CN113473606A - Communication method and device - Google Patents
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Abstract
The embodiment of the application discloses a communication method and a communication device, which are used for a terminal device to acquire control information suitable for the type of terminal device and realize communication between a network device and the type of terminal device. The method comprises the following steps: receiving downlink control information from network equipment, wherein the downlink control information comprises a first Modulation Coding Scheme (MCS) field; when the value of the first MCS field is a first value, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or, when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.
Background
In order to cope with explosive mobile data traffic increase, massive mobile communication device connection, and various new services and application scenarios which are continuously emerging, the fifth generation (5G) mobile communication system is in operation. For example, three major application scenarios are defined in the 5G mobile communication system: enhanced mobile broadband (eMBB) scenarios, high-reliability and low-latency communications (URLLC) scenarios, and massive machine type communications (mtc) scenarios.
Exemplary, an eMBB scenario includes: ultra-high-definition video, Augmented Reality (AR), Virtual Reality (VR), and the like, and these services are mainly characterized by a large transmission data amount and a high transmission rate. URLLC scenarios include: the main characteristics of the applications of the haptic interaction type, such as wireless control in industrial manufacturing or production flow, motion control of unmanned automobiles and unmanned airplanes, remote repair, remote operation and the like, are that ultra-high reliability and low time delay of transmission are required, the amount of transmitted data is small, and the services have burstiness. The mMTC scenario includes: the intelligent power distribution automation, the communication of wearable equipment, smart cities and the like, the main characteristics of these businesses are that networking equipment quantity is huge, and transmission data volume is less, and terminal equipment in the mMTC scene needs to satisfy the demand of low cost and relatively longer standby time.
In the different types of application scenarios, the requirements of the terminal device on the mobile communication system are also different, and particularly how to schedule the control information required by the terminal device in the mtc scenario does not exist.
Disclosure of Invention
The embodiment of the application provides a communication method and device, which are used for a terminal device to acquire control information suitable for the type of terminal device and realize communication between a network device and the type of terminal device.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
in a first aspect, an embodiment of the present application provides a communication method, including: receiving downlink control information from network equipment, wherein the downlink control information comprises a first Modulation Coding Scheme (MCS) field; when the value of the first MCS field is a first value, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or, when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device. In this scheme, the network device can transmit their respective downlink control information for different types of terminal devices. For example, the downlink control information with a smaller scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
In a second aspect, an embodiment of the present application further provides a communication method, including: sending downlink control information to terminal equipment, wherein the downlink control information comprises a first Modulation Coding Scheme (MCS) field; when the downlink control information is used for scheduling data transmission of a first type of terminal equipment, determining the value of the first MCS field as a first value; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first MCS field is not the first value, or determining that the value of the first MCS field is a second value.
In one possible implementation, the value of the first MCS field is a first value, and includes: the values of all bits of the first MCS field are 1. In this embodiment of the present application, indicating, by a first MCS field in downlink control information, that the downlink control information is used for scheduling data transmission for a first type terminal device or a second type terminal device includes: scheduling data transmission for the first type of terminal device is indicated by a special bit state of the first MCS field (e.g., the special bit state may be that the state of all bits of the first MCS field is an all-1 state), which indicates with all bits of the first MCS field that the false alarm probability is low.
In a possible implementation manner, when the downlink control information is used for scheduling data transmission of a first type terminal device, the downlink control information further includes a second MCS field, and the second MCS field is used for indicating an MCS of the data transmission of the first type terminal device. In this embodiment of the present application, the downlink control information may include a first MCS field, and the downlink control information may further include a second MCS field indicating an MCS for data transmission scheduled for the first type terminal device.
In one possible implementation manner, when the value of the first MCS field is a first value, determining that the downlink control information is used for scheduling data transmission of a first type terminal device includes: when the value of the most significant bit of the first MCS field is 1, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or, when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device, including: and when the value of the most significant bit of the first MCS field is 0, determining that the downlink control information is used for scheduling data transmission of a second type terminal device. In the embodiment of the application, when the most significant bit of the first MCS field is 1, the first MCS field indicates that the first type terminal device is scheduled for data transmission, the mode indication mode is simple, and the first MCS field may indicate the MCS for data transmission scheduled for the first type terminal device.
In one possible implementation, when the downlink control information is used to schedule data transmission of a first type of terminal device, at least one bit in the first MCS field is used to indicate an MCS for the data transmission of the first type of terminal device, where the at least one bit does not include a most significant bit of the first MCS field. In the embodiment of the application, the network device may indicate the MCS of the data transmission of the first type terminal device through at least one bit except for the highest bit in the first MCS field, so that the network device may indicate the MCS.
In one possible implementation, the first MCS field includes 5 bits.
In a third aspect, an embodiment of the present application provides a communication method, including: receiving downlink control information from a network device; when the downlink control information is scrambled by a first scrambling sequence, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or, when the downlink control information is scrambled by the second scrambling sequence, determining that the downlink control information is used for scheduling data transmission of the second type terminal device. In the scheme, when analyzing the downlink control information, the terminal device determines whether the downlink control information is used for scheduling data transmission for the terminal device according to the scrambling sequence, so that the terminal device can correctly obtain the downlink control information sent to the terminal device by the network device. The network device is capable of transmitting their respective downlink control information for different types of terminal devices. For example, the downlink control information with a smaller scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
In a fourth aspect, an embodiment of the present application provides a communication method, including: sending downlink control information to the terminal equipment; when the downlink control information is used for scheduling data transmission of the first type terminal equipment, scrambling the downlink control information by using a first scrambling sequence; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, scrambling the downlink control information by using a second scrambling sequence.
In one possible implementation, the initialization parameter used to generate the first scrambling sequence is a non-zero value, and the initialization parameter used to generate the second scrambling sequence is equal to zero. The network device may use a non-zero value as an initialization parameter, generate a first scrambling sequence by a scrambling sequence generator, and then scramble the downlink control information by using the first scrambling sequence to indicate a type of the terminal device scheduled by the downlink control information by using the first scrambling sequence. Or, the network device may generate a second scrambling sequence by the scrambling sequence generator using zero as an initialization parameter, and then scramble the downlink control information using the second scrambling sequence to indicate the type of the terminal device scheduled by the downlink control information through the second scrambling sequence. In the embodiment of the present application, the initialization parameter of the scrambling sequence may be a nonzero value or zero, so that when the terminal device analyzes the downlink control information, it is determined whether the downlink control information is data transmission scheduled by the terminal device according to the scrambling sequence used.
In a fifth aspect, an embodiment of the present application provides a communication method, including: receiving downlink control information from a network device, wherein the downlink control information comprises a first bit; when the value of the first bit is a third value, determining that the downlink control information is used for scheduling data transmission of the first type terminal equipment; or, when the value of the first bit is a fourth value, determining that the downlink control information is used for scheduling data transmission of the second type terminal device. The embodiment of the application indicates that the downlink control information is used for scheduling data transmission for the first type terminal device or the second type terminal device through the first bit in the downlink control information. The indication mode is simple, and the complexity of the realization of the terminal equipment and the network equipment is low. By the method, the network equipment can send the downlink control information with different characteristics for different types of terminal equipment. For example, the downlink control information with a larger scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
In a sixth aspect, an embodiment of the present application provides a communication method, including: sending downlink control information to terminal equipment, wherein the downlink control information comprises a first bit; when the downlink control information is used for scheduling data transmission of the first type terminal equipment, determining the value of the first bit as a third value; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first bit is a fourth value.
In a seventh aspect, an embodiment of the present application provides a communication method, including: receiving configuration information of a control resource set from a network device, wherein the configuration information of the control resource set is used for indicating configuration information of a first resource set and configuration information of a second resource set; monitoring a first control channel on resources of a candidate set of control channels, wherein the resources of the candidate set of control channels include resources in the first set of resources and resources in the second set of resources. In this scheme, a control channel for scheduling data transmission for a terminal device is sent on a first resource set and a second resource set, and the terminal device receives information on the first resource set and the second resource set in two time domain resources, respectively. The first set of resources and the second set of resources are determined from the set of control resources. Illustratively, the terminal device is a first type terminal device, and when the bandwidth capability of the first type terminal device is smaller than the bandwidth of the configured control resource set, the terminal device can also receive the control channel sent by the network device, and the flexibility of the configuration of the control resource set and the search space is not affected. Optionally, the set of control resources is used for receiving control information by a second type of terminal device.
