WO2023144838A1 - « système et procédé de signalisation à l'aide de répéteurs intelligents » - Google Patents
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- WO2023144838A1 WO2023144838A1 PCT/IN2023/050064 IN2023050064W WO2023144838A1 WO 2023144838 A1 WO2023144838 A1 WO 2023144838A1 IN 2023050064 W IN2023050064 W IN 2023050064W WO 2023144838 A1 WO2023144838 A1 WO 2023144838A1
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000011664 signaling Effects 0.000 title abstract description 3
- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000001413 cellular effect Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000000737 periodic effect Effects 0.000 claims description 7
- 230000003044 adaptive effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000007727 signaling mechanism Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
Definitions
- the present invention relates to smart repeaters, and more particularly to signalling mechanisms for smart repeaters.
- Repeaters are configured to receive Radio Frequency (RF) signals from a node, amplify the RF signals, and forward the RF signals to another node.
- the repeaters merely amplify incoming RF signals and re-transmit the RF signals without decoding, and therefore the repeaters do not have any knowledge about content of the RF signals.
- the repeaters are generally used as a low cost device to enhance coverage region by increasing signal strength of the RF signals.
- the repeaters, used in Long Term Evolution or New Radio networks are omni-directional, i.e. does not have beamforming capability. Due to lack of beamforming capability, the repeaters may introduce unnecessary interference to other nodes. Further, devices used in NR networks operate in millimeter wave frequencies where the beamforming capability is necessary.
- a control information may be required to control beamforming of the repeater.
- a repeater that is capable of performing certain functions like beamforming is known as a Smart Repeater.
- the Smart Repeater receives control information from a Base Station to form a directional beam.
- a general objective of the present invention is to provide signalling mechanisms for operating a Smart Repeater in conjunction with a Base Station in a cellular network, to improve the overall performance of the cellular network.
- Another objective of the present invention is to provide configuration information to a Smart Repeater according to its capability, for efficient operation of the Smart Repeater.
- Another objective of the present invention is to identify a Smart Repeater by a Base Station using a unique identifier.
- Still another objective of the present invention is to provide a method of controlling power of a Smart Repeater to reduce interference between beams generated by adjacent nodes.
- the present invention relates to a method of communication in a cellular network.
- the method may comprise receiving, by a Smart Repeater (SR), at least one first signal from at least one first node.
- the at least one first signal comprises configuration information for configuring the SR to perform reception of at least one second signal from one or more of the at least one first node and at least one second node and transmission of the at least one second signal to one or more of the at least one first node and the at least one second node.
- the configuration information comprises beamforming configuration having one or more of at least one beam identity (ID) and at least one time resource.
- ID beam identity
- the method further comprises forming, by the SR, at least one beam towards one or more of the at least one first node and the at least one second node based on the configuration information.
- the at least one beam is identified by the beam ID.
- the at least one first node is one of a Base Station (BS), an Integrated Access and Backhaul (IAB) node, and a Distributed Unit (DU)
- the at least one second node is one of the SR, an IAB node, a DU, and a User Equipment (UE).
- BS Base Station
- IAB Integrated Access and Backhaul
- DU Distributed Unit
- UE User Equipment
- the at least one first signal is received by a control unit of the SR.
- the at least one second signal is received, amplified using a Radio
- Frequency (RF) amplifier and transmitted from the SR.
- the method further comprises transmitting, by the control unit of SR, the feedback signal to the at least one first node.
- control unit supports at least one of an uplink control channel and an uplink data channel.
- control unit performs at least one of LI layer, L2 layer, and L3 layer functionalities.
- the at least one first signal is received based on capability information of the SR.
- the capability information is transmitted by the SR to the at least one first node.
- the capability information of the SR comprises one or more of a fixed beam and an adaptive beam for performing at least one of receiving the at least one second signal from at least one of the at least one first node and the at least one second node and transmitting the at least one second signal to at least one of the at least one first node and the at least one second node.
