WO2018009886A1 - Coexistence de multiples technologies dans le spectre de service de transport intelligent non autorisé par licence - Google Patents

Coexistence de multiples technologies dans le spectre de service de transport intelligent non autorisé par licence Download PDF

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Publication number
WO2018009886A1
WO2018009886A1 PCT/US2017/041229 US2017041229W WO2018009886A1 WO 2018009886 A1 WO2018009886 A1 WO 2018009886A1 US 2017041229 W US2017041229 W US 2017041229W WO 2018009886 A1 WO2018009886 A1 WO 2018009886A1
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WIPO (PCT)
Prior art keywords
channel
communication technology
communication
technology
short range
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PCT/US2017/041229
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English (en)
Inventor
Kapil Gulati
Gaurav Gupta
Shailesh Patil
Durga Prasad Malladi
Sudhir Kumar Baghel
Marco Papaleo
Original Assignee
Qualcomm Incorporated
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.)
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Priority claimed from US15/465,877 external-priority patent/US10477371B2/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2018009886A1 publication Critical patent/WO2018009886A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP Third Generation Partnership Project
  • LTE is designed to support mobile broadband access through improved spectral efficiency, lowered costs, and improved services using OFDMA on the downlink, SC-FDMA on the uplink, and multiple-input multiple-output (MIMO) antenna technology.
  • MIMO multiple-input multiple-output
  • the apparatus may be a UE.
  • the UE may include means for detecting whether a second communication technology different from a first communication technology utilized by the UE is active on a first channel.
  • the UE may include means for performing, based on the detection, an action associated with assigning the first communication technology to at least one of the first channel or a second channel.
  • the apparatus may be a UE including a memory and at least one processor coupled to the memory.
  • the at least one processor may be configured to: detect whether a second communication technology different from a first communication technology utilized by the UE is active on a first channel, and perform, based on the detection, an action associated with assigning the first communication technology to at least one of the first channel or a second channel.
  • a computer-readable medium storing computer executable code may include code to: detect whether a second communication technology different from a first communication technology utilized by the UE is active on a first channel, and perform, based on the detection, an action associated with assigning the first communication technology to at least one of the first channel or a second channel.
  • FIG. 10 is an example flow diagram illustrating an aspect of the disclosure.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • such computer- readable media can comprise a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macro cells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG).
  • eNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • the UE 104 may be configured to consider existence of different technologies over different channels and perform a corresponding action based on at least one of a channel, a priority, a type of technology. (198).
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demuliplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with header
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer- readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the first device 512 and the second device 532 may be connected (e.g., in connected mode with the base station) to a base station 550.
  • the first device 512 and the second device 532 may also be configured to perform D2D communication with each other over LTE.
  • the first device 512 and the second device 532 may also perform short range communication with each other using DSRC over IEEE 802. l ip.
  • the communication between the first device 512 and the second device 532 may be V2V, V2X, or V2P communication.
  • the configuration for a technology may be provided by at least one of a dynamic configuration or a pre-configuration.
  • the dynamic configuration may include an RRC signal (e.g., from a server or a base station), and/or a signal from an ITS server and/or signaling from an operator- controlled server, and the preconfiguration may include a preconfiguration within the UE and/or via a preconfiguration within a universal integrated circuit card (UICC).
  • RRC signal e.g., from a server or a base station
  • the preconfiguration may include a preconfiguration within the UE and/or via a preconfiguration within a universal integrated circuit card (UICC).
  • UICC universal integrated circuit card
  • the action by the UE for the first technology may be one of remaining on the current channel for communication via the first technology, vacating the current channel for communication via the first technology, or performing communication on the current channel in a TDM manner (e.g., by sharing the current channel between the first technology and second technology). If the action is remaining on the current channel, the UE may remain on the current channel with the first technology and continue to communicate via the first technology. If the action is vacating the current channel, the UE may vacate the current channel of the current technology, and may further move to another channel having a lower priority than the current channel for communication via the first technology. If the action is performing communication in a TDM manner, the UE may perform communication via the first technology such that the current channel may be shared between the first technology and the second technology. For example, on the current channel, the UE may use the current channel to perform communication using the first technology during certain time periods and the second technology may use the current channel during other time periods.
  • a TDM manner e.g., by sharing the current channel between the first technology
  • Example configuration #1 is for the UE utilizing a first technology (e.g., LTE D2D).
  • Channel 1 may be utilized geographical regions 1 and 2, and is associated with priority #1 (e.g., the highest priority).
  • Channel 2 may be utilized in geographical regions 1 and 2, and is associated with priority #2.
  • Channel 3 may be utilized in geographical region 1 and is associated with priority #3 (e.g., lowest priority).
  • the UE utilizing the first technology to communicate on Channel 1 remains on Channel 1 if a different technology is detected on Channel 1.