In an eighth aspect, an embodiment of the present application provides a communication method, including: sending configuration information of a control resource set to terminal equipment, wherein the configuration information of the control resource set is used for indicating the configuration information of a first resource set and the configuration information of a second resource set; transmitting a first control channel on resources of a candidate control channel set, wherein the resources of the candidate control channel set comprise resources in the first resource set and resources in the second resource set.
In a possible implementation manner, the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and includes: the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of an s-th frequency domain resource in the first resource set is offset from a frequency domain position of a t-th frequency domain resource in the first control resource set by a first offset, and a frequency domain position of an r-th frequency domain resource in the second resource set is offset from a frequency domain position of a p-th frequency domain resource in the first resource set by a second offset, wherein s, t, r, and p are integers greater than 0. In this scheme, an offset exists between the resources in the first resource set and the resources in the first control resource set, so that the resources in the first resource set can be determined according to the resources in the first control resource set. For example, the frequency domain position of the s-th frequency domain resource in the first set of resources is offset from the frequency domain position of the t-th frequency domain resource in the first set of control resources by a first offset amount. The first offset is a predetermined value or a value notified to the terminal device by the network device. The s-th frequency domain resource in the first set of resources may be any one of the first set of resources. And offset exists between the resources in the second resource set and the resources in the first resource set, so that the resources in the second resource set can be determined according to the resources in the first resource set. For example, the frequency domain position of the r-th frequency domain resource in the second set of resources is offset from the frequency domain position of the p-th frequency domain resource in the first set of resources by a second offset amount. The second offset is a predetermined value or a value notified to the terminal device by the network device. The p-th frequency domain resource in the first set of resources may be any one of the first set of resources. The r-th frequency domain resource in the second set of resources may be any one of the resources in the second set of resources.
In a possible implementation manner, the first offset is an integer multiple of N/M, where N is the number of frequency domain resource units included in the first control resource set, M is a positive integer, and/is a division symbol. The frequency domain resource unit is a resource unit of the control resource set in the frequency domain, for example, the frequency domain resource unit may be one of the following information: control channel unit, resource block, resource unit, resource block group, resource unit group, subcarrier interval. N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein. The value of M may be 4 or 6, and may also take other values, which are not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the first set of resources is an integer multiple of N/M, e.g., 1. When N/M cannot divide by integer, the value of N/M can be up-valued or down-rounded. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the first resource set can be easily realized.
In a possible implementation manner, the second offset is an integer multiple of N/E, where N is the number of frequency domain resource units included in the first control resource set, E is a positive integer, and/is a division symbol. Specifically, E may be a positive integer, and the value of E may be various, for example, the value of E may be 4 or 6, and E may also take other values, which is not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the second set of resources is an integer multiple of N/E, e.g., 1. When the N/E cannot be divided by the integer, the N/E can be subjected to up value or down integer. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the second resource set can be easily realized.
In a possible implementation manner, the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and includes: the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of a vth frequency domain resource in the first resource set is shifted from a frequency domain position of a w frequency domain resource in the first control resource set by a third offset amount, and a frequency domain position of an xth frequency domain resource in the second resource set is shifted from a frequency domain position of a yth frequency domain resource in the first control resource set by a fourth offset amount, wherein v, w, x, and y are integers greater than 0. And determining the resources in the first resource set according to the resources in the first control resource set. For example, the frequency domain position of the vth frequency domain resource in the first resource set is offset from the frequency domain position of the w frequency domain resource in the first control resource set by the third offset amount. The third offset is a predetermined value or a value notified to the terminal device by the network device. The vth frequency domain resource in the first resource set may be any one resource in the first resource set. And offset exists between the resources in the second resource set and the resources in the first control resource set, so that the resources in the second resource set can be determined according to the resources in the first control resource set. For example, the frequency domain position of the xth frequency domain resource in the second set of resources is offset from the frequency domain position of the yth frequency domain resource in the first set of control resources by a fourth offset amount. The fourth offset is a predetermined value or a value notified to the terminal device by the network device. The xth frequency-domain resource in the second set of resources may be any one of the resources in the second set of resources.
In a possible implementation manner, the third offset is an integer multiple of N/F, where N is the number of frequency domain resource units included in the first control resource set, F is a positive integer, and/is a division symbol. Wherein N is the number of frequency domain resource units included in the first control resource set. For example, when the frequency domain resource unit is a resource block, N takes a value of 48 or 96. N may also take other values and is not limited herein. Specifically, F may be a positive integer, and F may take various values, for example, F may take 4 or 6, and F may also take other values, which is not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the first set of resources is an integer multiple of N/F, e.g., 1. And when the N/F cannot be divided by the integer, the N/F can be subjected to up value or down integer. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the first resource set can be easily realized.
In a possible implementation manner, the fourth offset is an integer multiple of N/G, where N is the number of frequency domain resource units included in the first control resource set, G is a positive integer, and/is a division symbol. Wherein N is the number of frequency domain resource units included in the first control resource set. For example, when the frequency domain resource unit is a resource block, N takes a value of 48 or 96. N may also take other values and is not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the second set of resources is an integer multiple of N/G, e.g., 1. And when the N/G cannot be divided by the integer, the N/G can be subjected to up value taking or down integer taking. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the second resource set can be easily realized.
In a possible implementation manner, the first resource set includes N/H frequency domain resource units in a frequency domain, where N is the number of frequency domain resource units included in the first control resource set, H is a positive integer, and/or is a division symbol. Where N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein. Specifically, H may be a positive integer, and H may take various values, for example, H may take 4 or 6, and H may also take other values, which is not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the first set of resources is an integer multiple of N/H, e.g., 1. And when the N/H cannot be divided by the integer, the N/H can be subjected to up value or down integer. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the first resource set can be easily realized.
In a possible implementation manner, the second resource set includes N/U frequency domain resource units in a frequency domain, where N is the number of frequency domain resource units included in the first control resource set, U is a positive integer, and/or is a division symbol. Where N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein. Specifically, U may be a positive integer, and U may take various values, for example, U may take a value of 4 or 6, and U may also take other values, which is not limited herein.
In one possible implementation, the bandwidth of the frequency domain of the second set of resources is an integer multiple of N/U, e.g., 1. And when the N/U cannot be divided by the integer, the N/U can be subjected to up value taking or down integer taking. The integer multiple may be the same as or different from the integer multiple in the preceding paragraph. Through the method, the configuration of the second resource set can be easily realized.
In one possible implementation, the set of control resources may be CORESET0 and the Search Space may be Search Space 0.
In one possible implementation, the method further includes: receiving configuration information of a search space from the network device, the configuration information of the search space indicating a time domain location of the first set of resources and a time domain location of the second set of resources.
In one possible implementation, the method further includes: and sending configuration information of a search space to the terminal equipment, wherein the configuration information of the search space is used for indicating the time domain position of the first resource set and the time domain position of the second resource set. In this embodiment of the application, after the network device configures the first resource set and the second resource set for the terminal device, the network device may indicate a time domain position of the first resource set and a time domain position of the second resource set through configuration information of a search space, so that after the terminal device receives the configuration information of the search space, the terminal device may obtain the time domain position of the first resource set and the time domain position of the second resource set through the configuration information of the search space, and thus the terminal device may monitor the first control channel by using the first resource set and the second resource set to determine the first control channel sent by the network device.
In a possible implementation manner, the configuration information of the search space is used to indicate a time domain position of the first set of resources and a time domain position of the second set of resources, and includes: the configuration information of the search space indicates a time domain position of a first search space; a time domain position of a Ts-th time domain resource in the first resource set is shifted from a time domain position of a Tt-th time domain resource in the first search space by a fifth offset amount, a time domain position of a Tr-th time domain resource in the second resource set is shifted from a time domain position of a Te-th time domain resource in the first resource set by a sixth offset amount, and the Ts, the Tt, the Tr, and the Te are integers greater than 0; or, a time domain position of a Tv-th time domain resource in the first resource set is shifted from a time domain position of a Tw-th time domain resource in the first search space by a seventh offset amount, a time domain position of a Tx-th time domain resource in the second resource set is shifted from a time domain position of a Ty-th time domain resource in the first search space by an eighth offset amount, and Tv, Tw, Tx, and Ty are integers greater than 0. And determining the time domain resources in the first resource set according to the time domain resources in the first search space. And offset exists between the time domain resources in the second resource set and the time domain resources in the first resource set, so that the time domain resources in the second resource set can be determined according to the time domain resources in the first resource set.
In a possible implementation manner, the number of time domain resource units included in the first resource set is equal to the number of time domain resource units included in the first control resource set. The number of the time domain resource units included in the first resource set is equal to the number of the time domain resource units included in the first control resource set, so that the network device and the terminal device can conveniently determine the number of the time domain resource units included in the first resource set, and the processing complexity of the network device and the terminal device is simplified.
