WO2018135905A1 - Procédé et dispositif pour des communications de véhicule vers tout (v2x) ainsi que procédé et équipement de transmission et de réception dans une communication v2x - Google Patents

Procédé et dispositif pour des communications de véhicule vers tout (v2x) ainsi que procédé et équipement de transmission et de réception dans une communication v2x Download PDF

Info

Publication number
WO2018135905A1
WO2018135905A1 PCT/KR2018/000907 KR2018000907W WO2018135905A1 WO 2018135905 A1 WO2018135905 A1 WO 2018135905A1 KR 2018000907 W KR2018000907 W KR 2018000907W WO 2018135905 A1 WO2018135905 A1 WO 2018135905A1
Authority
WO
WIPO (PCT)
Prior art keywords
dci
pssch
pscch
transmission
carrier
Prior art date
Application number
PCT/KR2018/000907
Other languages
English (en)
Inventor
Shichang Zhang
Yingyang Li
Yi Wang
Original Assignee
Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201710064470.8A external-priority patent/CN108616840A/zh
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to KR1020197020044A priority Critical patent/KR102592455B1/ko
Priority to US16/479,357 priority patent/US11032049B2/en
Publication of WO2018135905A1 publication Critical patent/WO2018135905A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present invention relates to communication technology and, more specifically, to a method and device for V2X communications and to a method for transmitting and receiving Sidelink Control Information (SCI) carried on a PSCCH in V2X communication and a method for measuring and decoding a PSSCH scheduled by the SCI.
  • SCI Sidelink Control Information
  • the 5G or pre-5G communication system is also called a ‘Beyond 4G Network’ or a ‘Post LTE System’.
  • the 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates.
  • mmWave e.g., 60GHz bands
  • MIMO massive multiple-input multiple-output
  • FD-MIMO Full Dimensional MIMO
  • array antenna an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.
  • RANs Cloud Radio Access Networks
  • D2D device-to-device
  • CoMP Coordinated Multi-Points
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC sliding window superposition coding
  • ACM advanced coding modulation
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • the Internet which is a human centered connectivity network where humans generate and consume information
  • IoT Internet of Things
  • IoE Internet of Everything
  • sensing technology “wired/wireless communication and network infrastructure”, “service interface technology”, and “Security technology”
  • M2M Machine-to-Machine
  • MTC Machine Type Communication
  • IoT Internet technology services
  • IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing Information Technology (IT) and various industrial applications.
  • IT Information Technology
  • 5G communication systems to IoT networks.
  • technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas.
  • MTC Machine Type Communication
  • M2M Machine-to-Machine
  • Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology.
  • RAN Radio Access Network
  • D2D Device to Device
  • 3GPP 3rd Generation Partnership Project
  • the direct communication link between a device and another device is called a sidelink, which is similar with an uplink and a downlink.
  • the former is called a Physical Sidelink Control CHannel (PSCCH), and the latter is called a Physical Sidelink Shared Channel (PSSCH).
  • PSCCH is for indicating information such as the time-frequency domain resource position of PSSCH transmission, the modulation and coding mode, and the reception target ID for the PSSCH.
  • PSSCH is for carrying data.
  • 3GPP further implements standardization of some functions supporting direct communications, with low delay and high reliability, between high-speed devices, between a high-speed device and a low-speed device, and between a high-speed device and a stationary device, i.e. Vehicle to Vehicle/Perdestrian/Infrastructure/Network(for short, V2X) communications.
  • V2X Vehicle to Vehicle/Perdestrian/Infrastructure/Network(for short, V2X) communications.
  • the V2X communications service has a natural periodicity, it is possible to generate multiple periodic services for each terminal participating in theV2X communications.
  • a Semi-Persistent Scheduling is introduced in the current standardized V2X system.
  • the eNB in the resource allocation mode controlled by the eNB in the V2X communications (Mode 3), the eNB will configure, through the RRC layer signaling, one or more SPS configurations for the UE performing the V2X communications.
  • the eNB can transmit, through a downlink control channel, a corresponding Downlink Control Information (DCI) to activate the corresponding SPS configuration; when the UE generates the service no longer, the eNB can transmit a corresponding DCI to release the SPS configuration corresponding to the service. Since the DCI format that supports SPS activation and release is different from the existing DCI format, if the DCI format and the existing DCI format are mapped to the same UE specific downlink search space, the number of times of blind detection in the UE downlink control channel will be increased.
  • DCI Downlink Control Information
  • a congestion control mechanism is also introduced in V2X, wherein the UE will adjust maximum transmit power, Modulation and Coding Scheme (MCS), maximum resource occupancy ratio, the maximum number of times of transmission and the like to adapt to current congestion level. Since in the meantime it is necessary for the UE to support open-loop power control to reduce the interference to the eNB uplink reception, the congestion control and the uplink interference control cannot be simultaneously met.
  • MCS Modulation and Coding Scheme
  • a GNSS-based synchronization mechanism is introduced in the V2X communications system.
  • a UE which is in a cellular network cell coverage and capable of accurately receiving a GNSS signal
  • a UE which is out of the cellular network cell and capable of accurately receiving a GNSS synchronization signal
  • SLSS Side Link Synchronization Signal
  • PSBCH Physical Side link Broadcast CHannel
  • a direct communication link from an equipment to an equipment is called a sidelink. Similar to the uplink and downlink links for cellular, the sidelink also has control channels and shared data channels.
  • the former is called PSCCHs, and the latter is called PSSCHs.
  • PSCCHs are used for indicating the time-frequency domain resource location and the modulation and coding scheme for PSSCH transmission, the priority of data carried on a PSSCH, or more; and the PSSCHs are used for carrying data.
  • the control information and data in the V2X communication can be transmitted by the sidelink.
  • the V2X communication includes two transmission modes, i.e., transmission mode 3 (Mode 3) and transmission mode 4 (Mode 4).
  • transmission resources for PSCCHs and PSSCHs are autonomously selected by a UE according to the result of channel detection.
  • the UE determines the time-frequency resource location and priority of the scheduled PSSCH by receiving PSCCHs transmitted by other UEs, then detects the reference signal received power of the scheduled PSSCH (PSSCH-RSRP), and excludes resources having PSSCH-RSRP greater than a specific threshold. Subsequently, the UE calculates a Sidelink-Received Signal Strength Indicator (S-RSSI) of the remaining resources and randomly selects, from part of resources having the lowest S-RSSI, a resource as a transmission resource.
  • S-RSSI Sidelink-Received Signal Strength Indicator
  • the PSSCH transmission employs only QPSK and 16QAM modulation, rather than 64QAM modulation.
  • 64QAM modulation will be supported to increase the transmission rate.
  • first-type V2X UE V2X equipment
  • second-type V2X UE V2X equipment
  • SCI Sidelink Control Information
  • the SCI has different formats, and the SCIs in various formats are collectively called SCI X.
  • the UE may be unable to correctly decode the data packet. Therefore, the UE cannot decode this data packet.
  • the 3 th , 6 th , 9 th and 12 th symbols are used for mapping demodulation reference signals (DM-RSs) and the last symbol is used as a gap, there are only eight symbols actually available for the effective transmission of data.
  • AGC Automatic Gain Control
  • a PSCCH in format of SCI X is transmitted only once, but two times of transmission of the PSSCH is scheduled.
  • the power of the PSCCH in format of SCI X is two times of the power of the PSSCH scheduled by the SCI X.
  • the existing power relationship is not optimal and needs to be improved.
  • V2X vehicle to everything
  • the configuration signaling comprising at least one of an index corresponding to a carrier C configured with Mode 3 resource pool, a carrier SC for transmission of downlink control information S-DCI_C used for scheduling sidelink transmission on the carrier C, and maximum index value n CI_m corresponding to the carrier C;
  • a device for vehicle to everything (V2X) communications comprising:
  • a first receiving module for receiving configuration signaling transmitted by the eNB, wherein the configuration signaling comprises at least one of an index n C corresponding to a carrier C configured with Mode 3 resource pool, a carrier SC for transmission of downlink control information S-DCI_C used for scheduling sidelink transmission on the carrier C, and maximum index value n CI_m corresponding to the carrier C;
  • a first determining module for determining, according to the configuration signaling, at least one of a search space corresponding to the S-DCI_C, the transmission carrier of the S-DCI_C, and the number of bits corresponding to the S-DCI_C;
  • a detection module for detecting the S-DCI_C according to at least one of the search space corresponding to the S-DCI_C, the transmission carrier of the S-DCI_C, and the number of bits corresponding to the S-DCI_C.
  • V2X vehicle to everything
  • the power control parameter comprises at least one of open-loop power control parameter, and maximum transmit power corresponding to current resource pool congestion level and the priority of data transmission;
  • another device for V2X communications comprising:
  • a second determining module for determining power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, wherein the power control parameter comprises at least one of open-loop power control parameter, and maximum transmit power corresponding to congestion level of current resource pool and a priority of data to be transmitted;
  • an adjusting module for adjusting transmit power of a Physical Sidelink Control CHannel (PSCCH) and transmit power of a Physical Sidelink Shared CHannel (PSSCH) according to the power control parameter.
  • PSCCH Physical Sidelink Control CHannel
  • PSSCH Physical Sidelink Shared CHannel
  • V2X vehicle to everything
  • SLSS Side Link Synchronization Signal
  • PSBCH Physical Sidelink Broadcast CHannel
  • a further device for V2X communications comprising:
  • a third determining module for determining, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting a Side Link Synchronization Signal (SLSS) and a Physical Sidelink Broadcast CHannel (PSBCH),
  • SLSS Side Link Synchronization Signal
  • PSBCH Physical Sidelink Broadcast CHannel
  • the third determining module further determines, according to the type of a reference synchronization source, time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted.
  • the present invention provides a method and device for V2X communications. Compared with the prior art, the present invention can determine, by receiving the configuration signaling transmitted by the eNB, at least one of a search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C and the number of bits corresponding to S-DCI_C according to the configuration signaling, and can detect S-DCI_C according to at least one of the search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C.
  • the search space of S-DCI_C can be determined, or it can be ensured that the number of bits of S-DCI_C is equal to the number of bits of any other DCI mapped to the search space, so that S-DCI_C can be detected from the corresponding search space and then the number of times of blind detection in the UE downlink control channel can be reduced.
  • the present invention determines power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, and adjusts the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter, wherein the power control parameter comprises at least one of open-loop power control parameter, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of data to be transmitted. That is, the present invention can adjust the transmit power according to current congestion level and open-loop power. That is, the control parameter used to adjust the transmit power can simultaneously satisfy the current congestion level and the uplink control, so that it can be ensured that the adjusted transmit power simultaneously satisfies the congestion control and uplink interference control requirements.
  • the present invention determines, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting the SLSS and the PSBCH, and can determine, according to the type of the reference synchronization source, specific time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted.
  • the specific time position information for the SLSS and the PSBCH to be transmitted, the identity information of the SLSS to be transmitted and the value of the inCoverage field in the PSBCH to be transmitted can be determined according to the cellular network state information and the type of the reference synchronization source, thereby avoiding interference between a UE, which is within the cellular network cell coverage and capable of accurately receiving a GNSS signal, and a UE, which is out of the cellular network cell and capable of accurately receiving a GNSS synchronization signal, or there is no interference between UEs using the above two UEs as reference synchronization sources, so that the PSBCH could be successfully detected.
  • the present application also provides a transmitting and receiving method and equipment in V2X communication in order to better realize the coexistence of a first-type V2X UE and a second-type V2X UE.
  • the present application discloses a receiving method in Vehicle to Vehicle/Pedestrian/Infrastructure/Network (V2X) communication, comprising the steps of:
  • UE User Equipment
  • PSCCH Physical Sidelink Control Channel
  • SCI Sidelink Control Information
  • PSSCH Physical Sidelink Shared Channel
  • PSSCH-RSRP reference signal received power of the PSSCH
  • S-RSSI sidelink received signal strength indicator
  • the step B comprises: determining, by a first-type V2X UE and according to a value I MCS of a Modulation and Coding Scheme (MCS) bit field of the SCI, a modulation scheme of the PSSCH of the other UEs, and correspondingly, the first-type V2X UE implements the steps C and D by at least one of the following ways:
  • MCS Modulation and Coding Scheme
  • the first-type V2X UE measures the PSSCH-RSRP of the scheduled PSSCH and/or the S-RSSI according to the parameter information of the PSCCH and then selects a transmission resource according to the measured information, and the first-type V2X UE decodes or skips decoding of the PSSCH scheduled by the PSCCH;
  • Q' m is a modulation scheme determined according to I MCS .
  • the step B comprises: determining, by the first-type V2X UE and according to a resource reservation bit field of the SCI, resource reservation information of the PSSCH of the other UEs, and correspondingly, the first-type V2X UE implements the steps C and D by the following way:
  • the first-type V2X UE measures the PSSCH-RSRP of the scheduled PSSCH and/or the S-RSSI according to the parameter information of the PSCCH, then selects a transmission resource according to the measured information, and decodes or skips decoding of the PSSCH scheduled by the PSCCH, wherein, the first-type V2X UE measures the RSSCH-RSRP based on the PSSCH scheduled by the PSCCH and does not apply the result of measurement to subframes of other subsequently transmitted PSSCHs.
  • the first-type V2X UE decides, according to the received MCS information of the PSCCH, whether a Transport Block Size (TBS) exceeds the maximum UE capability, the first-type V2X UE measures the PSSCH-RSRP of the scheduled PSSCH and/or the S-RSSI according to the information of the PSCCH, then selects a transmission resource according to the measured information, and decodes or skips decoding of the PSSCH scheduled by the PSCCH.
