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WO2021031090A1 - Procédé et dispositif de communication de liaison latérale - Google Patents

Procédé et dispositif de communication de liaison latérale Download PDF

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Publication number
WO2021031090A1
WO2021031090A1 PCT/CN2019/101453 CN2019101453W WO2021031090A1 WO 2021031090 A1 WO2021031090 A1 WO 2021031090A1 CN 2019101453 W CN2019101453 W CN 2019101453W WO 2021031090 A1 WO2021031090 A1 WO 2021031090A1
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WO
WIPO (PCT)
Prior art keywords
information
dmrs
time domain
domain resource
terminal device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/101453
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English (en)
Chinese (zh)
Inventor
王婷
唐浩
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2019/101453 priority Critical patent/WO2021031090A1/fr
Priority to CN201980098502.3A priority patent/CN114128197B/zh
Publication of WO2021031090A1 publication Critical patent/WO2021031090A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • the first time domain resource is also used to carry uplink information. That is, the first time domain resource may carry the first side link information and the uplink information, and the second time domain resource may carry the second side link information.
  • the first side uplink information includes side uplink control information and first side uplink data information
  • the second side uplink information includes the first side uplink information.
  • Two-side uplink data information the first DMRS is used to demodulate the side uplink control information and/or the first side uplink data information
  • the second DMRS is used to demodulate the second side uplink data information.
  • the side link data information on the first time domain resource where the side link control information and the side link data information are multiplexed, and the second time domain that is not multiplexed with the side link control information can also be received and demodulated using different DMRS, which can avoid the power amplification of the side link control channel, which leads to the upper side of the first time domain resource and the second time domain resource
  • the transmission power of the uplink data information is different, which in turn affects the problem of correct reception of the side uplink data information.
  • the second terminal device can receive the first DMRS and the second DMRS sent by the first terminal device in the same time unit, and demodulate the first side of the first time domain resource according to the first DMRS Uplink information, demodulate the second sidelink information in the second time domain resource according to the second DMRS, so that the sidelink information in the two time domain resources that do not overlap in the time domain can be different DMRS receive demodulation, thereby improving the transmission performance on the side link.
  • the side link control information is used to schedule the transmission of the first side link data information and the transmission of the second side link data information.
  • the side link data information scheduled by the same side link control information and located on non-overlapping time domain resources can be received and demodulated using different DMRS.
  • the side-link data information on different time-domain resources in the same time unit can be received and demodulated using different DMRSs.
  • the reliability of the transmission of the side-link data information can be improved. Avoid the power amplification of the side-link control information due to the parallel transmission of the uplink information or the frequency division multiplexing of the side-link control information and the side-link data information, which affects the correctness of the side-link data information Receiving problems.
  • the second terminal device may also receive first indication information, where the first indication information is used to indicate the first time domain resource and/or the second time domain resource .
  • the second terminal device may also receive second indication information, which is used to indicate the location of the first DMRS and/or the location of the second DMRS .
  • the structure of the device includes a processor and may also include a memory.
  • the processor is coupled with the memory, and can be used to execute computer program instructions stored in the memory, so that the device executes the above-mentioned first aspect or any one of the possible design methods of the first aspect, or executes the above-mentioned second aspect or the second aspect. Any one of the possible design methods.
  • the device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or an instruction is executed by the processor , So that the chip system implements the method in any possible design of the first aspect or the first aspect, or implements the method in any possible design of the second aspect or the second aspect.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • an embodiment of the present application provides a storage medium on which a computer program or instruction is stored.
  • the computer can execute any of the above-mentioned first aspect or any one of the first aspects.
  • the embodiments of the present application provide a computer program product.
  • the computer reads and executes the computer program product, the computer executes the method in the first aspect or any one of the possible designs in the first aspect, Or implement the above-mentioned second aspect or any one of the possible design methods of the second aspect.
  • FIG. 2 is a schematic flowchart of a side link communication method provided by an embodiment of this application.
  • Figure 3 is a schematic diagram of a time unit provided by an embodiment of the application.
  • 7a to 7c are schematic diagrams of uplink information, side-link control information, and side-link data information in scenario one provided by an embodiment of the application;
  • FIG. 9 is a schematic diagram of a start symbol or an end symbol that allows parallel transmission of uplink information and side link information in a time unit provided by an embodiment of the application;
  • FIG. 11 is a schematic diagram of determining the location of the first DMRS and/or the location of the second DMRS according to the first time domain resource and the second time domain resource according to an embodiment of this application;
  • FIG. 13 is a schematic diagram of sending side uplink information in scenario 2 provided by an embodiment of the application.
  • FIG. 14 is a schematic diagram of the first time domain resource and the second time domain resource in scenario 2 provided by an embodiment of this application;
  • 15a and 15b are schematic diagrams of the first DMRS and the second DMRS in the second scenario provided by an embodiment of the application;
  • FIG. 18 is a schematic flowchart of yet another side link communication method provided by an embodiment of this application.
  • the technical solutions provided by the embodiments of the present application can be applied to cellular links, and can also be applied to links between devices, such as device-to-device (D2D) links.
