RU2802787C1 - Method for sending two level control channels, terminal device and communication device - Google Patents

Abstract

FIELD: communications.

SUBSTANCE: selection is made from the second set of resources of the resource occupied by the control information of the second level, in which the initial symbol in the time domain of the second set of resources is the (n+k+1)-th symbol in the time block, n is 1, k is a positive integer number. The first resource set comprises a resource used to send the first layer control information, and the first layer control information occupies all the symbols occupied by the first resource set, in which the first resource set occupies from the n-th symbol to the (n+k)-th symbol in time block. The first layer control information and the second layer control information are sent. Moreover, the resource occupied by the control information of the second level is adjacent in the time domain to the resource occupied by the control information of the first level, and the initial position in the frequency domain of the resource occupied by the control information of the second level is the same as the initial position in the frequency domain of the resource occupied by the control information of first level.

EFFECT: reduced delay in decoding the control information of the second level and reduced resources for the control information.

18 cl, 17 dwg

Description

Field of technology to which the invention relates

The present application relates generally to the field of communications and, in particular, to a method for sending two layers of control channels to a terminal device and a communication device.

State of the art

In a network using long term evolution (LTE) technology proposed in the 3rd generation partnership project (3GPP), Internet of Vehicles technology for communication between a vehicle and any other objects (vehicle-to -everything, V2X). V2X communication is the communication between a vehicle and something outside the vehicle and includes many application scenarios such as vehicle to vehicle (V2V), vehicle to pedestrian , V2P), vehicle to infrastructure (V2I), and vehicle to network (V2N).

The existing V2X LTE communication uses the resource mapping method shown in FIG. 1. A transmission resource scheduled once includes one subframe in the time domain and includes one or more successive sub-channels in the frequency domain. Each subchannel includes many consecutive resource blocks (RB), for example, 10 RB. The physical sidelink control channel (PSCCH) occupies two consecutive RBs having the lowest sequence numbers in the frequency domain and is used to transmit control information, such as sidelink control information (SCI). A physical sidelink share channel (PSSCH) occupies the remaining RB in a subchannel by frequency division multiplexing (FDM) and is used to transmit data information. In the resource mapping method, the size of the physical resource occupied by the PSCCH is fixed, and one data transmission time is accompanied by one control information transmission time. The receiving side performs blind detection on all possible control channels using the sub-channel as the granularity over the entire frequency domain range, and decodes the data channel based on the correctly decoded control information to obtain data information.

In new radio (NR) V2X communication, since the frame structure is modified to support more types of services, the length of the control information is variable. Therefore, the resource mapping method described above is no longer applicable.

The essence of the invention

Embodiments of the present application provide a method for sending two layers of control channels, a terminal device and a communication device; applicable to areas such as V2X, Internet of Vehicles, intelligent connected vehicle, automated driving and intelligent driving; and solve the problem of resource mapping of the second layer control channel to guarantee the reliability of the second layer control channel, and effectively reduce the decoding delay of the second layer control channel.

To solve the above problem, this application uses the following technical solutions:

According to a first aspect, there is provided a method for sending two layers of control channels that is used in a first terminal device. The method includes: determining, in a second set of resources, a resource occupied by a second layer control channel and a resource occupied by a data channel, wherein the second set of resources is located after the first set of resources in the time domain and adjacent to the first set of resources, and the control channel the second level occupies all symbols in the second set of resources in the temporary domain; and then sending the second layer control channel and the data channel, where the average transmission power of the second layer control channel is higher than the average transmission power of the data channel.

According to the method of sending two layers of control channels provided in the first aspect, the first terminal device can determine, in a second set of resources that does not overlap the first set of resources in the time domain, a resource occupied by a second layer control channel and a resource occupied by a data channel, where the second layer control channel occupies all time domain symbols in the second resource set, and the average transmit power of the second layer control channel is higher than the average transmit power of the data channel. That is, in a scenario in which power boosting is performed on the first-layer control channel, the second-layer control channel can avoid the time domain symbol occupied by the first-layer control channel, so power boosting is further performed on the first-layer control channel, thereby increasing the probability of successful decoding control channel of the second level and increasing the reliability of the control channel of the second level. In addition, the second layer control channel occupies all symbols in the time domain in the second resource set. Thus, in a scenario in which power enhancement is performed on the second layer control channel, the adverse impact of the second layer control channel on the data link can be reduced, thereby ensuring the reliability of the data link.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries an aggregation level (AL) of the second-layer control channel. Accordingly, the method provided in the first aspect may further include: determining, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel, to further determine the amount of resources occupied by the transmission channel data.

Optionally, determining, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel may include: determining the product of the aggregation level and the minimum granularity of second-layer control channel resource scheduling as the quantity resources occupied by the second-level control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

Moreover, the method provided in the first aspect may further include: determining, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers to reduce resource waste.

In an exemplary execution method, multiple input multiple output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each of the second layer control channel and the data channel. That is, after independently performing channel encoding and data rate matching for each of the second layer control channel and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied by the second control channel, respectively. layer and data channel, thus, when multiple channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

If necessary, the method provided in the first aspect may further include: mapping, first in the frequency domain and then in the time domain, the second layer control channel to a resource occupied by the second layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

It should be noted that since the demodulation parameter (eg, MCS) and resource configuration information (eg, aggregation level) of the second layer control channel are carried on the first layer control channel, the method provided in the first aspect may further include: sending first level control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol. In addition to this, the modulation and coding parameter of the first layer control channel is also pre-configured in the network or specified in the protocol. That is, both the resource configuration information and the demodulation and decoding parameter of the first layer control channel are known, and a terminal device that receives the first layer control channel, for example, a second terminal device provided in the following second aspect can parse the first control channel layer based on resource configuration information and a first-layer control channel demodulation and decoding parameter to obtain contents of, for example, resource configuration information and a second-layer control channel modulation and encoding parameter carried on the first-layer control channel.

According to a second aspect, there is provided a method for receiving two layers of control channels that is used in a second terminal device. The method includes: receiving a second-layer control channel and a data channel, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel; then determining a resource occupied by the second layer control channel in the second resource set, and parsing the second layer control channel based on the resource occupied by the second layer control channel to obtain the resource occupied by the data channel in the second resource set, where the second resource set is located after the first set of time domain resources and adjacent to the first set of resources, and the second layer control channel occupies all symbols in the second set of time domain resources; and parsing the data channel based on the resource occupied by the data channel to obtain data carried on the data channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary execution method, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries an aggregation layer of the second-layer control channel. Accordingly, the method provided in the second aspect may further include: determining, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, an amount of resources occupied by the second-layer control channel.

Optionally, determining, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel may include: determining the product of the aggregation level and the minimum granularity of second-layer control channel resource scheduling as the quantity resources occupied by the second-level control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

Moreover, the method provided in the second aspect may further include: determining, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. Specifically, a frequency domain position of a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers. Thus, information indicating the frequency domain position of a resource occupied by a second-layer control channel may not be transmitted in order to reduce resource waste.

It should be noted that since the second-layer control channel carries a demodulation parameter and data link resource configuration information, the second terminal device must first parse the second-layer control channel and then parse the data link.

In an exemplary embodiment, after performing the FFT and removing the CP, each of the second layer control channel and the data channel may be parsed by performing a demodulation & decoding procedure in reverse order to the modulation and encoding procedure provided in the first aspect , to obtain content carried on the second layer control channel and data carried on the data link. The demodulation and decoding procedure for each second layer control channel and data channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, data rate mismatch, and channel decoding.

If necessary, in accordance with the mapping methods that relate to the second layer control channel and the data channel and that are provided in the first aspect, the method provided in the second aspect may further include: inverse mapping, first in the frequency domain and then in time domain, second-level control channel to the resource occupied by the second-level control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

It should be noted that since resource configuration information (eg, aggregation level) and demodulation parameter (eg, MCS) of the second-layer control channel are carried on the first-layer control channel, the second terminal device must first parse the first-layer control channel and then parse analyze the second-level control channel. That is, in accordance with sending a first-layer control channel provided in the first aspect, the method provided in the second aspect further includes: receiving and parsing the first-layer control channel.

The technical effects of the method provided in the second aspect are related to the technical effects of the method provided in the first aspect. In this case, the details are not described again.

According to a third aspect, a method for sending two layers of control channels is provided. The method includes: selecting a resource occupied by a second-layer control channel from a first set of resources or a second set of resources, where the first set of resources includes a resource occupied by the first-layer control channel, and the second set of resources is located after the first set of resources in a time domain. and is adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in a time domain; and then sending a first-layer control channel and a second-layer control channel.

The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol. In addition to this, the modulation and coding parameter of the first layer control channel is also pre-configured in the network or specified in the protocol. That is, both the resource configuration information and the demodulation and decoding parameter of the first layer control channel are known, and a terminal device that receives the first layer control channel, for example, the second terminal device provided in the following fourth aspect can parse the first control channel layer based on the resource configuration information and the demodulation and decoding parameter of the first layer control channel to obtain the content carried on the first layer control channel, for example, the resource and modulation configuration information and the encoding parameter of the second layer control channel.

According to the method of sending two layers of control channels provided in the third aspect, the first terminal device can select a resource occupied by a second layer control channel from a first set of resources or a second set of resources. When power boosting is not performed on the first-layer control channel, a resource occupied by the second-layer control channel may be selected from the first set of resources; or when power boosting is performed on the first layer control channel, a resource occupied by the second layer control channel can be selected from a second set of resources, thereby increasing the reliability of the second layer control channel and reducing the decoding delay of the second layer control channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, selecting a resource occupied by the second layer control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel is greater than or equal to the number of resources occupied by the second layer control channel, selecting a resource occupied by the second layer control channel from the first set of resources to further reduce the delay in decoding the second layer control channel.

Optionally, the start symbol in the time domain of a resource occupied by the second-layer control channel and the start symbol in the time domain of a resource occupied by the first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible execution method, selecting a resource occupied by the second layer control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel is less than the number of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel from the second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

It should be noted that the first-layer control channel and the second-layer control channel serve to transmit data, and the second-layer control channel carries a demodulation parameter and data channel resource configuration information. That is, in an exemplary execution method, the method provided in the third aspect may further include: obtaining, based on a resource occupied by a second-layer control channel, a resource occupied by a data channel, and sending a data channel on a resource occupied by the transmission channel data, where the resource occupied by the data channel may include: a resource selected from the first set of resources and the second set of resources and different from the resource occupied by the first level control channel, the resource occupied by the second level control channel, and the resource occupied by the reference demodulation signal.

In an exemplary execution method, multiple-input multiple-output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each of the second-layer control channel and the data channel. That is, after independently performing channel encoding and data rate matching for each of the second layer control channel and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied by the second control channel, respectively. layer and data channel, thus, when multiple channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

If necessary, the method provided in the third aspect may further include: mapping, first in the frequency domain and then in the time domain, the second layer control channel to a resource occupied by the second layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

According to a fourth aspect, there is provided a method for receiving two layers of control channels that is used in a second terminal device. The method includes: receiving a first-level control channel and a second-level control channel; then parsing the first-layer control channel to obtain a resource occupied by the second-layer control channel, wherein, in particular, the resource occupied by the second-layer control channel is selected from the first set of resources or the second set of resources, where the first set of resources includes the resource occupied by a first-level control channel, wherein the second set of resources is located after the first set of resources in the time domain and adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the time domain; and obtaining, by parsing based on the resource occupied by the second layer control channel, content carried on the second layer control channel.

The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol. In addition to this, the modulation and coding parameter of the first layer control channel is also pre-configured in the network or specified in the protocol. That is, both the resource configuration information and the demodulation and decoding parameter of the first layer control channel are known, and a terminal device that receives the first layer control channel, for example, a second terminal device provided in the following second aspect can parse the first control channel layer based on the resource configuration information and the demodulation and decoding parameter of the first layer control channel to obtain the content carried on the first layer control channel, for example, the resource and modulation configuration information and the encoding parameter of the second layer control channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the resource occupied by the second layer control channel is selected from the first resource set or the second resource set may include the following: when the difference between the total number of resources of the first resource set and the number of resources occupied by the first layer control channel, greater than or equal to the number of resources occupied by the second layer control channel, the resource occupied by the second layer control channel is selected from the first set of resources to further reduce the delay in decoding the second layer control channel.

