WO2017171746A1 - Mesure de signal de référence et d'interférence pour un planificateur joint dans des systèmes cellulaires en duplex intégral - Google Patents

Mesure de signal de référence et d'interférence pour un planificateur joint dans des systèmes cellulaires en duplex intégral Download PDF

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WO2017171746A1
WO2017171746A1 PCT/US2016/024897 US2016024897W WO2017171746A1 WO 2017171746 A1 WO2017171746 A1 WO 2017171746A1 US 2016024897 W US2016024897 W US 2016024897W WO 2017171746 A1 WO2017171746 A1 WO 2017171746A1
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WIPO (PCT)
Prior art keywords
ues
signal
csi
reserved resource
resource elements
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PCT/US2016/024897
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English (en)
Inventor
Ping Wang
Sung-En Chiu
Jingwen BAI
Shu-Ping Yeh
Feng Xue
Yang-Seok Choi
Shilpa Talwar
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Intel Corporation
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Priority to CN201680083340.2A priority Critical patent/CN109565382B/zh
Priority to PCT/US2016/024897 priority patent/WO2017171746A1/fr
Publication of WO2017171746A1 publication Critical patent/WO2017171746A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • 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
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • the present disclosure relates to full-duplex cellular systems and, in particular to an apparatus and a method for generating a reference signal and performing interference measurement in full-duplex cellular systems.
  • Capacity in wireless communication networks is limited by the radio spectrum available.
  • the capacity of a wireless communication network therefore, depends on efficient use of the available radio spectrum.
  • Traditionally, cellular systems utilize half- duplex operation where orthogonal radio resources (orthogonal in time or in frequency) are allocated for downlink (from base station (BS) to user equipment (UE)) and uplink (from UE to BS) transmissions.
  • Full-duplex systems allow simultaneous transmit and receive (STR) in the same frequency band at the same time, which increases the physical layer capacity.
  • an uplink (UL) signal from the UE may interfere with downlink (DL) signals intended for nearby UEs, causing UE-to-UE interference and a DL signal to the UE may be corrupted by proximate UL signals from nearby UEs.
  • DL downlink
  • any proximate UE pairs may interfere with each other resulting in loss of DL capacity.
  • FIG. 1 depicts a simplified block diagram of a full-duplex cellular system, that enables to establish a UE-to-UE interference measurement method, according to one embodiment of the disclosure.
  • Fig. 2 depicts an LTE orthogonal frequency division multiplexing (OFDM) subframe, comprising interference measurement reference signal (IM-RS) reserved resource elements, according to one embodiment of the disclosure.
  • Fig. 3 depicts a simplified block diagram of a full-duplex cellular system, that enables to establish UE-to-UE interference measurement utilizing a channel state information measurement (CSI-IM), according to one embodiment of the disclosure.
  • OFDM orthogonal frequency division multiplexing
  • IM-RS interference measurement reference signal reserved resource elements
  • Fig. 4 depicts an LTE orthogonal frequency division multiplexing (OFDM) subframe, comprising channel state information measurement (CSI-IM) reserved resource elements, according to one embodiment of the disclosure.
  • OFDM orthogonal frequency division multiplexing
  • FIG. 5 illustrates a block diagram of an apparatus for use in an eNodeB of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • FIG. 6 illustrates a block diagram of an apparatus for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • UL uplink
  • UE user equipment
  • Fig. 7 illustrates a block diagram of an apparatus 700 for use in a downlink (DL) user equipment (UE) of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • DL downlink
  • UE user equipment
  • FIG. 8 illustrates a flowchart of a method for an eNodeB in a full-duplex cellular network, that facilitates interference measurement using interference
  • IM-RS measurement reference signal
  • Fig. 9 illustrates a flowchart of a method for an eNodeB in a full-duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM) reserved resource elements, according to one embodiment of the disclosure.
  • CSI-IM channel state information measurement
  • Fig. 1 0 illustrates a flowchart of a method for an uplink (UL) user equipment (UE) in a full-duplex cellular network, that facilitates interference measurement using interference measurement reference signal (IM-RS), according to one embodiment of the disclosure.
  • UL uplink
  • UE user equipment
  • IM-RS interference measurement reference signal
  • Fig. 1 1 illustrates a flowchart of a method for an uplink (UL) user equipment (UE) in a full-duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM) reserved resource elements, according to one embodiment of the disclosure.
  • UL uplink
  • UE user equipment
  • CSI-IM channel state information measurement
  • FIG. 1 2 illustrates a flowchart of a method for a downlink (DL) user equipment (UE) in a full-duplex cellular network, that facilitates interference measurement using interference measurement reference signal (IM-RS), according to one embodiment of the disclosure.
  • DL downlink
  • UE user equipment
  • IM-RS interference measurement reference signal
  • Fig. 1 3 illustrates a flowchart of a method for a downlink (DL) user equipment (UE) in a full-duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM) reserved resource elements, according to one embodiment of the disclosure.
  • DL downlink
  • UE user equipment
  • CSI-IM channel state information measurement
  • Fig. 14 illustrates, for one embodiment, example components of a User Equipment (UE) device.
  • UE User Equipment
  • an apparatus for use in an eNodeB of a full duplex cellular network that facilitates interference measurement using interference measurement reference signals (IM-RS) is disclosed.
  • the apparatus comprises a memory circuit configured to store information comprising a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the
  • predetermined IM-RS reserved resource element allocation comprises a plurality of IM- RS reserved resource elements employed for transmitting IM-RS reference signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network.
  • the apparatus further comprises a processing circuit configured to generate a UE configuration signal comprising information on one or more reserved resource elements of the plurality of reserved resource elements to be utilized for transmitting IM- RS reference signals associated with the one or more UL UEs; and transmit the UE configuration signal to the one or more UL UEs in the cellular network via a transmit circuit.
  • the UE configuration signal is configured to configure the one or more UL UEs to generate a respective unique IM-RS reference signal associated with the one or more UL UEs, wherein the generated respective unique IM-RS reference signal is subsequently utilized for transmission by the one or more UL UEs using the one or more reserved resource elements of the plurality of reserved resource elements dictated by the UE configuration signal.
  • an apparatus for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using interference measurement reference signals (IM-RS) comprises a memory circuit configured to store information on a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the predetermined IM-RS reserved resource element allocation comprises information on a plurality of IM-RS reserved resource elements employed for
  • the apparatus further comprises a processing circuit configured to receive a UE configuration signal comprising information on one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements to be utilized for transmitting an IM-RS reference signal associated with the UL UE, from an eNodeB via a receive circuit, wherein the UE configuration signal configures the UL UE to generate the IM-RS reference signal associated with the UL UE.
  • the processing circuit is further configured to generate the IM-RS reference signal based on the received UE
  • apparatus for use in a downlink (DL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using interference measurement reference signals (IM-RS) is disclosed.
  • the apparatus comprises a memory circuit configured to store information comprising a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the predetermined IM-RS reserved resource element allocation comprises a plurality of IM-RS reserved resource elements employed for transmitting IM-RS reference signals associated with a plurality of UL UEs in the cellular network.
  • the apparatus further comprises a processing circuit configured to receive a downlink signal comprising information on one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals from one or more UL UEs of the plurality of UL UEs, from an eNodeB via a receive circuit and receive the IM-RS reference signals associated with the one or more UL UEs, transmitted using the one or more reserved resource elements of the plurality of reserved resource elements of the LTE frame structure, in response to receiving the downlink signal.
  • a processing circuit configured to receive a downlink signal comprising information on one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals from one or more UL UEs of the plurality of UL UEs, from an eNodeB via a receive circuit and receive the IM-RS reference signals associated with the one or more UL UEs, transmitted using the one or more reserved resource elements of the
  • the processing circuit is further configured to determine an interference power associated with the IM-RS reference signals received from the one or more UL UEs, based on the received IM-RS reference signals; and transmit the determined interference power to the eNodeB, via a transmit circuit.
  • apparatus for use in an eNodeB of a full duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM) is disclosed.
  • the apparatus comprises a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI- IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network.
  • CSI-IM channel state information measurement
  • the apparatus further comprises a processing circuit configured to generate a UE configuration signal comprising information on one or more reserved resource elements of the plurality of CSI-IM reserved resource elements to be utilized for transmitting the CSI-IM reference signals or data signals associated with the one or more UL UEs.
  • the processing circuit is further configured to transmit the UE
  • the UE configuration signal to a select UL UE of the one or more UL UEs in the cellular network via a transmit circuit, wherein the UE configuration signal is configured to configure the select UE to selectively generate a CSI-IM reference signal or a data signal associated with the select UL UE.
  • the generated CSI-IM reference signal or the data signal is subsequently utilized for transmission by the select UE using the one or more reserved resource elements of the plurality of reserved resource elements dictated by the UE configuration signal.
  • apparatus for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates interference
  • the apparatus comprises a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI-IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network.
  • CSI-IM channel state information measurement
  • the apparatus further comprises a processing circuit configured to receive a UE configuration signal comprising information on one or more CSI-IM reserved resource elements of the plurality of CSI- IM reserved resource elements to be utilized for transmitting a CSI-IM reference signal or a data signal associated with the UL UE, from an eNodeB via a receive circuit, wherein the UE configuration signal configures the UL UE to selectively generate the CSI-IM reference signal or the data signal associated with the UL UE.
  • the processing circuit is further configured to generate the CSI-IM reference signal or the data signal, in response to receiving the UE configuration signal and transmit the generated CSI-IM reference signal or the data signal via a transmit circuit, using the one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements dictated by the UE configuration signal.