- the adaptive beam is semi-static or dynamic.
- the capability information comprises at least one of a configuration of at least one antenna installed in the SR, an oversampling factor of the beam, a frequency and bandwidth supported by the SR, one of Time Division Duplexing (TDD) capability and Frequency Division Duplexing (FDD) capability of the SR, a number of beams supported for communication between at least one of the SR and the at least one first node, and the SR and the at least one second node, beam identifiers (IDs) for communication between at least one of the SR and the at least one first node, and the SR and the at least one second node, switching time or switching delay between the downlink (DL) operation and the uplink (UL) operation, a beamwidth of the beam, and information indicating presence of the SR.
- TDD Time Division Duplexing
- FDD Frequency Division Duplexing
- the information indicating presence of the SR is transmitted using RRCSetUpComplete message.
- the SR is identified by the at least one first node using a Radio Network Temporary Identifier (RNTI).
- RNTI Radio Network Temporary Identifier
- a channel carrying the at least one first signal is scrambled by the at least one first node using the RNTI dedicated for the SR.
- the configuration information is provided using at least one of a Radio Resource Control (RRC), a Medium Access Control (MAC), a Downlink Control Information (DCI), and Sidelink Control Information (SCI).
- RRC Radio Resource Control
- MAC Medium Access Control
- DCI Downlink Control Information
- SCI Sidelink Control Information
- the beamforming configuration comprises at least one of a periodic beam indication and an aperiodic beam indication.
- the periodic beam indication comprises at least one of at least one periodicity value and a priority indicator.
- the periodic beam indication configures the SR to transmit at least one Synchronisation Signal Block (SSB) signal periodically.
- SSB Synchronisation Signal Block
- the SR is attached with the at least one first node using the at least one SSB signal.
- the at least one time resource comprises at least one of a time duration for which the SR activates the at least one beam ID and a time unit number or a time offset indicating time instant to activate the at least one beam ID.
- at least one of the time offset and the time duration is defined in terms of at least one of number of symbols and number of slots.
- the beamforming configuration is utilized to de-activate the at least one beam.
- the beamforming configuration further comprises is at least one of a precoder from a codebook, a number of beams to be formed simultaneously, a number of at least one of transmit-receive units, antenna elements, and antenna ports to be activated, weights at the antenna elements, and a bitmap indicating active beams.
- the at least one beam ID is mapped by the at least one first node to Channel State Information-Reference Signal (CSI-RS) Resource ID associated with an at least one corresponding CSI-RS beam.
- CSI-RS Channel State Information-Reference Signal
- the at least one beam ID is selected for communicating with the at least one second node, based on at least one Channel State Information-Reference Signal Resource Indicator (CRI) feedback from the at least one second node.
- CRI Channel State Information-Reference Signal Resource Indicator
- the configuration information further comprises at least one of scheduling configuration for receiving or transmitting the at least one second signal by the SR, feedback configuration for transmitting a feedback signal by the SR to the at least one first node, transmit power configuration for transmitting the at least one second signal by the SR and priority indication.
- the priority indication is provided for at least one of a time unit and the beam ID.
- the feedback configuration comprises at least one of time resource for transmitting the feedback signal, wherein the time resource is a time offset, frequency resource for transmitting the feedback signal, at least one operation for which the feedback signal is transmitted, and an information about multiplexing the feedback signal.
- the time offset starts after one of reception of the at least one first signal, decoding of the at least one first signal, and transmission of the at least one second signal.
- the at least one operation comprises decoding of the at least one first signal and transmission of the at least one second signal by the SR.
- the at least one operation is in at least one of at least one time resource and at least one frequency resource.
- the information comprises one or more of at least one operation for which the SR has to send feedback signal multiplexed in the same time and frequency resource, at least one time resource for which the SR has to send feedback signal multiplexed in the same time and frequency resource, at least one operation for which the SR has to send a single feedback signal, and at least one time resource for which the SR has to send a single feedback signal.