  • D2D links or vehicle-to-everything (V2X) links may also be called side links, auxiliary links, side links, side links, or side links.
  • the aforementioned terms may all refer to links between devices of the same type.
  • the so-called link between devices of the same type can be a link between a terminal device and a terminal device, a link between a base station and a base station, or a link between a relay node and a relay node. Road, etc., this embodiment of the application does not limit this.
  • the link between the terminal device and the terminal device can be a D2D link, or a V2X link from a car to a car, a car to a mobile phone, or a car to any entity.
  • the terminal device in the embodiment of the present application is not limited to this, and the terminal device may also be a vehicle-mounted module, a roadside unit or a pedestrian handheld device . It should be understood that the embodiments of the present application are not limited to 4G or 5G systems, and are also applicable to subsequent evolved communication systems.
  • Terminal equipment which may also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • the terminal device may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device may be a handheld device with a wireless connection function, a vehicle-mounted device, a vehicle user device, and so on.
  • Network equipment which can be a node in a radio access network, can also be referred to as a base station, or can also be referred to as a radio access network (RAN) node (or device).
  • the network equipment may include an evolved base station (eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-advanced, LTE-A), such as traditional
  • LTE long term evolution
  • LTE-A evolved LTE system
  • the macro base station eNB and the micro base station eNB in the heterogeneous network scenario may also include the next generation node B (next generation) in the fifth generation mobile communication technology (5G) system or the new radio (NR) system.
  • 5G fifth generation mobile communication technology
  • NR new radio
  • node B node B, gNB
  • TRP transmission reception point
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit BBU
  • BBU baseband pool BBU pool
  • wireless fidelity wireless fidelity, WiFi
  • AP access point
  • CU centralized unit
  • DU distributed unit
  • the network device may be a roadside unit (RSU) in V2X
  • RSU roadside unit
  • the RSU may be a device that supports V2X applications, and can exchange messages with other devices that support V2X applications.
  • “Multiple” refers to two or more. In view of this, “multiple” may also be understood as “at least two” in the embodiments of the present application. "At least one” can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • the method includes the following steps S201 to S204:
  • Step S201 The first terminal device generates a first demodulation reference signal (demodulation reference signal, DMRS), and sends the first DMRS, where the first DMRS is used to demodulate the first side link in the first time domain resource information.
  • Step S202 The first terminal device generates a second DMRS, and sends the second DMRS, where the second DMRS is used to demodulate the second side uplink information in the second time domain resource.
  • DMRS demodulation reference signal
  • the first time domain resource and the second time domain resource do not overlap in time.
  • the first time domain resource and the second time domain resource may be time domain resources in the same time unit.
  • the time unit may include one or more symbols in the time domain.
  • the side link information in the embodiment of the present application may include one or more of side link control information, side link data information, or side link feedback information, where the side link control information may It is carried on the physical sidelink control channel (PSCCH), and the sidelink data information can be carried on the physical sidelink shared channel (PSSCH).
  • the sidelink The control information may also be referred to as scheduling assignment (scheduling assignment, SA), and the side link data information may also be referred to as data (data) for short.
  • Sidelink feedback information can be carried on the sidelink feedback channel (physical sidelink feedback channel, PSFCH), and the sidelink feedback information can include acknowledgement (acknowledge, ACK)/negative acknowledgement (NACK) , And/or, one or more items of information such as channel state information (CSI).
  • CSI channel state information
  • the first terminal device has a constant transmission power for sending side-link information on symbols transmitted by side-link information in a time slot, and the uplink information and side-link information share the same Power amplifier (power amplifier, PA).
  • PA Power amplifier
  • the uplink information and the side link information may share a power amplifier on the same carrier, or may share a power amplifier on different carriers, and this application is not limited.
  • the uplink information and the side link information sharing the same power amplifier can also be understood as the uplink information and the side link information sharing the same transmission channel or transmission link, or using the same radio frequency unit for transmission.
  • the total transmit power of the first terminal device will change from P1 to P1+P2, that is, the first The total transmit power of the terminal device has jumped.
  • a jump in the total transmit power of the first terminal device will cause the phase of the side link information in the first time domain resource to be different from the phase in the second time domain resource, which will affect the second terminal device’s opposite side link Correct reception of information.
  • Fig. 8a exemplarily shows the first DMRS and the second DMRS in scenario 1 of the embodiment of the present application, where the first DMRS is located in the first time domain resource, and the second DMRS is located in the second time domain resource.
  • the first DMRS may be used to demodulate the side link information in the first time domain resource
  • the second DMRS may be used to demodulate the side link information in the second time domain resource.
  • Fig. 8c exemplarily shows the first DMRS and the second DMRS in scenario 1 of the embodiment of the present application, where the first DMRS is located in the first time domain resource, and the second DMRS is located in the second time domain resource.
  • the first DMRS can be used to demodulate side link control information and side link data information in the first time domain resource
  • the second DMRS can be used to demodulate side link data in the second time domain resource.
