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WO2017023229A1 - Mesure de l'intensité d'un signal - Google Patents

Mesure de l'intensité d'un signal Download PDF

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Publication number
WO2017023229A1
WO2017023229A1 PCT/US2015/000323 US2015000323W WO2017023229A1 WO 2017023229 A1 WO2017023229 A1 WO 2017023229A1 US 2015000323 W US2015000323 W US 2015000323W WO 2017023229 A1 WO2017023229 A1 WO 2017023229A1
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WO
WIPO (PCT)
Prior art keywords
measurement
optional
user equipment
uplink
signal strength
Prior art date
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Ceased
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PCT/US2015/000323
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English (en)
Inventor
Ralf Bendlin
Jong-Kae Fwu
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Intel IP Corp
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Intel IP Corp
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Filing date
Publication date
Application filed by Intel IP Corp filed Critical Intel IP Corp
Publication of WO2017023229A1 publication Critical patent/WO2017023229A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • Embodiments described herein generally relate to wireless communications. More particularly, but not exclusively, embodiments described herein generally relate to methods and apparatus for measuring signal strength in a predetermined frequency band in order to monitor interference in a wireless communication system.
  • LSA licensed shared access
  • NAPs national regulatory authorities
  • LSA systems differ from state-of-the-art shared communications systems such as WiFi or Bluetooth since the participants are not license exempt. Rather the licenses required to operate in LSA spectrum are not exclusive.
  • LSA systems represent a vast departure
  • LSA systems are hierarchical, i.e., different participants sharing the spectrum have different access priorities: the incumbent user of the spectrum has the highest priority and other licensed users, such as mobile network operators (MNOs) have lower priority.
  • MNOs mobile network operators
  • incumbent users may not want to disclose their current or planned usage of the LSA spectrum for reasons of national security.
  • LSA systems rely on interference self-monitoring whereby users of lower priority monitor the aggregated interference they cause and cease operation if the aggregated interference exceeds a pre-defined threshold in order to protect the incumbent user from harmful interference.
  • Figure 1 is schematic block diagram of a wireless communications network
  • FIG. 1 is schematic block diagram of parts of licensed shared access infrastructure
  • FIG. 3 illustrates components of the wireless communications network
  • Figure 4 is a schematic block diagram illustrating a base station in the wireless communications network
  • Figure 5 is a schematic block diagram illustrating a user equipment
  • Figure 6 depicts a flow diagram of processing operations associated with monitoring interference in the user equipment
  • Figure 7 is a schematic block diagram illustrating data stored in the UE
  • Figure 8 illustrates how a measurement gap spans a number of subframes
  • Figure 9 illustrates time-division duplex uplink/downlink configurations in LTE
  • Figure 10 depicts a flow diagram of processing operations in the user equipment associated with monitoring interference
  • Figure 11 depicts a flow diagram of processing operations in the user equipment associated with monitoring interference
  • Figure 12 depicts a flow diagram of processing operations in the eNodeB associated with monitoring interference
  • Figure 13 shows an example of an exchange of messages between the eNodeB and UE.
  • Figure 14 is a schematic block diagram illustrating some components of the UE.
  • Figure 1 schematically illustrates a licensed shared access wireless
  • the wireless communication network 100 may provide the radio access network (RAN) of a 3rd Generation Partnership Project (3GPP) long-term evolution (LTE) or long-term evolution-advanced (LTE-A) network such as an evolved universal mobile telecommunication system (UMTS) terrestrial radio access network (E- UTRAN).
  • the network 100 has access to shared spectrum not exclusively used by wireless cellular radio access technologies.
  • the communication network comprises a control network 110, a plurality of base stations 120 and a plurality of user equipment (UE) 130.
  • the control network may comprise an evolved packet core (EPC), an operator packet data network and an operator management network.
  • the base stations may comprise evolved node base stations (eNodeBs). They may be fixed or mobile stations/nodes.
  • FIG 1 three base stations 120, BS A, BS B and BS C, are shown.
  • the plurality of UEs may comprise one or more mobile devices or terminals.
  • the eNodeBs are configured to wirelessly communicate with the UEs using signals 140.
  • the network 100 provides radio service coverage over a number of cells formed by the eNodeBs.
  • a UE within a cell, connects to an associated eNodeB and receives and transmits data, including voice data, from and to the network via the eNodeB with which it is connected.
  • the UE 130 may move through the area covered by the network.
  • the UE A When the UE A is within the cell area associated with second eNodeB A, the UE A will transmit data to the network via eNodeB A.
  • the UE A may move to a different position outside of the cell area associated with the eNodeB A, but within the area covered by the eNodeB B.
  • a handover procedure will be initiated such that the UE's connection to the wireless network 100 is via signals 140 (shown with a dashed line) transmitted to eNodeB B.
  • Two or more of the eNodeBs may cover overlapping cell areas such that a UE in the cell area can communicate with two or more eNodeBs.
  • UE C may be able to communicate with both eNodeB B and eNodeB C.
  • the eNodeB that a UE is connected to is referred to as the serving base station for that UE.
  • Parts of the network 100 may be used by a plurality of wireless network operators.
  • Some of the infrastructure provided by the network may be used by only one operator and some of the infrastructure, for example some of the eNodeBs, may be shared by operators.
  • Each operator controls its own public land mobile network (PLMN) which may or may not share radio access network (RAN) infrastructure with another PLMN.
  • PLMN public land mobile network
  • RAN radio access network
  • Each UE has a home PLMN (HPLMN), which is the PLMN in which the user's subscriber profile is held. However, when the UE is outside the coverage of the HPLMN, the UE may connect to a PLMN provided by another operator. This is known as roaming.
  • UE B may need to roam if it moves away from the cell area covered by eNodeB B into a cell area covered by eNodeB A or eNodeB C.
  • the EPC may comprise a mobility management entity (MME), a serving gateway (S-GW), a packet data network gateway (P-GW) and a home subscriber server (HSS).
  • MME mobility management entity
  • S-GW serving gateway
  • P-GW packet data network gateway
  • HSS home subscriber server
  • the components of an EPC will be known by the skilled person and will not be described herein.
  • the EPC may also comprises a licensed shared access controller for allowing the UEs and eNodeBs to access shared spectrum as will be described with respect to Figure 2.
  • the EPC may be connected to external networks including but not limited to an IP multimedia core network subsystem (IMS) and the internet.
  • IMS IP multimedia core network subsystem
  • FIG 2 schematically illustrates network infrastructure 200 for licensed shared access (LSA).
  • LSA licensed shared access
  • Some of the components of the network infrastructure forms part of the control network 110 of Figure 1.
  • a wireless communication network such as the network described with respect to Figure 1
  • one or more incumbents have access to the spectrum used by the wireless communication network.
  • an administrator such a national regulatory authority (NRA) may administer access to the spectrum.
  • the infrastructure may comprise equipment 201 belonging to a national regulatory authority (NRA).
  • the infrastructure may also comprise incumbent equipment 202 belonging to the one or more incumbents, for example the military.
  • the infrastructure may comprise, or interface with, a dedicated sensor network 203.
  • the infrastructure further comprises a plurality of controllers, for example, a global controller 204, provided by a centralized node, and a plurality of private controllers or 'proxies' 205, 206, 207.
  • the private controllers or proxies may belong to the networks that access the LSA spectrum.
  • one of the private controllers 205 may form part of the control network 110 of Figure 1 to allow the UEs in the wireless communication network 100 to access the LSA spectrum.
  • the infrastructure also comprises a repository 208 which stores spectrum usage data for the incumbents and other users.
  • the infrastructure also comprises interfaces 211 , 212, 213 between the repository and the administrator, the incumbents and the sensor network. Additionally, the infrastructure comprises interfaces 214, 215 for allowing the repository and/or the global controller to interface with the private controllers as will be described in more detail below.
  • the infrastructure comprises an interface 216 between the repository 208 and the global controller 204.