Optionally, the start symbol in the time domain of a resource occupied by the second-layer control channel and the start symbol in the time domain of a resource occupied by the first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible execution method, the resource occupied by the second layer control channel is selected from the first set of resources or the second set of resources may include the following: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel , is less than the number of resources occupied by the second-level control channel, the resource occupied by the second-level control channel is selected from the second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

It should be noted that the first-layer control channel and the second-layer control channel serve to transmit data, and the second-layer control channel carries a demodulation parameter and data channel resource configuration information. That is, in an exemplary execution method corresponding to "obtaining, based on a resource occupied by a second-layer control channel, a resource occupied by a data channel, and sending a data channel on a resource occupied by a data channel" and provided in the third aspect, the method provided in the fourth aspect may further include: obtaining, based on a resource occupied by a second-layer control channel, a resource occupied by a data channel and a demodulation parameter; and parsing the data channel based on a resource occupied by the data channel and a demodulation parameter to obtain data carried on the data channel, where the resource occupied by the data channel may include: a resource selected from the first set of resources, and a second set of resources different from the resource occupied by the first-layer control channel, the resource occupied by the second-layer control channel, and the resource occupied by the data channel demodulation reference signal.

In an exemplary execution method, after performing the FFT and removing the CP, each of the second layer control channel and the data channel can be parsed by performing a demodulation & decoding procedure in reverse order to the modulation and encoding procedure provided in the third aspect , to obtain content carried on the second layer control channel and data carried on the data link. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding.

It should be noted that since the first-layer control channel carries the demodulation parameter and resource configuration information of the second-layer control channel, the first-layer control channel needs to be parsed first, and then the second-layer control channel can be parsed. Likewise, since the second-layer control channel carries a demodulation parameter and data link resource configuration information, the second-layer control channel needs to be parsed first, and then the data channel can be parsed.

If necessary, in accordance with the mapping methods that relate to the second layer control channel and the data channel and that are provided in the third aspect, the method provided in the fourth aspect may further include: inverse mapping, first in the frequency domain and then in time domain, second-level control channel to the resource occupied by the second-level control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

The technical effects of the method provided in the fourth aspect are related to the technical effects of the method provided in the third aspect. In this case, the details are not described again.

According to a fifth aspect, a terminal device is provided. The terminal device includes a processing module and a transceiver module. The processing module is configured to determine, in the second set of resources, a resource occupied by a second-layer control channel and a resource occupied by a data channel, where the second set of resources is located after the first set of resources in the time domain and adjacent to the first set of resources, and the control channel the second level occupies all symbols in the second set of resources in the temporary domain. The transceiver module is configured to send a second-layer control channel and a data channel, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries the aggregation layer of the second-layer control channel. Accordingly, the processing module is further configured to determine, based on the aggregation level and the minimum granularity of resource scheduling of the second layer control channel, the amount of resources occupied by the second layer control channel, to further determine the amount of resources occupied by the data channel.

If necessary, the processing module is further configured to determine the product of the aggregation level and the minimum granularity of resource scheduling of the second-level control channel as the amount of resources occupied by the second-level control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

In addition, the processing module is further configured to determine, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers to reduce resource waste.

In an exemplary embodiment, multiple-input multiple-output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each of the second-layer control channel and the data link. That is, after independently performing channel encoding and data rate matching for each of the second layer control channel and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied by the second control channel, respectively. layer and data channel, thus, when multiple channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

If necessary, the processing module is further configured to: map, first in the frequency domain and then in the time domain, the second-level control channel to a resource occupied by the second-level control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

If necessary, the terminal device provided in the fifth aspect may further include a storage module, and the storage module stores a program or instruction. When the processing unit executes a program or instruction, the terminal device provided in the fifth aspect may execute the method provided in any possible implementation of the first aspect.

It should be noted that the terminal device provided in the fifth aspect may be an independent terminal device or may be a chip or a chip system located in the terminal device. This is not limited in this application.

The technical effects of the terminal device provided in the fifth aspect are related to the technical effects of the method provided in the first aspect. In this case, the details are not described again.

According to the sixth aspect, a terminal device is provided. The terminal device includes a processing module and a transceiver module. The transceiver module is configured to receive a second-layer control channel and a data channel, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel. The processing module is configured to: determine the resource occupied by the second layer control channel in the second resource set, and parse the second layer control channel based on the resource occupied by the second layer control channel to obtain the occupied resource by the data channel in the second resource set, where the second set of resources is located after the first set of time domain resources and adjacent to the first set of resources, and the second layer control channel occupies all symbols in the second set of time domain resources. The processing module is further configured to parse the data channel based on the resource occupied by the data channel to obtain data carried on the data channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries the aggregation layer of the second-layer control channel. Accordingly, the processing module is further configured to determine, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel to further determine the amount of resources occupied by the data channel.

If necessary, the processing module is further configured to determine the product of the aggregation level and the minimum granularity of resource scheduling of the second-level control channel as the amount of resources occupied by the second-level control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

In addition, the processing module is further configured to determine, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers. Thus, information indicating a position in the frequency domain of a resource occupied by a second-layer control channel may not be transmitted in order to reduce resource waste.

In an exemplary embodiment, after performing the FF and removing the CP, each of the second layer control channel and the data channel may be parsed by performing a demodulation and decoding procedure in reverse order to the modulation and encoding procedure provided in the fifth aspect to obtain the content carried over the second layer control channel, and content carried over the data link. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, data rate denegotiation, and channel decoding.

It should be noted that since the second-layer control channel carries the demodulation parameter and the data link resource configuration information, the second-layer control channel needs to be analyzed first, and then the data link can be analyzed.

If necessary, the processing module is further configured to: reverse map, first in the frequency domain and then in the time domain, the second-level control channel onto a resource occupied by the second-level control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

It should be noted that since the resource configuration information (eg, aggregation level) and demodulation parameter (eg, MCS) of the second layer control channel are carried on the first layer control channel, the terminal device provided in the sixth aspect must first parse the control channel first level, and then parse the second level control channel. That is, the transceiver module is further configured to receive a first-layer control channel, and the processing module is further configured to parse the first-layer control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol.

If necessary, the terminal device provided in the sixth aspect may further include a storage module, and the storage module stores a program or instruction. When the processing unit executes a program or instruction, the terminal device provided in the sixth aspect may execute the method provided in any possible implementation of the second aspect.

It should be noted that the terminal device provided in the sixth aspect may be an independent terminal device or may be a chip or a chip system located in the terminal device. This application is not limited to this.

The technical effects of the terminal device provided in the sixth aspect are related to the technical effects of the method provided in the first aspect. In this case, the details are not described again.

According to the seventh aspect, a terminal device is provided. The terminal device includes a processing module and a transceiver module. The processing module is configured to select a resource occupied by the second level control channel from a first set of resources or a second set of resources, where the first set of resources includes a resource occupied by the first level control channel, and the second set of resources is located after the first set of resources in the time domain and is adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the time domain. The transceiver module is configured to send a first-level control channel and a second-level control channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In a possible design, the processing module is further configured to: when the difference between the total number of resources of the first set of resources and the number of resources occupied by the first-level control channel is greater than or equal to the number of resources occupied by the second-level control channel, selecting a resource occupied by the second-level control channel, from the first set of resources to further reduce the delay when decoding the second layer control channel.

Optionally, the start symbol in the time domain of the resource occupied by the second-layer control channel and the start symbol in the time domain of the resource occupied by the first-layer control channel are the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-level control channel can be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible design, the processing module is further configured to: when the difference between the total number of resources of the first set of resources and the number of resources occupied by the first level control channel is less than the number of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel from second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be coordinated in frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

In an exemplary embodiment, multiple-input multiple-output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each of the second-layer control channel and the data link. That is, after independently performing channel encoding and data rate matching for each of the second layer control channel and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied by the second control channel, respectively. layer and a data channel, thus, when a plurality of channels are included, the modulation and encoding procedure of the first terminal device provided in the seventh aspect can be simplified, thereby improving efficiency.

If necessary, the processing module is further configured to: map, first in the frequency domain and then in the time domain, the second-level control channel to a resource occupied by the second-level control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

If necessary, the terminal device provided in the seventh aspect may further include a storage module, and the storage module stores a program or instruction. When the processing unit executes a program or instruction, the terminal device provided in the seventh aspect may execute the method provided in any possible implementation of the third aspect.

It should be noted that the terminal device provided in the seventh aspect may be an independent terminal device or may be a chip or a chip system located in the terminal device. This is not limited in this application.

The technical effects of the terminal device provided in the seventh aspect are related to the technical effects of the method provided in the third aspect. In this case, the details are not described again.

According to the eighth aspect, a terminal device is provided. The terminal device includes a processing module and a transceiver module. The transceiver module is configured to receive a first-level control channel and a second-level control channel. The processing module is configured to parse the first-level control channel to obtain the resource occupied by the second-level control channel. Specifically, the processing module is configured to select a resource occupied by a second-level control channel from a first set of resources or a second set of resources, where the first set of resources includes a resource occupied by the first-level control channel and the second set of resources is located after the first set of resources. in the time domain and adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the time domain. The processing module is further configured to parse, based on the resources occupied by the second-level control channel, content carried on the second-level control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In a possible design, the processing module is further configured to: when the difference between the total number of resources of the first set of resources and the number of resources occupied by the first-level control channel is greater than or equal to the number of resources occupied by the second-level control channel, selecting a resource occupied by the second-level control channel, from the first set of resources to further reduce the delay when decoding the second layer control channel.

Optionally, the start symbol in the time domain of a resource occupied by the second-layer control channel and the start symbol in the time domain of a resource occupied by the first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible design, the processing module is further configured to: when the difference between the total number of resources of the first set of resources and the number of resources occupied by the first level control channel is less than the number of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel from second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

It should be noted that the first-layer control channel and the second-layer control channel serve to transmit data, and the second-layer control channel carries a demodulation parameter and data channel resource configuration information. Thus, in an exemplary embodiment, the processing module is further configured to: obtain, based on the resource occupied by the second-layer control channel, the resource occupied by the data channel and the demodulation parameter; and parsing the data channel based on the resource occupied by the data channel and the demodulation parameter to obtain data carried on the data channel. The resource occupied by the data channel may include: a resource selected from the first set of resources and the second set of resources and different from the resource occupied by the first-layer control channel, the resource occupied by the second-layer control channel, and the resource occupied by the channel demodulation reference signal data transmission.

In an exemplary embodiment, after performing the FFT and removing the CP, each of the second layer control channel and the data channel may be parsed by performing a demodulation and decoding procedure in reverse order to the modulation and encoding procedure provided in the seventh aspect to obtain the content carried over the second-level control channel, and data carried over the data link. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding.

It should be noted that since the first-layer control channel carries the demodulation parameter and resource configuration information of the second-layer control channel, the first-layer control channel needs to be parsed first, and then the second-layer control channel can be parsed. Likewise, since the second-layer control channel carries a demodulation parameter and data link resource configuration information, the second-layer control channel needs to be parsed first, and then the data channel can be parsed.

If necessary, the processing module is further configured to: reverse map, first in the frequency domain and then in the time domain, the second-level control channel onto a resource occupied by the second-level control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

The technical effects of the terminal device provided in the eighth aspect are related to the technical effects of the method provided in the third aspect. In this case, the details are not described again.

According to a ninth aspect, a communication device is provided. The communication device includes at least one processor, and the at least one processor is coupled to at least one memory. The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, such that the communication device provided in the ninth aspect carries out the method provided in any possible implementation of the first aspect to the fourth aspect.

According to the tenth aspect, a communication device is provided. The communication device includes a processor and an interface circuit. The interface circuit is configured to: receive a code instruction and transmit a code instruction to the processor. The processor is configured to execute a code instruction to carry out a method provided in any possible implementation of the first to fourth aspects.

According to the eleventh aspect, a chip system is provided. The chip system includes a processor, the processor is coupled to a memory, and the memory is configured to store a program or instruction. The chip system may further include interface circuitry, and the interface circuitry is configured to receive a code instruction and transmit the code instruction to a processor. When the program or instruction is executed by the processor, the chip system is able to implement the method provided in any possible implementation of aspects one through four.

If necessary, a chip system may have one or more processors. The processor may be implemented using hardware or may be implemented using software. When the processor is implemented using hardware, the processor may be a logic circuit, an integrated circuit, or the like. When the processor is implemented using software, the processor may be a general purpose processor and is implemented by reading software code stored in memory.

If necessary, the chip system may have one or more memory devices. The memory may be integrated with the processor or may be located separately from the processor. This is not limited in this application. For example, the memory may be a non-temporary processor, such as read-only memory (ROM). The memory and processor can be integrated into the same chip or can be located separately on different chips. The type of memory and the arrangement method of the memory and processor are not particularly limited in the present application.

According to the twelfth aspect, a machine-readable storage medium is provided. The machine-readable storage medium is configured to store instructions. When the instruction is executed, the method provided in any possible implementation of aspects one through four is implemented.

According to the thirteenth aspect, a computer program product is provided. The computer program product includes computer program code, and when the computer program code is executed on a computer, the computer is enabled to perform the method provided in any possible implementation of the first through fourth aspects.