  • the first DMRS may be a DMRS corresponding to the PSCCH in the first time domain resource
  • the second DMRS is a DMRS corresponding to the PSSCH in the second time domain resource.
  • the ratio of the transmission power of the first DMRS to the transmission power of the side link data information in the first time domain resource may be 0 dB
  • the transmission power of the second DMRS is relative to the transmission power of the side link data information in the second time domain resource.
  • the ratio of the transmission power can be 0dB.
  • the side link The control information is used to schedule the transmission of the first side uplink data information and the transmission of the second side uplink data information.
  • the side link control information Used to schedule the transmission of the first side uplink data information and the transmission of the second side uplink data information.
  • the first time domain resource and/or the second time domain resource in the time unit can also be predefined, that is, it can be pre-defined that uplinks are allowed in certain symbol positions of a time unit Parallel transmission of information and side-link information, and/or, parallel transmission of uplink information and side-link information is not allowed in certain symbol positions in a time unit.
  • certain symbol positions of a time unit can be pre-defined to allow the start (or end) of the parallel transmission of uplink information and side link information or power hopping, and/or which of the time units are allowed At the symbol position, it is not allowed to start (or end) the parallel transmission of uplink information and side link information or to allow power hopping.
  • pre-defined mentioned in the embodiments of the present application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing or pre-burning, which will not be described in detail below.
  • the time unit is a time slot, and the time slot includes 14 symbols.
  • the symbols that allow the start (or end) of uplink information and side link information to be sent in parallel may be the symbols in the time slot.
  • the third symbol may also be the fifth symbol in the time slot, or the eighth symbol in the time slot, or the eleventh symbol in the time slot.
  • time domain resource that allows the start (or end) of the uplink information and the side link information to be sent in parallel is a single symbol in the time slot, but the uplink information is allowed to exist in a time slot.
  • the time domain resources that the link information and the side link information are sent in parallel may also include multiple symbols in the time slot, and the multiple symbols may be continuous or discontinuous, which is not limited by this application.
  • the second time domain resource may be a symbol used for sidelink information transmission before the beginning symbol, or the second time domain resource may be a symbol used for sidelink information transmission after the end symbol.
  • the second time domain resource may include a start symbol or an end symbol.
  • the first time domain resource and/or the second time domain resource can be indicated by 1 bit; if the first time domain resource and / Or the second time domain resource has 4 candidate resource positions, the first time domain resource and/or the second time domain resource can be indicated by 2 bits; if the first time domain resource and/or the second time domain resource has 8 If there are two candidate resource positions, the first time domain resource and/or the second time domain resource can be indicated by 3 bits.
  • the first time domain resource may refer to a time domain resource used for sidelink information transmission except for the second time domain resource in a time unit.
  • the second time domain resource may refer to a time domain resource used for sidelink information transmission except the first time domain resource in a time unit.
  • the second indication information may indicate the location of the first DMRS, and the location of the second DMRS is determined according to a predefined or second time domain resource, or may also be determined in other ways.
  • the second indication information may also indicate the location of the second DMRS, and the location of the first DMRS is determined according to a predefined or second time domain resource, or may also be determined in other ways.
  • the first terminal device may send instruction information to the second terminal device, where the instruction information is used to indicate the DMRS location and the pattern information of the time domain resource.
  • the terminal device can determine the positions of the first DMRS and the second DMRS.
  • the terminal device can determine the first time domain resource and the second time domain resource.
  • the indication information may be sent through the SCI, that is, the side link control information sent by the first terminal device to the second terminal device may include the indication information.
  • the network device may send the indication information to the first terminal device, for example, it may be sent through physical layer information (such as DCI) or high-layer signaling. That is, the instruction information may also be received by the first terminal device from the network device through DCI, and then sent to the second terminal device through SCI.
  • the predefined patterns can have one or more of the following:
  • the pattern in Figure 12a is a pattern corresponding to a time slot.
  • the pattern includes a first time domain resource and a second time domain resource for transmitting side link information.
  • the pattern in Figure 12b is a pattern corresponding to one or more symbols.
  • the time domain resource used for transmitting the side link information in the time unit may include one or more patterns.
  • the first time domain resource corresponds to a pattern
  • the second time domain resource corresponds to a pattern
  • the patterns corresponding to the first time domain resource and the second time domain resource may be the same or different.
  • the indication information may indicate that one or more patterns are time domain resources of side link information. For example, it is indicated as pattern 1 and pattern 2 in FIG. 12b, or pattern 1 and pattern 6, or pattern 4, or pattern 8 as the time domain resource of side link information. If two patterns are indicated, it can be indicated that the first pattern is the pattern corresponding to the first time domain resource, and the second pattern is the pattern corresponding to the second time domain resource. According to the indicated pattern, the terminal device can determine the first time domain resource, the first DMRS, the second time domain resource, and the second DMRS.
  • the side link control information and the side link data information in the side link information in the second scenario are multiplexed in option 3.
  • the first time domain resource is used to carry side link control information and the first side link data information
  • the second time domain resource is used to carry the second side link data information.
