CN114600525A - Communication method and device - Google Patents
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Abstract
The application discloses communication method and device, the method can be applied to the Internet of vehicles, such as V2X, LTE-V, V2V and the like, or can be used in the fields of intelligent driving, intelligent Internet of vehicles and the like, and the method comprises the following steps: the method comprises the steps that a first terminal device detects transmission parameters used for a second terminal device to send sideline information on a first resource, wherein the transmission parameters comprise transmission modes or path loss types, the transmission modes comprise broadcasting, unicasting and multicasting, the transmission modes comprise broadcasting, unicasting or multicasting, and the path loss types comprise sideline link path loss and downlink path loss; and the first terminal device determines whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information. By this method, interference and resource collision between resources for transmitting data by a plurality of terminal apparatuses can be reduced.
Description
The present application relates to the field of mobile communications technologies, and in particular, to a communication method and apparatus.
The internet of vehicles has recently received increasing attention as a key technology of future Intelligent Transportation Systems (ITS). The system of vehicle and any device (V2X) is a key technology in the car networking. V2X, which includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) communication interaction. Except for V2N vehicle and network communications using uplink and downlink, the remaining V2V/V2I/V2P data communications use Sidelink (SL) communications.
In the New Radio (NR) V2X technology, two resource allocation modes are supported, which are Mode (Mode)1 and Mode2, respectively. The Mode1 is that a network device, such as a base station or a relay station, allocates resources to a terminal device by means of scheduling. Mode2 is the network device allocates a whole block of resources (hereinafter referred to as a resource pool) in advance, and the terminal device autonomously selects available resources in the resource pool for transmitting data. When selecting available resources, the terminal device listens (sending) the resources of the resource pool and acquires a sending result. The sending refers to selecting currently unoccupied sending resources in the resource pool for transmission by listening to the occupation situation of different time-frequency resources in the resource pool within a period of time, for example, by energy detection. A resource unit in the resource pool may be considered occupied if a measurement of energy detection, e.g., Reference Signal Received Power (RSRP), for that resource unit exceeds a certain threshold.
In the NR V2X technology, V2X may have three transmission modes, i.e., broadcast (broadcast), multicast (group) and unicast (unicast), and all the terminal apparatuses in the three transmission modes may select resources from the same resource pool. If at least two transmission modes exist simultaneously, the power difference of the terminal devices adopting different transmission modes to transmit data is large, so that a plurality of terminal devices may select the same resource to transmit data, and resource interference and resource conflict are caused.
Disclosure of Invention
Embodiments of the present application provide a communication method and apparatus, which can reduce interference and resource collision between resources for transmitting data by multiple terminal apparatuses.
In a first aspect, a communication method is provided, and the method includes: the method comprises the steps that a first terminal device detects transmission parameters for a second terminal device to send side-row information on a first resource, wherein the transmission parameters comprise transmission modes or path loss types, the transmission modes comprise broadcasting, unicasting and multicasting, and the path loss types comprise side-row link path loss and downlink path loss; and the first terminal device determines whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information. It will be appreciated that the method may be performed by a first device, which may be a communication device or a communication apparatus capable of supporting the communication device to perform the functions required by the method, such as a system-on-chip or a communication module in a communication device. Illustratively, the communication apparatus may be a terminal device.
In a second aspect, there are provided two communication methods, the methods comprising: the network device sends first configuration information to a terminal device, where the first configuration information is used to indicate at least one energy detection threshold, the at least one energy detection threshold corresponds to at least one transmission mode used for sending sideline information or corresponds to at least one path loss type used for sending sideline information, the transmission parameter includes a transmission mode or a path loss type, the transmission mode includes broadcast, unicast, or multicast, and the path loss type includes sideline link path loss and downlink path loss. It will be appreciated that the method may be performed by a second device, which may be a communication device or a communication apparatus capable of supporting the communication device to perform the functions required by the method, such as a system-on-chip or a communication module in a communication device. Illustratively, the communication device may be a network device.
In some embodiments of the first and second aspects, the network device may generate the first configuration information, that is, configure a transmission parameter, such as an energy detection threshold corresponding to a transmission mode or a path loss type. The first terminal device may determine whether a first resource for the second terminal device to transmit the sidelink information is available according to the first configuration information. In this embodiment, there are at least two transmission parameters, and the network device may configure different energy detection thresholds for the different transmission parameters, for example, if the path loss of the communication link caused by broadcast is larger than the path loss of the path link caused by unicast, the energy detection threshold corresponding to broadcast may be lower than the energy detection threshold corresponding to unicast. Due to the fact that the energy detection thresholds corresponding to different transmission parameters are different, the occupation situation of resources can be judged more accurately according to the energy detection thresholds corresponding to different transmission parameters, and therefore the problems of resource conflict and interference caused by the fact that different terminal devices select the same resources due to the fact that the difference value of the transmitting power corresponding to different transmission parameters is large are avoided. It can be seen that, with the method provided in this embodiment of the present application, in a scenario where there may be at least two transmission modes or two path loss types simultaneously in communication of V2X, the first terminal device may determine whether the first resource is a candidate resource, so as to reduce potential interference and resource collision when multiple terminal devices transmit data.
In a possible design of the first aspect, the determining, by the first terminal device, whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter includes:
determining that the first resource is not a candidate resource if the energy detection on the first resource is greater than or equal to a threshold corresponding to the transmission parameter; or,
determining that the first resource is a candidate resource if the energy detection on the first resource is less than a threshold corresponding to the transmission parameter.
This scheme provides a specific way for the first terminal device to determine whether the first resource is a candidate resource.
In one possible design of the first aspect, the detecting, by the first terminal device, the transmission parameter of the sidelink information transmitted by the second terminal device on the first resource by the first terminal device includes any one of:
for example, the first terminal device detects, in a listening window, first control information from the second terminal device, where the first control information is used to indicate the transmission mode. This scheme is straightforward in that the first control information, for example, Sidelink Control Information (SCI), indicates the transmission scheme of the second terminal apparatus.
Illustratively, the first control information is a first-level SCI, the first control information includes indication information of a second-level SCI format, and the second-level SCI format corresponds to the transmission mode. According to the scheme, the transmission mode of the second terminal device is indicated through the two-level SCI, wherein the second-level SCI format corresponds to the transmission mode, namely the transmission mode is indicated through an implicit mode, the practicability of the scheme is improved, and the flexibility of the scheme is further improved by combining the exemplary scheme.
In a possible design of the first aspect, the first terminal device further receives first configuration information from the network device, where the first configuration information is different for different transmission parameters, and several implementations of the first configuration information are listed below.
In a possible implementation manner, the transmission parameter is a transmission manner, and the first configuration information may be any one of the following:
it is first designed that the first configuration information is used to indicate at least one energy detection threshold, where the at least one energy detection threshold includes a first energy detection threshold, a second energy detection threshold, and a third energy detection threshold, the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast. The design scheme is simple and clear, and the corresponding energy detection threshold is independently configured for each transmission mode.
Second, the first configuration information is used to indicate at least one energy detection threshold, where the at least one energy detection threshold includes a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast.
The design scheme configures an energy detection threshold for unicast and shares an energy detection threshold for broadcast and multicast, thereby further reducing the signaling overhead of network equipment for sending the first configuration information.
Third, the first configuration information is used to indicate at least one energy detection threshold, where the at least one energy detection threshold includes a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcast, and the second energy detection threshold corresponds to unicast and multicast.
The design scheme configures an energy detection threshold for broadcasting, and shares an energy detection threshold for unicast and multicast, thereby further reducing the signaling overhead of network equipment for sending the first configuration information.
Fourth, the first configuration information is used to indicate at least one energy detection threshold and at least one threshold offset, the at least one energy detection threshold includes a first energy detection threshold, wherein,
the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or,
the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcast, and the second threshold offset corresponds to multicast; or,
the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to a unicast and a multicast; or,
the first energy detection threshold corresponds to a broadcast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to a unicast, and the second threshold offset corresponds to a multicast.
According to the design scheme, a certain transmission mode, for example, a first energy detection threshold corresponding to a first transmission mode is used as a reference, and energy detection thresholds of other transmission modes are indicated through threshold offsets, so that signaling overhead of network equipment for sending first configuration information can be further reduced. The threshold offset may be one, that is, the remaining transmission modes except the first transmission mode correspond to the threshold offset; or the threshold shift can be multiple, and different threshold shifts enhance the applicability of the scheme for different other transmission modes. Further, the threshold offset may be predefined, so that while reducing signaling overhead of the network device for sending the first configuration information, the signaling configuration mode may be simplified, and a process of selecting resources by the terminal device may be simplified.
In another possible implementation manner, the transmission parameter is a path loss type, and the first configuration information may be any one of the following:
in a fifth design, the first configuration information is used to indicate at least one energy detection threshold, where the at least one energy detection threshold includes a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to a sidelink path loss, and the second energy detection threshold corresponds to a downlink path loss. Generally, the path loss caused by broadcasting is large, so that the broadcasting can be configured as a sidelink path loss, and relatively speaking, the unicast and multicast can be configured as a downlink path loss, that is, the transmission mode is indicated by the type of the path loss.
The design scheme configures different energy detection thresholds for different path losses, namely independently configures the energy detection threshold for each path loss, can more accurately judge the occupation condition of resources when different path loss types are adopted, and avoids the problems of resource conflict and interference caused by different terminal devices selecting the same resources.
A sixth design, where the first configuration information is used to indicate at least one energy detection threshold, where the at least one energy detection threshold includes a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or, the first energy detection threshold is an energy detection threshold corresponding to a side link path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
According to the design scheme, a first energy detection threshold corresponding to certain path loss, for example, downlink path loss, is used as a reference, and the energy detection threshold of the sidelink path loss is indicated through a threshold offset, so that the signaling overhead of the network equipment for sending the first configuration information is further reduced. Further, the threshold offset may be predefined to simplify the signaling configuration as much as possible and simplify the process of selecting resources by the terminal device.
In yet another possible implementation manner, the first configuration information may be used to indicate a first energy detection threshold, and the first terminal device determines the energy detection threshold corresponding to the transmission manner according to at least one maximum transmission power of the second terminal device and the first configuration information. The design scheme can further reduce the signaling overhead of the network equipment for sending the first configuration information.
In one possible design of the first aspect, the first terminal device further receives second configuration information from the network equipment, the second configuration information indicating the at least one maximum transmit power. The maximum transmission power corresponding to different transmission parameters may be different, that is, the corresponding second configuration information is also different, and several implementation manners of the second configuration information are listed below.
Seventhly, the at least one maximum transmission power includes a first maximum transmission power, a second maximum transmission power, and a third maximum transmission power, where the first maximum transmission power corresponds to broadcast, the second maximum transmission power corresponds to unicast, and the third maximum transmission power corresponds to multicast.
The design scheme can configure different maximum transmitting powers for different transmission parameters, and the applicability of the scheme is enhanced by indicating the energy detection threshold corresponding to the transmission parameters through the maximum transmitting power. Different maximum transmission powers are configured for different transmission parameters, for example, a smaller maximum transmission power is configured for unicast, so that power waste caused by excessive power can be avoided.
Eighthly, the at least one maximum transmission power includes a first maximum transmission power and a second maximum transmission power, where the first maximum transmission power corresponds to broadcast and the second maximum transmission power corresponds to unicast or multicast; or, the first maximum transmission power corresponds to unicast, and the second maximum transmission power corresponds to broadcast or multicast.
According to the design scheme, one transmission mode corresponds to one maximum transmission power, for example, broadcast, the other two transmission modes multiplex one maximum transmission power, for example, unicast and multicast, and the network equipment only needs to configure two maximum transmission powers, so that the signaling overhead for transmitting the second configuration information can be reduced, and the signaling configuration mode is simplified.
In another possible design, the second configuration information may be indicative of a first maximum transmit power and at least one transmit power offset, wherein,
ninthly, the first maximum transmission power corresponds to unicast, the at least one transmission power offset includes a first transmission power offset, and the first transmission power offset corresponds to broadcast or multicast; or the first maximum transmission power corresponds to a broadcast, the at least one transmission power offset includes a first transmission power offset, and the first transmission power offset corresponds to a unicast or a multicast.
In the design scheme, a first energy detection threshold corresponding to a certain transmission mode, for example, unicast, is used as a reference, and a maximum transmission power threshold offset is used to indicate energy detection thresholds of other transmission modes, so that signaling overhead for sending second configuration information by network equipment can be further reduced.
A tenth design, where the first maximum transmit power corresponds to unicast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or the first maximum transmission power corresponds to a broadcast, the at least one transmission power offset includes a first transmission power offset and a second transmission power offset, the first transmission power offset corresponds to a unicast, and the second transmission power offset corresponds to a multicast.
The design scheme also takes a first energy detection threshold corresponding to a certain transmission mode, such as unicast, as a reference, the maximum transmission power threshold offset may be multiple, and different maximum transmission power threshold offsets enhance the applicability of the scheme to different other transmission modes. Since the indication information for the energy detection threshold is not increased, power waste can be avoided.
In one possible design, the determining, by the first terminal device, a second energy detection threshold corresponding to the transmission mode according to at least one maximum transmission power of the second terminal device and the first configuration information includes: the first terminal device determines a first maximum transmission power corresponding to the transmission mode from at least one maximum transmission power of the second terminal device according to the second configuration information; determining, by the first terminal device, a transmit power threshold offset, where the transmit power threshold offset is a difference between the first maximum transmit power and a maximum transmit power corresponding to the first energy detection threshold; the first terminal device determines the second energy detection threshold according to the transmission power threshold offset and the first energy detection threshold.
In this scheme, a plurality of maximum transmission powers are configured by the network device, the first terminal device may determine, according to the configured plurality of maximum transmission powers, a transmission power threshold offset corresponding to the second terminal device, where the transmission power threshold offset may be understood as an energy detection threshold offset, and then may determine an energy detection threshold of the second terminal device according to the transmission power threshold offset and the first energy detection threshold. It can be seen that the scheme provides another way of indirectly indicating the energy detection threshold, and the applicability of the scheme is enhanced.
In one possible design of the second aspect, the method further includes:
and the network equipment configures the path loss type according to the transmission mode.
In one possible design of the second aspect, the at least one energy detection threshold includes a first energy detection threshold, a second energy detection threshold, and a third energy detection threshold, where the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
In one possible design of the second aspect, the at least one energy detection threshold includes a first energy detection threshold, the first configuration information is further used to indicate at least one threshold offset, wherein,
the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcasting, and the second threshold offset corresponds to multicasting; or,
the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to a unicast and a multicast; or the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to unicast, and the second threshold offset corresponds to multicast.
In one possible design of the second aspect, the at least one energy detection threshold includes a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to a sidelink path loss, and the second energy detection threshold corresponds to a downlink path loss; or,
the at least one energy detection threshold comprises a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,
the at least one energy detection threshold includes a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side uplink path loss, and the threshold offset is an absolute value of a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
In one possible design of the second aspect, the method further includes:
the network equipment generates second configuration information, wherein the second configuration information is used for indicating at least one maximum transmission power; and the network equipment sends the second configuration information to the terminal equipment.
In one possible design of the second aspect, the at least one maximum transmit power includes a first maximum transmit power, a second maximum transmit power, and a third maximum transmit power, the first maximum transmit power corresponds to broadcast, the second maximum transmit power corresponds to unicast, and the third maximum transmit power corresponds to multicast; or,
the at least one maximum transmit power comprises a first maximum transmit power and a second maximum transmit power, the first maximum transmit power corresponds to broadcast, and the second maximum transmit power corresponds to unicast or multicast; or,
the at least one maximum transmit power includes a first maximum transmit power and a second maximum transmit power, the first maximum transmit power corresponding to unicast and the second maximum transmit power corresponding to broadcast or multicast.
