CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a 371 application of International Application No. PCT/CN2017/088508, filed on Jun. 15, 2017, the entire disclosure of which is hereby incorporated by reference.

TECHNICAL FIELD

Implementations of the present disclosure relate to the communication field, and more particularly, relate to a method for transmitting a signal, a network device, and a terminal device.

BACKGROUND

At present, in research of New Radio (NR), how to improve transmission reliability is always a research problem due to a working frequency band for transmitting signals.

SUMMARY

In view of this, implementations of the present disclosure provide a method for transmitting a signal, a network device and a terminal device.

In a first aspect, there is provided a method for transmitting a signal, and the method includes: determining, by a first network device, a time-frequency resource for transmitting a signal in a first frequency band corresponding to the first network device; and transmitting, by the first network device, a signal with a first terminal device on the time-frequency resource.

A frequency band refers to the part of radio spectrum located between specific frequency boundaries. Generally speaking, the frequency band refers to a frequency range between a highest frequency and a lowest frequency on which a signal is allowed to be transmitted. Here, it refers to a frequency resource with a certain width in frequency domain, and the restriction in time domain is not necessary. For example, the frequency band may be a carrier.

A network device may refer to a device that may provide network services physically, or may be a device that may provide network services logically. For example, the network device may be a Transmission and Reception Point (TRP).

The first frequency band corresponding to the first network device means that the first frequency band is configured for the first network device to transmit a signal. The first frequency band may be used by the first network device to transmit the signal of the first network device to the terminal device, or may be used by the first network device to receive a signal transmitted from the terminal device. It should be understood that, the corresponding here may be specified in a protocol, or may be negotiated between network devices, or may be configured by a primary network device to a secondary network device.

The network device further determines the time-frequency resource for transmitting the signal with the terminal device within the configured frequency band, which is beneficial to improving transmission reliability.

In a possible implementation, the method further includes: receiving, by the first network device, first indication information; wherein determining, by the first network device, the time-frequency resource for transmitting the signal in the first frequency band corresponding to the first network device, includes: determining, by the first network device, the time-frequency resource according to the first indication information.

The first indication information is sent based on interference caused by a second frequency band to the first frequency band.

The second network device may acquire a frequency band configured for other network devices, and may use a certain rule to configure resources for the frequency band of other network devices according to interference of a frequency band configured for the second network device to the frequency band of other network devices, and inform other network devices of a situation of the frequency band configuration by the second network device for other network devices.

In a possible implementation, the first frequency band is used for transmitting a downlink signal and the second frequency band is used for transmitting an uplink signal; or the first frequency band is used for transmitting an uplink signal and the second frequency band is used for transmitting a downlink signal.

Transmission directions of the first frequency band and the second frequency band are exactly opposite. For example, the first frequency band may be configured for the first network device to receive a signal from the terminal device, and the second frequency band may be configured for the first network device or other network devices to send a signal to the terminal device; or, the first frequency band may be configured for the first network device to send a signal to the terminal device, and the second frequency band may be configured for the first network device or other network devices to receive a signal sent by the terminal device.

In a possible implementation, the first indication information is used for indicating a scheduling mode of each time domain unit within a first period in the first frequency band for the first network device, and/or the first indication information is used for indicating a scheduling mode of each frequency domain unit in the first frequency band for the first network device. Determining, by the first network device, the time-frequency resource for transmitting the signal in the first frequency band corresponding to the first network device, includes: the first network device determining the time-frequency resource according to at least one of the scheduling mode of each time domain unit or the scheduling mode of each frequency domain unit.

The above period and the number of the time domain units may be negotiated between the network devices in advance or configured by a primary network device. For example, a period of 10 time slots may be specified in advance, and the time domain unit may be one time slot, or may be two time slots, etc.

The first indication information may be a bit map defined broadly. For example, x0may be used for representing that the time domain unit may be used for transmitting a signal, x1represents that the time domain unit is prohibited to be used for transmitting a signal, x2may represent that the time domain unit may be used for transmitting a signal only with a certain restriction, etc.

The number of frequency domain units into which the first frequency band is divided and a size of the frequency domain unit may be negotiated between the network devices in advance or configured by a primary network device. For example, it can be specified in advance that the first frequency band is divided by 15 kHz, that is, the frequency domain unit is 15 kHz, or an integer multiple of 15 kHz.