  • an apparatus for use in a downlink (DL) user equipment (UE) of a full duplex cellular network that facilitates interference measurement using channel state information measurement (CSI-IM) is disclosed.
  • the apparatus comprises a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI-IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network.
  • the apparatus further comprises a processing circuit configured to receive a downlink signal comprising information on one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements utilized for transmitting a CSI-IM reference signal associated with a select UL UE or data signals from one or more UL UEs of the plurality of UL UEs, from an eNodeB via a receive circuit.
  • the processing circuit is further configured to receive the CSI-IM reference signal associated with the select UE or the data signals associated with the one or more UL UEs, transmitted using the one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements of the LTE frame structure, in response to receiving the downlink signal.
  • the processing circuit is configured to determine an interference power associated with the CSI-IM reference signal received from the select UE or the data signals received from the one or more UL UEs.
  • a component can be a processing circuit (e.g., a microprocessing circuit, a controller, or other processing device), a process running on a processing circuit, a controller, an object, an executable, a program, a storage device, a computer, a tablet PC and/or a user equipment (e.g., mobile phone, etc.) with a processing device.
  • a processing circuit e.g., a microprocessing circuit, a controller, or other processing device
  • a process running on a processing circuit e.g., a controller, or other processing device
  • an object running on a server and the server
  • a user equipment e.g., mobile phone, etc.
  • an application running on a server and the server can also be a component.
  • One or more components can reside within a process, and a component can be localized on one computer and/or distributed between two or more computers.
  • a set of elements or a set of other components can be described herein, in which the term "set"
  • these components can execute from various computer readable storage media having various data structures stored thereon such as with a module, for example.
  • the components can communicate via local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network, such as, the Internet, a local area network, a wide area network, or similar network with other systems via the signal).
  • a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network, such as, the Internet, a local area network, a wide area network, or similar network with other systems via the signal).
  • a component can be an apparatus with specific functionality provided by mechanical parts operated by electric or electronic circuitry, in which the electric or electronic circuitry can be operated by a software application or a firmware application executed by one or more processing circuits.
  • the one or more processing circuits can be internal or external to the apparatus and can execute at least a part of the software or firmware application.
  • a component can be an apparatus that provides specific functionality through electronic components without mechanical parts; the electronic components can include one or more processing circuits therein to execute software and/or firmware that confer(s), at least in part, the functionality of the electronic components.
  • full-duplex systems allow simultaneous transmit and receive (STR) in the same frequency band at the same time, at a cost of UE-to-UE interference.
  • the UE-to-UE interference has to be properly handled to truly utilize the benefits of full duplex capability.
  • Some of the approaches to handle UE-to-UE interference include intelligently scheduling UEs with little expected UE-to-UE interference for simultaneous transmission and reception.
  • the scheduling of the UEs is done using a joint scheduler at the eNodeB. In order to schedule the UEs, the joint scheduler should be aware of the UE-to-UE interference experienced by the UEs to be scheduled.
  • Some of the prior approaches in estimating the UE-to-UE interference include determining a total UE-to-UE interference, that is, a total interference caused by UL signals from the proximate UEs to the DL signal.
  • a total UE-to-UE interference that is, a total interference caused by UL signals from the proximate UEs to the DL signal.
  • interference situation of individual downlink (DL) and uplink (UL) pair is not available. Therefore, in order to enable the joint scheduler to schedule the uplink and the downlink UEs jointly together, the scheduler needs to estimate individual UL-DL-UE-pair UE-to-UE interference.
  • This disclosure is directed towards a method and an apparatus to determine individual UL-DL-UE-pair UE-to-UE interference in full duplex systems.
  • a reference signal design and a method that enables to estimate individual UL-DL-UE-pair UE-to-UE interference based on the reference signal is disclosed.
  • an interference measurement reference signal (IM-RS) signal is defined and individual UL-DL-UE-pair UE-to-UE interference is estimated based on the newly defined IM-RS reference signal.
  • IM-RS interference measurement reference signal
  • an apparatus and a method for a channel state information (CSI) measurement of UE-to- UE interference is disclosed.
  • the CSI measurement of interference enables to estimate the UE-to-UE interference of a scheduled pair of UEs and therefore, such information can be used for decoding/demodulation purpose.
  • Fig. 1 depicts a simplified block diagram of a full-duplex cellular system 100, that enables to establish a UE-to-UE interference measurement method, according to one embodiment of the disclosure.
  • a new reference signal for example, interference measurement reference signal (IM-RS) (hereinafter referred to as "IM-RS reference signal” or "IM-RS signal”) is defined in order to determine the UE-to- UE interference using the proposed UE-to-UE interference measurement method.
  • IM-RS interference measurement reference signal
  • the proposed UE-to-UE interference measurement method enables to determine a total UE-to-UE interference, l ue2ue (DL-UE) experienced by a downlink (DL) UE from all proximate uplink (UL) UEs.
  • the proposed UE-to-UE interference measurement method further enables to determine an individual UL-DL-UE-pair UE-to-UE interference, that is, the interference caused by each proximate UL UE to the DL UE.
  • the newly defined reference signal enables to determine a total UE-to-UE interference or an individual UL-DL-UE-pair UE-to-UE interference caused by intra cell UL UEs. Further, in other embodiments, the IM-RS reference signal enables to determine a total UE-to-UE interference or an individual UL-DL-UE-pair UE-to-UE interference caused by inter cell UL UEs.
  • the full-duplex system 100 comprises an eNodeB 1 02, a downlink (DL) UE A 104, an uplink (UL) UE B 106 and a UL UE C 108.
  • the proposed UE-to-UE interference measurement method enables to determine a total UE- to-UE interference experienced by the DL UE A 104 from the UL UEs B 106 and C 1 08 (i.e., the potential interferers).
  • the proposed UE-to- UE interference measurement method enables to determine a UE-to-UE interference between the DL UE A 104 and the UL UEs B 106, and a UE-to-UE interference between the DL UE A 104 and the UL UEs C 108.
  • the proposed UE-to-UE interference measurement method using IM-RS reference signals is performed before scheduling the UL UEs and the DL UEs for full-duplex data transmission, in order to facilitate joint scheduling of the UL UEs and the DL UEs.
  • the proposed UE-to-UE interference measurement method is explained using the full-duplex system 100 comprising two UL UEs, that is, the UL UE B 106 and the UL UE C 108.
  • the full-duplex system 1 00 can comprise any number of UL UEs and the proposed UE-to-UE interference measurement method can be used to determine the UE-to-UE interference caused by each of the available UL UEs.
  • the eNodeB 102 is configured to generate and transmit a UE configuration signal 1 1 0 to one or more UEs in a coverage area of the eNodeB 102.
  • the one or more UEs comprises the UL UEs B 106 and C 108, and the DL UE A 104.
  • the UE configuration signal 1 10 configures the UL UEs B 106 and C 108 to generate a respective reference signal, for example, the IM-RS reference signal 1 12 and the IM-RS reference signal 1 14, based on an information contained in the UE configuration signal 1 10.
  • the UE configuration signal 1 10 configures the UL UEs B 106 and C 108 to generate a respective reference signal, for example, the IM-RS reference signal 1 12 and the IM-RS reference signal 1 14, based on an information contained in the UE configuration signal 1 10.
  • the UE configuration signal 1 10 for example, the IM-RS reference signal 1 12 and the IM-RS reference signal 1 14.
  • the configuration signal 1 10 further configures the UL UEs B 106 and C 108 to transmit the IM-RS reference signal 1 1 2 and the IM-RS reference signal 1 14, using one or more IM- RS reserved resource elements of a plurality of predetermined IM-RS reserved resource elements of an LTE frame structure as show in Fig. 2.
  • the UE configuration signal 1 1 0 comprises information on the one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements of the LTE frame structure, to be utilized for transmitting the IM-RS reference signal 1 12 and the IM-RS reference signal 1 14, respectively.
  • the eNodeB 102 is further configured to determine the reserved resource element allocation of the LTE frame structure 200, comprising the plurality of IM-RS reserved resource elements allocated for transmitting the IM-RS reference signals associated with the UL UEs associated therewith as shown in Fig. 2.
  • the IM-RS reserved resource elements e.g., 202a, 202b, 203a and 203b in Fig. 2 allocated for transmitting the IM-RS reference signals are orthogonal to other resource elements used for transmitting data and other reference signals.
  • the IM-RS reserved resource element allocation of the LTE frame structure is determined at the eNodeB 102, and is made available to the UEs in the coverage area of the eNodeB 102, for example, the UEs A 104, B 106 and C 108, prior to initiating the interference measurement method.
  • the UEs A 104, B 106 and C 108 prior to initiating the interference measurement method.
  • the IM-RS reserved resource element allocation of the LTE frame structure is determined at a central controller (not shown), and is made available to a plurality of intra cell and inter cell UEs associated with the eNodeB 102.
  • the eNodeB 102 is further configured to generate a plurality of IM-RS sequences required to generate the IM-RS reference signals at the UL UEs, for example, the IM-RS reference signal 1 1 2 and the IM-RS reference signal 1 14.
  • the plurality of IM-RS sequences to be used by different UL UEs are quasi orthogonal among each other.
  • the IM-RS sequences for generating the IM-RS reference signals for intra cell UL UEs and neighboring cell UL UEs are generated at the central controller. Further, IM-RS sequences used within a cell may have zero or low correlation, and the IM-RS sequences between neighbor cells and cells farther away may have more correlation.