  • LSA licensed shared access
  • MNO mobile network operators
  • PAL priority access licensees
  • GAA general authorized access
  • GAA differs from traditional unlicensed technologies such as WiFi, Bluetooth or license-assisted access (LAA) in cellular networks in that the spectrum is not unlicensed, rather, unlicensed user equipment (UE) is allowed to opportunistically use licensed spectrum when it is idle.
  • LAA license-assisted access
  • the repository 208 may be populated by either the national regulatory authority (NRA) or the incumbent itself.
  • the dedicated sensor network 203 can be used to populate the repository 208.
  • the repository could be populated through several means.
  • a NRA may provide a national LSA framework.
  • the incumbents may report their current or planned usage of LSA spectrum directly to the repository and to detect violations or to fill the repository when the incumbent chooses not to provide such information, e.g., for reasons of national security, a sensor network may detect incumbent and PAL spectrum usage and report it to the repository.
  • the repository provisions the necessary interfaces 21 1 , 212, 213 and associated protocols to communicate with the NRA, incumbents or dedicated sensor networks, respectively.
  • the private controllers 205, 206, 207 may be situated in the PAL or GAA domain, in which case each PAL or GAA provisions a private controller.
  • a private controller may also be called a proxy.
  • RAN radio access network
  • PALs this could be an MNO's LTE network, such as the eNodeBs of the wireless communication network of Figure 1
  • GAA this could be a carrier-grade (managed) WiFi network or a license- assisted access (LAA) LTE network.
  • LAA license- assisted access
  • the repository can communicate with one or multiple global controllers via the defined interface and associated protocol 216.
  • the private controllers may have defined interfaces and associated protocols with either the global controllers or the repository or both.
  • a PAL need not communicate with the global controller and
  • GAA infrastructure may only provision an interface and associated protocol 215 to communicate with a global controller, as shown for private controller 207.
  • a private controller may always be required to communicate with both the repository and global controller in which case it would provision
  • a PAL only requires an interface 214 to the repository and GAA only requires interface 5 to the global controller but an MNO may use LSA spectrum both as a PAL and for GAA.
  • time-division duplex (TDD) band 40 in the 2.3- 2.4GHz regime is envisioned for a two-tiered LSA system whereas in the U.S. a three- tiered LSA system called spectrum access system (SAS) is proposed for TDD bands 42/43 in the so-called 3.5GHz band between 3.55GHz and 3.7GHz.
  • the licensed incumbent, in the aforementioned LSA TDD bands includes systems for PMSE services, amateur radio, terrestrial telemetry and aeronautical telemetry and, in the US SAS system, naval radar.
  • LSA licensees of the LSA system in Europe include MNO(s).
  • the PALs of the SAS system in the US may include MNO(s), Hospitals, Public safety systems and local governments.
  • WiFi or LAA systems may be GAA users of the SAS system. In other words, they are unlicensed or opportunistic.
  • LSA licensees and the PALs may obtain licenses by auction.
  • the repository 208 and the controllers 204 to 207 in Figure 2 may be a LSA/SAS repository (LR) or a LSA/SAS controller (LC) respectively.
  • the LSA spectrum may be needed during field exercise and the spectrum may not be available for MNOs in predefined areas and during the period of the field exercise.
  • the field exercise may be known months in advance and may be planned for.
  • the prioritized user is a PMSE user, as is the case for a music festival or a sports event, part of the spectrum may be required in a specific area during a specific time, for instance, to operate wireless microphones or cameras.
  • the spectrum requirements may be stored by the repository 208 and the regulatory framework definitions and the MNO may not need to know the details.
  • the LSA licensees/PALs such as MNOs may take measures to make sure that their respective radio access networks (RANs) carry out self- monitoring to ensure that spectrum left to the incumbent user is not interfered with beyond what is allowed by the instructions of the LSA repository 208 and global controller 204.
  • the private controllers 205, 206, 207 may be operable to control or initiate such measures in their respective networks.
  • a radio access network of a PAL/LSA licensee may be formed by at least the eNodeBs 120 of the wireless communications network 100 of Figure .
  • communications network 100 may be connected to a private LC 205 of the MNO's EPC via an interface 217.
  • the eNodeB may send configuration data to the UE to allow it to carry out signal power measurements, process the measurements and transmit a report if required by the configuration data from the eNodeB, for example if the measured signal power is above a specified threshold.
  • the UE may be configured to receive configuration data from the eNodeB, carry out the measurements and report it back.
  • the eNodeB, the private controller forming part of the control network 110 and/or other parts of the LSA/SAS infrastructure may then take action based on the measurements.
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware.
  • Embodiments described herein may be implemented into a system using any suitably configured hardware and/or software.
  • FIG. 4 illustrates, for one embodiment, example components of an eNodeB, for example, eNodeB A in Figure 1.
  • the eNodeB comprises a wireless transmission block 401 for communicating wirelessly with UEs such as, for example, UEs A, B and C described with respect to Figure 1.
  • the transmission block 401 has an associated antenna 402 and may have a number of antennas for MIMO operation.
  • a network transmission block 403 may be provided, which supports network communications such as communication with the control network 110 and, for example, backhaul
  • the eNodeB can comprise, therefore, a network connection 404 such as, for example, the communication link with the control network 110 described above.
  • a processor 405 is provided for controlling overall operations of the eNodeB.
  • the processor 405 can comprise a number of processors, and/or one or more multi-core processors.
  • the processor 405 operates in accordance with software 406 stored within a processor readable, or processor accessible, memory or storage 407.
  • the software 406 is arranged so that the eNodeB can implement the examples described herein, and, in particular, can implement the eNodeB aspects of the flowcharts and flow diagrams described herein.
  • the memory or storage 407 may store data and software defining routines for implementing sensing, inter-cell interference coordination (ICIC), mobility, access control, radio resource management (RRM) and scheduler functions.
  • the memory may also store elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), and/or radio resource control (RRC) elements.
  • EUTRAN evolved universal terrestrial radio access network
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • Some embodiments relate to enhancements to both the protocol stack and RRM functions as well as the associated procedures at both the eNodeB and/or the UE in order to facilitate interference self-monitoring for incumbent protection in licensed shared access wireless communications systems.
  • Figure 5 illustrates, for one embodiment, example components of a User Equipment (UE) device 130. It may, for example, be the UE A of Figure 1.
  • the UE device 130 may include application circuitry 502, baseband circuitry 504, radio frequency (RF) circuitry 506, front-end module (FEM) circuitry 508 and one or more antennas 510, coupled together at least as shown.
  • the application circuitry 502 may include one or more application processors.
  • the application circuitry 502 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor(s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.).
  • the processors may be coupled with and/or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the system.
  • the baseband circuitry 504 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 504 may include one or more baseband processors and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 506 and to generate baseband signals for a transmit signal path of the RF circuitry 506.
  • Baseband processing circuitry 504 may interface with the application circuitry 502 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 506.
  • the baseband circuitry 504 may include a second generation (2G) baseband processor 504a, third generation (3G) baseband processor 504b, fourth generation (4G) baseband processor 504c, and/or other baseband processor(s) 504d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.).
  • the baseband circuitry 504 e.g., one or more of baseband processors 504a-d
  • the radio control functions may include, but are not limited to, signal
  • modulation/demodulation circuitry of the baseband circuitry 504 may include Fast-Fourier Transform (FFT), precoding, and/or constellation mapping/demapping functionality.
  • encoding/decoding circuitry of the baseband circuitry 504 may include convolution, tail-biting convolution, turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • the baseband circuitry 504 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), and/or radio resource control (RRC) elements.
  • EUTRAN evolved universal terrestrial radio access network
  • a central processing unit (CPU) 504e of the baseband circuitry 504 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers.
  • the baseband circuitry may include one or more audio digital signal processor(s) (DSP) 504f.
  • the audio DSP(s) 504f may include elements for
  • compression/decompression and echo cancellation may include other suitable processing elements in other embodiments.
  • the baseband circuitry 504 may further include memory/storage 504g.
  • the memory/storage 504g may be used to load and store data and/or instructions for operations performed by the processors of the baseband circuitry 504.
  • Memory/storage for one embodiment may include any combination of suitable volatile memory and/or nonvolatile memory.