In one possible design of the second aspect, the at least one maximum transmit power comprises a first maximum transmit power, the second configuration information further indicates at least one transmit power offset, wherein,
the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,
the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or,
the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to a unicast or a multicast; or,
the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
In one possible design of the second aspect, the at least one energy detection threshold includes a first energy detection threshold.
For technical effects of any embodiment of the second aspect or the second aspect, refer to technical effects of any embodiment of the first aspect or the first aspect, and are not described herein again.
In a third aspect, a communication method is provided, and the communication method includes: the terminal device receives first indication information from network equipment, wherein the first indication information is used for indicating a first determination mode in a plurality of determination modes of a Modulation Coding Scheme (MCS); the terminal device determines an MCS to be employed according to the first determination method. It will be appreciated that the method may be performed by a first device, which may be a communication device or a communication apparatus capable of supporting the communication device to perform the functions required by the method, such as a system-on-chip or a communication module in a communication device. Illustratively, the communication apparatus may be a terminal device.
In a fourth aspect, a communication method is provided, the communication method including: the network equipment transmits first indication information to the terminal device, wherein the first indication information is used for indicating a first determination mode in a plurality of determination modes of Modulation Coding Schemes (MCS). It will be appreciated that the method may be performed by a first device, which may be a communication device or a communication apparatus capable of supporting the communication device to perform the functions required by the method, such as a system-on-chip or a communication module in a communication device. Illustratively, the communication device may be a network device.
In some embodiments of the third aspect or the fourth aspect, in a scenario that multiple MCS configurations are supported, the terminal device may be explicitly instructed to select the determination manner of the MCS by the first indication information.
In some embodiments of the third aspect or the fourth aspect, the first indication information is carried in an MCS field of downlink control information, DCI, and a value of a reserved bit of the MCS field is used to indicate the first determination manner, where,
the first determination method is that the terminal device selects an MCS within an index range of all MSCs, or the first determination method is that the terminal device selects an MCS within a first index range of an MSC, where the first index range is a subset of the index range of all MSCs.
The scheme adopts the value of the reserved bit of the MCS domain of the DCI, and can support two determination modes of automatically selecting the MCS by a newly added terminal device on the premise of not modifying the value range of the MCS in the current DCI, namely on the premise of being compatible with the MCS domain of the current DCI.
In some embodiments of the third or fourth aspect, the first indication information is further carried in radio resource control, RRC, signaling, the RRC signaling being used to configure at least one index range of the MCS, and the first index range is a subset of the at least one index range.
The scheme adopts RRC signaling to configure and select the index range of the MCS for the terminal device, and is flexible.
In some embodiments of the third or fourth aspect, the reserved bits of the MCS field are further used to indicate a transmission type of a transport block, where the transmission type includes initial transmission, retransmission, or transmission configured by higher layer signaling, where,
the reserved bit of the MCS field is used to indicate that the transmission type is primary transmission, a first value of the reserved bit of the MCS field is used to indicate that the terminal device selects an MCS within a first index range of the MCS, a second value of the reserved bit of the MCS field is used to indicate that the terminal device selects an MCS within a second index range of the MCS, the first index range is a subset of the at least one index range, and the second index range is a subset of the at least one index range; or,
the reserved bit of the MCS field is used to indicate that the transmission type is retransmission or transmission configured through a high-level signaling, and the reserved bit of the MCS field is used to indicate that the MCS is a previous corresponding MCS of the same transport block.
In the scheme, the reserved bits in the MCS field may also indicate the transmission type of the transport block in a multiplexing manner, for example, initial transmission, retransmission, or transmission configured by a higher layer signaling, and the like.
In a fifth aspect, a communication device is provided, where beneficial effects may be described with reference to the first aspect, and are not described herein again, and the communication device has a function of implementing the behaviors in the method embodiment of the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes a processing module and a transceiver module, where the processing module is configured to detect a transmission parameter received by the transceiver module for a second terminal device to transmit sidelink information on a first resource, the transmission parameter includes a transmission mode or a path loss type, the transmission mode includes broadcast, unicast and multicast, and the path loss type includes sidelink path loss and downlink path loss; and determining whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information. The modules may perform corresponding functions in the method example of the first aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
A sixth aspect provides a communication device, the beneficial effects of which can be described with reference to the second aspect and will not be described herein again, and the communication device has a function of implementing the behaviors in the method embodiment of the second aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes a processing module and a transceiver module, wherein,
the transceiver module is configured to send, to a terminal device, first configuration information determined by the processing module, where the first configuration information is used to indicate at least one energy detection threshold, the at least one energy detection threshold corresponds to at least one transmission mode used for sending sideline information or corresponds to at least one path loss type used for sending sideline information, the transmission parameter includes a transmission mode or a path loss type, the transmission mode includes broadcast, unicast, and multicast, and the path loss type includes sideline link path loss and downlink path loss. The modules may perform corresponding functions in the method example of the second aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
In a seventh aspect, a communication apparatus is provided, where beneficial effects may be described with reference to the third aspect, and details are not repeated here, and the communication apparatus has a function of implementing the behavior in the method embodiment of the third aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication apparatus includes a transceiver module and a processing module, where the transceiver module is configured to receive first indication information from a network device, and the first indication information is used to indicate a first determination manner of multiple determination manners of a modulation and coding scheme, MCS; the processing module is configured to determine an MCS to be used according to the first determination mode. It will be appreciated that the method may be performed by a first device, which may be a communication device or a communication means capable of supporting the communication device to perform the functions required by the method, such as a system on a chip or a communication module in a communication device. Illustratively, the communication apparatus may be a terminal device. The modules may perform corresponding functions in the method example of the third aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
An eighth aspect provides a communication apparatus, where beneficial effects may be described in reference to the fourth aspect, and are not described herein again, and the communication apparatus has a function of implementing the behaviors in the method embodiment of the fourth aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes a processing module and a transceiver module, where the transceiver module is configured to send, to a terminal device, first indication information determined by the processing module, where the first indication information is used to indicate a first determination manner of multiple determination manners of modulation and coding schemes MCS. These modules may perform corresponding functions in the method example of the fourth aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
A ninth aspect provides a communication device, which may be the communication device in the fifth or sixth or seventh or eighth aspects of the method embodiments described above, or a chip provided in the communication device in the fifth or sixth or seventh or eighth aspects. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is used for storing computer programs or instructions or data, the processor is coupled with the memory and the communication interface, and when the processor reads the computer programs or instructions or data, the processor causes the communication device to execute the method executed by the network device or the terminal device in the above method embodiments.
It is to be understood that the communication interface may be a transceiver in the communication device, e.g. realized by an antenna, a feeder, a codec, etc. in said communication device, or, if the communication device is a chip provided in a network device, the communication interface may be an input/output interface of the chip, e.g. an input/output pin, etc. The transceiver is used for the communication device to communicate with other equipment. Illustratively, when the communication apparatus is a terminal apparatus, the other device is a network device; alternatively, when the communication apparatus is a network device, the other device is a terminal apparatus.
In a tenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method performed by the communication apparatus in the fifth aspect, the sixth aspect, the seventh aspect, or the eighth aspect. In one possible design, the system-on-chip further includes a memory for storing program instructions and/or data. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In an eleventh aspect, the present invention provides a communication system, where the system includes the communication apparatus in the fifth aspect and the communication apparatus in the sixth aspect, or includes the communication apparatus in the seventh aspect and the communication apparatus in the eighth aspect.
In a twelfth aspect, there is provided a computer program product comprising: computer program code which, when run, causes the method performed by the network apparatus in the above aspects to be performed, or causes the method performed by the terminal apparatus in the above aspects to be performed; or cause the method performed by the terminal apparatus in the above-described aspects to be performed.
In a thirteenth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed, implements the method performed by the network device in the above-described aspects; or to implement the method performed by the terminal apparatus in the above-described aspects.
In this embodiment, the network device may configure different energy detection thresholds for different transmission parameters, and even if there are at least two transmission parameters, because the energy detection thresholds corresponding to different transmission parameters are different, the first terminal device may determine, as a candidate resource, a first resource actually used by the second terminal device, that is, a resource collision may be caused, because the transmission power difference corresponding to different transmission parameters is large.
FIG. 1 is a schematic view of V2X provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a possible application scenario applied in the embodiment of the present application;
fig. 3 is a schematic diagram of an interception resource according to an embodiment of the present application;
FIG. 4 is a diagram illustrating a network architecture applied in the embodiment of the present application;
fig. 5 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 6 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 7 is a schematic diagram of a communication device according to an embodiment of the present application;
fig. 8 is another schematic diagram of a communication device according to an embodiment of the present application;
fig. 9 is a further schematic diagram of a communication device according to an embodiment of the present application;
fig. 10 is a schematic diagram of a communication device according to an embodiment of the present application;
fig. 11 is another schematic diagram of a communication device according to an embodiment of the present application;
fig. 12 is a further schematic diagram of a communication device according to an embodiment of the present application.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Before the embodiments of the present application are described, some terms and concepts related to the embodiments of the present application will be explained briefly herein for the convenience of those skilled in the art.
1) Terminal apparatus, also called terminal devices, include devices providing voice and/or data connectivity to a user, which may include, for example, handheld devices having wireless connection capabilities or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a V2X terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber state), a mobile station (mobile state), a remote station (remote state), an access point (access point, AP), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), a passenger plane (e.g., an unmanned plane, hot air balloon, or the like), or a user equipment (user), etc. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.
By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.
The various terminal devices described above, if located on a vehicle (e.g., placed in or installed in the vehicle), may be considered to be vehicle-mounted terminal devices, which are also referred to as on-board units (OBUs), for example. The terminal device of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit built into the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, on-board component, on-board chip, or on-board unit.
2) A network device, for example, including AN Access Network (AN) device, such as a base station (e.g., AN access point), may refer to a device in the access network that communicates with a wireless terminal device over one or more cells in AN air interface, or a network device in V2X technology is a Road Side Unit (RSU), for example. The base station may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The RSU may be a fixed infrastructure entity supporting the V2X application and may exchange messages with other entities supporting the V2X application. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE) system or an advanced long term evolution (LTE-a) system, or may also include a next generation Node B (gNB) in a 5G NR system, or may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud access network (Cloud RAN) system, which is not limited in the embodiments of the present application.
3) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple.
And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first configuration information and the second configuration information are only for distinguishing different configuration information, and do not indicate a difference in priority, transmission order, importance, or the like between the two messages.
Having described some of the concepts related to the embodiments of the present application, the following describes features of the embodiments of the present application.
The technical solution of the embodiment of the present application described below can be applied to a V2X communication system. In the Rel-14/15/16 version, V2X has emerged as a major application for device-to-device (D2D) technology. The V2X optimizes the specific application requirements of the V2X based on the existing D2D technology, and needs to further reduce the access delay of the V2X device and solve the problem of resource conflict.
Please refer to fig. 1, which is a schematic diagram of a network architecture of V2X. V2X specifically includes several application requirements, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) communication interaction. As shown in fig. 1, V2V refers to inter-vehicle communication; V2P refers to vehicle-to-person communication (including pedestrians, cyclists, drivers, or passengers); V2I refers to vehicle communication with network devices, such as RSUs, and another V2N may be included in V2I, V2N refers to vehicle communication with base stations/networks.
Among them, the RSU includes two types: the RSU of the terminal type is in a non-mobile state because of being arranged on the roadside, and the mobility does not need to be considered; the RSU, being of the base station type, can provide timing synchronization and resource scheduling to the vehicle with which it communicates.
Please refer to fig. 2, which is a schematic diagram of a possible application scenario applied in the embodiment of the present application. Fig. 2 includes 3 terminal devices, and of course, the number of terminal devices in fig. 2 is only an example. Any one of the 3 terminal devices may communicate with the remaining 2 terminal devices via a V2X link, which may also be referred to as a sidelink (sidelink). The terminal devices in fig. 2 are User Equipment (UE) 1, UE2 and UE3, respectively, UE1 and UE2 communicate via a V2X link, and UE3 and UE1 communicate via a V2X link. The UE1, UE2, or UE3 need to confirm available resources before transmitting data in order to avoid resource collision selected by, for example, UE1 and UE2, resulting in mutual interference with each other in transmission of data, or resulting in a failure in data transmission.
In the NR V2X technology, two resource allocation modes are supported, which are Mode1 and Mode2, respectively. Mode1 indicates that a network device, such as a base station or a relay station, allocates resources to a terminal apparatus by means of scheduling. Mode2 means that the network device allocates a resource pool in advance, and the terminal device autonomously selects available resources in the resource pool for transmitting data. And the terminal device carries out sending on the resources of the resource pool when selecting the available resources and acquires the sending result. sending refers to listening to the occupation of different time-frequency resources in a resource pool within a period of time.
Sensing includes energy detection and SCI decoding. Energy detection refers to detecting energy, such as RSRP or Reference Signal Received Quality (RSRQ), of a certain resource unit in a resource pool. And the terminal device selects the resources which are not occupied currently in the resource pool to transmit data according to the measurement result of the energy detection. A resource unit in the resource pool may be considered to be already occupied if a measurement of energy detection for the resource unit exceeds a certain threshold. Conversely, if the measurement result of energy detection for a certain resource unit in the resource pool is lower than a certain threshold, the resource unit may be considered to be unoccupied, i.e. may be used as a candidate resource.
The SCI decoding process is that a UE receives SCIs sent by other UEs in the resource pool and decodes the received SCIs. Since the information of the resource occupied by the data to be transmitted by a certain UE in the resource pool can be indicated by the SCI, that is, the SCI includes the resource information of the corresponding transmitted data, a certain UE can know the resource occupied by other UEs in the resource pool by decoding the SCIs of other UEs. A resource is considered occupied if the SCI decoding is successful and indicates a resource occupancy condition. If SCI decoding is unsuccessful, other UEs are considered not occupying resources in the resource pool.
Both energy detection and SCI decoding operate in a fixed size window of time (time window) in the resource pool. As shown in fig. 3, the size of the listening window (listening window) of each UE is, for example, a time window of 1 second(s), i.e., (n-a) - (n-b) ═ 1. After the UE determines the resources corresponding to the available resources, e.g., the selection windows of n + T1 through n + T2, in the sending window, the UE selects the appropriate resources for SCI and data among the available resources for transmission of SCI and data. For example, the terminal device may select an appropriate resource (resource corresponding to n + c) and an appropriate resource (resource corresponding to n + d) for the SCI in the selection window (n + T1, n + T2) at a time n after the sending window (fig. 3 is indicated by a dotted line between the listening window and the selection window, and an arrow indicates selection). In fig. 3, the abscissa represents the time domain and the ordinate represents the frequency domain.
And the UE uses the sending SCI to decode and exclude all occupied resources in the resource pool, and the rest unoccupied resources are available resources. Then UE carries on energy detection on all occupied resources, if the measured result of energy detection of a certain resource is less than a certain threshold, then the resource is available resource; conversely, if the measurement result of energy detection performed by the resource is greater than a certain threshold, the resource is an unavailable resource. The available resources obtained by the UE through SCI decoding and the available resources obtained through energy detection are all available resources of the UE. All available resources may be understood as resources to be used by the UE later, and all may also be considered as a set of candidate resources, i.e. a set of candidate resources.
In the LTE V2X technology, V2X only broadcasts one transmission mode, i.e., the resource pool is only used for broadcast services. Therefore, in the LTE V2X technology, only one energy detection threshold for determining available resources corresponds to a broadcast service. In the NR V2X technology, V2X may have three transmission modes, i.e., broadcast (broadcast), multicast (group) and unicast (unicast), and the three transmission modes may select resources in the same resource pool. One possible scenario is that V2X communication may exist in at least two transmission modes simultaneously. For example, in fig. 2, there is unicast or multicast traffic between UE1 and UE2, and broadcast traffic between UE1 and UE 3. Since the path loss (pathloss) of the communication between the UE1 and the UE2 is large and much larger than the path loss of the communication between the UE1 and the UE2, the power of the UE1 sending data to the UE2 is much smaller than the power of the UE3 broadcasting data to the UE1, and then the measurement result of the RSRP measurement in the listening process is smaller than the set RSRP threshold when the UE3 determines whether a resource, for example, the resource in which the UE1 sends information, can be used as a candidate resource. UE3 assumes that UE1 does not occupy a certain resource so that UE3 may select the same resource as UE1 for broadcast transmission, while in fact UE1 may occupy the certain resource, which may result in potentially interfering UE1 transmitting data to UE1, i.e., interfering with the transmission of data by UE 1.