  • the number of IM-RS sequences to be generated at the eNodeB 102 is predetermined based on a number of available UEs. [0036] In some embodiments, the IM-RS sequences generated at the eNodeB 102 is represented by the equation,
  • the resource element index k is indicative of the sequence length and provides information on the number of reserved resource elements of the plurality of reserved resource elements to be utilized for transmitting the IM-RS reference signals (e.g., signals 1 12 and 1 14) generated at the UL UEs, for example, UL UE B 106 and UL UE C 108.
  • the IM-RS reference signals e.g., signals 1 12 and 1 14
  • the IM-RS index j is an index that identifies each IM- RS sequence and the IM-RS index j enables the eNodeB 102 to configure the UL UEs, for example, UL UE B 106 and UL UE C 1 08 to generate a respective IM-RS reference signal mapped to a particular IM-RS sequence of the plurality of IM-RS sequences.
  • the eNodeB 102 is configured to generate information on an IM-RS mapping s(j) that maps an IM-RS index j to a UL UE id. In some embodiments, the eNodeB 102 is further configured to transmit respective IM-RS indexes ⁇ j ⁇ to the UL UEs using the UE configuration signal 1 1 0, based on the IM-RS mapping s(j), for generating a respective IM-RS reference signal at the UL UE, for example, the UL UE B 106 and UL UE C 108.
  • the IM-RS index j enables a UL UE, for example, the UL UE 106 to generate a respective IM-RS reference signal, for example, signal 1 1 2, based on a mapping between the IM-RS index j received from the eNodeB 102 and the IM-RS indexes of the available IM-RS sequences at the respective UL UE B 106.
  • the IM-RS index j received from the eNodeB 1 02 indicates UL UE about the IM-RS sequence to be allocated to the respective UL UE and enables the UL UE to generate an IM-RS reference signal with the allocated IM-RS sequence of the plurality of IM-RS sequences available at the UL UE.
  • the eNodeB 102 is further configured to transmit information on the one or more reserved resource elements of the plurality of reserved resource elements of the LTE frame structure, to be utilized for transmitting the IM-RS reference signal 1 1 2 and the IM-RS reference signal 1 14, to the respective UL UEs, B 106 and C 108, via the UE configuration signal 1 1 0.
  • the UL UEs B 106 and C 108 are configured to generate a respective IM-RS reference signal, for example, the signals 1 12 and 1 14 respectively, based on the received UE configuration signal 1 1 0, in accordance with the mapping indicated above. Further, the UL UEs B 106 and C 108 are configured to transmit their respective IM-RS reference signals 1 12 and 1 14, using one or more IM-RS reserved resource elements, say, for example, resource elements 202a and 202b in Fig. 2, of the plurality of reserved resource elements of the LTE frame structure 200, as dictated by the UE configuration signal 1 1 0.
  • IM-RS reserved resource elements say, for example, resource elements 202a and 202b in Fig. 2
  • the eNodeB 102 is further configured to transmit a downlink signal 1 1 8 to the DL UE A 104.
  • the downlink signal 1 1 8 from the eNodeB 102 provides information on the IM-RS index set ⁇ j ⁇ utilized for generating the IM-RS reference signals 1 1 2 and 1 14.
  • the downlink signal 1 1 8 further provides information on the one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements of the LTE frame structure, utilized for transmitting the IM-RS reference signals 1 12 and 1 14 from the UL UEs B 106 and C 108 respectively.
  • the information on the one or more IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals 1 12 and 1 14 comprises in the downlink signal 1 18, enables the DL UE 104 to determine an interference received from the UL UEs B 106 and C 108, based on the IM-RS reference signals 1 12 and 1 14.
  • the information comprised in the downlink signal 1 1 8 can be transmitted using the UE configuration signal 1 1 0.
  • the DL UE 1 04 is configured to receive the downlink signal 1 18 from the eNodeB 102. Further, the DL UE 104 is configured to receive interference signals comprising a portion of the IM-RS reference signals 1 12 and 1 14 from the UL UEs B 106 and C 1 08, that is indicative of the interference caused by the respective UL UEs in the downlink data path of the DL UE 104.
  • the interference signals in the UE-to-UE channel between the UL UEs and the DL UE is given by the equation, N
  • fj is the UE-UE channel between a UL UE and a DL UE and N(k) is the additive noise.
  • the DL UE 104 determines the interference power associated with an IM-RS sequence with the j th index using the equation,
  • the determined interference power p corresponds to individual DL-UL pair UE-to-UE interference between the DL UE 104, and the UL UEs B 106 and C 108, respectively.
  • the DL UE 104 is configured to transmit the determined interference powers to the eNodeB 102.
  • the eNodeB 102 then utilizes this information to jointly schedule the UL UE B 106, UL UE C 108 and DL UE 104. For example, a UL UE that causes minimum interference to a DL UE is scheduled together with the DL UE 108 for simultaneous transmission/ reception.
  • a timing alignment between the DL UE and the UL UE should be achieved to ensure a correct reception of the IM-RS reference signals at the DL UE.
  • Fig. 1 5 illustrates a procedure to achieve a timing alignment between a UL UE1 and a DL UE2, where the UL UE 1 has to send IM-RS reference signal to the DL UE2.
  • an uplink reception of the UE1 and UE2 are allingned at the eNodeB at a time t1 , based on providing a timing advance (TA) command to the UEs, UE1 and UE2 from the eNodeB.
  • TA timing advance
  • the TA command enables to advance the UL transmissions of the UE1 and UE2 by a certain amount of time.
  • the TA command is determined based on a propagation delay from the eNodeB to the UE1 and UE1 , respectively in downlink.
  • ⁇ 1 is the offset in UE1 's uplink transmission subframe for IM-RS (UE1 ->UE2)
  • ⁇ 2 is the offset in UE2's downlink reception subframe for IME- RS (UE1 ->UE2) and propagation delay from UE1 to UE2 is AUEI -2.
  • the timing alignment required for IM-RS transmission/reception between uplink UE1 and downlink UE2 can be achieved by notifying UE1 about 52 and AUE1 -2, or notifying UE2 about 51 and AUE1 -2, such that one of UEs, UE1 or UE2 can adjust their offset accordingly whilst keeping the other party's offset predefined.
  • the time alignment procedure periodically repeats.
  • Fig. 3 depicts a simplified block diagram of a full-duplex cellular system 300, that enables to establish UE-to-UE interference measurement utilizing a channel state information measurement (CSI-IM), according to one embodiment of the disclosure.
  • the proposed UE-to-UE interference measurement method enables to determine a total UE-to-UE interference, l ue2ue (DL-UE) experienced by a downlink (DL) UE from all proximate uplink (UL) UEs and an inter cell interference, linter- ue2ue (DL-UE) experienced by the DL UE from all neighboring cell UL UEs.
  • the CSI-IM interference measurement method is established prior to scheduling the UL UEs and DL UEs for full-duplex transmission. Further, in other embodiments, the proposed UE-to-UE interference measurement method further enables to determine an intra cell UE-to-UE interference, l in tra-ue2ue(DL-UE SC hed) from a scheduled pair. In some embodiments, the scheduled pair comprises an UL UE and a DL UE scheduled together for simultaneous transmission/reception.
  • the total UE-to-UE interference, l ue2ue (DL-UE), the inter cell interference, l in t e r-ue-?ue(DL-UE) and the intra cell UE-to-UE interference, lintra- ue 2 Ue (DL-UE SC hed) are determined based on transmitting UL data or a reference signal associated with a UL UE, through one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements, for example, resource elements 402a and 402b, of an LTE frame structure 400 as shown in Fig. 4.
  • the CSI-IM reserved resource element allocation of the LTE frame structure comprising plurality of reserved resource elements for CSI-IM is determined prior to initiating the CSI-IM interference measurement method. In some embodiments, the CSI-IM reserved resource element allocation of the LTE frame structure is determined at an eNodeB associated therewith and is made available to one or more relevant UEs in a coverage area of the eNodeB.
  • the full-duplex system 300 comprises an eNodeB 302, a downlink (DL) UE A 304, an uplink (UL) UE B 306 and a UL UE C 308.
  • the eNodeB 302 is configured to generate a UE configuration signal 310 for subsequent transmission to the UEs A 304, B 306 and C 308.
  • the UE configuration signal 310 configured to configure one or more UL UEs, for example, the UL UE B 306 and the UL UE C 308, in a coverage area of the eNodeB 302 to selectively transmit a UL data or a reference signal associated therewith, using one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure as shown in Fig. 4.
  • the eNodeB 302 is further configured to determine the CSI-IM reserved resource element allocation of the LTE frame structure, comprising the plurality of CSI-IM reserved resource elements allocated for transmitting the CSI-IM reference signals or data associated with the UL UEs, for example, the UL UE B 306 and the UL UE C 308.
  • the reserved resource elements allocated for transmitting the CSI-IM reference signals are orthogonal to other resource elements used for transmitting data and other reference signals.
  • the CSI-IM reserved resource element allocation of the LTE frame structure determined at the eNodeB 302 is made available to the UEs in the coverage area of the eNodeB 302, for example, the UEs A 304, B 306 and C 308, prior to initiating the interference measurement method.
  • the CSI-IM reserved resource element allocation of the LTE frame structure is determined at a central controller (not shown), and is made available to a plurality of intra cell and inter cell UEs associated with the eNodeB 102.
  • the eNodeB 302 in order to determine the total UE-to-UE interference, l ue2ue (DL-UE) experienced by the DL UE A 304, the eNodeB 302 generates the UE configuration signal 310 and transmits the UE configuration signal 310 to each of the UL UEs in the proximity of the DL UE A 304, for example, the UL UE B 306 and the UL UE C 308.