  • the link control information is used to schedule the transmission of the first side uplink data information and the transmission of the second side uplink data information.
  • the first terminal device may send side link information to the second terminal device.
  • the side link information includes side link control information and side link data information, and the side link control information and side link data information are multiplexed using option 3 shown in FIG. 6.
  • FIG. 14 exemplarily shows the first time domain resource and the second time domain resource in this scenario.
  • the first time domain resource contains side link control information and side link data information multiplexed in a frequency division manner.
  • the first time domain resource specifically refers to the time domain resource where the side link data information is multiplexed with the side link control information
  • the second time domain resource specifically refers to the side link data information that is not related to the side link control information.
  • Time domain resources for control information reuse refers to the side uplink data information in the first time domain resource
  • the second side uplink data information refers to the side uplink data information in the second time domain resource.
  • the multiplexing mode of side link control information and side link data information can be understood from the perspective of frequency domain, which can also be understood as the existence of side link control multiplexed in frequency division on some time domain resources.
  • this scenario does not consider whether there is parallel transmission of uplink information and side-link information in a time unit, and there may be parallel transmission of uplink information and side-link information in this time unit. There may be no parallel transmission of uplink information and side link information, which is not limited in this application.
  • the first terminal device may perform power amplification on the PSCCH when transmitting the side link information.
  • the transmission power of the PSCCH may be 3 dB higher than the transmission power of the PSSCH.
  • the first terminal device keeps the transmission power of the side link information constant, but at the same time amplifies the power of the side link control information, the side link data information transmitted on the first time domain resource will be caused
  • the transmit power of is different from the transmit power of the side link data information transmitted on the second time domain resource, and the transmit power of the side link data information on the resource block in the first time domain resource will be less than that of the second time domain resource
  • the transmit power of the side link data information on the resource block is the same as that in the first time domain resource.
  • the ratio of the transmission power of the side link data information is different from the ratio of the transmission power of the DMRS to the transmission power of the side link data information in the second time domain resource. Therefore, it may cause the first time domain resource or The side link data information in the second time domain resource is received incorrectly.
  • the first terminal device may send two DMRSs to the second terminal device, and the second terminal device demodulates the first DMRS according to the first DMRS.
  • the side link control information and/or the first side link data information in the time domain resource are demodulated according to the second DMRS to the second side link data information in the second time domain resource.
  • Figures 15a and 15b exemplarily show the first DMRS and the second DMRS in the second scenario of an embodiment of the present application, where the first DMRS is located in the first time domain resource, and the second DMRS is located in the second time domain resource.
  • the first DMRS is a DMRS of PSCCH
  • the second DMRS is a DMRS of PSSCH.
  • the first DMRS is used for the demodulation of side link control information and the first side link data information in the first time domain resource
  • the second DMRS is used for the second time domain resource in the second time domain.
  • Demodulation of side link data information For example, in FIG. 15a, the first DMRS is used to demodulate the side link control information and the first side link data information in the first time domain resource.
  • the frequency domain resources occupied by the first DMRS are the same as the frequency domain resources occupied by the side link control information, and the transmission power of the first DMRS and the side link control information is also the same, that is, the ratio of the transmission power is 0dB, so the first DMRS can be understood as the DMRS of PSCCH, that is, the DMRS used to decode PSCCH.
  • the ratio of the transmission power of the first DMRS to the transmission power of the first side uplink data information is 3 dB
  • the second terminal device is based on the first DMRS and the transmission power of the first DMRS and the first side uplink data information.
  • the ratio of the transmission power can also demodulate the first side uplink data information.
  • the second DMRS is used to demodulate the second side link data information in the second time domain resource.
  • the frequency domain resources occupied by the second DMRS are the same as the frequency domain resources occupied by the second side uplink data information, and the transmission power of the second DMRS and the second side uplink data information is also the same, that is, the ratio of the transmission power is 0dB Therefore, the second DMRS can be understood as the DMRS of the PSSCH, that is, the DMRS used to decode the PSSCH.
  • the first DMRS is the DMRS of the PSSCH
  • the second DMRS is the DMRS of the PSSCH.
  • the first DMRS is used for demodulation of the first side uplink data information in the first time domain resource
  • the second DMRS is used for the demodulation of the second side uplink data information in the second time domain resource. demodulation.
  • the first DMRS is used to demodulate the first side uplink data information in the first time domain resource.
  • the frequency domain resources occupied by the first DMRS are the same as the frequency occupied by the first side uplink data information.
  • the domain resources are the same, and the transmission power of the first DMRS is the same as the transmission power of the first side uplink data information, and the ratio of the transmission power is 0 dB.
  • the second DMRS is used to demodulate the second side uplink data information in the second time domain resource.
  • the frequency domain resources occupied by the second DMRS are the same as the frequency domain resources occupied by the second side uplink data information.
  • the transmission power of the second DMRS is the same as the transmission power of the second side uplink data information, and the ratio of the transmission power is 0 dB.
  • the first DMRS and the second DMRS are both PSSCH DMRS.