According to the fourteenth aspect, a communication system is provided. The communication system includes a sending terminal, such as the above-mentioned first terminal device, and one or more receiving terminals, such as the above-mentioned second terminal device. The sending terminal is configured to perform the method performed by the first terminal device in the first to fourth aspects, and the receiving terminal is configured to perform the method performed by the second terminal device in the first to fourth aspects. Any one of the at least two terminal devices may be an independent terminal device, such as a mobile phone; or may be a device, module, or other component located within a terminal device, such as a chip, chip system, or on-board module.

If desired, the communication system may further include a network device, such as a base station or roadside unit (RSU).

Brief description of drawings

Figure 1 is a schematic representation of a method for mapping V2X LTE resources;

FIG. 2 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

FIG. 3 is a first flowchart of a method for sending two layers of control channels according to an embodiment of the present application; FIG.

FIG. 4 is a schematic diagram of a time block frame structure according to an embodiment of the present application; FIG.

FIG. 5 is a first schematic representation of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 6 is a second schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 7 is a third schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of a modulation and encoding procedure according to an embodiment of the present application; FIG.

FIG. 9 is a second flowchart of a method for sending two layers of control channels according to an embodiment of the present application; FIG.

FIG. 10 is a fourth schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 11 is a fifth schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 12 is a sixth schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 13 is a seventh schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 14 is an eighth schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

FIG. 15 is a ninth schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to an embodiment of the present application; FIG.

Fig. 16 is a schematic block diagram of a terminal device according to an embodiment of the present application; And

Fig. 17 is a block diagram of a communication device according to an embodiment of the present application.

Detailed Description of the Invention

To make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the following is a detailed description of the embodiments of the present application with reference to the accompanying drawings.

All aspects, embodiments, or features are presented herein by description of a system, which may include a plurality of devices, components, modules, and the like. It should be appreciated and understood that each system may include another device, component, module, or the like. and/or may not include all devices, components, modules, and the like discussed with reference to the accompanying drawings. In addition to this, a combination of these solutions can be used.

In addition, in embodiments of the present application, terms such as “for example” and “such as” are used to provide an example, illustration or description. Any embodiment or design described as an “example” in this application should not be interpreted as being preferable or having greater advantages than another embodiment or design. Thus, the term "for example" is used to represent a concept in a particular way.

In embodiments of the present application, the terms “information,” “signal,” “message,” “channel,” and “signaling” may sometimes be used interchangeably. It should be noted that the meanings expressed by these terms are uniform when the differences between these terms are not emphasized. The terms “for/of/actually”, “relevant to” and “corresponding to” can sometimes be used interchangeably. It should be noted that the meanings expressed by these terms are uniform when the differences between these terms are not emphasized

The network architecture and service scenario described in the embodiments of this application are intended to more clearly describe the technical solutions in the embodiments of this application, but are not intended to limit the technical solutions presented in the embodiments of this application. One of ordinary skill in the art will appreciate that as network architecture evolves and new service scenarios emerge, the technical solutions presented in the embodiments of this application are also applicable to similar technical problems.

The technical solutions presented in the embodiments of the present application can be used in various communication systems, such as the global system for mobile communications (GSM), code division multiple access (CDMA), system wideband code division multiple access (WCDMA), general packet radio service (GPRS), long term evolution (LTE), frequency division duplex system LTE frequency division duplex (FDD), LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access , WIMAX), 5th generation (5G) system or new radio (NR) system, future communication system or other similar communication system.

The technical solutions presented in the embodiments of this application can be used in technical areas such as unmanned driving, driver assistance (ADAS), intelligent driving, connected driving, intelligent networking driving (Intelligent network driving), short-term car rental (car sharing), smart/intelligent car (smart/intelligent car), digital car (digital car), unmanned car (unmanned car/driverless car/pilotless car/automobile), Internet of transport Internet of vehicles (IoV), self-driving car/autonomous car, cooperative vehicle infrastructure (CVIS), intelligent transport system (ITS) and communication between moving objects (vehicular communication).

In addition, the technical solutions presented in the embodiments of the present application can be used in a cellular communication link or can be used in a communication link between devices, for example, in a communication link between devices (device to device, D2D). A D2D link or a V2X link may also be called a side link, a secondary link, or the like. In embodiments of the present application, all of the above terms refer to a communication link established between devices of the same type and have the same meaning. The communication link established between devices of the same type may be a communication link between independent terminal devices, or may be a communication link between base stations, or may be a communication link between relay nodes, and the like. This is not limited to embodiments of the present application. For the communication link between terminal devices, there is a D2D communication link defined in 3GPP release (release, Rel)-12/13, and in addition there is a V2X communication link that runs from vehicle to vehicle, from vehicle to mobile phone or from vehicle to any entity as defined in 3GPP for Internet of Vehicles. The V2X link includes the V2X link defined in 3GPP Rel-14/15, as well as the V2X link defined in Rel-16, which is currently being studied in 3GPP, and the NR system-based V2X link in the later versions.

FIG. 2 is a schematic diagram of a network architecture of a communication system in which an embodiment of the present application is used. It should be noted that some of the scenarios presented in the embodiments of the present application are described using the scenario in the communication system shown in FIG. 2 as an example. It should be noted that the solutions presented in the embodiments of the present application may also be used in another mobile communication system, and the corresponding name may also be replaced by the name of the corresponding function in another mobile communication system.

As shown in FIG. 2, the communication system includes a first terminal device and a second terminal device. Terminal devices can communicate directly with each other through the PC5 interface, and the direct communication channel between terminal devices is a sidelink (SL). Sidelink-based communications may use at least one of the following channels: a physical sidelink shared channel (PSSCH), used to carry data; and a physical sidelink control channel (PSCCH) used to carry sidelink control information (SC).

Optionally, the communication system further includes a network device (not shown in FIG. 2) configured to provide time synchronization and resource scheduling for the terminal device. The network device may communicate with at least one terminal device (eg, a first terminal device) via the Uu interface. The communication line between the network device and the terminal device includes an uplink (UL) and a downlink (DL). Alternatively, terminal devices may communicate with each other indirectly through forwarding performed by the network device. For example, the first terminal device may send data to the network device through the Uu interface, the network device sends the data to the application server for processing, then the application server delivers the processed data to the network device, and the network device sends the processed data to the second terminal device. In the Uu interface-based communication method, the network device that forwards uplink data from the first terminal device to the application server and the network device that forwards downlink data delivered by the application server to the second terminal device may be the same network device, or may be different network devices and may be determined by the application server.

The network device may be a network access device, such as a base station. The access network device corresponds to different devices in different systems. For example, in a 5G system, a network access device corresponds to a network access device, such as a gNB in 5G. Although only the first terminal device and the second terminal device are shown in FIG. 2, it should be understood that the network device can serve a plurality of terminal devices, and the number of terminal devices in the communication system in the embodiments of the present application is not limited. Likewise, the terminal device shown in FIG. 2 is described using a terminal device installed on a vehicle or a vehicle as an example. In addition, it should be understood that the terminal device in embodiments of the present application is not limited to this, and alternatively, the terminal device may be a vehicle unit, a roadside device, or a portable pedestrian device. It should be understood that embodiments of the present application are not limited to use in a 4G or 5G system and may be further used in an advanced communication system.

The following is a description of certain terms used in embodiments of the present application in order to assist one skilled in the art to better understand the present invention.

(1) Terminal device

A terminal device may also be referred to as a user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and is a device that provides voice communications and/or transfer of data for the user. The terminal device may communicate with the core network via a radio access network (RAN) and exchange voice and/or data using the RAN. For example, the terminal device may be a portable device, a vehicle-mounted device, or a vehicle user equipment that has a wireless connection function. Currently, for example, a terminal device is a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, augmented reality (AR), wireless terminal in an industrial control system, wireless terminal in an automatic control system (self-drive), wireless terminal in a remote medical surgery system, wireless terminal in an intelligent energy system (smart grid), wireless terminal in a transport safety system, wireless terminal in a smart city system or wireless terminal in a smart home system. The terminal device in embodiments of the present application may alternatively be an on-board module, on-board component, on-board chip, or on-board device that is integrated into the vehicle in the form of one or more components or blocks. A vehicle may implement the method of the present application using an on-board module, on-board component, on-board chip, or on-board device built into the vehicle.

(2) Network device

A network device is a device that is on a network and that is configured to connect a terminal device to a wireless network. A network device may be a node in a radio access network, and may also be referred to as a base station or a node (or device) in a radio access network (RAN). The network device may be configured to reversibly transform a received Internet Protocol (IP) frame and packet and act as a router between the terminal device and the remainder of the access network, where the remainder of the access network may include an IP network. The network device may further coordinate control of air interface attributes. For example, a network device may include an evolved NodeB (eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), for example, micro eNodeB (micro eNB) in heterogeneous network scenario and traditional macro eNodeB (macro eNB); or may include a next generation NodeB (gNB) in a 5th generation (5G) new radio (NR) system; or may include a transmission reception point (TRP), a home base station (e.g., a home developed NodeB or a home node B (HNB)), a base band unit (BBU), a BBU pool ), or access point (AP) Wi-Fi; or may include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (CloudRAN) system. This is not limited to embodiments of the present application. As another example, the network device in V2X technology is a road side unit (RSU). An RSU may be a fixed infrastructure entity supporting a V2X application and may exchange messages with another entity supporting a V2X application.

(3) Two levels of control channels and data channels

In embodiments of the present application, two types of control information are provided: first control information and second control information. Accordingly, two layers of control channels are provided in one time block, and two layers of control channels are used to carry the first control information and the second control information, respectively. A time block is a set of resources scheduled for one data transfer time.

In particular, one time block may include one or more successive sub-channels in the frequency domain, and one sub-channel may include several successive RBs in the frequency domain. One time block may include one or more time blocks in the time domain. A time block may include a variety of possible time granularity elements, such as slot, mini-slot, subframe, radio frame, and transmission time interval (TTI). It should be understood that the throughput of a time block is not particularly limited in embodiments of the present application. The number of subchannels included in a time block and the size of each subchannel can be configured or preconfigured by the network device.

The first control information is applicable to scenarios such as broadcast, unicast and multicast, and may be the basic control information required for V2X communication. For example, the first control information may include a destination identity, a frequency domain data channel bandwidth, resource reservation information, an initial transmission time slot, and an L1 retransmission time slot. The first control information is transmitted on a first layer control channel, and the first layer control channel may be, for example, a first layer PSCCH.

The second control information is applicable to scenarios such as unicast and multicast, and may be additional link maintenance information that is required in scenarios such as unicast and multicast to improve the reliability of the communication link. For example, the second control information may include a modulation and coding scheme (MCS) of the data channel, a version number of a hybrid automatic repeat request (HARQ) of the data channel, and a new transmission indicator or retransmission of the data channel. The second control information is carried on a second layer control channel, and the second layer control channel may be, for example, a second layer PSCCH. It should be understood that in a broadcast scenario, the first terminal device may send only the first control information to the second terminal device. In unicast and multicast scenarios, the first terminal device must send first control information and second control information to the second terminal device.

The data may be specific service data sent by the first terminal device to the second terminal device in broadcast, unicast, multicast scenarios, and the like. Data is carried on a data channel in a time block, and the data channel may be, for example, a PSSCH. For example, if both the first terminal device and the second terminal device are vehicles, then the first terminal device may send certain information, such as location, speed, intent (including turning, paralleling, and reversing), and position (raising or lowering) of the first terminal device to the second terminal device.

It should be noted that the terms “system” and “network” may be used interchangeably in embodiments of the present application. "Many" means two or more. Accordingly, in embodiments of the present application, the term “multiple” should also be understood to mean “at least two.” The term "at least one" means one or more, such as one, two or more. For example, the term “include at least” means the inclusion of one, two or more elements and does not limit the number of elements included. For example, if an element "includes at least one of: A, B and C", then the element may include "A, B, C", "A and B, A", "C, B and C" or "A and B and C". Likewise, the meaning of terms such as “at least one type” is the same as the previous meaning. The term "and/or" describes an associative relationship to describe associated objects and means that three relationships can exist. For example, A and/or B can represent the following three cases: only A exists, both A and B exist, and only B exists. In addition to this, the "/" symbol typically indicates an "or" relationship between associated objects , unless otherwise specified.

Unless otherwise indicated, in embodiments of the present application, serial numbers such as “first” and “second” are used to distinguish a plurality of objects and are not intended to limit the order, timing, priority, or importance of the plurality of objects. In addition to this, the terms "first" and "second" do not indicate that the objects are completely different.

FIG. 3 is a first flowchart of a method for sending two layers of control channels according to an embodiment of the present application. The method of sending two layers of control channels is applicable to the communication system shown in FIG. 2 for maintaining communication between a first terminal device and a second terminal device. Next, a detailed description will be given of the method for sending two layers of control channels provided in the embodiments of the present application using an example in which the first terminal device is a sending terminal and the second terminal device is a receiving terminal.

As shown in FIG. 3, the method includes S301-S306.

