or more TRPs of an SFN) and a transmission or signal that is not combined and that is sent by one TRP.
  • the TRPs may send, and the wireless device may receive, the combined SSB and the non-combined SSB in sequential time occasions.
  • Figure 3C shows a block diagram of example SSB transmissions 370.
  • Transmission of the SSBs may be configured in a variety of manners.
  • a first TRP and a second TRP may transmit SSBs (such as via DL RS) in sequential time occasions.
  • the first TRP may transmit an SSB (indicated as SSB-TRP1) and the second TRP may transmit an SSB (indicated as SSB-TRP2) one after the other.
  • the first TRP may transmit a group of SSBs (for example, four SSBs indicated as SSB-TRP1)
  • the second TRP may transmit a group of SSBs (for example, four SSBs indicated as SSB-TRP2) interlaced with the group of SSBs transmitted by the first TRP.
  • Other configurations of SSB transmission from the first and second TRPs are also possible.
  • TRPs may send, and the wireless device may receive, the first SSB and the second SSB in sequential time occasions.
  • Figure 4 shows a component block diagram of an example system 400 configured to manage downlink signal reception.
  • the system 400 may include a wireless device 402 (such as 120a-120e, 200, 320) and a TRP 404 (such as 152, 154) .
  • the wireless device 402 may include one or more processors 424 that may be configured by machine-readable instructions 406.
  • Machine-readable instructions 406 may include one or more instruction modules.
  • the instruction modules may include computer program modules.
  • the instruction modules may include one or more of a TRS port receive (Rx) module 408, an SSB module 410, a TCI module 412, a large scale channel property module 414, a downlink (DL) signal adjustment module 416, and other instruction modules.
  • the TRS port receive (Rx) module 408 may be configured to receive a TRS port from a first TRP or a second TRP.
  • the SSB module 410 may be configured to receive a first SSB from the first TRP or a second SSB from the second TRP. In some implementations, the SSB module 410 may configured to receiving a combined SSB, receive a first a first SSB associated with the first TRP, and determine a second SSB associated with the second TRP based on the combined SSB and the first SSB.
  • the TCI module 412 may be configured to obtain from a TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and a second TCI state identifier associated with the second TRP.
  • TCI transmission control indicator
  • the first TCI state identifier may be associated with a first quasi-colocation (QCL) source and a first QCL type
  • the second TCI state identifier may be associated with a second quasi-colocation (QCL) source and a second QCL type.
  • the TCI module 412 may be configured to obtain from the TRS a TCI state that indicates a first downlink reference signal and an associated first QCL type, and a second downlink reference signal and an associated second QCL type
  • the large scale channel property module 414 may be configured to determine one or more large scale channel properties for the first TRP or the second TRP. In some implementations, the large scale channel property module 414 may be configured to determine an offset, a correction, an adjustment value, or some other quantity based on the determined large scale channel property.
  • the downlink (DL) signal adjustment module 416 may be configured to adjust a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property (for example, using one or more determined offsets, corrections, adjustment values, or other quantity) .
  • the DL signal adjustment module 416 may be configured to adjust a downlink signal reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • the DL signal adjustment module 416 may be configured to adjust a downlink signal reception from the first TRP based on the indicated first downlink reference signal and the associated first QCL type, and from the second TRP based on the indicated second downlink reference signal and the associated second QCL type.
  • the wireless device 402 may include an electronic storage 422, one or more processors 424, or other components.
  • the wireless device 402 may include communication lines, or ports to enable the exchange of information with a network or other computing platforms.
  • the illustrations of the wireless device 402 are not intended to be limiting, and the wireless device 402 may include a plurality of hardware, software, or firmware components operating together to provide the functionality attributed herein to the wireless device 402.
  • the electronic storage 422 may include non-transitory storage media that electronically stores information.
  • the storage media of the electronic storage 422 may include one or both of system storage that is provided integrally (i.e., substantially non-removable) with the wireless device 402 or removable storage that is removably connectable to wireless device 402 via, for example, a port (such as a universal serial bus (USB) port, a firewire port, etc. ) or a drive (such as a disk drive, etc. ) .
  • the electronic storage 422 may include one or more of optically readable storage media (such as optical disks, etc. ) , magnetically readable storage media (such as magnetic tape, magnetic hard drive, floppy drive, etc.
  • the electronic storage 422 may include one or more virtual storage resources (such as cloud storage, a virtual private network, or other virtual storage resources) .
  • the electronic storage 422 may store software algorithms, information determined by processor (s) 424, information received from the wireless device 402, information received from the TRP 404, or other information that enables each device to function as described herein.
  • Processor (s) 424 may be configured to provide information processing capabilities in the wireless device 402.