In a possible implementation manner, the number of time domain resource units included in the second resource set is equal to the number of time domain resource units included in the first control resource set. The number of the time domain resource units included in the second resource set is equal to the number of the time domain resource units included in the first control resource set, so that the network device and the terminal device can conveniently determine the number of the time domain resource units included in the second resource set, and the processing complexity of the network device and the terminal device is simplified.
In a ninth aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to receive downlink control information from a network device, where the downlink control information includes a first modulation and coding scheme MCS field;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type of terminal device when the value of the first MCS field is a first value; or, when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device.
In a possible design, specific content included in the downlink control information may be referred to the specific description of the downlink control information in the first aspect, and is not specifically limited herein.
In a tenth aspect, an apparatus is provided, which may be a network device, an apparatus in a network device, or an apparatus capable of being used with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to send downlink control information to a terminal device, where the downlink control information includes a first modulation and coding scheme MCS field;
a processing module, configured to determine that a value of the first MCS field is a first value when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first MCS field is not the first value, or determining that the value of the first MCS field is a second value.
In a possible design, specific content included in the downlink control information may be referred to the specific description for the downlink control information in the second aspect, and is not specifically limited herein.
In an eleventh aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the third aspect, where the module may be implemented by hardware, software, or a combination of hardware and software. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to receive downlink control information from a network device;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type of terminal device when the downlink control information is scrambled by a first scrambling sequence; or, when the downlink control information is scrambled by the second scrambling sequence, determining that the downlink control information is used for scheduling data transmission of the second type terminal device.
In one possible design, the initialization parameter used to generate the first scrambling sequence is a non-zero value, and the initialization parameter used to generate the second scrambling sequence is equal to zero.
In a twelfth aspect, an apparatus is provided, where the apparatus may be a network device, may also be an apparatus in a network device, or may be an apparatus capable of being used in cooperation with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the fourth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
the receiving and sending module is used for sending downlink control information to the terminal equipment;
a processing module, configured to scramble the downlink control information using a first scrambling sequence when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, scrambling the downlink control information by using a second scrambling sequence.
In a thirteenth aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the fifth aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to receive downlink control information from a network device, where the downlink control information includes a first bit;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type terminal device when the value of the first bit is a third value; or, when the value of the first bit is a fourth value, determining that the downlink control information is used for scheduling data transmission of the second type terminal device.
In a fourteenth aspect, an apparatus is provided, where the apparatus may be a network device, an apparatus in a network device, or an apparatus capable of being used in cooperation with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the sixth aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to send downlink control information to a terminal device, where the downlink control information includes a first bit;
a processing module, configured to determine that a value of the first bit is a third value when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first bit is a fourth value.
In a fifteenth aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the seventh aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to receive configuration information of a control resource set from a network device, where the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set;
a processing module, configured to monitor a first control channel on resources of a candidate control channel set by using a transceiver module, where the resources of the candidate control channel set include resources in the first resource set and resources in the second resource set.
In a sixteenth aspect, an apparatus is provided, where the apparatus may be a network device, an apparatus in a network device, or an apparatus capable of being used with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the eighth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,
a transceiver module, configured to send configuration information of a control resource set to a terminal device, where the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set;
a processing module, configured to send a first control channel on a resource of a candidate control channel set by using a transceiver module, where the resource of the candidate control channel set includes a resource in the first resource set and a resource in the second resource set.
In a seventeenth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the first aspect, the third aspect, the fifth aspect, or the seventh aspect. Optionally, the apparatus may further comprise a memory for storing instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect, the third aspect, the fifth aspect, or the seventh aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:
a memory for storing program instructions;
a processor, configured to perform the steps in the foregoing first aspect, third aspect, fifth aspect, or seventh aspect by using a communication interface, which is not limited herein in detail.
In an eighteenth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect. Optionally, the apparatus may further comprise a memory for storing instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be terminal devices. In one possible arrangement, the apparatus comprises:
a memory for storing program instructions;
a processor, configured to perform the steps in the foregoing second aspect, fourth aspect, sixth aspect, or eighth aspect by using the communication interface, which is not limited herein in detail.
In a nineteenth aspect, this embodiment also provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method according to any one of the first to eighth aspects.
In a twentieth aspect, the present application further provides a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the method according to any one of the first to eighth aspects.
In a twenty-first aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any one of the first to eighth aspects. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In a twenty-second aspect, embodiments of the present application provide a system, which includes the apparatus of the ninth aspect, and the apparatus of the tenth aspect; or the like, or, alternatively,
the system comprises the apparatus of the eleventh aspect, and the apparatus of the twelfth aspect; or the like, or, alternatively,
the system comprises the apparatus of the thirteenth aspect, and the apparatus of the fourteenth aspect; or the like, or, alternatively,
the system comprises the apparatus of the fifteenth aspect, and the apparatus of the sixteenth aspect; or the like, or, alternatively,
the system comprises the device of the seventeenth aspect and the device of the eighteenth aspect.
Drawings
Fig. 1 is an interaction flow diagram of a communication method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a frame structure of downlink control information according to an embodiment of the present application;
fig. 3 is an interaction flow diagram of a communication method according to an embodiment of the present application;
fig. 4 is an interaction flow diagram of a communication method according to an embodiment of the present application;
fig. 5 is a schematic diagram of non-interleaved mapping between CCEs and REGs in control information with aggregation level 2 according to an embodiment of the present application;
fig. 6 is a schematic diagram of interleaving and mapping CCEs and REGs in control information with an aggregation level of 2 according to an embodiment of the present application;
fig. 7a is a schematic diagram of a mapping relationship between aggregation levels and CCEs according to an embodiment of the present application;
fig. 7b is a schematic diagram of a mapping relationship between aggregation levels and CCEs provided in the embodiment of the present application;
fig. 8 is an interaction flow diagram of a communication method according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a communication method and device, which are used for a terminal device to acquire control information suitable for the type of terminal device and realize communication between a network device and the type of terminal device.
Embodiments of the present application are described below with reference to the accompanying drawings.
The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as: a Long Term Evolution (LTE) system, a 5G mobile communication system, a wireless fidelity (WiFi) system, a future communication system, or a system in which multiple communication systems are integrated, and the like, which are not limited in the embodiment of the present application. Among them, 5G may also be referred to as New Radio (NR).
The technical scheme provided by the embodiment of the application can be applied to various communication scenes, for example, one or more of the following communication scenes: eMBB, URLLC, mtc, device-to-device (D2D) communication, vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, and internet of things (IoT), among others.
The wireless communication system comprises communication devices, and the communication devices can perform wireless communication by using air interface resources. The communication device may include a network device and a terminal device, and the network device may also be referred to as a network side device. The air interface resources may include at least one of time domain resources, frequency domain resources, code resources, and spatial resources. In the embodiments of the present application, at least one may also be described as one or more, and a plurality may be two, three, four or more, and the embodiments of the present application are not limited. For example, a wireless communication system includes two communication devices, a first communication device and a second communication device, wherein the first communication device may be a network device and the second communication device may be a terminal device.
In the embodiment of the present application, "/" may indicate a relationship that the associated objects are an or, for example, a/B may indicate a or B, and in the formula calculation, "/" may indicate a division symbol, N/M indicates N divided by M, and N and M each indicate a numerical value; "and/or" may be used to describe that there are three relationships for the associated object, e.g., A and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. For convenience of describing the technical solutions of the embodiments of the present application, the words "first", "second", "a", "B", and the like may be used in the embodiments of the present application to distinguish technical features having the same or similar functions. The terms "first", "second", "a", "B", and the like do not necessarily limit the number and execution order, and the terms "first", "second", "a", "B", and the like do not necessarily differ. In the embodiments of the present application, the words "exemplary" or "such as" are used to indicate examples, illustrations or illustrations, and any embodiment or design described as "exemplary" or "e.g.," should not be construed as preferred or advantageous over other embodiments or designs. The use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.
The terminal device related to the embodiment of the present application may also be referred to as a terminal, and may be a device with a wireless transceiving function, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or may be deployed on the surface of the water (e.g., a ship, etc.); or may be deployed in the air (e.g., an airplane, balloon, or satellite, etc.). The terminal device may be a User Equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device having wireless communication functionality. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. Or the terminal device may be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), or a wireless terminal in smart home (smart home), and so on. In the embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device, or the apparatus may be used in cooperation with the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the embodiment of the present application, a device for implementing a function of a terminal device is taken as an example of a terminal device, so as to specifically describe a technical solution provided in the embodiment of the present application.