  • the action performed upon detection of another technology may be specific to the another technology detected.
  • the UE currently utilizing a first technology on a particular channel may perform a certain action when a second technology is detected on the particular channel, and may perform a certain action when a third technology is detected on the particular channel.
  • the UE currently utilizing a first technology on a particular channel may perform a certain action when a second technology is detected on the particular channel, and may perform a certain action when a third technology is detected on the particular channel.
  • Channel 1 may be utilized in geographical regions 1 and 2, and is associated with priority #1 (e.g. a highest priority).
  • Channel 2 may be utilized in geographical regions 1 and 2, and is associated with priority #2.
  • Channel 3 may be utilized in geographical region 1 and is associated with priority #3 (e.g., the lowest priority).
  • Ch-1 2 Vacate Ch-1 1
  • the UE utilizing the first technology on the channel may determine that a second technology is detected on the same channel and may perform a configured action for the channel if the UE itself determines that the second technology is detected on the same channel and/or additionally receives from a second UE a message indicating that the second technology on the same channel is detected.
  • the UE utilizing the first technology on a channel may determine that another technology is detected on the same channel if the UE receives at least M messages from respective UEs, where M is a message number threshold and where each message indicates detection of another technology on the channel by a respective UE. For example, if M is 3 and the UE utilizing the first technology on a channel receives two messages (e.g., from two respective UEs) indicating detection of another technology on the channel, the UE may determine that another technology is not detected on the channel and may not perform the action configured for a case where another technology is detected.
  • a UE utilizing a first technology on a high priority channel vacates the high priority channel of the first technology upon detection of another technology on the high priority channel, the UE may move communication using the first technology to a lower priority channel.
  • having the UE continue to utilize the first technology on the lower priority may not be desirable, especially if the higher priority channel becomes free of use by other technologies later. Therefore, a feature to check whether a higher priority channel is available may be desired.
  • the UE may be configured to periodically check availability of one or more higher priority channels.
  • the UE may start periodically checking availability of a higher priority channel when a predefined time (e.g., TVacate) has passed after vacating a higher priority channel of the first technology. For example, when Tvacate (e.g., 10 seconds) expires after vacating a higher priority channel of the first technology, the UE may start to periodically check availability of the higher priority channel.
  • a predefined time e.g., TVacate
  • the multi-mode UE may be configured not to utilize any technology for communication on the higher priority channel being checked for availability during the checking time slots. For example, if a UE that is checking for availability for the first technology on a high priority channel transmits using the second technology on the high priority channel, the UE may detect the second technology and thus may determine that the high priority channel is unavailable for the first technology. Thus, in an aspect, a UE that is listening on the high priority channel (e.g., to check availability of the high priority channel) should not transmit on the high priority channel.
  • the UE utilizing a channel with a first technology may detect another different technology by detecting a sequence that indicates the different technology, where the sequence may be a periodically transmitted sequence.
  • the second UE may periodically transmit the sequence indicating the different technology.
  • a second UE will periodically transmit the sequence if the second UE has transmitted data within the last time interval (e.g. within the last 1 second).
  • the second UE may periodically transmit the sequence such that the UE may detect the different technology based on the transmitted sequence, if the second UE has transmitted data within the last 1 second.
  • the UE may detect another technology by observing the received energy that exceeds a configured technology threshold, and the fraction of the received energy that the UE was able to decode using the UE's own technology on the channel. If the fraction falls below a configured technology threshold, then the UE determines presence of another technology.
  • the third approach may be expressed as:
  • the UE utilizing a first technology may detect another technology on a channel by considering energy instances where received energy (Ec) on the resources is greater than an energy threshold (Th) and decoded instances where the decoded energy (Ed) indicates that a signal can be decoded (e.g., using the first technology on the channel) for the resources with energy (Ec) greater than a threshold (Th), per probe time (Tp). If the ratio of the decode instances to the energy instances falls below a technology threshold (Thi), then the UE determines that another technology is present on the channel, in addition to the first technology utilized by the UE. If the ratio of the decode instances to the energy instances does not fall below the technology threshold (Thi), then the UE may determine that another technology is not present and may determine that only the first technology utilized by the UE is present.
  • Th energy threshold
  • Thi technology threshold
  • the UE may determine that another technology is not present and may determine that only the first technology utilized by the UE is present.
  • the UE may determine whether the second communication technology is active on the first channel by monitoring for one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, where the detecting whether the second communication technology is active on the first channel is based on the one or more messages.
  • a UE utilizing the first technology on a channel may receive a message from a second UE where the message indicates that the second UE utilizing the first technology on the same channel has detected another technology on the same channel and is taking a configured action (e.g., vacate or TDM).