  • processor (s) 424 may include one or more of a digital processor, an analog processor, a digital circuit designed to process information, an analog circuit designed to process information, a state machine, or other mechanisms for electronically processing information.
  • processor (s) 424 are shown as a single entity, this is for illustrative purposes only.
  • processor (s) 424 may include a plurality of processing units. These processing units may be physically located within the same device, or processor (s) 424 8 may represent processing functionality of a plurality of devices operating in coordination.
  • Processor (s) 424 may be configured to execute modules 408–416, or other modules.
  • Processor (s) 424 may be configured to execute modules 408–416, or other modules by software; hardware; firmware; some combination of software, hardware, or firmware; or other mechanisms for configuring processing capabilities on the processor (s) 424.
  • module may refer to any component or set of components that perform the functionality attributed to the module. This may include one or more physical processors during execution of processor readable instructions, the processor readable instructions, circuitry, hardware, storage media, or any other components.
  • modules 408–416 The description of the functionality provided by the different modules 408–416 described below is for illustrative purposes, and is not intended to be limiting, as any of the modules 408–414 and 432–436 may provide more or less functionality than is described. For example, one or more of modules 408–416 may be eliminated, and some or all of its functionality may be provided by other ones of the modules 408–416. As another example, processor (s) 424 may be configured to execute one or more additional modules that may perform some or all of the functionality attributed below to one of the modules 408–416.
  • Figure 5 shows a process flow diagram of an example method 500 for managing downlink signal reception.
  • the operations of the method 500 may be performed by a processor (such as 210, 212, 214, 216, 218, 252, 260, 424) of a wireless device (such as the wireless device 120a-120e, 200, 320, 402) .
  • a processor such as 210, 212, 214, 216, 218, 252, 260, 424
  • a wireless device such as the wireless device 120a-120e, 200, 320, 402 .
  • the processor may receive from a first transmit receive point (TRP) and a second TRP a tracking reference signal (TRS) port in a combined signal.
  • TRP transmit receive point
  • TRS tracking reference signal
  • the processor may receive a signal transmitted from both the first TRP and the second TRP that includes one TRS port.
  • Means for performing functions of the operations in block 502 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the first TRP and the second TRP may be network elements of a single frequency network (SFN) .
  • SFN single frequency network
  • the processor may receive from the first TRP a first synchronization signal block (SSB) .
  • Means for performing functions of the operations in block 504 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may receive from the second TRP a second SSB.
  • Means for performing functions of the operations in block 506 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may determine a first large scale channel property for the first TRP based on the first SSB and the TRS.
  • Means for performing functions of the operations in block 508 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) .
  • the processor may determine a second large scale channel property for the second TRP based on the second SSB and the TRS.
  • Means for performing functions of the operations in block 510 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) .
  • the processor may adjust adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property. In some implementations, the processor may adjust a downlink reception of a PDSCH from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property. In some implementations, the processor may perform channel estimation of signals from each of the first TRP and the second TRP based on the respective first large scale channel properties and the second large scale channel properties. In some implementations, the first large scale property and the second large scale property each include one or more of Doppler shift, Doppler spread, delay spread, or average delay. Means for performing functions of the operations in block 512 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • a wireless transceiver such as the wireless transceiver 26
  • the processor may again perform the operations of determination block 502 as described.
  • Figure 6 shows a process flow diagram of an example method 600 for managing downlink signal reception.
  • the operations of the method 600 may be performed by a processor (such as 210, 212, 214, 216, 218, 252, 260, 424) of a wireless device (such as the wireless device 120a-120e, 200, 320, 402) .
  • a processor such as 210, 212, 214, 216, 218, 252, 260, 424
  • a wireless device such as the wireless device 120a-120e, 200, 320, 402 .
  • the processor may receive from a first transmit receive point (TRP) and a second TRP a tracking reference signal (TRS) port in a combined signal.
  • TRP transmit receive point
  • TRS tracking reference signal
  • the processor may receive a signal transmitted from both the first TRP and the second TRP that includes one TRS port.
  • Means for performing functions of the operations in block 602 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the first TRP and the second TRP may be network elements of a single frequency network (SFN) .
  • SFN single frequency network
  • the processor may receive from the first TRP and the second TRP a combined synchronization signal block (SSB) .
  • Means for performing functions of the operations in block 604 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may receive from the first TRP a first SSB associated with the first TRP.
  • the first TRP may transmit the combined SSB and the first SSB that is associated only with the first TRP.
  • the second TRP may transmit only the combined SSB.
  • Means for performing functions of the operations in block 606 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may determine a second SSB associated with the second TRP based on the combined SSB and the first SSB. In some implementations, based on the combined SSB and the first SSB; the processor may determine (or derive) a second SSB that is associated with the second TRP. In such implementations, the second TRP does not need to transmit the second SSB.