  • the UE configuration signal 31 0 is configured to configure each of the UL UEs in the proximity of the DL UE A 304, for example, the UL UE B 306 and the UL UE C 308 to transmit a UL data associated with the respective UL UEs, using one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the UE configuration signal 310 further comprises information on the one or more CSI-IM reserved resource elements to be utilized for transmitting the UL data.
  • the eNodeB 302 is configured to mute all downlink data transmissions from the eNodeB 302 in the one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of the LTE frame structure.
  • each of the UL UEs B 306 and C 308, Upon receiving the UE configuration signal 310, each of the UL UEs B 306 and C 308, transmits a UL signal comprising the UL data, for example, signals 314 and 31 2 respectively, using the one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure, as indicated by the UE configuration signal 310.
  • the eNodeB 302 is further configured to transmit a downlink signal 318 to the DL UE 304.
  • the downlink signal 318 provides information on the one or more CSI-IM reserved resource elements utilized for transmitting signals containing the UL data, for example, the signals 31 2 and 314, from the UL UEs B 306 and C 308 to the DL UE A 304.
  • the information on the one or more CSI-IM reserved resource elements utilized for transmitting the signals 312 and 314 comprised in the downlink signal 31 enables the DL UE 304 to determine an interference received from the UL UEs B 306 and C 308, based on the signals 312 and 314.
  • the DL UE A 304 Upon receiving the downlink signal 31 8, the DL UE A 304 then determines an interference power associated with the UL data transmitted from the UL UEs B 306 and C 308, by measuring interference power received using the one or more CSI-IM reserved resource elements.
  • the interference power determined at the DL UE A 304 comprises the total or overall UE-to-UE interference, l ue2ue (DL-UE).
  • the DL UE A 304 is further configured to transmit the determined interference power 316 to the eNodeB 302.
  • the eNodeB 302 is configured to generate the UE configuration signal 302 that enables to determine inter cell interference, l in ter-ue-?ue(DL- UE).
  • the UE configuration signal 310 is configured to configure each of the UL UEs in a neighboring cell of the DL UE A 304 to transmit UL data using the one or more CSI-IM reserved resource elements and muting all UL UEs within the cell in which the DL UE A 304 is located.
  • an interference power determined at the DL UE A 304 comprises the inter cell interference, l in t e r-ue-?ue(DL-UE).
  • the procedure by which the interference power is determined at the DL UE A 304 is the same as indicated above with respect to determining the total UE-to-UE interference, l ue2ue (DL-UE).
  • the CSI-IM interference measurement method can be utilized for determining an intra cell UE-to-UE interference, l in tra-ue-?ue(DL-UE SC hed) from a scheduled pair.
  • the CSI-IM interference measurement method is performed after an UL UE and a DL UE are scheduled together for simultaneous transmission/reception.
  • the eNodeB 302 is configured to generate the UE configuration signal 310 and transmit the UE configuration signal 31 0 to the scheduled UE pair, for example, the UL UE B 306 and the DL UE A 304.
  • the UE configuration signal 310 is configured to configure the UL UE B 306 scheduled for simultaneous transmission with the DL UE A 304, to transmit a UL signal 314 comprising a CSI-IM reference signal using one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the UE configuration signal 310 further comprises information on the one or more CSI-IM reserved resource elements to be utilized for transmitting the CSI-IM reference signal 314.
  • the CSI-IM reference signal 314 comprises UE specific reference signal generated at the respective UL UE based on a location information of the respective UL UE, for example, a cell id of a cell in which the UL UE is located, in accordance with a predetermined algorithm.
  • the location information of the UL UE is further received from the eNodeB 102, prior to initiating the CSI-IM interference measurement method.
  • the CSI-IM reference signals within a cell are the same.
  • the UL UE B 306 transmits the CSI-IM reference signal 314 using the one or more CSI-IM reserved resource elements as dictated by the UE configuration signal 310.
  • the eNodeB 302 is further configured to transmit a downlink signal 31 8 to the DL UE A 304.
  • the downlink signal 31 8 provides information on the one or more CSI-IM reserved resource elements utilized for transmitting the CSI-IM reference signal 314 from the UL UEs B 306, to the DL UE A 304.
  • the information comprised in the downlink signal 318 can be transmitted using the UE configuration signal 310.
  • the DL UE A 304 determines an interference power associated with the CSI-IM signal 314 transmitted from the UL UEs B 306, based on the interference power received using the one or more CSI-IM reserved resource elements indicated in the downlink signal 318.
  • the interference power determined at the DL UE A 304 comprises the intra cell UE-to-UE interference, l in tra-ue-?ue(DL-UE SC hed) from a scheduled pair UL UE B 306 and the DL UE A 304.
  • lintra-ue2ue(DL-UE sch ed) from the UL UE B 306 is utilized by the DL UE A 304 for decoding or demodulation of downlink data received from the eNodeB 302, at the DL UE 304.
  • Fig. 5 illustrates a block diagram of an apparatus 500 for use in an eNodeB of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • the eNodeB is described herein with reference to the eNodeB 102 in Fig. 1 for interference measurement using interference measurement reference signal (IM-RS) and with reference to the eNodeB 302 in Fig. 3 for interference measurement using channel state information
  • IM-RS interference measurement reference signal
  • the apparatus 500 includes a receiver circuit 520, a processing circuit 530, and a transmitter circuit 510. Further, in some embodiments, the apparatus 500 comprises a memory circuit 540 coupled to the processing circuit 530. Each of the receiver circuit 520 and the transmitter circuit 51 0 are configured to be coupled to one or more antennas, which can be the same or different antenna(s). Further, in some embodiments, the apparatus comprises a memory circuit 540 coupled to the processing circuit 530. In some embodiments, the receiver circuit 520 and the transmitter circuit 51 0 can have one or more components in common, and both can be included within a transceiver circuit, while in other aspects they are not. In various embodiments, the apparatus 500 can be included within an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (Evolved NodeB, eNodeB, or eNB).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • NodeB Evolved NodeB, eNodeB, or eNB
  • the apparatus 500 could be included within the eNodeB 102 in Fig. 1 .
  • the processing circuit 530 is configured to generate a UE configuration signal (e.g., the UE configuration signal 1 10) for subsequent transmission to one or more UEs (e.g., A 104, B 106 and C 1 08) via the transmit circuit 510 in a coverage area of the eNodeB, in order to initiate the IM-RS based interference measurement.
  • a UE configuration signal e.g., the UE configuration signal 1 10
  • UEs e.g., A 104, B 106 and C 1 08
  • the UE configuration signal is configured to configure one or more UL UEs in the coverage area of the eNodeB, for example, the UL UE B 106 and the UL UE C 108, to transmit an IM-RS reference signal (e.g., signals 1 12 and 1 14 respectively) associated with the respective UL UE.
  • the UE configuration signal is configured to configure the one or more UL UEs to transmit the respective IM-RS reference signals using one or more IM-RS reserved resource elements of a plurality of IM-RS reserved resource elements of an LTE frame structure.
  • the processing circuit 530 is further configured to determine the IM-RS reserved resource element allocation of the LTE frame structure (e.g., the LTE frame structure in Fig. 2) and store the determined IM-RS reserved resource element allocation in the memory circuit 540. In some embodiments, it is assumed that the IM-RS reserved resource element allocation of the LTE frame structure determined at the processing circuit 530, is transmitted to the UEs via the transmit circuit 510 in the coverage area of the eNodeB prior to initiating the IM-RS interference measurement method.
  • the processing circuit 530 is further configured to generate a plurality of IM-RS sequences required to generate the IM-RS reference signals at the UL UEs, for example, the IM-RS reference signal 1 12 and the IM-RS reference signal 1 14.
  • a fixed set of IM-RS sequences generated at the processing circuit 530 is stored at the memory circuit 540 and is further transmitted to all the relevant UEs of the eNodeB 102, for example, the UEs A 104, B 106 and C 108, via the transmit circuit 510, prior to transmitting the UE configuration signal for determining the UE-to-UE interference.
  • the UE configuration signal transmitted from the processing circuit 530 further comprises information on a mapping that indicates the UL UEs about the IM- RS sequence to be used for generating a respective IM-RS reference signal associated with each of the UL UEs.
  • the processing circuit 530 is further configured to transmit a downlink signal (e.g., the downlink signal 1 1 8) to the DL UE (e.g., the DL UE A 104).
  • the downlink signal 1 18 from the eNodeB 1 02 provides information on the IM-RS sequences utilized for generating the IM-RS reference signals 1 1 2 and 1 14.
  • the downlink signal 1 18 further provides information on the one or more IM-RS reserved resource elements of the plurality of IM- RS reserved resource elements of the LTE frame structure, utilized for transmitting the IM-RS reference signals 1 12 and 1 14.
  • the processing circuit 530 is further configured to receive an interference measurement signal (e.g., signal 1 1 6) via the receive circuit 520 from the DL UE (e.g., the DL UE A 104), in response to sending the downlink signal.
  • the interference measurement signal from the DL UE provides information on the interference power associated with the IM-RS sequences utilized for generating the IM-RS reference signals.
  • the apparatus 500 could be included within the eNodeB 302 in Fig. 3.
  • the processing circuit 530 is configured to generate a UE configuration signal (e.g., the UE configuration signal 310) for subsequent transmission to one or more UEs (e.g., A 304, B 306 and C 308) via the transmit circuit 510 in a coverage area of the eNodeB, in order to initiate the CSI-IM based interference measurement.
  • a UE configuration signal e.g., the UE configuration signal 310
  • UEs e.g., A 304, B 306 and C 308
  • the UE configuration signal is configured to configure one or more UL UEs in the coverage area of the eNodeB, for example, the UL UE B 306 and the UL UE C 308, to selectively transmit a CSI-IM reference signal or UL data (e.g., signals 1 12 and 1 14 respectively) associated with the respective UL UE.