S301: The first terminal device determines, in the second resource set, a resource occupied by a second-layer control channel and a resource occupied by a data channel.

For example, FIG. 4 is a schematic diagram of a time block frame structure according to an embodiment of the present application. Figure 4 shows only the first-level control channel and the data transmission channel. In part A shown in FIG. 4, a first-layer control channel and a data channel are mapped to all symbols in part A in a frequency division multiplexing manner. In part B shown in FIG. 4, there is only a data channel and no first-layer control channel. The resource with which the first control information is mapped in the time block is a resource occupied by a first-layer control channel and may be pre-configured by the network device.

For example, FIGS. 5 to 7 show a first schematic diagram and a third schematic diagram of resource allocation based on the frame structure shown in FIG. 4 according to embodiments of the present application. In FIGS. 5 to 7, one time block includes one time domain slot, a slot includes 14 time domain symbols, and 14 time domain symbols are numbered from 0 to 13 from left to right. A time block includes 10 RBs in the frequency domain, and the 10 RBs are numbered from 0 to 9 from top to bottom.

As shown in FIGS. 5 to 7, the position in the time domain of the last symbol included in the resource occupied by the first-layer control channel (namely, the ending position in the time domain of the resource occupied by the first-layer control channel) is used as a boundary, and the time a block can be divided into part A and part B in the time domain.

In the time domain, the resource occupied by the first layer control channel may include some or all of the time domain resources in part A. In the frequency domain, the resource occupied by the first layer control channel may include some of the frequency domain resources in part A. Typically the size resource occupied by the first-level control channel is fixed and can be represented in the figure as a rectangle including a plurality of resource blocks in a time block.

It should be understood that the initial resource block in the frequency domain of a resource occupied by a first-layer control channel may be the same as or different from the initial resource block in the frequency domain of a time block. This is not limited in this application. That is, the resource occupied by the first-layer control channel may include the topmost resource block number 0 in the time block or may not include the topmost resource block number 0 in the time block. Alternatively, it can be understood that the resource occupied by the first layer control channel may or may not be aligned with an initial position in the frequency domain of the time block.

It is further understood that the resource occupied by the first layer control channel may or may not include a resource on the first symbol in a time block, or may not include a resource on the first symbol in a time block. For example, as shown in FIG. 5, if the effect of automatic gain control (AGC) on the first level control channel is ignored, the resource occupied by the first level control channel may include the resource on the first symbol (symbol 0) in a time block, that is, the first control information may be mapped with a resource to the first symbol in the time block, or it may be understood that the first layer control channel may be mapped starting from the first symbol in the time block.

In another example, as shown in FIGS. 6 and 7, considering the influence of the AGC on the first layer control channel, the resource occupied by the first layer control channel may not include the first symbol resource (symbol 0) in the time block, and the first control the information may escape the first symbol in the time block and may be displayed starting from the second symbol (symbol 1) in the time block, or the first layer control channel may be understood to escape the first symbol in the time block and is displayed starting from the second symbol in the time block.

It should be noted that in a scenario in which the first symbol (symbol 0) in the time block is used for AGC, the dedicated AGC symbol shown in FIG. 6 may be mapped to the first symbol, or the data shown in FIG. 7 may be displayed in the first character. The allocated AGC symbol or data used for AGC is mapped with all resource blocks to the first symbol. The highlighted AGC symbol may be used to represent a sequence, for example a pseudo-random sequence, which is generated in accordance with a predetermined method and used for AGC; or displaying another functional symbol, such as duplicating or copying another symbol in a slot. The data used for the AGC may be data (valid data) that needs to be demodulated and decoded at the receiving end, or may be data (invalid data) that is only used for the AGC and that does not require demodulation and decoding at the receiving end. This is not limited to embodiments of the present application.

It should be understood that in embodiments of the present application, the resource in part A shown in FIGS. 4-7 may also be referred to as the first set of resources in a time block, and the resource in part B may also be referred to as the second set of resources in a time block. Referring to FIGS. 4 to 7, it can be learned that the second resource set is located after the first time domain resource set and adjacent to the first resource set, and the second layer control channel occupies all the symbols in the second time domain resource set. That is, the first set of resources includes a resource occupied by a first-layer control channel, and the second set of resources includes a resource occupied by a second-layer control channel.

Referring to FIGS. 5-7, the first set of resources may occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, if the first-layer control channel carries the aggregation layer of the second-layer control channel, the method shown in FIG. 3 may further include:

determining, by the first terminal device, based on the aggregation level and the minimum level of resource planning granularity of the second-layer control channel, the amount of resources occupied by the second-layer control channel, to further determine the amount of resources occupied by the data channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer. The aggregation level is the ratio of the amount of resources occupied by the second-level control channel to the minimum granularity of resource scheduling and may have a value of 1, 2, 4, 8, 32, or the like. For example, if we assume that the minimum granularity of resource scheduling is one RB in the frequency domain and may consist of all the symbols in the second set of resources in the time domain, and the aggregation level is 1, the number of resources occupied by the second layer control channel is the number of resources defined for the minimum resource scheduling granularity, that is, the resources corresponding to one RB row in the second resource set shown in either of FIGS. 5-7.

Optionally, determining, based on the level of aggregation and the minimum granularity of second layer control channel resource planning, the amount of resources occupied by the second layer control channel may include:

determining, by the first terminal device, the product of the aggregation level and the minimum granularity of resource scheduling of the second-layer control channel as the amount of resources occupied by the second-layer control channel.

In addition, if it is known that the second layer control channel is mapped starting from a predetermined position in the frequency domain, the frequency domain position of the resource occupied by the second layer control channel can be determined based on the amount of resources occupied by the second layer control channel. That is, the method shown in Fig. 3 may further include:

determining, by the first terminal device, based on the amount of resources occupied by the second layer control channel, a frequency domain position of the resource occupied by the second layer control channel in the second set of resources. Specifically, a frequency domain position of a resource occupied by a second layer control channel may be determined in a second set of resources from a given frequency domain position. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers to reduce resource waste.

After determining the resource occupied by the second layer control channel, the resource occupied by the data channel can be determined. The resource occupied by the data channel may include: a resource that is in a time block and different from the resource occupied by the first level control channel, a resource occupied by the second level control channel, a resource occupied by the demodulation reference signal (DMRS) ), the resource on the first symbol to which no valid data is mapped, and the resource on the guard interval (GAP) symbol.

FIG. 8 shows a schematic flowchart for independently performing modulation and coding on a second control channel and a data channel according to an embodiment of the present application. First, channel coding, channel multiplexing, scrambling, layer mapping, multiple-input multiple-output (MIMO) coding, and resource mapping are performed separately on the first-layer control channel and the data channel, and then An inverse fast fourier transform (IFFT) operation and a cycle prefix (CP) operation are performed on the first-layer control channel and the data channel to which resource mapping has completed. The above-mentioned step S301 of determining, by the first terminal device in the second resource set, the resource occupied by the second-layer control channel and the resource occupied by the data channel, is performed before the channel encoding step shown in FIG. 8. For channel coding, channel multiplexing, scrambling, layer mapping, MIMO coding, IFFT operation, and CP operation, reference should be made to an existing implementation. In this embodiment of the present application, details are not described.

The resource mapping shown in FIG. 8 means that the second-layer control channel and the data channel are mapped to corresponding resources. For example, a second-layer control channel may be mapped, first in the frequency domain and then in the time domain, to a resource occupied by a second-layer control channel, and a data channel may be mapped, first in the frequency domain and then in the time domain, to a resource occupied by a data transmission channel.

In other words, MIMO encoding, layer mapping and resource mapping can be performed independently in each of the second layer control channel and the data channel. That is, after independently performing channel encoding and data rate matching for each of the second layer control channel and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied, respectively, by the second control channel. layer and a data channel, thus, when a plurality of channels are included, the modulation and encoding procedure of the first terminal device provided in the seventh aspect can be simplified, thereby improving efficiency.

Optionally, the method shown in FIG. 3 may further include: mapping, first in the frequency domain and then in the time domain, the second layer control channel to a resource occupied by the second layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

In this embodiment of the present application, the first terminal device may map resources to the second layer control channel first in the frequency domain and then in the time domain in ascending order. Specifically, the first-level control channel is mapped, starting from the first resource symbol occupied by the second-level control channel, to all resource blocks in that symbol in ascending order of resource block numbers until the first-level control channel is mapped to all resource blocks per character. The first level control channel is then mapped to the next symbol. The second layer control channel is also mapped to all resource blocks of the next symbol in ascending order of resource block numbers until the second layer control channel is mapped to all resource blocks per symbol. The rest is output by analogy until the second-level control channel is mapped to all symbols of the resource occupied by the second-level control channel.

Likewise, the first terminal device may also map resources to the data channel first in the frequency domain and then in the time domain in ascending order. Specifically, the data channel is mapped starting from the first resource symbol occupied by the data channel, with all resource blocks per symbol in ascending order of resource block numbers, until the data channel is mapped with all resource blocks per symbol. The data link is then mapped to the next character. The data channel is also displayed with all resource blocks of the next symbol in ascending order of resource block numbers until the data channel is displayed with all resource blocks per symbol. The rest is output by analogy until the data channel is mapped to all symbols of the resource occupied by the data channel. Below is a detailed description with reference to FIGS. 5-7.

As shown in FIG. 5, the resource occupied by the second-layer control channel includes RBs (RB 0 and RB 1) whose RB numbers are 0 and 1, on the fourth symbol to the thirteenth symbol (symbol 3 to symbol 12) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 and RB 1 to symbol 3, RB 0 and RB 1 to symbol 4, ... and RB 0 and RB 1 to symbol 12. Likewise, the resource occupied data channel, includes RB 8 - RB 9 on the first symbol - third symbol (symbol 0 - symbol 2) and RB 2 - RB 9 on the fourth symbol - thirteenth symbol (character 3 - symbol 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 8 - RB 9 to symbol 0, RB 8 - RB 9 to symbol 1, RB 8 - RB 9 to symbol 2, RB 2 - RB 9 to symbol 3, RB 2 - RB 9 for symbol 4, ... and RB 2 - RB 9 for symbol 12.

As shown in FIG. 6, the resource occupied by the second-layer control channel includes RB 0 and RB 1 on the fifth symbol to thirteenth symbol (symbol 4 to symbol 12) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 and RB 1 to symbol 4, RB 0 and RB 1 to symbol 5, ... and RB 0 and RB 1 to symbol 12. Likewise, the resource occupied data channel, includes RB 8 - RB 9 on the second symbol - fourth symbol (symbol 1 - symbol 3) and RB 2 - RB 9 on the fifth symbol - thirteenth symbol (character 4 - symbol 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 8 - RB 9 to symbol 1, RB 8 - RB 9 to symbol 2, RB 8 - RB 9 to symbol 3, RB 2 - RB 9 to symbol 4, RB 2 - RB 9 for symbol 5, ... and RB 2 - RB 9 for symbol 12.

As shown in FIG. 7, the resource occupied by the second-layer control channel includes RB 0 and RB 1 on the fifth symbol to thirteenth symbol (symbol 4 to symbol 12) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 and RB 1 to symbol 4, RB 0 and RB 1 to symbol 5, ... and RB 0 and RB 1 to symbol 12. Likewise, the resource occupied data channel, includes all RBs (RB 0 - RB 9) on the first symbol, RB 8 - RB 9 on the second symbol - fourth symbol (character 1 - symbol 3) and RB 2 - RB 9 on the fifth symbol - thirteenth symbol (character 4 - character 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 0 - RB 9 to symbol 0, RB 8 - RB 9 to symbol 1, RB 8 - RB 9 to symbol 2, RB 8 - RB 9 to symbol 3, RB 2 - RB 9 for symbol 4, RB 2 - RB 9 for symbol 5, ... and RB 2 - RB 9 for symbol 12.

S302: The first terminal device sends a second-layer control channel and a data channel to the second terminal device, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel.

For example, the first terminal device sends a PSSCH to the second terminal device. The PSSCH carries the second layer control channel and the data channel.

It should be noted that the first terminal device may further send to the second terminal device a PSCCH corresponding to the PSSCH. The PSCCH carries the first layer control channel.

In this embodiment of the present application, when power boosting is performed on the first layer control channel, power boosting may be further performed on the second layer control channel to improve the reliability of the second layer control channel.

In addition to this, the existing protocol stipulates that the transmit power for the same symbol is fixed. That is, when power increase is performed on the second-layer control channel, it is necessary to simultaneously reduce the transmission power of the data channel which is located on the same symbol as the second-layer control channel, that is, the average transmission power of the second-layer control channel is higher than the average power data channel transmission. The average transmit power may be one of the average transmit power in each resource block RB and the average transmit power in each resource element (RE).

In addition, to allow the second layer control channel to obtain a relatively large power increase and reduce transmission power occupancy of the data channel, the second layer control channel may be mapped in a decentralized manner to all time domain symbols in the second resource set. As shown in FIGS. 5-7, the resource occupied by the second layer control channel includes all symbols in the second set of time domain resources.