  • the UE may detect whether the second communication technology is active on the first channel by: identifying, on the first channel, one or more resources whose energy levels are greater than an energy threshold, determining that the second communication technology is detected on the first channel if a fraction based on an amount of decodable energy of the one or more resources on the first channel and an overall energy of the one or more resources is less than an fraction threshold, and determining that the second communication technology is not detected on the first channel if the fraction based on the amount of the decodable energy of the one or more resources on the first channel and the overall energy of the one or more resources is greater than the fraction threshold.
  • the action by the UE for a first technology may be one of staying on the current channel with the first technology, vacating the current channel of the first technology, or performing communication in a TDM manner (e.g., by sharing the current channel between the first technology and second technology).
  • the UE may perform additional features, as discussed infra.
  • a UE utilizing the first technology on a channel may receive a message from a second UE where the message indicates that the second UE utilizing the first technology on the same channel has detected another technology on the same channel and is taking a configured action (e.g., vacate or TDM).
  • the UE relays the one or more messages to another UE. For example, as discussed supra, after receiving the message from the second UE, the UE may relay the message to another UE.
  • a UE utilizing the first technology on a channel may receive a message from a second UE where the message indicates that the second UE utilizing the first technology on the same channel has detected another technology on the same channel and is taking a configured action (e.g., vacate channel or share channel via TDM).
  • the UE relays the one or more message if a relay hop count is less than a relay hop count limit, wherein the one or more message indicates the relay hop count.
  • the UE may determine to relay the message if a relay hop count is less than a relay hop count limit N, which may be a preconfigured number, where the relay hop count may be included in the message.
  • each checking session may be periodically performed during a checking time duration. For example, as discussed supra, if a UE utilizing a first technology is not utilizing the first technology on a high priority channel (e.g., highest priority channel) or is utilizing the first technology on a lowest priority channel, then the UE is configured to periodically check availability of one or more higher priority channels.
  • a high priority channel e.g., highest priority channel
  • the UE is configured to periodically check availability of one or more higher priority channels.
  • the UE may increase Nslots_free (e.g., exponentially) if the UE determines the higher priority channel to be available, but later vacates the higher priority channel of the first technology within a certain time window (e.g., TVacate) after determining the higher priority channel to be available.
  • the UE may perform the checking session further by: if the UE is a multi-mode UE capable of utilizing the first communication technology and the second communication technology, refraining from utilizing the first communication technology and the second communication technology on the first channel during the checking time duration.
  • the multi-mode UE may be configured not to utilize any technology for communication on the higher priority channel being checked for availability during the checking time slots.
  • LTE V2V communication based on LTE may coexist with short range communication (e.g., DSRC based on IEEE 802. l ip) in an unlicensed spectrum.
  • short range communication e.g., DSRC based on IEEE 802. l ip
  • the coexistence of the LTE V2V communication with the short range communication in the unlicensed spectrum may be similar to coexistence of LTE in the unlicensed spectrum with Wifi, for example, via license assisted access (LAA).
  • LAA license assisted access
  • a UE may determine whether short range communication (e.g., DSRC) is being performed on a particular channel in the unlicensed spectrum and may refrain from performing cellular D2D communication (e.g., LTE V2V communication) on the channel in the unlicensed spectrum when the channel occupied by short range communication.
  • the UE may initially determine the priority level of each channel of multiple channels in the unlicensed spectrum. For LTE V2V communication, each channel of the multiple channels may be assigned a respective priority level (e.g., from a system level perspective).
  • the UE may be configured to perform LTE V2V communication on a channel with a higher priority level rather than on a channel with a lower priority level.
  • the eNB may indicate the priority level associated with each channel of the multiple channels (e.g., by communicating messages including priority information to the UEs), and/or the priority level of each channel of the multiple channels may be preconfigured for the UEs.
  • the priority levels for the channels in the unlicensed spectrum may be determined based on a region (e.g., assigned by an operator using the channels in the region) and/or may be determined randomly.
  • the priority levels may be determined by UEs. For example, each UE may assign a higher priority level to a channel that is less occupied by short range communication.
  • a UE may determine a level of short range communication on a particular channel according to a past communication history involving the particular channel, and may assign a priority level based on the level of short range communication. In one example, the UE may assign a higher priority level to a channel that has been less frequently occupied by short range communication than another channel according to the past communication history.
  • Such channel sensing may ensure that LTE V2V UEs in a local area are able to transmit and receive on the same channel, and may be useful for LTE V2V communication between UEs with a limited number of transmit and receive chains.
  • the UE may detect whether each of the channels with the highest priority level is occupied by the short range communication and may perform a LTE V2V communication on a channel with the highest priority level that is not occupied by the short range communication.
  • the UE may determine whether other channels are available for LTE V2V communication (e.g., if the UE is attempting to perform LTE V2V communication). If no other channels are available for LTE V2V communication, the UE may refrain from performing LTE V2V communication.