The terminal device in the mtc scenario may be a reduced capability (redcapbility) terminal device. Among them, the REDCAP terminal device may also be referred to as a light (light) terminal device. For example, the redtap terminal device in the NR system has lower capability than a conventional terminal device, for example, the redtap terminal device has one or more of the following features compared with the conventional terminal device: support narrower bandwidths, fewer antennas configured, less maximum transmit power supported, support lower duplex capabilities (e.g., a legacy terminal device supports full duplex frequency division duplex and a REDCAP terminal device supports half duplex frequency division duplex), and weaker data processing capabilities (e.g., a REDCAP terminal device may process less data than a legacy terminal device at the same time or a REDCAP terminal device may process more time than a legacy terminal device at the same time), so the REDCAP terminal device and the legacy terminal device may need different system information, a proprietary access network, and/or control channels of different capabilities, etc. The legacy terminal device may be a non-REDCAP terminal device, and the non-REDCAP terminal device mainly supports an eMBB service and/or a URLLC service. Compared with the REDCAP terminal device, the conventional terminal device can be regarded as a high-capability terminal device or a terminal device with unlimited capability. Alternatively, legacy terminal devices may be replaced with future-introduced terminal devices that are high-capability relative to the REDCAP terminal devices.
The network device related to the embodiment of the present application includes a Base Station (BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal device. The base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, and the like. For example, the base station related to the embodiment of the present application may be a base station in a 5G mobile communication system or a base station in LTE, where the base station in the 5G mobile communication system may also be referred to as a Transmission Reception Point (TRP) or a gNB. In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus capable of supporting the network device to implement the function, for example, a system on chip, and the apparatus may be installed in the network device, or the apparatus may be used in cooperation with the network device. In the embodiment of the present application, taking a device for implementing a function of a network device as an example, a technical solution provided in the embodiment of the present application is specifically described.
The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication devices. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, or wireless communication between a terminal device and a terminal device. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission", or "transmission". The technical scheme can be used for wireless communication between the scheduling entity and the subordinate entity, wherein the scheduling entity can allocate resources for the subordinate entity. Those skilled in the art can use the technical solution provided in the embodiments of the present application to perform wireless communication between other scheduling entities and subordinate entities, for example, wireless communication between a macro base station and a micro base station, for example, wireless communication between a first type terminal device and a second type terminal device. Wherein the first type terminal device and the second type terminal device may represent two terminal devices of different types. For example, the first type terminal device may be a terminal device for an Industrial Wireless Sensor Network (IWSN), and the second type terminal device may be a terminal device for Video Surveillance (Video Surveillance). Alternatively, the first type of terminal device may be a type 1 reduced capability terminal device, and the second type of terminal device may be a type 2 reduced capability terminal device and a non-reduced capability terminal device. For example, the first type terminal device may be a terminal device for an industrial wireless sensor network, and the second type terminal device may be a terminal device for video surveillance and an enhanced mobile broadband (eMBB) terminal device.
The embodiment of the application provides a communication method, which is applicable to communication scenes between network equipment and various types of terminal equipment, and can provide independent control information for different types of terminal equipment, for example, independent control information can be provided for REDCAP terminal equipment, so that communication requirements of various types of terminal equipment are met, for example, REDCAP terminal equipment and traditional terminal equipment need to access a network through different system information, so that the required system information needs to be received according to different control information. Alternatively, the REDCAP terminal device and the legacy terminal device need different bandwidths for data reception, so that different types of terminal devices need to be provided with different control information. Optionally, when the method is used for the URLLC terminal device, independent control information can be provided for the URLLC terminal device. Optionally, when the method is used for an eMBB terminal device, independent control information may be provided for the eMBB terminal device.
Please refer to fig. 1, which is a schematic view of an interaction flow between a network device and a terminal device according to an embodiment of the present application, in the interaction flow, steps 101 to 103 are described from the network device side, and steps 111 to 113 are described from the terminal device side. The interaction flow shown in fig. 1 mainly includes the following steps:
101. the network device sends Downlink Control Information (DCI) to the terminal device, where the DCI includes a first Modulation and Coding Scheme (MCS) field.
In the embodiment of the present application, a field in DCI may also be referred to as a field or an information field in DCI. For example, the first MCS field in the DCI may also be referred to as a first MCS field or a first MCS information field.
The network device may generate downlink control information, and the downlink control information may be carried by a Physical Downlink Control Channel (PDCCH). The downlink control information is used for scheduling a Physical Downlink Shared Channel (PDSCH), for example, the downlink control information indicates parameters such as time domain resources, frequency domain resources, modulation and coding schemes, which are required for receiving the PDSCH, and after the terminal device receives the downlink control information from the network device, the terminal device receives the PDSCH according to the parameters indicated by the downlink control information.
The PDSCH is used for downlink data transmission. The downlink control information scheduling PDSCH has the same meaning as downlink control information scheduling downlink data transmission, and scheduling downlink data transmission may be referred to as scheduling data transmission for short. For example, the PDSCH may carry a System Information Block (SIB). The SIB is used to carry common information in a cell where the terminal device is located, where the common information includes system information and other common information required for the terminal device to access the network device. For example, according to the system information, the terminal device can access the network device in the cell and communicate with the network device. Alternatively, the system information in a cell may be sent through multiple SIBs, with different SIBs carrying different system information. For example, SIB1 carries system information that needs to be learned before the terminal device accesses the network, and other system information blocks (e.g., SIB2 to SIB9) carry system information that does not need to be learned before the terminal device accesses the network. For example, the PDSCH may carry a paging message, a random access response, or the like, and the embodiments of the present application are not limited thereto.
In this embodiment, in order to be able to indicate that the downlink control information is used for scheduling data transmission for which type of terminal device, the network device may include a first MCS field in the downlink control information, and indicate which type of terminal device to schedule data transmission through the first MCS field. Specifically, the first MCS field included in the downlink control information may be a newly added field in the downlink control information, or may also be a reserved field in the downlink control information, or an original field in the downlink control information, which is not limited herein.
In the embodiment of the application, the downlink control information may be used to schedule data transmission of different types of terminal devices, and for convenience of description, the downlink control information may also be referred to as downlink control information for short. The first MCS field included in the downlink control information may indicate a type of a terminal device scheduled by the downlink control information, and the downlink control information may be used for scheduling system information, or for scheduling a random access response message, or for scheduling a paging message, or for scheduling other common messages, and the common messages are used for scheduling all terminal devices or a plurality of terminal devices in a cell, which is not limited herein. In this embodiment of the present application, when the first MCS field is used to indicate that the downlink control information schedules different types of terminal devices, the values of the first MCS field are different. The network device may determine the value of the first MCS field by either step 102 or step 103 as follows. In this embodiment of the application, the network device may determine to execute the subsequent step 102 or step 103 according to different types of terminal devices scheduled by the downlink control information, and specifically may determine the specific step to be executed according to the type of the terminal device that needs to be scheduled by the downlink control information in an actual application scenario.
102. When the downlink control information is used for scheduling data transmission of the first type terminal equipment, the network equipment determines that the value of the first MCS field is a first value; or the like, or, alternatively,
103. when the downlink control information is used for scheduling data transmission of the second type terminal device, the network device determines that the value of the first MCS field is not the first value or determines that the value of the first MCS field is the second value.
When the network device needs to send a plurality of downlink control information of the above types to the terminal device in a Transmission Time Interval (TTI), for example, in a subframe or a timeslot, the network device may perform the foregoing steps 101 to 103 for each control information of the above types, respectively.
In a possible implementation manner, the downlink control information is used to schedule the PDSCH, for example, the downlink control information indicates transmission parameters of the PDSCH, such as time domain resources, frequency domain resources, and modulation and coding schemes, and after the terminal device receives the downlink control information from the network device, the terminal device receives the PDSCH according to the transmission parameters indicated by the downlink control information. The downlink control information may be used for scheduling data transmission for at least two different types of terminal devices, for example, the downlink control information may be used for scheduling data transmission for a first type of terminal device, or may be used for scheduling data transmission for a second type of terminal device. The first type terminal device and the second type terminal device respectively represent different types of terminal devices. The downlink control information is used for scheduling data transmission of two different types of terminal devices, which is only one possible example, and the downlink control information may also be used for scheduling data transmission of three different types of terminal devices, or scheduling data transmission of more types of terminal devices, which is not limited herein. In the embodiment of the present application, for simplicity of description, when the downlink control information is used for scheduling data transmission of one type of terminal device, it may also be described as: the downlink control information is used for scheduling a type of terminal device.