It should be noted that since the resource configuration information (eg, aggregation level) and demodulation parameter (eg, MCS) of the second layer control channel are carried on the first layer control channel, the method shown in FIG. 3 may further include:

sending, by the first terminal device, a first-layer control channel to a second terminal device, wherein the resource occupied by the first-layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in a protocol.

S303: The second terminal device receives a second-layer control channel and a data channel from the first terminal device, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel.

It should be noted that since the resource configuration information (eg, aggregation level) and demodulation parameter (eg, MCS) of the second layer control channel are carried on the first layer control channel, the method shown in FIG. 3 may further include:

receiving and parsing, by a second terminal device, a first-layer control channel from the first terminal device to obtain content carried on the first-layer control channel, for example, resource configuration information and a demodulation parameter of the second-layer control channel.

S304: The second terminal device determines a resource occupied by a second-layer control channel in the second resource set.

The second set of resources is located after the first set of time domain resources and adjacent to the first set of resources, and the second layer control channel occupies all symbols in the second set of time domain resources.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary execution method, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries an aggregation layer of the second-layer control channel. Accordingly, the method shown in FIG. 3 may further include: determining, by the second terminal device, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel.

Optionally, determining, by the second terminal device, based on the aggregation level and the minimum level of planning granularity of the second-layer control channel resources, the amount of resources occupied by the second-level control channel, may include: determining, by the second terminal device, the product of the aggregation level and the minimum level of planning granularity second-layer control channel resources as the amount of resources occupied by the second-layer control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

In addition, the method shown in FIG. 3 may further include: determining, by the second terminal device, based on the amount of resources occupied by the second layer control channel, a frequency domain position of the resource occupied by the second layer control channel in the second resource set.

In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers. Thus, information indicating a position in the frequency domain of a resource occupied by a second-layer control channel may not be transmitted in order to reduce resource waste.

It should be noted that, with respect to specific implementations in which the second terminal device determines the amount of resources occupied by the second layer control channel, the time domain position of the resource occupied by the second layer control channel, and the frequency domain position of the resource occupied by the second layer control channel, it should be refer to FIGS. 4 to 7 (step S301) and corresponding text descriptions. In this case, the details are not described again.

Optionally, the method shown in FIG. 3 may further include: de-mapping, by the second terminal device first in the frequency domain and then in the time domain, the second-layer control channel onto a resource occupied by the second-layer control channel.

In an exemplary execution method, after performing the FFT and removing the CP, the second layer control channel may be parsed based on the demodulation & decoding procedure in reverse order to the modulation and encoding procedure shown in FIG. 8 to obtain the contents carried over the second-level control channel. The demodulation and decoding procedure for the second layer control channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding. For the demodulation and decoding procedure steps, refer to the corresponding contents of the modulation and encoding procedure shown in FIG. 8 (step S301). In this case, the details are not described again.

S305: The second terminal device parses the second-layer control channel based on the resource occupied by the second-layer control channel to obtain the resource occupied by the data channel in the second resource set.

It should be noted that for specific implementations in which the second terminal device determines the amount of resources occupied by the data channel, the time domain position of the resource occupied by the data channel, and the frequency domain position of the resource occupied by the data channel, see FIG. 7 (step S301) and corresponding text descriptions. In this case, the details are not described again.

In a possible execution method, after performing the FFT and removing the CP, the data channel can be parsed based on the demodulation & decoding procedure in the reverse order of the modulation and encoding procedure shown in FIG. 8 to obtain the data carried via a data channel. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding.

In addition, since the second-layer control channel further carries the data channel demodulation parameter, after executing S305, the second terminal device can further obtain the data channel demodulation parameter.

It should be noted that since the demodulation parameter (eg, MCS) and resource configuration information (eg, aggregation level) of the second-layer control channel are carried on the first-layer control channel, the method shown in FIG. 3 may further include: reception and parsing of the first-level control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol.

S306: The second terminal device parses the data channel based on the resource occupied by the data channel to obtain data carried on the data channel.

It should be noted that since the second layer control channel carries the demodulation parameter and wireless resource configuration information of the data channel, the second terminal device must first parse the second layer control channel and then parse the data channel.

If necessary, the method provided in the second aspect may further include: demapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

According to the method of sending two layers of control channels shown in FIG. 3, the first terminal device can determine, in a second set of resources that does not overlap the first set of resources in the time domain, a resource occupied by a second layer control channel and a resource occupied by a data channel. where the second layer control channel occupies all the time domain symbols in the second resource set, and the average transmit power of the second layer control channel is higher than the average transmit power of the data channel. That is, in a scenario in which power boosting is performed on the first layer control channel, the second layer control channel can avoid the time domain symbol occupied by the first layer control channel, so power boosting is further performed on the second layer control channel, thereby increasing the probability of successful decoding control channel of the second level and increasing the reliability of the control channel of the second level.

In addition, the second layer control channel occupies all symbols in the time domain in the second resource set. Thus, in a scenario in which power enhancement is performed on the second-layer control channel, it is possible to reduce the adverse impact of the second-layer control channel on the data link, thereby ensuring the reliability of the data link.

FIG. 9 is a second flowchart of a method for sending two layers of control channels according to an embodiment of the present application. The method of sending two layers of control channels is applicable to the communication system shown in FIG. 2 for maintaining communication between a first terminal device and a second terminal device. Next, a detailed description will be given of a method for sending two layers of control channels provided in the embodiments of the present application using an example in which the first terminal device is a sending terminal and the second terminal device is a receiving terminal.

As shown in FIG. 9, the method includes steps S901 to S906.

S901: The first terminal device selects a resource occupied by the second layer control channel from the first resource set or the second resource set.

Below, with reference to the time block frame structure shown in FIG. 4, a first set of resources or a second set of resources to which the method shown in FIG. 9 is applicable is described.

For example, FIGS. 10 to 12 show a fourth schematic diagram, a sixth schematic diagram of resource allocation based on the frame structure shown in FIG. 4, according to embodiments of the present application. In FIGS. 10 to 12, one time block includes one time domain slot, the slot includes 14 time domain symbols, and the 14 time domain symbols are numbered from 0 to 13 from left to right. A time block includes 20 RBs in the frequency domain, and the 20 RBs are numbered from 0 to 19 from top to bottom.

As shown in FIGS. 10 to 12, the position in the time domain of the last symbol included in the resource occupied by the first-layer control channel (namely, the ending position in the time domain of the resource occupied by the first-layer control channel) is used as a boundary, and the time a block can be divided into part A and part B in the time domain.

In the time domain, the resource occupied by the first layer control channel may include some or all of the time domain resources in part A. In the frequency domain, the resource occupied by the first layer control channel may include some of the frequency domain resources in part A. Typically the size of the resource occupied by the first-level control channel is fixed and can be represented in the figure by a rectangle including a plurality of resource blocks in a time block.

It should be understood that the initial resource block in the frequency domain of the resource occupied by the first-layer control channel may be the same or different from the initial resource block in the frequency domain of the time block. This is not limited in this application. That is, the resource occupied by the first-layer control channel may include the topmost resource block number 0 in the time block or may not include the topmost resource block number 0 in the time block. Alternatively, it can be understood that the resource occupied by the first layer control channel may or may not be aligned with an initial position in the frequency domain of the time block.

It will further be understood that the resource occupied by the first layer control channel may or may not include a resource on the first symbol in a time block, or may not include a resource on the first symbol in a time block. For example, as shown in FIG. 10, if the influence of AGC on the first layer control channel is ignored, the resource occupied by the first layer control channel may include a resource on the first symbol (symbol 0) in a time block, that is, the first control information may be mapped to the resource on the first symbol in the time block, or it may be understood that the first layer control channel can be mapped starting from the first symbol in the time block.

In another example, as shown in FIGS. 11 and 12, considering the influence of the AGC on the first layer control channel, the resource occupied by the first layer control channel may not include the first symbol resource (symbol 0) in the time block, and the first control the information may escape the first symbol in the time block and may be displayed starting from the second symbol (symbol 1) in the time block, or the first layer control channel may be understood to escape the first symbol in the time block and is displayed starting from the second symbol in the time block.

It should be noted that in a scenario in which the first symbol (symbol 0) in the time block is used for AGC, the dedicated AGC symbol shown in FIG. 11 may be mapped to the first symbol, or the data shown in FIG. 12 may be mapped to the first character. The allocated AGC symbol or data used for AGC is mapped with all resource blocks to the first symbol. The highlighted AGC symbol may be used to represent a sequence, for example a pseudo-random sequence, which is generated in accordance with a predetermined method and used for AGC; or displaying another functional symbol, such as duplicating or copying another symbol in a slot. The data used for the AGC may be data (valid data) that needs to be demodulated and decoded at the receiving end, or may be data (invalid data) that is only used for the AGC and that does not require demodulation and decoding at the receiving end. This is not limited to embodiments of the present application.

It should be understood that in embodiments of the present application, the resource in part A shown in FIGS. 10-12 may also be referred to as the first set of resources in a time block, and the resource in part B may also be referred to as the second set of resources in a time block. Referring to FIGS. 10 to 12, it can be learned that the second resource set is located after the first time domain resource set and adjacent to the first resource set, and the second layer control channel occupies all the symbols in the second time domain resource set. That is, the first set of resources includes a resource occupied by a first-layer control channel, and the second set of resources includes a resource occupied by a second-layer control channel.

Referring to FIGS. 10-12, the first set of resources may occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In this embodiment of the present application, in order to provide both reliability and delay in decoding the second layer control channel, the resource occupied by the second layer control channel may be selected from the first set of resources or the second set of resources in various scenarios based on one or more of : the total number of resources of the first set of resources, the number of resources occupied by the first-layer control channel, the number of resources occupied by the second-layer control channel, and whether power boosting is performed on the first-layer control channel.

For a method for calculating the amount of resources occupied by a second-layer control channel, see the corresponding description of step S901. In this case, the details are not described again.

In an exemplary embodiment, when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain. This solution is applicable to a scenario in which power boost is not performed on the first-layer control channel, and both the first-layer control channel and the second-layer control channel can be mapped to the first set of resources. In this scenario, the second-layer control channel cannot avoid the first-layer control channel. Thus, the second layer control channel and the first layer control channel can simultaneously occupy some resources of the first set of resources in a frequency division multiplexing mode to reduce the delay in decoding the second layer control channel.

Optionally, selecting a resource occupied by the second layer control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel is greater than or equal to the amount of resources occupied by the control channel second level, selecting a resource occupied by the second level control channel from the first set of resources. In other words, provided that the remaining resource that is in the first resource set and that is different from the resource occupied by the first-layer control channel, the resource occupied by the demodulation reference signal (DMRS), and the resource on the first symbol to which no valid data is mapped , is sufficient to carry the second layer control channel, then the second layer control channel can be mapped to the first set of resources.

In addition, the start symbol in the time domain of a resource occupied by a second-layer control channel and the start symbol in the time domain of a resource occupied by a first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel , and the resource occupied by the first-layer control channel can be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

As shown in FIG. 10, a resource occupied by a second-layer control channel may include RBs 8-12 in a first symbol and a second symbol (symbol 0 and symbol 1) in a time block. As shown in FIGS. 11 and 12, a resource occupied by a second-layer control channel may include RBs 8-12 on a second symbol and a third symbol (symbol 1 and symbol 2) in a time block.

In another possible execution method, when a resource occupied by the second-layer control channel is selected from a second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the time domain. This solution is applicable to a scenario in which power boosting is performed on the first-level control channel. The second-layer control channel must avoid the first-layer control channel, that is, the second-layer control channel must occupy a resource in the second resource set to ensure the reliability of the second-layer control channel. In this scenario, the second layer control channel may occupy a resource at a first time domain position in a second resource set, for example, occupy a resource at one or more consecutive time domain symbols at a first position in a second resource set, thereby reducing latency in decoding the control channel second level.

Optionally, selecting a resource occupied by the second level control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the amount of resources occupied by the first level control channel is less than the amount of resources occupied by the second level control channel , selecting a resource occupied by a second-layer control channel from a second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

If it is necessary that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain, it may include the following: a starting symbol in the time domain of a resource occupied by a second-layer control channel is the next symbol in the ending time domain symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

For example, FIGS. 13 to 15 show a fourth schematic diagram - a sixth schematic diagram of resource allocation based on the frame structure shown in FIG. 4, according to embodiments of the present application. Unlike Figs. 10 to 12, in Figs. 13 to 15, one time block includes 10 RBs, and the RB numbers are RB 0 to RB 9 arranged sequentially one after the other from top to bottom.