In view of this, in the embodiment of the present application, different energy detection thresholds may be configured for different transmission modes, for example, the path loss of the communication link of the broadcast service is larger than the path loss of the path link of the unicast service, that is, the transmission power of the broadcast service for sending data is larger than the unicast service, so that the energy detection threshold corresponding to the broadcast may be higher than the energy detection threshold corresponding to the unicast. Therefore, even if at least two transmission modes exist, because the energy detection thresholds corresponding to different transmission modes are different, only one energy detection threshold exists at present, and therefore, the problem that the first terminal device determines the resource actually used by the second terminal device as a candidate resource, namely resource conflict, due to the fact that the difference value of the transmission power corresponding to different transmission modes is large can be avoided, and potential interference and resource conflict when a plurality of terminal devices send data are reduced.
The technical scheme provided by the embodiment of the application can be used for a wireless communication system, such as an NR system, a further evolution system based on LTE or NR, a future wireless communication system or other similar communication systems and the like.
The technical solution provided in the embodiment of the present application may be used in a communication system with a cellular link and a sidelink, for example, refer to fig. 4, which is a network architecture applied in the embodiment of the present application. Fig. 4 includes a network device and 2 terminal apparatuses (UE1 and UE2), where the 2 terminal apparatuses may be vehicle-mounted terminals and/or any other suitable devices for communicating over a wireless communication system, and the type of the terminal apparatuses is not limited in the embodiments of the present application. The 2 terminal devices can be connected to the network equipment and can communicate with the network equipment. The link between the terminal apparatus 1 and the network device may be a cellular link, the link between the terminal apparatus 2 and the network device may be a cellular link (illustrated by a solid line in fig. 4), and the link between the terminal apparatus 1 and the terminal apparatus 2 may be a sidelink (illustrated by a broken line in fig. 4). The architecture shown in fig. 4 is, of course, merely exemplary and fewer or more terminal devices may be used in fig. 4. The network device in fig. 4 may be a base station. The network device may correspond to different devices in different systems, for example, the fourth generation mobile communication technology (4G) system may correspond to the eNB, and the 5G system may correspond to the gNB.
The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.
An embodiment of the present application provides a communication method, please refer to fig. 5, which is a flowchart of the method. In the following description, the method is applied to the application scenario shown in fig. 2 or fig. 4 as an example. In addition, the method may be performed by two communication devices, e.g. a first communication apparatus and a second communication apparatus. Wherein the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, or the second communication device may be a network device or a communication device (e.g. a system-on-chip) capable of supporting the network device to implement the functions required by the method. The same is true for the second communication apparatus, which may be a terminal apparatus or a communication apparatus capable of supporting the terminal apparatus to implement the functions required by the method, or the second communication apparatus may be a network device or a communication apparatus (e.g., a system on chip) capable of supporting the network device to implement the functions required by the method. And the implementation manners of the first communication device and the second communication device are not limited, for example, the first communication device and the second communication device are both devices, or the first communication device is a terminal device, and the second communication device is a communication device capable of supporting the functions required by the network device to implement the method, and so on. The network device is, for example, a base station.
Referring to fig. 5, a flowchart of a communication method provided in an embodiment of the present application is shown, and in the following description, the method is executed by a network device and a terminal device, that is, a first communication device is a terminal device, and a second communication device is a network device. For example, if the method is applied to the network architecture shown in fig. 2 or fig. 4, the first communication device may be any one of the 3 terminal devices shown in fig. 2 or the 2 terminal devices shown in fig. 4, such as an in-vehicle device, or an RUS. The second communication device may be a network apparatus, such as a base station serving a terminal device. It should be noted that the embodiments of the present application are merely examples executed by a network device and a terminal device, and are not limited to such a scenario.
Specifically, referring to fig. 5, the flow of the method is described as follows.
S501, the network device sends first configuration information to the terminal device, and the terminal device receives the first configuration information, where the first configuration information is used to indicate at least one energy detection threshold.
It should be understood that the network device sending the first configuration information to the terminal device may be the network device generating the first configuration information and sending the first configuration information to the terminal device.
The energy detection threshold may be understood as a criterion by which the first terminal device determines whether the first resource used by the second terminal device to transmit the sidelink information is a candidate resource for the first terminal device to transmit information. For example, the first terminal device may be a candidate resource if it determines that the energy detection result of the first resource is less than the energy detection threshold. Here, the sidelink information may be data information, such as a physical sidelink shared channel (PSCCH), or control information, such as a Physical Sidelink Control Channel (PSCCH), and the embodiment of the present invention is not limited thereto. The energy detection threshold may be an RSRP threshold of the psch, an RSRP threshold of the PSCCH, an RSRQ threshold of the psch, an RSRQ threshold of the PSCCH, a Received Signal Strength Indicator (RSSI) threshold of the psch, or an RSSI threshold of the PSCCH, which is not limited in this embodiment of the present disclosure.
Considering that there are three transmission modes of unicast, broadcast and multicast in NR, the network device may configure energy detection thresholds for the three transmission modes respectively. That is, the first configuration information may be used to indicate at least one energy detection threshold, where the at least one energy detection threshold corresponds to a transmission mode in which the terminal device transmits the sidelink information on the first resource. Since the path loss of a communication link for broadcast traffic is larger than the path loss of a communication link for unicast or multicast traffic, the transmission mode can be characterized by the path loss from this viewpoint. For example, the downlink path loss corresponds to broadcast, and the sidelink path loss corresponds to unicast or multicast; alternatively, the downlink path loss corresponds to unicast and the sidelink path loss corresponds to broadcast or multicast. In some embodiments, the at least one energy detection threshold corresponds to a type of path loss for the terminal device to transmit the sidelink information on the first resource, which may include a downlink path loss and/or a sidelink path loss. It should be understood that the transmission method or the path loss type may be understood as a transmission parameter of the side information transmitted by the terminal device on the first resource.
In this embodiment, the network device may send the first configuration information to the terminal apparatus through signaling configuration. It should be noted that, in the embodiment of the present application, the signaling configuration includes: the RRC configuration information may be any one of the above signaling configurations, and is described below by taking RRC configuration information as an example.
The RRC configuration information may be configured by the network device according to the transmission parameter, and the first configuration information is implicitly associated or bound with the RRC configuration information. Different transmission parameters and different design manners of the first configuration information may be provided, and specific design manners of the first configuration information are described below by taking specific transmission parameters as transmission manners or path loss types as examples.
In some embodiments:
the transmission parameter is a transmission mode, and the first configuration information is used for indicating that at least one energy detection threshold may have the following different design modes:
(1) the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold and a third energy detection threshold, wherein the first energy detection threshold corresponds to broadcasting, the second energy detection threshold corresponds to unicasting, and the third energy detection threshold corresponds to multicasting.
The embodiment of the application can independently configure the energy detection threshold for different transmission modes respectively. For example, 3 energy detection thresholds may be predefined in the embodiment of the present application, where the 3 energy detection thresholds are energy detection threshold 1, energy detection threshold 2, and energy detection threshold 3, respectively. The energy detection threshold 1 represents a broadcast energy detection threshold, the energy detection threshold 2 represents a unicast energy detection threshold, and the energy detection threshold 3 represents a multicast energy detection threshold. The network device may send RRC signaling to the terminal apparatus for indicating a specific energy detection threshold. It should be noted that the number and the number of the energy detection thresholds are only for illustration and are not limited. For example, energy detection threshold 1 may represent a unicast energy detection threshold, energy detection threshold 2 may represent a multicast energy detection threshold, energy detection threshold 3 may represent a broadcast energy detection threshold, and so on.
In a possible implementation manner, the system may predefine a correspondence between at least one energy detection threshold and a transmission manner, for example, predefine an order in which the at least one energy detection threshold corresponds to the transmission manner to be broadcast, unicast, multicast; or, the sequence of the at least one energy detection threshold corresponding to the transmission mode is predefined to be unicast, broadcast, multicast, and the like. Therefore, the first terminal device can determine whether the first resource is the energy detection threshold to be adopted when the first resource is the candidate resource according to the first configuration information and the transmission mode used by the second terminal device for sending the sidelink information. It should be understood that the system predefined energy detection threshold may be agreed upon in the protocol or may be implicitly associated. For example, the energy detection threshold may also relate to a priority of the sideline information used by the first terminal device and the second terminal device for transmission, for example, the energy detection threshold may be a threshold for broadcast, multicast, and unicast at the corresponding priority.
(2) The at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or, the first energy detection threshold corresponds to broadcast, and the second energy detection threshold corresponds to unicast and multicast.
The difference from the design method in (1) above is that in the embodiment of the present application, two energy detection thresholds may be set, where the two energy detection thresholds correspond to three transmission modes, and two transmission modes of the three transmission modes multiplex one energy detection threshold. For example, the two energy detection thresholds are a first energy detection threshold and a second energy detection threshold. The first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or, the first energy detection threshold corresponds to broadcast, and the second energy detection threshold corresponds to unicast and multicast. According to the design scheme, two transmission modes of the three transmission modes multiplex one energy detection threshold, so that the network equipment can configure fewer energy detection thresholds, and therefore the RRC signaling overhead of the network equipment for sending the first configuration information is reduced.
It should be understood that the above designs (1) and (2) are direct indications of the energy detection threshold. The following provides a design way to indirectly indicate the energy detection threshold.
(3) The at least one energy detection threshold comprises a first energy detection threshold, and the first configuration information is further used for indicating at least one threshold offset; alternatively, the at least one energy detection threshold comprises a first energy detection threshold, the at least one threshold offset being predefined. By adopting the scheme, the first energy detection threshold corresponding to a certain transmission mode, such as unicast, is used as a reference, and other transmission modes, such as the energy detection threshold of broadcast or multicast, are indicated through the threshold offset, so that the RRC signaling overhead of the network equipment for sending the first configuration information can be reduced. It should be noted that at least one threshold offset is predefined, and the predefined manner may be agreed in the protocol or implicitly associated. For example, the at least one threshold offset may be related to a priority of the sideline information for transmission, and the energy detection threshold may be predefined based on the priority of the sideline information for transmission by the first terminal device and the second terminal device.
Illustratively, the first energy detection threshold corresponds to unicast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcast, and the second threshold offset corresponds to multicast; or, the first energy detection threshold corresponds to broadcast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to unicast, and the second threshold offset corresponds to multicast.
For example, the first energy detection threshold corresponds to a unicast, and the transmission mode used by the second terminal device to send the sideline information is a broadcast, so the first terminal device may determine the second energy detection threshold corresponding to the broadcast according to the first energy detection threshold and the first threshold offset. It should be appreciated that the first threshold offset may be an absolute value of a difference between the first energy detection threshold and the second energy detection threshold. The second energy detection threshold may be a difference between the first energy detection threshold and the first threshold offset, i.e., the first energy detection threshold minus the first threshold offset. Alternatively, the second energy detection threshold may be a sum of the first energy detection threshold and the first threshold offset, i.e., the sum of the first energy detection threshold and the first threshold offset. Similarly, the second threshold offset may be an absolute value of a difference between the first energy detection threshold and a multicast energy detection threshold, such as a third energy detection threshold. The third energy detection threshold may be a difference between the first energy detection threshold and the second threshold offset, that is, the difference is obtained by subtracting the second threshold offset from the first energy detection threshold; alternatively, the third energy detection threshold may be a sum of the first energy detection threshold and the second threshold offset, i.e. the sum of the first energy detection threshold and the second threshold offset.
In the embodiment of the present application, the first configuration information indicates two threshold offsets, which respectively correspond to two transmission modes other than the first transmission mode, and the RRC signaling overhead of the network device for sending the first configuration information can also be reduced.
Illustratively, the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; alternatively, illustratively, the first energy detection threshold corresponds to broadcast, and the at least one threshold offset comprises a first threshold offset, the first threshold offset corresponding to unicast and multicast.
Similarly, for example, if the first energy detection threshold corresponds to a unicast and the transmission mode used by the second terminal device to send the sideline information is a broadcast, the first terminal device may determine a second energy detection threshold corresponding to the broadcast according to the first energy detection threshold and the first threshold offset. It should be appreciated that the first threshold offset may be an absolute value of a difference between the first energy detection threshold and the second energy detection threshold. The second energy detection threshold may be a difference between the first energy detection threshold and the first threshold offset, that is, the first energy detection threshold minus the first threshold offset; alternatively, the second energy detection threshold may be the sum of the first energy detection threshold and the first threshold offset, i.e. the sum of the first energy detection threshold and the first threshold offset.
In the embodiment of the present application, the first configuration information indicates a threshold offset, that is, two transmission modes of the three transmission modes multiplex a threshold offset, which can further reduce RRC signaling overhead of the network device for sending the first configuration information.
In some embodiments:
as shown in fig. 2, the path loss taken by the UE3 to transmit information to the UE1 is the downlink path loss, i.e., the path loss between the terminal device and the network equipment, and the path loss taken by the UE1 to transmit information to the UE2 is the sidelink path loss, i.e., the path loss between the terminal device and the terminal device. In this scenario, the network device may configure corresponding energy detection thresholds for different types of path losses. In this scenario, the first configuration information is used to indicate at least one energy detection threshold in the following different design manners:
(4) the at least one energy detection threshold includes a first energy detection threshold corresponding to a sidelink path loss and a second energy detection threshold corresponding to a downlink path loss.
According to the embodiment of the application, respective energy detection thresholds can be configured independently for different types of path loss respectively. For example, in the embodiment of the present application, 2 energy detection thresholds may be predefined, where the 2 energy detection thresholds are an energy detection threshold 1 and an energy detection threshold 2, respectively. The energy detection threshold 1 corresponds to the side link path loss, and the energy detection threshold 2 corresponds to the downlink path loss. The network device may send RRC signaling to the terminal apparatus for indicating a specific energy detection threshold. The RRC signaling may be transmitted over a link for the network device to communicate with the terminal device or over a link for sidelink communications. It should be noted that the number and the number of the energy detection thresholds are only for illustration and are not limited. For example, energy detection threshold 1 may correspond to a downlink path loss and energy detection threshold 2 may correspond to a sidelink path loss.
In a possible implementation, the system may pre-define a correspondence between at least one energy detection threshold and a path loss type, for example, pre-define an order of the path loss type corresponding to at least one energy detection as a sidelink path loss and a downlink path loss; or, the order of the path loss types corresponding to the at least one energy detection is predefined as downlink path loss and sidelink path loss. Thus, the first terminal device can determine whether the first resource is the energy detection threshold to be adopted when the first resource is the candidate resource according to the first configuration information and the type of the path loss used by the second terminal device for transmitting the sidelink information.
It should be understood that the design manner of the above (4) is a design manner of direct indication of the energy detection threshold. The following provides a design way to indirectly indicate the energy detection threshold.
(5) The at least one energy detection threshold comprises a first energy detection threshold, the first configuration information is further used for indicating a threshold offset, the first energy detection threshold is a downlink path loss threshold, and the threshold offset is a difference value between the first energy detection threshold and a sidelink path loss energy detection threshold; or, the at least one energy detection threshold includes a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is a threshold of a side link path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of a downlink path loss.
The difference from the design manner of (4) above is that, in the embodiment of the present application, a first energy detection threshold corresponding to a certain path loss type, for example, a downlink path loss is used as a reference, and an energy detection threshold of a sidelink path loss is indicated by a threshold offset, which can also reduce RRC signaling overhead of the network device for sending the first configuration information.