- the multiplexing is performed such that orthogonality is maintained in code domain.
- the code domain comprises cyclically shifted Reference Signals (RS) with same base sequence.
- RS Reference Signals
- the time offset is predefined in the standards.
- the SR transmits the feedback signal based on the feedback configuration for the at least one operation.
- the at least one operation comprises decoding of the first signal or transmission of the at least one second signal by the SR.
- the feedback signal is transmitted by the control unit of the SR.
- the feedback signal is transmitted using at least one of Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH).
- the feedback signal comprises at least one of Hybrid Automatic Repeat Request - Acknowledgement (HARQ-ACK) and Hybrid Automatic Repeat Request - Negative Acknowledgement (HARQ-NACK).
- HARQ-ACK Hybrid Automatic Repeat Request - Acknowledgement
- HARQ-NACK Hybrid Automatic Repeat Request - Negative Acknowledgement
- the feedback signal is transmitted in form of the HARQ-ACK when the operation is successful by the SR.
- the feedback signal is transmitted in form of the HARQ-NACK when the at least one first signal is not decoded by the SR during a pre-configured reception period of the at least one first signal or transmission of at least one second signal is not performed according to the configuration information.
- the scheduling configuration indicates the SR to operate in at least one of a DL mode, an UL mode, a flexible (F) mode, an ON mode, and an OFF mode.
- the scheduling configuration further indicates the SR to operate in at least one of a DL mode, a UL mode, a flexible (F) mode, an ON mode and an OFF mode for at least one of time instant, time duration and periodicity.
- the time duration is one of a number of subframes, a number of slots, a number of symbols, a number of frames, seconds, and milliseconds.
- the time instant is a time unit number or a time offset.
- the time unit number is one of slot number, subframe number, and frame number.
- the flexible (F) mode indicates the SR to operate in OFF mode.
- the flexible (F) mode is dynamically configured, by the first node, as one of DL mode and UL mode.
- one of the control unit (114) and the RF amplifier (116) is active at SR (102) during the OFF mode.
- the SR remains in an idle state for a time duration and performs at least one of transmitting of high priority signals when the off state overlaps with a time duration for transmitting high priority signals and monitoring of the at least one first signal when the off state overlaps with a duration of monitoring the at least one first signal.
- the high priority signals are SSB signals.
- the high priority signals are determined by the SR based on the priority indication.
- the transmit power configuration is a power value or a power offset from a reference power value.
- the transmit power configuration is provided for at least one beam of the SR.
- the power offset is indicated as an index of a vector comprising a plurality of power offset values.
- the reference power value is one of a maximum transmit power at the SR for transmitting the at least one second signal, a fixed configured transmit power at the SR for transmitting the at least one second signal, and a transmit power at the SR for transmitting the at least one second signal at a time instant.
- the time instant is indicated by the at least one first node to the SR.
- FIG. 1 illustrates an architecture of a cellular network utilizing a Smart Repeater for providing communication between a Base Station and User Equipments, in accordance with an embodiment of the present invention.
- Fig. 2 illustrates a scenario of interference between two adjacent beams in a cellular network, in accordance with an embodiment of the present invention.
- FIG. 3 illustrates a flow chart of a method of communication between a Base Station and User Equipment through a Smart Repeater, in accordance with an embodiment of the present invention.
- FIG. 1 illustrates an architecture of a cellular network 100 utilizing a Smart Repeater (SR) 102 for providing communication between a Base Station (BS) 104 and User Equipments (UEs) 106-1, 106-2, in accordance with an embodiment of the present invention.
- the UEs 106-1, 106-2 may be present in a coverage area 108 of the SR 102.
- the SR 102 may serve a first UE 106-1 through a first beam 110-1 and may serve a second UE 106-2 through a second beam 110-2.
- the first UE 106-1 and the second UE 106-2 may be collectively referred as the UE 106.