As shown in FIG. 13, the resource occupied by the second-layer control channel includes RBs 0-4 on the fourth symbol and the fifth symbol (symbol 3 and symbol 4) in the time block. As shown in FIG. 14 and FIG. 15, the resource occupied by the second-layer control channel may include RBs 0-4 on the fifth symbol and the sixth symbol (symbol 4 and symbol 5) in the time block.

After determining the resource occupied by the second layer control channel, the resource occupied by the data channel can be determined. The resource occupied by the data channel may include: a resource located in a time block and different from the resource occupied by the first-layer control channel, a resource occupied by the second-layer control channel, a resource occupied by the demodulation reference signal (DMRS), a resource on the first a symbol that does not map to valid data, and a resource on a GAP symbol.

Determination of the resource occupied by the second layer control channel and the resource occupied by the data channel may occur prior to the channel encoding step shown in FIG. 8. Resource mapping means that the second-layer control channel and the data link are mapped to corresponding resources. For example, a second layer control channel may be mapped, first in the frequency domain and then in the time domain, to a resource occupied by a second layer control channel, and a data channel may be mapped, first in the frequency domain and then in the time domain, to a resource occupied by a data transmission channel.

In this embodiment of the present application, multiple-input multiple-output (MIMO) coding, layer mapping, and resource mapping can be independently performed on each first-layer control channel, second-layer control channel, and data channel. That is, after independently performing channel encoding and data rate matching for each of the first-layer control channel, the second-layer control channel, and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied, respectively , a first-layer control channel, a second-layer control channel, and a data channel, thus, when a plurality of channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

Optionally, the method shown in FIG. 9 may further include: mapping, by the first terminal device first in the frequency domain and then in the time domain, the second layer control channel to a resource occupied by the second layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel. A detailed description is given below with reference to FIGS. 10-15.

As shown in FIG. 10, the resource occupied by the second-layer control channel includes RB 8 to RB 12 on the first symbol and the second symbol (symbol 0 and symbol 1) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 8 to RB 12 to symbol 0 and RB 8 to RB 12 to symbol 1. Likewise, the resource occupied by the data channel includes RB 13 to RB 19 to the first symbol and the second symbol (symbol 0 and symbol 1), RB 8 - RB 19 on the third symbol (symbol 2) and RB 0 - RB 19 on the fourth symbol - thirteenth symbol (symbol 3 - symbol 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 13 - RB 19 to symbol 0, RB 13 - RB 19 to symbol 1, RB 8 - RB 19 to symbol 2, RB 0 - RB 19 to symbol 3, RB 0 - RB 19 for character 4, ... and RB 0 - RB 19 for character 12.

As shown in FIG. 11, the resource occupied by the second-layer control channel includes RB 8 to RB 12 on the second symbol and the third symbol (symbol 1 and symbol 2) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 8 to RB 12 to symbol 1 and RB 8 to RB 12 to symbol 2. Likewise, the resource occupied by the data channel includes RB 13 to RB 19 to the second symbol and the third symbol (symbol 1 and symbol 2), RB 8 - RB 19 on the fourth symbol (symbol 3) and RB 0 - RB 19 on the fifth symbol - thirteenth symbol (symbol 4 - symbol 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 13 - RB 19 to symbol 1, RB 13 - RB 19 to symbol 2, RB 8 - RB 19 to symbol 3, RB 0 - RB 19 to symbol 4, RB 0 - RB 19 for character 5, ... and RB 0 - RB 19 for character 12.

As shown in FIG. 12, the resource occupied by the second-layer control channel includes RB 8 to RB 12 on the second symbol and the third symbol (symbol 1 and symbol 2) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 8 to RB 12 to symbol 1 and RB 8 to RB 12 to symbol 2. Likewise, the resource occupied by the data channel includes RB 0 to RB 19 to first character (character 0), RB 13 - RB 19 on the second character and third character (character 1 and character 2), RB 8 - RB 19 on the fourth character (character 3) and RB 0 - RB 19 on the fifth character - thirteenth character (character 4 - character 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 0 - RB 19 to symbol 0, RB 13 - RB 19 to symbol 1, RB 13 - RB 19 to symbol 2, RB 8 - RB 19 to symbol 3, RB 0 - RB 19 for character 4, RB 0 - RB 19 for character 5, ... and RB 0 - RB 19 for character 12.

As shown in FIG. 13, the resource occupied by the second-layer control channel includes RB 0 to RB 4 on the fourth symbol and the fifth symbol (symbol 3 and symbol 4) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 to RB 4 to symbol 3 and RB 0 to RB 4 to symbol 4. Likewise, the resource occupied by the data channel includes RB 8 to RB 9 to first character - third character (character 0 - character 2), RB 5 - RB 9 on the fourth character and fifth character (character 3 and character 4) and RB 0 - RB 9 on the sixth character - thirteenth character (character 5 - character 12) in a time block. In this case, the first terminal device sequentially maps the data channel from RB 8 - RB 9 to symbol 0, RB 8 - RB 9 to symbol 1, RB 8 - RB 19 to symbol 2, RB 5 - RB 9 to symbol 3, RB 5 - RB 9 for character 4, RB 0 - RB 9 for character 5, ... and RB 0 - RB 9 for character 12.

As shown in FIG. 14, the resource occupied by the second-layer control channel includes RB 0 to RB 4 on the fifth symbol and the sixth symbol (symbol 4 and symbol 5) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 to RB 4 to symbol 4 and RB 0 to RB 4 to symbol 5. Likewise, the resource occupied by the data channel includes RB 8 to RB 9 to second character - fourth character (character 1 - character 3), RB 5 - RB 9 on the fifth character and sixth character (character 4 and character 5) and RB 0 - RB 9 on the seventh character - thirteenth character (character 6 - character 12) in a time block. In this case, the first terminal device sequentially maps the data channel from RB 8 - RB 9 to symbol 1, RB 8 - RB 9 to symbol 2, RB 8 - RB 9 to symbol 3, RB 5 - RB 9 to symbol 4, RB 5 - RB 9 for character 5, RB 0 - RB 9 for character 6, ... and RB 0 - RB 9 for character 12.

As shown in FIG. 15, the resource occupied by the second-layer control channel includes RB 0 to RB 4 on the fifth symbol and the sixth symbol (symbol 4 and symbol 5) in the time block. In this case, the first terminal device sequentially maps the second-layer control channel from RB 0 to RB 4 to symbol 4 and RB 0 to RB 4 to symbol 5. Likewise, the resource occupied by the data channel includes RB 0 to RB 9 to first character (character 0), RB 8 - RB 9 on second character - fourth character (character 1 to character 3), RB 5 - RB 9 on fifth character and sixth character (character 4 and character 5) and RB 0 - RB on seventh character - thirteenth character (character 6 - character 12) in the time block. In this case, the first terminal device sequentially maps the data channel from RB 0 - RB 9 to symbol 0, RB 8 - RB 9 to symbol 1, RB 8 - RB 9 to symbol 2, RB 8 and RB 9 to symbol 3, RB 5 - RB 9 for character 4, RB 5 - RB 9 for character 5, RB 0 - RB 9 for character 6, ... and RB 0 - RB 9 for character 12.

S902: The first terminal device sends a first-layer control channel and a second-layer control channel to the second terminal device.

For example, the first terminal device may send PSCCH and PSSCH to the second terminal device. The PSCCH carries a first-layer control channel, and the PSSCH carries a second-layer control channel and a data channel.

S903: The second terminal device receives a first-layer control channel and a second-layer control channel from the first terminal device.

For example, the second terminal device may receive a first-layer control channel and a second-layer control channel on a sidelink.

S904: The second terminal device parses the first-layer control channel to obtain the resource occupied by the second-layer control channel.

The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol. In other words, the resource occupied by the first-level control channel is known. In addition, the first-layer control channel is generally transmitted in a broadcast mode, and a modulation and coding scheme for the first-layer control channel is also known. In other words, the second terminal device can perform demodulation and decoding on the first layer control channel based on the resource occupied by the first layer control channel and the modulation and encoding scheme to obtain contents such as resource configuration information and a demodulation parameter of the second layer control channel, transmitted over the first level control channel.

In an exemplary embodiment, the second terminal device may select, from the first set of resources or the second set of resources, a resource occupied by a second-layer control channel, where the first set of resources includes a resource occupied by a first-layer control channel, wherein the second set of resources is located after the first set resources in the time domain and adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the time domain.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, selecting a resource occupied by the second layer control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel is greater than or equal to the number of resources occupied by the second layer control channel, selecting a resource occupied by the second layer control channel from the first set of resources to further reduce the delay in decoding the second layer control channel.

Optionally, the start symbol in the time domain of a resource occupied by the second-layer control channel and the start symbol in the time domain of a resource occupied by the first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible execution method, selecting a resource occupied by the second layer control channel from the first set of resources or the second set of resources may include: when the difference between the total amount of resources of the first set of resources and the number of resources occupied by the first level control channel is less than the number of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel from the second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

It should be noted that for specific implementations in which the second terminal device determines the amount of resources occupied by the second layer control channel, the time domain position of the resource occupied by the second layer control channel and the frequency domain position of the resource occupied by the second layer control channel refer to FIGS. 10-15 (step S901) and corresponding text descriptions. In this case, the details are not described again.

S905: The second terminal device parses the second-layer control channel based on the resources occupied by the second-layer control channel to obtain content carried on the second-layer control channel.

The content carried on the second layer control channel may include a resource occupied by the data channel and a demodulation parameter. It should be noted that for specific implementations in which the second terminal device determines the amount of resources occupied by the data channel, the time domain position of the resource occupied by the data channel and the frequency domain position of the resource occupied by the data channel refer to FIG. -15 (step S901) and corresponding text descriptions. In this case, the details are not described again.

In an exemplary execution method, after performing the FFT and removing the CP, the second layer control channel can be parsed by performing a demodulation & decoding procedure in the reverse order of the modulation and encoding procedure shown in FIG. 8 to obtain the contents carried over the second-level control channel. The demodulation and decoding procedure for a data channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatching, and channel decoding.

It should be noted that the first-layer control channel and the second-layer control channel serve to transmit data, and the second-layer control channel carries a demodulation parameter and data channel resource configuration information. The data link resource configuration information is used to obtain the resource occupied by the data link. The resource occupied by the data channel may include: a resource selected from the first set of resources and the second set of resources and different from the resource occupied by the first-layer control channel, the resource occupied by the second-layer control channel, and the resource occupied by the channel demodulation reference signal data transmission.

S906: The second terminal device parses the data channel based on the resource occupied by the data channel to obtain data carried on the data channel.

In a possible execution method, after performing the FFT and removing the CP, the data channel can be parsed by performing a demodulation & decoding procedure in the reverse order of the modulation and encoding procedure shown in FIG. 8 to obtain the data carried via a data transmission channel. The demodulation and decoding procedure for a data channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatching, and channel decoding.

According to the method of sending two layers of control channels shown in FIG. 9, the first terminal device can select a resource occupied by a second layer control channel from a first set of resources or a second set of resources. When power boosting is not performed on the first-layer control channel, a resource occupied by the second-layer control channel may be selected from the first set of resources; or when power enhancement is performed on the first-layer control channel, the resource occupied by the second-layer control channel can be selected from the second set of resources, so the reliability of the second-layer control channel is ensured, and the decoding delay of the second-layer control channel can be reduced.

Above, with reference to FIGS. 3-15, a method for sending two layers of control channels provided in embodiments of the present application has been described in detail. Next, a detailed description will be given of a terminal device provided in the embodiments of the present application with reference to FIG. 16, and a detailed description of a communication device provided in the embodiments of the present application with reference to FIG. 17.

For example, FIG. 16 shows a schematic block diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 16, the terminal device 1600 includes a transceiver module 1610 and a processing module 1620. The terminal device 1600 may be configured to implement the functions of the first terminal device or the second terminal device presented in the above method embodiments. The terminal device 1600 may be an independent terminal device, such as a portable terminal device, a vehicle-mounted terminal device, or a vehicle user equipment; or may be a chip included in the terminal device; or the terminal device 1600 is an on-board device, such as an on-board module or an on-board unit built into a vehicle.

In an exemplary embodiment, when the terminal device 1600 shown in FIG. 16 is used as the first terminal device to perform the embodiment of the method shown in FIG. 3, the processing module 1620 is configured to determine, in the second resource set, a resource occupied by the channel a second layer control, and a resource occupied by a data channel, wherein the second set of resources is located after the first set of time domain resources and is adjacent to the first set of resources, and the second layer control channel occupies all symbols in the second set of time domain resources.

The transceiver module 1610 is configured to send a second-layer control channel and a data channel where the average transmit power of the second-layer control channel is higher than the average transmit power of the data channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries the aggregation layer of the second-layer control channel. Accordingly, the processing module 1620 is further configured to determine, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel, to further determine the amount of resources occupied by the data channel.

If necessary, the processing module 1620 is further configured to determine the product of the aggregation level and the minimum granularity of second-layer control channel resource scheduling as the amount of resources occupied by the second-layer control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

In addition, the processing unit 1620 is further configured to determine, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers to reduce resource waste.