In the embodiment of the present application, the first type terminal device and the second type terminal device have multiple implementations, which are illustrated below. For example, the first type of terminal device may be a terminal device for internet of things, or a REDCAP terminal device. The second type of terminal device may be an enhanced mobile broadband (eMBB) terminal device or a low latency high reliability (URLLC) terminal device. Or the first type of terminal device is type 1 of reduced capability terminal device and the second type of terminal device is type 2 of reduced capability terminal device. For example, the first type of terminal device is a terminal device for an Industrial Wireless Sensor Network (IWSN), and the second type of terminal device is a terminal device for Video Surveillance (Video Surveillance). Or the first type terminal device is type 1 of the reduced capability terminal device, the second type terminal device is type 2 of the reduced capability terminal device and the non-reduced capability terminal device. For example, the first type of terminal device is a terminal device for an industrial wireless sensor network, and the second type of terminal device is a terminal for video surveillance and an enhanced mobile broadband (eMBB) terminal device.
Optionally, the characteristic information of different types of terminal devices is different. For one type of terminal device, the characteristic information of the terminal device may be embodied as parameter values of one or more of the following parameters: maximum bandwidth (MAX BW), minimum bandwidth, application scenario, peak rate, maximum modulation order, duplexing capability, number of antennas, processing time (delay), reliability requirements (e.g., required block error rate or bit error rate), whether Supplemental Uplink (SUL) is supported, whether Carrier Aggregation (CA) is supported, and CA capability. The values of one or more parameters differ for different types of terminal equipment. The type of the terminal device may be expressed as characteristic information of the terminal device.
Wherein, the maximum modulation order may refer to: the order corresponding to the maximum quadrature amplitude modulation (MAX QAM), for example, the maximum modulation order may be 16 Quadrature Amplitude Modulation (QAM), 64QAM, 256QAM, or the like. The application scenarios may include one or more of the following scenarios: industrial Wireless Sensor Network (IWSN), camera (camera) scenes, wearable (wearable) scenes, video surveillance scenes, and the like. The application scenario may not be limited, and the feature information may be unlimited (not limited) in this case. CA capability may refer to the number of carriers that the terminal device can support at maximum when the terminal device supports CA. Duplex capability may refer to: when the modulation mode of the communication system is Frequency Division Duplex (FDD), whether the terminal device supports the capability of simultaneously receiving and transmitting signals mainly includes two capabilities of half-duplex frequency division duplex (half-duplex FDD) and full-duplex frequency division duplex (full-duplex FDD). The half-duplex FDD indicates that the terminal device does not support simultaneous signal transmission and reception, that is, the terminal device supports time-division signal reception and transmission, and the full-duplex FDD indicates that the terminal device supports simultaneous signal transmission and reception.
For example, table 1 below shows the types of terminal devices and corresponding feature information, and as shown in table 1, the feature information that the terminal device of type 1 has includes: MAX BW being 5 megahertz (MHz) or 10MHz, MAX QAM being 16, applied to an IWSN scenario, the characteristic information that the terminal device of type 3 has includes: the method is applied to characteristics such as a camera scene, wherein MAX BW is 20MHz, and MAX QAM is 16.
| Type (B) | Maximum bandwidth | Maximum modulation | Application scenarios | |
| 1 | MAX BW＝5MHz | MAX QAM＝16 | |
|
| 2 | MAX BW＝10MHz | MAX QAM＝16 | |
|
| 3 | MAX BW＝20MHz | MAX QAM＝16 | |
|
| 4 | MAX BW＝20MHz | MAX QAM＝64 | wearable |
TABLE 1
In the embodiment of the present application, when the first MCS field is used for indicating data transmission of different types of terminal devices scheduled by downlink control information, the values of the first MCS field are different. The value of the first MCS field may be a first value, for example, the first value may be a preconfigured value, or the value of the first MCS field may not be the first value, for example, the value of the first MCS field may be a value other than the first value, for example, the value other than the first value may be a second value.
For example, in the embodiment of the present application, a correspondence between the type of the terminal device scheduled by the downlink control information and the value of the first MCS field in the downlink control information may be preconfigured. That is, the correspondence relationship is known in advance by the network device and the terminal device. Or, the network device may indicate the corresponding relationship to the terminal device through signaling before sending the downlink control information. That is, the network device knows the correspondence before the network device determines the downlink control information, and the terminal device knows the correspondence before the terminal device interprets the downlink control information. Then, when the network device determines the downlink control information, since the network device knows the type of the terminal device to be scheduled, the network device may determine the value of the first MCS field according to the type of the terminal device to be scheduled.
Through the first MCS field in the downlink control information, the terminal equipment can know the type of the received downlink control information, so that the terminal equipment can perform correct operation. For example, for a first type terminal device, when it receives a downlink control information, if it is determined that the downlink control information is used for scheduling the first type terminal device according to the first MCS field in the downlink control information, the first type terminal device may correctly decode the downlink control information and receive the PDSCH using the downlink control information; if the first type terminal device determines that the downlink control information is used for scheduling the second type terminal device according to the first MCS field in the downlink control information, the first type terminal device may discard the downlink control information, thereby preventing the first type terminal device from receiving the PDSCH erroneously.
In the embodiment of the present application, the network device is configured to indicate the type of the terminal device scheduled by the downlink control information through different values carried in the first MCS field in the downlink control information. There are various implementation manners for the correspondence between the type of the terminal device scheduled by the downlink control information and the value of the first MCS field, for example, when the downlink control information is used for scheduling data transmission of the first type of terminal device, the value of the first MCS field is determined to be a first value; or, when the downlink control information is used for scheduling data transmission of the second type terminal device, determining that the value of the first MCS field is not the first value, or determining that the value of the first MCS field is the second value.
Wherein the first value may be a value determined according to a bit state of the first MCS field, the second value may be a value determined according to a bit state of the first MCS field, and the second value is not equal to the first value.
In some embodiments of the present application, the value of the first MCS field is a first value comprising: all bits of the first MCS field have a value of 1. If the first value is the value indicated by the first MCS field when all bits of the first MCS field have values of 1, for example, if the first MCS field has 5 bits, the bit status of the first MCS field corresponding to the first value is 11111. The second value may be any one of 5 bit states other than the first value, for example, the second value is 00000 to 00100. Or the second value is 00000 to 01001, and the second value is any one of 10 bit states. Or a second value of 00000 to 01110 for any of the 14 bit states. In the embodiment of the present application, the network device determines that the values of all bits of the first MCS field are 1 as the first value, which may simplify a manner of identifying the first MCS field, and facilitate the network device to indicate the type of the terminal device scheduled by the downlink control information to the terminal device.
In other embodiments of the present application, the value of the first MCS field being the first value includes: the values of X bits in the first MCS field are all 1, and the value of X is less than or equal to the number of bits included in the first MCS field.
The bit positions included in the first MCS field by the X bits may be predefined, or may be notified to the terminal device by the network device through Radio Resource Control (RRC) signaling, a system message, a Media Access Control (MAC) Control Element (CE), DCI, and the like. For example, the first MCS field includes 5 bits, and the value of X may be equal to 4, that is, the first value is that the values of the 4 bits in the first MCS field are all 1, and the 4 bits are the upper 4 bits in the first MCS field, or the value of X may be equal to 3, that is, the values of the 3 bits in the first MCS field are all 1, and the 3 bits are the upper 3 bits in the first MCS field. The value of X is not limited herein.
In some embodiments of the present application, when the downlink control information is used for scheduling data transmission for a second type terminal device, e.g. when the downlink control information is used for scheduling a PDSCH for a second type terminal device, the value of the first MCS field indicates the MCS for the PDSCH. In the embodiment of the present application, the MCS of the PDSCH may be used to indicate the modulation coding scheme and the corresponding coding rate of the PDSCH. For example, the following table 2 shows modulation and coding schemes and corresponding coding rates of the PDSCH corresponding to different values of the MCS field.
TABLE 2
Where R in table 2 represents the target coding rate, and 30, 40, 50, 64, etc. represent the result of multiplying the target coding rate R by 1024, for example, the result of dividing 30 by 1024 is the target coding rate R.
In some embodiments of the present application, as shown in fig. 2, a frame structure diagram of downlink control information provided in the embodiments of the present application is shown. When the downlink control information is used for scheduling data transmission of the first type terminal equipment, the downlink control information further includes a second MCS field, and the second MCS field is used for indicating the MCS of the data transmission of the first type terminal equipment.