  • Means for performing functions of the operations in block 608 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) .
  • the processor may determine a first large scale channel property for the first TRP based on the first SSB and the TRS.
  • Means for performing functions of the operations in block 610 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) .
  • the processor may determine a second large scale channel property for the second TRP based on the second SSB and the TRS.
  • Means for performing functions of the operations in block 612 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) .
  • the processor may adjust adjusting a downlink signal reception from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property.
  • the processor may adjust a downlink reception of a PDSCH from each of the first TRP and the second TRP based on the respective first large scale channel property and the second large scale channel property.
  • Means for performing functions of the operations in block 614 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may again perform the operations of determination block 602 as described.
  • Figures 7A–7F are process flow diagrams illustrating operations 700a–700f that may be performed by a processor of a wireless device as part of the methods 500 or 600 for managing beam failure recovery.
  • the operations 700a–700f may be performed by a processor of a wireless device (such as the wireless device 120a-120e, 200, 320, 402) .
  • the processor may obtain from the TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and a second TCI state identifier associated with the second TRP in block 702.
  • TCI transmission control indicator
  • the first TCI state identifier may be associated with a first quasi-colocation (QCL) source and a first QCL type
  • the second TCI state identifier may be associated with a second quasi-colocation (QCL) source and a second QCL type.
  • Means for performing functions of the operations in block 702 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 504 ( Figure 5) .
  • the processor may adjust a downlink signal reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier in block 704.
  • the wireless device may determine and apply an offset, correction, adjustment value, or other quantity to adjust the downlink reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • Means for performing functions of the operations in block 704 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 502 ( Figure 5) or block 602 ( Figure 6) as described.
  • the processor may obtain from the TRS a TCI state that indicates first QCL information that includes a first downlink reference signal and an associated first QCL type, and second QCL information that includes a second downlink reference signal and an associated second QCL type in block 706.
  • first QCL information may be associated with the first TRP and the second QCL information may be associated with the second TRP.
  • the first downlink reference signal and the second downlink reference signal may each include a synchronization signal block (SSB) .
  • Means for performing functions of the operations in block 706 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 504 ( Figure 5) as described.
  • the processor may adjust a downlink signal reception from the first TRP based on the indicated first downlink reference signal and the associated first QCL type, and from the second TRP based on the indicated second downlink reference signal and the associated second QCL type in block 708.
  • the wireless device may determine and apply an offset, correction, adjustment value, or other quantity to adjust the downlink reception from each of the first TRP and the second TRP based on the respective first TCI state identifier and the second TCI state identifier.
  • Means for performing functions of the operations in block 708 may include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 504 ( Figure 5) or block 604 ( Figure 6) as described.
  • the processor may obtain from the TRS a first transmission control indicator (TCI) state identifier associated with the first TRP and the second TRP in block 710.
  • TCI transmission control indicator
  • Means for performing functions of the operations in block 710 include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may obtain, from the first TRP, a second TCI state identifier associated with the first TRP.
  • Means for performing functions of the operations in block 712 include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 608 ( Figure 6) as described.
  • the processor may obtain obtaining from the TRS a TCI state that indicates a first downlink reference signal and an associated first QCL type in block 714.
  • Means for performing functions of the operations in block 714 include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may obtain from the first TRP a second downlink reference signal and an associated second QCL type.
  • Means for performing functions of the operations in block 716 include the processor (such as 210, 212, 214, 216, 218, 252, 260, 424) coupled to a wireless transceiver (such as the wireless transceiver 266) .
  • the processor may then perform the operations of block 608 ( Figure 6) as described.
  • FIG 8 shows a component block diagram of an example of a transmit receive point (TRP) 800.
  • the TRP 800 may function as a network element of a communication network, such as a base station (for example, the base station 110a-110d, 350) .
  • the TRP 800 may include a processor 801 coupled to volatile memory 802 and a large capacity nonvolatile memory, such as a disk drive 803.
  • the TRP 800 also may include a peripheral memory access device such as a floppy disc drive, compact disc (CD) or digital video disc (DVD) drive 806 coupled to the processor 801.
  • the TRP 800 also may include network access ports 804 (or interfaces) coupled to the processor 801 for establishing data connections with a network, such as the Internet or a local area network coupled to other system computers and servers.
  • the TRP 800 may include one or more antennas 807 for sending and receiving electromagnetic radiation that may be connected to a wireless communication link.
  • the TRP 800 may include additional access ports, such as USB, Firewire, Thunderbolt, and the like for coupling to peripherals, external memory, or other devices.
  • FIG. 9 shows a component block diagram of an example wireless device 900.
  • the wireless device 900 (such as the wireless device 120a-120e, 200, 320, 404) may be a device suitable for implementing various implementations, such as a mobile device.