  • the UE configuration signal is configured to configure the one or more UL UEs to transmit the respective CSI-IM reference signal or the UL data using one or more CSI-IM reserved resource elements of a plurality of CSI- IM reserved resource elements of an LTE frame structure.
  • the processing circuit 530 is further configured to determine the CSI-IM reserved resource element allocation of the LTE frame structure and store the determined CSI-IM reserved resource element allocation in the memory circuit 540. In some embodiments, it is assumed that the CSI-IM reserved resource element allocation of the LTE frame structure determined at the processing circuit 530, is transmitted to all the UEs in the coverage area of the eNodeB via the transmit circuit 51 0 prior to initiating the CSI-IM interference measurement method.
  • the UE configuration signal (e.g., the UE configuration signal 310) is configured to configure each of the UL UEs (e.g., the UL UE B 306 and the UL UE C 308) in the proximity of the DL UE, to transmit UL data using one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the processing circuit 530 is configured to mute all downlink data transmissions from the eNodeB in the one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of the LTE frame structure.
  • the UE configuration signal e.g., the UE configuration signal 310 is configured to configure all neighboring cell UL UEs to transmit UL data using one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure muting all intra cell UL UEs.
  • the processing circuit 530 is configured to mute all downlink data transmissions from the eNodeB in the one or more CSI-IM reserved resource elements of a plurality of CSI-IM reserved resource elements of the LTE frame structure.
  • the UE configuration signal (e.g., the UE configuration signal 310) is configured to configure the UL UE (e.g.,UL UE B 306) scheduled for transmission with the DL UE (e.g., DL UE A 304), to transmit a UL signal 314 comprising a CSI-IM reference signal using one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the processing circuit 530 is further configured to transmit a downlink signal (e.g., the downlink signal 318) to the DL UE (e.g., DL UE A 304).
  • the downlink signal provides information on the one or more CSI-IM reserved resource elements utilized for transmitting the CSI-IM signal of the scheduled UL UE (e.g., the UL UE B 306).
  • the processing circuit 530 is further configured to receive an interference measurement signal (e.g., interference measurement signal 31 6) in response to transmitting the downlink signal.
  • the interference measurement signal comprises information on a total UE-to-UE interference, l ue2ue (DL-UE) or inter cell interference, l in t e r-ue-?ue(DL-UE), when UL data is transmitted from the UL UEs based on the UE configuration signal.
  • the interference measurement signal comprises information on intra cell UE-to-UE interference, lintra- ue 2 Ue (DL-UE SC hed) from a scheduled pair, when a CSI-IM reference signal is transmitted from a scheduled UL UE, based on the UE configuration signal.
  • Fig. 6 illustrates a block diagram of an apparatus 600 for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • the UL UE is described herein with reference to the UL UE B 106 in Fig. 1 for interference measurement using interference measurement reference signal (IM-RS) and with reference to the UL UEB 306 in Fig. 3 for interference measurement using channel state information measurement (CSI-IM) resource elements.
  • the apparatus 600 includes a receiver circuit 610, a processing circuit 630, and a transmitter circuit 620. Further, in some embodiments, the apparatus 600 comprises a memory circuit 640 coupled to the processing circuit 630.
  • Each of the receiver circuit 610 and the transmitter circuit 620 are configured to be coupled to one or more antennas, which can be the same or different antenna(s).
  • the receiver circuit 610 and transmitter circuit 620 can have one or more components in common, and both can be included within a transceiver circuit, while in other aspects they are not.
  • the apparatus 600 can be included within a UE, for example, with apparatus 600 (or portions thereof) within a receiver and transmitter or a transceiver circuit of a UE.
  • the apparatus 600 could be included within the UL UE B 106 in Fig. 1 .
  • the processing circuit 630 is configured to receive a UE configuration signal (e.g., the UE configuration signal 1 10) from the eNodeB 102, via the receive circuit 610.
  • the processing circuit 630 is configured to generate an IM-RS reference signal (e.g., the IM-RS reference signal 1 1 2) for subsequent transmission to the eNodeB 1 02, via the transmit circuit 620.
  • a UE configuration signal e.g., the UE configuration signal 1 10
  • an IM-RS reference signal e.g., the IM-RS reference signal 1 1 2
  • the processing circuit is 630 is configured to transmit the generated IM-RS reference signal using one or more reserved IM-RS resource elements of a plurality of reserved IM-RS resource elements of an LTE frame structure, as dictated by the UE configuration signal. In some embodiments, the processing circuit 630 is further configured to receive a IM-RS reserved resource allocation comprising the plurality of reserved IM-RS resource elements of an LTE frame structure, via the receive circuit 610 from the eNodeB 102, prior to receiving the UE configuration signal.
  • the processing circuit 630 is further configured to receive an IM-RS sequence for generating the IM-RS reference signal associated with the UL UE, via the receive circuit 610, prior to receiving the UE configuration signal. In some embodiments, the processing circuit 630 is further configured to receive a plurality of IM-RS sequences for generating a plurality of IM-RS reference signals associated with a plurality of UL UEs in the network and generate a respective IM-RS reference signal based on an information of a mapping information in the UE configuration signal. In some embodiments, the mapping indicates the IM-RS sequence to be utilized for generating the IM-RS reference signal associated with the respective UL UE. In some embodiments, the IM-RS reserved resource allocation and the plurality of IM-RS sequences received from the eNodeB are stored in the memory circuit 640.
  • the apparatus 600 could be included within the UL UE B 306 in Fig. 3.
  • the processing circuit 630 is configured to receive a UE configuration signal (e.g., the UE configuration signal 310) from the eNodeB 302, via the receive circuit 610.
  • the processing circuit 630 is configured to generate a signal (e.g., the signal 314) for subsequent transmission to the eNodeB 102, via the transmit circuit 620, based on the received UE configuration signal.
  • the generated signal comprises UL data and in other embodiments, the signal comprises a CSI-IM reference signal.
  • the processing circuit is 630 is configured to transmit the UL data or the generated CSI-IM signal using one or more reserved CSI-IM resource elements of a plurality of reserved CSI-IM resource elements of an LTE frame structure, as dictated by the UE configuration signal via the transmit circuit 620.
  • the processing circuit 630 is further configured to receive information on the CSI-IM reserved resource allocation comprising the plurality of reserved CSI-IM resource elements of an LTE frame structure, via the receive circuit 61 0 from the eNodeB 302, prior to receiving the UE configuration signal and store the received CSI-IM reserved resource allocation in the memory circuit 640. Further, in some embodiments, the processing circuit 630 is configured to generate the CSI-IM signal, based on a location information of the respective UL UE, for example, a cell id of a cell in which the UL UE is located, in accordance with a predetermined algorithm, upon receiving the UE configuration signal.
  • Fig. 7 illustrates a block diagram of an apparatus 700 for use in a downlink (DL) user equipment (UE) of a full duplex cellular network, that facilitates UE-to-UE interference measurement, according to the various embodiments described herein.
  • the DL UE is described herein with reference to the DL UE A 104 in Fig. 1 for interference measurement using interference measurement reference signal (IM-RS) and with reference to the DL UE A 304 in Fig. 3 for interference measurement using channel state information measurement (CSI-IM) resource elements.
  • the apparatus 700 includes a receiver circuit 710, a processing circuit 730, and a transmitter circuit 720. Further, in some embodiments, the apparatus 700 comprises a memory circuit 740 coupled to the processing circuit 730.
  • Each of the receiver circuit 710 and the transmitter circuit 720 are configured to be coupled to one or more antennas, which can be the same or different antenna(s).
  • the receiver circuit 710 and transmitter circuit 720 can have one or more components in common, and both can be included within a transceiver circuit, while in other aspects they are not.
  • the apparatus 700 can be included within a UE, for example, with apparatus 700 (or portions thereof) within a receiver and transmitter or a transceiver circuit of a UE.
  • the apparatus 700 could be included within the DL UE A 104 in Fig. 1 .
  • the processing circuit 730 is configured to receive a downlink signal (e.g., the downlink signal 1 1 8) from the eNodeB 102 via the receive circuit 710.
  • the downlink signal comprises an information on the IM-RS sequences utilized for transmitting the IM-RS reference signals associated with the UL UEs (e.g., UL UEs B 106 and C 108), in the proximity of the DL UE (e.g., the DL UE A 104).
  • the downlink signal further comprises information on the one or more IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals associated with the UL UEs.
  • the processing circuit 730 is further configured to receive the IM-RS reference signals from one or more UL UEs in the proximity of the DL UE, for example, the UL UEs B 106 and C 108, via the receive circuit 710, based on the information contained in the downlink signal.
  • the processing circuit 730 is further configured to generate an interference measurement signal (e.g., the signal 1 16) based on the received IM-RS reference signals and the downlink signal, for subsequent transmission to the eNodeB 102 via the transmit circuit 720.
  • the interference measurement signal comprises a plurality of interference measurement signals, each of which is indicative of an interference power associated with a respective IM-RS reference sequence.
  • the processing circuit 730 is further configured to receive an IM-RS reserved resource allocation comprising a plurality of reserved IM-RS resource elements of an LTE frame structure, via the receive circuit 610 from the eNodeB 102, prior to receiving the downlink signal.
  • the received IM-RS reserved resource allocation is stored in the memory circuit 740.
  • the apparatus 700 could be included within the DL UE A 304 in Fig. 3.
  • the processing circuit 730 is configured to receive a downlink signal (e.g., the downlink signal 31 8) from the eNodeB 302 via the receive circuit 710.