  • the memory/storage 504g may include any combination of various levels of memory/storage including, but not limited to, read-only memory (ROM) having embedded software instructions (e.g., firmware), random access memory (e.g., dynamic random access memory (DRAM)), cache, buffers, etc.
  • ROM read-only memory
  • DRAM dynamic random access memory
  • the memory/storage 504g may be shared among the various processors or dedicated to particular processors.
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 504 and the application circuitry 502 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 504 may provide for
  • the baseband circuitry 504 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • multi-mode baseband circuitry Embodiments in which the baseband circuitry 504 is configured to support radio communications of more than one wireless protocol.
  • RF circuitry 506 may enable communication with wireless networks
  • the RF circuitry 506 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 506 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 508 and provide baseband signals to the baseband circuitry 504.
  • RF circuitry 506 may also include a transmit signal path which may include circuitry to up- convert baseband signals provided by the baseband circuitry 504 and provide RF output signals to the FEM circuitry 508 for transmission.
  • the RF circuitry 506 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 506 may include mixer circuitry 506a, amplifier circuitry 506b and filter circuitry 506c.
  • the transmit signal path of the RF circuitry 506 may include filter circuitry 506c and mixer circuitry 506a.
  • RF circuitry 506 may also include synthesizer circuitry 506d for synthesizing a frequency for use by the mixer circuitry 506a of the receive signal path and the transmit signal path.
  • the mixer circuitry 506a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 508 based on the synthesized frequency provided by synthesizer circuitry 506d.
  • the amplifier circuitry 506b may be configured to amplify the down-converted signals and the filter circuitry 506c may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • LPF low-pass filter
  • BPF band-pass filter
  • Output baseband signals may be provided to the baseband circuitry 504 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 506a of the receive signal path may comprise passive mixers, although the scope of the
  • the mixer circuitry 506a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 506d to generate RF output signals for the FEM circuitry 508.
  • the baseband signals may be provided by the baseband circuitry 504 and may be filtered by filter circuitry 506c.
  • the filter circuitry 506c may include a low-pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • LPF low-pass filter
  • the mixer circuitry 506a of the receive signal path and the mixer circuitry 506a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and/or upconversion respectively.
  • the mixer circuitry 506a of the receive signal path and the mixer circuitry 506a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
  • the mixer circuitry 506a of the receive signal path and the mixer circuitry 506a may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry 506a of the receive signal path and the mixer circuitry 506a of the transmit signal path may be configured for super-heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 506 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 504 may include a digital baseband interface to communicate with the RF circuitry 506.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry 506d may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 506d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 506d may be configured to synthesize an output frequency for use by the mixer circuitry 506a of the RF circuitry 506 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 506d may be a fractional N/N+1 synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 504 or the applications processor 502 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 502.
  • Synthesizer circuitry 506d of the RF circuitry 506 may include a divider, a delay- locked loop (DLL), a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA).
  • the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry 506d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (f L o)-
  • the RF circuitry 506 may include an IQ/polar converter.
  • FEM circuitry 508 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 510, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 106 for further processing.
  • FEM circuitry 508 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 506 for transmission by one or more of the one or more antennas 510.
  • the FEM circuitry 508 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include a low-noise amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 506).
  • the transmit signal path of the FEM circuitry 508 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 506), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 510.
  • PA power amplifier
  • the UE device 500 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • the electronic device 130 may be configured to perform one or more processes, techniques, and/or methods as described herein, or portions thereof.
  • the UE and the software may implement the examples described herein, and, in particular, can implement the UE aspects of the flowcharts and flow diagrams described herein.
  • Embodiments relate to enhancements to both the protocol stack and RRM functions in order to facilitate interference self-monitoring for incumbent protection in licensed shared access wireless communications systems.
  • Figure 5 may alternatively illustrate, for one embodiment, example components of an eNodeB or some other electronic device in the network.
  • Procedures are available for the UE 130 to monitor the aggregated interference in the downlink and report back to the eNodeB 120, which in turn may report back to the control network 110.
  • the aggregated interference is the sum of the received power from all base stations in the MNO's radio access network (RAN) and will generally depend on the geographic location where it is measured due, for example, to pathloss, shadowing, penetration losses.
  • the UE 130 can report the reference signal received power (RSRP) and reference signal received quality (RSRQ) per cell on a given carrier frequency. These can be used by the network, for example the eNodeB or an LSA controller 205 in the control network 110, to self-monitor the aggregated interference it causes towards a primary user of higher importance, the incumbent, in the
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • a UE 130 may report the aforementioned downlink measurements based on triggers designed for mobility. In legacy systems, these triggers compare measurement results from single cells either relatively among each other or absolutely to configured thresholds.
  • RSRP uplink received signal strength indicator
  • RSRQ radio resource control
  • the LSA system includes mechanisms for interference self-monitoring in the uplink of the LSA system that guarantee that the uplink aggregated interference (or an estimate thereof) does not exceed a predefined threshold in order to protect the incumbent user.
  • 3GPP LTE wireless communications standard as an example (e.g.
  • a UE in the network of Figure 1 can measure the received power P c DL (x) from cell c in the downlink assuming the UE is located at location x and the level of P c DL (x) is larger than the sensitivity of the UE's receiver circuitry. In LTE, this measurement is called the reference signal received power (RSRP) and if the UE is equipped with a standalone GNSS receiver that may be used to provide detailed location information each RSRP measurement report can additionally be tagged with detailed location information providing knowledge of P c DL (x) to the eNodeB.
  • RSRP reference signal received power
  • the UE may signal to the network in the UE-EUTRA-Capability information element (IE) of the RRC protocol that it is equipped with a standalone GNSS receiver by setting the standaloneGNSS-Location field to supported.
  • the network may then instruct the UE to attempt to have detailed location information available using GNSS by configuring the ObtainLocationConfig field in the OtherConfig IE and setting the obtainLocation field to setup.
  • the network configures the UE higher layers, using the RRC protocol, to include the location info in the measurement report by setting the includeLocationlnfo field in the ReportConfigEUTRA IE to true.
  • the UE higher layers upon triggering of a reporting event, finally include the locationlnfo IE in the easResult IE such that each measurement result can be correlated with the UE position information.
  • MDT minimum of drive tests
  • the network Prior to entering RRCJDLE mode, the network can send a LoggedMeasurementConfiguration message to instruct the UE to log measurements.
  • the UE adds logged measurement entries to the UE variable VarLogMeasReport.
  • the UE variable VarLogMeasReport contains the logMeaslntoList field each entry of which, namely, the LogMeaslnfo field, contains the measurement results together with the locationlnfo IE.
  • the UE re-attaches to the network 100, it sets the logMeasAvailable field in the corresponding RRC message (one of
  • the network can subsequently poll the logMeaslntoList by sending the UEInformationRequest message to the UE with the logMeasReportReq field set to true. This triggers the UE to send the logMeaslntoList field in the logMeasReport field in the UEInformationResponse message to the network.
  • the aforementioned RRM procedures and RRC protocol elements were designed under the assumption that the quantity of interest is the received power P c DL (x) in the downlink.
  • P c 0L (x) For example, in RRC_CONNECTED mode where mobility is under complete network control by means of handover procedures, knowledge of P c 0L (x) at the network side ensures that the UE is always connected to the best cell, i.e., the cell with the strongest RSRP or with a favorable cell load. Accordingly, the reporting of P c L (x) is triggered by events based on this quantity.
  • a UE in Figure 1 operating according to the specification set out in 3GPP TS 36.331 would be configured to report its signal strength measurements in the downlink based on the following events:
  • Event A1 Serving becomes better than absolute threshold
  • Event A2 Serving becomes worse than absolute threshold
  • Event A3 Neighbour becomes amount of offset better than PCell/ pSCell
  • Event A4 Neighbour becomes better than absolute threshold
  • Event A6 Neighbour becomes amount of offset better than SCell.
  • the objective of MDT is to guarantee that at any location x the RSRP is of sufficient strength in order to optimize coverage.