For example, the downlink control information may also indicate an MCS used by the terminal device for data transmission, and if the downlink control information is used for scheduling data transmission of the first type terminal device, the downlink control information also needs to indicate the MCS for data transmission of the first type terminal device. Since the first MCS field included in the downlink control information is used to indicate the type of the terminal device scheduled by the downlink control information, and the downlink control information is to indicate the MCS for data transmission, the downlink control information may further include a second MCS field in addition to the first MCS field, and the second MCS field is used to indicate the MCS for data transmission of the first type terminal device. In the embodiment of the application, the network device may indicate the MCS for data transmission of the first type terminal device through the second MCS field, so that the terminal device may obtain the MCS configured by the network device by analyzing the second MCS field carried in the downlink control information.
For example, when the downlink control information is used to schedule data transmission for the first type terminal device, the downlink control information further includes a second MCS field. The second MCS field comprises 4 bits or the second MCS field comprises 2 bits, and there is no limitation on the number of bits occupied by the second MCS field.
In some embodiments of the present application, the step 102 of determining the value of the first MCS field to be a first value when the downlink control information is used for scheduling data transmission for the first type of terminal device comprises: when the downlink control information is used for scheduling data transmission of the first type terminal equipment, determining the value of the most significant bit of the first MCS field to be 1; or the like, or, alternatively,
step 103, when the downlink control information is used for scheduling data transmission of the second type terminal device, determining that the value of the first MCS field is not the first value or determining that the value of the first MCS field is the second value, including: and when the downlink control information is used for scheduling data transmission of the second type terminal equipment, determining the value of the most significant bit of the first MCS field to be 0.
Wherein the first MCS field has a plurality of bits. When the value of the most significant bit of the first MCS field is 1, the value of the first MCS field is determined to be a first value. And when the value of the highest bit of the first MCS field is 0, determining that the value of the first MCS field is a second value. The most significant bit of the first MCS field may be the bit of the first position of the first MCS field from the left.
In some embodiments of the present application, the first MCS field comprises 5 bits, e.g. downlink control information for scheduling data transmissions for the first type of terminal device, the most significant bit of the 5 bits having a value of 1. Or, the downlink control information is used for scheduling data transmission for the second type terminal device, and the value of the most significant bit of the 5 bits is 0. The number of bits included in the first MCS field is one possible implementation here, and the number of bits included in the first MCS field is not limited, depending on the application scenario.
Further, in some embodiments of the present application, when the downlink control information is used to schedule data transmission for the first type of terminal device, at least one bit of the first MCS field is used to indicate an MCS for the data transmission for the first type of terminal device, wherein the highest order bit of the first MCS field is not included in the at least one bit.
If the downlink control information is used to schedule data transmission of the first type terminal device, the downlink control information further needs to indicate an MCS for data transmission of the first type terminal device. For example, at least one bit in the first MCS field is used to indicate the MCS for the data transmission of the first type terminal device, and the highest order bit of the first MCS field is not included in the at least one bit. For example, the first MCS field may indicate the MCS for the data transmission of the first type terminal device using bits other than the most significant bit, e.g., the first MCS field may indicate the MCS for the data transmission of the first type terminal device using all bits other than the most significant bit. In the embodiment of the application, the network device may indicate the MCS of the data transmission of the first type terminal device through at least one bit except for the highest bit in the first MCS field, so that the network device may indicate the MCS.
For example, the first MCS field includes 5 bits. The downlink control information is used for scheduling data transmission for the first type terminal equipment, the bit state of the highest bit of the first MCS field is 1, and the bit state of 4 bits except the highest bit in the first MCS field is used for indicating a Modulation Coding Scheme (MCS). Or, the bit state of 2 bits of the 4 bits except the most significant bit in the first MCS field is used for indicating the modulation and coding scheme MCS.
Step 101 to step 103 describe the communication method provided by the embodiment of the present application from the network device side, and then describe the communication method provided by the embodiment of the present application from the terminal device side, which mainly includes the following steps:
111. the terminal equipment receives downlink control information from the network equipment, wherein the downlink control information comprises a first MCS field.
For the introduction of the downlink control information, reference may be made to the description in step 101, and details are not described here. The terminal device performing step 111 may be a first type terminal device, or may be a second type terminal device, and is not limited herein.
112. When the value of the first MCS field is a first value, the terminal equipment determines that the downlink control information is used for scheduling data transmission of the first type terminal equipment; or the like, or, alternatively,
113. when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, the terminal device determines that the downlink control information is used for scheduling data transmission of the second type terminal device.
In this embodiment, if the first type terminal device receives downlink control information and the first type terminal device determines that the value of the first MCS field is a first value from the downlink control information, the first type terminal device receives the PDSCH using the downlink control information, and if the first type terminal device determines that the value of the first MCS field is not the first value or the value of the first MCS field is a second value from the downlink control information, the first type terminal device does not receive the PDSCH using the downlink control information. And if the second type terminal equipment determines that the value of the first MCS field is not the first value or the value of the first MCS field is the second value from the downlink control information, the downlink control information is used for receiving the PDSCH.
Please refer to the corresponding descriptions in steps 101 to 103 above, and the method for indicating the type of the terminal device scheduled by the downlink control information and the MCS of the PDSCH by the downlink control information through the first MCS field in the downlink control information is not described herein again.
In this embodiment of the present application, indicating, by a first MCS field in downlink control information, that the downlink control information is used for scheduling data transmission for a first type terminal device or a second type terminal device includes: scheduling data transmission for the first type of terminal device is indicated by the special bit state of the first MCS field (e.g., the special bit state may be that the states of all bits of the first MCS field are all 1 states), which is indicated by all bits of the first MCS field, and the probability of false alarm is lower, the MCS of the data transmission scheduled for the first type of terminal device indicated by the second MCS field may be increased. Or when the highest bit of the first MCS field is 1, the data transmission is indicated to be scheduled for the first type terminal equipment, the mode indication mode is simple, and the MCS of the data transmission scheduled for the first type terminal equipment can be indicated through the first MCS field.
As can be seen from the foregoing description of the communication method, the network device can transmit their respective downlink control information for different types of terminal devices. For example, the downlink control information with a smaller scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
Referring to fig. 3, a schematic view of an interaction flow between a network device and a terminal device according to an embodiment of the present application is shown, where the communication method according to the embodiment of the present application is described from a network device side in subsequent steps 301 to 303, and described from a terminal device side in subsequent steps 311 to 313, and mainly includes the following steps:
301. and the network equipment sends the downlink control information to the terminal equipment.
The network device may generate downlink control information, where the downlink control information includes a plurality of fields, for example, the downlink control information includes fields indicating frequency domain resources, time domain resources, modulation and coding schemes, and the like, which are required for receiving the PDSCH. In order to indicate the type of the scheduled terminal device, the network device may further scramble the downlink control information using different scrambling sequences. Scheduling data transmissions for different types of terminals is indicated by different scrambling sequences.
The scrambling sequence performed on the downlink control information can indicate the type of the terminal equipment scheduled by the downlink control information, so that independent downlink control information can be provided for different types of terminal equipment. When the downlink control information schedules different types of terminal equipment, the network equipment scrambles the downlink control information by adopting different scrambling sequences. The scrambling sequence and the type of the terminal equipment scheduled by the downlink control information have a corresponding relationship. The network device may determine which scrambling sequence to use for scrambling the downlink control information by steps 302 and 303 as follows. For the introduction of the type of the terminal device and the introduction of the PDSCH scheduled by the downlink control information, reference may be made to corresponding descriptions in the method shown in fig. 1, which are not described herein again.
302. When the downlink control information is used for scheduling data transmission of the first type terminal equipment, the network equipment scrambles the downlink control information by using a first scrambling sequence; or the like, or, alternatively,
303. and when the downlink control information is used for scheduling data transmission of the second type terminal equipment, the network equipment scrambles the downlink control information by using the second scrambling sequence.
Specifically, the downlink control information may be used to schedule data transmission of at least two different types of terminal devices, for example, the downlink control information may be used to schedule data transmission of a first type of terminal device (for example, to schedule PDSCH), or may be used to schedule data transmission of a second type of terminal device (for example, to schedule PDSCH). Wherein, the first type terminal device and the second type terminal device respectively represent different types of terminals. It is to be understood that the use of the downlink control information for scheduling data transmission of two different types of terminal devices is only one possible example, and the downlink control information may also be used for scheduling data transmission of three different types of terminal devices, or scheduling data transmission of more types of terminal devices, which is not limited herein.