  • the downlink signal further comprises information on the one or more IM-RS reserved resource elements utilized for transmitting the UL data or the CSI-IM reference signals associated with the UL UEs.
  • the processing circuit 730 is further configured to receive interference signals (e.g., the CSI-IM signals or UL data) from one or more UL UEs in the proximity of the DL UE, for example, the UL UEs B 306 and C 308, via the receive circuit 710, based on the information contained in the downlink signal.
  • the processing circuit 730 Upon receiving the interference signals, the processing circuit 730 is configured to generate an interference measurement signal (e.g., the signal 316) based on the received interference signals.
  • an interference measurement signal e.g., the signal 316
  • the received interference signals comprise UL data transmitted from a plurality of UL UEs in the proximity of the DL UE using the one or more reserved CSI-IM resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the received interference signal comprise a CSI-IM signal associated with a UL UE scheduled for simultaneous transmission with the DL UE, transmitted using the one or more reserved CSI-IM resource elements of a plurality of CSI-IM reserved resource elements of an LTE frame structure.
  • the generated interference measurement signal i.e., the signal 316
  • the processing circuit 730 is transmitted from the processing circuit 730 to the eNodeB via the transmit circuit 720.
  • the processing circuit 730 is configured to receive a CSI-IM reserved resource allocation comprising the plurality of reserved CSI-IM resource elements of the LTE frame structure, via the receive circuit 71 0 from the eNodeB 302, prior to receiving the downlink signal.
  • the received CSI-IM reserved resource allocation is stored in the memory circuit 740.
  • FIG. 8 illustrates a flowchart of a method 800 for an eNodeB in a full-duplex cellular network, that facilitates interference measurement using interference
  • IM-RS measurement reference signal
  • the method 800 is described herein with reference to the apparatus 500 in Fig. 5 and the full-duplex system 100 in Fig. 1 .
  • the apparatus 500 is included within the eNodeB 102 of the full duplex system 100 in Fig. 1 .
  • an IM- RS reserved resource allocation of an LTE frame structure and a plurality of IM-RS sequences for generating IM-RS reference signals associated with a plurality of UL UEs is determined at the processing circuit 530 and stored in the memory circuit 540.
  • the determined IM-RS reserved resource allocation and the IM-RS reference sequences are further transmitted to a plurality of UEs in a coverage area of the eNodeB.
  • a UE configuration signal is generated at the processing circuit 530 and transmitted to a plurality of UEs in a coverage area of the eNodeB via the transmit circuit 51 0.
  • the UE configuration signal is configured to configure one or more UL UEs in the coverage area of the eNodeB to transmit a respective IM-RS reference signal using one or more IM-RS resource elements of the IM-RS reserved resource allocation of the LTE frame structure.
  • a downlink signal is generated at the processing circuit 530 and transmitted to a DL UE.
  • the downlink signal comprises information on the IM-RS sequences utilized for generating the IM-RS reference signals of the one or more UL UEs.
  • the downlink signal further comprises information on the one or more IM- RS reserved resource elements of the plurality of IM-RS reserved resource elements of the LTE frame structure, utilized for transmitting the IM-RS reference signals.
  • an interference measurement signal is received from the DL UE, at the processing circuit 530 via the receive circuit 520, in response to transmitting the downlink signal.
  • the interference measurement signal is indicative of the
  • Fig. 9 illustrates a flowchart of a method 900 for an eNodeB in a full-duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM) reserved resource elements, according to one embodiment of the disclosure.
  • the method 900 is described herein with reference to the apparatus 500 in Fig. 5 and the full-duplex system 300 in Fig. 3.
  • the apparatus 500 is included within the eNodeB 302 of the full duplex system 300 in Fig. 3.
  • a CSI-IM reserved resource allocation of an LTE frame structure is determined at the processing circuit 530 and stored in the memory circuit 540.
  • the determined CSI-IM reserved resource allocation is further transmitted to a plurality of UEs in a coverage area of the eNodeB.
  • a UE configuration signal is generated at the processing circuit 530 and transmitted to a plurality of UEs in a coverage area of the eNodeB via the transmit circuit 51 0.
  • the UE configuration signal is configured to configure one or more UL UEs in the coverage area of the eNodeB to transmit a UL data using one or more CSI-IM reserved resource elements of the CSI-IM reserved resource allocation of the LTE frame structure.
  • the UE configuration signal is configured to configure an UL UE scheduled for simultaneous transmission with a DL UE to transmit a CSI-IM signal using one or more CSI-IM reserved resource elements of the CSI-IM reserved resource allocation of the LTE frame structure.
  • a downlink signal is generated at the processing circuit 530 and transmitted to a DL UE.
  • the downlink signal further comprises information on the one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements of the LTE frame structure, utilized for transmitting the CSI-IM reference signal or UL data.
  • an interference is generated at the processing circuit 530 and transmitted to a DL UE.
  • the downlink signal further comprises information on the one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements of the LTE frame structure, utilized for transmitting the CSI-IM reference signal or UL data.
  • measurement signal is received from a DL UE, at the processing circuit 530 via the receive circuit 520, in response to transmitting the downlink signal.
  • the interference measurement signal is indicative of the interference power received at the DL UE, from the one or more UL UEs transmitting UL data. In other embodiments, the interference measurement signal is indicative of the
  • interference power received at the DL UE, from the UL UE scheduled for simultaneous transmission with a DL UE is interference power received at the DL UE, from the UL UE scheduled for simultaneous transmission with a DL UE.
  • Fig. 10 illustrates a flowchart of a method 1 000 for an uplink (UL) user equipment (UE) in a full-duplex cellular network, that facilitates interference
  • UL uplink
  • UE user equipment
  • IM-RS interference measurement reference signal
  • the method 1000 is described herein with reference to the apparatus 600 in Fig. 6 and the full-duplex system 100 in Fig. 1 .
  • the apparatus 600 is included within the UL UE B 106 of the full duplex system 1 00 in Fig. 1 .
  • an IM-RS reserved resource allocation of an LTE frame structure for transmitting IM-RS reference signals and a plurality of IM-RS sequences for selectively generating the IM-RS reference signal associated with the UL UE is received from an eNodeB at the processing circuit 630 and stored in the memory circuit 640.
  • a UE configuration signal is received from the eNodeB at the processing circuit 630 via the receive circuit 610.
  • an IM-RS reference signal associated with the UL UE is generated at the processing circuit 630 in response to receiving the UE configuration signal.
  • the generated IM-RS reference signal is transmitted from the processing circuit 630 via the transmit circuit 620, based on the received UE configuration signal.
  • Fig. 1 1 illustrates a flowchart of a method 1 1 00 for an uplink (UL) user equipment (UE) in a full-duplex cellular network, that facilitates interference
  • CSI-IM channel state information measurement
  • a configuration signal is received from the eNodeB at the processing circuit 630 via the receive circuit 610.
  • a signal associated with the UL UE is generated at the processing circuit 630 in response to receiving the UE configuration signal.
  • the signal comprises UL data and in other embodiments, the signal comprises a CSI-IM reference signal.
  • the UL data or generated CSI-IM signal is transmitted from the processing circuit 630 via the transmit circuit 620 using one or more CSI-IM reserved resource elements of the CSI-IM reserved resource allocation of the LTE frame structure.
  • Fig. 1 2 illustrates a flowchart of a method 1200 for a downlink (DL) user equipment (UE) in a full-duplex cellular network, that facilitates interference
  • DL downlink
  • UE user equipment
  • IM-RS interference measurement reference signal
  • the method 1200 is described herein with reference to the apparatus 700 in Fig. 7 and the full-duplex system 100 in Fig. 1 .
  • the apparatus 700 is included within the DL UE A 104 of the full duplex system 1 00 in Fig. 1 .
  • an IM-RS reserved resource allocation of an LTE frame structure is received from an eNodeB at the processing circuit 730 and stored in the memory circuit 740.
  • a downlink signal is received from the eNodeB at the processing circuit 730 via the receive circuit 710.
  • the downlink signal comprises information on the IM-RS reference sequences utilized for transmitting IM-RS reference signals associated with a plurality of UL UEs in the proximity of the DL UE. In some embodiments, the downlink signal further comprises information on the one or more IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals associated with the plurality of UL UEs.
  • an interference signal comprising a portion of the IM-RS reference signals associated with the plurality of UL UEs is received at the processing circuit 730 via the receive circuit 710, using the one or more IM-RS reserved resource elements indicated in the downlink signal.
  • an interference measurement signal indicative of the interference power associated with a respective IM-RS sequence is generated at the processing circuit 730.
  • the generated interference measurement signal is transmitted to the eNodeB via the transmit circuit 720.
  • Fig. 1 3 illustrates a flowchart of a method 1300 for a downlink (DL) user equipment (UE) in a full-duplex cellular network, that facilitates interference
  • DL downlink
  • UE user equipment
  • CSI-IM channel state information measurement
  • the downlink signal comprises information on the one or more CSI- IM reserved resource elements utilized for transmitting the UL data or CSI-IM reference signal associated with one or more UL UEs in the proximity of the DL UE.
  • an interference signal associated with one or more UL UEs in the proximity of the DL UE is received at the processing circuit 730 via the receive circuit 71 0, based on the information in the received downlink signal.
  • the interference signal comprises UL data transmitted by one or more UL UEs in the proximity of the DL UE, using the one or more CSI-IM reserved resource elements and in other
  • the interference signal comprises CSI-IM reference signal transmitted by an UL UE scheduled for simultaneous transmission with the DL UE, using the one or more CSI-IM reserved resource elements.