  • the quantity of interest is not the received signal strength from a given transmitter such as an eNodeB in the downlink. Rather the quantity of interest is the aggregated interference which is the sum of the received signal powers from N c transmitters in the uplink. According to embodiments described herein, new triggers and associated procedures for the reporting of aggregated interference measurements in the uplink are provided both in RRCJDLE and RRC_CONNECTED mode.
  • the transmit power of a given transmitter namely a UE
  • the transmit power of a UE depends on its location (through the pathloss compensation to the serving cell in the power control procedure), its RRC configuration (through the configured parameters in the power control procedure), and its resource allocation.
  • UEs do not transmit periodic reference signals for the purpose of RRM measurements as base stations do.
  • aggregated interference in uplink subframes cannot be derived from RSRP-like measurements.
  • the UE obtains the new measurement UL RSSI as will be defined herein.
  • the UE is configured with new RRM procedures associated with these measurements.
  • the uplink received signal strength indicator (UL RSSI) measured by the UE is the linear average of the aggregate interference from N c UEs at location x over a period of time.
  • ⁇ is the received power from a given UE c at location l is the aggregated interference from N c UEs at location x then
  • the value o will depend on the maximum transmit power of the given UE,
  • the RRC configuration of the UE governing its uplink power control procedures the uplink resource allocation (in OFDM subcarriers) of UE, the propagation loss between the UE's transmitter and a receiver at location x.
  • the new measurement UL RSSI can be considered to correspond to a linear average of l(x).
  • a linear estimate ) is defined by where N s (x) is
  • the UE is configured to send l(x) to the network and the network can then obtain a linear estimate at a given position x, for example in accordance with the equations above, in the neighbourhood of the location of the UEs that transmitted their measurements.
  • the network can then act on the measurements to protect the incumbent users.
  • Figure 6 illustrates a method 600 performed at the UE according to some embodiments.
  • the UE may be pre-configured with data and instructions for performing signal strength measurements in the uplink.
  • the UE may also be configured by the network.
  • the UE receives 601 new measurement configuration data from the eNodeB.
  • the measurement configuration data may be received in one or more RRC information elements as will be described with respect to various Code Samples below.
  • the UE may store the new measurement configuration data from the eNodeB in memory.
  • the memory may also store measurement configuration data defined by specification.
  • the UE applies 602 the stored measurement configuration data.
  • Applying the measurement configuration data may include discarding a previous measurement setup. It may additionally, or alternatively, also involve determining the start and length of the time period over which the measurement needs to be obtained and preparing for the UE to obtain the measurement. A process for applying the measurement configuration data, according to some embodiments, will be described in more detail with respect to Figure 10.
  • the UE then carries out 603 a measurement according to the measurement configuration data. Specifically, the UE may measures the total received power over a certain time period, corresponding to certain symbols in certain subframes, at a specified bandwidth.
  • the UL RSSI is obtained as the linear average of the received power over the specified time period and measurement bandwidth.
  • the UE then evaluates 604 the measurement according to the configuration data. If the UE determines 605 that the measurement should be reported to the network, it reports 606 the measurement. If it determines that the measurement does not need to be reported, it waits until a new measurement is required according to the existing configuration data or new configuration data is received. In other words, it may receive and apply a new measurement configuration or it may proceed directly to carrying out a new measurement.
  • An example of processes for obtaining, evaluating and reporting the measurement will be described in more detail with respect to Figure 11.
  • any measurement configuration data set by specification and the obtained measurements data may for example be stored in memory 504f in the baseband circuitry. It may alternatively or additionally be stored in another memory area of the UE.
  • one or more processors of the baseband circuitry and/or other circuitry of the UE may implement the operations based on software and data stored in memory and control the RF circuitry 506, FEM circuitry 508 and antenna 510 to obtain the measurement.
  • the measurement configuration data from the network may be communicated using a modified RRC protocol.
  • the UE higher layers may be configured, for example using the RRC layer, to instruct the physical layer to obtain the measurement.
  • the operations described with respect to Figure 6 may form part of other RRM procedures which the UE is configured to perform.
  • the measurement configuration data 701 and obtained measurements 702 is schematically shown.
  • the measurement configuration data may be set by specification or received in information elements defined by a modified RRC protocol stack.
  • the measurement configuration data 701 may include the frequency bandwidth 703, measurement gap data 704 that defines a time window for performing the measurement, filters 705 for evaluating the measurements and reporting data 706 for defining when and how the measurements are reported. Some or all of these parameters may be received from the eNodeB.
  • the measurement data 702 may comprise the UL RSSI measurement 707, obtained according to embodiments herein, and other measurement data 708 and location info 709.
  • the measurement bandwidth 703 is fixed by specification.
  • the measurement bandwidth could equal the uplink transmission bandwidth of the carrier or some other fixed bandwidth common to all specified system bandwidths.
  • the measurement bandwidth is configurable.
  • a new field is added to the RRC protocol which indicates to the UE the allowed measurement bandwidth in the uplink on a certain carrier frequency.
  • the measurement bandwidth is set using a field allowedMeasBandwidthUL-rxy included in the MeasObjectEUTRA IE.
  • MeasObjectEUTRA SEQUENCE ⁇
  • CellsToAddModList :: SEQUENCE (SIZE (L.maxCellMeas)) OF CellsToAddMod
  • BlackCellsToAddModList :: SEQUENCE (SIZE (1..maxCellMeas)) OF
  • MeasSubframeCellList-r10 :: SEQUENCE (SIZE (l.maxCell eas)) OF PhysCellldRange
  • AltTTT-CellsToAddModList-r12 SEQUENCE (SIZE (1..maxCellMeas)) OF AltTTT- CellsToAddMod-r12
  • the UE defaults to a pre-defined measurement bandwidth.
  • the UL RSSI measurement bandwidth 703 is identical to the configured measurement bandwidth for RRM measurements in the downlink.
  • the measurement gap data 704 may define a measurement gap for carrying out the signal power measurement in the uplink.
  • the measurement gap would cover one or more subframes.
  • Measurement gaps are defined as time windows that the UE may use to perform measurements, i.e. no uplink or downlink transmissions are scheduled.
  • the UE may store data that define more than one measurement gap.
  • One or more measurement gaps may be used for downlink measurements. For example, for a UE in RRC_CONNECTED mode, in order to use the same receiver chain for data reception and inter-frequency or inter-RAT measurements while maintaining connection to the serving cell, the eNodeB needs to configure measurement gaps in the UE higher layers that allow the UE physical layer to measure the signal strength in the downlink.
  • a single measurement gap for measuring downlink signal strength is configured per UE even if the UE is equipped with dual radios to allow measurements in frequency bands adjacent to a UE's downlink carriers.
  • MCG master cell group
  • SCG secondary cell group
  • the measurement gap of the SCG is aligned with that for the MCG resulting in a total interruption time of 7ms.
  • a measurement gap for measuring the signal strength in the downlink starts at the end of the latest subframe occurring immediately before the measurement gap and lasts for six subframes.
  • the configuration data may include information 704a defining such a first measurement gap for obtaining signal strength measurements in the downlink.
  • the UE is configured with an additional measurement gap 704b, separate from the measurement gap for obtaining inter-frequency and inter-RAT measurements in the downlink.
  • the UEs can be configured with information about two measurement gaps 704a, 704b.
  • the second measurement gap is provided for carrying out signal strength measurements in uplink subframes.
  • the second measurement gap may be provided for intra-frequency measurements on an activated serving cell and, consequently can be used for uplink signal strength measurement on the uplink frequency of the activated serving cell.
  • the measurement gap will be referred to as the uplink measurement gap.
  • it may be used for inter-frequency uplink measurements.
  • the uplink measurement gap is of fixed length, e.g., through specification.
  • the fixed length may be stored as part of the measurement gap data 704 of the configuration data.
  • the UE may then be configured to measure the UL RSSI per the embodiments herein in all consecutive uplink subframes that are completely covered by the measurement gap.
  • the uplink measurement gap could be configured by the network in a dedicated IE.
  • Code sample 2 below shows an example of structure of a dedicated IE MeasGapConfigUL for configuring the uplink measurement gap in the UE. The UE shall not expect two sets of consecutive uplink subframes that are completely covered by this measurement gap.