  • TBS Transport Block Size
  • the step B comprises: determining, by a second-type V2X UE and according to the SCI, an effective channel coding rate of the PSSCH scheduled by the received PSCCH of the other UEs;
  • the second-type V2X UE implements the selecting a transmission resource according to the measured information in the C by at least one or more of the following ways: way 1: the UE performing transmission resource selection determines, according to the modulation scheme to be used by the UE performing transmission resource selection, a threshold for the PSSCH-RSRP from other UEs. If the PSSCH-RSRP from the other UEs is greater than the threshold, during the selection of the transmission resource, resources corresponding to the PSSCH are excluded.
  • the PSSCH-RSRP threshold corresponding to a 64QAM modulation scheme is less than the PSSCH-RSRP threshold corresponding to a QPSK or 16QAM modulation scheme.
  • the UE performing transmission resource selection excludes the resources having PSSCH-RSRP greater than the PSSCH-RSRP threshold, the proportion of the remaining resources in the total resources within a resource selection window shall not be less than a specific threshold Thr_step2_ratio; the UE performing transmission resource selection calculates the sidelink received signal strength indicator (S-RSSI) of the remaining resources, and successively selects resources from the remaining resources in an ascending order, until the proportion of all the selected resources in the total resources within the resource selection window shall not be less than a specific threshold Thr_step3_ratio; and, the UE randomly selects, from the selected resources, a resource as a transmission resource.
  • the specific threshold Thr_step2_ratio and/or Thr_step3_ratio needs to be determined according to the modulation scheme to be used by the UE performing transmission resource selection.
  • the specific threshold corresponding to the 64QAM modulation scheme is less than the specific threshold corresponding to the QPSK or 16QAM modulation scheme.
  • the UE performing transmission resource selection needs to determine, according to the modulation scheme indicated by the received PSCCH from other UEs, a threshold for the PSSCH-RSRP from the other UEs.
  • the PSSCH-RSRP threshold is less than the PSSCH-RSRP threshold in which the modulation scheme indicated by the PSCCH is QPSK or 16QAM.
  • the second-type V2X UE implements the steps C and D by the following ways:
  • the second-type V2X UE measures the PSSCH-RSRP of the scheduled PSSCH and/or the S-RSSI according to the information of the PSCCH and then selects a transmission resource according to the measured information, and the second-type V2X UE decodes or skips decoding of the PSSCH scheduled by the PSCCH;
  • the second-type V2X UE does not measure the PSSCH-RSRP of the scheduled PSSCH and/or the S-RSSI according to information of the PSCCH, and may decode or skip decoding the PSSCH scheduled by the PSCCH.
  • the step B comprises: determining, by the UE, a TBS according to MCS indication information and frequency-domain resource location information of the SCI.
  • the TBS is determined by at least one of the following ways:
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N PRB , wherein, ;
  • the used ⁇ can be different.
  • TBS when I MCS >Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N PRB , wherein, ; and, when I MCS ⁇ Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N' PRB , wherein, the Th_mcs1 is a preset value.
  • the used ⁇ can be different.
  • the corresponding Th_mcs1 can be different.
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N' PRB ;
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N PRB , wherein, ; or, if the received PSCCH is from the second-type V2X UE, when I MCS >Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N PRB , wherein, ; and, when I MCS ⁇ Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the frequency-domain resource location information indicated in the received PSCCH, and the TBS is determined in a look-up table manner according to N PRB , wherein, ; and, when I MCS
  • the Th_mcs1 is the minimum I MCS corresponding to 64QAM;
  • the corresponding Th_mcs1 is respectively determined with respect to the number of PRBs possibly occupied by the PSSCH, so that, after all I MCS corresponding to 64QAM and I MCS in 16QAM possibly resulting in an effective coding rate greater than 0.93 are weighted by N' PRB , the effective coding rate of the corresponding TBS is less than or equal to 0.93;
  • the present application further provides a user equipment, comprising a control information detecting module, a parameter determining module, a transmission resource selecting module and a decoding module, wherein:
  • control information detecting module for receiving a Physical Sidelink Control Channel (PSCCH) transmitted by other UEs and detecting Sidelink Control Information (SCI) transmitted through the PSCCH;
  • PSCCH Physical Sidelink Control Channel
  • SCI Sidelink Control Information
  • the parameter determining module for determining parameter information of a Physical Sidelink Shared Channel (PSSCH) scheduled by the SCI according to the SCI,;
  • PSSCH Physical Sidelink Shared Channel
  • the transmission resource selecting module for determining, according to the parameter information of the PSSCH, whether to receive and measure PSSCH-RSRP of the PSSCH scheduled by the SCI and/or a sidelink received signal strength indicator (S-RSSI), and selecting a transmission resource according to the measured information;
  • the decoding module for receiving, according to the SCI, the PSSCH scheduled by the SCI, and determining, according to the SCI, whether to decode the PSSCH.
  • the present application further provides a method for determining channel transmitting power, comprising:
  • SCI Sidelink Control Information
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSD Power Spectrum Density
  • the PSD offset of the PSCCH relative to the PSSCH is not related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD offset of the PSCCH relative to the PSSCH is related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD of the PSSCH is determined according to the modulation scheme of the PSSCH.
  • the present invention further provides a user equipment, comprising a transmitting power determining module and a transmitting module, wherein:
  • the transmitting power determining module for determining a Power Spectrum Density (PSD) offset of the PSSCH and the PSCCH by at least one of the following ways:
  • the PSD offset of the PSCCH relative to the PSSCH is not related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD offset of the PSCCH relative to the PSSCH is related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD of the PSSCH is determined according to the modulation scheme of the PSSCH.
  • the transmitting module for performing transmission according to the power determined by the transmitting power determining module.
  • the interference level of resources possibly occupied by the opposite party can be determined according to the scheduling information of the opposite party, so that the strong-interference resources can be avoided during the selection of a transmission resource.
  • a V2X UE can determine a proper transport block size according to actually available resources, so that the transmission efficiency is improved.
  • Figure 1 is a flowchart of a method of V2X communications according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another method of V2X communications according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a further method of V2X communications according to an embodiment of the present invention.
  • Figure 4 is a schematic structure diagram of a device for V2X communications according to an embodiment of the present invention.
  • Figure 5 is a schematic structure diagram of another device for V2X communications according to an embodiment of the present invention.
  • Figure 6 is a schematic structure diagram of a further device for V2X communications according to an embodiment of the present invention.
  • Fig. 7 is a flowchart of a method for receiving a PSCCH in V2X communication according to Embodiment 20 of the present invention.
  • Fig. 8 is a flowchart of a method for receiving a PSCCH in V2X communication according to Embodiment 21 of the present invention.
  • Fig. 9 is a composition structure diagram of a preferred user equipment according to the present application.
  • Fig. 10 is a composition structure diagram of another preferred user equipment according to the present application.
  • terminal and “terminal device” as used herein include both a device with a wireless signal receiver having no capability of transmission, and a device with reception and transmission hardware capable of bi-directional communication on a bi-directional communication link.
  • Such a device may include: a cellular or other communication device having a single line display or a multi-line display or having no multi-line display; a PCS (Personal Communications Service) that can combine voice, data processing, facsimile and/or data communication capability; a PDA (Personal Digital Assistant) that may include a radio frequency receiver, a pager, an Internet/Intranet access, a web browser, a notepad, a calendar, and/or a GPS (Global Positioning System) receiver; a conventional lap top and/or palmtop computer or other device having and/or including a radio frequency receiver.
  • a cellular or other communication device having a single line display or a multi-line display or having no multi-line display
  • PCS Personal Communications Service
  • PDA Personal Digital Assistant
  • a radio frequency receiver a pager, an Internet/Intranet access, a web browser, a notepad, a calendar, and/or a GPS (Global Positioning System) receiver
  • GPS Global Positioning System
  • terminal or “terminal device” as used herein may be portable, transportable, installed in transportation (by air, sea and/or land), or adapted and/or configured to run locally and/or run in a distributed form at any other location of the earth and/or space.
  • terminal and terminal device used herein maybe a communication terminal, a network terminal, or a music/video play terminal, such as a PDA, a MID (Mobile Internet Device), and/or a mobile phone with a music/video play function, and may also be a device such as a smart TV, a set-top box and the like.
  • the embodiment of the present invention provides a method of V2X communications, as shown in Fig. 1.
  • the UE receives the configuration signaling transmitted by the eNB.
  • the configuration signaling comprises at least one of an index n c corresponding to the carrier C configured with Mode 3 resource pool, a carrier SC for transmission of downlink control information S-DCI_C used for scheduling sidelink transmission on the carrier C, and maximum index value n CI_m corresponding to the carrier C, wherein Mode 3 refers to the V2X resource allocation mode based on eNB scheduling.
  • the configuration of the resource pool using Mode 3 includes carrier frequency at which the resource pool using Mode 3 is located, a subframe set included in the resource pool, physical resource block(s) (PRB) set, and the like.
  • any carrier C configured with a resource pool for Mode3 corresponds to a unique index n c .
  • n c 1,and the values of n c are determined so on.
  • step 102 the UE determines, according to the configuration signaling, at least one of a search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C.
  • step 103 the UE detects S-DCI_C according to at least one of the search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C.
  • the embodiment of the present invention provides a method of V2X communications.
  • the embodiment of the present invention can determine, by receiving the configuration signaling transmitted by the eNB, at least one of a search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C and the number of bits corresponding to S-DCI_C according to the configuration signaling, and can detect S-DCI_C according to at least one of the search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C.
  • the search space of S-DCI_C can be determined, or it can be ensured that the number of bits of S-DCI_C is equal to the number of bits of any other DCI mapped to the search space, so that S-DCI_C can be detected from the corresponding search space and then the number of times of blind detection in the UE downlink control channel can be reduced.
  • step 102 of the UE determining, according to the configuration signaling, at least one of a search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C and the number of bits corresponding to S-DCI_C comprises at least one of steps 202-204 as follows in embodiment 2, and wherein the operations in steps 201 and 205 are similar to those in steps 101 and 103, respectively, and are not repeated herein.
  • step 202 the UE determines that the transmission carrier SC of S-DCI_C is the same as the transmission carrier of the configuration signaling.
  • step 203 the UE determines the search space corresponding to S-DCI_C based on n c and/or n CI_m .
  • the UE may determine the search space corresponding to S-DCI_C based on n c ; the UE may also determine the search space corresponding to S-DCI_C by n c and n CI_m ; and the UE may also determine the search space corresponding to S-DCI_C by n CI_m .
  • the UE determines the number of bits of S-DCI_C as specific value based on the number of subchannels of the carrier C and the bandwidth of the transmission carrier of S-DCI_C.
  • the number of bits of S-DCI_C is equal to a specific value.
  • the specific value may be equal to the number of bits of TDD DCI format 0 with a bandwidth of 5MHz defined by 3GPP Rel-8, or equal to the number of bits of DCI format 0, corresponding to SC duplex mode (FDD or TDD), with a bandwidth of 5MHz defined by 3GPP Rel-8, or equal to the number of bits of TDD DCI format 0,having CIF field, with a bandwidth of 3MHz defined by 3GPP Rel-10, or equal to the number of bits of DCI format 0, having CIF field and corresponding to SC duplex mode (FDD or TDD), with a bandwidth of 3MHz defined by 3GPP Rel-10, wherein, if the SC duplex mode is FDD, the number of bits is equal to 24, and if the SC duplex mode is TDD, the number of bits is equal to 26.
  • step 203 of the UE determining the search space corresponding to S-DCI_C based on n c and/or n CI_m comprises steps 303-304 as follows in embodiment 3, and wherein the operations in steps 301-302 and 305-306 are similar to those in steps 201-202 and 204-205, respectively, and are not repeated herein.
  • the UE determines, based on n c and/or n CI_m , at least one PDCCH that may contain the SDCI_C, and control channel elements (CCEs) of each PDCCH.
  • CCEs control channel elements
  • the UE determines, based on n c and/or n CI_m , at least one EPDCCH that may contain the SDCI_C, and enhanced control channel elements (ECCEs) of each EPDCCH.
  • ECCEs enhanced control channel elements
  • step 303 and step 304 may be performed simultaneously, or step 303 may be performed before step 304, or step 304 may be performed before step 303, which is not defined herein.
  • step 303 of the UE determining, based on n c and/or n CI_m , at least one PDCCH that may contain the SDCI_C, and control channel elements (CCEs) of each PDCCH comprises at least one of steps 403a ⁇ 403b and 403c as follows in embodiment 4, wherein step 304 of the UE determining, based on n c and/or n CI_m , at least one EPDCCH that may contain the SDCI_C, and enhanced control channel elements (ECCEs) of each EPDCCH comprises at least one of steps 404a ⁇ 404b and 404c as follows in embodiment 4, and wherein the operations in steps 401-402 and 405-406 are similar to those in steps 301-302 and 305-306, respectively, and are not repeated herein.
  • CCEs control channel elements
  • the UE determines at least one PDCCH that may contain the SDCI_C, and control channel elements (CCEs) of each PDCCH based on current slot number, the number of CCEs for PDCCH transmission in each subframe where PDCCH containing S-DCI_C may reside, the number of PDCCHs containing S-DCI_C, a radio network temporary identity (RNTI) configured for the UE, aggregation level of PDCCH scarrying S-DCI_C, and n c .
  • CCEs control channel elements