  • the first terminal device may further send the DMRS of the PSCCH for demodulation of the side link control information.
  • the positions of the first DMRS and the second DMRS are not specifically limited.
  • the first terminal device may send the second indication information to the second terminal device for indicating the location of the first DMRS and/or the location of the second DMRS.
  • the second indication information may be sent through the SCI, that is, the side link control information sent by the first terminal device to the second terminal device may include the second indication information.
  • the network device may send the second indication information to the first terminal device, for example, it may be sent through physical layer information (such as DCI) or high-layer signaling. That is, the second indication information may also be received by the first terminal device from the network device through DCI, and then sent to the second terminal device through SCI.
  • the location of the first DMRS and/or the location of the second DMRS may also be predefined in the system.
  • the time unit is a slot
  • the first DMRS is predefined as the 3rd symbol or the 4th symbol in the slot
  • the second DMRS is predefined as the 10th symbol or the 11th symbol in the slot.
  • the location of the first DMRS and/or the location of the second DMRS are also determined according to the first time domain resource and the second time domain resource.
  • the position of the first DMRS may be the first symbol included in the first time domain resource
  • the position of the second DMRS may be the first symbol included in the second time domain resource.
  • the second indication information may indicate the location of the first DMRS, and the location of the second DMRS is determined according to a predefined or second time domain resource, or may also be determined in other ways.
  • the second indication information may also indicate the location of the second DMRS, and the location of the first DMRS is determined according to a predefined or second time domain resource, or may also be determined in other ways.
  • the side link information described in the embodiment of the present application may also include side link feedback information.
  • the sidelink feedback information can be carried on the sidelink feedback channel (physical sidelink feedback channel, PSFCH), and the sidelink feedback information can include an acknowledgement (acknowledge, ACK)/negative acknowledgement (NACK). ), and/or, one or more of channel state information (CSI) and other information.
  • PSFCH physical sidelink feedback channel
  • NACK negative acknowledgement
  • CSI channel state information
  • the terminal device reports first capability information, where the first capability information is used to indicate whether to support the ability to transmit uplink information and side link information under power hopping.
  • the terminal device can report the ability to send uplink information and side link information that does not support power hopping. Then the terminal device can keep the total power of the uplink information and the side link information constant, and perform concurrent concurrency of the uplink information and the side link information.
  • the terminal device reports second capability information, where the second capability information is used to indicate whether to support the concurrent capability of uplink information and side link information when time domain resources are not completely overlapped.
  • the terminal device can report the concurrent capability of supporting uplink information and side link information when time domain resources are not completely overlapped. Then, when the time domain resources of the uplink information and the side link information partially overlap, the terminal device may perform concurrent concurrency of the uplink information and the side link information.
  • the terminal device may report the concurrent capability of uplink information and sidelink information when the time domain resources are not completely overlapped. Then, the terminal device can perform the concurrent transmission of the uplink information and the side link information signal when the time domain resources of the uplink information and the side link information completely overlap.
  • the terminal device may report third capability information, where the third capability information is used to indicate whether to support the capability of the concurrent situation of uplink information and side link information.
  • the terminal device may report which one or more of the above situations are supported.
  • the terminal device may report which one or more of the above situations is not supported.
  • Step S1601 the first terminal device generates a third DMRS, and sends the third DMRS.
  • the third DMRS is located in the first time domain resource, and the third DMRS is used to demodulate the first side uplink data information in the first time domain resource and the second side uplink data information in the second time domain resource ,
  • the first time domain resource and the second time domain resource do not overlap in time.
  • FIG. 17 exemplarily shows a third DMRS provided by an embodiment of the present application.
  • the third DMRS is located in the first time domain resource and can occupy the same frequency domain resource as the first side uplink data information.
  • Step S1602 the second terminal device receives the third DMRS.
  • Step S1604 The second terminal device receives the first information.
  • the present application does not specifically limit the execution sequence of the foregoing steps S1601 to S1604, and the execution sequence between the steps is defined in accordance with its inherent logic.
  • the first terminal device generates the third DMRS before sending the third DMRS, but the first terminal device generates the first information and sends the first information, and the first terminal sends the third DMRS, there is no certain sequence Relationships can be generated at the same time or at different times, and can also be sent at the same time or at different times.
  • There is no certain sequence relationship between the second terminal device receiving the third DMRS and the second terminal receiving the first information and may be received at the same time or at different times.
  • the second terminal device may receive the third DMRS before the first terminal device generates and/or transmits the first information, or the second terminal device may receive the third DMRS after the first terminal device generates and/or transmits the third DMRS.
  • the second terminal device may receive the first information before the first terminal device generates and/or transmits the third DMRS, or the second terminal device may receive the first information after the first terminal device generates and/or transmits the third DMRS.
  • the first terminal device may also generate second information, which is used to indicate a second power ratio, where the second power ratio is the transmit power of the third DMRS and the first side uplink The ratio between the transmission power of data messages.
  • the second power ratio may be 0 dB.
