# US 2019/0356451 A1 · A method and device for vehicle to everything (v2x) communications and a transmitting and receiving method and equipment in v2x communication

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- Number: US 2019/0356451 A1
- Document ID: US20190356451A1
- Status: Published application
- Kind: A1
- Application number: 16/479,357
- Filed: 2018-01-19
- Published: 2019-11-21
- Earliest claimed: 2017-01-20
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Shichang ZHANG; Yingyang LI; Yi WANG
- Web page: https://patentgrep.com/patent/US20190356451A1

## CPC

- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 48/16: Discovering, processing access restriction or access information
- H04B 17/327: Received signal code power [RSCP]
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation}
- H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority}
- H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information}
- H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 52/325: {Power control of control or pilot channels}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/383: {power control in peer-to-peer links}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 52/146: {Uplink power control}
- H04W 52/281: {taking into account user or data type priority}
- H04W 52/343: {taking into account loading or congestion level}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method and device for vehicle to everything (V2X) communications. The method comprises: receiving configuration signaling transmitted by an eNB, and then determining, according to the configuration signaling, at least one of a search space corresponding to S-DCI_C, a transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C; or determining, according to the configuration signaling, at least one optional time position information for transmitting a Side Link Synchronization Signal (SLSS) and a Physical Sidelink Broadcast CHannel (PSBCH), and then, based on coverage state about whether a first UE is within cellular network coverage, according to the type of a reference synchronization source, determining 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 application also provides a transmitting and receiving method in V2X communication, comprising the steps of: detecting, by a first-type UE, a PSCCH in format of SCI X transmitted by other UEs, and determining, according to the SCI X, whether to further measure PSSCH-RSRP of a PSSCH scheduled by the SCI X and whether to further decode the PSSCH scheduled by the SCI X. The method provided by the present application further comprises the steps of: detecting, by a second-type UE, a PSCCH in format of SCI X transmitted by other UEs, and determining, according to a modulation and coding bit field in the SCI X and a predefined TBS mapping rule, a TBS of a PSSCH scheduled by the SCI X. The method provided by the present application further comprises the step of: determining, by the second-type UE and according to a modulation scheme, the transmitting power of the PSCCH of the SCI X and the transmitting power of the PSSCH scheduled by the SCI X. By the above method, the coexistence of a first-type V2X UE and a second-type V2X UE can be better realized, and the transmission efficiency of the second-type V2X UE can be improved.

## Claims

### Claim 1

A method for vehicle to everything (V2X) communications by a terminal, comprising:
receiving configuration signaling from a base station, the configuration signaling including information on 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 nCI_m corresponding to the carrier C, wherein the Mode 3 includes a V2X resource allocation mode based on scheduling of the base station;
determining, based on 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; and
monitoring the S-DCI_C based on the 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.

### Claim 2 (depends on 1)

The method of claim 1, wherein the determining the search space corresponding to the S-DCI_C comprises:
determining, based on at least one of nc and nCI_m, at least one PDCCH that may contain the SDCI_C and control channel elements (CCEs) of each PDCCH, or at least one EPDCCH that may contain the SDCI_C, and enhanced control channel elements (ECCEs) of each EPDCCH.

### Claim 3 (depends on 1)

The method of claim 1, wherein the determining the transmission carrier of the S-DCI_C comprises:
determining that the transmission carrier SC of the S-DCI_C is the same as the transmission carrier of the configuration signaling.

### Claim 4 (depends on 1)

The method of claim 1, wherein the determining the number of bits corresponding to the S-DCI_C comprises:
determining the number of bits of the S-DCI_C as specific value based on the number of subchannels of the carrier C and the bandwidth of the transmission carrier of the S-DCI_C.

### Claim 5 (depends on 2)

The method of claim 2, wherein the at least one PDCCH that may contain the SDCI_C, and CCEs of each PDCCH are determined based on current time 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 the S-DCI_C, a radio network temporary identity (RNTI) configured for the terminal, aggregation level of PDCCHs carrying the S-DCI_C, and nc and
wherein the at least one EPDCCH that may contain the SDCI_C, and ECCEs of each EPDCCH are determined based on current time slot number, the number of EPDCCHs containing the S-DCI_C, a RNTI configured for the terminal, aggregation level of EPDCCHs carrying the S-DCI_C, and the nc.