It is to be understood that the threshold offset in (5) may be an absolute value of a difference of the energy detection threshold for the sidelink path loss and the energy detection threshold for the downlink path loss. For example, the first energy detection threshold is a downlink path loss threshold, and the energy detection threshold for the sidelink path loss may be a difference between the first energy detection threshold and a threshold offset; alternatively, the energy detection threshold for the sidelink path loss may be a sum of the first energy detection threshold and a threshold offset.
In some embodiments:
the terminal device may employ the maximum transmit power for the sidelink transmission. For example, in the Mode1 scenario, the network device instructs the terminal apparatus to perform sidelink transmission with the maximum transmit power through a Transmit Power Control (TPC) field in Downlink Control Information (DCI). In the Mode2 scenario, the network device may instruct the terminal apparatus to perform sidelink transmission with the maximum transmit power by configuring the target power and the path loss compensation parameter. In consideration of such application scenarios, the embodiment of the present application may configure the maximum transmission power by the transmission mode, which may be understood as using the maximum transmission power to represent the transmission mode.
In some embodiments, the second configuration information is used to indicate at least one energy detection threshold in the following different design manners:
(6) the at least one maximum transmit power includes a first maximum transmit power, a second maximum transmit power, and a third maximum transmit power, the first maximum transmit power corresponds to broadcast, the second maximum transmit power corresponds to unicast, and the third maximum transmit power corresponds to multicast.
The embodiment of the application can independently configure the maximum transmitting power for different transmission modes respectively. For example, the embodiment of the present application may predefine 3 maximum transmission powers, where the 3 maximum transmission powers are maximum transmission power 1, maximum transmission power 2, and maximum transmission power 3, respectively. Wherein, the maximum transmission power 1 represents the maximum transmission power of broadcasting, the maximum transmission power 2 represents the maximum transmission power of unicasting, and the maximum transmission power 3 represents the maximum transmission power of multicasting. The network device may send RRC signaling to the terminal apparatus for indicating a specific maximum transmit power. It should be noted that the number and the number of the maximum transmission power are merely for illustration and are not limited. For example, maximum transmit power of 1 may represent the maximum transmit power for unicast, maximum transmit power of 2 may represent the maximum transmit power for multicast, maximum transmit power of 3 may represent the maximum transmit power for broadcast, and so on. It should be understood that the system predefined maximum transmit power may be agreed upon in the protocol or may be implicitly associated. For example, the maximum transmission power is also related to the priority of the sidelink information used by the first terminal device and the second terminal device for transmission, e.g., the maximum transmission power is a threshold for broadcast, multicast and unicast at the corresponding priority.
In a possible implementation manner, the system may predefine a correspondence between at least one maximum transmission power and a transmission manner, for example, predefine an order of correspondence between at least one maximum transmission power and a transmission manner to be broadcast, unicast, multicast; or, predefining at least one sequence corresponding to the maximum transmission power and the transmission mode to be unicast, broadcast and multicast; and so on. Thus, the first terminal device can obtain the corresponding maximum transmission power according to the first configuration information and the transmission mode used by the second terminal device for sending the sideline information.
(7) The at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to unicast, and the second maximum transmission power corresponds to broadcast and multicast; or the first maximum transmission power corresponds to broadcast and the second maximum transmission power corresponds to unicast and multicast.
The difference from the design manner in (6) above is that in the embodiment of the present application, two maximum transmission powers may be set, where the two maximum transmission powers correspond to three transmission manners, and two transmission manners of the three transmission manners multiplex one maximum transmission power. For example, the two maximum transmit powers are a first maximum transmit power and a second maximum transmit power. The first maximum transmitting power corresponds to unicast, and the second maximum transmitting power corresponds to broadcast and multicast; or the first maximum transmission power corresponds to broadcast and the second maximum transmission power corresponds to unicast and multicast. According to the design scheme, two transmission modes of the three transmission modes multiplex one maximum transmission power, so that the network equipment configures less maximum transmission power, and the RRC signaling overhead of the network equipment for sending the first configuration information can be reduced.
It should be understood that the designs of (6) and (7) above are direct indications of the maximum transmit power. The following provides a design for indirectly indicating the maximum transmit power.
(8) The at least one maximum transmit power comprises a first maximum transmit power, the first configuration information further indicating at least one transmit power offset; alternatively, the at least one maximum transmit power comprises a first maximum transmit power, and the system predefines at least one transmit power offset. By adopting the scheme, the first maximum transmission power corresponding to a certain transmission mode, such as unicast, is taken as a reference, and the maximum transmission power of other transmission modes, such as broadcast or multicast, is indicated through the transmission power offset, so that the RRC signaling overhead of the network equipment for sending the first configuration information can be reduced. It should be noted that at least one transmit power offset is predefined, and the predefined manner may be agreed in the protocol or implicitly associated. For example, the at least one transmit power offset may be associated with a priority of the sidelink information for transmission, and the transmit power threshold may be predefined based on the priority of the sidelink information for transmission by the first terminal device and the second terminal device.
Illustratively, the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or the first maximum transmission power corresponds to a broadcast, the at least one transmission power offset includes a first transmission power offset and a second transmission power offset, the first transmission power offset corresponds to a unicast, and the second transmission power offset corresponds to a multicast.
For example, if the first maximum transmission power corresponds to unicast and the transmission mode used by the second terminal device to transmit the sidelink information is broadcast, the first terminal device may determine the second maximum transmission power corresponding to broadcast according to the first maximum transmission power and the first transmission power offset. It is to be understood that the first transmit power offset may be an absolute value of a difference of the first maximum transmit power and the second maximum transmit power. The second maximum transmit power may be a difference between the first maximum transmit power and the first transmit power offset, i.e., the first maximum transmit power minus the first transmit power offset. Alternatively, the second maximum transmission power may be a sum of the first maximum transmission power and the first transmission power offset, i.e. the first maximum transmission power plus the first transmission power offset. Similarly, the second transmit power offset may be an absolute value of a difference between the first maximum transmit power and a maximum transmit power for the multicast, e.g., a third maximum transmit power. The third maximum transmission power may be a difference between the first maximum transmission power and the second transmission power offset, that is, the first maximum transmission power minus the second transmission power offset; alternatively, the third maximum transmit power may be a sum of the first maximum transmit power and the second transmit power offset, i.e., the first maximum transmit power plus the second transmit power offset.
In the embodiment of the present application, the first configuration information indicates two transmission power offsets, which respectively correspond to two transmission modes other than the first transmission mode, and the RRC signaling overhead of the network device for sending the first configuration information can also be reduced.
Illustratively, the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast and multicast; or, illustratively, the first maximum transmit power corresponds to broadcast, and the at least one transmit power offset includes a first transmit power offset, the first transmit power offset corresponding to unicast and multicast.
Similarly, for example, if the first maximum transmission power corresponds to unicast and the transmission mode used by the second terminal device to transmit the sidelink information is broadcast, the first terminal device may determine a second maximum transmission power corresponding to broadcast according to the first maximum transmission power and the first transmission power offset. It is to be understood that the first transmit power offset may be an absolute value of a difference of the first maximum transmit power and the second maximum transmit power. The second maximum transmission power may be a difference between the first maximum transmission power and the first transmission power offset, that is, the first maximum transmission power minus the first transmission power offset; alternatively, the second maximum transmission power may be a sum of the first maximum transmission power and the first transmission power offset, i.e. the first maximum transmission power plus the first transmission power offset.
In the embodiment of the present application, the first configuration information indicates one transmission power offset, that is, two transmission modes of the three transmission modes multiplex one transmission power offset, so that the RRC signaling overhead of the network device for sending the first configuration information can be further reduced.
In the third embodiment, that is, in a scenario where the terminal device performs sidelink transmission by using the maximum transmission power, or in a scenario where the network device configures the maximum transmission power according to the transmission mode, the first configuration information may indicate the first energy detection threshold, that is, the first configuration information includes 1 energy detection threshold. For the first terminal device, an energy detection threshold corresponding to a transmission mode used by the second terminal device may be determined based on at least one maximum transmission power configured by the network equipment and the first energy detection threshold. Specific examples of this section are described below.
S502, the network device sends second configuration information to the terminal device, and the terminal device receives the second configuration information, where the second configuration information may be used to indicate at least one maximum transmission power.
If the network device adopts the design schemes of the first embodiment and the second embodiment, S502 is not necessary, and is illustrated by a dotted line in fig. 5.
In the embodiment of the present application, the first configuration information or the second configuration information may be carried in Radio Resource Control (RRC) signaling. It can be understood that the first configuration information or the second configuration information may also be carried in other messages, which is not limited in this embodiment of the application.
In a possible embodiment, the energy detection threshold may be a specific value. Or the first configuration information may be a configuration table, which may be a table, which may indicate at least one energy detection threshold. Or the first configuration information may include a plurality of configuration tables, and one configuration table corresponds to one transmission parameter or a plurality of transmission parameters. For example, the first configuration information may include three configuration tables, which are a first table, a second table and a third table, respectively, where the first table corresponds to unicast, the second table corresponds to broadcast, and the third table corresponds to multicast. For another example, the first configuration information may include two configuration tables, which are a first table and a second table, respectively, where the first table corresponds to unicast and the second table corresponds to broadcast and multicast. Alternatively, the first configuration information is a table, and the table may indicate priorities of the sideline information respectively used by the first terminal device and the second terminal device for transmission, so as to implicitly indicate an energy detection threshold corresponding to the priorities. For example, there are a priority of the first information and a priority of the second information, for example, the first value in the table corresponds to the priority of the specific first information, and the second value in the first table corresponds to the priority of the second information.
It should be understood that the second configuration information, like the first configuration information, may also be a specific value including at least one maximum transmission power, and may also include at least one configuration table.
S503, the first terminal device detects a transmission parameter for the second terminal device to transmit the sideline information on the first resource.
S504, the first terminal device determines whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information.
In one application scenario, there are a plurality of terminal devices that can perform sidelink communications. As shown in fig. 2, the UE3 may be in sidelink communication with the UE1 or the UE2, and the UE1 may also be in sidelink communication with the UE 2. The transmission method adopted by the UE1, the UE2 and the UE3 to transmit the sideline information may be unicast, multicast or broadcast, for example, the UE1 and the UE2 transmit the sideline information in a unicast or multicast mode, and the UE3 and the UE1 transmit the sideline information in a broadcast mode. Alternatively, the path loss taken by the UE1, UE2, and UE3 to transmit the sidelink information may be a downlink path loss or a sidelink path loss. Hereinafter, the path loss taken by the UE3 to transmit the sidelink information to the UE1 is the downlink path loss, and the path loss taken by the UE1 to transmit the information to the UE2 is the sidelink path loss.
Any one of the plurality of terminal apparatuses, for example, the first terminal apparatus, may detect a transmission parameter from another terminal apparatus, for example, the second terminal apparatus, in a listening window (listening window) before transmitting the sidelink information to determine whether the first resource for the second terminal apparatus to transmit the sidelink information is available, that is, whether the first resource is a candidate resource for the first terminal apparatus to transmit the sidelink information.
In one possible implementation, the information for indicating the transmission parameters of the second terminal device is referred to as, for example, first indication information, which may be carried in first control information, e.g., SCI. The first terminal device detects the SCI from the second terminal device in the listening window, and may obtain the first indication information in the SCI, thereby determining the transmission parameters of the second terminal device for transmitting the sideline information.
As an alternative implementation, the first control information is a first-level SCI, and the first indication information is a second-level SCI format, where the second-level SCI format corresponds to a transmission mode. The first terminal device detects the SCI from the second terminal device in the listening window, can obtain the second-level SCI format carried in the first-level SCI, and determines the transmission parameters of the sideline information sent by the second terminal device according to the second-level SCI format.
In other possible implementations, the first terminal device may determine the transmission parameter of the second terminal device sending the sidelink information by one or more of the following combinations:
(1) the network equipment configures the side link path loss and/or the downlink path loss for the second terminal equipment through the RRC configuration information, and the first terminal device determines the path loss type of the side information transmitted by the second terminal device by receiving the RRC configuration information. The RRC configuration information may be configured by the network device according to a transmission mode, and the first configuration information is implicitly associated or bound with the RRC configuration information. For example, if the transmission parameter is a path loss type, the path loss type is associated or bound with the transmission mode, and the corresponding relationship may be configured through physical layer signaling, RRC signaling, or agreed in a protocol, or implicitly associated. Illustratively, broadcast corresponds to downlink path loss, unicast and multicast corresponds to sidelink path loss; or, the broadcast and multicast correspond to the downlink path loss, and the unicast corresponds to the sidelink path loss; or, broadcasting corresponding side link path loss, unicasting and multicasting corresponding downlink path loss; alternatively, broadcast and multicast correspond to sidelink path loss and unicast corresponds to downlink path loss.
In another possible implementation, the pathloss type is associated or bound with the transmission mode, and the corresponding relationship may be configured through physical layer signaling, RRC signaling, or agreed in a protocol, or implicitly associated, for example: broadcasting corresponding downlink path loss, and unicasting and multicasting corresponding side link path loss; or, the broadcast and multicast correspond to the downlink path loss, and the unicast corresponds to the sidelink path loss; or, broadcasting corresponding side link path loss, unicasting and multicasting corresponding downlink path loss; alternatively, broadcast and multicast correspond to sidelink path loss and unicast corresponds to downlink path loss.
(2) The network equipment sends DCI to the first terminal device, and the information of the TPC domain of the DCI can be used for indicating the transmission parameters of the side row information sent by the second terminal device, so that the first terminal device receives the DCI and determines the transmission parameters of the side row information sent by the second terminal device according to the information of the TPC domain in the DCI.
(3) The network equipment sends an RRC signaling to the first terminal device, the RRC signaling can indicate target power and a path loss compensation parameter, the first terminal device receives the RRC signaling, and a transmission parameter of the second terminal device sending the sideline information can be determined according to the target power and the path loss compensation parameter.
(4) The second terminal device may report the path loss type, or one or more combinations of RSRP, RSRQ, or RSSI information to the network device, or the second terminal device may broadcast the path loss type, or one or more combinations of RSRP, RSRQ, or RSSI information, so that the first terminal device receives the path loss type, or one or more combinations of RSRP, RSRQ, or RSSI information reported or broadcast by the second terminal device, and determines the transmission parameter of the side information sent by the second terminal device.
The first terminal device determines a transmission parameter of the second terminal device sending side information, and may determine an energy detection threshold corresponding to the determined transmission parameter according to the first configuration information, or according to the first configuration information and the second configuration information, and then determine whether the first resource is a candidate resource according to the determined energy detection threshold.
Specifically, the first terminal device performs energy detection on the first resource, for example, the first terminal device performs RSRP measurement, RSRQ measurement, or RSSI measurement on the first resource, so as to obtain a measurement result. If the energy detection on the first resource is greater than or equal to the threshold corresponding to the transmission parameter, the first resource is not a candidate resource; conversely, the first resource is a candidate resource if the energy detection on the first resource is less than a threshold corresponding to the transmission parameter. Or, if the energy detection on the first resource is greater than the threshold corresponding to the transmission parameter, the first resource is not a candidate resource; conversely, the first resource is a candidate resource if the energy detection on the first resource is less than or equal to a threshold corresponding to the transmission parameter.
For ease of understanding, a specific scheme for determining whether the first resource is a candidate resource by the first terminal device will be described below with reference to the above-mentioned designs of the first configuration information and the second configuration information, where the first terminal device is UE3 in fig. 2 and the second terminal device is UE1 in fig. 2.