  • the UE may perform LTE V2V communication using one of the other channels available for LTE V2V communication.
  • the UE may utilize a channel (of the other channels) with the highest priority level among the other channels available for LTE V2V communication (e.g., and not occupied by short range communication).
  • the UE may select a channel with the highest priority level of the other channels that are available for LTE V2V communication and are not occupied by short range communication, and perform LTE V2V communication using the selected channel.
  • the UE may assume that information such as the interference pattern, semi-persistent scheduling (SPS) characteristics, and scheduling assignment (SA) decoding information will be carried over from a prior channel (e.g., the highest priority channel) to the new channel (e.g., the second highest priority channel).
  • SPS semi-persistent scheduling
  • SA scheduling assignment
  • the UE may use such information in the new channel.
  • the UE may additionally consider a new interference partem observed in the new channel during LTE V2V communication on the new channel.
  • the UE may perform short range communication on the highest priority channel, in addition to performing LTE V2V communication on another channel (e.g., the second highest priority channel) available for LTE V2V communication (e.g., in the unlicensed spectrum). As such, the UE may perform both the short range communication and the LTE V2V communication at the same time. The UE may consider any RF limitations on the highest priority channel before performing short range communication on the highest priority channel.
  • the UE may not perform LTE V2V communication. If the UE does not have short range communication capability, the UE may perform the LTE V2V on a channel available for LTE V2V communication, without performing short range communication. [00103] If the UE does not detect the presence of short range communication on the highest priority channel, the UE (and other UEs in the local area) may utilize the highest priority channel for LTE V2V communication.
  • the UE may perform LTE V2V communication on the highest priority channel and the UE may perform short range communication on a channel with a highest priority among channels that are not occupied by LTE V2V communication.
  • the UE may distinguish between short range communication from another UE without LTE V2V capability and short range communication from another UE with LTE V2V capability.
  • the UE may periodically employ a silence period during which a UE with LTE V2V capability does not transmit short range communication.
  • the length of the silence period may be a function of short range communication parameters including maximum length of short range transmission and a maximum sensing period.
  • LTE V2V UEs may sense the higher priority channel during the silence period and check whether short range communication from a UE without LTE V2V capability exists on the higher priority channel.
  • the UE may determine that some other UE without LTE V2V capability is transmitting short range communication during the silence period if the UE senses presence of a short range communication during the silence period.
  • the UE may assume that the higher priority channel is occupied by a short range communication, and thus may not perform LTE V2V communication on the higher priority channel.
  • the UE with LTE V2V capability e.g., and other UEs with LTE V2V capability
  • the UE may assume that information such as the interference partem, SPS characteristics, and SA decoding information will be carried over from a prior channel (e.g., lower priority channel) to the higher priority channel, where the priori channel is a channel before switching to the higher priority channel.
  • a prior channel e.g., lower priority channel
  • the UE may use such information (e.g., the SPS characteristics and/or SA decoding information) on the higher priority channel.
  • the UE may additionally consider new interference pattern on the higher priority channel during LTE V2V communication on the higher priority channel.
  • the UE initially determines priority levels of the channels, where Channels 1, 2, 3, and 4 have priority levels 1, 2, 3, and 4, respectively.
  • the UE senses whether DSRC is performed on Channel 1, the channel with the highest priority out of Channels 1-4. If the UE senses DSRC on Channel 1, the UE determines whether any of Channels 2-4 are available for LTE V2V communication. If Channels 2-4 are available for LTE V2V communication, at 1006, the UE selects Channel 2 for LTE V2V communication because Channel 2 has the highest priority level among Channels 2-4. Thus, the UE may perform LTE V2V communication using Channel 2. The UE may also perform DSRC on Channel 1, at 1008, if the UE has DSRC capability.
  • the UE may possibly perform DSRC on one or more of Channels 2-4, at 1014.
  • the UE may detect short range communication on a channel by detecting a preamble in data received on the channel and/or detecting energy (e.g., an energy greater than an energy threshold) on the channel.
  • the UE may determine whether the first channel is occupied by short range wireless communication by: determining whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, if the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, determining that the first channel is occupied by short range wireless communication, and if the short range wireless communication in the first channel is transmitted by a UE with cellular D2D capability and is not transmitted by a UE without cellular D2D capability, determining that the first channel is not occupied by short range wireless communication.
  • the UE may assume that the higher priority channel is not occupied by the short range communication, and thus may allow LTE V2V communication on the higher priority channel, even if a UE with LTE V2V capability transmits a short range communication on the higher priority channel.
  • the UE may assume that the higher priority channel is occupied by the short range communication, and thus may not allow LTE V2V communication on the higher priority channel.