- the SR 102 uses a third beam 112 for communicating with the BS 104.
- the SR 102 may include a control unit 114 and a Radio Frequency (RF) amplifier 116.
- the control unit 114 may communicate with the BS 104 .
- the control unit 114 is configured to operate in one or more layers of a protocol stack, such as LI layer, L2 layer, and L3 Layer.
- the RF amplifier 116 may perform amplification of signals received from the BS 104 and the UE 106 and may forward the signals to the UE 106 and BS 104.
- the present invention relates to signalling mechanisms for efficient operation of the SR 102 in conjunction with the BS 104 present in the cellular network 100.
- the SR 102 may transmit its capability information to the BS 104 through the BS beam 112.
- the capability information may indicate beamforming capability of the SR 102.
- the beamforming capability may be defined based on a mode of operation of the SR 102.
- the mode of operation may be classified into three modes such as a fixed beam mode, a semi-static mode, and a dynamic mode.
- a fixed beam mode once the SR 102 is connected to the BS 104, the beam 110 to be formed toward the UE 106 may be fixed within a specific coverage area.
- the fixed beam mode is generally used to serve the UE 106 present inside a building or a closed area.
- the SR 102 may be connected with the UE 106 for a first time period and may be disconnected from the UE 106 for a second time period.
- the SR 102 may be capable of semi- statically adapting the beam 110 toward the UE 106.
- the BS 104 may control beamforming of the SR 102 through control information sent over a control channel.
- the BS 104 may not always serve the UE 106 through the SR 102, but, in some instances, the BS 104 may serve the UE 106 directly through a Non-Line-Of-Sight (NLOS) path.
- the SR 102 is “ON” for the UE 106 for a certain period of time during which the BS 104 may serve the UE 106 through the beam 110.
- the SR 102 is “OFF” for a certain duration of time during which the BS 104 may directly serve the UE 106.
- the beam 110 may be adaptive within a specific time period.
- the BS 104 instructs the SR 102 to adapt the beam 110 within very short duration of time such as every slot level.
- the beam to be formed toward the BS 104 and the UE 106 may be fixed within a specific coverage area.
- the SR 102 may be connected with the BS 104 and UE 106 for a first time period and may be disconnected from the BS 104 and UE 106 for a second time period.
- the third beam 112 and/or the beam 110 may be adaptive within a specific time period.
- the beamforming capability may include at least one of a configuration of an antenna installed in the SR 102, an oversampling factor of the beam 110 and/or third beam 112, a frequency and bandwidth support of the SR 102, Time Division Duplexing (TDD) capability or Frequency Division Duplexing (FDD) capability of the SR 102, a number of beams simultaneously supported for communication between the BS 104 and the UE 106, beam identifiers (IDs) for communication with the BS 104 and the UE 106, switching delays between a downlink (DL) operation and an uplink (UL) operation, and a beamwidth of the beam 110 and/or third beam 112.
- TDD Time Division Duplexing
- FDD Frequency Division Duplexing
- the BS 104 may receive the capability information of the SR 102 and may generate a control signal based on the capability information.
- the control signal may comprise configuration information for configuring the SR 102 for communicating with the UE 106.
- the configuration information may comprise at least one of beamforming configuration, scheduling configuration, feedback configuration, transmit power configuration, and priority indication.
- the beamforming configuration is for receiving signals from the BS 104 and forwarding it to the UE 106, and vice versa.
- the signal comprises at least one of data signal, control signal for the UE 106, Reference Signal (RS), a Synchronization Signal Block (SSB), and a Random Access Channel (RACH).
- RS Reference Signal
- SSB Synchronization Signal Block
- RACH Random Access Channel
- the priority indication may be provided along with any of the configuration information for a time unit.
- the priority indication may indicate, to the SR 102, a priority of the configuration provided or an operation configured in the time unit. For example, if the SR 102 is configured with a beam ID in slot n and is intended for transmission of the SSB, then the BS 104 indicates slot n as high priority. The BS 104 may transmit the control signal to the SR 102.