Taking the example that the transmission mode between the UE3 and the UE1 is broadcast, and the transmission mode between the UE1 and the UE2 is unicast or multicast, specific schemes for the first terminal device to determine whether the first resource is a candidate resource may include the following several:
(1) the first configuration information comprises an energy detection threshold 1, an energy detection threshold 2 and an energy detection threshold 3, wherein the energy detection threshold 1 corresponds to broadcast, the energy detection threshold 2 corresponds to unicast, and the energy detection threshold 3 corresponds to multicast.
For example, the UE3 detects, e.g., an SCI from the UE1 during the listening window, and determines from the SCI that the transmission parameters of the UE1 are, e.g., unicast. The UE3 may determine the energy detection threshold corresponding to unicast as energy detection threshold 2 according to the first configuration information. The UE3 performs energy detection on the first resource, and if the obtained measurement result is greater than or equal to the energy detection threshold 2, the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than the energy detection threshold of 2, then the UE3 determines that the first resource may be a candidate resource. In some embodiments, the UE3 performs energy detection on the first resource, and if the obtained measurement result is greater than an energy detection threshold of 2, the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than or equal to the energy detection threshold 2, the UE3 determines that the first resource may be a candidate resource.
As another example, the UE3 may detect, for example, an SCI from the UE1 during the listening window, and may determine, for example, that the transmission parameter of the UE1 is multicast based on the SCI. The UE3 may determine the energy detection threshold corresponding to the multicast as energy detection threshold 3 according to the first configuration information. The UE3 performs energy detection on the first resource, and if the obtained measurement result is greater than or equal to the energy detection threshold 3, the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than the energy detection threshold of 3, the UE3 determines that the first resource may be a candidate resource. In some embodiments, the UE3 performs energy detection on the first resource, and if the obtained measurement result is greater than an energy detection threshold of 3, the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than or equal to the energy detection threshold 3, the UE3 determines that the first resource may be a candidate resource.
Even if the power of the UE1 for sending the sidelink information to the UE2 is smaller than the power of the UE3 for sending the sidelink information to the UE1, in this embodiment of the present application, the measurement result obtained by the UE3 measuring the first resource is compared with the energy detection threshold 2 or the energy detection threshold 3, and compared with the existing broadcast, that is, only one energy detection threshold exists, the probability that the measurement result detected by the UE3 is smaller than the set energy detection threshold is smaller, so that it can be avoided that the UE3 considers the first resource as a candidate resource, that is, the UE3 and the UE1 use the same resource to send the sidelink information.
It should be understood that the foregoing example is only an illustration, where the energy detection threshold 1 may also correspond to a unicast, the energy detection threshold 2 may correspond to a multicast, and the energy detection threshold 3 corresponds to a broadcast, which is not limited to this embodiment of the present application.
(2) The first configuration information comprises an energy detection threshold 1 and an energy detection threshold 2, wherein the energy detection threshold 1 corresponds to broadcast, and the energy detection threshold 2 corresponds to unicast and multicast.
Similar to (1), please see (1) for duplicates. In (2), the UE3 determines, according to the SCI, that the transmission parameter of the UE1 is, for example, unicast, and further may determine, according to the first configuration information, that the energy detection threshold corresponding to unicast is energy detection threshold 2. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. E.g., if the measurement is greater than or equal to the energy detection threshold 2, then the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than the energy detection threshold 2, the UE3 determines that the first resource may be a candidate resource. It should be appreciated that in some embodiments, if the measurement is greater than the energy detection threshold 2, then the UE3 determines that the first resource is not a candidate resource; conversely, if the measurement is less than or equal to the energy detection threshold 2, the UE3 determines that the first resource may be a candidate resource.
(3) The first configuration information comprises an energy detection threshold 1, a threshold offset 1 and a threshold offset 2, wherein the energy detection threshold 1 corresponds to broadcasting, the threshold offset 1 corresponds to unicasting, and the threshold offset 2 corresponds to multicasting.
Similar to (1), please see (1) for duplicates. In (3), the UE3 determines, according to the SCI, that the transmission parameter of the UE1 is, for example, unicast, and further may determine, according to the first configuration information, an energy detection threshold 2 corresponding to unicast, where, for example, the energy detection threshold 2 is a difference or sum of an energy detection threshold 1 and a threshold offset 1. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
(4) The first configuration information includes an energy detection threshold 1 and a threshold offset 1, where the energy detection threshold 1 corresponds to broadcast and the threshold offset 1 corresponds to unicast and multicast.
Similar to (3), please see (3) for duplicates. In (4), the UE3 determines, according to the SCI, that the transmission parameter of the UE1 is, for example, multicast, and further may determine, according to the first configuration information, an energy detection threshold 2 corresponding to the multicast, where, for example, the energy detection threshold 2 is a difference value or a sum value between an energy detection threshold 1 and a threshold offset 1. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
Taking the path loss between the UE3 and the UE1 as the downlink path loss and the path loss between the UE1 and the UE2 as the sidelink path loss as an example, specific schemes for the first terminal device to determine whether the first resource is a candidate resource may include the following several:
(5) the first configuration information includes an energy detection threshold 1 and an energy detection threshold 2, where the energy detection threshold 1 corresponds to a downlink path loss, and the energy detection threshold 2 corresponds to a sidelink path loss.
For example, the network device may send RRC signaling to the first terminal apparatus, where the RRC signaling may indicate the target power and path loss compensation parameters, and the UE3 may determine the transmission parameter of the UE1 as, for example, the sidelink path loss according to the target power and path loss compensation parameters. The UE3 may determine the energy detection threshold corresponding to the sidelink path loss as energy detection threshold 2 according to the first configuration information. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
It should be understood that the foregoing example is only an illustration, and the energy detection threshold 1 may also correspond to the sidelink path loss, and the energy detection threshold 2 may also correspond to the downlink path loss, which is not limited in this application.
It should be understood that, in (5), taking the example that the UE3 determines the transmission parameters of the UE1 according to the target power and the path loss compensation parameters, the embodiment of the present application is not limited thereto, and for example, the UE3 may also determine the transmission parameters of the UE1 according to the above information of the TPC domain of, for example, the DIC.
(6) The first configuration information includes an energy detection threshold 1 and a threshold offset 1, where the energy detection threshold 1 corresponds to a downlink path loss and the threshold offset 1 corresponds to a sidelink path loss.
Similar to (5), please see (5) for duplicates. In (6), the UE3 determines, according to the SCI, that the transmission parameter of the UE1 is, for example, the sidelink path loss, and further may determine, according to the first configuration information, an energy detection threshold corresponding to the sidelink path loss, for example, the energy detection threshold 2 is a difference value or a sum value of the energy detection threshold 1 and a threshold offset 1. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
(7) The first configuration information comprises an energy detection threshold 1, the energy detection threshold 1 corresponds to broadcasting, the second configuration information comprises maximum transmission power 1, maximum transmission power 2 and maximum transmission power 3, the maximum transmission power 1 corresponds to broadcasting, the maximum transmission power 2 corresponds to unicast, and the maximum transmission power 3 corresponds to multicast.
For example, the UE3 detects, e.g., an SCI from the UE1 during the listening window, and determines from the SCI that the transmission parameters of the UE1 are unicast. The UE3 may determine the maximum transmit power corresponding to unicast to be maximum transmit power 2 according to the second configuration information. The UE3 may determine an offset to the energy detection threshold corresponding to unicast, i.e., the difference between maximum transmit power 2 and maximum transmit power 1. The UE3 determines an energy detection threshold 2 corresponding to the unicast according to the energy detection threshold 1 and the offset of the energy detection threshold, where the energy detection threshold 2 may be the offset of the energy detection threshold 1 minus the energy detection threshold, or the energy detection threshold 2 may also be the offset of the energy detection threshold 1 plus the energy detection threshold. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
It should be understood that the foregoing example is only an illustration, where the energy detection threshold 1 may also correspond to a unicast, the energy detection threshold 2 may correspond to a multicast, and the energy detection threshold 3 corresponds to a broadcast, which is not limited to this embodiment of the present application.
(8) The first configuration information comprises an energy detection threshold 1, the energy detection threshold 1 corresponds to broadcasting, the second configuration information comprises maximum transmission power 1 and maximum transmission power 2, the maximum transmission power 1 corresponds to broadcasting, and the maximum transmission power 2 corresponds to unicast and multicast.
Similar to (7), please refer to (7) for duplicates. In (8), the UE3 detects, for example, an SCI from the UE1 during the listening window, from which it is determined that the transmission parameters of the UE1 are, for example, unicast. The UE3 may determine the maximum transmit power corresponding to unicast to be maximum transmit power 2 according to the second configuration information. The UE3 may determine an offset to the energy detection threshold corresponding to unicast, i.e., the difference between maximum transmit power 2 and maximum transmit power 1. The UE3 determines an energy detection threshold 2 corresponding to the unicast according to the energy detection threshold 1 and the offset of the energy detection threshold, where the energy detection threshold 2 may be the offset of the energy detection threshold 1 minus the energy detection threshold, or the energy detection threshold 2 may also be the offset of the energy detection threshold 1 plus the energy detection threshold. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
(9) The first configuration information comprises an energy detection threshold 1, the energy detection threshold 1 corresponds to broadcasting, the second configuration information comprises maximum transmission power 1, transmission power offset 1 and transmission power offset 2, the maximum transmission power 1 corresponds to broadcasting, the transmission power offset 1 corresponds to unicasting, and the transmission power offset 2 corresponds to multicasting.
Similar to (7), please refer to (7) for duplicates. In (9), the UE3 detects, for example, an SCI from the UE1 during the listening window, from which it is determined that the transmission parameters of the UE1 are, for example, unicast. The UE3 may determine the corresponding transmit power offset 1 for the unicast according to the second configuration information. The UE3 determines an energy detection threshold 2 corresponding to unicast according to the energy detection threshold 1 and the transmission power offset 1, where the energy detection threshold 2 may be the energy detection threshold 1 minus the transmission power offset 1, or the energy detection threshold 2 may also be the energy detection threshold 1 plus the transmission power offset 1. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
(10) The first configuration information comprises an energy detection threshold 1, the energy detection threshold 1 corresponds to broadcast, the second configuration information comprises maximum transmission power 1 and transmission power offset 1, the maximum transmission power 1 corresponds to broadcast, and the transmission power offset 1 corresponds to unicast and multicast.
Similar to (9), please see (9) for duplicates. In (10), the UE3 detects, for example, an SCI from the UE1 during the listening window, from which it is determined that the transmission parameters of the UE1 are, for example, unicast. The UE3 may determine the corresponding transmit power offset 1 for the unicast according to the second configuration information. The UE3 determines an energy detection threshold 2 corresponding to unicast according to the energy detection threshold 1 and the transmission power offset 1, where the energy detection threshold 2 may be the energy detection threshold 1 minus the transmission power offset 1, or the energy detection threshold 2 may also be the energy detection threshold 1 plus the transmission power offset 1. The UE3 performs energy detection on the first resource and compares the measurement result with an energy detection threshold 2, and determines whether the first resource is a candidate resource according to the comparison result. It should be understood that the determination result is similar to (2), and is not described in detail herein.
Further, the embodiment of the application can adjust the energy detection threshold. For example, if the total number of all available resources determined by the first terminal device is less than, for example, 20% of all resources in the resource pool, the current energy detection threshold may be increased at intervals with a step size of, for example, 3dB until the total number of all available resources is greater than or equal to 20% of all resources.
Through the above scheme in the embodiment of the present application, in a scenario that at least two transmission modes or two path loss types may exist at the same time in communication of V2X, the first terminal device may determine whether the first resource is a candidate resource, so as to reduce potential interference and resource collision when multiple terminal devices transmit data.
In the NR system, 3 Modulation and Coding Scheme (MCS) index tables are supported, for example, table 1(table 5.1.3.1-1: MCS index table1 for PDSCH), table2(table 5.1.3.1-2: MCS index table2 for PDSCH) and table3(table 5.1.3.1-3: MCS index table3 for PDSCH) are currently used, and the 3 tables correspond to different modulation schemes. I.e., each table may indicate values for multiple MCSs. The network equipment configures an MCS index value from which the terminal device can determine an MCS from the table. For example, the value range of the MCS index IMCS of table1 and table3 is 0-31, the IMCS is in the range of 0-28, the MCS has a determined value, the value of the IMCS is in the range of 29-31, and the reserved (reserved) state is corresponded; the IMCS of table2 is in the range of 0-27, the MCS has a definite value, the range value of IMCS is in the range of 28-31, corresponding to reserved state.
In the NR V2X system, a configuration method supporting multiple MCSs is discussed, but there is no scheme of how a network device indicates an MCS for a terminal apparatus.
In view of this, embodiments of the present application provide a communication method, by which a network device may explicitly instruct a terminal device to adopt one of multiple supported MCS configurations.
The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.
An embodiment of the present application provides a communication method, please refer to fig. 6, which is a flowchart of the method. In the following description, the method is applied to the application scenario shown in fig. 2 or fig. 4 as an example. In addition, the method may be performed by two communication devices, e.g. a first communication apparatus and a second communication apparatus. Wherein the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, or the second communication device may be a network device or a communication device (e.g. a system-on-chip) capable of supporting the network device to implement the functions required by the method. The same is true for the second communication apparatus, which may be a terminal apparatus or a communication apparatus capable of supporting a function required by the terminal apparatus to implement the method, or a network device or a communication apparatus (e.g., a system-on-chip) capable of supporting a function required by the network device to implement the method. And the implementation manners of the first communication device and the second communication device are not limited, for example, the first communication device and the second communication device are both devices, or the first communication device is a terminal device, and the second communication device is a communication device capable of supporting the functions required by the network device to implement the method, and so on. The network device is, for example, a base station.
Referring to fig. 6, a flowchart of a communication method provided in an embodiment of the present application is shown, and in the following description, the method is executed by a network device and a terminal device, that is, a first communication device is a terminal device, and a second communication device is a network device. For example, if the method is applied to the network architecture shown in fig. 2 or fig. 4, the first communication device may be any one of the 3 terminal devices shown in fig. 2 or the 2 terminal devices shown in fig. 4, such as an in-vehicle device, or an RUS. The second communication device may be a network apparatus, such as a base station serving a terminal device. It should be noted that the embodiments of the present application are merely examples executed by a network device and a terminal device, and are not limited to such a scenario.
Specifically, referring to fig. 6, the flow of the method is described as follows.
S601, the network device sends first indication information to the terminal device, and the terminal device receives the first indication information, where the first indication information is used to indicate a first determination method of the multiple determination methods of MCS.
It should be understood that the network device sends the first indication information to the terminal device, and may be the network device generating the first indication information and sending the first indication information to the terminal device.
The first indication information may be used to indicate one of a plurality of determination manners of the MCS. In the NR V2X system, a plurality of MCS configurations are supported. The embodiment of the application can indicate one of the plurality of configuration modes through the first indication information. It should be understood that the manner of determination may also be understood as a manner of configuration.
In the embodiment of the present application, a determination method supporting three MCSs is taken as an example, and the three determination methods include, for example, a determination method 1, a determination method 2, and a determination method 3. The first determination manner may be determination manner 1, determination manner 2, or determination manner 3. The determination method 1 may be, for example, a method in which one determined MCS index is configured for the terminal apparatus. The determination method 2 may be, for example, a method in which the terminal apparatus autonomously selects an MCS within the entire MCS index range. The determination mode 3 may be, for example, a mode in which the terminal apparatus autonomously selects an MCS within an MCS index range configured by the network device, for example, a first index range, which is a subset of the index ranges of all MCSs. The first index range may be predefined or may be a selectable range of network equipment configured MCS indices within which the terminal device autonomously selects an MCS.
In a possible implementation manner, the first indication information may be carried in DCI, and specifically, the first indication information may be carried in an MCS field of the downlink control information DCI, and a first determination manner of the MCS is indicated by a value of a reserved bit of the MCS field, where the first determination manner is the determination manner 1, the determination manner 2, or the determination manner 3.