  • the UE on the carrier transmitting S-DCI_C, for any aggregation level L of PDCCHs carrying S-DCI_C, where L ⁇ 1, 2, 4, 8 ⁇ , the UE detects M (L) PDCCHs possibly containing S-DCI_C, wherein the mth PDCCH contains the CCE determined by the following formula:
  • the UE determines at least one PDCCH that may contain the SDCI_C, and CCEs of each PDCCH based on current slot number, the number of CCEs for PDCCH transmission in each subframe where PDCCH containing S-DCI_C may reside, the number of PDCCHs containing S-DCI_C, a RNTI configured for the UE, aggregation level of PDCCHs carrying S-DCI_C, and n CI_m .
  • the UE detects M (L) PDCCHs possibly containing S-DCI_C, wherein the mth PDCCH contains the CCE determined by the following formula:
  • the UE determines at least one PDCCH that may contain the SDCI_C, and CCEs of each PDCCH based on current slot number, the number of CCEs for PDCCH transmission in each subframe where PDCCH containing S-DCI_C may reside, the number of PDCCHs containing S-DCI_C, a RNTI configured for the UE, aggregation level of PDCCHs carrying S-DCI_C, n c and n CI_m .
  • the UE on the carrier transmitting S-DCI_C, for any aggregation level L of PDCCHs of S-DCI_C, where L ⁇ 1, 2, 4, 8 ⁇ , the UE detects M (L) PDCCHs possibly containing S-DCI_C, wherein the mth PDCCH contains the CCE determined by the following formula:
  • the UE determines ECCEs of each EPDCCH of at least one EPDCCH possibly containing S-DCI_C based on current slot number, the number of EPDCCHs containing S-DCI_C, a RNTI configured for the UE, aggregation level of EPDCCHs carrying S-DCI_C, and n c .
  • the UE on the carrier transmitting S-DCI_C, for any aggregation level in an EPDCCH resource block set p, where ⁇ 1,2,4,8,16,32 ⁇ , the UE detects EPDCCHs possibly containing S-DCI_C, wherein the mth EPDCCH contains the ECCE determined by the following formula:
  • n RNTI (A p ⁇ Y p,k - 1 )mod D
  • n s is current slot number
  • the value of n RNTI is a certain RNTI configured for the UE and, for example, may be C-RNTI of the UE
  • i 0,..., -1
  • m 0,..., -1
  • the value of is defined by a standard
  • N ECCE,p,k represents the number of all ECCEs for transmitting EPDCCH of the EPDCCH resource block set p in subframe k and may be determined according to relevant signaling of the eNB.
  • the UE determines ECCEs of each EPDCCH of at least one EPDCCH possibly containing S-DCI_C based on current slot number, the number of EPDCCHs containing S-DCI_C, a RNTI configured for the UE, aggregation level of EPDCCHs carrying S-DCI_C, and n CI_m .
  • the UE detects EPDCCHs possibly containing S-DCI_C, wherein the mth EPDCCH contains the ECCE determined by the following formula:
  • the UE determines ECCEs of each EPDCCH of at least one EPDCCH possibly containing S-DCI_C based on current slot number, the number of EPDCCHs containing S-DCI_C, a RNTI configured for the UE, aggregation level of EPDCCHs carrying S-DCI_C, nc and n CI_m .
  • the UE detects EPDCCHs possibly containing S-DCI_C, wherein the mth EPDCCH contains the ECCE determined by the following formula:
  • step 501 if S-DCI_C scrambled by sidelink SPSRNTI is detected and the carrier carrying S-DCI_C satisfies at least one of the preset conditions, the UE determines that the number of bits of the SPS configuration index field in S-DCI_C is 2 bits, wherein the preset conditions comprises at least one of: the transmission carrier SC of S-DCI_C is a frequency division duplex (FDD) carrier with a bandwidth of 1.4MHz; and the number of subchannels of the resource pool, for current UE Mode 3 operation, on the carrier C is 20.
  • FDD frequency division duplex
  • the UE determines that the number of bits of the SPS configuration index field in S-DCI_C is 2 bits, the number of carriers, configured for the UE, of Mode3 resource pool containing 20subchannels should be no more than 3, and n c corresponding to these carriers should also be no more than 3.
  • the UE determines that the number of bits corresponding to the SPS configuration index field in S-DCI_C is 3 bits.
  • the embodiment of the present invention further provides another method of V2X communications, as shown in Fig. 2.
  • the UE determines power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, wherein the power control parameter comprises at least one of open-loop power control parameter, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of data to be transmitted.
  • step 602 the UE adjusts the transmit power of Physical Sidelink Control CHannel (PSCCH) and the transmit power of Physical Sidelink Shared CHannel (PSSCH) according to the power control parameter.
  • PSCCH Physical Sidelink Control CHannel
  • PSSCH Physical Sidelink Shared CHannel
  • the UE may first determine whether the physical resource block(s) (PRB) occupied by the PSCCH are immediately followed by the PRB occupied by the PSSCH and then adjust the transmit power of the PSCCH and the transmit power of the PSSCH according to the determination result and the power control parameter, or the UE may directly adjust the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter.
  • PRB physical resource block
  • the embodiment of the present invention provides another method of V2X communications.
  • the embodiment of the present invention determines power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, and adjusts the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter, wherein the power control parameter comprises at least one of open-loop power control parameter, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of data to be transmitted. That is, the above embodiment can adjust the transmit power according to current congestion level and open-loop power. That is, the control parameter used to adjust the transmit power can simultaneously satisfy the current congestion level and the uplink control, so that it can be ensured that the adjusted transmit power simultaneously meets the uplink control and uplink interference control requirements.
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 702-703 as follows in embodiment 7, and wherein the operation in step 701 is similar to that in step 601 and not repeated herein.
  • step 702 if the PRBs occupied by the PSCCH are immediately followed by the PRB occupied by the PSSCH, the UE determines the adjusted transmit power of the PSCCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH, basic open-loop power of the PSCCH in current resource allocation mode of the UE, compensation for path loss of the PSCCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power corresponding to the resource pool congestion level and the priority of data to be transmitted.
  • the UE determines the adjusted transmit power of the PSCCH according to the following formula:
  • M PSCCH represents the number of PRBs for PSCCH transmission
  • M PSSCH represents the number of PRBs for PSSCH transmission scheduled by the PSCCH
  • P O_ PSCCH , l represents basic open-loop power (in dBm)of the PSCCH in Mode l
  • ⁇ PSCCH , l represents compensation for path loss of the PSCCH transmit power in Mode l
  • the UE determines the values of P O_PSCCH, l and ⁇ PSCCH , l by the eNB configuration signaling or preconfiguration
  • PL represents path loss of the UE relative to the eNB
  • CBR i represents the CBR range corresponding to congestion level of current transmit resource pool of the UE, wherein the UE determines the value of current CBR by measuring the congestion level or receiving the eNB signaling, the UE determines the CBR range configuration by receiving the
  • the UE determines the adjusted transmit power of the PSSCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH scheduled by the PSCCH, basic open-loop power of the PSSCH in current resource allocation mode of the UE, compensation for path loss of the PSSCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of the PSSCH.
  • the UE determines the adjusted transmit power of the PSSCH according to the following formula:
  • M PSCCH represents the number of PRBs for PSCCH transmission
  • M PSSCH represents the number of PRBs for PSSCH transmission scheduled by the PSCCH
  • P O_ PSSCH l represents basic open-loop power (in dBm) of the PSSCH in Mode l
  • ⁇ PSSCH l represents compensation for path loss of the PSSCH transmit power in Mode l
  • the UE determines the values of P O_PSSCH, l and ⁇ PSSCH , l by the eNB configuration signaling or preconfiguration
  • PL represents path loss of the UE relative to the eNB
  • CBR i represents the CBR range corresponding to congestion level of the UE current transmit resource pool, wherein the UE determines the value of current CBR by measuring the congestion level or receiving the eNB signaling, the UE determines the CBR range configuration by receiving the eNB signaling or preconfiguration,
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 802-803 as follows in embodiment 8, and wherein the operation in step 801 is similar to that in step 601 and not repeated herein.
  • step 802 if the PRBs occupied by the PSCCH are immediately followed the PRBs occupied by the PSSCH, the UE determines a first adjustment parameter and a second adjustment parameter.
  • the first adjustment parameter may be the same as the second adjustment parameter or different from the second adjustment parameter. This is not defined in the embodiment of the present invention.
  • step 803 the UE adjusts the transmit power of the PSCCH according to the first adjustment parameter and adjusts the transmit power of the PSSCH according to the second adjustment parameter, so that the sum of the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH is not greater than the maximum transmit power corresponding to the congestion level of current resource pool and the priority of the data transmission.
  • the adjustment is according to the following formula:
  • ⁇ c2 is the first adjustment parameter
  • ⁇ s2 is the second adjustment parameter
  • 0 ⁇ c2 , ⁇ s2 ⁇ 1 or 0 ⁇ c2 , ⁇ s2 ⁇ 1 is the linear value of the transmit power of the PSCCH before the adjustment
  • 0 ⁇ c2 , ⁇ s2 ⁇ 1 or 0 ⁇ c2 , ⁇ s2 ⁇ 1 is the linear value of the transmit power of the PSCCH before the adjustment
  • P CMAX represents the maximum power (in dBm) for the V2X transmission allowed by the UE in the current subframe, and the UE determines the value of P CMAX by receiving the eNB configuration signaling, preconfiguration, or standard definition; the UE determines the values of ⁇ c2 and ⁇ s2 , so that the determined values satisfy the condition that P PSCCH + P PSSCH is not greater than the linear value of , where represents the maximum transmit power (in dBm), configured by the eNB or preconfigured, for the CBR range CBR i and the priority PPPP j , and ⁇ c2 may be equal to ⁇ s2 .
  • the UE may first determine whether or not the unadjusted transmit power of the PSCCH and the unadjusted transmit power of the PSSCH satisfy the condition ; if the condition is satisfied, the transmit power P PSCCH of the PSCCH and the transmit power P PSSCH of the PSSCH for the UE will not be adjusted, i.e.
  • the UE determines the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH according to the following formula: , where ⁇ c3 and ⁇ s3 may represent the first adjustment parameter and the second adjustment parameter, respectively, 0 ⁇ c3 , ⁇ s3 ⁇ 1 or 0 ⁇ c3 , ⁇ s3 ⁇ 1, the values of ⁇ c3 and ⁇ s3 should be determined by the UE so that P PSCCH + P PSSCH is not greater than the linear value of , and ⁇ c3 may be equal to ⁇ s3 .
  • the UE may adjust only the transmit power of the PSSCH with the transmit power of the PSCCH unadjusted, that is, the first adjustment parameter is 1. Then, the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH are determined according to the following formula:
  • ⁇ 4 may represent the second adjustment parameter, 0 ⁇ 4 ⁇ 1 or 0 ⁇ 4 ⁇ 1, and the value of ⁇ 4 should be determined by the UE so that P PSCCH + P PSSCH is not greater than the linear value of .
  • the UE may first determine whether or not the unadjusted transmit power of the PSCCH and the unadjusted transmit power of the PSSCH satisfy the condition ; if the condition is satisfied, the transmit power of the PSCCH and the transmit power of the PSSCH will not be adjusted, i.e. and ; if the condition is not satisfied, the UE may adjust only the transmit power of the PSSCH, that is, the first adjustment parameter is determined as 1, where ⁇ 5 may represent the second adjustment parameter, 0 ⁇ 5 ⁇ 1 or 0 ⁇ 5 ⁇ 1, and the value of ⁇ 5 should be determined so that P PSCCH + P PSSCH is not greater than the linear value of .
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 902-903 as follows in embodiment 9, and wherein the operation in step 901 is similar to that in step 601 and not repeated herein.
  • step 902 if the PRBs occupied by the PSCCH are not immediately followed by the PRB occupied by the PSSCH, the UE determines the adjusted transmit power of the PSCCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH scheduled by the PSCCH, basic open-loop power of the PSCCH in current resource allocation mode of the UE, compensation for path loss of the PSCCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power in a first CBR range and the data priority field.
  • the first CBR range is the CBR range corresponding to the greater congestion level among the congestion level of the UE current PSCCH transmission resource pool and the congestion level of the UE current PSSCH transmission resource pool, or is the greater CBR range among the CBR range corresponding to the congestion level of the UE current PSCCH transmission resource pool and the CBR range corresponding to the congestion level of the UE current PSSCH transmission resource pool, or is the CBR range corresponding to the congestion level of the UE current PSSCH transmission resource pool, or is the CBR range corresponding to the congestion level of the UE current PSCCH transmission resource pool, or is the CBR range corresponding to the average congestion level of the congestion level of the UE current PSCCH transmission resource pool and the congestion level of the UE current PSSCH transmission resource pool.
  • the UE determines the adjusted transmit power of the PSCCH according to the following formula:
  • M PSCCH represents the number of PRBs for PSCCH transmission
  • M PSSCH represents the number of PRBs for PSSCH transmission scheduled by the PSCCH
  • l 3 if the current UE operates in Mode 3
  • l 4 if the current UE operates in Mode 4
  • the UE determines the values of P O_ PSCCH,l and ⁇ O _ PSCCH,l by the eNB configuration signaling or preconfiguration, wherein P O_ PSCCH,l represents basic open-loop power (in dBm) of the PSCCH in Mode l, and ⁇ O _ PSCCH,l represents compensation for path loss of the PSCCH transmit power in Mode l;
  • PL represents path loss of the UE relative to the eNB;
  • CBR' i represents the CBR range corresponding to the greater congestion level among the congestion level of the UE current PSCCH transmission resource pool and the congestion level of the UE current PSSCH transmission resource pool, or represents the CBR range corresponding to the congestion level of the
  • the UE determines the adjusted transmit power of the PSSCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH scheduled by the PSCCH, basic open-loop power of the PSSCH in current resource allocation mode of the UE, compensation for path loss of the PSSCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power for the priority of the PSSCH in the first CBR range.
  • the UE determines the adjusted transmit power of the PSSCH according to the following formula:
  • P O_ PSSCH,l represents basic open-loop power (in dBm) of the PSSCH in Mode l
  • ⁇ O _ PSSCH,l represents compensation for path loss of the PSSCH transmit power in Mode l
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 1002-1003 as follows in embodiment 10, and wherein the operation in step 1001 is similar to that in step 601 and not repeated herein.
  • the UE determines the adjusted transmit power of the PSCCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH scheduled by the PSCCH, basic open-loop power of the PSCCH in current resource allocation mode of the UE, compensation for path loss of the PSCCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power, for the priority of the PSSCH scheduled by the PSCCH, in a second CBR range, wherein the second CBR range is the CBR range corresponding to the congestion level of the UE current PSCCH transmission resource pool.
  • the UE may determine the adjusted transmit power of the PSCCH according to the following formula:
  • the CBR range corresponding to the congestion level of the UE current PSCCH transmission resource pool, wherein the UE determines the CBR value of the current PSCCH transmission resource pool by measuring the congestion level or receiving the eNB signaling, the UE determines the CBR range configuration by receiving the eNB signaling or preconfiguration, and i ⁇ 0,1,...,15 ⁇ ; represents the maximum transmit power (in dBm), configured by the eNB or preconfigured, for the CBR range and the priority PPPP j .
  • the UE determines the adjusted transmit power of the PSSCH according to the number of the PRBs occupied by the PSCCH, the number of the PRBs occupied by the PSSCH scheduled by the PSCCH, basic open-loop power of the PSSCH in current resource allocation mode of the UE, compensation for path loss of the PSSCH transmit power in current resource allocation mode of the UE, path loss of the UE relative to the eNB, and the maximum transmit power for the priority of the PSSCH in a third CBR range, wherein the third CBR range is the CBR range corresponding to the congestion level of the UE current PSSCH transmission resource pool.
  • the UE may determine the adjusted transmit power of the PSSCH according to the following formula:
  • the CBR range corresponding to the congestion level of the UE current PSSCH transmission resource pool wherein the UE determines the CBR value of the current PSSCH transmission resource pool by measuring the congestion level or receiving the eNB signaling, the UE determines the CBR range configuration by receiving the eNB signaling or preconfiguration, and i ⁇ 0,1,...,15 ⁇ ; represents the maximum transmit power (in dBm), configured by the eNB or preconfigured, for the CBR range and the priority PPPP j .
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 1102-1103 as follows in embodiment 11, and wherein the operation in step 1101 is similar to that in step 601 and not repeated herein.
  • step 1102 if the PRBs occupied by the PSCCH are not immediately followed by the PRB occupied by the PSSCH, the UE determines a third adjustment parameter and a fourth adjustment parameter.
  • the third adjustment parameter may be the same as the fourth adjustment parameter or different from the fourth adjustment parameter. This is not defined herein.
  • step 1103 the UE adjusts the transmit power of the PSCCH according to the third adjustment parameter and adjusts the transmit power of the PSSCH according to the fourth adjustment parameter, so that the sum of the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH is not greater than the maximum transmit power for the priority of the PSSCH in the first CBR range.
  • the UE may adjust the transmit power of the PSCCH and the transmit power of the PSSCH according to the following formula:
  • ⁇ ' c3 and ⁇ ' s3 may represent the third adjustment parameter and the fourth adjustment parameter, respectively, 0 ⁇ ' c3 , ⁇ ' s3 ⁇ 1 or 0 ⁇ ' c3 , ⁇ ' s3 ⁇ 1
  • P CMAX represents the maximum power (in dBm) for the V2X transmission allowed by the UE in the current subframe, and the UE determines the value of P CMAX by receiving the eNB configuration signaling, preconfiguration, or standard definition.
  • the values of ⁇ ' c3 and ⁇ ' s3 should be determined by the UE so that P PSCCH + P PSSCH is not greater than the linear value of , and ⁇ ' c3 may be equal to ⁇ ' s3 .
  • the UE may first determine whether or not the unadjusted transmit power of the PSCCH and the unadjusted transmit power of the PSSCH satisfy ; if the condition is satisfied, the transmit power of the PSCCH and the transmit power of the PSSCH will not be adjusted, i.e. and ; if the condition is not satisfied, the UE determines the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH according to the following formula: and , where 0 ⁇ ' c4 , ⁇ ' s4 ⁇ 1 or 0 ⁇ ' c4 , ⁇ ' s4 ⁇ 1.
  • ⁇ ' c4 and ⁇ ' s4 are determined by the UE so that P PSCCH + P PSSCH is not greater than the linear value of , and ⁇ ' c4 may be equal to ⁇ ' s4 .
  • the UE may adjust only the transmit power of the PSSCH, that is, the third adjustment parameter is 1. Then, the adjusted transmit power of the PSCCH and the adjusted transmit power of the PSSCH are determined according to the following formula:
  • ⁇ ' 5 may represent the fourth adjustment parameter, 0 ⁇ ' 5 ⁇ 1 or 0 ⁇ ' 5 ⁇ 1, and ⁇ ' 5 should be determined so that P PSCCH + P PSSCH is not greater than the linear value of .
  • the UE may first determine whether or not the unadjusted transmit power of the PSCCH and the unadjusted transmit power of the PSSCH satisfy ; if the condition is satisfied, the transmit power of the PSCCH and the transmit power of the PSSCH will not be adjusted, i.e. and ; if the condition is not satisfied, the UE may adjust only the transmit power of the PSSCH with the transmit power of the PSCCH unadjusted, i.e. and , where 0 ⁇ ' 6 ⁇ 1 or 0 ⁇ ' 6 ⁇ 1, and the value of ⁇ ' 6 should be determined by the UE so that P PSCCH + P PSSCH is not greater than the linear value of .
  • step 602 of the UE adjusting the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter comprises steps 1202-1203 as follows in embodiment 12, and wherein the operation in step 1201 is similar to that in step 601 and not repeated herein.
  • step 1202 if the PRBs occupied by the PSCCH are not immediately followed by the PRB occupied by the PSSCH, the UE determines a fifth adjustment parameter corresponding to the PSCCH and a sixth adjustment parameter corresponding to the PSSCH.
  • step 1203 the UE adjusts the transmit power of the PSCCH by the fifth adjustment parameter so that the adjusted transmit power of the PSCCH is not greater than a first preset value, and adjusts the transmit power of the PSSCH by the sixth adjustment parameter so that the adjusted transmit power of the PSSCH is not greater than a second preset value.
  • the UE adjusts the transmit power of the PSCCH according to the fifth adjustment parameter and adjusts the transmit power of the PSSCH according to the sixth adjustment parameter, i.e. and , where is the linear value of the transmit power of the PSCCH before the adjustment, and is the linear value of the transmit power of the PSSCH before the adjustment, wherein
  • P CMAX represents the maximum power (in dBm) for the V2X transmission allowed by the UE in the current subframe
  • the UE determines the value of P CMAX by receiving the eNB configuration signaling, preconfiguration, or standard definition.
  • the fifth adjustment parameter ⁇ ' c7 and the sixth adjustment parameter ⁇ ' s7 satisfy the following relationship: 0 ⁇ ' c7 , ⁇ ' s7 ⁇ 1 or 0 ⁇ ' c7 , ⁇ ' s7 ⁇ 1,the fifth adjustment parameter ⁇ ' c7 should be determined by the UE so that P PSCCH is not greater than the linear value of , and the sixth adjustment parameter ⁇ ' s7 should be determined by the UE so that P PSSCH is not greater than the linear value of , where represents the maximum transmit power (in dBm), configured by the eNB or preconfigured, for the CBR range and the priority PPPP j , and represents the maximum transmit power (in dBm), configured by the eNB or preconfigured, for the CBR range and the priority PPPP j .
  • the UE may predetermine whether or not the transmit power of the current transmit PSCCH and the transmit power of the transmit PSSCH satisfy
  • the transmit power of the PSCCH and the transmit power of the PSSCH will not be adjusted, i.e. and ; if the condition is not satisfied, it is necessary to adjust the transmit power of the PSCCH by an adjustment parameter ⁇ ' c8 and adjust the transmit power of the PSSCH by an adjustment parameter ⁇ ' s8 , where 0 ⁇ ' c8 , ⁇ ' s8 ⁇ 1 or 0 ⁇ ' c8 , ⁇ ' s8 ⁇ 1, the value of ⁇ ' c8 should be determined by the UE so that P PSCCH is not greater than the linear value of , and the value of ⁇ ' s8 should be determined by the UE so that P PSSCH is not greater than the linear value of .
  • the embodiment of the present invention provides a further method of V2X communications, as shown in Fig. 3.
  • a first UE determines, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting a Side Link Synchronization Signal (SLSS)and a Physical Sidelink Broadcast CHannel (PSBCH), wherein the configuration signaling or preconfiguration signaling includes at least one of a first sync offset indication value syncOffsetIndicator-v1, a second sync offset indication value syncOffsetIndicator-v2, and a third sync offset indication value syncOffsetIndicator-v3.
  • SLSS Side Link Synchronization Signal
  • PSBCH Physical Sidelink Broadcast CHannel
  • the first UE may determine, according to the eNB configuration, one or more optional time-frequency resource positions for transmitting the SLSS and the PSBCH; if the first UE is out of the coverage of the cellular network, the first UE may determine, according to the preconfiguration, one or more optional time-frequency resource positions for transmitting the SLSS and the PSBCH.
  • the first UE can correspondingly determine whether the reference synchronization source is GNSS, eNB, or UE; if the reference synchronization source is a UE, the first UE may determine the type of the reference synchronization source based on the SLSS ID transmitted by the reference synchronization source, the PSBCH content transmitted by the reference synchronization source, and the position where the UE reference synchronization source transmits the SLSS and the PSBCH.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • LTE Long Term Evolution
  • the first UE determines, according to the type of the reference synchronization source, time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted .
  • a UE within the cellular network coverage may be represented by ICUE, and a UE out of the cellular network coverage may be represented by OOCUE.
  • the ICUE obtains corresponding information about transmission of the SLSS according to the configuration signaling of the eNB, and transmits the corresponding information of the SLSS with the eNB or GNSS as the reference synchronization source; if OOCUE, the OOCUE obtains corresponding information about transmission of the SLSS according to preconfiguration, and the first UE may transmit the SLSS and the PSBCH with other UEs transmitting the SLSS or GNSS as the reference synchronization source.
  • the embodiment of the present invention provides a further method of V2X communications.
  • the embodiment of the present invention determines, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting the SLSS and the PSBCH and the type of the reference synchronization source, and can determine, according to the type of the reference synchronization source, specific time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted.
  • the specific time position information for the SLSS and the PSBCH to be transmitted, the identity information of the SLSS to be transmitted and the value of the inCoverage field in the PSBCH to be transmitted can be determined according to the cellular network state information and the type of the reference synchronization source, thereby avoiding interference between a UE, which is within the cellular network cell coverage and capable of accurately receiving a GNSS signal, and a UE, which is out of the cellular network cell and capable of accurately receiving a GNSS synchronization signal, or UEs using the two UEs as reference synchronization sources, so that the PSBCH could be successfully detected.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted comprises step 1402 as follows in embodiment 14, and wherein the operation in step 1401 is similar to that in step 1301 and not repeated herein.
  • step 1402 if the first UE is within the cellular network coverage and the type of the reference synchronization source is GNSS, the UE determines, based on syncOffsetIndicator-v1 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the identity (ID) of the SLSS to be transmitted as 0, and the value of the inCoverage field in the PSBCH to be transmitted as TRUE, wherein the current system frame number is determined by the first UE according to the received time information of GNSS.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted comprises step 1502 as follows in embodiment 15, and wherein the operation in step 1501 is similar to that in step 1301 and not repeated herein.
  • step 1502 if the first UE is not within the cellular network coverage, uses GNSS as the reference synchronization source and cannot receive the PSBCH information transmitted by the second UE, the first UE determines, based on syncOffsetIndicator-v3 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the ID of the SLSS to be transmitted as 1, and the value of the inCoverage field in the PSBCH to be transmitted as TRUE, wherein the second UE is within the cellular network coverage and uses GNSS as the reference synchronization source.
  • the SLSS ID used by the UE should be 0 and the inCoverage field is set as FALSE; or the SLSS ID used by the UE should belong to ⁇ 1,167 ⁇ , e.g., 1, and the inCoverage field is set as TRUE.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted, from the at least one optional time position information for transmitting the SLSS and the PSBCH comprises step 1602 as follows in embodiment 16, and wherein the operation in step 1601 is similar to that in step 1301 and not repeated herein.
  • step 1602 if the first UE is not within the cellular network coverage, uses GNSS as the reference synchronization source and can receive the PSBCH information transmitted by the second UE, the first UE determines, based on syncOffsetIndicator-v2 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the ID of the SLSS to be transmitted as 0 or 1, and the value of the inCoverage field in the PSBCH to be transmitted as FALSE.
  • a UE that is not within the cellular network coverage and uses GNSS as the reference synchronization source may be represented by OOCUE1.
  • the first UE determines the value of syncOffsetIndicator-v2 by preconfiguration, preferably, 0 ⁇ syncOffsetIndicator-v2 ⁇ 160, syncOffsetIndicator-v2 is not equal to syncOffsetIndicator-v1 and syncOffsetIndicator-v3, and at this point the SLSS ID used by the first UE should be 0 or 1 and the inCoverage field is set as FALSE.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted, from the at least one optional time position information for transmitting the SLSS and the PSBCH comprises step 1702 as follows in embodiment 17, and wherein the operation in step 1701 is similar to that in step 1301 and not repeated herein.
  • step 1702 if the first UE is not within the cellular network coverage and uses the second UE as the reference synchronization source, the first UE determines, based on syncOffsetIndicator-v2 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the ID of the SLSS to be transmitted as 0, and the value of the inCoverage field in the PSBCH to be transmitted as FALSE.
  • OOCUE2 a UE that is out of the cellular network coverage and uses an ICUE, with GNSS as the synchronization source, as the synchronization source.
  • the first UE determines the value of syncOffsetIndicator-v2 by preconfiguration, preferably, 0 ⁇ syncOffsetIndicator-v2 ⁇ 160, syncOffsetIndicator-v2 is not equal to syncOffsetIndicator-v1 and syncOffsetIndicator-v3.
  • G-SFN represents the current system frame number determined by the UE according to the GNSS timing, and at this point the SLSS ID used by the first UE should be 0 and the inCoverage field is set as FALSE.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted, from the at least one optional time position information for transmitting the SLSS and the PSBCH comprises step 1802 as follows in embodiment 18, and wherein the operation in step 1801 is similar to that in step 1301 and not repeated herein.
  • step 1802 if the first UE is not within the cellular network coverage and uses the third UE as the reference synchronization source, the first UE determines, based on syncOffsetIndicator-v2 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the ID of the SLSS to be transmitted as the ID of the SLSS transmitted by the third UE plus 168, or as any integer among [1,167], or as any integer among [169,503],and the value of the inCoverage field in the PSBCH to be transmitted as FALSE, wherein the third UE is not within the cellular network coverage and uses GNSS as the reference synchronization source.