### Claim 6 (depends on 2)

The method of claim 2, wherein the at least one PDCCH that may contain the SDCI_C, and CCEs of each PDCCH are determined based on current time slot number, the number of CCEs for PDCCH transmission in each subframe where PDCCH containing S-DCI_C may reside, a RNTI configured for the UE, aggregation level of PDCCHs carrying the S-DCI_C, and nCI_m, and
wherein the at least one EPDCCH that may contain the SDCI_C, and ECCEs of each EPDCCH are determined based on current time slot number, the number of EPDCCHs containing the S-DCI_C, a RNTI configured for the terminal, aggregation level of EPDCCHs carrying the S-DCI_C, and the nCI_m.

### Claim 7 (depends on 2)

The method of claim 2, wherein the at least one PDCCH that may contain the SDCI_C, and CCEs of each PDCCH are determined based on current time 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 the S-DCI_C, a RNTI configured for the terminal, aggregation level of PDCCHs carrying the S-DCI_C, nc and nCI_m, and
wherein the at least one EPDCCH that may contain the SDCI_C, and ECCEs of each EPDCCH are determined based on current time slot number, the number of EPDCCHs containing the S-DCI_C, a RNTI configured for the terminal, aggregation level of EPDCCHs carrying the S-DCI_C, nc and the nCI_m.

### Claim 8 (depends on 1)

The method of claim 1, if the S-DCI_C scrambled by side link Semi-Persistent Scheduling (SPS) RNTI is detected based on the monitoring, and the number of subchannels of the resource pool, for current terminal Mode 3 operation, on the carrier C is 20 and the transmission carrier SC of the S-DCI_C is a frequency division duplex (FDD) carrier with a bandwidth of 1.4 MHz, further comprising:
determining that the number of bits of the SPS configuration index field in the S-DCI_C is 2 bits.

### Claim 9

A terminal for vehicle to everything (V2X) communications, comprising:
a transceiver configured to receive configuration signaling from a base station, the configuration signaling comprising at least one of an index corresponding to a carrier C configured with Mode 3 resource pool, a transmission carrier SC for transmission of downlink control information S-DCI_C used for scheduling of sidelink transmission on the carrier C, and maximum index value nCI_m corresponding to the carrier C; and
a controller configured to determine, based on 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 and monitor the S-DCI_C based on 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.

### Claim 10 (depends on 9)

The terminal of claim 9, wherein the controller configured to determine, based on at least one of nc and nCI_m, at least one PDCCH that may contain the SDCI_C and control channel elements (CCEs) of each PDCCH, or at least one EPDCCH that may contain the SDCI_C and enhanced control channel elements (ECCEs) of each EPDCCH, as the search space corresponding to the S-DCI_C.

### Claim 11 (depends on 9)

The terminal of claim 9, wherein the controller configured to determine that the transmission carrier of the S-DCI_C is the same as the transmission carrier of the configuration signaling.

### Claim 12 (depends on 9)

The terminal of claim 9, wherein the controller configured to determine the number of bits corresponding to the S-DCI_C as specific value based on the number of subchannels of the carrier C and the bandwidth of the transmission carrier of the S-DCI_C.

### Claim 13 (depends on 10)

The terminal of claim 10,
wherein the at least one PDCCH that may contain the SDCI_C and CCEs of each PDCCH are determined based on current time 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 the S-DCI_C, a radio network temporary identity (RNTI) configured for the terminal, aggregation level of PDCCHs carrying the S-DCI_C, and nc and
wherein the at least one EPDCCH that may contain the SDCI_C, and ECCEs of each EPDCCH are determined based on current time slot number, the number of EPDCCHs containing the S-DCI_C, a RNTI configured for the terminal, aggregation level of EPDCCHs carrying the S-DCI_C, and the nc.

### Claim 14 (depends on 10)

The terminal of claim 10,
wherein the at least one PDCCH that may contain the SDCI_C and CCEs of each PDCCH are determined based on current time slot number, the number of CCEs for PDCCH transmission in each subframe where PDCCH containing S-DCI_C may reside, a RNTI configured for the terminal, aggregation level of PDCCHs carrying the S-DCI_C, and nCI_m, and
wherein the at least one EPDCCH that may contain the SDCI_C, and ECCEs of each EPDCCH are determined based on current time slot number, the number of EPDCCHs containing the S-DCI_C, a RNTI configured for the terminal, aggregation level of EPDCCHs carrying the S-DCI_C, and the nCI_m.

### Claim 15 (depends on 9)

The terminal of claim 9, if the S-DCI_C scrambled by side link Semi-Persistent Scheduling (SPS) RNTI is detected based on the monitoring, and the number of subchannels of the resource pool, for current terminal Mode 3 operation, on the carrier C is 20 and the transmission carrier SC of the S-DCI_C is a frequency division duplex (FDD) carrier with a bandwidth of 1.4 MHz,
wherein the controller configured to determine that the number of bits of the SPS configuration index field in the S-DCI_C is 2 bits.