Similarly, each frequency domain unit in the first frequency band may be indicated by a bit map defined broadly.

In a possible implementation, the scheduling mode includes allowing scheduling, prohibiting scheduling, or scheduling by using an adjusted or restricted level of a coding and modulation scheme.

The scheduling mode may be to limit a certain number of terminal devices to allow scheduling.

In a possible implementation, the first indication information is used for indicating at least two kinds of information of: a starting position in time domain, a length in time domain, and a ending position in time domain of the time-frequency resource; and/or the first indication information is used for indicating at least two kinds of information of: a starting position in frequency domain, a bandwidth, and an ending position in frequency domain of the time-frequency resource.

The first indication information may be used for indicating at least two kinds of information of: a starting position in time domain, a length in time domain, and an ending position in time domain of a restricted time-frequency resource in the first frequency band, and/or the first indication information may be used for indicating at least two kinds of information of: a starting position in frequency domain, a bandwidth, and an ending position in frequency domain of a restricted time-frequency resource in the first frequency band, so the first network device can determine a time-frequency resource allowed to be scheduled according to the restricted time-frequency resource indicated in the first indication information.

In a possible implementation, the first indication information is used for indicating time domain configuration information of an uplink and downlink frequency band corresponding to a second network device within a second period, the uplink and downlink frequency band includes a second frequency band causing interference to the first frequency band. Determining, by the first network device, the time-frequency resource according to the first indication information, includes: the first network device determines the time-frequency resource according to the time domain configuration information.

In the implementation, the period is similar to that described above, which may be agreed or configured in advance. Generally, a part of the frequency band configured for the network device is used for transmitting an uplink signal, and the other part is used for transmitting a downlink signal, that is, the frequency band configured for network device includes an uplink frequency band and a downlink frequency band. The uplink frequency band may be the same as the downlink frequency band, but staggered in the time domain, which is the so-called time-division multiplexing. As long as the first network device obtain time domain configuration information of the frequency band corresponding to other network devices, that is, an uplink and downlink configuration condition in one period, the first network device may automatically determine a schedulable time domain resource in the first frequency band or a time domain resource of which scheduling is restricted according to certain rules, on the basis of the uplink and downlink configuration condition.

In a possible implementation, the method further includes: receiving, by the first network device, terminal configuration information of the first terminal device; wherein, determining, by the first network device, the time-frequency resource for transmitting the signal in the first frequency band corresponding to the first network device, includes: determining, by the first network device, the time-frequency resource corresponding to the first terminal device according to the terminal configuration information.

Different terminal devices under the first network device may correspond to different configuration modes in the first frequency band, or different groups of terminal devices may correspond to different configuration modes in the first frequency band. Other network devices may send identification of the first terminal device or a group number to which the first terminal device belongs when sending the first indication information to the first network device, so that the first network device may know that the time-frequency resource indicated by the first indication information may be used for transmitting the signal of the first terminal device. Or, the above corresponding relationship may be stored among the network devices, and other network devices only need inform the first network device the identification of the first terminal device or the group number to which the first terminal device belongs.

The time-frequency resource indicated by the first indication information may be applicable to all terminal devices under the first network device.

In a possible implementation, the first frequency band is a new radio (NR) carrier, and/or the second frequency band is a long term evolution (LTE) carrier or an NR carrier.

In a possible implementation, a cell corresponding to the second frequency band is a primary cell.

In a second aspect, there is provided a method for transmitting a signal, and the method includes: sending, by a second network device, first indication information to a first network device according to interference caused by a second frequency band to a first frequency band, wherein the first indication information is used for the first network device to determine a time-frequency resource that is capable of being used for transmitting a signal in the first frequency band.

In a possible implementation, the first frequency band is used for transmitting a downlink signal and the second frequency band is used for transmitting an uplink signal; or the first frequency band is used for transmitting an uplink signal and the second frequency band is used for transmitting a downlink signal.

In a possible implementation, the first indication information is used for indicating a scheduling mode of each time domain unit within a first period in the first frequency band for the first network device, and/or the first indication information is used for indicating a scheduling mode of each frequency domain unit in the first frequency band for the first network device.

In a possible implementation, the scheduling mode includes allowing scheduling, prohibiting scheduling, or scheduling by using an adjusted or restricted level of a coding and modulation scheme.