  • step 1302 in which, based on the coverage state about whether the first UE is within the cellular network coverage, the first UE determines, according to the type of the reference synchronization source, time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted, from the at least one optional time position information for transmitting the SLSS and the PSBCH comprises step 1902 as follows in embodiment 19, and wherein the operation in step 1901 is similar to that in step 1301 and not repeated herein.
  • step 1902 if the first UE is not within the cellular network coverage and uses the fourth UE as the reference synchronization source, the first UE determines, based on syncOffsetIndicator-v1 and current system frame number, time position information for transmitting the SLSS information and the PSBCH information, the ID of the SLSS to be transmitted as 168, and the value of the inCoverage field in the PSBCH to be transmitted as FALSE, wherein the fourth UE is not within the cellular network coverage and uses the second UE as the reference synchronization source.
  • the IDs of the SLSS transmitted on the same transmission resource differ from each other. Since the different SLSS IDs correspond to orthogonal SLSS sequence and PSBCH demodulation reference signal sequence, it is possible to avoid interference between an ICUE with GNSS as the synchronization source and an OOCUE with GNSS as the synchronization source, and further avoid interference between a UE withaUE1 as the synchronization source and a UE with an OOCUE2 as the synchronization source.
  • the inCoveragefield is set in a mode so as to ensure that the present scheme is consistent with the rules defined in the existing standards, reducing complexity of standardization and implementation.
  • the present invention provides a device for V2X communications, as shown in Fig. 4, the device comprising:
  • a first receiving module 2001 for receiving the configuration signaling transmitted by the eNB, wherein the configuration signaling comprises at least one of an index n c corresponding to the carrier C configured with Mode 3 resource pool, a carrier SC for transmission of downlink control information S-DCI_C used for scheduling sidelink transmission on the carrier C, and maximum index value n CI_m corresponding to the carrier C;
  • a first determining module 2002 for determining, according to the configuration signaling, at least one of a search space corresponding to the S-DCI_C, the transmission carrier of the S-DCI_C, and the number of bits corresponding to the S-DCI_C;
  • the embodiment of the present invention provides a device for V2X communications.
  • the embodiment of the present invention can determine, by receiving the configuration signaling transmitted by the eNB, at least one of a search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C and the number of bits corresponding to S-DCI_C according to the configuration signaling, and can detect S-DCI_C according to at least one of the search space corresponding to S-DCI_C, the transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C.
  • the search space of S-DCI_C can be determined, or it can be ensured that the number of bits of S-DCI_C is equal to the number of bits of any other DCI mapped to the search space, so that S-DCI_C can be detected from the corresponding search space and then the number of times of blind detection in the UE downlink control channel can be reduced.
  • the device for V2X communications provided by the embodiment of the present invention can implement the above-described method embodiments, and the description in the method embodiments may be referred to for specific function implementation which is not repeated herein.
  • the embodiment of the present invention provides another device for V2X communications, as shown in Fig. 5, the device comprising:
  • a second determining module 2101 for determining power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, wherein the power control parameter comprises at least one of open-loop power control parameter, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of data transmission;
  • an adjusting module 2102 for adjusting the transmit power of a Physical Sidelink Control CHannel (PSCCH) and the transmit power of a Physical Sidelink Shared CHannel (PSSCH) according to the power control parameter.
  • PSCCH Physical Sidelink Control CHannel
  • PSSCH Physical Sidelink Shared CHannel
  • the embodiment of the present invention provides another device for V2X communications.
  • the embodiment of the present invention determines power control parameter according to configuration signaling transmitted by the eNB or preconfiguration signaling, and adjusts the transmit power of the PSCCH and the transmit power of the PSSCH according to the power control parameter, wherein the power control parameter comprises at least one of open-loop power control parameter, and the maximum transmit power corresponding to the congestion level of current resource pool and the priority of data to be transmitted. That is, the above embodiment can adjust the transmit power according to current congestion level and open-loop power. That is, the control parameter for adjusting the transmit power can simultaneously satisfy the current congestion level and the uplink control, so that it can be ensured that the adjusted transmit power simultaneously satisfies the congestion control and uplink interference control requirements.
  • the device for V2X communications provided by the embodiment of the present invention can implement the above-described method embodiments, and the description in the method embodiments may be made reference for specific function implementation which is not repeated herein.
  • the present invention provides a further device for V2X communications, as shown in Fig. 6, the device comprising:
  • a third determining module 2201 for determining, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting a Side Link Synchronization Signal (SLSS) and a Physical Sidelink Broadcast CHannel (PSBCH),
  • SLSS Side Link Synchronization Signal
  • PSBCH Physical Sidelink Broadcast CHannel
  • the third determining module 2201 further determines, according to the type of a reference synchronization source, time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted.
  • the embodiment of the present invention provides a further device for V2X communications.
  • the embodiment of the present invention determines, by the eNB configuration signaling or preconfiguration signaling, at least one optional time position information for transmitting the SLSS and the PSBCH and the type of the reference synchronization source, and can determine, according to the type of the reference synchronization source, specific time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, the identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted.
  • the specific time position information for the SLSS and the PSBCH to be transmitted, the identity information of the SLSS to be transmitted and the value of the inCoverage field in the PSBCH to be transmitted can be determined according to the cellular network state information and the type of the reference synchronization source, thereby avoiding interference between a UE, which is within the cellular network cell coverage and capable of accurately receiving a GNSS signal, and a UE, which is out of the cellular network cell and capable of accurately receiving a GNSS synchronization signal, or there is no interference between the UEs using the above two UEs as reference synchronization sources, so that the PSBCH could be successfully detected.
  • the device for V2X communications provided by the embodiment of the present invention can implement the above-described method embodiments, and the description in the method embodiments may be made reference for specific function implementation which is not repeated herein.
  • a higher modulation scheme 64QAM
  • 64QAM 64QAM
  • the first-type V2X UE can take resources possibly occupied by the second-type V2X UE into consideration when selecting a transmission resource.
  • One resource includes one or more successive subchannels, and one subchannel includes N successive Physical Resource Blocks (PRBs), where N is configured by a higher-layer signaling or preconfigured.
  • PRBs Physical Resource Blocks
  • Step 1 A first-type V2X UE determines the time-frequency resource location and priority of the scheduled PSSCH by receiving a PSCCH transmitted by other UEs.
  • the other UEs can be UEs of the same type or UEs of different types.
  • Step 2 The first-type V2X UE detects reference signal received power (referred to as Reference Signal Received Power of the PSSCH (PSSCH-RSRP) measurement) of the scheduled PSSCH, and excludes resources having PSSCH-RSRP greater than a specific threshold. For example, if the proportion of the remaining resources in the total resources within a resource selection window is less than 20%, the specific threshold is increased by 3 dB, and this step will be executed again until the proportion of the remaining resources is not less than 20%.
  • PSSCH-RSRP Reference Signal Received Power of the PSSCH
  • Step 3 The first-type V2X UE calculates a Sidelink-Received Signal Strength Indicator (S-RSSI) of the remaining resources, and randomly selects a resource as the transmission resource from part of resources having the lowest S-RSSI. For example, in an ascending order, resources are successively selected from the remaining resources until the proportion of all the selected resources in the total resources within the resource selection window is not less than 20%. Subsequently, a resource is randomly selected from the selected resources to serve as the transmission resource.
  • S-RSSI Sidelink-Received Signal Strength Indicator
  • the first-type V2X UE supports only the QPSK and 16QAM modulation.
  • the first-type V2X UE when the first-type V2X UE receives a PSCCH from the second-type V2X UE (the bit information contained in PSCCH of the LTE Rel-14 is shown in Table 1), it reads an MCS bit field in the PSCCH and finds that the indicated modulation scheme is 64QAM, that is, when I MCS >20 in Table 2, behaviors of the UE are not defined in the prior art.
  • the first-type V2X UE can perform analysis by the following several implementations.
  • the first-type V2X UE selects a transmission resource and if I MCS indicated in the PSCCH from the other UEs is greater than 20, the first-type V2X UE executes the steps 1 to 3 according to the information of the PSCCH, but the first-type V2X UE may not try to decode the PSSCH scheduled by the PSCCH.
  • the “not try to decode” in the present invention means “may skip decoding”, that is, the first-type V2X UE may decode the PSSCH scheduled by the PSCCH or skip decoding the PSSCH scheduled by the PSCCH, similarly hereinafter.
  • the first-type V2X UE executes the steps 1 to 3 according to the information of the PSCCH, and the first-type V2X UE tries to decode the PSSCH scheduled by the PSCCH.
  • the TBS index I TBS is determined according to I MCS in Table 2
  • the TBS is determined according to Table 7.1.7.2.1-1 or 7.1.7.2.2-1 in 3GPP TS 36.213 and then added with a Cyclic Redundancy Check (CRC) to serve as a numerator for the calculation of the effective channel coding rate
  • CRC Cyclic Redundancy Check
  • the number of physical channel bits of the PSSCH is used as a denominator for the calculation of the effective channel coding rate.
  • the number of physical channel bits of the PSSCH is calculated as follows: the number of allocated Resource Blocks (RBs)*the number of subcarriers of each RB*the number of available symbols (eight symbols)*the modulation order Q'.
  • Way 3 As another implementation of the way 2, when 20 ⁇ I MCS ⁇ 29, this method is performed described in accordance to the way 2.
  • the first-type V2X UE can neither decode the PSSCH nor measure the PSSCH-RSRP.
  • Thc the predefined threshold
  • the first-type V2X UE executes the steps 1 to 3 according to the information of the PSCCH, and the first-type V2X UE tries to decode the PSSCH scheduled by the PSCCH.
  • the first-type V2X UE decides that the TBS exceeds the maximum UE capability (e.g., 31704) according to the received MCS information of the PSCCH, the first-type V2X UE executes the steps 1 to 3 according to the information of the PSCCH, but does not try to decode the PSSCH scheduled by the PSCCH.
  • the maximum UE capability e.g., 31704
  • the first-type V2X UE selects a transmission resource and if the value of the bit field indication “resource reservation” in the PSCCH from other UEs is greater than or equal to Thr_int, the first-type V2X UE executes the steps 1 to 3 according to the information of the PSCCH, but does not try to decode the PSSCH scheduled by the PSCCH.
  • the first-type V2X UE measures PSSCH-RSRP based on the PSSCH scheduled by the PSCCH, but the result of measurement is not applied to subframes of other subsequently possibly transmitted PSSCHs.
  • a UE can reserve, by the bit field indication “resource reservation”, resources of multiple subframes for subsequently possibly transmitted PSSCHs. That is, the UE indicates, by the current PSCCH, one or two PSSCH transmissions scheduled by the PSCCH, and can inform, by the PSCCH, other UEs of subsequent subframes in which this transmitting UE may transmit other PSSCHs.
  • the UE measures the PSSCH-RSRP of the PSSCH indicated by the PSCCH and the S-RSSI, and it is assumed that the RSRP/RSSI is the same in these reserved subframes.
  • the first-type V2X UE when the value of the bit field indication “resource reservation” is greater than or equal to Thr_int, the first-type V2X UE is unable to determine the location of the reserved subframes. Nevertheless, the first-type V2X UE can still measure the PSSCH-RSRP of the PSSCH indicated by the PSCCH and the S-RSSI, and will take the interference possibly caused by the PSSCH into consideration during the resource selection.
  • Thr_int 13.
  • Fig. 1 shows a flowchart of a preferred method for receiving a PSCCH in V2X communication in this embodiment, comprising the following steps 2301 to 2303.
  • Step 2301 A UE detects a PSCCH in format of SCI X transmitted by other UEs.
  • Step 2302 The UE determines, according to modulation and coding indication information (i.e., an MCS bit field) of the SCI X, a modulation order of a PSSCH scheduled by the SCI X, and the UE determines, according to the SCI X, whether to measure PSSCH-RSRP of the PSSCH scheduled by the SCI X and/or an S-RSSI and selects a transmission resource according to the measured information.
  • modulation and coding indication information i.e., an MCS bit field
  • a first-type V2X UE executes by one of the above ways 1 to 5.
  • a second-type V2X UE determines whether to measure the PSSCH-RSRP of the PSSCH scheduled by the SCI X and/or the S-RSSI by one of the following ways 6 to 7.
  • Thc can be defined as the effective channel coding rate of single transmission or can be defined as the effective channel coding rate determined according to the number of transmissions indicated by the received PSSCH
  • Thc the predefined threshold
  • the transmission resource can be selected according to the measured information by one of the following ways.
  • the UE performing transmission resource selection also needs to determine a threshold for the PSSCH-RSRP from other UEs according to the modulation scheme to be used by the UE performing transmission resource selection.
  • the threshold for the PSSCH-RSRP is related to the priority of a V2X service.
  • the modulation scheme is added on the basis of the existing factors influencing the threshold.
  • the threshold for the PSSCH-RSRP is Thr_rsrp1 when the UE performing transmission resource selection uses the QPSK or 16QAM modulation scheme
  • the threshold for the PSSCH-RSRP is Thr_rsrp2 when the UE performing transmission resource selection uses the 64QAM modulation scheme.
  • the Thr_rsrp2 is less than or equal to the Thr_rsrp1, so that the data transmission based on 64QAM can be further guaranteed.
  • the Thr_rsrp2 can be configured by a higher-layer signaling or can be a value of Thr_rsrp1 defined by the standard.
  • the Thr_rsrp2 has an offset ⁇ 1 relative to Thr_rsrp1.
  • Thr_rsrp2 Thr_rsrp1 (dB) + ⁇ 1.
  • ⁇ 1 is equal to -3(dB).
  • ⁇ 1 can be configured by a higher-layer signaling, preconfigured or predefined.
  • the proportion of the remaining resources in the total resources within the resource selection window shall not be less than a specific threshold Thr_ step2 _ratio .