  • an interference measurement signal indicative of the interference power received from the one or more UL UEs is generated at the processing circuit 730, based on the received interference signal.
  • the generated interference measurement signal is transmitted to the eNodeB via the transmit circuit 720.
  • FIG. 14 illustrates, for one embodiment, example components of a User Equipment (UE) device 1400.
  • the UE device 1400 may include application circuitry 1402, baseband circuitry 1404, Radio Frequency (RF) circuitry 1406, front-end module (FEM) circuitry 1408 and one or more antennas 1410, coupled together at least as shown.
  • RF Radio Frequency
  • FEM front-end module
  • the application circuitry 1402 may include one or more application processing circuits.
  • the application circuitry 1402 may include circuitry such as, but not limited to, one or more single-core or multi-core processing circuits.
  • the processing circuit(s) may include any combination of general-purpose processing circuits and dedicated processing circuits (e.g., graphics processing circuits, application processing circuits, etc.).
  • the processing circuits 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 1404 may include circuitry such as, but not limited to, one or more single-core or multi-core processing circuits.
  • the baseband circuitry 1404 may include one or more baseband processing circuits and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 1406 and to generate baseband signals for a transmit signal path of the RF circuitry 1406.
  • Baseband processing circuity 1404 may interface with the application circuitry 1402 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 1406.
  • the baseband circuitry 1404 may include a second generation (2G) baseband processing circuit 1404a, third generation (3G) baseband processing circuit 1404b, fourth generation (4G) baseband processing circuit 1404c, and/or other baseband processing circuit(s) 1404d for other existing
  • the baseband circuitry 1404 may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 1406.
  • the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
  • modulation/demodulation circuitry of the baseband circuitry 1404 may include Fast- Fourier Transform (FFT), precoding, and/or constellation mapping/demapping functionality.
  • FFT Fast- Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 1404 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 1404 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) 1404e of the baseband circuitry 1404 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 processing circuit(s) (DSP) 1404f.
  • DSP audio digital signal processing circuit
  • the audio DSP(s) 1404f may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • 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 1404 and the application circuitry 1402 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 1404 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 1404 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 1404 is configured to support radio communications of more than one wireless protocol.
  • RF circuitry 1406 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 1406 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 1406 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 1408 and provide baseband signals to the baseband circuitry 1404.
  • RF circuitry 1406 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 1404 and provide RF output signals to the FEM circuitry 1408 for transmission.
  • the RF circuitry 1406 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 1406 may include mixer circuitry 1406a, amplifier circuitry 1406b and filter circuitry 1406c.
  • the transmit signal path of the RF circuitry 1406 may include filter circuitry 1406c and mixer circuitry 1406a.
  • RF circuitry 1406 may also include synthesizer circuitry 1406d for synthesizing a frequency for use by the mixer circuitry 1406a of the receive signal path and the transmit signal path.
  • the mixer circuitry 1406a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 1408 based on the synthesized frequency provided by synthesizer circuitry 1406d.
  • the amplifier circuitry 1406b may be configured to amplify the down-converted signals and the filter circuitry 1406c 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 1404 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 1406a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 1406a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 1406d to generate RF output signals for the FEM circuitry 1408.
  • the baseband signals may be provided by the baseband circuitry 1404 and may be filtered by filter circuitry 1406c.
  • the filter circuitry 1406c 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 1406a of the receive signal path and the mixer circuitry 1406a 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 1406a of the receive signal path and the mixer circuitry 1406a 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 1406a of the receive signal path and the mixer circuitry 1406a may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry 1406a of the receive signal path and the mixer circuitry 1406a 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 1406 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 1404 may include a digital baseband interface to communicate with the RF circuitry 1406.
  • 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
  • the synthesizer circuitry 1406d 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 1406d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 1406d may be configured to synthesize an output frequency for use by the mixer circuitry 1406a of the RF circuitry 1406 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 1406d 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 1404 or the applications processing circuit 1402 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 processing circuit 1402.
  • Synthesizer circuitry 1406d of the RF circuitry 1406 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 1406d 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 (fLO).
  • the RF circuitry 1406 may include an IQ/polar converter.
  • FEM circuitry 1408 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 1410, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 1406 for further processing.
  • FEM circuitry 1408 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 1406 for transmission by one or more of the one or more antennas 1410.
  • the FEM circuitry 1408 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 1406).
  • LNA low-noise amplifier
  • the transmit signal path of the FEM circuitry 1408 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 1406), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 1410.
  • PA power amplifier
  • the UE device 1400 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.
  • Examples can include subject matter such as a method, means for performing acts or blocks of the method, at least one machine-readable medium including instructions that, when performed by a machine cause the machine to perform acts of the method or of an apparatus or system for concurrent communication using multiple communication technologies according to embodiments and examples described herein.
  • Example 1 is an apparatus for use in an eNodeB of a full duplex cellular network, that facilitates interference measurement using interference measurement reference signals (IM-RS), comprising: a memory circuit configured to store information comprising a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the predetermined IM-RS reserved resource element allocation comprises a plurality of IM-RS reserved resource elements employed for transmitting IM-RS reference signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network; and a processing circuit configured to generate a UE configuration signal comprising information on one or more reserved resource elements of the plurality of reserved resource elements to be utilized for transmitting IM-RS reference signals associated with the one or more UL UEs; and provide the UE configuration signal to a transmit circuit for subsequent transmission to the one or more UL UEs in the cellular network, wherein the UE configuration signal is configured to configure the one or more UL UEs to generate a respective unique
  • Example 2 is an apparatus including the subject matter of example 1 , wherein the memory circuit further comprises information on a plurality of IM-RS predefined reference sequences having a respective reference index associated therewith, for generating the unique IM-RS reference signals associated with the one or more uplink (UL) user equipments (UEs) of the plurality of UL UEs in the cellular network, and wherein the processing circuit is further configured to generate a reference index mapping that determines the respective predefined IM-RS sequences to be utilized for generating the respective unique IM-RS reference signals of the one or more UL UEs.
  • UL uplink
  • UEs user equipments
  • Example 3 is an apparatus including the subject matter of examples 1 -2, including or omitting elements, wherein the UE configuration signal further comprises a plurality of reference indexes, wherein each of the plurality of reference indexes identifies an IM-RS predefined reference sequence of the plurality of IM-RS predefined reference sequences to be utilized for generating the unique IM-RS reference signal of a respective UL UE of the one or more UL UEs, as indicated by the generated reference index mapping.
  • Example 4 is an apparatus including the subject matter of examples 1 -3, including or omitting elements, wherein the processing circuit is further configured to generate a downlink signal for subsequent transmission to a downlink (DL) UE associated therewith, wherein the downlink signal informs the DL UE about the plurality of reference indexes utilized for generating the unique IM-RS reference signals corresponding to the one or more UL UEs, and wherein the downlink signal comprises information on the one or more IM-RS reserved resource elements of the plurality of IM- RS reserved resource elements utilized for transmitting the unique IM-RS reference signals from each of the one or more UL UEs.
  • DL downlink
  • Example 5 is an apparatus including the subject matter of examples 1 -4, including or omitting elements, wherein the processing circuit is further configured to receive an interference measurement signal from the DL UE, via a receive circuit, in response to transmitting the downlink signal, wherein the interference measurement signal indicates a UE-to-UE interference caused by the unique IM-RS reference signals of the one or more UL UEs to the DL UE.
  • Example 6 is an apparatus including the subject matter of examples 1 -5, including or omitting elements, wherein the processing circuit is further configured to schedule a UL UE of the one or more UL UEs and the DL UE together for full duplex transmission, based on the received interference measurement signal.
  • Example 7 is an apparatus for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using interference measurement reference signals (IM-RS), comprising a memory circuit configured to store information on a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the predetermined IM-RS reserved resource element allocation comprises information on a plurality of IM-RS reserved resource elements employed for transmitting IM-RS reference signals associated with a plurality of UL UEs in the cellular network; and a processing circuit configured to receive a UE configuration signal comprising information on one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements to be utilized for transmitting an IM-RS reference signal associated with the UL UE, from an eNodeB via a receive circuit, wherein the UE configuration signal configures the UL UE to generate the IM-RS reference signal associated with the UL UE; generate the IM-RS reference signal based on the received UE configuration
  • Example 8 is an apparatus including the subject matter of example 7, wherein the memory circuit further comprises information on a plurality of predefined IM-RS reference sequences having a respective reference index associated therewith, for generating IM-RS reference signals associated with one or more UL UEs of the plurality of UL UEs in the cellular network.
  • Example 9 is an apparatus including the subject matter of examples 7-8, including or omitting elements, wherein the UE configuration signal from the eNodeB further comprises information on a reference index that identifies a predefined IM-RS reference sequence of the plurality of predefined IM-RS reference sequences, for generating the IM-RS reference signal associated with the UL UE.
  • Example 10 is an apparatus for use in a downlink (DL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using
  • DL downlink
  • UE user equipment
  • IM-RS interference measurement reference signals
  • IM-RS interference measurement reference signals
  • a memory circuit configured to store information comprising a predetermined IM-RS reserved resource element allocation of an LTE frame structure, wherein the predetermined IM-RS reserved resource element allocation comprises a plurality of IM-RS reserved resource elements employed for transmitting IM-RS reference signals associated with a plurality of UL UEs in the cellular network; and a processing circuit configured to receive a downlink signal comprising information on one or more IM-RS reserved resource elements of the plurality of IM-RS reserved resource elements utilized for transmitting the IM-RS reference signals from one or more UL UEs of the plurality of UL UEs, from an eNodeB via a receive circuit; receive the IM-RS reference signals associated with the one or more UL UEs, transmitted using the one or more reserved resource elements of the plurality of reserved resource elements of the LTE frame structure, in response to receiving the downlink signal; and determine an interference power associated with the IM-RS reference signals received
  • Example 1 1 is an apparatus including the subject matter of example 10, wherein the downlink signal from the eNodeB further comprises information that identifies IM-RS reference sequences associated with the IM-RS reference signals received from the one or more UL UEs and the determined interference power comprises information on individual interference powers associated with IM-RS reference sequences of the received IM-RS reference signals.