- the SR 102 may receive the control signal from the BS 102 and may extract the configuration information from the control signal.
- the SR 102 may form the beam 110 toward the UE 106 based on the configuration information.
- the BS 104 may establish a connection with the UE 106 through the beam 110 of SR 102. The connection is established for communication between the BS 102 and the UE 106 through the SR 104.
- the SR 102 may receive the DL signal from the BS 104 and may forward the DL signal to the UE 106.
- the DL signal may be amplified by the RF amplifier 116 before forwarding it to the UE 106.
- the SR 102 may receive the UL signal from the UE 106 and forward it to the BS 104.
- the UL signal may be amplified by the RF amplifier 116 before forwarding it to the BS 104.
- the SR 102 may transmit a feedback signal in response to the control signal.
- the feedback signal comprises at least one of an acknowledgement of receiving the control signal and an acknowledgement of forwarding the DL signal and the UL signal based on the control signal.
- the SR 102 may receive the control signal from the BS 104 through the control unit 114 and may transmit the feedback signal to the BS 104 through the control unit 114.
- the SR 102 may inform its identity to the BS 104 through an RRCSetUpComplete message.
- the BS 104 may generate a Radio Network Temporary Identifier (RNTI).
- RNTI Radio Network Temporary Identifier
- the SR 102 may be identified by the BS 104 using the RNTI.
- the RNTI is unique for each SR 102.
- a channel carrying the control signal may be scrambled by the BS 104 using the RNTI dedicated for the SR 102.
- the BS 104 may configure the SR 102 using beamforming configuration.
- the beamforming configuration may comprise a beam identity (ID) and a time resource.
- the time resource may comprise a time duration for which the SR 102 activates the beam ID.
- the beam ID may be activated in each time resource.
- the time offset and the time duration may be defined in terms of at least one of number of symbols and number of slots.
- the configuration may be semi-static in case of signals or channels are semi-statically or periodically configured to the UE 106. For example, forwarding the SSB to the UE 106, the BS 104 may configure SR 102 with the beam ID, a periodicity, and a starting time.
- the SR 102 may form beams in periodic intervals and may forward the SSB transmitted by the BS 104.
- the beamforming configuration may be provided to the SR 102 dynamically based on scheduling of the UE 106.
- the beamforming configuration is provided to the SR 102 using a codebook.
- the codebook may be stored in the BS 104 and the SR 102.
- the BS 104 may instruct the SR 102 to use a specific precoder or a set of precoders from the codebook during transmission of the beam.
- the beamforming configuration may be provided to the SR 102 using a number of beams.
- the BS 104 may instruct the SR 102 to form multiple beams simultaneously for communicating with the UE 106.
- the beamforming configuration may be provided to the SR 102 using an antenna configuration of the SR 102.
- the BS 104 may instruct the SR 102 to form the beam 110 based on configuration of antenna elements or ports of the SR 102.
- the beamforming configuration may be provided to the SR 102 using beam IDs of different beams.
- the BS 104 may instruct the SR 102 to activate a specific beam during the transmission of signal/channel.
- the specific beam may be identified by a corresponding beam ID.
- the beamforming configuration may be provided to the SR 102 using a bitmap.
- the BS 104 may transmit a bitmap of length equal to a total number of beams that can be formed by the SR 102.
- the location in bitmap corresponding to the active beams may be indicated by “1” and other locations in the bitmap may be indicated by “0”.
- the UE 106 in the coverage area 108 may measure parameters of the SSB and report them back to BS 104, either directly or through the SR 102.
- the SSB may be identified by the UE 106 using the SSB index and the SSB index may be reported to the BS along with the parameters.
- the SSB index of the SSB forwarded by the SR 104 may be same as the SSB index of the SSB transmitted by the BS 104. Therefore, the BS 104 cannot differentiate whether the parameters reported by the UE 106 corresponds to the SSB forwarded by the SR or the SSB transmitted by the BS.