  • the specific threshold needs to be determined according to the modulation scheme to be used by the UE performing transmission resource selection.
  • the proportion of said part of resources in the total resources within the resource selection window shall not be less than a specific threshold Thr_ step3_ratio .
  • the specific threshold needs to be determined according to the modulation scheme to be used by the UE performing transmission resource selection.
  • the specific threshold Thr_ step2 _ratio in the step 2 is equal to Thr_ step2 _ ratio1 and the specific threshold Thr_ step3 _ratio in the step 3 is equal to Thr_ step3 _ ratio1 .
  • the specific threshold Thr_ step2 _ratio in the step 2 is equal to Thr_ step2 _ ratio2
  • the specific Thr_ step3 _ratio in the step 3 is equal to Thr_ step3 _ ratio2 .
  • the Thr_ step2 _ ratio2 is less than Thr_ step2 _ ratio1
  • the Thr_ step3 _ ratio2 is less than the Thr_ step3 _ ratio1 , so that the interference level of resource candidates can be further reduced.
  • the way 1 and way2 can be combined.
  • the PSSCH-RSRP threshold Thr_rsrp and the Thr_ step2 _ratio in the step 2 and the Thr_ step3 _ratio in the step 3 are all less than the thresholds when the UE uses the QPSK or 16QAM modulation scheme.
  • Way 3 In the step 2, the UE performing transmission resource selection needs to determine, according to the modulation scheme indicated by the PSCCH received from other UEs, a threshold for the PSSCH-RSRP from the other UEs.
  • the threshold for the PSSCH-RSRP is Thr_rsrp1 when the UE performing transmission resource selection uses the QPSK or 16QAM modulation scheme
  • the threshold for the PSSCH-RSRP is Thr_rsrp3 when the other UEs use the 64QAM modulation scheme.
  • the Thr_rsrp3 is less than or equal to the Thr_rsrp1, so that the data transmission based on 64QAM can be further guaranteed.
  • the Thr_rsrp3 can be configured by a higher-layer signaling or can be a value of Thr_rsrp1 defined by the standard.
  • the Thr_rsrp3 has an offset ⁇ 2 relative to Thr_rsrp1.
  • Thr_rsrp3 Thr_rsrp1 (dB) + ⁇ 2.
  • ⁇ 2 is equal to -3(dB).
  • ⁇ 2 can be configured by a higher-layer signaling, preconfigured or predefined.
  • the way 1 and way 3 can be combined.
  • the UE performing transmission resource selection needs to determine, according to the adjustment scheme to be used by the UE performing transmission resource selection and the modulation scheme indicated by the PSCCH received from other UEs, a threshold for the PSSCH-RSRP from the other UEs.
  • the threshold for the PSSCH-RSRP is Thr_rsrp1 when the UE performing transmission resource selection uses the QPSK or 16QAM modulation scheme; and, in four cases corresponding to whether the UE performing transmission resource selection uses 64QAM and whether the modulation scheme indicated by the received PSCCH from the other UEs is 64QAM, the value of the threshold Thr_rsrp4 for the PSSCH-RSRP can be identical or different. Wherein, the Thr_rsrp4 is less than or equal to the Thr_rsrp1, so that the data transmission based on 64QAM can be further guaranteed.
  • the Thr_rsrp4 can be configured by a higher-layer signaling or can be a value of Thr_rsrp1 defined by the standard.
  • the Thr_rsrp4 has an offset ⁇ 3 relative to Thr_rsrp1.
  • Thr_rsrp4 Thr_rsrp1 (dB) + ⁇ 3.
  • ⁇ 3 is equal to -3(dB).
  • ⁇ 3 can be configured by a higher-layer signaling, preconfigured or predefined.
  • the ways 1, 2 and 3 can be combined.
  • the thresholds are determined according to the modulation scheme, so that it is advantageous to reduce the interference during the transmission of PSSCHs using 64QAM.
  • the second-type V2X UE determines the modulation order by one of the following ways.
  • the MCS-TBS table is as shown in Table 2.
  • the first-type V2X UE or the second-type V2X UE can decode the PSSCH.
  • a higher modulation scheme e.g. 64QAM
  • the second-type V2X UE reads MCS indication information in the PSCCH from the other UEs.
  • an MCS table can be indicated by one of the reserved bits, that is, the MCS table for the first-type V2X UE (table 2) or the new MCS table as shown above for the second-type V2X UE is used.
  • Step 2303 The UE determines, according to the modulation and coding indication information of the SCI X, whether to further decode the PSSCH scheduled by the SCI X.
  • the UE may not be unable to correctly decode the data packet, so that the UE cannot decode this data packet.
  • the MCS table (Table 2) in the LTE Rel-8 and the TBS table (Table 7.1.7.2.1-1 in 3GPP TS 36.213) are reused, it is likely that the effective coding rate of part of I MCS exceeds 0.93. In order to prevent the effective coding rate from exceeding 0.93, only the remaining I MCS can be used, so that the flexibility of supportable TBSs is decreased. Particularly after supporting 64QAM, for example, in Table 2, all I MCS greater than 23 cannot be used. Similarly, in the V2X communication in LTE Rel-14/15 or NR, one V2X transmission can occupy less time resources. For example, only one time slot (i.e., 7 symbols) can be occupied.
  • the TBS can be determined by one of the following ways.
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213, wherein, .
  • the used ⁇ can be different.
  • the used ⁇ is equal to 0.75; and, when the length of the time resource occupied by the transmitted PSSCH is 0.5 ms, the used ⁇ is equal to 0.375.
  • the used ⁇ is equal to 1, that is, the number of PRBs occupied by the PSSCH scheduled by the PSCCH is N' PRB , and the TBS is determined according to N' PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213; and, when the length of the time resource occupied by the transmitted PSSCH is 0.5 ms, the used ⁇ is equal to 0.5, wherein, .
  • the prior art is as follows: according to the 40 PRBs and by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213, the TBS is determined as 22920, and the effective coding rate is greater than 0.93. However, in the way 1 in this embodiment, is determined first, and the TBS is then determined as 18336 according to the 32 PRBs by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213. In this case, the effective coding rate is less than 0.93.
  • Way 2 for determining TBS When I MCS > Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213, wherein, ; and, when I MCS ⁇ Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N' PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213.
  • the Th_mcs1 is defined independently or configured independently.
  • the Th_mcs1 is predefined by the standard.
  • the Th_mcs1 in this embodiment is equal to the Th_mcs in Embodiment 1.
  • the Th_mcs1 in this embodiment and the Th_mcs in Embodiment 1 are defined independently.
  • the Th_mcs1 predefined by the standard is equal to 18.
  • the effective coding rate of the TBS corresponding to the weighted N' PRB is less than or equal to 0.93.
  • the Th_mcs1 is determined with respect to the number of PRBs possibly occupied by the PSSCH, so that, after all I MCS corresponding to 64QAM and I MCS in 16QAM possibly resulting in an effective coding rate greater than 0.93 are weighted by N' PRB , the effective coding rate of the corresponding TBS is less than or equal to 0.93.
  • the Th_mcs1 predefined by the standard is set according to the maximum number of transmissions of the PSSCH, for example, the minimum MCS index corresponding to the effective coding rate greater than 0.93 after two PSSCH transmissions are combined.
  • this implementation is the same as the calculation method in the Rel-14 V2X UE.
  • the Th_mcs1 23.
  • the way for determining TBS is the same as that in the Rel-14 V2X, that is, the TBS is determined by the N' PRB indicated by the PSCCH, so that the first-type V2X UE can decode the PSSCH scheduled by the PSCCH transmitted by the second-type V2X UE; and, when I MCS ⁇ Th_mcs1, the TBS is determined after weighting the N' PRB indicated by the PSCCH.
  • the first-type V2X UE is unable to decode the PSSCH.
  • the TBS can be determined after weighting the N' PRB , so that the second-type V2X UE can correctly decode the PSSCH.
  • the used ⁇ may be different.
  • the value of Th_mcs1 is not predefined by the standard, but it is determined that the value of Th_mcs1 is predefined by the standard.
  • the value of Th_mcs1 is determined according to the maximum number of transmissions of the PSSCH, for example, determined by the minimum MCS index corresponding to the effective coding rate greater than 0.93 after two PSSCH transmissions are combined.
  • the value of Th_mcs1 may be different.
  • the value of Th_mcs1 may be different.
  • V2X UE can identify whether the received PSCCH is from the first-type V2X UE or the second-type V2X UE:
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH; and the TBS is determined according to N' PRB by looking up the Table 7.1.7.2.1-1 in TS 36.213.
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213, wherein, .
  • the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213, wherein, ; and, when I MCS ⁇ Th_mcs1, the number N' PRB of PRBs occupied by the PSSCH scheduled by the PSCCH is determined according to the information “frequency-domain resource location for initial transmission and retransmission” indicated in the received PSCCH, and the TBS is determined according to N' PRB by looking up the Table 7.1.7.2.1-1 in 3GPP TS 36.213.
  • This embodiment can be implemented by steps 2401 to 2403.
  • Step 2401 A UE detects a PSCCH in format of SCI X transmitted by other UEs.
  • Step 2402 The UE determines a TBS according to indication information “MCS” (an MCS bit field) and information “frequency-domain resource location for initial transmission and retransmission” of the SCI X.
  • MCS an MCS bit field
  • the TBS is determined according to one of the ways 1 to 3 in this embodiment.
  • Step 2403 The UE decodes the PSSCH according to the information of the SCI X.
  • Embodiment 22 is a diagrammatic representation of Embodiment 22.
  • the required transmitting power is different in order to realize the same correct reception probability. For example, when the modulation order is higher, to realize the same coverage range, the required transmitting power is relatively high. Meanwhile, the required transmitting power for realizing the same correct reception probability is also related to the number of transmissions. For example, if at least 3dB of gain is achieved by combining two transmissions when compared to one transmission, to realize the same coverage range, the transmitting power required by two transmissions is not greater than half of the transmitting power required by one transmission.
  • the Power Spectrum Density (PSD) of a PSSCH in format of SCI X and the PSD of a PSSCH scheduled by the PSCCH should be determined according to the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH.
  • the power of the PSSCH can be determined first, and the power of the PSCCH is then determined according to a PSD offset relative to the PSSCH.
  • the PSD offset is determined according to the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH.
  • the PSD offset can be determined by one of the following ways 1 to 3.
  • Way 1 The PSD offset between the PSSCH and the PSCCH is not related to the relationship between the modulation scheme of the PSSCH and the modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase in the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH.
  • the total power A of the PSSCH and the PSCCH is:
  • f(Q' m ) is a function using Q' m as a variable and increases with the increase of Q' m .
  • M PSSCH is the number of RBs occupied by the PSSCH
  • M PSCCH is the number of RBs occupied by the PSCCH
  • P O_ PSSCH,3 and ⁇ PSSCH,3 are parameters configured by the higher layer
  • PL is the path loss
  • P CMAX is the maximum transmitting power.
  • the power of the PSCCH and the power of the PSSCH are as follows:
  • the PSD offset between the PSSCH and the PSCCH is related to the relationship between the modulation scheme of the PSSCH and the modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase in the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH.
  • the total power A of the PSSCH and the PSCCH is calculated by:
  • M PSSCH is the number of RBs occupied by the PSSCH
  • M PSCCH is the number of RBs occupied by the PSCCH
  • P O_ PSSCH,4 and ⁇ PSSCH,4 are parameters configured by the higher layer
  • PL is the path loss
  • P MAX _ CBR is a value determined according to a Channel Busy Ratio (CBR)
  • P CMAX is the maximum transmitting power.
  • the ratio of the power of the PSSCH to the power of the PSCCH is ⁇
  • ⁇ is a parameter related to the modulation scheme and decreases with the increase of Q' m .
  • ⁇ (10log 10 (Q' m /Q' mPSCCH )) or , wherein, f(Q' m ) is a function using Q' m as a variable.
  • Q' m 6
  • ⁇ log10(3).
  • the power of the PSSCH is calculated by:
  • the power of the PSCCH is calculated by:
  • Way 3 The PSD of the PSCCH and/or the PSD of the PSSCH is determined according to the modulation scheme of the PSCCH and/or the modulation scheme of the PSSCH.
  • the power of the PSCCH is calculated by:
  • the power of the PSSCH is calculated by:
  • ⁇ 2 is a parameter related to the modulation scheme of the PSSCH.
  • ⁇ 2 Q' m /2, or , wherein, f(Q' m ) is a function using Q' m as a variable and increases with the increase of Q' m .
  • the PSSCH uses 64QAM, the P PSSCH has an increment of 4.7dB in comparison to the P PSSCH in QPSK.
  • the present application provides a user equipment, comprising a control information detecting module, a parameter determining module, a transmission resource selecting module and a decoding module, wherein:
  • control information detecting module for receiving a Physical Sidelink Control Channel (PSCCH) transmitted by other UEs and detecting Sidelink Control Information (SCI) transmitted through the PSCCH;
  • PSCCH Physical Sidelink Control Channel
  • SCI Sidelink Control Information
  • the parameter determining module for determining parameter information of a Physical Sidelink Shared Channel (PSSCH) scheduled by the SCI according to the SCI,;
  • PSSCH Physical Sidelink Shared Channel
  • the transmission resource selecting module for determining, according to the parameter information of the PSSCH, whether to receive and measure PSSCH-RSRP of the PSSCH scheduled by the SCI and/or a sidelink received signal strength indicator (S-RSSI), and selecting a transmission resource according to the measured information;
  • the decoding module for receiving, according to the SCI, the PSSCH scheduled by the SCI, and determining, according to the SCI, whether to decode the PSSCH.
  • the present invention further provides a user equipment, comprising a transmitted power determining module and a transmitting module, wherein:
  • SCI Sidelink Control Information
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • the transmitting power determining module for determining a Power Spectrum Density (PSD) offset of the PSSCH and the PSCCH by at least one of the following ways:
  • the PSD offset of the PSCCH relative to the PSSCH is not related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD offset of the PSCCH relative to the PSSCH is related to a modulation scheme of the PSSCH and a modulation scheme of the PSCCH, and the total power of the PSSCH and the PSCCH increases with the increase of the modulation scheme of the PSSCH and/or the modulation scheme of the PSCCH;
  • the PSD of the PSSCH is determined according to the modulation scheme of the PSSCH.
  • the transmitting module for performing transmission according to the power determined by the transmitting power determining module.
  • the present invention involves apparatuses for performing one or more of operations as described in the present application.
  • Those apparatuses may be specially designed and manufactured as intended, or may comprise known apparatuses in a general-purpose computer.
  • Those apparatuses have computer programs stored therein, which are selectively activated or reconstructed.
  • Such computer programs may be stored in device (such as computer) readable media or in any type of media suitable for storing electronic instructions and respectively coupled to a bus
  • the computer readable media include but are not limited to any type of disks (including floppy disks, hard disks, optical disks, CD-ROM and magneto optical disks), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memories, magnetic cards or optical cards.
  • readable media include any media storing or transmitting information in a device (for example, computer) readable form.