In this embodiment, the network device may use different scrambling sequences to indicate the type of the terminal device scheduled by the downlink control information. In the embodiment of the application, the network device may configure a corresponding relationship between the type of the terminal device scheduled by the downlink control information and the scrambling sequence, and when the network device determines the type of the terminal device scheduled by the downlink control information, it may determine to use the scrambling sequence corresponding to the type of the scheduled terminal device, so as to provide independent control information for different types of terminal devices.
For example, the scrambling sequence generator may generate a first scrambling sequence and a second scrambling sequence, wherein the first scrambling sequence and the second scrambling sequence represent two different scrambling sequences, respectively. If the downlink control information is used for scheduling data transmission for the first type of terminal device, the downlink control information is scrambled by the first scrambling sequence. Or, if the downlink control information is used for scheduling data transmission for the second type terminal device, the downlink control information is scrambled by the second scrambling sequence. Therefore, when the terminal equipment analyzes the downlink control information, whether the downlink control information is the scheduling data transmission of the terminal equipment is determined according to the scrambling sequence adopted by descrambling the downlink control information.
In some embodiments of the present application, the initialization parameter used to generate the first scrambling sequence is a non-zero value and the initialization parameter used to generate the second scrambling sequence is equal to zero.
The network device may use a non-zero value as an initialization parameter, generate a first scrambling sequence by a scrambling sequence generator, and then scramble the downlink control information by using the first scrambling sequence to indicate a type of the terminal device scheduled by the downlink control information by using the first scrambling sequence. Or, the network device may generate a second scrambling sequence by the scrambling sequence generator using zero as an initialization parameter, and then scramble the downlink control information using the second scrambling sequence to indicate the type of the terminal device scheduled by the downlink control information through the second scrambling sequence. In the embodiment of the present application, the initialization parameter of the scrambling sequence may be a nonzero value or zero, so that when the terminal device analyzes the downlink control information, it is determined whether the downlink control information is data transmission scheduled by the terminal device according to the scrambling sequence used.
For example, as follows, the scrambling sequence generator generates a non-zero value for the initialization parameter of the first scrambling sequence. Alternatively, the initialization parameter for the scrambling sequence generator to generate the second scrambling sequence is equal to zero.
For example, the initialization parameter for generating the first scrambling sequence may be a system information-radio network temporary identifier (SI-RNTI), or the initialization parameter for generating the first scrambling sequence may be another type of Radio Network Temporary Identifier (RNTI), which is not limited in the embodiment of the present application.
Steps 301 to 303 describe the communication method provided by the embodiment of the present application from the network device side, and then describe the communication method provided by the embodiment of the present application from the terminal device side, which mainly includes the following steps:
311. the terminal device receives downlink control information from the network device.
For introduction of the downlink control information, reference may be made to the corresponding description in step 301, and details are not described here.
A certain type of terminal device may determine whether the downlink control information is sent to the certain type of terminal device according to whether the downlink control information can be descrambled correctly by using the respective scrambling sequence. Specifically, the terminal device performing step 311 may be a first type terminal device, or may be a second type terminal device, and is not limited herein.
312. When the downlink control information is scrambled by the first scrambling sequence or when the downlink control information is descrambled successfully by using the first scrambling sequence, the terminal equipment determines that the downlink control information is used for scheduling data transmission of the first type terminal equipment; or the like, or, alternatively,
313. when the downlink control information is scrambled by the second scrambling sequence, or when descrambling of the downlink control information using the second scrambling sequence is successful, the terminal device determines that the downlink control information is used for scheduling data transmission of the second type terminal device.
Illustratively, if the first type terminal device receives the downlink control information, determines that the downlink control information is scrambled by the first scrambling sequence, i.e., that descrambling of the downlink control information using the first scrambling sequence is successful, then the downlink control information is used to receive the PDSCH, and if the first type terminal device determines that the downlink control information is not scrambled by the first scrambling sequence, i.e., that descrambling of the downlink control information using the first scrambling sequence is not successful, then the downlink control information is not used to receive the PDSCH. And if the second type terminal equipment receives the downlink control information, determining that the downlink control information is not scrambled by the second scrambling sequence, namely the downlink control information cannot be descrambled successfully by using the second scrambling sequence, not using the downlink control information to receive the PDSCH, and if the downlink control information is determined to be scrambled by the second scrambling sequence, namely the downlink control information is descrambled successfully by using the second scrambling sequence, using the downlink control information to receive the PDSCH.
For introduction of the scrambling sequence, reference may be made to corresponding descriptions in steps 301 to 303 above, and details are not repeated here.
When the terminal device analyzes the downlink control information, whether the downlink control information is used for scheduling data transmission for the terminal device is determined according to the adopted scrambling sequence, so that the terminal device can correctly obtain the downlink control information sent to the terminal device by the network device.
As can be seen from the foregoing description of the communication method, the network device can transmit their respective downlink control information for different types of terminal devices. For example, the downlink control information with a smaller scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
Referring to fig. 4, a schematic view of an interaction flow between a network device and a terminal device according to an embodiment of the present application is shown, where the communication method according to the embodiment of the present application is described from a network device side in subsequent steps 401 to 403, and is described from a terminal device side in subsequent steps 411 to 413, and mainly includes the following steps:
401. the network equipment sends downlink control information to the terminal equipment, wherein the downlink control information comprises a first bit.
The network device may generate downlink control information, where the downlink control information includes a plurality of fields, for example, the downlink control information includes fields indicating frequency domain resources, time domain resources, modulation and coding schemes, and the like, which are required for receiving the PDSCH. In order to indicate the types of different scheduled terminal devices, the network device may further include a first bit in the downlink control information, and the first bit indicates which type of terminal device the data transmission is scheduled for.
Specifically, the first bit included in the downlink control information may be a newly added bit in the downlink control information, or may also be a reserved bit in the downlink control information, or an original bit in the downlink control information, which is not limited herein.
In the application embodiment, the downlink control information may be used to schedule data transmission of different types of terminal devices. The first bit included in the downlink control information may indicate a type of terminal equipment scheduled by the downlink control information, so that independent control information may be provided for different types of terminal equipment. In this embodiment of the present application, when the first bit is used to indicate different types of terminal devices scheduled by downlink control information, values of the first bit are different. The network device may determine the value of the first bit by either step 402 or step 403 as follows.
In this embodiment of the application, the network device may determine to execute the subsequent step 402 or 403 according to different types of terminal devices scheduled by the downlink control information, and specifically may determine according to the type of the terminal device that needs to be scheduled by the downlink control information in an actual application scenario.
402. When the downlink control information is used for scheduling data transmission of the first type terminal equipment, the network equipment determines that the value of the first bit is a third value; or the like, or, alternatively,
403. and when the downlink control information is used for scheduling data transmission of the second type terminal equipment, the network equipment determines that the value of the first bit is a fourth value.
Optionally, the third value is 1, and the fourth value is 0; alternatively, the third value is 0 and the fourth value is 1.
The downlink control information may be used for scheduling data transmission for at least two different types of terminal devices, for example, the downlink control information may be used for scheduling data transmission for a first type of terminal device. Or the downlink control information may be used for scheduling data transmission for the second type terminal device. Wherein, the first type terminal device and the second type terminal device respectively represent different types of terminals. It is to be understood that the use of the downlink control information for scheduling data transmission of two different types of terminal devices is only one possible example, and the downlink control information may also be used for scheduling data transmission of three different types of terminal devices, or scheduling data transmission of more types of terminal devices, which is not limited herein. For the introduction of the type of the terminal device and the introduction of the PDSCH scheduled by the downlink control information, reference may be made to corresponding descriptions in the method shown in fig. 1, which are not described herein again.
In this embodiment of the application, when the first bit is used to indicate different types of terminal devices for downlink control information scheduling, the value of the first bit is different, and the value of the first bit may be 1, for example, the value of the first bit may be a value other than 1, and for example, the value other than 1 may be 0.
Specifically, in this embodiment of the present application, a correspondence between a type of a terminal device scheduled by downlink control information and a value of a first bit may be predefined. That is, the correspondence relationship is known in advance by the network device and the terminal. Or, the network device may indicate the corresponding relationship to the terminal device through signaling before sending the downlink control information. That is, the network device knows the correspondence before the network device determines the downlink control information, and the terminal device knows the correspondence before the terminal device interprets the downlink control information. Then when the network device determines the type of the terminal device scheduled by the downlink control information, the value of the first bit can be determined, so that independent control information can be provided for different types of terminal devices.
There are various ways to implement the correspondence between the type of the terminal device scheduled by the downlink control information and the value of the first bit. For example, when the downlink control information is used for scheduling data transmission of the first type terminal device, determining the value of the first bit as a third value; or, when the downlink control information is used for scheduling data transmission of the second type terminal device, determining the value of the first bit as a fourth value.
