# US 2019/0174547 A1 · Intra- and inter-rat co-existence and congestion control for lte pc5-based vehicle-to-vehicle (v2v) communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174547 A1 - Document ID: US20190174547A1 - Status: Published application - Kind: A1 - Application number: 16/322,412 - Filed: 2017-09-27 - Published: 2019-06-06 - Earliest claimed: 2016-09-30 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Alexey Khoryaev; Mikhail Shilov; Andrey Chervyakov; Sergey Panteleev - Web page: https://patentgrep.com/patent/US20190174547A1 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04L 47/11: Identifying congestion - H04W 4/46: for vehicle-to-vehicle communication [V2V] - H04W 28/0284: {detecting congestion or overload during communication (monitoring arrangements H04L43/00)} - H04W 48/18: Selecting a network or a communication service - H04W 72/541: using the level of interference - H04W 74/0816: with collision avoidance - H04B 17/382: for resource allocation, admission control or handover - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 28/082: among bearers or channels - H04W 76/14: Direct-mode setup - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 92/18: between terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Systems and methods of providing RAT co-existence and congestion control in V2V communications are generally described. A vUE detects specific non-LTE RAT transmissions in a listening period of a PSCCH or PSSCH, determines whether a metric has been met and reselects to a non-overloaded channel to communicate with other vUEs or the eNB. The manner of reselection is dependent on the RAT specific or V2X service priorities of the channels, as well as whether the channels are V2V service dependent. ## Claims ### Claim 1 An apparatus of a vehicle user equipment (vUE), the apparatus comprising: an interface to send communications to and receive communications from at least one of an evolved NodeB (eNB) or another vUE; and processing circuitry in communication with the interface and arranged to: determine, in a channel of a sidelink subframe used in communication between vUEs, that a predetermined listening interval has been reached, the channel allocated to a long term evolution (LTE) vehicle-to-vehicle (V2V) radio access technology (RAT), the predetermined listening interval configured to be devoid of LTE radio frequency (RF) signals; detect at least one of a V2V or non-V2V signal in the channel during the predetermined listening interval; determine that a non-LTE RAT is in operation in the channel based on detection of the at least one of the V2V or non-V2V signal in the channel during the predetermined listening interval; and determine whether to one of drop packet transmission or select another channel for transmission, of multiple channels allocated to the LTE-V2V RAT and the non-LTE RAT, in response to a determination that the non-LTE RAT is in operation in the channel, the selection based on allocation priorities of the multiple channels for the LTE-V2V RAT and the non-LTE RAT and conducted measurements in a given channel. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein: the detection comprises detection of energy of the at least one of the V2V or non-V2V signal, and the predetermined listening interval is disposed in a last symbol of each of a plurality of contiguous sidelink subframes allocated for cellular V2V communication. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein: the last symbol is punctured and the predetermined listening interval is disposed within a punctured region of the last symbol. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein: the detection comprises detection of energy of the V2V signal, and the predetermined listening interval is disposed in V2V blank reserved resources disposed in preconfigured sidelink subframes. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein: the V2V signal is a LTE-V2V specific signal transmitted by other vUEs in a last symbol of at least one of a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH). ### Claim 6 (depends on 5) The apparatus of claim 5, wherein: the last symbol is punctured and the signal occupies a part of a last symbol duration. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein: the LTE-V2V RAT and the non-LTE RAT are allocated with equal priority. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein: a determination of whether to drop packet transmission in the given channel or select another channel for transmission is dependent on at least one of RAT-specific channel loading or overall channel loading of each of the multiple channels. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein: the determination of whether drop packet transmission in the given channel or select another channel for transmission, as well as which other channel to select, is dependent on RAT-specific channel loading, and the RAT-specific channel loading is determined by at least one of reference signal received power (RSRP) measurements over a physical sidelink control (PSCCH) or shared channel (PSSCH) demodulation reference signal (DMRS) and comparison with a pre-configured RSRP threshold, an amount of decoded sidelink control information (SCI) within a predefined time interval, or at least one of a number or ratio of resources detected as occupied by vUEs within the predefined time interval. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein: the determination of whether drop packet transmission in the given channel or select another channel for transmission, as well as which other channel to select, is dependent on overall channel loading, and the overall channel loading is determined by a sidelink received signal strength indicator (SL-RSSI) across at least one of an entire system bandwidth or frequency sub-channels configured for sidelink V2V communication, and comparison with pre-configured RSSI threshold. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the processing circuitry is further arranged to: select to a non-overloaded channel that has at least one of a highest LTE-V2V RAT priority or delivered V2V service specific priority among the multiple channels. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein: the LTE-V2V RAT and the non-LTE RAT are allocated with priorities dependent on a type of RAT or vehicle-to-everything (V2X) service type. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the processing circuitry is further arranged to: select to a non-overloaded channel that has a highest priority for a particular RAT or V2X service type among the multiple channels unless the selection causes the non-overloaded channel to be overloaded. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the processing circuitry is further arranged to: select to a non-overloaded channel, among the multiple channels, that is dependent on a vehicle-to-anything (V2X) or V2V service provided by the LTE-V2V RAT. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein: the non-overloaded channel is a less congested channel when a plurality of the channels have equal priority for the V2X or V2V service. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the reselection further comprises: the non-overloaded channel is a channel in which the V2X or V2V service is dominant independent of channel congestion unless the selection causes the non-overloaded channel to be overloaded. ### Claim 17 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further arranged to: select to a non-overloaded channel and control at least one congestion control transmission parameter for sidelink V2V transmissions, the at least one metric comprising at least one of a maximum number of transmission time intervals (TTIs) used per transport block (TB), a maximum number of sub-channels able to be used per TB transmission, a range of effective code rates per TB transmission, or a minimum inter-TB transmission interval. ### Claim 18 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further arranged to: select to a non-overloaded channel dependent on total received power measurements on sidelink resources. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the processing circuitry is further arranged to: measure the total received power measurements on sidelink resources comprises one of physical sidelink shared channel (PSSCH) resources free from a measurement on physical sidelink control channel (PSCCH) resources or both PSSCH and PSCCH resources. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein: a measurement of the total received power measurements on the PSSCH resources occurs over preconfigured subsets of available PSSCH resources. ### Claim 21 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry comprises a baseband processor configured to encode transmissions to, and decode transmissions from, the eNB or other vUE. ### Claim 22 An apparatus of an evolved NodeB (eNB), the apparatus comprising: an interface to an interface to send communications to and receive communications from a vehicle user equipment (vUE); and processing circuitry in communication with the interface and arranged to: encode, for transmission to the vUE, an indication of a predetermined listening interval, the listening interval disposed in at least one of a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) and devoid of long term evolution (LTE) radio frequency (RF) signals between the vUE and the eNB; allocate multiple channels to a LTE vehicle-to-vehicle (V2V) radio access technology (RAT), the multiple channels simultaneously allocated to a non-LTE RAT; and encode, for transmission to the vUE, an indication at least one metric for measurement of sidelink V2V transmissions for one of dropping by the vUE of packet transmission or selection by the vUE from one of the multiple channels to another of the multiple channels in response to the metric being reached. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein: the predetermined listening interval is disposed in a last symbol of each sidelink subframe, during which a LTE-V2V specific signal transmitted by other vUEs occupies a punctured part of a last symbol duration. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein: the LTE-V2V RAT and the non-LTE RAT are allocated with equal priority, the processing circuitry is further arranged to encode for transmission to the vUE an indication of whether to select dependent on at least one of RAT-specific channel loading or overall channel loading of each of the multiple channels, selection dependent on RAT-specific channel loading is determined by at least one of reference signal received power (RSRP) measurements over a PSSCH demodulation reference signal (DMRS) and comparison with pre-configured RSRP threshold, an amount of decoded sidelink control information (SCI) within a predefined time interval, or a number of resources occupied by vUEs within the predefined time interval, and selection dependent on overall channel loading is determined by a sidelink received signal strength indicator (SL-RSSI) across one of an entire system bandwidth or pre-configured sub-channel and comparison with pre-configured RSSI threshold. ### Claim 25 (depends on 22) The apparatus of claim 22, wherein: the LTE-V2V RAT and the non-LTE RAT are allocated with priorities dependent on a type of RAT, and the processing circuitry is further arranged to encode for transmission to the vUE an indication to select to a non-overloaded channel that has a highest priority for a particular RAT among the multiple channels or that is dependent on a vehicle-to-anything (V2X) or V2V service provided by the LTE-V2V RAT. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein: the at least one metric is a congestion control transmission parameter that comprises at least one of a maximum number of transmission time intervals (TTIs) used per transport block (TB), a maximum number of sub-channels that used per TB transmission, a range of effective code rates per TB transmission, or a minimum inter-TB transmission interval. ### Claim 27 (depends on 22) The apparatus of claim 22, wherein: the processing circuitry is further arranged to encode for transmission to the vUE an indication to select to a non-overloaded channel dependent on total received power measurements on PSSCH resources free from a measurement on PSCCH resources. ### Claim 28 A computer-readable storage medium that stores instructions for execution by one or more processors of a vehicle user equipment (vUE), the one or more processors to configure the vUE to: detect, in a channel allocated to a long term evolution (LTE) vehicle-to-vehicle (V2V) radio access technology (RAT) and to a non-LTE RAT, non-LTE RF signals in a punctured region of a last symbol of a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) that is configured by the eNB to be devoid of LTE radio frequency (RF) signals; and select to a non-overloaded channel to communicate with at least one of another vUE or the eNB dependent on at least one metric for sidelink V2V transmissions. ### Claim 29 (depends on 28) The medium of claim 28, wherein: the LTE-V2V RAT and the non-LTE RAT are allocated with equal priority among multiple channels, whether to drop transmission or which non-overloaded channel to select is dependent on at least one of RAT-specific channel loading or overall channel loading of each of the multiple channels, whether to drop transmission or which non-overloaded channel to select is dependent on RAT-specific channel loading is determined by at least one of reference signal received power (RSRP) measurements over a PSCCH or PSSCH demodulation reference signal (DMRS), an amount of decoded sidelink control information (SCI) within a predefined time interval, or a number of resources occupied by vUEs within the predefined time interval, and selection dependent on overall channel loading is determined by a sidelink received signal strength indicator (SL-RSSI) across one of an entire system bandwidth or within pre-configured sub-channels. ### Claim 30 (depends on 28) The medium of claim 28, wherein at least one of: the LTE-V2V RAT and the non-LTE RAT are allocated with priorities dependent on a type of RAT, the at least one metric is a congestion control parameter that comprises at least one of a maximum number of transmission time intervals (TTIs) used per transport block (TB), a maximum number of sub-channels that used per TB transmission, a range of effective code rates per TB transmission, or a minimum inter-TB transmission interval, selection is to a non-overloaded channel that has a highest priority for a particular RAT among the multiple channels or that is dependent on a vehicle-to-anything (V2X) or V2V service provided by the LTE-V2V RAT, or selection is to a non-overloaded channel that is dependent on total received power measurements on sidelink resources or PSSCH resources free from a measurement on PSCCH resources.