  • Example 12 is an apparatus for use in an eNodeB of a full duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM), comprising a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI-IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network; and a processing circuit configured to generate a UE configuration signal comprising information on one or more reserved resource elements of the plurality of CSI-IM reserved resource elements to be utilized for transmitting the CSI-IM reference signals or data signals associated with the one or more UL UEs; and provide the UE configuration signal to a transmit circuit for subsequent transmission to a select UL UE of the one or more UL UEs in the cellular network, wherein the UE configuration signal is configured
  • Example 13 is an apparatus including the subject matter of example 12, wherein the UE configuration signal is configured to configure the select UE to selectively generate the CSI-IM reference signal, when the select UE is scheduled for simultaneous transmission with a DL UE associated therewith.
  • Example 14 is an apparatus including the subject matter of examples 12-1 3, including or omitting elements, wherein the processing circuit is further configured to provide the UE configuration signal to a transmit circuit for subsequent transmission to the one or more UL UEs of the plurality of UL UEs, wherein the UE configuration signal configures each of the one or more UL UEs to transmit a data signal associated therewith, using the one or more reserved resource elements, as dictated by the UE configuration signal, in order to enable a downlink (DL) UE associated therewith to determine an overall UE-to-UE interference associated with the DL UE.
  • DL downlink
  • Example 15 is an apparatus including the subject matter of examples 12-14, including or omitting elements, wherein the UE configuration signal is configured to selectively mute intra cell UL UEs of the one or more UL UEs associated with the DL UE, in order to enable the DL UE to determine an inter cell UE-to-UE interference associated with the DL UE.
  • Example 16 is an apparatus including the subject matter of examples 12-1 5, including or omitting elements, wherein the processing circuit is further configured to generate a downlink signal for subsequent transmission to the downlink (DL) UE associated therewith, via a transmit circuit, wherein the downlink signal informs the DL UE on the one or more CSI-IM reserved resource elements utilized for transmitting the CSI-IM reference signal associated with the select UE, in order to enable the downlink UE to measure a UE-to-UE interference associated with the CSI-IM reference signal of the select UE.
  • DL downlink
  • the processing circuit is further configured to generate a downlink signal for subsequent transmission to the downlink (DL) UE associated therewith, via a transmit circuit, wherein the downlink signal informs the DL UE on the one or more CSI-IM reserved resource elements utilized for transmitting the CSI-IM reference signal associated with the select UE, in order to enable the downlink UE to measure a UE-to-UE interference associated with the CSI-IM reference signal of the
  • Example 17 is an apparatus including the subject matter of examples 12-1 6, including or omitting elements, wherein the processing circuit is further configured to receive an interference measurement signal from the DL UE via a receive circuit, in response to transmitting the downlink signal, wherein the interference measurement signal indicates a UE-to-UE interference caused by the CSI-IM reference signal of the select UE, to the DL UE.
  • Example 18 is an apparatus including the subject matter of examples 12-1 7, including or omitting elements, wherein the processing circuit is further configured to generate a downlink signal for subsequent transmission to the downlink (DL) UE associated therewith, via a transmit circuit, wherein the downlink signal informs the DL UE on the one or more CSI-IM reserved resource elements utilized for transmitting the data signals associated with the one or more UL UEs, in order to enable the downlink UE to measure a UE-to-UE interference associated with the data signals of the one or more UL UEs.
  • DL downlink
  • Example 19 is an apparatus including the subject matter of examples 12-1 8, including or omitting elements, wherein the processing circuit is further configured to receive an interference measurement signal from the DL UE via a receive circuit, in response to transmitting the downlink signal, wherein the interference measurement signal indicates a UE-to-UE interference caused by the data signals of the one or more UL UEs, to the DL UE.
  • Example 20 is an apparatus for use in an uplink (UL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM), comprising a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI-IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network; and a processing circuit configured to receive a UE configuration signal comprising
  • CSI-IM channel state information measurement
  • the UE configuration signal configures the UL UE to selectively generate the CSI-IM reference signal or the data signal associated with the UL UE; generate the CSI- IM reference signal or the data signal, in response to receiving the UE configuration signal; and provide the generated CSI-IM reference signal or the data signal to a transmit circuit for subsequent transmission using the one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements dictated by the UE configuration signal.
  • Example 21 is an apparatus including the subject matter of example 20, wherein the processing circuit is configured to generate the CSI-IM reference signal based on a cell ID of the UL UE, in accordance with a predetermined algorithm.
  • Example 22 is an apparatus for use in a downlink (DL) user equipment (UE) of a full duplex cellular network, that facilitates interference measurement using channel state information measurement (CSI-IM), comprising a memory circuit configured to store information comprising a predetermined CSI-IM reserved resource element allocation of an LTE frame structure, wherein the predetermined CSI-IM reserved resource element allocation comprises a plurality of CSI-IM reserved resource elements employed for transmitting CSI-IM reference signals or data signals associated with one or more uplink (UL) UEs of a plurality of UL UEs in the cellular network; and a processing circuit configured to receive a downlink signal comprising information on one or more CSI-IM reserved resource elements of the plurality of CSI-IM reserved resource elements utilized for transmitting a CSI-IM reference signal associated with a select UL UE or data signals from one or more UL UEs of the plurality of UL UEs, from an eNodeB via a receive circuit; receive the CSI-IM reference signal associated with
  • Example 23 is an apparatus including the subject matter of example 22, wherein the select UE comprises a scheduled UL UE, scheduled for simultaneous transmission with the DL UE and wherein the interference power associated with the CSI-IM reference signal of the select UL UE determined at the processing circuit is subsequently utilized for decoding of DL data at the DL UE.
  • Example 24 is an apparatus including the subject matter of examples 22-23, including or omitting elements, wherein the processing circuit is further configured to provide the determined interference power associated with the data signals of the one or more UL UEs to a transmit circuit for subsequent transmission to the eNodeB, wherein the determined interference power corresponds to an overall UE-to-UE interference caused by the one or more UL UEs to the DL UE.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, but, in the alternative, processor can be any conventional processor, controller, microcontroller, or state machine.

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Abstract

L'invention concerne un appareil destiné à être utilisé dans un nœud B évolué (eNodeB) d'un réseau cellulaire en duplex intégral et comprend un circuit de mémoire configuré pour mémoriser des informations comprenant une attribution d'éléments de ressources réservés IM-RS prédéfinis d'une structure de trame LTE, comprenant une pluralité d'éléments de ressources réservés IM-RS pour transmettre des signaux de référence IM-RS associés à un ou plusieurs équipements utilisateur (UE) de liaison montante (UL) d'une pluralité d'UE UL dans le réseau cellulaire. L'appareil comprend en outre un circuit de traitement configuré pour générer et transmettre un signal de configuration d'UE au ou aux UE UL dans le réseau cellulaire; le signal de configuration d'UE configure le ou les UE UL pour générer un signal de référence IM-RS unique respectif associé au ou aux UE UL, pour une transmission ultérieure à l'aide du ou des éléments de ressources réservés IM-RS de la pluralité d'éléments de ressources réservés IM-RS.
PCT/US2016/024897 2016-03-30 2016-03-30 Mesure de signal de référence et d'interférence pour un planificateur joint dans des systèmes cellulaires en duplex intégral WO2017171746A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680083340.2A CN109565382B (zh) 2016-03-30 2016-03-30 用于全双工蜂窝系统中联合调度器的参考信号和干扰测量
PCT/US2016/024897 WO2017171746A1 (fr) 2016-03-30 2016-03-30 Mesure de signal de référence et d'interférence pour un planificateur joint dans des systèmes cellulaires en duplex intégral

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PCT/US2016/024897 WO2017171746A1 (fr) 2016-03-30 2016-03-30 Mesure de signal de référence et d'interférence pour un planificateur joint dans des systèmes cellulaires en duplex intégral

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WO2017171746A1 true WO2017171746A1 (fr) 2017-10-05

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WO2022128087A1 (fr) * 2020-12-16 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Planification conjointe d'une liaison montante/liaison descendante (dl/ul) et sélection de paramètres pour des dispositifs à liaisons multiples de points d'accès (ap) à émission et réception simultanées (str) contraintes
EP3977775A4 (fr) * 2019-05-30 2023-06-28 Qualcomm Incorporated Rétroaction d'informations d'état de canal en duplex intégral

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US10833832B2 (en) 2016-06-22 2020-11-10 Intel Corporation Communication device and a method for full duplex scheduling
EP3913957A4 (fr) * 2019-02-28 2022-04-20 Huawei Technologies Co., Ltd. Procédé de configuration d'un signal de référence en duplex intégral, terminal et station de base
EP3977775A4 (fr) * 2019-05-30 2023-06-28 Qualcomm Incorporated Rétroaction d'informations d'état de canal en duplex intégral
WO2022128087A1 (fr) * 2020-12-16 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Planification conjointe d'une liaison montante/liaison descendante (dl/ul) et sélection de paramètres pour des dispositifs à liaisons multiples de points d'accès (ap) à émission et réception simultanées (str) contraintes

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