  • the wireless device 900 may include a first SOC 202 (such as a SOC-CPU) coupled to a second SOC 204 (such as a 5G capable SOC) .
  • the first and second SOCs 202, 204 may be coupled to internal memory 422, 916, a display 912, and to a speaker 914.
  • the wireless device 900 may include an antenna 904 for sending and receiving electromagnetic radiation that may be connected to a wireless data link or cellular telephone transceiver 908 coupled to one or more processors in the first or second SOCs 202, 204.
  • the wireless device 900 may include menu selection buttons or rocker switches 920 for receiving user inputs.
  • the wireless device 900 also may include a sound encoding/decoding (CODEC) circuit 910, which digitizes sound received from a microphone into data packets suitable for wireless transmission and decodes received sound data packets to generate analog signals that are provided to the speaker 914 to generate sound.
  • CODEC sound encoding/decoding
  • One or more of the processors in the first and second SOCs 202, 204, wireless transceiver 908 and CODEC 910 may include a digital signal processor (DSP) circuit (not shown separately) .
  • DSP digital signal processor
  • the processors of the TRP 800 and the wireless device 900 may be any programmable microprocessor, microcomputer or multiple processor chip or chips that can be configured by processor-executable instructions to perform a variety of functions, including the functions of the various implementations described herein.
  • multiple processors may be provided, such as one processor within an SOC 204 dedicated to wireless communication functions and one processor within an SOC 202 dedicated to running other applications.
  • Software applications may be stored in the memory 422, 802, 916 before they are accessed and loaded into the processor.
  • the processors may include internal memory sufficient to store the application software instructions.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, or a computer.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, or a computer.
  • an application running on a wireless device and the wireless device may be referred to as a component.
  • One or more components may reside within a process or thread of execution and a component may be localized on one processor or core or distributed between two or more processors or cores. In addition, these components may execute from various non-transitory computer readable media having various instructions or data structures stored thereon. Components may communicate by way of local or remote processes, function or procedure calls, electronic signals, data packets, memory read/writes, and other known network, computer, processor, or process related communication methodologies.
  • Such services and standards include, such as third generation partnership project (3GPP) , long term evolution (LTE) systems, third generation wireless mobile communication technology (3G) , fourth generation wireless mobile communication technology (4G) , fifth generation wireless mobile communication technology (5G) , global system for mobile communications (GSM) , universal mobile telecommunications system (UMTS) , 3GSM, general packet radio service (GPRS) , code division multiple access (CDMA) systems (such as cdmaOne, CDMA1020TM) , enhanced data rates for GSM evolution (EDGE) , advanced mobile phone system (AMPS) , digital AMPS (IS-136/TDMA) , evolution-data optimized (EV-DO) , digital enhanced cordless telecommunications (DECT) , Worldwide Interoperability for Microwave Access (WiMAX) , wireless local area network (WLAN) , Wi-Fi Protected
  • 3GPP third generation wireless mobile communication technology
  • 4G fourth generation wireless mobile communication technology
  • 5G fifth generation wireless mobile communication technology
  • 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.
  • the hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single-or multi-chip processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine.
  • a processor also may be implemented as a combination, such as 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.
  • particular processes and methods may be performed by circuitry that is specific to a given function.
  • the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents thereof, or in any combination thereof. Implementations of the subject matter described in this specification also can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions, encoded on a computer storage media for execution by, or to control the operation of, data processing apparatus.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program from one place to another.
  • a storage media may be any available media that may be accessed by a computer.
  • such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer.
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc 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. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine readable medium and computer-readable medium, which may be incorporated into a computer program product.

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

Abstract

La présente invention concerne des systèmes, des procédés et des appareils, y compris des programmes informatiques codés sur des supports de stockage informatiques, pour gérer la réception de signal de liaison descendante. Selon un aspect, un dispositif sans fil peut recevoir, d'un premier point de réception de transmission (TRP) et d'un second TRP, un port de signal de référence de suivi (TRS) dans un signal combiné. Le dispositif sans fil peut recevoir un premier bloc de signal de synchronisation (SSB) provenant du premier TRP et un second SSB à partir du second TRP. Dans certains modes de réalisation, le dispositif sans fil peut déterminer un SSB pour le second TRP sur la base d'un SSB combiné et d'un SSB associé au premier TRP. Le dispositif sans fil peut déterminer une propriété de canal à grande échelle pour chaque TRP sur la base du TRS et des SSB respectifs, et peut ajuster une réception de signal de liaison descendante à partir de chacun du premier TRP et du second TRP sur la base des propriétés de canal à grande échelle respectives.
PCT/CN2020/083127 2020-04-03 2020-04-03 Gestion de réception de signal de liaison descendante WO2021196150A1 (fr)

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