In a possible implementation, the first indication information is used for indicating at least two kinds of information of: a starting position in time domain, a length in time domain, and an ending position in time domain of the time-frequency resource; and/or the first indication information is used for indicating at least two kinds of information of: a starting position in frequency domain, a bandwidth, and an ending position in frequency domain of the time-frequency resource.

In a possible implementation, the first indication information is used for indicating time domain configuration information of an uplink and downlink frequency band corresponding to the second network device within a second period, and the uplink and downlink frequency band includes a second frequency band.

In a possible implementation, the first indication information is used for indicating a time-frequency resource of a first terminal device, wherein the first terminal device is a terminal device to which the first network device provides a network service.

In a possible implementation, the method further comprises: receiving, by the second network device, second indication information sent from the first terminal device, wherein the second indication information is used for indicating at least one of a capability of the first terminal device to receive a signal through the first frequency band, or interference information of interference caused by the second frequency band to the first frequency band; wherein sending, by the second network device, the first indication information to the first network device according to the interference caused by the second frequency band to the first frequency band, includes: determining the time-frequency resource of the first terminal device according to the interference information; and sending the first indication information to the first network device.

Interference caused by different terminal devices to different frequency bands has different impacts on different terminal devices, or capabilities of different terminal devices to receive signals may be different. The terminal device may report relevant information which is used for indicating degree of mutual interference caused by simultaneous transmission of different frequency bands. A reception sensitivity value, reception impact level, etc., of the terminal device may be reduced. The reception impact level may be fixed in advance by a protocol.

The interference information may be an interference type of the interference caused by the second frequency band to the first frequency band, and the interference type includes at least one of harmonic interference or intermodulation interference.

In other words, harmonic interference may correspond to a configuration mode of a time-frequency resource in the first frequency band, intermodulation interference may correspond to a configuration mode of a time-frequency resource in the first frequency band, and harmonic interference plus intermodulation interference may correspond to another configuration mode of a time-frequency resource in the first frequency band.

In a possible implementation, the first frequency band is a new radio (NR) carrier and the second frequency band is a long term evolution (LTE) carrier or a new radio (NR) carrier.

In a possible implementation, a cell corresponding to the second frequency band is a primary cell.

In a third aspect, there is provided a method for transmitting a signal, and the method includes: receiving, by a second network device, second indication information sent from a first terminal device, wherein the second indication information is used for indicating at least one of a capability of the first terminal device to receive a signal through a first frequency band, or interference information of interference caused by a second frequency band to a first frequency band.

In a possible implementation, the method further includes: determining, by the second network device, a time-frequency resource for transmitting a signal of the first terminal device in the first frequency band according to the second indication information.

The first frequency band may be configured for the second network device to perform signal transmission with the first terminal device, or may be configured for other network devices, such as the first network device, to perform signal transmission with the first terminal device. In other words, after the second network device determines the time-frequency resource of the first terminal device, the second network device may directly use the time-frequency resource to perform the signal transmission with the first terminal device. The indication information indicating the time-frequency resource may be sent to other network devices, so that the other network devices may use the time-frequency resource to perform signal transmission with the first terminal device.

According to isolation degrees of different terminal devices to interference, the time-frequency resource for the terminal device is determined, by which performance of the terminal device can be fully utilized, thus it is beneficial to improving the transmission reliability.

In a possible implementation, the second frequency band is used for transmitting an uplink signal.

In a possible implementation, the interference information includes at least one of degree of impact on the first terminal device by the interference caused by the second frequency band to the first frequency band, or an interference type of the interference caused by the second frequency band to the first frequency band, wherein the interference type includes at least one of harmonic interference or intermodulation interference.

In a possible implementation, the second indication information is specifically used for indicating degree of impact on the first terminal device by interference caused by the second frequency band to each frequency domain unit in the first frequency band.

In a possible implementation, the second indication information is specifically used for indicating degree of impact on the first terminal device by the interference caused by the second frequency band to a part of frequency domain resources in the first frequency band.

In a possible implementation, the capability of the first terminal device to receive the signal through the first frequency band is represented by a sensitivity value of the first terminal device to receive the signal through the first frequency band, and/or the degree of the impact is represented by an impact level corresponding to the degree of the impact.

In a possible implementation, determining, by the second network device, the time-frequency resource for transmitting the signal of the first terminal device in the first frequency band according to the second indication information, includes: determining, by the second network device, that the interference caused by the second frequency band to the first frequency band has no impact on the first terminal device according to the second indication information; and determining, by the second network device, all time-frequency resources in the first frequency band as time-frequency resources of the first terminal device.