  • the UE may determine whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability by determining whether a UE without cellular D2D capability transmits short range wireless communication in the first channel during a silence period, where no UE with cellular D2D capability is configured to perform short range wireless communication in the first channel during the silence period, where one or more UEs including the UE may be configured to perform cellular D2D communication in the first channel if a UE without cellular D2D capability during a silence period does not transmit short range wireless communication in the first channel.
  • the UE may perform features described infra at 1106. On the other hand, in an aspect, if the first channel is occupied by the short range wireless communication and the UE is capable of short range wireless communication, at 1108, the UE may perform short range wireless communication using the first channel. For example, as discussed supra, if the UE detects presence of short range communication on the highest priority channel when sensing on the highest priority channel, the UE may determine to perform short range wireless communication on the highest priority channel if the UE is capable of short range wireless communication.
  • the cellular D2D communication may be cellular V2V communication.
  • LTE V2V communication may be used for cellular D2D communication.
  • the short range wireless communication may be a DSRC.
  • the short range wireless communication may be based on IEEE 802. l ip.
  • the DSRC provides a short-range wireless communication capability, typically based on IEEE 802. l ip that is similar to Wifi.
  • the priority level of each channel of the plurality of channels is indicated by a base station or is preconfigured in the UE.
  • the eNB may indicate the priority levels for the channels (e.g., by communicating messages including priority information to the UEs), and/or the priority levels may be preconfigured for the UEs.
  • FIG. 12 is a flowchart 1200 of a method of wireless communication, expanding from the flowchart 1100 of FIG. 11.
  • the method may be performed by a UE (e.g., the UE 512, the apparatus 1402/1402').
  • the flowchart 1200 continues from 1112 in the flowchart 1100 of FIG. 11 if the UE determines at least one of the one or more remaining channels is available for cellular D2D communication.
  • the UE performs the cellular D2D communication using one of the at least one of the one or more remaining channels that is available for the cellular D2D communication.
  • a priority level of the one of the at least one of the one or more remaining channels is the highest among priority levels of the one or more remaining channels. For example, as discussed supra, if other channels are available for LTE V2V communication (e.g., and not occupied by short range communication), the UE may perform LTE V2V communication using one of the channels available for LTE V2V communication. For example, as discussed supra, to perform LTE V2V communication, the UE may utilize a channel (of the other channels) with the highest priority level among the other channels available for LTE V2V communication (e.g., and not occupied by short range communication).
  • the UE may perform the cellular D2D communication using one of the at least one of the one or more remaining channels that is available for the cellular D2D communication by performing the cellular D2D communication using the one of the at least one of the one or more remaining channels based on at least one of a interference pattern, SPS characteristics, or SA decoding information from previous use of the first channel.
  • the UE may perform the LTE V2V on a channel available for LTE V2V communication, without performing short range communication.
  • the UE may perform the cellular D2D communication using one of the at least one of the one or more remaining channels that is available for the cellular D2D communication by performing the cellular D2D communication using a second channel with a highest priority level of the at least one of the one or more remaining channels that is available for the cellular D2D communication.
  • the UE may utilize a channel with the highest priority level among the channels available for LTE V2V communication.
  • the UE performs short range wireless communication using the first channel. For example, as discussed supra, in a case where the UE detects presence of short range communication on the highest priority channel and other channels are available for LTE V2V communication, if the UE in addition has short range communication capability, then the UE continues to perform short range communication on the highest priority channel.
  • FIG. 13B is a flowchart 1350 of a method of wireless communication, expanding from the flowchart 1100 of FIG. 11.
  • the method may be performed by a UE (e.g., the UE 512, the apparatus 1402/1402').
  • the flowchart 1300 continues from 1106 in the flowchart 1100 of FIG. 11 if the first channel is not occupied by the short range wireless communication. If the first channel is not occupied by the short range wireless communication, at 1352, the UE determines whether at least one of the one or more remaining channels is occupied by short range wireless communication.
  • the UE with short range communication capability may search for channels occupied by short range communication (e.g., and/or for channels available for short range communication) in channels other than the highest priority level channel. If at least one of the one or more remaining channels is occupied by short range wireless communication and the UE is capable of short range wireless communication, at 1354, the UE performs short range wireless communication using the at least one of the one or more remaining channels.
  • the UE may perform short range communication in the channel occupied by the short range communication (e.g., DSRC-occupied channel) (e.g., and may perform LTE V2V communication on the highest priority channel).
  • determining e.g., by the UE) whether at least one of the one or more remaining channels is occupied by short range wireless communication may be performed if the UE has short range wireless communication capability.
  • the UE with the short range communication capability may search for channels occupied by short range communication (e.g., and/or for channels available for short range communication) in channels other than the highest priority level channel.
  • the technology management component 1408 detects whether a second communication technology different from a first communication technology utilized by the UE is active on a first channel.