For example, the index of the MCS field of table1 and table3 is 0 to 28, the MCS has a certain value, the index of the MCS field of table2 is 0 to 27, the index of the MCS has a certain value, the index of the MCS field of table1 or table3 is 29 to 31, and may indicate the determination method 1, the determination method 2 or the determination method 3, and the index of the MCS field of table1 or table3 is 28 to 31, and may indicate the determination method 1, the determination method 2 or the determination method 3.
Illustratively, the index value corresponding to the reserved bit of the MCS field is 31, which indicates the above determination mode2, that is, indicates the terminal device to autonomously select the value of the MCS in the entire MCS index range. For example, for table1 or table3, the total MCS index range is 0 to 28, and then the value of the reserved bit in the MCS field indicates the end device to select the value of the MCS within 0 to 28; for Table2, the index range of all MCSs is 0-27, and the value of the reserved bits in the MCS field indicates the terminal device to select the value of MCS within 0-27.
In contrast, the index value corresponding to the reserved bit of the MCS field is 30, which may indicate the above determination mode 3, that is, indicate the terminal device to select the value of the MCS within the first index range configured by the network device. The first index range may be configured by the network device through RRC signaling, for example, the first index range may be the full MSC index range. Alternatively, the first index range is predefined, e.g., the predefined first index range is the full MCS index range, or the full index range includes a first portion and a second portion, the first index range may be the first portion or the second portion thereof, the first portion may be the portion with the smaller MCS index, and the second portion may be the portion with the larger MCS index. Alternatively, the first index range may be a range composed of odd-numbered parts of the entire MCS index ranges, and may correspond to the first part. Alternatively, the first index range may be a range composed of even-numbered parts of the entire MCS index range, and may correspond to the second part. Alternatively, the predefined first index range is associated with a transmission mode or a service priority, for example, unicast corresponds to the first part, multicast broadcast corresponds to the second part, a service with a high priority corresponds to the first part, and a service with a low priority corresponds to the second part. Alternatively, the predefined first index range is associated with a transmission mode or a service priority, for example, multicast broadcast corresponds to the first part, unicast corresponds to the second part, service with low priority corresponds to the first part, and service with high priority corresponds to the second part.
In contrast, the index value corresponding to the reserved bit of the MCS field is 29 or 28, which indicates the above determination mode1, that is, indicates that the MCS used by the terminal device is the MCS selected by the network device.
Therefore, the design scheme does not need to modify the value range and the index of the MCS in the DCI, can be compatible with the specification of the current protocol, and can realize the determination mode2 and the determination mode 3 which support the new addition.
It should be understood that the above corresponding relationship between the value of the reserved bits in the MCS field and the number of the determination method is merely an illustration. In some embodiments, the index value corresponding to the reserved bit in the MCS field is 28 or 29, which may indicate the determination mode1, the index value corresponding to the reserved bit in the MCS field is 30, the determination mode2 may indicate, the index value corresponding to the reserved bit in the MCS field is 31, and the determination mode 3 may be indicated.
In another embodiment, the meaning of the value of the reserved bit of the MCS field is defined according to whether the current transmission is an initial transmission or a retransmission, if the current transmission is an initial transmission, that is, the information or a Transport Block (TB) is an initial transmission, an index value corresponding to the reserved bit of the MCS field is 31, the terminal device is instructed to select a value of the MCS within an index range of all MCSs, if the index value corresponding to the reserved bit of the MCS is 30 or 29, the terminal device is instructed to select a value of the MCS within the first part or the second part, and the definitions of the first part and the second part are as above, which is not described herein again.
As an alternative implementation, the first indication information may be carried in DCI and RRC signaling, and the specific first indication information may have different design manners. The RRC signaling is used to configure at least one index range of the MCS, and the first index range is a subset of the at least one index range.
It should be appreciated that RRC signaling is used to configure the first index range in the above possible implementation. Alternatively, the RRC may configure a plurality of index ranges, and the first indication information may further indicate which index range of the plurality of index ranges the first index range is within through an MCS field of the DCI. For example, 3 index ranges are configured in the RRC signaling, and the value of the reserved bit in the MCS field is 30, which indicates the above determination mode 3, that is, indicates the terminal device to select the value of the MCS within the first index range configured by the network device.
Further, the reserved bits of the MCS field may further indicate a transmission type of the transport block, and the transmission type may include initial transmission, retransmission, or transmission configured by higher layer signaling, such as a Configuration Grant (CG) activation command. That is, the content of the reserved bit indication in the MCS field is different according to the difference of the transmission of the current Transport Block (TB) for initial transmission, retransmission or high-level signaling configuration.
Illustratively, the reserved bit of the MCS field is used to indicate that the transmission type is the initial transmission, the first value of the index corresponding to the reserved bit of the MCS field is used to indicate that the terminal device selects the MCS within the first index range of the MSC, the second value of the index corresponding to the reserved bit of the MCS field is used to indicate that the terminal device selects the MCS within the second index range of the MSC, the first index range is a subset of at least one index range, and the second index range is a subset of at least one index range. Both the first index range and the second index range may be configured through RRC signaling.
For example, if the index value corresponding to the reserved bit of the MCS field is 31, the terminal device is instructed to autonomously select the value of the MCS within the range of all MCS indexes; if the index value corresponding to the reserved bit in the MCS field is 30, indicating that the transmission state of the TB is the initial transmission, the first index range may be the range indicated by the first part, for example, may be [0, 13], that is, if the index value corresponding to the reserved bit in the MCS field is 30, the terminal apparatus may further indicate to select an MCS value in [0, 13 ]; if the index value corresponding to the reserved bit in the MCS field is 29 or 28, which indicates that the transmission state of the TB is the initial transmission, the first index range may be the range indicated by the second part, for example, [14, 28, or 27], that is, the index value corresponding to the reserved bit in the MCS field is 30, which may also indicate that the terminal device selects the value of the MCS within [14, 28, or 27 ]. Or, similarly, if the index value corresponding to the reserved bit in the MCS field is 30 or 29, which indicates that the transmission state of the TB is retransmission or transmission configured by a higher layer signaling, the index value corresponding to the reserved bit in the MCS field may also indicate that the terminal device selects the value of the MCS in [0, 13 ].
It should be understood that the correspondence between the index value corresponding to the reserved bit in the MCS field and the transmission state of the current TB, and the correspondence between the transmission state of the current TB and the index range used by the terminal device to determine the MCS are merely illustrative, and the embodiment of the present application does not limit this.
Illustratively, the reserved bits of the MCS field are used to indicate that the transmission type is retransmission or transmission configured through higher layer signaling, and the reserved bits of the MCS field are used to indicate that the MCS is a previous corresponding MCS of the same transport block.
S602, the terminal device determines the MCS to be used according to the first determination method.
The terminal device may determine the first determination method based on the received first indication information, and further determine the MCS to be used based on the first determination method.
The first indication information may be transmitted by the network device to the terminal apparatus through DCI, or may be transmitted by the network device to the terminal apparatus through DCI and RRC signaling. The terminal device determines the MCS to be used based on the first indication information, depending on the transmission method of the first indication information.
For example, the first indication information is carried in DCI.
Since the first indication information is carried in the DCI, the value range and the index of the MCS field in the current DCI may not be modified. That is, the indexes of the MCS fields of the table1 and the table3 are 0 to 28, the MCS has a definite value, the index of the MCS field of the table2 is 0 to 27, and the MCS has a definite value. Any index value of index values 29-31 corresponding to reserved bits of the MCS fields of table1 and table3 can be used to indicate any of the 3 determination methods. Different index values may indicate different ways of determining. It should be understood that any index corresponding to the reserved bits of the MCS field of table2, i.e. any index of 28-31, may be used to indicate any of the 3 determination manners described above. Different index values may indicate different ways of determining. For example, if the index value corresponding to the reserved bit of the MCS field is 31, the determination method 2 is indicated, that is, the terminal device is instructed to autonomously select the value of the MCS within the index range of all MCSs; correspondingly, the index value corresponding to the reserved bit of the MCS field is 30, which may indicate the above determination mode 3, that is, indicate the terminal device to select the value of the MCS within the first index range configured by the network device; in contrast, the index value corresponding to the reserved bit of the MCS field is 29 or 28, which indicates the above determination mode1, that is, indicates the MCS selected by the network device for the terminal device. This is exemplified below.
For the terminal device, if it is determined that the index value corresponding to the reserved bit of the MCS field corresponding to the first indication information is 31, the value of the MCS may be selected at 0 to 28, which are all MCS indexes of table1 or table3, or the value of the MCS may be selected at 0 to 27, which are all MCS indexes of table 2. If it is determined that the index value corresponding to the reserved bit of the MCS field corresponding to the first indication information is 30, the value of the MCS may be selected in a first index range, for example, [0, 13], of table1 or table3, for example, in 0 to 28, or the value of the MCS may be selected in a first index range, for example, [0, 13], of table2, for example, in 0 to 27. If the index value corresponding to the reserved bit of the MCS field is 29 or 28, the determination mode1 is indicated, that is, the network device is indicated to select the MCS for the terminal device. It should be understood that the first index range may be predefined, or may be signaled to the terminal device by the network device through RRC signaling.
For another example, the first indication information is carried in DCI and RRC signaling.
The RRC signaling is used to configure the first index range, and the first indication information is carried in the DCI. For example, the index value corresponding to the reserved bit of the MCS field corresponding to the first indication information is 30, and the terminal device may determine the value of the MCS to be selected in the first index range of the index of table1 or table3, for example, 0 to 28, or may select the value of the MCS in the first index range of the index of table2, for example, 0 to 27. Further, the terminal device determines the first index range according to the RRC signaling from the network device, and may select a value of the MCS within the first index range of the table1, the table2, or the table 3.
As another example, the reserved bit multiplexing of the MCS field indicates a transmission type of the transport block.
If the index value corresponding to the reserved bit of the MCS field is 30, the terminal device may determine to select the value of the MCS within a first index range of indexes, e.g., 0 to 28, of table1 or table3, or may select the value of the MCS within the first index range of indexes, e.g., 0 to 27, of table 2. If the reserved bits in the MCS field further indicate that the transmission state of the TB is the initial transmission, the terminal device may determine that the first index range is [0, 13], and the terminal device selects a value of the MCS within [0, 13 ].
The embodiment of the application can clearly indicate the terminal device to select the determination mode of the MCS under the scene of supporting various MCS configuration modes, and the existing protocol can be compatible by adopting the reserved bit indication of the MCS domain of the DCI.
In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of interaction between the network device and the terminal device. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above functions is implemented as a hardware structure, a software module, or a combination of a hardware structure and a software module depends upon the particular application and design constraints imposed on the technical solution.
The following describes an apparatus for implementing the above method in the embodiment of the present application with reference to the drawings. Therefore, the above contents can be used in the following embodiments, and the repeated contents are not described again.
Fig. 7 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. The communication apparatus 700 may correspondingly implement the functions or steps implemented by the network device or the terminal apparatus in the above-described method embodiments. The communication device 700 may include a transceiver module 710 and a processing module 720. Optionally, a storage unit may be included, which may be used to store instructions (code or programs) and/or data. The transceiver module 710 and the processing module 720 may be coupled with the storage unit, for example, the processing module 720 may read instructions (codes or programs) and/or data in the storage unit to implement the corresponding method. The above units may be provided independently, or may be partially or wholly integrated.
In some possible embodiments, the communication device 700 can implement the behavior and function of the terminal device in the above method embodiments. For example, the communication device 700 may be a terminal device, or may be a component (e.g., a chip or a circuit) applied to a terminal device. Processing module 720 is configured to perform all operations performed by the terminal device in the embodiment shown in fig. 5, except for transceiving operations, and/or other processes for supporting the techniques described herein. Such as S503 and S504 in the embodiment shown in fig. 5, and/or other processes for supporting the techniques described herein. The transceiver module 710 may be used to perform all of the receiving or transmitting operations performed by the terminal device in the embodiment shown in fig. 5, such as S501 and S502 in the embodiment shown in fig. 5, and/or other processes for supporting the techniques described herein.
In some embodiments, the processing module 720 is configured to detect transmission parameters received by the transceiver module for the second terminal device to transmit the sidelink information on the first resource, where the transmission parameters include transmission modes or path loss types, the transmission modes include broadcast, unicast and multicast, and the path loss types include sidelink path loss and downlink path loss; and determining whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information.
As an alternative implementation, the processing module 720 is configured to:
determining that the first resource is not a candidate resource if the energy detection on the first resource is greater than or equal to a threshold corresponding to the transmission parameter; or the like, or a combination thereof,
and determining that the first resource is a candidate resource when the energy detection on the first resource is less than a threshold corresponding to the transmission parameter.
As an alternative implementation, the processing module 720 is configured to:
first control information from the second terminal device is detected in the listening window, the first control information indicating a transmission mode.
In one possible design, the first control information is first-level sidelink control information SCI, and the first control information includes indication information of a second-level SCI format, where the second-level SCI format corresponds to a transmission mode.
As an optional implementation manner, the transceiver module 710 is further configured to receive first configuration information from the network device, where the first configuration information is used to indicate at least one energy detection threshold, where,
the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold and a third energy detection threshold, the first energy detection threshold corresponds to broadcasting, the second energy detection threshold corresponds to unicasting, and the third energy detection threshold corresponds to multicasting; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
As an optional implementation manner, the transceiver module 710 is further configured to receive, from the network device, first configuration information, where the first configuration information is used to indicate at least one energy detection threshold and at least one threshold offset, and the at least one energy detection threshold includes the first energy detection threshold, where,
the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or,
the first energy detection threshold corresponds to unicast, at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcast, and the second threshold offset corresponds to multicast; or,
the first energy detection threshold corresponds to broadcast, at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to unicast and multicast; or,
the first energy detection threshold corresponds to a broadcast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to a unicast, and the second threshold offset corresponds to a multicast.
As an optional implementation manner, the transceiver module 710 is further configured to receive first configuration information from the network device, where the first configuration information is used to indicate at least one energy detection threshold, where,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to the path loss of the side link, and the second energy detection threshold corresponds to the path loss of the down link; or,
the at least one energy detection threshold comprises a first energy detection threshold, the first configuration information is further used for indicating threshold offset, the first energy detection threshold is an energy detection threshold corresponding to the downlink path loss, and the threshold offset is a difference value between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,
the at least one energy detection threshold comprises a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side link path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of a downlink path loss.
As an optional implementation manner, the transceiver module 710 is further configured to receive first configuration information from the network device, where the first configuration information is used to indicate a first energy detection threshold;
the processing module 720 is further configured to determine a second energy detection threshold corresponding to the transmission mode according to at least one maximum transmission power of the second terminal device and the first configuration information.
As an optional implementation manner, the transceiver module 710 is further configured to receive second configuration information from the network device, where the second configuration information is used to indicate at least one maximum transmission power, and wherein,
the at least one maximum transmitting power comprises a first maximum transmitting power, a second maximum transmitting power and a third maximum transmitting power, wherein the first maximum transmitting power corresponds to broadcasting, the second maximum transmitting power corresponds to unicasting, and the third maximum transmitting power corresponds to multicasting; or,
the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,
the at least one maximum transmit power includes a first maximum transmit power corresponding to unicast and a second maximum transmit power corresponding to broadcast or multicast.
As an optional implementation manner, the transceiver module 710 is further configured to receive, from the network device, second configuration information, where the second configuration information is used to indicate the first maximum transmission power and the at least one transmission power offset, where,
the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,
the first maximum transmission power corresponds to unicast, the at least one transmission power offset comprises a first transmission power offset and a second transmission power offset, the first transmission power offset corresponds to broadcast, and the second transmission power offset corresponds to multicast; or,
the first maximum transmission power corresponds to broadcast, the at least one transmission power offset comprises a first transmission power offset, and the first transmission power offset corresponds to unicast or multicast; or,
the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
As an alternative implementation, the processing module 720 is configured to:
determining a first maximum transmission power corresponding to the transmission mode from at least one maximum transmission power of the second terminal device according to the second configuration information;
determining a transmission power threshold offset, wherein the transmission power threshold offset is a difference value between a first maximum transmission power and a maximum transmission power corresponding to a first energy detection threshold;
a second energy detection threshold is determined based on the transmit power threshold offset and the first energy detection threshold.