Landscapes

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

Abstract

La présente invention se rapporte à un procédé et à un système de communication permettant de faire converger un système de communication de 5ème génération (5G) pour prendre en charge des débits de données supérieurs à ceux d'un système de 4ème génération (4G) avec une technologie dédiée à l'Internet des objets (IoT pour Internet of Things). La présente invention peut être appliquée à des services intelligents basés sur la technologie de communication 5G et sur la technologie associée à l'Internet des objets, tels qu'une maison intelligente, un bâtiment intelligent, une ville intelligente, une voiture intelligente, une voiture connectée, des soins de santé, l'enseignement numérique, le commerce de détail intelligent et des services de sécurité et de sûreté. La présente invention porte sur un procédé et sur un dispositif pour des communications de véhicule vers tout (V2X). Le procédé consiste : à recevoir une signalisation de configuration transmise par un nœud B évolué (eNB) et, ensuite, à déterminer, en fonction de la signalisation de configuration, un espace de recherche correspondant à S-DCI_C et/ou une porteuse de transmission de S-DCI_C et/ou le nombre de bits correspondant à S-DCI_C ; ou à déterminer, en fonction de la signalisation de configuration, au moins une information de position temporelle facultative pour transmettre un signal de synchronisation de liaison latérale (SLSS pour Side Link Synchronization Signal) et un canal de diffusion de liaison latérale physique (PSBCH pour Physical Sidelink Broadcast CHannel) et, ensuite, sur la base d'un état de couverture indiquant si un premier équipement utilisateur (UE pour User Equipment) se trouve ou non dans une couverture de réseau cellulaire, en fonction du type d'une source de synchronisation de référence, à déterminer des informations de position temporelle à partir de la ou des informations de position temporelle facultatives pour transmettre le signal SLSS et le canal PSBCH, d'informations d'identité du signal SLSS à transmettre, et de la valeur du champ « dans la couverture » dans le canal PSBCH à transmettre. La présente invention concerne également un procédé de transmission et de réception dans une communication V2X, comprenant les étapes consistant : à détecter, au moyen d'un équipement utilisateur de premier type, un canal PSCCH dans un format de SCI X transmis par d'autres équipements utilisateurs, et à déterminer, en fonction de SCI X, s'il faut, ou non, mesurer PSSCH-RSRP d'un canal PSSCH planifié par le SCI X et s'il faut, ou non, décoder en outre le canal PSSCH planifié par le SCI X. Le procédé proposé par la présente invention comprend en outre les étapes consistant : à détecter, au moyen d'un équipement utilisateur de second type, un canal PSCCH dans le format de SCI X transmis par d'autres équipements utilisateurs et à déterminer, en fonction d'un champ de bits de modulation et de codage dans le SCI X et d'une règle de mappage TBS prédéfinie, une TBS d'un canal PSSCH planifié par le SCI X. Le procédé proposé par la présente invention comprend en outre l'étape consistant : à déterminer, au moyen d'un équipement utilisateur de second type et en fonction d'un schéma de modulation, la puissance de transmission du canal PSCCH du SCI X et la puissance de transmission du canal PSSCH planifié par le SCI X. Au moyen du procédé ci-dessus, la coexistence d'un équipement utilisateur V2X de premier type et d'un équipement utilisateur V2X de second type peut être mieux réalisée et l'efficacité de transmission de l'équipement utilisateur V2X de second type peut être améliorée.
PCT/KR2018/000907 2017-01-20 2018-01-19 Procédé et dispositif pour des communications de véhicule vers tout (v2x) ainsi que procédé et équipement de transmission et de réception dans une communication v2x WO2018135905A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020197020044A KR102592455B1 (ko) 2017-01-20 2018-01-19 V2X(vehicle to everything) 통신 방법 및 디바이스와 V2X 통신의 송수신 방법 및 장치
US16/479,357 US11032049B2 (en) 2017-01-20 2018-01-19 Method and device for vehicle to everything (V2X) communications and a transmitting and receiving method and equipment in V2X communication

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN201710042455.3 2017-01-20
CN201710042455 2017-01-20
CN201710064470.8 2017-02-04
CN201710064470.8A CN108616840A (zh) 2017-01-20 2017-02-04 一种车对外界v2x通信的方法及装置
CN201710184281.4 2017-03-24
CN201710184281 2017-03-24
CN201710265252.0 2017-04-21
CN201710265252 2017-04-21

Publications (1)

Publication Number Publication Date
WO2018135905A1 true WO2018135905A1 (fr) 2018-07-26

Family

ID=62909280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/000907 WO2018135905A1 (fr) 2017-01-20 2018-01-19 Procédé et dispositif pour des communications de véhicule vers tout (v2x) ainsi que procédé et équipement de transmission et de réception dans une communication v2x

Country Status (1)