  • MeasGapConfigUL :: CHOICE ⁇
  • MeasGapConfigUL can be set to release or to set up. By setting MeasGapConfigUL to release, previously set measurement configuration data can be released. Moreover, MeasGapConfigUL has a field for including a gapOffset parameter gpO or gp1. The field may have an integer value. The gapOffset parameter is used to determine the start, pattern and periodicity of gaps as will be described in more detail with respect to Figure 10. In one example of the embodiment, the new information element (IE) MeasGapConfigUL is included in the legacy
  • MobilityStateParameters MobilityStateParameters
  • MeasldToRemoveList SEQUENCE (SIZE (L.maxMeasld)) OF Measid
  • ReportConfigToRemoveList :: SEQUENCE (SIZE (1..maxReportConfigld)) OF
  • the new MeasGapConfigUL IE can be included in the SCG-Configlnfo-r12-IEs IE as shown in Code Sample 4:
  • radioResourceConfigDedMCG-r12RadioResourceConfigDedicated OPTIONAL sCellToAddModListMCG-r12 SCellToAddModList-r10 OPTIONAL, measGapConfig-r12 MeasGapConfig OPTIONAL, powerCoordi nation I nfo-r 12 PowerCoordinationlnfo-r12 OPTIONAL, scg-RadioConfig-r12 SCG-ConfigPartSCG-n 2 OPTIONAL, eutra-Gapability I nfo-r12 OCTET STRING (CONTAINING UECapabilitylnformation) OPTIONAL,
  • MBMSInterestlndication-r11 OPTIONAL
  • measResultServCellListSCG-r12 MeasResultServCellListSCG-r12 OPTIONAL
  • drb-ToAddModListSCG-r12 DRB-lnfoListSCG-r12
  • the uplink measurement gap may be of configurable length.
  • the eNodeB may configure the length by including a new field in the protocol and the UE may store the configurable length as part of the measurement gap data 704.
  • the UE may measure the UL RSSI per the embodiments herein in all consecutive uplink subframes that are completely covered by said measurement gap.
  • the uplink measurement gap may, for example, be configured by the network as shown in Code Sample 5.
  • the MeasGapConfigUL has a further field, gapLength-rxy, for configuring a gap length. The UE shall not expect two sets of consecutive uplink subframes that are completely covered by this measurement gap.
  • MeasGapConfigUL CHOICE ⁇
  • the network may configure a single uplink subframe for UL RSSI monitoring purposes, i.e., the parameter gapLength-rxy equals one.
  • MeasGapConfigUL IE may be included in the legacy MeasConfig IE.
  • the length of the uplink measurement gap is broadcasted in the system information of the serving cell.
  • a measurement gap 801 is shown covering a number of subframes 802.
  • the measurement gap covers two uplink subframes and based on the measurement gap data in the memory, received from the eNodeB or configured as part of specification, the UL would carry out the uplink signal strength measurement in those two uplinks subframes.
  • a processor of the UE would be configured to determine the subframes in which to carry out the measurement using the gapOffset and the length received from the network.
  • the measurement gap is repeated after a certain time and the gapOffset will also be used to determine the periodicity of the gaps.
  • the measurement may be carried out in specific symbols 803 of the subframes.
  • the UL RSSI is defined as the linear average of the total received power observed in certain uplink symbols of certain measurement subframes in a certain measurement bandwidth.
  • the definition of symbol depends on the chosen modulation for the waveform in the uplink.
  • one symbol may refer to one single-carrier frequency division multiple access (SC-FDMA) symbol.
  • SC-FDMA single-carrier frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • the UE is configured to exclude certain uplink symbols of measurement subframes to allow the radio frequency (RF) circuitry to switch from receiving mode (to perform the measurement) to transmission mode (e.g., to transmit uplink channels) and from transmission mode to receiving mode.
  • Figure 9 summarizes the TDD UL/DL configurations specified in LTE where ⁇ ', 'S', and 'U' denote downlink, special, and uplink subframe, respectively.
  • the shaded stripe in special subframes as well as in uplink subframes preceding downlink subframes denote guard periods that allow the UE receiver circuitry to switch the duplex direction from uplink to downlink and vice versa.
  • a UE shall exclude the first Nswitchi (OFDM/SC-FDMA) symbols of the first subframe of the measurement gap, corresponding to the symbols within a guard period 804 shown in Figure 8, if the first subframe of the measurement gap is an uplink subframe and if the latest subframe occurring immediately before the measurement gap is also an uplink subframe.
  • the UE is configured by the network to use the LTE TDD UUDL configuration 0, assuming the UE is instructed to measure the uplink RSSI in subframe 8, since subframe 7 is an uplink subframe, the UE excludes the first Nswitchi SC-FDMA symbols of subframe 8 in order to allow the UE to transmit in subframe 7 and measure the RSSI in subframe 8.
  • a UE shall exclude the last Nswitch2 (OFDM/SC- FDMA) symbols of the last subframe of the measurement gap if the last subframe of the measurement gap is an uplink subframe and if the first subframe occurring immediately after the measurement gap is also an uplink subframe.
  • Nswitch2 OFDM/SC- FDMA
  • the UE excludes the last Nswitch2 SC-FDMA symbols of subframe 8 in order to allow the UE to transmit in subframe 9 and measure the RSSI in subframe 8.
  • the parameter Nswitch2 can be implicitly configured via the special subframe configuration on the serving cell.
  • the parameter Nswitch2 can be explicitly configured either as part of an information element providing other measurement gap configuration data or as exemplified in Code Sample 6.
  • Nswitch2 may be communicated in a field in the MeasObjectEUTRA IE.
  • the value of Nswitch2 is indicated by the measGuardPeriodUL- rxy field and the field is defined to have one of a number of different set values gpO, gp1 , gp2, gp3, gp4, gp5, gp6, gp7.
  • ASN1 START ASN1 START
  • MeasObjectEUTRA SEQUENCE ⁇
  • CellsToAddModList :: SEQUENCE (SIZE (1..maxCellMeas)) OF CellsToAddMod
  • BlackCellsToAddModList :: SEQUENCE (SIZE (l .maxCellMeas)) OF
  • physCellldRange PhysCellldRange MeasCycleSCell-r10 ENUMERATED ⁇ sf160, sf256, sf320, sf512,
  • MeasSubframePatternConfigNeigh-r10 :: CHOICE ⁇
  • ⁇ easSubframeCellList-r10 :: SEQUENCE (SIZE (L.maxCellMeas)) OF PhysCellldRange
  • AltTTT-CellsToAddModList-r12 SEQUENCE (SIZE (1..maxCellMeas)) OF AltTTT- CellsToAdd od-r12
  • the UE shall not perform UL RSSI measurements in OFDM symbols belonging to the Uplink Pilot Time Slot (UpPTS) region of a special subframe if the special subframe is the last subframe of the measurement gap.
  • UpPTS Uplink Pilot Time Slot
  • the UE can apply Nswitch2 as in uplink subframes. This, however, may degrade the measurement performance of UL RSSI.
  • the parameter Nswitch2 is included in the configuration of the uplink measurement gap as follows, e.g., by means of a new parameter measGuardPeriodUL-rxy, as shown in Code Sample 7 belbw.
  • the measGuardPeriodUL-rxy field is a field in the MeasGapConfigUL IE and can have one of a number of set value gpO, gp1 , gp2, gp3, gp4, gp5, gp6, gp7. - ASN1 START
  • MeasGapConfigUL :: CHOICE ⁇
  • gpo INTEGER (0.. MeasGapConfigUL-l )
  • gpi INTEGER (0.. MeasGapConfigUL2)
  • Nswitchi can be configured in a similar way to Nswitch2.
  • Nswitchi may also be configured using the measGuardPeriodUL-rxy. It will be appreciated that Nswitchi does not have to be equal to Nswitch2 and in other embodiments Nswitchi may be set using a parameter different to the parameter for setting Nswitch2.
  • the UE may store the NSwitchl and NSwitch2 values in the memory as part of the measurement gap data 704.
  • the UE may release the uplink measurement gap configuration upon a successful handover or RRC connection re-establishment procedure.