In an exemplary design, multiple-input multiple-output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each first-layer control channel, second-layer control channel, and data link. That is, after independently performing channel encoding and data rate matching for each of the first-layer control channel, the second-layer control channel, and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied, respectively , a first-layer control channel, a second-layer control channel, and a data channel, thus, when a plurality of channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

If necessary, the processing module 1620 is further configured to: map, first in the frequency domain and then in the time domain, the second-layer control channel to a resource occupied by the second-layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

In another possible embodiment, when the terminal device 1600 shown in FIG. 16 is used as a second terminal device to perform the embodiment of the method shown in FIG. 3, the transceiver module 1610 is configured to receive a second layer control channel and a data channel, where the average transmission power of the second-layer control channel is higher than the average transmission power of the data channel; the processing module 1620 is configured to: determine a resource occupied by a second-layer control channel in a second set of resources, and parse the second-layer control channel based on the resource occupied by a second-layer control channel to obtain a resource occupied by a data channel in the second set of resources where the second set of resources is located after the first set of time domain resources and adjacent to the first set of resources, and the second layer control channel occupies all symbols in the second set of time domain resources; and the processing unit 1620 is further configured to parse the data channel based on the resource occupied by the data channel to obtain data carried on the data channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the first set of resources includes a resource occupied by a first-layer control channel, and the first-layer control channel carries the aggregation layer of the second-layer control channel. Accordingly, the processing module 1620 is further configured to determine, based on the aggregation level and the minimum granularity of second-layer control channel resource scheduling, the amount of resources occupied by the second-layer control channel, to further determine the amount of resources occupied by the data channel.

If necessary, the processing module 1620 is further configured to determine the product of the aggregation level and the minimum granularity of second-layer control channel resource scheduling as the amount of resources occupied by the second-layer control channel.

The minimum resource scheduling granularity may be N resource blocks RBs in the frequency domain and may be all symbols in the second set of resources in the time domain, where N is a positive integer.

In addition, the processing unit 1620 is further configured to determine, based on the amount of resources occupied by the second layer control channel, a position in the frequency domain of the resource occupied by the second layer control channel in the second set of resources. In particular, a resource occupied by a second-layer control channel may be determined in a second resource set in accordance with a predetermined rule. For example, the second layer control channel may occupy, starting with the lowest numbered resource block, one or more resource blocks in the second set of resources in ascending order of resource block numbers. Thus, information indicating a position in the frequency domain of a resource occupied by a second-layer control channel may not be transmitted in order to reduce resource waste.

In a possible implementation, after performing the FFT and removing the CP, each of the second layer control channel and the data channel can be parsed by performing a demodulation & decoding procedure in reverse order of the modulation and encoding procedure to obtain the content carried over the second layer control channel, and content carried over the data link. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding.

It should be noted that since the second layer control channel carries the demodulation parameter and wireless resource configuration information of the data channel, the second layer control channel must first be parsed first, and then the data channel can be parsed.

If necessary, the processing module 1620 is further configured to: reverse map, first in the frequency domain and then in the time domain, the second-layer control channel to a resource occupied by the second-layer control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

It should be noted that since resource configuration information (eg, aggregation level) and demodulation parameter (eg, MCS) of the second layer control channel are carried on the first layer control channel, the terminal device 1600 shown in FIG. 16 must first parse the channel first-level control and then parse the second-level control channel. Thus, the transceiver module 1610 is further configured to receive a first-layer control channel. The processing module 1620 is further configured to parse a first-layer control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol.

In yet another possible embodiment, when the terminal device 1600 shown in FIG. 16 is used as the first terminal device to perform the embodiment of the method shown in FIG. 9, the processing module 1620 is configured to select from the first set of resources or the second set resources, a resource occupied by a second-layer control channel, wherein the first set of resources includes a resource occupied by the first-layer control channel, and the second set of resources is located after the first set of resources in a time domain and adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in a time domain; And

transceiver module 1610 is configured to send a first layer control channel and a second layer control channel.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the processing module 1620 is further configured to: when the difference between the total amount of resources of the first set of resources and the amount of resources occupied by the first level control channel is greater than or equal to the amount of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel , from the first set of resources to further reduce the delay when decoding the second layer control channel.

Optionally, the start symbol in the time domain of the resource occupied by the second-layer control channel and the start symbol in the time domain of the resource occupied by the first-layer control channel are the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible design, the processing module 1620 is further configured to: when the difference between the total amount of resources of the first set of resources and the amount of resources occupied by the first level control channel is less than the amount of resources occupied by the second level control channel, select a resource occupied by the second level control channel, from the second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel and the second set of resources may be aligned at frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

In an exemplary design, multiple-input multiple-output (MIMO) encoding, layer mapping, and resource mapping may be performed independently on each first-layer control channel, second-layer control channel, and data link. That is, after independently performing channel encoding and data rate matching for each of the first-layer control channel, the second-layer control channel, and the data channel, MIMO encoding, layer mapping, and resource mapping can be performed independently on the resources occupied, respectively , a first-layer control channel, a second-layer control channel, and a data channel, thus, when a plurality of channels are included, the modulation and encoding procedure of the first terminal device can be simplified, thereby increasing efficiency.

If necessary, the processing module 1620 is further configured to: map, first in the frequency domain and then in the time domain, the second-layer control channel to a resource occupied by the second-layer control channel; and mapping, first in the frequency domain and then in the time domain, the data channel onto a resource occupied by the data channel.

In yet another possible embodiment, when the terminal device 1600 shown in FIG. 16 is used as a first terminal device to perform the method embodiment shown in FIG. 9, the transceiver module 1610 is configured to receive a first-level control channel and a second-level control channel. level; and processing module 1620 is configured to parse the first-layer control channel to obtain a resource occupied by the second-layer control channel, where, in particular, processing module 1620 is configured to select a resource occupied by the second-layer control channel from the first set of resources or the second set resources, where the first set of resources includes a resource occupied by a control channel of the first layer, and the second set of resources is located after the first set of resources in the temporary domain and adjacent to the first set of resources; and when a resource occupied by the second-layer control channel is selected from the first set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in the frequency domain; or when a resource occupied by the second-layer control channel is selected from the second set of resources, the resource occupied by the second-layer control channel is adjacent to the resource occupied by the first-layer control channel in a time domain; and the processing module 1620 is further configured to parse, based on the resources occupied by the second layer control channel, content carried on the second layer control channel. The resource occupied by the first layer control channel is located in the first resource set and is typically a resource pre-configured in the network or specified in the protocol.

For example, the first set of resources can occupy from the nth character up to (n+k)th symbol in the time block, and the starting symbol in the time domain of the second resource set is the (n+k+1)th character in a time block where n is 0 or 1 and k is a positive integer. In this way, information indicating a starting position in the temporary domain of the second set of resources can be stored, so resource wastage is reduced.

In an exemplary embodiment, the processing module 1620 is further configured to: when the difference between the total amount of resources of the first set of resources and the amount of resources occupied by the first level control channel is greater than or equal to the amount of resources occupied by the second level control channel, selecting a resource occupied by the second level control channel , from the first set of resources to further reduce the delay when decoding the second layer control channel.

Optionally, the start symbol in the time domain of a resource occupied by the second-layer control channel and the start symbol in the time domain of a resource occupied by the first-layer control channel may be the same symbol in the time domain, that is, the resource occupied by the second-layer control channel, and the resource occupied by the first-layer control channel may be aligned in the time domain. In this way, indication information indicating the start symbol in the temporary area of the resource occupied by the second-layer control channel can be stored, so resource wastage is reduced.

In another possible implementation, the processing module 1620 is further configured to: when the difference between the total amount of resources of the first set of resources and the amount of resources occupied by the first level control channel is less than the amount of resources occupied by the second level control channel, select a resource occupied by the second level control channel, from the second set of resources. That is, when the first set of resources is insufficient to carry both the first layer control channel and the second layer control channel, a resource occupied by the second layer control channel may be selected from the second set of resources. When power boosting is performed on the first-layer control channel, a time-domain symbol occupied by the first-layer control channel can be avoided, thereby improving the reliability of the second-layer control channel.

In addition, that a resource occupied by a second-layer control channel is adjacent to a resource occupied by a first-layer control channel in the time domain may include the following: a leading symbol in the time domain of a resource occupied by a second-layer control channel is the following symbol in the time domain of the final symbol in the time domain of the resource occupied by the first-layer control channel, that is, the second-layer control channel is mapped starting from the next symbol in the time domain occupied by the first-layer control channel, thus the second-layer control channel is sent as early as possible, thus thereby reducing the delay when decoding the second-level control channel.

In addition, the starting position in the frequency domain of the resource occupied by the second-layer control channel may be the same as the starting position in the frequency domain of the resource occupied by the first-layer control channel, that is, the resource occupied by the second-layer control channel and the resource occupied by the channel first level controls can be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

Likewise, the starting position in the frequency domain of the resource occupied by the second layer control channel may alternatively be the same as the starting position in the frequency domain of the second set of resources, that is, the resource occupied by the second layer control channel. the channel and the second set of resources may be aligned in the frequency domain. In this way, indication information indicating a starting position in the frequency domain of a resource occupied by a second-layer control channel can be stored, so resource wastage is reduced.

It should be noted that the first-layer control channel and the second-layer control channel serve to transmit data, and the second-layer control channel carries a demodulation parameter and data channel resource configuration information. Thus, in an exemplary embodiment, the processing module 1620 is further configured to: obtain, based on the resource occupied by the second layer control channel, the resource occupied by the data channel and the demodulation parameter; and parsing the data channel based on a resource occupied by the data channel and a demodulation parameter to obtain data carried on the data channel, where the resource occupied by the data channel may include: a resource selected from the first set of resources, and a second set of resources different from the resource occupied by the first-layer control channel, the resource occupied by the second-layer control channel, and the resource occupied by the data channel demodulation reference signal.

In an exemplary embodiment, after performing the FFT and removing the CP, each of the second layer control channel and the data channel may be parsed based on a demodulation & decoding procedure in reverse order to the modulation and encoding procedure provided in the third aspect. to receive content carried on the second layer control channel and data carried on the data link. The demodulation and decoding procedure for each channel may sequentially include the following steps: resource demapping, MIMO decoding, layer demapping, descrambling, channel demultiplexing, bit rate mismatch, and channel decoding.

It should be noted that since the first-layer control channel carries the demodulation parameter and resource configuration information of the second-layer control channel, the first-layer control channel needs to be parsed first, and then the second-layer control channel can be parsed. Likewise, since the second-layer control channel carries a demodulation parameter and data link resource configuration information, the second-layer control channel needs to be parsed first, and then the data channel can be parsed.

If necessary, the processing module 1620 is further configured to: reverse map, first in the frequency domain and then in the time domain, the second-layer control channel to a resource occupied by the second-layer control channel; and back-mapping, first in the frequency domain and then in the time domain, the data channel to a resource occupied by the data channel.

To describe the technical effects of the terminal device 1600 shown in FIG. 16, reference should be made to a description of the technical effects of the method provided in the third aspect. In this case, the details are not described again.

Optionally, the terminal device 1600 shown in FIG. 16 may further include a memory module (not shown in FIG. 16), and the memory module stores a program or instruction. When the processing unit 1620 executes a program or instruction, the terminal device 1600 shown in FIG. 16 may execute the method of sending two layers of control channels shown in FIG. 3 or FIG. 9.

It should be noted that the terminal device 1600 shown in FIG. 16 may be an independent terminal device or may be a chip or chip system located in the terminal device. This is not limited in this application.

To describe the technical effects of the terminal device 1600 shown in FIG. 16, refer to the description of the technical effects of the method of sending two layers of control channels shown in FIG. 3 or FIG. 9. In this case, the details are not described again.

The terminal device 1600 shown in FIG. 16 may also be referred to as a communications device. The processing module 1620 in the communication device may be implemented by a processor or a circuit component coupled to a processor, and may be a processor or a processing unit. Transceiver module 1610 may be implemented by a transceiver or a circuit component associated with a transceiver, and may be a transceiver or a transceiver unit. The operation and/or function of each module in the communication device is used to implement a corresponding procedure of the method shown in FIG. 3 or FIG. 9. For brevity, the details are not re-described here.

FIG. 17 is a block diagram of a communication device according to an embodiment of the present application. As shown in FIG. 17, the communication device may in particular be a terminal device, such as the terminal device shown in FIG. 16. For ease of understanding and illustration, a mobile phone is used as an example of a communication device shown in FIG. 17. As shown in FIG. 17, communication device 1700 includes a processor and may further include memory. Of course, the communication device 1700 may further include radio frequency circuitry, an antenna, an input/output device, or the like. The processor is generally configured to: process a communication protocol and communication data, control a communication device 1700, execute a software program, process software program data, etc. Memory is primarily used to store software and data. The RF circuit is generally configured to: perform conversion between a baseband signal and an RF signal, and process the RF signal. The antenna is generally configured to send and receive a radio frequency signal in the form of an electromagnetic wave. An input/output device, such as a touch screen, display, or keyboard, is generally configured to: receive data input by a user and output data to the user. It should be noted that some types of communication devices 1700 may not have an input/output device.