Country Link
WO (1) WO2018135905A1 (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109640289A (zh) * 2018-11-30 2019-04-16 中国联合网络通信集团有限公司 一种通信方法及设备、通信系统
WO2020032698A1 (fr) * 2018-08-10 2020-02-13 엘지전자 주식회사 Procédé et appareil de coexistence de communications de liaison latérale associées à différentes technologies d'accès radio dans nr v2x
WO2020033563A1 (fr) * 2018-08-10 2020-02-13 Intel Corporation Signalisation de commande pour une nouvelle communication de véhicule à véhicule
CN110798297A (zh) * 2018-08-03 2020-02-14 维沃移动通信有限公司 一种旁链路信息传输方法及终端
CN110830950A (zh) * 2018-08-07 2020-02-21 普天信息技术有限公司 车载终端的模式配置和切换方法
CN111148062A (zh) * 2018-11-02 2020-05-12 电信科学技术研究院有限公司 一种资源分配方法、装置及网络设备
CN111756513A (zh) * 2019-03-26 2020-10-09 北京三星通信技术研究有限公司 控制信息的传输方法、装置、电子设备及存储介质
WO2020210287A1 (fr) * 2019-04-08 2020-10-15 Apple Inc. Structures de liaison latérale v2x nr pour amélioration de couverture pscch
WO2020221241A1 (fr) * 2019-04-30 2020-11-05 夏普株式会社 Procédé exécuté par un équipement utilisateur et équipement utilisateur
WO2020246818A1 (fr) * 2019-06-04 2020-12-10 엘지전자 주식회사 Procédé de transmission de signal en liaison latérale dans un système de communication sans fil
WO2020256364A1 (fr) * 2019-06-21 2020-12-24 엘지전자 주식회사 Communication de liaison latérale sur la base d'une table de mcs
CN112740828A (zh) * 2018-09-21 2021-04-30 株式会社Ntt都科摩 用户装置及基站装置
WO2021097729A1 (fr) * 2019-11-20 2021-05-27 华为技术有限公司 Procédé de transmission de canal de commande à deux niveaux, dispositifs terminaux et appareils de communication
WO2021147214A1 (fr) * 2020-01-23 2021-07-29 华为技术有限公司 Procédé de communication et appareil de communication
WO2021147770A1 (fr) * 2020-01-20 2021-07-29 维沃移动通信有限公司 Procédé et dispositif de transmission de données
CN113796142A (zh) * 2019-05-02 2021-12-14 三星电子株式会社 在无线通信系统中发送和接收旁路控制信息的方法和装置
CN114071430A (zh) * 2020-08-05 2022-02-18 诺基亚技术有限公司 确定侧链路通信的信道占用
US20220086782A1 (en) * 2019-01-10 2022-03-17 Mediatek Singapore Pte. Ltd. Sidelink synchronization signal block (s-ssb) design
US20220124679A1 (en) * 2019-01-09 2022-04-21 Idac Holdings, Inc. Wireless resource allocation schemes in vehicle-to-everything (v2x) communication
CN114503470A (zh) * 2019-11-14 2022-05-13 现代自动车株式会社 用于在通信系统中发送和接收侧链路数据的方法和装置
CN114616897A (zh) * 2019-11-01 2022-06-10 高通股份有限公司 动态物理侧链路控制信道增益
CN114844596A (zh) * 2019-08-16 2022-08-02 华为技术有限公司 侧行链路信道状态信息传输的方法和通信装置
CN114930762A (zh) * 2019-12-04 2022-08-19 Lg 电子株式会社 在nr v2x中发送控制信息的方法和装置
EP4013161A4 (fr) * 2019-09-30 2022-10-12 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé et dispositif de transmission de données
US11641627B2 (en) * 2019-08-02 2023-05-02 Qualcomm Incorporated Power control indication in groupcast sidelink communications
US11924927B2 (en) 2018-08-08 2024-03-05 Interdigital Patent Holdings, Inc. UU interface enhancement for NR V2X

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016018068A1 (fr) * 2014-07-29 2016-02-04 엘지전자 주식회사 Procédé de transmission d'informations de ressources pour des communications d2d et appareil associé dans un système de communication sans fil
CN105681439A (zh) * 2016-01-29 2016-06-15 宇龙计算机通信科技(深圳)有限公司 用于车辆通信的资源调度方法、装置、终端和基站
US20160295624A1 (en) * 2015-04-02 2016-10-06 Samsung Electronics Co., Ltd Methods and apparatus for resource pool design for vehicular communications
KR20160128296A (ko) * 2014-03-20 2016-11-07 엘지전자 주식회사 무선 통신 시스템에서 신호를 송수신하기 위한 방법 및 이를 위한 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160128296A (ko) * 2014-03-20 2016-11-07 엘지전자 주식회사 무선 통신 시스템에서 신호를 송수신하기 위한 방법 및 이를 위한 장치
WO2016018068A1 (fr) * 2014-07-29 2016-02-04 엘지전자 주식회사 Procédé de transmission d'informations de ressources pour des communications d2d et appareil associé dans un système de communication sans fil
US20160295624A1 (en) * 2015-04-02 2016-10-06 Samsung Electronics Co., Ltd Methods and apparatus for resource pool design for vehicular communications
CN105681439A (zh) * 2016-01-29 2016-06-15 宇龙计算机通信科技(深圳)有限公司 用于车辆通信的资源调度方法、装置、终端和基站

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI: "DCI design for V2V", R1-166203, 3GPP TSG RAN WG1 MEETING #86, 12 August 2016 (2016-08-12), Gothenburg, Sweden, XP051142164, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WGl_RLl/TSGRl_86/Docs> *

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110798297A (zh) * 2018-08-03 2020-02-14 维沃移动通信有限公司 一种旁链路信息传输方法及终端
CN110830950A (zh) * 2018-08-07 2020-02-21 普天信息技术有限公司 车载终端的模式配置和切换方法
CN110830950B (zh) * 2018-08-07 2022-12-30 普天信息技术有限公司 车载终端的模式配置和切换方法
US11924927B2 (en) 2018-08-08 2024-03-05 Interdigital Patent Holdings, Inc. UU interface enhancement for NR V2X
CN112534936A (zh) * 2018-08-10 2021-03-19 Lg 电子株式会社 Nr v2x中与不同rat有关的侧链路通信共存的方法和设备
WO2020032698A1 (fr) * 2018-08-10 2020-02-13 엘지전자 주식회사 Procédé et appareil de coexistence de communications de liaison latérale associées à différentes technologies d'accès radio dans nr v2x
WO2020033563A1 (fr) * 2018-08-10 2020-02-13 Intel Corporation Signalisation de commande pour une nouvelle communication de véhicule à véhicule
US20210204307A1 (en) * 2018-08-10 2021-07-01 Lg Electronics Inc. Method and apparatus for coexistence of sidelink communications related to different rats in nr v2x
CN112740828A (zh) * 2018-09-21 2021-04-30 株式会社Ntt都科摩 用户装置及基站装置
CN112740828B (zh) * 2018-09-21 2024-04-16 株式会社Ntt都科摩 用户装置及基站装置
CN111148062A (zh) * 2018-11-02 2020-05-12 电信科学技术研究院有限公司 一种资源分配方法、装置及网络设备
CN109640289A (zh) * 2018-11-30 2019-04-16 中国联合网络通信集团有限公司 一种通信方法及设备、通信系统
US20220124679A1 (en) * 2019-01-09 2022-04-21 Idac Holdings, Inc. Wireless resource allocation schemes in vehicle-to-everything (v2x) communication
US20220086782A1 (en) * 2019-01-10 2022-03-17 Mediatek Singapore Pte. Ltd. Sidelink synchronization signal block (s-ssb) design
CN111756513A (zh) * 2019-03-26 2020-10-09 北京三星通信技术研究有限公司 控制信息的传输方法、装置、电子设备及存储介质
WO2020210287A1 (fr) * 2019-04-08 2020-10-15 Apple Inc. Structures de liaison latérale v2x nr pour amélioration de couverture pscch
CN113678517A (zh) * 2019-04-08 2021-11-19 苹果公司 用于pscch覆盖增强的nr v2x侧链路结构
WO2020221241A1 (fr) * 2019-04-30 2020-11-05 夏普株式会社 Procédé exécuté par un équipement utilisateur et équipement utilisateur
CN113796142A (zh) * 2019-05-02 2021-12-14 三星电子株式会社 在无线通信系统中发送和接收旁路控制信息的方法和装置
WO2020246818A1 (fr) * 2019-06-04 2020-12-10 엘지전자 주식회사 Procédé de transmission de signal en liaison latérale dans un système de communication sans fil
WO2020256364A1 (fr) * 2019-06-21 2020-12-24 엘지전자 주식회사 Communication de liaison latérale sur la base d'une table de mcs
US11477765B2 (en) 2019-06-21 2022-10-18 Lg Electronics Inc. Sidelink communication based on MCS table
US11641627B2 (en) * 2019-08-02 2023-05-02 Qualcomm Incorporated Power control indication in groupcast sidelink communications
CN114844596A (zh) * 2019-08-16 2022-08-02 华为技术有限公司 侧行链路信道状态信息传输的方法和通信装置
CN114844596B (zh) * 2019-08-16 2023-04-11 华为技术有限公司 侧行链路信道状态信息传输的方法和通信装置
EP4013161A4 (fr) * 2019-09-30 2022-10-12 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé et dispositif de transmission de données
EP4246862A3 (fr) * 2019-09-30 2023-11-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé et dispositif de transmission de données
CN114616897A (zh) * 2019-11-01 2022-06-10 高通股份有限公司 动态物理侧链路控制信道增益
CN114503470A (zh) * 2019-11-14 2022-05-13 现代自动车株式会社 用于在通信系统中发送和接收侧链路数据的方法和装置
WO2021097729A1 (fr) * 2019-11-20 2021-05-27 华为技术有限公司 Procédé de transmission de canal de commande à deux niveaux, dispositifs terminaux et appareils de communication
CN114930762B (zh) * 2019-12-04 2023-11-28 Lg 电子株式会社 在nr v2x中发送控制信息的方法和装置
CN114930762A (zh) * 2019-12-04 2022-08-19 Lg 电子株式会社 在nr v2x中发送控制信息的方法和装置
WO2021147770A1 (fr) * 2020-01-20 2021-07-29 维沃移动通信有限公司 Procédé et dispositif de transmission de données
WO2021147214A1 (fr) * 2020-01-23 2021-07-29 华为技术有限公司 Procédé de communication et appareil de communication
US11818598B2 (en) 2020-08-05 2023-11-14 Nokia Technologies Oy Determining channel occupancy for sidelink communication
CN114071430A (zh) * 2020-08-05 2022-02-18 诺基亚技术有限公司 确定侧链路通信的信道占用
CN114071430B (zh) * 2020-08-05 2024-03-22 诺基亚技术有限公司 确定侧链路通信的信道占用

Similar Documents

Publication Publication Date Title
WO2018135905A1 (fr) Procédé et dispositif pour des communications de véhicule vers tout (v2x) ainsi que procédé et équipement de transmission et de réception dans une communication v2x
WO2020222568A1 (fr) Procédé, dispositif de réception et dispositif d&#39;émission pour communication de liaison latérale
WO2021029674A1 (fr) Procédé et appareil d&#39;émission et de réception d&#39;un signal rétroactif dans un système de communication sans fil
WO2021060936A1 (fr) Attribution de ressources et procédé de commande de puissance pour système de communication de liaison latérale
WO2020167019A1 (fr) Procédé, dispositif terminal, station de base, support lisible par ordinateur pour mesurer une interférence de liaison croisée, et procédés et appareils pour attribution, détermination, et transmission de données, de préambule d&#39;accès aléatoire
WO2017126940A1 (fr) Procédé et appareil permettant de transmettre des informations de commande de liaison montante dans un système d&#39;agrégation de porteuse
WO2019098697A1 (fr) Procédé de traitement d&#39;informations de commande de liaison montante et terminal
WO2019017749A1 (fr) Appareil et procédé de codage et de décodage de canal dans un système de communication ou de diffusion
EP3695559A1 (fr) Procédé de traitement d&#39;informations de commande de liaison montante et terminal
WO2020222577A1 (fr) Procédé et appareil permettant de transmettre et de recevoir des informations de commande de liaison latérale dans un système de communication sans fil
WO2020130573A1 (fr) Procédé et appareil de configuration d&#39;espace de recherche commun pour signal de découverte et canal
WO2017196083A1 (fr) Procédé et appareil destinés à transmettre des informations de réglage de ressource pour un canal de commande, procédé et appareil destinés à transmettre des informations de réglage de ressource pour drs de liaison montante, procédé et appareil destinés à transmettre un indicateur indiquant un type de sous-trame/créneau, et procédé et appareil destinés à transmettre un nombre de symboles de liaison descendante
WO2020067828A1 (fr) Procédé de détection et procédé de transmission d&#39;un canal physique de commande de liaison descendante, et équipements correspondants
WO2018084626A1 (fr) Procédé et dispositif de régulation de la puissance d&#39;émission d&#39;un équipement d&#39;utilisateur dans un système à conformation de faisceau
WO2019093768A1 (fr) Procédé et appareil d&#39;émission et de réception d&#39;informations de commande dans un système de communication sans fil
WO2022030951A1 (fr) Procédé et appareil de transmission de liaison montante dans un système de communication sans fil
WO2021015475A1 (fr) Procédé et dispositif de rapport d&#39;informations d&#39;état de canal dans un système de communications sans fil
WO2021010657A1 (fr) Procédé et appareil pour définir un temps d&#39;occupation d&#39;une unité de traitement d&#39;informations d&#39;état de canal d&#39;un terminal dans un système de communication sans fil
WO2022146082A1 (fr) Procédé et appareil pour déterminer un temps de traitement d&#39;un ue dans un système de communication sans fil
WO2020022835A1 (fr) Améliorations apportées et se rapportant à une configuration de signal de référence de positionnement dans un système de télécommunication
WO2022131683A1 (fr) Procédé et dispositif de transmission et de réception d&#39;un signal de liaison montante dans un système de communication sans fil prenant en charge une communication coopérative
WO2021066536A1 (fr) Procédé et appareil de transmission de données pour la communication sans fil
WO2023008915A1 (fr) Procédé et appareil de transmission sur des canaux de liaison montante se chevauchant dans un système de communication sans fil
WO2022203467A1 (fr) Procédé et appareil permettant de rapporter une marge de puissance de liaison montante dans un système de communication sans fil
WO2019235868A1 (fr) Procédé d&#39;indication d&#39;informations relatives à un dmrs de v2x dans un système nr et dispositif correspondant

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18741992

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20197020044

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18741992

Country of ref document: EP

Kind code of ref document: A1