  • the first terminal device may indicate to the second terminal device the first power ratio, and/or the second power by sending sidelink information (SCI). ratio.
  • SCI sidelink information
  • the above two power ratios can be indicated in the same SCI, or in different SCIs.
  • the network device may send the first power ratio and/or the second power ratio to the first terminal device, for example, through physical layer information (such as DCI) and/or high-layer signaling. That is, the above-mentioned first power ratio and/or second power ratio may also be sent by the network device to the first terminal device through physical layer information (such as DCI) and/or high-level signaling (such as RRC messages), and then the first The terminal device sends to the second terminal device through the SCI.
  • DCI physical layer information
  • RRC messages high-level signaling
  • the first terminal device may directly indicate the specific value of any one of the above-mentioned power ratios, or may indicate the index of any one of the above-mentioned power ratios among multiple candidate power ratios, or one of the power ratios may indicate the specific value, and the other
  • the power ratio indicates the index of the power ratio, which is not limited here.
  • the multiple candidate power ratios may include values such as 0dB, 3dB, -3dB, etc., and may also include other values, which will not be listed here.
  • the first terminal device may not send the foregoing first information and/or second information.
  • the first power ratio and/or the second power ratio may be predefined, or may be obtained through calculations. Specifically, this application does not limit this.
  • the total transmission power of the side uplink information on the symbol transmitted by the side uplink information is constant P
  • the frequency domain resource occupied by the side uplink control information is B1
  • the side uplink data information The total frequency domain resource occupied is B2, then the frequency domain resource occupied by the side link control information in the first time domain resource is B1, and the frequency domain resource occupied by the side link data information is (B2-B1).
  • the power of the side link data information in the second time domain resource is P, assuming that in the first used resource, the power of the side link control information is N dB higher than the power of the side link data information, where N is Integer.
  • the power of the side link information in the first time domain resource is as follows:
  • A is the power scaling factor under the multiplexed symbol, that is, it can be understood that A is the power ratio of the side link data information in the second time domain resource to the side link information in the first time domain resource.
  • the power ratio in the embodiment of the present application can also be understood as the power difference, which is specifically not limited in the present application.
  • FIG. 18 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • the method includes the following steps S1801 to S1804:
  • Step S1801 the first terminal device generates a fourth DMRS, and sends the fourth DMRS.
  • the fourth DMRS is located in the second time domain resource, and the fourth DMRS is used to demodulate the first side uplink data information in the first time domain resource and the second side uplink data information in the second time domain resource ,
  • the first time domain resource and the second time domain resource do not overlap in time.
  • the first side uplink information may include side uplink control information and first side uplink data information
  • the second side uplink information includes second side uplink data information.
  • the uplink control information can be used to schedule the transmission of the first side uplink data information and the transmission of the second side uplink data information.
  • Step S1804 The second terminal device receives the third information.
  • the present application does not specifically limit the execution sequence of the above steps S1801 to S1804, and the execution sequence of each step is defined in accordance with its inherent logic.
  • the first terminal device generates the fourth DMRS before sending the fourth DMRS, but the first terminal device generates the first information and sends the third information, and the first terminal sends the fourth DMRS, there is no certain sequence Relationships can be generated at the same time or at different times, and can also be sent at the same time or at different times.
  • There is no certain sequence relationship between the second terminal device receiving the fourth DMRS and the second terminal receiving the third information and may be received at the same time or at different times.
  • the second terminal device may receive the fourth DMRS before the first terminal device generates and/or transmits the third information, or the second terminal device may receive the fourth DMRS after the first terminal device generates and/or transmits the fourth DMRS.
  • the second terminal device may receive the third information before the first terminal device generates and/or transmits the fourth DMRS, or the second terminal device may receive the third information after the first terminal device generates and/or transmits the fourth DMRS.
  • the second terminal device may demodulate the second side uplink data information according to the fourth DMRS.
  • the second terminal device may also demodulate the first side uplink data information according to the fourth DMRS and the ratio of the transmission power of the fourth DMRS and the transmission power of the first side uplink information indicated in the third information.
  • the first terminal device may indicate the third power ratio and/or the fourth power ratio to the second terminal device by sending sidelink information (SCI).
  • SCI sidelink information
  • the network device may send the first power ratio and/or the second power ratio to the first terminal device, for example, through physical layer information (such as DCI) and/or high-layer signaling.
  • the aforementioned third power ratio and/or fourth power ratio may also be sent by the network device to the first terminal device through physical layer information (such as DCI) and/or high-layer signaling (such as RRC messages), and then the first terminal The terminal device sends to the second terminal device through the SCI.
  • the power ratio in the embodiment of this application may also be referred to as the power difference, which is specifically not limited in this application.
  • the DMRS when the first terminal device sends a DMRS, the DMRS is used to demodulate the first side uplink data information and the second time domain in the first time domain resource.
  • the second side uplink data information in the resource whether the symbol position of the DMRS is located in the first time domain resource or the second time domain resource may be predefined, or may be notified by the first terminal device through signaling Of the second terminal device.