  • the UE checks 1001 if received measGapConfigUL IE is set to setup. If the measGapConfigUL is not set to setup, in other words it is set to release, the UE releases 1002 the measurement gap configuration in memory set by a previously received measGapConfigUL IE.
  • the UE checks whether the measGapConfigUL is set to setup.
  • the UL measurement gap is already set up and releases 1003 it if it is. It then determines 1004 the start of the measurement gap based on the value of the gapOffset parameter received in the measGapConfigUL IE.
  • the UE determines that the first subframe of each gap occurs at a system frame number (SFN) and subframe meeting the following condition:
  • subframe gapOffset mod 10
  • T MGRP/10 as defined in 3GPP TS 36.133, where the SFN and subframe is the SFN and subframe of the master cell group (MCG) cells and MGRP is the Measurement Gap Repetition Period.
  • MCG master cell group
  • MGRP Measurement Gap Repetition Period.
  • the UE determines 1005 the gap length and any symbols to be excluded from the measurement.
  • the measGapConfigUL IE is set to include a gapLength-rxy parameter, and the parameter has a value, it determines the gap length from the parameter. Otherwise, it uses the gap length set by specification.
  • the measGuardPeriodUL-rxy parameter or other parameter providing values for Nswitchi and/or Nswitch2
  • the parameter has a value
  • the UE then configures 1006 itself to carry out the measurement according to determined gap parameters.
  • the UE may store the determined gap parameters as part of the information about the second gap 704b in the measurement gap data 704.
  • the measurement gap data together with any received or pre-configured frequency bandwidth data, may be used to configure higher layers to instruct the physical layer to measure the signal strength in the relevant symbols covered by the measurement gaps in the frequency bandwidth.
  • the UL measurement gap can be set using other gap parameters and periodicities.
  • New measurement gap patterns can be specified with different periodicities other than those defined in 3GPP TS 36.133 and configured by the value gapOffset which indicates to the UE the gap offset, the gap pattern, and the measurement gap pattern periodicity.
  • legacy measurement gaps can be reused for the purpose of UL RSSI monitoring.
  • a mobile network operator may want to monitor the uplink interference within the exclusion zone of a licensed shared access frequency band. Since there are no active UEs within the exclusion zone on the licensed shared access frequency band itself, the network configures UEs within the exclusion zone that are connected to a serving cell on a different channel that does not operate in licensed shared access to perform UL RSSI measurements in the licensed shared access carrier.
  • a network operator may want to monitor the interference the network creates in uplink subframes in census tracts adjacent to the ones for which the network operator owns a license. To do so, it configures UEs within said census tracts connected to a serving cell on traditionally licensed spectrum to measure the UL RSSI in frequency bands for which the operator has licenses in adjacent census tracts.
  • the network can configure a UE to set up a discovery reference signal measurement timing configuration (DMTC) defined by a period, an offset, and a discovery reference signal (DRS) occasion duration.
  • DMTC discovery reference signal measurement timing configuration
  • TDD time-division duplexing
  • a UE can assume that the secondary
  • a DRS occasion will always contain either subframe #0 or subframe #5 of a radio frame.
  • the DRS occasion will always contain at least one downlink subframe and one special subframe.
  • the DRS occasion will always contain at least one uplink subframe.
  • the total number of uplink subframes in the DRS occasion will generally depend on the TDD UL/DL configuration. This is also true, as is clear from Figure 4, if the DRS occasion starts in subframe #5.
  • the UE is configured to measure the UL RSSI per the embodiments herein in all consecutive uplink symbols of subframes that are completely covered by the DRS occasion.
  • the measurement gap 801 may be the DMTC and the UE may be configured to measure the UL RSSI in the consecutive uplink symbols shown.
  • N 3 and the DRS occasion contains one downlink subframe, one special subframe, and one uplink subframe.
  • the UE can measure the UL RSSI per the embodiments herein in the UpPTS region of the special subframe as well as in the following uplink subframe during the measurement gap explicitly configured by the DMTC.
  • filters 705 and reporting configuration data 706 may also be received from the network.
  • the UE in addition to the measurement definitions and procedures, is configured to follow new reporting procedures for the new UL RSSI measurement.
  • the UE RRM procedures include reporting the UL RSSI measurement in case of an Event U1 corresponding to the UL RSSI being larger than an absolute threshold.
  • ThresholdEUTRA CHOICE ⁇
  • the threshold is defined for the event as part of the ReportConfigEutra information element.
  • the threshold parameter is stored as part of the reporting data 706 of the measurement configuration data 701.
  • the parameter u1-Threshold-rxy in the configuration of the event U1 can be represented by enumeration, i.e., some predefined threshold is mapped to r1 , r2 and r3 as shown in Code Sample 9 below for two bits, however, any number of bits is also possible. In other words, it can only be one out of a number of values instead of a value within a range as in the previous example.
  • Code Sample 9 In addition to configuring the UL RSSI measurement as a new trigger quantity, associated filter coefficients may need to be configured to allow the UE to filter the measurement before using it for evaluation of reporting criteria or for measurement reporting, as will be described in more detail with respect to Figure 11.
  • the filter coefficients are configured in the IE QuantityConfig that specifies the measurement quantities and layer 3 filtering coefficients for E-UTRA as shown in Code Sample 10 below.
  • QuantityConfigEUTRA SEQUENCE ⁇
  • the filter coefficients are stored as part of the filter coefficients 705 of the measurement configuration 701.
  • the UE obtains 1101 the UL RSSI as the linear average of the received power over the specified time period and measurement bandwidth.
  • Obtaining a linear average may include averaging in time and frequency.
  • the linear average may be a linear average over a number of resource elements defined by the number of symbols and the number of subcarriers or tones in the measurement bandwidth.
  • the UE then filters 1102 the obtained UL RSSI measurement.
  • the filtering may include obtaining an updated filtered measurement data based on the current received measurement and a previously received measurement.
  • the evaluation may include layer 3 filtering according to the process described in 3GPP TS 36.311 V12.7.0 (2015-09). Evaluation processes are known and will not be described in detail herein. Briefly, it involves filtering the result using the following formula: where Mn is the latest received measurement result from the physical layer;
  • F n is the updated filtered measurement result, which is used for evaluation of reporting criteria or for measurement reporting;
  • F n -i is the old filtered measurement result, where F 0 is set to M, when the first measurement result from the physical layer is received;
  • a 1/2 (k ) , where k is the filterCoefficient for the corresponding measurement quantity received from the network in the quantityConfig IE.
  • the evaluation may also include further processing of the measurement result.
  • the UE then compares 1103 the filtered UL RSSI to the threshold. If the UE determines 1 104 that the UL RSSI is larger than the threshold, the UE reports 1 105 the UL RSSI to the network. The UE may then wait for the next measurement gap to repeat the process. If the UL RSSI is not larger than the threshold, the UE may not report to the network but will wait for the next measurement gap and repeat the process.
  • the UE may report the measurement according to legacy RRM procedures. This may include transmitting detailed location information together with the measurement reports according to known procedures for other types of measurement.
  • the UE may not carry out all the operations.
  • the UE may not perform filtering. Instead it may compare the measurement directly to the threshold. Moreover, in some embodiments the UE may only report that the UL RSSI exceeded the threshold and may not transmit the actual measurement.
  • the filtered UL RSSI measurement triggers one or more reporting criteria it can be reported to the network by including it into the MeasResults IE.