It should be understood that the processing module 720 in the embodiments of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 710 may be implemented by a transceiver or a transceiver-related circuit component.
In some possible implementations, the communication apparatus 700 can correspondingly implement the behaviors and functions of the network devices in the above method embodiments. For example, the communication apparatus 700 may be a network device, or may be a component (e.g., a chip or a circuit) applied to a network device. Processing module 720 is configured to perform all operations performed by the network device in the embodiment shown in fig. 5, except transceiving operations, and/or other processes to support the techniques described herein. Transceiver module 710 may be used to perform all of the receiving or transmitting operations performed by a network device in the embodiment shown in fig. 5, such as S501 and S502 in the embodiment shown in fig. 5, and/or other processes for supporting the techniques described herein.
In some embodiments, the transceiver module 710 is configured to transmit the first configuration information determined by the processing module 720 to the terminal device, where the first configuration information is used to indicate at least one energy detection threshold, the at least one energy detection threshold corresponds to at least one transmission method for transmitting the sidelink information or corresponds to at least one path loss type for transmitting the sidelink information, the transmission parameter includes a transmission method or a path loss type, the transmission method is broadcast, unicast, and multicast, and the path loss type includes a sidelink path loss and a downlink path loss.
As an optional implementation manner, the processing module 720 is further configured to configure the path loss type according to the transmission manner.
As an optional implementation manner, the at least one energy detection threshold includes a first energy detection threshold, a second energy detection threshold, and a third energy detection threshold, where the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,
the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
As an alternative implementation, the at least one energy detection threshold includes a first energy detection threshold, and the first configuration information is further used to indicate at least one threshold offset, wherein,
the first energy detection threshold corresponds to unicast, at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or, the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcasting, and the second threshold offset corresponds to multicasting; or,
the first energy detection threshold corresponds to broadcast, at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to unicast and multicast; or, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to unicast, and the second threshold offset corresponds to multicast.
As an optional implementation manner, the at least one energy detection threshold includes a first energy detection threshold and a second energy detection threshold, where the first energy detection threshold is an energy detection threshold corresponding to a side link path loss, and the second energy detection threshold corresponds to a downlink path loss; or,
the at least one energy detection threshold comprises a first energy detection threshold, and the configuration information is further used for indicating a threshold offset, wherein the first energy detection threshold is an energy detection threshold corresponding to the downlink path loss, and the threshold offset is a difference value between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,
the at least one energy detection threshold comprises a first energy detection threshold, and the configuration information is further configured to indicate a threshold offset, where the first energy detection threshold is a sidelink path loss threshold, and the threshold offset is an absolute value of a difference between the first energy detection threshold and the downlink path loss energy detection threshold.
As an optional implementation manner, the processing module 720 is further configured to generate second configuration information, where the second configuration information is used to indicate at least one maximum transmission power; the transceiver module 710 is further configured to send second configuration information to the terminal device.
As an optional implementation manner, the at least one maximum transmission power includes a first maximum transmission power, a second maximum transmission power, and a third maximum transmission power, where the first maximum transmission power corresponds to broadcast, the second maximum transmission power corresponds to unicast, and the third maximum transmission power corresponds to multicast; or,
the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,
the at least one maximum transmit power includes a first maximum transmit power corresponding to unicast and a second maximum transmit power corresponding to broadcast or multicast.
As an alternative implementation, the at least one maximum transmission power includes a first maximum transmission power, and the second configuration information is further used to indicate at least one transmission power offset, wherein,
the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,
the first maximum transmission power corresponds to unicast, the at least one transmission power offset comprises a first transmission power offset and a second transmission power offset, the first transmission power offset corresponds to broadcast, and the second transmission power offset corresponds to multicast; or,
the first maximum transmission power corresponds to broadcast, the at least one transmission power offset comprises a first transmission power offset, and the first transmission power offset corresponds to unicast or multicast; or,
the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
As an alternative implementation, the at least one energy detection threshold comprises a first energy detection threshold.
In some possible embodiments, the communication device 700 can implement the behavior and function of the terminal device in the above method embodiments. For example, the communication device 700 may be a terminal device, or may be a component (e.g., a chip or a circuit) applied to a terminal device. Wherein the processing module 720 is configured to perform all operations performed by the terminal device in the embodiment shown in fig. 6 except transceiving operations, and/or other processes for supporting the techniques described herein, such as S602 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver module 710 may be used to perform all of the receiving or transmitting operations performed by the terminal device in the embodiment shown in fig. 6, such as S601 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.
In other embodiments, the transceiver module 710 is configured to receive first indication information from a network device, where the first indication information is used to indicate a first determination manner of multiple determination manners of modulation and coding schemes MCS; the processing module 720 is configured to determine an MCS to be used according to the first determination method. It will be appreciated that the method may be performed by a first device, which may be a communication device or a communication apparatus capable of supporting the communication device to perform the functions required by the method, such as a system-on-chip or a communication module in a communication device. Illustratively, the communication apparatus may be a terminal device.
As an optional implementation manner, the first indication information is carried in an MCS field of the downlink control information DCI, and a value of a reserved bit of the MCS field is used to indicate the first determination manner, wherein,
the first determination method is that the terminal equipment selects the MCS within the index range of all the MSCs, or the first determination method is that the terminal equipment selects the MCS within the first index range of the MSCs, where the first index range is a subset of the index range of all the MSCs.
As an optional implementation manner, the first indication information is further carried in radio resource control RRC signaling, where the RRC signaling is used to configure at least one index range of the MCS, and the first index range is a subset of the at least one index range.
As an optional implementation manner, the reserved bits of the MCS field are further used to indicate a transmission type of the transport block, where the transmission type includes initial transmission, retransmission, or transmission configured by higher layer signaling, where,
the reserved bit of the MCS domain is used for indicating that the transmission type is primary transmission, the first value of the reserved bit of the MCS domain is used for indicating that the terminal equipment selects MCS in the first index range of the MSC, the second value of the reserved bit of the MCS domain is used for indicating that the terminal equipment selects MCS in the second index range of the MSC, the first index range is a subset of at least one index range, and the second index range is a subset of at least one index range; or,
the reserved bits of the MCS field are used to indicate that the transmission type is retransmission or transmission configured through high-layer signaling, and the reserved bits of the MCS field are used to indicate that the MCS is a previous corresponding MCS of the same transport block.
In some possible implementations, the communication apparatus 700 can correspondingly implement the behaviors and functions of the network devices in the above method embodiments. For example, the communication apparatus 700 may be a network device, or may be a component (e.g., a chip or a circuit) applied to a network device. Processing module 720 is configured to perform all operations performed by the network device in the embodiment shown in fig. 6, except transceiving operations, and/or other processes to support the techniques described herein. Transceiver module 710 may be used to perform all receiving or transmitting operations performed by a network device in the embodiment shown in FIG. 6, such as S601 in the embodiment shown in FIG. 6, and/or other processes for supporting the techniques described herein.
In other embodiments, the transceiver module 710 is configured to send, to the terminal device, the first indication information determined by the processing module 720, where the first indication information is used to indicate a first determination manner of the multiple determination manners of the modulation and coding scheme MCS.
As an optional implementation manner, the first indication information is carried in an MCS field of the downlink control information DCI, and a value of a reserved bit of the MCS field is used to indicate the first determination manner, wherein,
the first determination method is that the terminal equipment selects the MCS within the index range of all the MSCs, or the first determination method is that the terminal equipment selects the MCS within the first index range of the MSCs, where the first index range is a subset of the index range of all the MSCs.
As an optional implementation manner, the first indication information is further carried in radio resource control RRC signaling, where the RRC signaling is used to configure at least one index range of the MCS, and the first index range is a subset of the at least one index range.
As an optional implementation manner, the reserved bits of the MCS field are further used to indicate a transmission type of the transport block, where the transmission type includes initial transmission, retransmission, or transmission configured by higher layer signaling, where,
the reserved bit of the MCS domain is used for indicating that the transmission type is primary transmission, the first value of the reserved bit of the MCS domain is used for indicating that the terminal equipment selects MCS in the first index range of the MSC, the second value of the reserved bit of the MCS domain is used for indicating that the terminal equipment selects MCS in the second index range of the MSC, the first index range is a subset of at least one index range, and the second index range is a subset of at least one index range; or,
the reserved bits of the MCS field are used to indicate that the transmission type is retransmission or transmission configured through high-layer signaling, and the reserved bits of the MCS field are used to indicate that the MCS is a previous corresponding MCS of the same transport block.
Fig. 8 shows a communication apparatus 800 according to an embodiment of the present application, where the communication apparatus 800 may be a terminal apparatus and may implement a function of the terminal apparatus in the method according to the embodiment of the present application, or the communication apparatus 800 may be a network device and may implement a function of the network device in the method according to the embodiment of the present application; the communication apparatus 800 may also be an apparatus capable of supporting a network device to implement the corresponding functions in the method provided in the embodiment of the present application. The communication device 800 may be a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.
In a hardware implementation, the transceiver module 710 may be a transceiver, and the transceiver is integrated in the communication device 800 to form the communication interface 810. It should be understood that the transceiver module 710 may also be a separate transmitting module and receiving module.
The communication apparatus 800 includes at least one processor 820 for implementing or supporting the communication apparatus 800 to implement the functions of the first network device or the second network device or the terminal device in the method provided by the embodiment of the present application. For details, reference is made to the detailed description in the method example, which is not repeated herein.
The communications apparatus 800 can also include at least one memory 830 for storing program instructions and/or data. The memory 830 is coupled with the processor 820. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 820 may operate in conjunction with the memory 830. Processor 820 may execute program instructions and/or data stored in memory 830 to cause communication device 800 to implement a corresponding method. At least one of the at least one memory may be included in the processor.
The communications apparatus 800 can also include a communication interface 810 for communicating with other devices over a transmission medium such that the apparatus used in the communications apparatus 800 can communicate with other devices. Illustratively, when the communication device is a terminal device, the other device is a first network device or a second network device; or, when the communication device is the first network device or the second network device, the other device is a terminal device. Processor 820 may transceive data using communication interface 810. The communication interface 810 may specifically be a transceiver.
The specific connection medium among the communication interface 810, the processor 820 and the memory 830 is not limited in the embodiments of the present application. In fig. 8, the memory 830, the processor 820 and the communication interface 810 are connected by a bus 840, the bus is represented by a thick line in fig. 8, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
In the embodiments of the present application, the processor 820 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory 830 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
The communication device in the above embodiments may be a terminal device, a circuit, a chip applied to a terminal device, or other combined devices and components having the functions of the terminal device. When the communication device is a terminal device, the transceiver unit may be a transceiver, and may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a Central Processing Unit (CPU). When the communication device is a component having the functions of the terminal equipment, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.
Fig. 9 shows a simplified schematic of a communication device. For ease of understanding and illustration, in fig. 9, the communication apparatus is exemplified by the network device being a base station. The base station can be applied to the system shown in fig. 4, and can be the network device in fig. 4, and performs the functions of the network device in the above method embodiments. The network device 900 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 910 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 920. The RRU 910 may be referred to as a communication module, which corresponds to the transceiver module 710 in fig. 7, and optionally may also be referred to as a transceiver, a transceiver circuit, or a transceiver, which may include at least one antenna 911 and a radio frequency unit 912. The RRU 910 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information to a terminal device. The BBU 920 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 910 and the BBU 920 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.
The BBU 920 is a control center of a base station, and may also be referred to as a processing module, and may correspond to the processing module 720 in fig. 7, and is mainly used for completing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing module) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.
In an example, the BBU 920 may be formed by one or more boards, and the boards may jointly support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 920 also includes a memory 921 and a processor 922. The memory 921 is used to store the necessary instructions and data. The processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure related to the network device in the above method embodiment. The memory 921 and processor 922 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.
The embodiment of the application also provides a communication device, and the communication device can be terminal equipment or a circuit. The communication device may be configured to perform the actions performed by the terminal device in the above-described method embodiments.
Fig. 10 shows a simplified schematic diagram of a terminal device. For ease of understanding and illustration, in fig. 10, the terminal device is exemplified by a mobile phone. As shown in fig. 10, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the vehicle-mounted unit, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of apparatuses may not have input/output devices.
When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 10. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.
In the embodiment of the present application, the antenna and the rf circuit with transceiving function may be regarded as a transceiving unit of the apparatus, and the processor with processing function may be regarded as a processing unit of the apparatus. As shown in fig. 10, the apparatus includes a transceiver unit 1010 and a processing unit 1020. The transceiver unit 1010 may also be referred to as a transceiver, a transceiving device, etc. The processing unit 1020 may also be referred to as a processor, a processing board, a processing module, a processing device, etc. Optionally, a device for implementing the receiving function in the transceiving unit 1010 may be regarded as a receiving unit, and a device for implementing the transmitting function in the transceiving unit 1010 may be regarded as a transmitting unit, that is, the transceiving unit 1010 includes a receiving unit and a transmitting unit. Transceiver unit 1010 may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.
It should be understood that the transceiving unit 1010 is configured to perform the transmitting operation and the receiving operation on the terminal device side in the above method embodiments, and the processing unit 1020 is configured to perform other operations besides the transceiving operation on the terminal device in the above method embodiments.
For example, in one implementation, the transceiving unit 1010 may be used to perform S301 in the embodiment illustrated in fig. 3, and/or other processes to support the techniques described herein.
For another example, in one implementation, the transceiver unit 1010 may be configured to perform S401, S405, S406 in the embodiment shown in fig. 4 and/or other processes for supporting the techniques described herein.
For another example, in one implementation, the transceiving unit 1010 may be configured to perform S501, S502, S503, S504, S505 in the embodiment illustrated in fig. 5 and/or other processes for supporting the techniques described herein.
When the communication device is a chip-like device or circuit, the device may comprise a transceiver unit and a processing unit. The transceiver unit may be an input/output circuit and/or a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit.
In this embodiment, reference may be made to the apparatus shown in fig. 11. As an example, the apparatus may perform functions similar to processing module 720 of FIG. 7. In fig. 11, the apparatus includes a processor 1110, a transmit data processor 1120, and a receive data processor 1130. The processing module 720 in the above embodiments may be the processor 1110 in fig. 11, and performs the corresponding functions. The processing module 720 in the above embodiments may be the transmit data processor 1120, and/or the receive data processor 1130 in fig. 11. Although fig. 11 shows a channel encoder and a channel decoder, it is understood that these blocks are not limitative and only illustrative to the present embodiment.
Fig. 12 shows another form of the present embodiment. The communication device 1200 includes modules such as a modulation subsystem, a central processing subsystem, and peripheral subsystems. The communication device in this embodiment may serve as a modulation subsystem therein. In particular, the modulation subsystem may include a processor 1203, an interface 1204. The processor 1203 completes the functions of the processing module 720, and the interface 1204 completes the functions of the transceiver module 710. As another variation, the modulation subsystem includes a memory 1206, a processor 1203 and a program stored in the memory 1206 and executable on the processor, and the processor 1203 executes the program to implement the method of the terminal device in the above method embodiment. It should be noted that the memory 1206 may be non-volatile or volatile, and may be located within the modulation subsystem or within the processing device 1200, as long as the memory 1206 can be connected to the processor 1203.
The embodiment of the present application further provides a communication system, and specifically, the communication system includes the above network device and terminal device, or may further include more network devices and a plurality of terminal devices. Which are respectively used to implement the functionality of the network parts described above in connection with fig. 5 and 6. The terminal device is used for implementing the functions of the terminal related to fig. 5 and fig. 6. Please refer to the related description in the above method embodiments, which is not repeated herein.