  • the network device may send indication information to the first terminal device to inform the DMRS location, for example, it may be sent to the terminal device through physical layer information (such as DCI) and/or high-level signaling.
  • the terminal device determines the power ratio it can be determined according to the following method:
  • a possible implementation method is to determine whether the first power ratio or the third power ratio is indicated in the signaling according to the symbol position of the DMRS.
  • the signaling indicates the first power ratio.
  • the signaling indicates the third power ratio.
  • Another possible implementation method is to determine whether the first power ratio or the third power ratio is indicated in the signaling according to the pattern information of the DMRS.
  • the DMRS pattern contains the position information of the DMRS, and determining the power ratio indicated in the signaling according to the DMRS pattern is similar to determining the power ratio in the signaling according to the symbol position of the DMRS. Specifically, this application will not repeat it.
  • the terminal device can report its own fourth capability information, which is used to indicate Whether to support the above multiple transmission schemes.
  • the multiple transmission schemes include that the first terminal device sends the first DMRS and the second DMRS to demodulate the first side uplink data information and the second side uplink data information, and the first terminal device sends the third DMRS.
  • the first terminal device sends a fourth DMRS for demodulating the first side uplink data information and the second side uplink data information .
  • Figure 20 shows a schematic diagram of a device.
  • the apparatus 2000 may be a terminal device, or a chip, a chip system, or a processor that supports the terminal device to implement the foregoing method.
  • the device can be used to implement the method described in the foregoing method embodiment, and for details, please refer to the description in the foregoing method embodiment.
  • the device 2000 may include one or more processors 2001, and the processor 2001 may also be referred to as a processing unit, which may implement certain control functions.
  • the processor 2001 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute software programs, and process Software program data.
  • the processor 2001 may also store instructions and/or data 2003, and the instructions and/or data 1503 may be executed by the processor, so that the apparatus 2000 executes the above method embodiments Described method.
  • the device 2000 may include a circuit, which may implement the sending or receiving or communication function in the foregoing method embodiment.
  • the device 2000 may include one or more memories 2002, on which instructions 2004 may be stored, and the instructions may be executed on the processor, so that the device 2000 executes the foregoing method embodiments Described method.
  • data may also be stored in the memory.
  • instructions and/or data may also be stored in the processor.
  • the processor and memory can be provided separately or integrated together. For example, the corresponding relationship described in the foregoing method embodiment may be stored in a memory or in a processor.
  • the device 2000 may further include a transceiver 2005 and/or an antenna 2006.
  • the processor 2001 may be referred to as a processing unit, and controls the device 2000.
  • the transceiver 2005 may be called a transceiver unit, a transceiver, a transceiver circuit or a transceiver, etc., for implementing the transceiver function.
  • the apparatus 2000 can transmit the first DMRS used to demodulate the first side link information in the first time domain resource and the second side link information used to demodulate the second time domain resource in the same time unit
  • the second DMRS of the link information so that the side link information in the two time domain resources that do not overlap in the time domain can be received and demodulated using different DMRS, thereby improving the transmission performance on the side link .
  • the IC collection may also include storage components for storing data and/or instructions;
  • ASIC such as modem (MSM)
  • the processor can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal out in the form of electromagnetic waves through the antenna. .
  • the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and performs processing on the data. deal with.
  • FIG. 21 only shows a memory and a processor. In actual terminal devices, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present invention.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the device may be a terminal or a component of the terminal (for example, an integrated circuit, a chip, etc.).
  • the device may also be a network device, or a component of a network device (for example, an integrated circuit, a chip, etc.).
  • the device may also be another communication module, which is used to implement the method in the method embodiment of the present application.
  • the apparatus 2200 may include: a processing module: 2202 (processing unit).
  • it may also include a transceiver module 2201 (transceiver unit) and a storage module 2203 (storage unit).
  • one or more modules in Figure 22 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors It can be implemented with a transceiver; or implemented by one or more processors, memories, and transceivers, which is not limited in the embodiment of the present application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the device has the function of implementing the network device described in the embodiment of this application.
  • the device includes the module or unit or means corresponding to the network device executing the steps involved in the network device described in the embodiment of this application.
  • the functions or units or means (means) can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • an apparatus 2200 may include: a processing module 2202, configured to generate a first demodulation reference signal DMRS; the transceiver module 2201 is configured to send the first DMRS, and the first DMRS is configured to Demodulate the first side uplink information in the first time domain resource; the processing module 2202 is also used to generate a second DMRS, the transceiver module 2201 is also used to send the second DMRS, the second DMRS is used Demodulate the second side link information in the second time domain resource; wherein, the first DMRS and the second DMRS are located in the same time unit, and the first time domain resource and the second time domain Resources do not overlap in time.
  • a processing module 2202 configured to generate a first demodulation reference signal DMRS
  • the transceiver module 2201 is configured to send the first DMRS
  • the first DMRS is configured to Demodulate the first side uplink information in the first time domain resource
  • the processing module 2202 is also used to generate a second DMRS
  • the first time domain resource is also used to carry uplink information.