  • the UL RSSI is reported in a parameter rssiResultUL-rxy in the MeasResults IE as shown in Code Sample 1 1 :
  • MeasResultListEUTRA SEQUENCE (SIZE (1..maxCellReport)) OF MeasResultEUTRA
  • MeasResultEUTRA SEQUENCE ⁇
  • MeasResultServFreq-r10 :: SEQUENCE ⁇
  • MeasResultListUTRA SEQUENCE (SIZE (l.maxCellReport)) OF
  • MeasResultListGERAN SEQUENCE (SIZE (1..maxCellReport)) OF
  • MeasResultGERAN SEQUENCE ⁇
  • MeasResultsCDMA2000 :. SEQUENCE ⁇
  • MeasResultListCDMA2000 :: SEQUENCE (SIZE (1..maxCellReport)) OF
  • MeasResultCDMA2000 :: SEQUENCE ⁇
  • MeasResultForECID-r9 SEQUENCE ⁇
  • PLMN-ldentityList2 SEQUENCE (SIZE (1. 5)) OF PLMN-ldentity
  • the UL RSSI rssiResultUL-rxy is included in the same field as the RSRP or RSRQ in the measResult field of the MeasResultEUTRA IE it is reported for each physical cell ID (PCI) physCellld. If multiple cells, i.e., PCIs, are reported on the same carrier frequency, identical UL RSSI measurements would have to be reported together with each RSRP/RSRQ report on that carrier.
  • the UL RSSI is reported together with a carrier frequency in a new information element as shown in Code Sample 12. As shown in Code Sample 12, the UL RSSI is reported in an IE MeasResult3EUTRA-rxy having a field for indicating the carrier frequency and a field for indicating the UL RSSI for the carrier frequency.
  • a UE may support reporting of multiple UL RSSI measurement reports for a plurality of carrier frequencies. In yet another embodiment, these are reported together and included in the measurement report message as shown in Code Sample 13:
  • MeasResultList3EUTRA-rxy :: SEQUENCE (SIZE (L.maxFreq)) OF
  • the new IE MeasResultList3EUTRA-rxy is included in the
  • the UE may receive the threshold in a LoggedMeasurementConfiguration-vxy-IEs IE.
  • An example of a data structure used for the UE to receive measurement configuration data comprising a
  • LoggedMeasurementConfiguration-vxy-IEs IE with the threshold can be implemented as shown in Code Sample 14: - ASN1 START
  • LoggedMeasurementConfiguration-r10 :: SEQUENCE ⁇
  • LoggedMeasurementConfiguration-r10-IEs :: SEQUENCE ⁇
  • TargetMBSFN-AreaList-r12 TargetMBSFN-AreaList-r12 OPTIONAL, - Need OP nonCriticalExtension LoggedMeasurementConfiguration-vxy-IEs
  • TargetMBSFN-AreaList-r12 SEQUENCE (SIZE (0..maxMBSFN-Area)) OF TargetMBSFN-Area-r12
  • TargetMBSFN-Area-r12 SEQUENCE ⁇
  • the UL RSSI-Range-rxy value is saved in memory as part of the reporting data
  • the UE logs the UL RSSI measurements obtained according to the measurement configuration described herein. In some implementations, it only logs the measurement if it is higher than the threshold. In other implementations, the measurement is logged even if it is not higher than the threshold. During or after RRC connection reconfiguration, RRC connection reestablishment or RRC connection setup, the UE reports the logged UL RSSI measurements to the eNodeB.
  • the UE may initiate a random access (RA) procedure by transmitting on Physical Random Access Channel (PRACH).
  • RA random access
  • PRACH Physical Random Access Channel
  • the UE may then indicate that a LSA event in the uplink has been triggered in the RRCConnectionRequest or the
  • RRCConnectionSetupComplete messages may indicate the
  • the network may then poll the UE to provide the measurement.
  • the UE may be able to indicate in the RRCConnectionSetupComplete message that an LSA event in the uplink has been triggered. This may be achieved by the UE setting a new field associated with an LSA event in the uplink to 'true'.
  • the network would then not need to poll the UE to determine to what the logged measurements relate.
  • the network can poll the UE by sending the UEInformationRequest message to the UE with the logMeasReportReq field set to 'true'. This triggers the UE to send the measurement in the UEInformationResponse message to the network.
  • the UE may include the measurement results in the RRCConnectionSetupComplete message.
  • a new RRCConnectionSetupComplete message may include the measurement results in the RRCConnectionSetupComplete message.
  • the UE may initiate a random access procedure by transmitting a dedicated PRACH preamble indicating to the network that an LSA event in the uplink has been triggered.
  • UEInformationResponse-v1020-IEs SEQUENCE ⁇
  • connEstFailReport-r11 ConnEstFailReport-r11 OPTIONAL nonCriticalExtension UEInformationResponse-v1250-IEs OPTIONAL
  • UEInformationResponse-v1250-IEs SEQUENCE ⁇
  • timeConnFailure-r10 INTEGER (0..1023) OPTIONAL
  • connectionFailureType-r10 ENUMERATED ⁇ rlf, hof ⁇ OPTIONAL
  • previousPCellld-r10 CellGloballdEUTRA OPTIONAL failedPCellld-v1090 SEQUENCE ⁇
  • MeasResultList2EUTRA-r9 SEQUENCE (SIZE (L.maxFreq)) OF
  • MeasResultList2EUTRA-v9e0 SEQUENCE (SIZE (L.maxFreq)) OF
  • MeasResultList2EUTRA-v1250 SEQUENCE (SIZE (L.maxFreq)) OF
  • MeasResultList2UTRA-r9 SEQUENCE (SIZE (L.maxFreq)) OF MeasResult2UTRA- r9
  • MeasResultList2CDMA2000-r9 SEQUENCE (SIZE (L.maxFreq)) OF
  • carrierFreq-r9 CarrierFreqCDMA2000
  • LogMeaslnfoList-r10 SEQUENCE (SIZE (L.maxLogMeasReport-r10)) OF LogMeaslnfo- no
  • measResultListUTRA-r10 MeasResultList2UTRA-r9 OPTIONAL measResultListGERAN-r10 MeasResultList2GERAN-r10 OPTIONAL
  • measResultListCDMA2000-r10 MeasResultList2CDMA2000-r9 OPTIONAL OPTIONAL measResultListCDMA2000-r10 MeasResultList2CDMA2000-r9 OPTIONAL OPTIONAL
  • measResultListMBSFN-r12 MeasResultListMBSFN-r12 OPTIONAL measResultServCell-v1250 RSRQ-Range-v1250 OPTIONAL
  • servCellRSRQ-Type-r12 RSRQ-Type-r12 OPTIONAL measResultListEUTRA-v1250 MeasResultList2EUTRA-v1250 OPTIONAL ]l.
  • MeasResultListMBSFN-r12 SEQUENCE (SIZE (1..maxMBSFN-Area)) OF MeasResultMBSFN-r12
  • MeasResultMBSFN-r12 SEQUENCE ⁇
  • MeasResultList2GERAN-r10 SEQUENCE (SIZE (1..maxCellListGERAN)) OF MeasResultListGERAN
  • TimeSinceFailure-r11 :: INTEGER (0..172800)
  • MobilityHistoryReport-r12 :: VisitedCelllnfoList-r12 - ASN1 STOP
  • UEInformationResponse-v9eO-IEs SEQUENCE ⁇ rlf-Report-v9eO RLF-Report-v9eO OPTIONAL, nonCriticalExtension SEQUENCE ⁇ OPTIONAL
  • MeasResultList2EUTRA-r9 SEQUENCE (SIZE (l.maxFreq)) OF
  • MeasResultList2EUTRA-v9eO :: SEQUENCE (SIZE (L.maxFreq)) OF
  • MeasResultList2EUTRA-v1250 SEQUENCE (SIZE (L.maxFreq)) OF
  • MeasResult2EUTRA-r9 SEQUENCE ⁇
  • MeasResultList2UTRA-r9 SEQUENCE (SIZE (L.maxFreq)) OF MeasResult2UTRA- r9
  • MeasResult2UTRA-r9 SEQUENCE ⁇
  • MeasResultList2CDMA2000-r9 SEQUENCE (SIZE (l.maxFreq)) OF
  • carrierFreq-r9 CarrierFreqCDMA2000
  • LogMeaslnfoList-r10 :. SEQUENCE (SIZE (1..maxLogMeasReport-r10)) OF LogMeaslnfo- r10
  • measResultListUTRA-r10 MeasResultList2UTRA-r9 OPTIONAL measResultListGERAN-r10 MeasResultList2GERAN-r10 OPTIONAL
  • measResultListMBSFN-r12 MeasResultListMBSFN-r12 OPTIONAL measResultServCell-v1250 RSRQ-Range-v1250 OPTIONAL
  • servCellRSRQ-Type-r12 RSRQ-Type-r12 OPTIONAL measResultListEUTRA-v1250 MeasResultList2EUTRA-v1250 OPTIONAL
  • MeasResultListMBSFN-r12 SEQUENCE (SIZE (1..maxMBSFN-Area)) OF MeasResultMBSFN-r12
  • MeasResultMBSFN-r12 SEQUENCE ⁇
  • DataBLER-MCH-ResultList-r12 SEQUENCE (SIZE (1.. maxPMCH-PerMBSFN)) OF DataBLER-MCH-Result-r12 DataBLER-MCH-Result-r12 : SEQUENCE ⁇
  • MeasResultList2GERAN-r10 SEQUENCE (SIZE (1..maxCellListGERAN)) OF Meas ResultListG E RAN
  • measResultListEUTRA-v1130 MeasResultList2EUTRA-v9eO [[ measResultFailedCell-v1250 RSRQ-Range-v1250 OPTIONAL, failedCellRSRQ-Type-r12 RSRQ-Type-r12 OPTIONAL, measResultListEUTRA-v1250 MeasResultList2EUTRA-v1250 OPTIONAL
  • TimeSinceFailure-r11 :: INTEGER (0..172800)
  • the network must take swift actions. For example, the RAN may cease operation on the given carrier frequency in the LSA spectrum. Alternatively, the RAN may disconnect (e.g., handover to another cell) certain UEs to lower the aggregated interference such that no harmful interference is caused to the incumbent. Lastly, in yet another alternative, the RAN may reconfigure the uplink power control parameters and/or procedures of certain UEs also to lower the aggregated interference such that no harmful interference is caused to the incumbent.