- the BS 104 cannot identify whether the UE 106 is latched directly to the BS 104 or through the SR 102.
- the BS 104 may inform the SR 102 to de-activate beams for certain time units e.g., slots or a time duration.
- the BS 104 may transmit a beamforming configuration information to the SR 102.
- the beamforming configuration information may indicate one of activation or deactivation of the beam 110 in each time unit.
- the beamforming configuration information may be transmitted in form of at least one of the beam ID, the codebook, the number of antenna elements, weights of the antenna elements, and the bitmap.
- the SR 102 may be connected to the BS 104 through a Channel State Information-Reference Signal (CSI-RS) beam.
- a beam ID may be mapped to each CSI-RS- Resourceld associated with corresponding CSI-RS beam.
- the beam 110 may be selected for communicating with the UE 106, based on one of a beam ID and CSI-RS Resource Indicator (CRI).
- the beam 110 is used for a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH).
- PDSCH Physical Downlink Shared Channel
- PUSCH Physical Uplink Shared Channel
- the BS 104 may transmit a Time Division Duplexed (TDD) scheduling configuration to the SR 102.
- the TDD scheduling configuration information may indicate an operation to be performed by the SR 102 for a specific duration.
- the specific duration may be defined in form of a number of symbols, a number of subframes, a number of slots, a number of frames, seconds, or milliseconds.
- the operation of the SR 102 may indicate one or more of a DL state, a UL state, a flexible (F) state, an on state and an off state.
- the TDD scheduling configuration may be provided using at least one of a Radio Resource Control (RRC), a Medium Access Control (MAC), a Downlink Control Information (DCI), and Sidelink Control Information (SCI).
- RRC Radio Resource Control
- MAC Medium Access Control
- DCI Downlink Control Information
- SCI Sidelink Control Information
- the SR 102 may remain in an idle state for a first time duration and may perform forwarding of high priority signals to the UE 106 when the first time duration overlaps with a time duration for forwarding the high priority signals.
- the high priority signals may be determined by the SR 102 based on the priority indication from the BS 104. Further, the SR 102 may monitor the control signal when the first time duration overlaps with a duration of monitoring the control signal.
- the SR may be in OFF state in resources configured as F state.
- the resources configured as F state may be configured dynamically as DL state or UL state by the BS.
- the SR 102 may transmit a feedback signal to the BS 104 in response to the control signal or transmitting second signal based on the control signal.
- the feedback signal is transmitted by the control unit 114 of the SR 102.
- the feedback signal may be transmitted using a Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH).
- the feedback signal may be transmitted in form of a Hybrid Automatic Repeat Request - Acknowledgement (HARQ-ACK) when the control signal is received successfully by the SR 102 during the reception period of control signal or the control signal is decoded successfully by the SR 102 or second signal is successfully transmitted by the SR 102 according to the control signal.
- HARQ-ACK Hybrid Automatic Repeat Request - Acknowledgement
- the feedback signal may be transmitted in form of a Hybrid Automatic Repeat Request - Negative Acknowledgement (HARQ-NACK) when the control signal cannot be decoded by the SR 102 or the control signal is not received during a reception period of the control signal or the second signal is not transmitted based on the control signal.
- HARQ-NACK Hybrid Automatic Repeat Request - Negative Acknowledgement
- the SR 102 may transmit feedback signal based on the configuration provided by the BS 104.
- the configuration may comprise scheduling information of the feedback signal, an operation for which the SR 102 should send the feedback signal, and information about multiplexing feedback signal.
- the scheduling information may comprise time and frequency resources for transmission of the feedback signal.
- the time resource may be a time offset and may be counted after performing the operation.
- the operation may comprise reception of control signal, decoding of the control signal or transmission of second signal according to the control signal.
- the information about multiplexing may comprise the set of time resources or the set of operations for which the feedback signal has to be sent in same time frequency resource.