  • the first side uplink information includes side uplink control information and first side uplink data information
  • the second side uplink information includes second side uplink data information
  • the first DMRS is used to demodulate the side uplink control information and/or the first side uplink data information
  • the second DMRS is used to demodulate the second side uplink data information.
  • the side link control information is used to schedule the transmission of the first side link data information and the transmission of the second side link data information.
  • the transceiver module 2201 is further configured to send first indication information, where the first indication information is used to indicate the first time domain resource and/or the second time domain resource.
  • the transceiver module 2201 is further configured to send second indication information, where the second indication information is used to indicate the location of the first DMRS and/or the location of the second DMRS.
  • an apparatus 2200 may include:
  • the transceiver module 2201 is configured to receive a first demodulation reference signal DMRS, where the first DMRS is used to demodulate the first side uplink information in the first time domain resource; the transceiver module 2201 is also configured to receive Two DMRS, the second DMRS is used to demodulate the second side uplink information in the second time domain resource; the processing module 2202 is used to demodulate the first side in the first time domain resource according to the first DMRS Uplink information, and demodulate the second side uplink information in the second time domain resource according to the second DMRS; wherein the first DMRS and the second DMRS are located in the same time unit, and the first DMRS A time domain resource and the second time domain resource do not overlap in time.
  • DMRS demodulation reference signal
  • the first time domain resource is also used to carry uplink information.
  • the first side uplink information includes side uplink control information and first side uplink data information
  • the second side uplink information includes second side uplink data information
  • the first DMRS is used to demodulate the side uplink control information and/or the first side uplink data information
  • the second DMRS is used to demodulate the second side uplink data information.
  • the side link control information is used to schedule the transmission of the first side link data information and the transmission of the second side link data information.
  • the transceiver module 2201 is further configured to: receive first indication information, where the first indication information is used to indicate the first time domain resource and/or the second time domain resource.
  • the transceiver module 2201 is further configured to receive second indication information, where the second indication information is used to indicate the location of the first DMRS and/or the location of the second DMRS.
  • the device 2200 can transmit the first DMRS used to demodulate the first side link information in the first time domain resource and the second side link information used to demodulate the second time domain resource in the same time unit
  • the second DMRS of the link information so that the side link information in the two time domain resources that do not overlap in the time domain can be received and demodulated using different DMRS, thereby improving the transmission performance on the side link .
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • processing units used to execute these technologies at communication devices can be implemented in one or more general-purpose processors, DSPs, digital signal processing devices, ASICs, Programmable logic device, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination of the foregoing.
  • the general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine.
  • the processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the function of any of the foregoing method embodiments is realized.
  • This application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.
  • system and “network” in this article are often used interchangeably in this article.
  • the term “and/or” in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone In the three cases of B, A can be singular or plural, and B can be singular or plural.
  • At least one of or “at least one of” herein means all or any combination of the listed items, for example, "at least one of A, B and C", It can mean: A alone exists, B alone exists, C exists alone, A and B exist at the same time, B and C exist at the same time, A, B and C exist at the same time, where A can be singular or plural, and B can be Singular or plural, C can be singular or plural.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • the corresponding relationships shown in the tables in this application can be configured or pre-defined.
  • the value of the information in each table is only an example and can be configured to other values, which is not limited in this application.
  • it is not necessarily required to configure all the correspondences indicated in the tables.
  • the corresponding relationship shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, such as splitting, merging, and so on.
  • the names of the parameters shown in the titles in the above tables may also be other names that can be understood by the communication device, and the values or expressions of the parameters may also be other values or expressions that can be understood by the communication device.
  • other data structures can also be used, such as arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables. Wait.
  • the pre-definition in this application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-fired.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

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Abstract

Un procédé de communication de liaison latérale et un dispositif, qui sont appropriés pour V2X, l'Internet des véhicules, les véhicules intelligents en réseau, l'aide à la conduite, la conduite intelligente et d'autres domaines sont fournis. Le procédé comprenant les étapes suivantes : un premier appareil terminal génère et envoie un premier DMRS, le premier DMRS est utilisé pour démoduler les premières informations de liaison latérale dans la première ressource de domaine temporel ; le premier appareil de terminal génère et envoie un second DMRS, le second DMRS est utilisé pour démoduler les secondes informations de liaison latérale dans la seconde ressource de domaine temporel. Du fait que le premier appareil terminal peut envoyer le premier DMRS utilisé pour démoduler les premières informations de liaison latérale dans la première ressource de domaine temporel, et que le second DMRS utilisé pour démoduler les secondes informations de liaison latérale dans la seconde ressource de domaine temporel dans la même unité de temps, par conséquent, les informations de liaison latérale dans les deux ressources de domaine temporel qui ne se chevauchent pas dans le domaine temporel peuvent être reçues et démodulées au moyen de différents DMRS, ce qui peut améliorer les performances de transmission sur la liaison latérale.
PCT/CN2019/101453 2019-08-19 2019-08-19 Procédé et dispositif de communication de liaison latérale Ceased WO2021031090A1 (fr)

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