In a possible implementation, the first frequency band is an NR carrier and the second frequency band is an LTE carrier or an NR carrier.

In a possible implementation, a cell corresponding to the second frequency band is a primary cell.

In a fourth aspect, there is provided a method for transmitting a signal, and the method comprises: sending, by a first terminal device, second indication information to a second network device, wherein the second indication information is used for indicating at least one of a capability of the first terminal device to receive a signal through a first frequency band or interference information of interference caused by a second frequency band to a first frequency band.

In a possible implementation, the second frequency band is used for transmitting an uplink signal.

In a possible implementation, the interference information includes at least one of degree of impact on the first terminal device by the interference caused by the second frequency band to the first frequency band, or an interference type of the interference caused by the second frequency band to the first frequency band, wherein the interference type includes at least one of harmonic interference or intermodulation interference.

In a possible implementation, the second indication information is specifically used for indicating degree of impact on the first terminal device by interference caused by the second frequency band to each frequency domain unit in the first frequency band.

In a possible implementation, the second indication information is specifically used for indicating degree of impact on the first terminal device by the interference caused by the second frequency band to part of frequency domain resources in the first frequency band.

In a possible implementation, the capability of the first terminal device to receive the signal through the first frequency band is represented by a sensitivity value of the first terminal device to receive the signal through the first frequency band, and/or the degree of the impact is represented by an impact level corresponding to the degree of the impact.

In a possible implementation, the first frequency band is an NR carrier and the second frequency band is an LTE carrier or an NR carrier.

In a possible implementation, a cell corresponding to the second frequency band is a primary cell.

In a possible implementation, sending, by the first terminal device, second indication information to the second network device, includes: sending, by the first terminal device, a first message to the second network device, wherein the first message carries an access capability of the first terminal device and the second indication information; or sending, by the first terminal device, the second indication information to the second network device when enabling carrier aggregation; or sending, by the first terminal device, the second indication information to the second network device when determining that a plurality of frequency bands configured for the first terminal device are capable of generating interference.

In a fifth aspect, there is provided a network device used for performing the method in the above first aspect or any possible implementation of the first aspect. The network device includes units for performing the method in the above first aspect or any possible implementation of the first aspect.

In a sixth aspect, there is provided a network device used for performing the method in the above second aspect or any possible implementation mode of the second aspect. The network device includes units used for performing the method in the above second aspect or any possible implementation mode of the second aspect.

In a seventh aspect, there is provided a network device used for performing the method in the above third aspect or any possible implementation of the third aspect. The network device includes units used for performing the method in the third aspect or any possible implementation of the above third aspect.

In an eighth aspect, there is provided a terminal device used for performing the method in the above fourth aspect or any possible implementation of the fourth aspect. The terminal device includes units for performing the method of above fourth aspect or in any possible implementation of the above fourth aspect.

In a ninth aspect, there is provided a network device. The network device includes a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to perform the method in the above first aspect or any possible implementation of the first aspect.

In a tenth aspect, there is provided a network device. The network device includes a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to perform the method in the above second aspect or any possible implementation of the second aspect.

In a eleventh aspect, there is provided a network device. The network device includes a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to perform the method in the above third aspect or any possible implementation of the third aspect.

In a twelfth aspect, there is provided a terminal device. The terminal device includes a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to perform the method in the above fourth aspect or any possible implementation of the fourth aspect.

In a thirteenth aspect, there is provided a computer storage medium used for storing computer software instructions for executing the method in the above first aspect or any possible implementation of the first aspect, or the method in the above second aspect or any possible implementation of the second aspect, or the method in the above third aspect or any possible implementation of the third aspect, or the method in the above fourth aspect or any possible implementation of the fourth aspect, and the computer software instructions include programs designed for executing the above aspects.

In a fourteenth aspect, there is provided a computer program product. The computer program product includes instructions, and when the instructions are run on a computer, the computer is caused to perform the method of the above first aspect or any one of optional implementations of the first aspect, or the method of the above second aspect or any one of optional implementations of the second aspect, or the method of the above third aspect or any one of optional implementations of the third aspect, or the method of the above fourth aspect or any one of optional implementations of the fourth aspect.

These aspects and other aspects of the present disclosure will be more simply understood in following description of implementations.