  • the technology management component 1408 may perform such detection via the reception component 1404 at 1462, and may forward the results of the detection to the action management component 1410, at 1464.
  • the technology management component 1408 may determine whether the second communication technology is active on the first channel by monitoring for one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, where the detecting whether the second communication technology is active on the first channel is based on the one or more messages.
  • the technology management component 1408 may detect whether the second communication technology is active on the first channel further by: if one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology are received, determining that the second communication technology is detected on the first channel, and if no message indicating that another UE has determined to vacate the first channel of the first communication technology is received, determining that the second communication technology is not detected on the first channel.
  • the technology management component 1408 may detect whether the second communication technology is active on the first channel by receiving a sequence indicating the second communication technology. In an aspect, the technology management component 1408 may detect whether the second communication technology is active on the first channel by receiving a sequence unique to the second communication technology.
  • the technology management component 1408 may detect whether the second communication technology is active on the first channel by: identifying, on the first channel, one or more resources whose energy levels are greater than an energy threshold, determining that the second communication technology is detected on the first channel if a fraction based on an amount of decodable energy of the one or more resources on the first channel and an overall energy of the one or more resources is less than an fraction threshold, and determining that the second communication technology is not detected on the first channel if the fraction based on the amount of the decodable energy of the one or more resources on the first channel and the overall energy of the one or more resources is greater than the fraction threshold.
  • the determination may be based on configuration information provided to the UE, the configuration information including at least one of: priority levels of the first channel and second channel for the first communication technology, one or more geographical areas in which the first channel is allowed to be used, one or more geographical areas in which the second channel is allowed to be used, or an action to be performed upon detection of the second communication technology on each of the first and second channels.
  • the action may be based on a type of the second communication technology.
  • the configuration information may be based on at least one of pre-configuration within the UE or dynamic configuration via a received configuration message.
  • the pre-configuration may be performed via at least one of the UE or a UICC, and the dynamic configuration is performed based on at least one of RRC signaling from a base station, signaling from an ITS sever, or signaling from an operator-controlled server.
  • the technology management component 1408 receives, via the reception component 1404 at 1462 (e.g., from the second UE 1440 at 1456), one or more messages indicating that at least one another UE (e.g., second UE 1440) has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM.
  • the communication management component 1412 may relay the one or more messages to another UE via the transmission component 1406 at 1470.
  • the technology management component 1408 receives, via the reception component 1404 at 1462 (e.g., from the second UE 1440 at 1456), one or more messages indicating that at least one another UE (e.g., second UE 1440) has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM.
  • the communication management component 1412 may relay the one or more message via the transmission component 1406 at 1470 if a relay hop count is less than a relay hop count limit, where the one or more message indicates the relay hop count.
  • the communication management component 1412 refrains from relaying the one or more message if the relay hop count is greater than or equal to the relay hop count limit.
  • the communication management component 1412 utilizes the second channel with the first communication technology.
  • the communication management component 1412 performs, periodically, a checking session for availability of the first channel while utilizing the second channel with the first communication technology. If the first channel is available based on the checking session, the communication management component 1412 utilizes the first channel with the first communication technology.
  • each checking session may be periodically performed during a checking time duration.
  • the communication management component 1412 may perform the checking session by determining that the first channel is available if a number of consecutive checking sessions finding availability of the first channel exceeds a checking session threshold. In such an aspect, the communication management component 1412 may perform the checking session further by increasing the checking session threshold if the first channel determined to be available becomes unavailable within a predefined time period. In such an aspect, the communication management component 1412 may perform the checking session further by: if the UE is a multi-mode UE capable of utilizing the first communication technology and the second communication technology, refraining from utilizing the first communication technology and the second communication technology on the first channel during the checking time duration.
  • the communication sensing component 1416 may determine whether the first channel is occupied by short range wireless communication by sensing for short range wireless communication based on at least one of a preamble received in the first channel indicating presence of the short range wireless communication, or an energy level in the first channel exceeding a threshold.
  • the communication sensing component 1416 may determine whether the first channel is occupied by short range wireless communication by: determining whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, if the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, determining that the first channel is occupied by short range wireless communication, and if the short range wireless communication in the first channel is transmitted by a UE with cellular D2D capability and is not transmitted by a UE without cellular D2D capability, determining that the first channel is not occupied by short range wireless communication.
  • the communication sensing component 1416 determines whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability by determining whether a UE without cellular D2D capability transmits short range wireless communication in the first channel during a silence period, wherein no UE with cellular D2D capability is configured to perform short range wireless communication in the first channel during the silence period, where one or more UEs including the UE are configured to perform cellular D2D communication in the first channel if a UE without cellular D2D capability during a silence period does not transmit short range wireless communication in the first channel.
  • the cellular D2D communication is performed in the first channel based on at least one of a interference pattern, SPS characteristics, or SA decoding information carried from previous use of a previous channel.