Also provided in embodiments of the present application is a computer-readable storage medium, comprising instructions, which when executed on a computer, cause the computer to perform the method performed by the network device in fig. 5 and 6; or when run on a computer, cause the computer to perform the methods performed by the terminal devices of fig. 5 and 6.
Also provided in an embodiment of the present application is a computer program product including instructions that, when executed on a computer, cause the computer to perform the method performed by the network device in fig. 5 and 6; or when run on a computer, cause the computer to perform the methods performed by the terminal devices of fig. 5 and 6.
The embodiment of the application provides a chip system, which comprises a processor and a memory, and is used for realizing the functions of network equipment or terminal equipment in the method; or for implementing the functions of the network device and the terminal device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
It should be understood that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple.
And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first configuration information and the second configuration information are only for distinguishing different messages, and do not indicate the difference in priority, transmission order, importance, or the like between the two messages.
It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).
It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor.
It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific implementation of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.
Claims (44)
- A method of communication, comprising:the method comprises the steps that a first terminal device detects transmission parameters used for a second terminal device to send side-row information on a first resource, the transmission parameters comprise transmission modes or path loss types, the transmission modes comprise broadcasting, unicasting or multicasting, and the path loss types comprise side-row link path loss and downlink path loss;and the first terminal device determines whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, wherein the candidate resource is a candidate resource for the first terminal device to send the side information.
- The method of claim 1, wherein the determining, by the first terminal device, whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter comprises:determining that the first resource is not a candidate resource if the energy detection on the first resource is greater than or equal to a threshold corresponding to the transmission parameter; or,determining that the first resource is a candidate resource if the energy detection on the first resource is less than a threshold corresponding to the transmission parameter.
- The method of claim 1 or 2, wherein the first terminal device detecting transmission parameters for the second terminal device to transmit the sidelink information on the first resource comprises:and the first terminal device detects first control information from the second terminal device in a listening window, wherein the first control information is used for indicating the transmission mode.
- The method of claim 3, wherein the first control information is first-level Sidelink Control Information (SCI) and the first control information comprises indication information of a second-level SCI format, and the second-level SCI format corresponds to the transmission mode.
- The method of any of claims 1-4, wherein the method further comprises:the first terminal device receives first configuration information from a network device, the first configuration information indicating at least one energy detection threshold, wherein,the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold and a third energy detection threshold, the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
- The method of any of claims 1-4, wherein the method further comprises:the first terminal device receives first configuration information from a network device, the first configuration information indicating at least one energy detection threshold and at least one threshold offset, the at least one energy detection threshold comprising a first energy detection threshold, wherein,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcast, and the second threshold offset corresponds to multicast; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to a unicast and a multicast; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to a unicast, and the second threshold offset corresponds to a multicast.
- The method of any of claims 1-4, wherein the method further comprises:the first terminal device receives first configuration information from a network device, the first configuration information indicating at least one energy detection threshold, wherein,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to a side link path loss, and the second energy detection threshold corresponds to a downlink path loss; or,the at least one energy detection threshold comprises a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,the at least one energy detection threshold includes a first energy detection threshold, and the first configuration information is further configured to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side link path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
- The method of any one of claims 1-4, further comprising:the first terminal device receives first configuration information from network equipment, wherein the first configuration information is used for indicating a first energy detection threshold;and the first terminal device determines a second energy detection threshold corresponding to the transmission mode according to at least one maximum transmission power of the second terminal device and the first configuration information.
- The method of claim 8, wherein the method further comprises:the first terminal device receiving second configuration information from a network apparatus, the second configuration information indicating the at least one maximum transmit power, wherein,the at least one maximum transmission power comprises a first maximum transmission power, a second maximum transmission power and a third maximum transmission power, wherein the first maximum transmission power corresponds to broadcasting, the second maximum transmission power corresponds to unicasting, and the third maximum transmission power corresponds to multicasting; or,the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,the at least one maximum transmit power includes a first maximum transmit power corresponding to unicast and a second maximum transmit power corresponding to broadcast or multicast.
- The method of claim 8, wherein the method further comprises:the first terminal device receiving second configuration information from the network equipment, the second configuration information indicating a first maximum transmit power and at least one transmit power offset, wherein,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to a unicast or a multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
- The method of claim 9 or 10, wherein the determining, by the first terminal device, the second energy detection threshold corresponding to the transmission mode according to the at least one maximum transmission power of the second terminal device and the first configuration information comprises:the first terminal device determines a first maximum transmission power corresponding to the transmission mode from at least one maximum transmission power of the second terminal device according to the second configuration information;determining, by the first terminal device, a transmit power threshold offset, where the transmit power threshold offset is a difference between the first maximum transmit power and a maximum transmit power corresponding to the first energy detection threshold;the first terminal device determines the second energy detection threshold according to the transmission power threshold offset and the first energy detection threshold.
- A method of communication, comprising:the network device sends first configuration information to a terminal device, wherein the first configuration information is used for indicating at least one energy detection threshold, the at least one energy detection threshold corresponds to at least one transmission mode used for sending the sideline information or at least one path loss type used for sending the sideline information, the transmission parameter comprises a transmission mode or a path loss type, the transmission mode comprises broadcasting, unicasting or multicasting, and the path loss type comprises sideline link path loss and downlink path loss.
- The method of claim 12, wherein the method further comprises:and the network equipment configures the path loss type according to the transmission mode.
- The method of claim 12 or 13, wherein the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold, and a third energy detection threshold, the first energy detection threshold corresponding to broadcast, the second energy detection threshold corresponding to unicast, and the third energy detection threshold corresponding to multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
- The method of claim 12 or 13, wherein the at least one energy detection threshold comprises a first energy detection threshold, the first configuration information further indicating at least one threshold offset, wherein,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcasting, and the second threshold offset corresponds to multicasting; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to a unicast and a multicast; or the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to unicast, and the second threshold offset corresponds to multicast.
- The method of claim 12 or 13, wherein the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponding to a sidelink path loss, the second energy detection threshold corresponding to a downlink path loss; or,the at least one energy detection threshold comprises a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,the at least one energy detection threshold includes a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side link path loss, and the threshold offset is an absolute value of a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
- The method of claim 12 or 13, wherein the method further comprises:and the network equipment sends second configuration information to the terminal equipment, wherein the second configuration information is used for indicating at least one maximum transmission power.
- The method of claim 17,the at least one maximum transmission power comprises a first maximum transmission power, a second maximum transmission power and a third maximum transmission power, wherein the first maximum transmission power corresponds to broadcasting, the second maximum transmission power corresponds to unicasting, and the third maximum transmission power corresponds to multicasting; or,the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,the at least one maximum transmit power includes a first maximum transmit power and a second maximum transmit power, the first maximum transmit power corresponding to unicast and the second maximum transmit power corresponding to broadcast or multicast.
- The method of claim 17,the at least one maximum transmit power comprises a first maximum transmit power, the second configuration information further indicates at least one transmit power offset, wherein,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to a unicast or a multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
- The method of any of claims 17-19, wherein the at least one energy detection threshold comprises a first energy detection threshold.
- A communications apparatus, comprising:a processing module, configured to detect a transmission parameter received by the transceiver module and used for a second terminal device to send sideline information on a first resource, where the transmission parameter includes a transmission mode or a path loss type, the transmission mode includes broadcast, unicast or multicast, and the path loss type includes sideline link path loss and downlink path loss; and determining whether the first resource is a candidate resource according to an energy detection threshold corresponding to the transmission parameter, where the candidate resource is a candidate resource for the first terminal device to send the sidelink information.
- The communications apparatus of claim 21, wherein the processing module is to:determining that the first resource is not a candidate resource if the energy detection on the first resource is greater than or equal to a threshold corresponding to the transmission parameter; or,determining that the first resource is a candidate resource if the energy detection on the first resource is less than a threshold corresponding to the transmission parameter.
- The communications apparatus of claim 21 or 22, wherein the processing module is to:and detecting first control information from the second terminal device in a listening window, wherein the first control information is used for indicating the transmission mode.
- The communications apparatus as claimed in claim 23, wherein the first control information is a first-level sidelink control information SCI, and the first control information includes indication information of a second-level SCI format, and the second-level SCI format corresponds to the transmission scheme.
- The communications apparatus as claimed in any of claims 21-24, wherein the transceiver module is further configured to:receiving first configuration information from a network device, the first configuration information indicating at least one energy detection threshold, wherein,the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold and a third energy detection threshold, the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
- The communications apparatus as claimed in any of claims 21-24, wherein the transceiver module is further configured to:receiving first configuration information from a network device, the first configuration information indicating at least one energy detection threshold and at least one threshold offset, the at least one energy detection threshold comprising a first energy detection threshold, wherein,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcast, and the second threshold offset corresponds to multicast; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to unicast and multicast; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to a unicast, and the second threshold offset corresponds to a multicast.
- The communications apparatus as claimed in any of claims 21-24, wherein the transceiver module is further configured to:receiving first configuration information from a network device, the first configuration information indicating at least one energy detection threshold, wherein,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to a side link path loss, and the second energy detection threshold corresponds to a downlink path loss; or,the at least one energy detection threshold comprises a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,the at least one energy detection threshold includes a first energy detection threshold, and the first configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side uplink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
- The communications device of any of claims 21-24, wherein the transceiver module is further configured to:receiving first configuration information from a network device, wherein the first configuration information is used for indicating a first energy detection threshold;the processing module is further configured to determine a second energy detection threshold corresponding to the transmission mode according to at least one maximum transmission power of the second terminal device and the first configuration information.
- The communications apparatus of claim 28, wherein the transceiver module is further configured to:receiving second configuration information from a network device, the second configuration information indicating the at least one maximum transmit power, wherein,the at least one maximum transmission power comprises a first maximum transmission power, a second maximum transmission power and a third maximum transmission power, wherein the first maximum transmission power corresponds to broadcasting, the second maximum transmission power corresponds to unicasting, and the third maximum transmission power corresponds to multicasting; or,the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,the at least one maximum transmit power includes a first maximum transmit power and a second maximum transmit power, the first maximum transmit power corresponding to unicast and the second maximum transmit power corresponding to broadcast or multicast.
- The communications apparatus of claim 28, wherein the transceiver module is further configured to:receiving second configuration information from a network device, the second configuration information indicating a first maximum transmit power and at least one transmit power offset, wherein,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to a unicast or a multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
- The communications apparatus of claim 29 or 30, wherein the processing module is configured to:determining a first maximum transmission power corresponding to the transmission mode from at least one maximum transmission power of the second terminal device according to the second configuration information;determining a transmission power threshold offset, where the transmission power threshold offset is a difference between the first maximum transmission power and a maximum transmission power corresponding to the first energy detection threshold;and determining the second energy detection threshold according to the transmission power threshold offset and the first energy detection threshold.
- A communications apparatus, comprising:a transceiver module, configured to send first configuration information determined by the processing module to a terminal device, where the first configuration information is used to indicate at least one energy detection threshold, the at least one energy detection threshold corresponds to at least one transmission mode used for sending the sideline information or corresponds to at least one path loss type used for sending the sideline information, the transmission parameter includes a transmission mode or a path loss type, the transmission mode includes broadcast, unicast, or multicast, and the path loss type includes sideline link path loss and downlink path loss.
- The communications apparatus of claim 32, wherein the processing module is further configured to:and configuring the path loss type according to the transmission mode.
- The communications apparatus of claim 32 or 33, wherein the at least one energy detection threshold comprises a first energy detection threshold, a second energy detection threshold, and a third energy detection threshold, the first energy detection threshold corresponds to broadcast, the second energy detection threshold corresponds to unicast, and the third energy detection threshold corresponds to multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to unicast, and the second energy detection threshold corresponds to broadcast and multicast; or,the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponds to broadcasting, and the second energy detection threshold corresponds to unicast and multicast.
- The communications apparatus of claim 32 or 33, wherein the at least one energy detection threshold comprises a first energy detection threshold, the first configuration information further indicating at least one threshold offset, wherein,the first energy detection threshold corresponds to unicast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to broadcast and multicast; or the at least one threshold offset comprises a first threshold offset and a second threshold offset, the first threshold offset corresponds to broadcasting, and the second threshold offset corresponds to multicasting; or,the first energy detection threshold corresponds to a broadcast, the at least one threshold offset comprises a first threshold offset, and the first threshold offset corresponds to a unicast and a multicast; or the at least one threshold offset includes a first threshold offset and a second threshold offset, the first threshold offset corresponds to unicast, and the second threshold offset corresponds to multicast.
- The communications apparatus of claim 32 or 33, wherein the at least one energy detection threshold comprises a first energy detection threshold and a second energy detection threshold, the first energy detection threshold corresponding to a sidelink path loss, the second energy detection threshold corresponding to a downlink path loss; or,the at least one energy detection threshold comprises a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a downlink path loss, and the threshold offset is a difference between the first energy detection threshold and the energy detection threshold of the sidelink path loss; or,the at least one energy detection threshold includes a first energy detection threshold, and the configuration information is further used to indicate a threshold offset, where the first energy detection threshold is an energy detection threshold corresponding to a side uplink path loss, and the threshold offset is an absolute value of a difference between the first energy detection threshold and the energy detection threshold of the downlink path loss.
- The communication apparatus according to claim 32 or 33,the transceiver module is further configured to send the second configuration information to the first terminal device, where the second configuration information is used to indicate at least one maximum transmission power.
- The communications apparatus of claim 37,the at least one maximum transmission power comprises a first maximum transmission power, a second maximum transmission power and a third maximum transmission power, wherein the first maximum transmission power corresponds to broadcasting, the second maximum transmission power corresponds to unicasting, and the third maximum transmission power corresponds to multicasting; or,the at least one maximum transmission power comprises a first maximum transmission power and a second maximum transmission power, the first maximum transmission power corresponds to broadcasting, and the second maximum transmission power corresponds to unicast or multicast; or,the at least one maximum transmit power includes a first maximum transmit power corresponding to unicast and a second maximum transmit power corresponding to broadcast or multicast.
- The communications apparatus of claim 37,the at least one maximum transmit power comprises a first maximum transmit power, the second configuration information further indicates at least one transmit power offset, wherein,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to broadcast or multicast; or,the first maximum transmit power corresponds to unicast, the at least one transmit power offset comprises a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to broadcast, and the second transmit power offset corresponds to multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset comprises a first transmit power offset, and the first transmit power offset corresponds to a unicast or a multicast; or,the first maximum transmit power corresponds to a broadcast, the at least one transmit power offset includes a first transmit power offset and a second transmit power offset, the first transmit power offset corresponds to a unicast, and the second transmit power offset corresponds to a multicast.
- The communications apparatus as claimed in any of claims 37-39, wherein the at least one energy detection threshold comprises a first energy detection threshold.
- A communications device comprising a processor and a memory, the memory storing a computer program, the processor being configured to execute the computer program such that the device implements a method as claimed in any one of claims 1 to 11 or 12 to 20.
- A communication system comprising a communication device according to any one of claims 21 to 31 or a communication device according to any one of claims 32 to 40.
- A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer, causes the computer to carry out the method according to any one of claims 1 to 11 or 12 to 20.
- A computer program product, characterized in that it stores a computer program which, when executed by a computer, causes the computer to carry out the method according to any one of claims 1 to 11 or 12 to 20.
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| PCT/CN2019/116863 WO2021088063A1 (en) | 2019-11-08 | 2019-11-08 | Communication method and device |
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| CN107659965B (en) * | 2016-07-26 | 2023-05-05 | 北京三星通信技术研究有限公司 | Resource selection method and equipment |
| WO2018174661A1 (en) * | 2017-03-24 | 2018-09-27 | Samsung Electronics Co., Ltd. | Resource selection method in vehicle to everything communication and apparatus therefore |
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