- the information about multiplexing may comprise the set of time resources or the set of operations for which a single feedback signal has to be sent.
- FIG. 2 illustrates a scenario of interference between two adjacent beams in a cellular network 200, in accordance with an embodiment of the present invention.
- another BS 202 may be present adjacent to the BS 104.
- the BS 104 may serve the the first UE 106-2 through SR 102 using the first beam 110-1 of SR 102, and the BS 202 may serve the UE 106-1 using a beam 204.
- an interference may occur at the first UE 106-1.
- the BS 104 detect that the first beam 110-1 from the SR 102 is interfering with the beam 204 from the BS 202, the BS 104 may manage the interference caused by the first beam 110-1 and the beam 204.
- the BS 104 may transmit power control information for the first beam 110-1 to the SR 102.
- the power control information may be provided directly as a transmitted power value or as an offset from a reference power value.
- the offset may be defined in as a table and the index from a table.
- the reference power value may be maximum transmit power from the SR 102 for a reference signal or data. In another implementation, the reference power value may be a fixed configured transmit power at the SR 102 for transmitting the second signal. In another implementation, the reference power value may be a transmit power at the SR 102 for transmitting the second signal at a time instant. The time instant may be indicated by the BS 104 to the SR 102.
- the SR 102 may control power of the first beam 110-1 based on the transmit power control information, and may result in mitigation of the interference between the first beam 110-1 and the beam 204.
- Fig. 3 illustrates a flow chart 300 of a method of communication between a BS and a UE through a SR, in accordance with an embodiment of the present invention.
- the functions noted in the blocks may occur out of the order noted in the drawings.
- two blocks shown in succession in Fig. 3 may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
- Alternate implementations are included within the scope of the example embodiments in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved.
- At least one first signal may be received by at least one first node 104 (similar to the BS 104), at step 302.
- the at least one first signal may comprise configuration information for configuring the SR 102 to perform at least one of reception of at least one second signal from at least one of one or more of the at least one first node 104 and at least one second node 106 (similar to the SR 102) and transmission of the at least one second signal to one or more of the at least one first node 104 and the at least one second node 106.
- the configuration information may comprise beamforming configuration having at least one beam identity (ID) and at least one time resource. At least one beam may be formed towards one or more of the at least one first node 104 and the at least one second node 106 based on the configuration information.
- the at least one beam may be identified by the beam ID.
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Abstract
L'invention concerne un procédé (300) de communication dans un réseau cellulaire. Le procédé (300) consiste à recevoir, par un répéteur intelligent (SR) (102), un premier signal provenant d'un premier nœud (104). Le premier signal peut comprendre des informations de configuration. Le SR (102) peut recevoir un second signal du premier nœud (104) et d'un second nœud (106). Le SR (102) peut transmettre le second signal au premier nœud (104) et/ou au second nœud (106). Les informations de configuration peuvent comprendre une configuration de formation de faisceau ayant une identité (ID) de faisceau et une ressource temporelle. Le procédé (300) peut en outre consister à former, par le SR (102), un faisceau (110, 112) vers un ou plusieurs du premier nœud (104) et du second nœud (106) sur la base des informations de configuration. Le faisceau (110, 112) peut être identifié par l'ID de faisceau.
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WO2021022242A1 (fr) * | 2019-08-01 | 2021-02-04 | Qualcomm Incorporated | Procédure d'accès de répéteurs directionnels intelligents |
WO2021041527A1 (fr) * | 2019-08-27 | 2021-03-04 | Qualcomm Incorporated | Initialisation de répéteur directionnel intelligent |
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WO2021022242A1 (fr) * | 2019-08-01 | 2021-02-04 | Qualcomm Incorporated | Procédure d'accès de répéteurs directionnels intelligents |
WO2021041527A1 (fr) * | 2019-08-27 | 2021-03-04 | Qualcomm Incorporated | Initialisation de répéteur directionnel intelligent |
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