  • the eNodeB determines 1201 measurement configuration data.
  • the measurement configuration data may include one or more out of the bandwidth at which the signal strength is to be measured, data for defining the measurement gap, data for indicating symbols to be excluded when the UE obtains the measurement, evaluation parameters for evaluating the measurement and reporting configuration for allowing the UE to report the measurement.
  • the measurement configuration data may be obtained from the control network 110, including a private controller of the licensed shared spectrum infrastructure.
  • the eNodeB is configured to forward data received from the network.
  • the eNodeB processes received data and instructions and selects appropriate values configuration values for the cell.
  • the eNodeB autonomously creates the configuration data for a cell.
  • the eNodeB then sends 1202 the configuration data to UEs in the cell.
  • the eNodeB receives 1203 a measurement from one or more UEs.
  • the eNodeB processes 1204 the measurement and takes 1205 appropriate action.
  • it may for example handover at least some of the connected UEs to another cell or it may reconfigure the uplink power control parameters of at least some of the UEs to lower the aggregated interference such that no harmful interference is caused to the incumbent.
  • the eNodeB sends a signaling message 1301 with configuration data, included in one or more information elements 1302 to the UE and some time later, if an event corresponding to the RSSI measurement exceeding a threshold obtained in the configuration data, the UE reports the event in a reporting message 1303, including one or more other information elements 1304, to the eNodeB.
  • the information elements may include an indication that the threshold was exceeded and/or it may include the actual RSSI value.
  • the measurements and procedures described above may have applications in shared access systems.
  • the radio resources used in the networks will not be exclusively used for wireless cellular radio access technologies.
  • 3GPP Third Generation Partnership Project
  • TSG Technical specification group
  • OAM Operation, Administration and Maintenance
  • FCC Federal Communications Commission
  • some embodiments relate to a new measurement, namely, the UL RSSI as well as several enhancements to the radio resource control (RRC) protocol and associated radio resource management (RRM) functions in order to facilitate interference self-monitoring in the uplink of LTE networks or any other communications system.
  • the new measurement, the UL RSSI can be defined as the received signal strength in uplink subframes.
  • the enhancements to the RRC protocol and associated RRM functions may allow UEs to report aggregated interference measurements during uplink subframes in a time-division duplex (TDD) system.
  • TDD time-division duplex
  • Some embodiments may be grouped into the following three categories: 1.
  • a new measurement definition namely, the aggregated interference in uplink subframes, e.g. an UL RSSI measurement
  • a new measurement gap configuration is described to allow the UE to measure the UL RSSI in UL subframes, i.e., to prevent scheduling of UL transmissions in these subframes
  • DMTC discovery signal measurement timing configuration
  • Some embodiments described herein therefore relate to radio resource management measurement and radio resource control protocol enhancements for the uplink of Licensed Shared Access (LSA) wireless communications systems.
  • LSA Licensed Shared Access
  • the eNodeB and the UE can be implemented in other ways and may comprise alternative or additional components.
  • the UE may comprise one or more user interfaces, one or more peripherial component interfaces and one or more sensors.
  • user interfaces could include, but are not limited to, a display 1302 (e.g., a liquid crystal display, a touch screen display, etc.), a speaker 1304, a microphone 1306, one or more cameras 1308 (e.g., a still camera and/or a video camera), a flashlight (e.g., a light emitting diode flash), and a keyboard 1310, taken jointly and severally in any and all permutations.
  • the peripheral component interfaces may include, but are not limited to, a non-volatile memory port, an audio jack, and a power supply interface.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may interact with, a receiver chain of the UE to receive signals from components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • a positioning network e.g., a global positioning system (GPS) satellite.
  • the UE may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, a mobile phone, etc.
  • the UE may have more or less components, and/or different architectures.
  • the implemented wireless network may be a 3rd Generation
  • LTE long term evolution
  • module may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group) that execute one or more software or firmware instructions and/or programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • processor shared, dedicated, or group
  • memory shared, dedicated, or group
  • Embodiments can be realized in which the embodiments or examples associated with the figures can be taken jointly and severally in any and all permutations.
  • the features of figure 1 , and/or the features of the description of figure 1 can be taken together with the features of figure 2 or the description of figures 2 and so on.
  • the apparatus comprising:
  • a communication module configured to measure received uplink signal strength at a location of the user equipment over a time period and in a frequency bandwidth in accordance with measurement configuration data.
  • Clause 5 Apparatus according to any one of clauses 1 to 4, wherein the frequency bandwidth is configured by the network for a certain carrier frequency.
  • Clause 6 Apparatus according to any one of the preceding clauses, further comprising processing circuitry coupled to the communication module, the processing circuitry being configured to control the communication module in dependence on the measurement configuration data.
  • the measurement configuration data comprises measurement gap data defining a measurement gap comprising said time period and the processing circuitry is configured to control the communication module not to transmit signals to or receive signals from a base station during said measurement gap.
  • Clause 8 Apparatus according to clause 7, wherein the measurement gap data is received from a base station and the communication module is configured to measure the signal strength over one or more uplink subframes within the measurement gap defined by the measurement gap data.
  • the measurement configuration data comprises data defining one or more guard periods for allowing the communication module to switch from receive to transmit mode and/or from transmit to receive mode and the processing circuitry is further configured to select the subset of symbols from the set of symbols to exclude symbols covered by the one or more guard periods.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés et des appareils pour communiquer dans un réseau sans fil comprenant un équipement utilisateur, un appareil selon l'invention comprenant : un module de communication conçu pour mesurer l'intensité d'un signal montant reçu à un emplacement de l'équipement utilisateur sur une période de temps et dans une largeur de bande de fréquence en fonction de données de configuration de mesure.
PCT/US2015/000323 2015-08-04 2015-12-23 Mesure de l'intensité d'un signal Ceased WO2017023229A1 (fr)

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CN108738150A (zh) * 2017-04-18 2018-11-02 宏达国际电子股份有限公司 处理测量间隔的装置及方法
CN108738150B (zh) * 2017-04-18 2022-10-21 宏达国际电子股份有限公司 处理测量间隔的装置及方法
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US11910215B2 (en) 2018-05-30 2024-02-20 China Mobile Communication Co., Ltd Research Institute Information reporting method, information reporting configuration method, user equipment and network side device
CN113038548A (zh) * 2019-12-25 2021-06-25 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN113038548B (zh) * 2019-12-25 2022-09-09 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置

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