  • the communication management component 1412 may perform short range wireless communication using the first channel, via the transmission component 1406 and the reception component 1404 (e.g., with another UE 1440 at 1470, 1458, 1456, and 1468).
  • the transmission component 1406 and the reception component 1404 may be configured to communicate with a base station 1430, at 1454 and 1452.
  • the communication management component 1412 determines availability of one or more remaining channels of the plurality of channels for cellular D2D communication, wherein the one or more remaining channels are different from the first channel. If none of the one or more remaining channels is available for cellular D2D communication, atl l l4, the communication management component 1412 refrains from performing cellular D2D communication.
  • the short range wireless communication is a DSRC. In an aspect, the short range wireless communication is based on IEEE 802. l ip. In an aspect, the priority level of each channel of the plurality of channels is indicated by a base station or is preconfigured in the UE.
  • the communication management component 1412 performs cellular D2D communication using the first channel, via the transmission component 1406 and the reception component 1404 (e.g., at 1470, 1458, 1456, and 1468).
  • FIG. 15 is a diagram 1500 illustrating an example of a hardware implementation for an apparatus 1402' employing a processing system 1514.
  • the processing system 1514 may be implemented with a bus architecture, represented generally by the bus 1524.
  • the bus 1524 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1514 and the overall design constraints.
  • the bus 1524 links together various circuits including one or more processors and/or hardware components, represented by the processor 1504, the components 1404, 1406, 1408, 1410, 1412, and the computer-readable medium / memory 1506.
  • the bus 1524 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • the processing system 1514 may be coupled to a transceiver 1510.
  • the transceiver 1510 is coupled to one or more antennas 1520.
  • the transceiver 1510 provides a means for communicating with various other apparatus over a transmission medium.
  • the transceiver 1510 receives a signal from the one or more antennas 1520, extracts information from the received signal, and provides the extracted information to the processing system 1514, specifically the reception component 1404.
  • the transceiver 1510 receives information from the processing system 1514, specifically the transmission component 1406, and based on the received information, generates a signal to be applied to the one or more antennas 1520.
  • the processing system 1514 includes a processor 1504 coupled to a computer-readable medium / memory 1506.
  • the processor 1504 is responsible for general processing, including the execution of software stored on the computer- readable medium / memory 1506.
  • the software when executed by the processor 1504, causes the processing system 1514 to perform the various functions described supra for any particular apparatus.
  • the computer-readable medium / memory 1506 may also be used for storing data that is manipulated by the processor 1504 when executing software.
  • the processing system 1514 further includes at least one of the components 1404, 1406, 1408, 1410, 1412.
  • the components may be software components running in the processor 1504, resident/stored in the computer readable medium / memory 1506, one or more hardware components coupled to the processor 1504, or some combination thereof.
  • the processing system 1514 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359.
  • the apparatus 1402/1402' for wireless communication includes means for detecting whether a second communication technology different from a first communication technology utilized by the UE is active on a first channel, and means for performing, based on the detection, an action associated with assigning the first communication technology to at least one of the first channel or a second channel.
  • the means for performing the action may be configured to: determine, based on the detection, whether to stay on a first channel with the first communication technology, or to vacate the first channel of the first communication technology, or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, wherein the action is performed based on the determination.
  • the apparatus 1402/1402' may further include means for transmitting a message to one or more other UEs if the UE determines to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, the message indicating the determination by the UE.
  • the means for detecting whether the second communication technology is active on the first channel is configured to: monitor for one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, wherein the detecting whether the second communication technology is active on the first channel is based on the one or more messages.
  • the means for detecting whether the second communication technology is active on the first channel is further configured to: if one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology are received, determine that the second communication technology is detected on the first channel, and if no message indicating that another UE has determined to vacate the first channel of the first communication technology is received, determine that the second communication technology is not detected on the first channel.
  • the apparatus 1402/1402' may further include means for receiving one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM; and means for relaying the one or more messages to another UE.
  • the apparatus 1402/1402' may further include means for receiving one or more messages indicating that at least one another UE has determined to vacate the first channel of the first communication technology or to stay on the first channel with the first communication technology and the second communication technology sharing the first channel via TDM, and means for relaying the one or more message if a relay hop count is less than a relay hop count limit, wherein the one or more message indicates the relay hop count; and means for refraining from relaying the one or more message if the relay hop count is greater than or equal to the relay hop count limit.
  • the means for performing the checking session is further configured to increase the checking session threshold if the first channel determined to be available becomes unavailable within a predefined time period.
  • the means for performing the checking session is configured to: if the UE is a multi-mode UE capable of utilizing the first communication technology and the second communication technology, refrain from utilizing the first communication technology and the second communication technology on the first channel during the checking time duration.