When data needs to be sent, after performing baseband processing on the data to be sent, the processor outputs the baseband signal to the RF circuit; and the RF circuit performs RF processing on the baseband signal, and then sends the RF signal outward as an electromagnetic wave through the antenna. When data is sent to communication device 1700, the RF circuitry receives the RF signal through an antenna, converts the RF signal to a baseband signal, and outputs the baseband signal to a processor. The processor converts the baseband signal into data and processes the data. For ease of description, only one memory and one processor are shown in FIG. 17. The actual communication device 1700 may have one or more processors and one or more memory devices. Memory may also be referred to as a storage medium, storage device, or the like. The memory may be located independently of the processor or may be integrated with the processor. This is not limited to this embodiment of the present application.

In this embodiment of the present application, an antenna and an RF circuit that have transmission and reception functions may be considered as a transceiver unit of the communication device 1700, and a processor that has a processing function may be considered a processing unit of the communication device 1700. As shown in FIG. 17, the communication device 1700 includes a transceiver unit 1710 and a processing unit 1720. The transceiver unit 1710 may also be referred to as a transceiver, transceiver machine, transceiver device, transceiver circuit, or the like. The processing unit 1720 may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a component that is located in the transceiver block 1710 and that is configured to implement a receiving function can be considered a receiving block, and a component that is located in a transceiver block 1710 that is configured to implement a sending function can be considered a sending block. In other words, the transceiver block 1710 includes a receiving block and a sending block. The receiving unit may also sometimes be called a receiving machine, a receiver, a receiving device, a receiver circuit, or the like. A transmission unit may also sometimes be called a transmission machine, transmitter, transmission device, transmitter circuit, or the like. It should be understood that the transceiver unit 1710 is configured to perform a sending operation and a receiving operation on the terminal device side in the above embodiment of the method, and the processing unit 1720 is configured to perform an operation other than the sending operation and receiving operation on the terminal device side in the above embodiment. implementation of the method.

An embodiment of the present application further provides a chip system including a processor. The processor is connected to a memory, the memory is configured to store a program or instruction, and when the program or instruction is executed by the processor, the chip system allows the method to be implemented in any of the embodiments of the above method.

If necessary, the chip system may have one or more processors. The processor may be implemented using hardware or may be implemented using hardware. When the processor is implemented using hardware, the processor may be a logic circuit, an integrated circuit, or the like. When the processor is implemented using software, the processor may be a general purpose processor and is implemented by reading software code stored in memory.

If necessary, the chip system may have one or more memory devices. The memory may be integrated with the processor or may be located separately from the processor. This is not limited in this application. For example, the memory may be a non-volatile processor, such as read-only memory (ROM). The memory and processor can be integrated into the same chip or can be located separately on different chips. The type of memory and the arrangement method of the memory and processor are not particularly limited in the present application.

For example, a chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a central processor unit. , CPU), network processor (NP), digital signal processor (DSP), microcontroller unit (MCU), programmable logic device (PLD), or other integrated circuit.

It should be understood that the steps in the above method embodiments may be implemented using a hardware integrated logic circuit in a processor or instructions in the form of software. The steps of the method disclosed with reference to embodiments of the present application may be performed directly by a hardware processor or may be performed using a combination of hardware in the processor and a software module.

An embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores machine-readable instructions. When the computer reads and executes the machine-readable instruction, the computer is able to perform the method of any of the embodiments of the foregoing method.

An embodiment of the present application further provides a computer program product. When a computer reads and executes a computer program product, the computer is able to perform a method in any of the above method embodiments.

An embodiment of the present application further provides a communication system. The communication system includes a sending terminal, such as the above-mentioned first terminal device, and one or more receiving terminals, such as the above-mentioned second terminal device. The sending terminal is configured to perform the function of the first terminal device in the above-described method embodiment, and the receiving terminal is configured to perform the function of the second terminal device in the above-described method embodiment. Any one of the at least two terminal devices may be an independent terminal device, such as a mobile phone; or may be a device, module, or other component located within a terminal device, such as a chip, chip system, or on-board module.

If desired, the communication system may further include a network device, such as a base station or roadside unit (RSU).

It should be understood that the processor referred to in embodiments of the present application may be a central processing unit (CPU), and may alternatively be another general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete logic gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor may be a microprocessor, or the processor may be any general processor, or the like.

In addition, it should be understood that the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile memory and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable PROM (EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), or flash memory. memory. Non-volatile memory can be random access memory (RAM) used as an external cache. By way of exemplary descriptions, and not restrictive descriptions, numerous forms of RAM may be used, for example, static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic random access memory (SDRAM), synchronous dynamic random access memory (SDRAM). Double data rate SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous dynamic random access memory (synchronous DRAM, SLDRAM) and direct rambus RAM , DR RAM).

It should be noted that when the processor is a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete logic gate or transistor logic device, or discrete hardware component, the memory (memory module) is integrated into the processor.

It should be noted that the memory described in this specification is intended to be included, but not limited to, these storage devices and any other suitable type of memory.

It should be understood that the serial numbers of the above-described processes do not indicate the sequence of execution in the various embodiments of the present application. Process execution sequences should be determined based on the functions and internal logic of the processes and should not be construed as any limitation on the processes for implementing embodiments of the present invention.

One skilled in the art will recognize that, in combination with the examples described in the embodiments disclosed herein, the blocks and steps of the algorithm may be implemented using electronic hardware or a combination of computer software and electronic hardware. Whether functions are performed by hardware or software depends on the specific applications and design limitations of the technical solutions. Various methods may be used by one skilled in the art to implement the described functions in each particular application, but this should not be construed as an implementation beyond the scope of this application.

One skilled in the art can clearly understand that, for the purpose of convenient and concise description, the detailed operating processes of the above-mentioned system, apparatus and unit refer to the corresponding processes in the above-mentioned method embodiments, and the details will not be described again here.

It should be understood that in several embodiments presented herein, the disclosed system, apparatus, and method may be implemented in other ways. For example, the described embodiments of the device are merely examples. For example, blocking is simply a logical division of functions and may be a different division in real implementations. For example, many blocks or components may be combined or integrated into another system, or some functions may be ignored or not implemented. In addition, the displayed or discussed mutual connections, or direct connections or communication connections may be implemented through some interfaces. Indirect connections or communication connections between devices or units can be implemented in electrical, mechanical or other forms.

Blocks described as separate parts may or may not be physically separate, and parts depicted as blocks may or may not be physical blocks, may be located in one location, or may be distributed across multiple network blocks. Some or all of the blocks may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional blocks in embodiments of the present application may be integrated into a single processing unit, or each of the blocks may physically exist separately, or two or more blocks may be integrated into a single block.

When functions are implemented as a functional block of software and sold or used as an independent product, the functions may be stored on a computer-readable storage medium. Based on this understanding, the technical solutions of the present application, in whole or in part complementing the prior art, or some of the technical solutions, can be implemented in the form of a software product. The software product is stored in a storage medium and includes a number of instructions for directing a computing device (which may be a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the embodiments of the present application. The above-mentioned storage medium includes: any storage medium on which program code can be stored, such as a USB flash drive, a removable hard drive, a read-only memory (ROM), a random access memory (RAM) ), magnetic disk or optical disk.

The above descriptions are merely specific implementations of the present application and are not intended to limit the scope of the present application. Any variation or substitution readily calculated by one skilled in the art within the technical scope disclosed in this application shall fall within the scope of protection of this application. Therefore, the scope of protection of the present application should correspond to the scope of protection of the claims.

Claims (32)

1. A method for sending control information, the method comprising: selecting, from a second set of resources, a resource occupied by control information of a second layer, wherein the initial symbol in the time domain of the second set of resources is the (n+k+1)th symbol in the time block, n is 1, k is a positive integer , the first resource set contains a resource used to send first-level control information, and the first-level control information occupies all symbols occupied by the first resource set, in which the first resource set occupies from the nth symbol to the (n+k)th symbol in time block; And sending the first level control information and the second level control information, in which the resource occupied by the second level control information is adjacent, in the time domain, to the resource occupied by the first level control information, and the starting position in the frequency domain of the resource occupied by the second level control information, is the same as the starting position in the frequency domain of the resource occupied by the first-level control information. 2. The method of claim 1, wherein the time block is a slot, and the 0th symbol in the time block is for automatic gain control, AGC. 3. The method according to claim 1 or 2, in which the second level control information is mapped first in the frequency domain and then in the time domain to the resource occupied by the second level control information. 4. A method for receiving control information, the method comprising: selecting, from a second resource set, a resource occupied by second-layer control information, wherein the initial symbol in the time domain of the second resource set is the (n+k+1)th symbol in the time block, n is 1, k is a positive integer , the first resource set contains a resource used to send first-level control information, and the first-level control information occupies all symbols occupied by the first resource set, in which the first resource set occupies from the nth symbol to the (n+k)th symbol in time block; And receiving first-level control information and second-level control information, in which the resource occupied by the second-level control information is adjacent, in the time domain, to the resource occupied by the first-level control information, and the initial position in the frequency domain of the resource occupied by the second-level control information, is the same as the starting position in the frequency domain of the resource occupied by the first-level control information. 5. The method of claim 4, wherein the time block is a slot, and the 0th symbol in the time block is for automatic gain control, AGC. 6. The method of claim 4 or 5, wherein the second level control information is mapped first in the frequency domain and then in the time domain to the resource occupied by the second level control information. 7. A device for sending control information, the device comprising: a processing module configured to select, from the second resource set, a resource occupied by second-layer control information, wherein the initial symbol in the time domain of the second resource set is the (n+k+1)th symbol in the time block, n is 1 , k is a positive integer, the first resource set contains the resource used to send first-level control information, and the first-level control information occupies all symbols occupied by the first resource set, in which the first resource set occupies from the nth symbol to (n+ k)th symbol in the time block; And a transceiver module configured to send first-level control information and second-level control information, in which a resource occupied by the second-level control information is adjacent, in the time domain, to a resource occupied by the first-level control information, and an initial position in the frequency domain of the resource, occupied by the second level control information is the same as the starting position in the frequency domain of the resource occupied by the first level control information. 8. The device of claim 7, wherein the time block is a slot, and the 0th symbol in the time block is for automatic gain control, AGC. 9. The apparatus of claim 7 or 8, wherein the second level control information is mapped first in the frequency domain and then in the time domain to the resource occupied by the second level control information. 10. A device for receiving control information, the device comprising: a processing module configured to select, from the second resource set, a resource occupied by second-level control information, wherein the initial symbol in the time domain of the second resource set is the (n+k+1)th symbol in the time block, n is 1 , k is a positive integer, the first resource set contains the resource used to send first-level control information, and the first-level control information occupies all symbols occupied by the first resource set, in which the first resource set occupies from the nth symbol to (n+ k)th symbol in the time block; And a transceiver module configured to receive first-level control information and second-level control information, in which a resource occupied by the second-level control information is adjacent, in the time domain, to a resource occupied by the first-level control information, and an initial position in the frequency domain of the resource, occupied by the second level control information is the same as the starting position in the frequency domain of the resource occupied by the first level control information. 11. The apparatus of claim 10, wherein the time block is a slot, and the 0th symbol in the time block is for automatic gain control, AGC. 12. The apparatus of claim 10 or 11, wherein the second level control information is mapped first in the frequency domain and then in the time domain to a resource occupied by the second level control information. 13. A communication device, wherein the device comprises at least one processor, and the at least one processor is coupled to at least one memory; And the at least one processor is configured to execute a computer program or instruction stored in the at least one memory, such that the device executes the method of any one of claims. 1-3. 14. A communication device, wherein the device comprises at least one processor, wherein the at least one processor is coupled to at least one memory; And the at least one processor is configured to execute a computer program or instruction stored in the at least one memory, such that the device executes the method of any one of claims. 4-6. 15. A communication device containing a processor and an interface circuit in which the interface circuit is configured to: receive a code instruction and transmit a code instruction to the processor; And the processor is configured to run a code instruction for executing the method according to any one of claims. 1-3. 16. A communication device containing a processor and an interface circuit in which the interface circuit is configured to: receive a code instruction and transmit a code instruction to the processor; And the processor is configured to run a code instruction for executing the method according to any one of claims. 4-6. 17. A machine-readable storage medium configured to store instructions, and when executing the instructions, the method according to any one of claims is implemented. 1-3. 18. A machine-readable storage medium configured to store instructions, and when executing the instructions, the method according to any one of claims is implemented. 4-6.