  • the means for detecting whether the second communication technology is active on the first channel is configured to receive a sequence indicating the second communication technology. In an aspect, the means for detecting whether the second communication technology is active on the first channel is configured to receive a sequence unique to the second communication technology.
  • the means for detecting whether the second communication technology is active on the first channel is configured to: identify, on the first channel, one or more resources whose energy levels are greater than an energy threshold, determine that the second communication technology is detected on the first channel if a fraction based on an amount of decodable energy of the one or more resources on the first channel and an overall energy of the one or more resources is less than an fraction threshold, and determine that the second communication technology is not detected on the first channel if the fraction based on the amount of the decodable energy of the one or more resources on the first channel and the overall energy of the one or more resources is greater than the fraction threshold.
  • the means for performing the cellular D2D communication is configured to perform the cellular D2D communication using a second channel with a highest priority level of the at least one of the one or more remaining channels that is available for the cellular D2D communication.
  • the apparatus 1402/1402' includes means for performing short range wireless communication using the first channel if the at least one of the one or more remaining channels is available for the cellular D2D communication and the UE is capable of short range wireless communication.
  • the apparatus 1402/1402' includes means for refraining from performing cellular D2D communication if none of the one or more remaining channels is available for cellular D2D communication. In an aspect, the apparatus 1402/1402' includes means for performing short range wireless communication using the first channel if the first channel is occupied by the short range wireless communication and the UE is capable of short range wireless communication. In an aspect, the apparatus 1402/1402' includes means for performing cellular D2D communication using the first channel if the first channel is not occupied by the short range wireless communication.
  • the apparatus 1402/1402' includes means for determining whether at least one of the one or more remaining channels is occupied by short range wireless communication, if the first channel is not occupied by the short range wireless communication, and means for performing short range wireless communication using the at least one of the one or more remaining channels, if at least one of the one or more remaining channels is occupied by short range wireless communication and the UE is capable of short range wireless communication.
  • the apparatus 1402/1402' includes means for the means for determining whether at least one of the one or more remaining channels is occupied by short range wireless communication is configured to determine whether at least one of the one or more remaining channels is occupied by short range wireless communication if the UE has short range wireless communication capability.
  • the apparatus 1402/1402' includes the means for determining whether the first channel is occupied by short range wireless communication is configured to sense for short range wireless communication based on at least one of a preamble received in the first channel indicating presence of the short range wireless communication, or an energy level in the first channel exceeding a threshold.
  • the apparatus 1402/1402' includes the means for determining whether the first channel is occupied by short range wireless communication is configured to: determine whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, if the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability, determine that the first channel is occupied by short range wireless communication, and if the short range wireless communication in the first channel is transmitted by a UE with cellular D2D capability and is not transmitted by a UE without cellular D2D capability, determine that the first channel is not occupied by short range wireless communication.
  • the apparatus 1402/1402' includes the means for determining whether the first channel is occupied by short range wireless communication that is configured to determine whether the short range wireless communication in the first channel is transmitted by a UE without cellular D2D capability is configured to: determine whether a UE without cellular D2D capability transmits short range wireless communication in the first channel during a silence period, wherein no UE with cellular D2D capability is configured to perform short range wireless communication in the first channel during the silence period, wherein one or more UEs including the UE are configured to perform cellular D2D communication in the first channel if a UE without cellular D2D capability during a silence period does not transmit short range wireless communication in the first channel.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 1402 and/or the processing system 1514 of the apparatus 1402' configured to perform the functions recited by the aforementioned means.
  • the processing system 1514 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359.
  • the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.

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

Abstract

La présente invention concerne une infrastructure permettant de gérer la coexistence de multiples technologies sur de multiples canaux. L'appareil peut être un équipement utilisateur (UE). L'UE détecte si une seconde technologie différente d'une première technologie de communication utilisée par l'UE est active sur un premier canal. L'UE réalise, sur la base de la détection, une action associée à l'attribution de la première technologie de communication à au moins un du premier canal ou d'un second canal.
PCT/US2017/041229 2016-07-08 2017-07-07 Coexistence de multiples technologies dans le spectre de service de transport intelligent non autorisé par licence WO2018009886A1 (fr)

Applications Claiming Priority (6)

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US201662359902P 2016-07-08 2016-07-08
US62/359,902 2016-07-08
US201662374685P 2016-08-12 2016-08-12
US62/374,685 2016-08-12
US15/465,877 2017-03-22
US15/465,877 US10477371B2 (en) 2016-07-08 2017-03-22 DSRC-LTE V2V co-channel long term coexistence

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Publication number Priority date Publication date Assignee Title
EP3582562A3 (fr) * 2018-06-14 2020-03-11 Clarion Co., Ltd. Dispositif de communication véhicule-véhicule, système de communication véhicule-véhicule et procédé de communication véhicule-véhicule
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