It is to be appreciated that in other embodiments of the present application, when the downlink control information is used to schedule data transmission for the first type of terminal device, the network device determines the value of the first bit to be a fourth value; or, when the downlink control information is used for scheduling data transmission of the second type terminal device, the network device determines that the value of the first bit is the third value. This implementation is similar to step 402 and step 403, and will not be described here.
Steps 401 to 403 describe the communication method provided by the embodiment of the present application from the network device side, and then describe the communication method provided by the embodiment of the present application from the terminal device side, which mainly includes the following steps:
411. the terminal equipment receives downlink control information from the network equipment, wherein the downlink control information comprises a first bit.
For the introduction of the downlink control information and the first bit, reference may be made to the above steps 401 to 403, and details are not described here.
The terminal device performing step 411 may be a first type terminal device or a second type terminal device, and is not limited herein.
412. When the value of the first bit is a third value, the terminal equipment determines that the downlink control information is used for scheduling data transmission of the first type terminal equipment; or the like, or, alternatively,
413. and when the value of the first bit is a fourth value, the terminal equipment determines that the downlink control information is used for scheduling data transmission of the second type terminal equipment.
Optionally, the third value is 1, and the fourth value is 0; alternatively, the third value is 0 and the fourth value is 1.
Illustratively, if the first type terminal device receives downlink control information, if the value of the first bit in the downlink control information is a third value, the downlink control information is used to receive the PDSCH, and if the value of the first bit in the downlink control information is not the third value or the value of the first bit is a fourth value, the downlink control information is not used to receive the PDSCH. If the second type terminal device receives the downlink control information, if the value of the first bit in the downlink control information is a third value or the value of the first bit is not a fourth value, the downlink control information is not used for receiving the PDSCH, and if the value of the first bit in the downlink control information is the fourth value, the downlink control information is used for receiving the PDSCH.
As can be seen from the foregoing description of the communication method, in the embodiment of the present application, the first bit in the downlink control information indicates that the downlink control information is used to schedule data transmission for the first type terminal device or the second type terminal device. The indication mode is simple, and the complexity of the realization of the terminal equipment and the network equipment is low. By the method, the network equipment can send the downlink control information with different characteristics for different types of terminal equipment. For example, the downlink control information with a larger scheduling bandwidth is sent to the first type terminal device, or the downlink control information with a larger scheduling bandwidth is sent to the second type terminal device, so that the scheduling requirements of different types of terminal devices can be met.
The embodiment of the application provides a communication method, which is suitable for a communication scene between network equipment and terminal equipment. The terminal equipment is the terminal equipment with limited bandwidth capability, and the method configures special resources for the terminal equipment with limited bandwidth capability, so that the terminal equipment can monitor and schedule a control channel for data transmission in the special resources. The control information may be PDCCH, EPDCCH, or other types of physical layer downlink control channels.
When the terminal device detects a control channel, a group of candidate control channels is monitored on a control resource set (core set) according to a Search Space (SS), and the terminal device uses an RNTI corresponding to a control channel expected to be received to perform blind detection on DCI carried on the control channel.
In the embodiment of the present application, the search space of the PDCCH may be configured or indicated for the terminal device by the network device through Radio Resource Control (RRC) signaling, for example. The network device may configure one or more search spaces for the terminal device. For a terminal device, the RRC signaling may be specific to the terminal device, or may be shared (common) with other terminal devices, and the embodiment of the present application is not limited thereto.
For a search space, the network device may configure the terminal device with the type of search space being either a common search space or a terminal device specific search space. Furthermore, the network device may also configure one or more of the following parameters of the search space for the terminal device: aggregation level size, the number of candidate PDCCHs, detection period, time domain resource position and format of DCI transmitted in a search space. For example, formats of DCI in one common search space may be configured to be 0_0 and 1_ 0. For another example, the formats of DCI in one terminal device specific search space may be configured to be 0_1 and 1_1, or the formats of DCI in one terminal device specific search space may be configured to be 0_0 and 1_ 0. Wherein, the time domain resource location includes: the search space is offset in a first time unit (e.g., slot) in the detection period, the number of consecutive first time units occupied by the search space in the detection period, the offset of a second time unit (e.g., symbol) of the search space in each first time unit, and the number of second time units occupied by the search space in each first time unit.
Optionally, the frequency domain resource location of the search space and the number of the second time units of the search space in each first time unit may be configured as follows: the network device indicates, to the terminal device, a control resource set (CORESET) corresponding to the search space, where a parameter of the CORESET may be regarded as a parameter of the search space, and the control resource set may also be referred to as a control resource set. The network device indicates at least one of the following parameters of the CORESET through a Master Information Block (MIB) or RRC signaling: frequency domain resource location, and the number of second time units of the CORESET in each first time unit. Optionally, one CORESET may correspond to one search space, or may correspond to a plurality of different search spaces, which is not limited in the embodiment of the present application.
Illustratively, the search space a corresponds to CORESET a, which occupies 3 symbols in the time domain. The detection period of the search space a is 10 slots, the offset of the search space a in the detection period is 3 slots, the consecutive slots occupied by the search space a in the detection period are 2 slots, and the symbol offset of the search space a in each slot is 3 symbols. Then the frequency domain resource location of the search space a is the frequency domain resource location of CORESET a, and the time domain resource location of the search space a is: in each of 10 slots, starting from the 3 rd symbol in each of the 4 th and 5 th slots, the time domain resources of the search space a occupy 3 symbols in total. The time-frequency resources resulting from the frequency-domain resource locations and time-domain resource locations of search space a may be referred to as the time-frequency resources indicated by search space a and CORESET a.
In the embodiment of the present application, the MIB is carried in a Physical Broadcast Channel (PBCH). The network device may periodically transmit the PBCH to the terminal device along with a Synchronization Signal (SS). The PBCH and the SS are information that needs to be received when the terminal device accesses the cell.
For example, when the terminal device initially accesses the network, the MIB is configured with a control resource set CORESET0 and a common Search Space0, and the terminal device schedules the control information of the SIB1 on the CORESET0 according to the Search Space0 blind detection. For example, CORESET0 may be configured with 1 to 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and the number of resource blocks configurable in the frequency domain by CORESET0 is any one of {24,48,96 }.
The resources of one control channel include: one or more Control Channel Elements (CCEs) in a control resource set. The number of CCEs carrying one control channel is referred to as the aggregation level of the control channel. One CCE is configured by 6 Resource Element Groups (REGs) that are consecutive in the time domain and the frequency domain. Wherein one REG consists of one OFDM symbol in the time domain and 12 subcarriers in the frequency domain. The mapping mode of CCE to REG in the control resource set comprises interleaving and non-interleaving.
As shown in fig. 5, a schematic diagram of non-interleaved mapping between CCEs and REGs in a control channel with an aggregation level of 2 is provided for the embodiment of the present application. REG0, REG1, REG2, REG3, REG4, REG5 and CCE0 have a mapping relationship, and REG0, REG1, REG2, REG3, REG4 and REG5 are bound together and referred to as one REG bundle (bundle). REG6, REG7, REG8, REG9, REG10, REG11 and CCE1 have a mapping relationship, REG12, REG13, REG14, REG15, REG16, REG17 and CCE2 have a mapping relationship, and REG18, REG19, REG20, REG21, REG22, REG23 and CCE3 have a mapping relationship. Exemplarily, the aggregation level of one control channel is 2, and CCE0 and CCE1 are used to carry one control channel PDCCH.
As shown in fig. 6, a schematic diagram of interleaving and mapping CCEs and REGs in a control channel with an aggregation level of 2 is provided for the embodiment of the present application. The 6 REGs are one interleaving granularity, called REG bundling, with an interleaving depth of 2. Exemplarily, the aggregation level of one control channel is 2, and CCE0 and CCE1 are used to carry one control channel PDCCH.
Further, the control channels of different aggregation levels include one or more candidate location resources on the set of control resources. For example, in CORESET0, a control channel with an aggregation level of 4 corresponds to 4 candidate location resources, a control channel with an aggregation level of 8 corresponds to 2 candidate location resources, and a control channel with an aggregation level of 16 corresponds to 1 candidate location resource.
As shown in fig. 7a, a schematic diagram of a mapping relationship between candidate location resources of control channels with different Aggregation Levels (ALs) and CCEs is provided in the embodiment of the present application. There are many control resource sets, for example, a control resource set configured by a network device for a terminal device may include CORESET0 to CORESET 3, and then, taking CORESET0 as an example, assuming that CORESET0 is composed of 48 resource blocks in the frequency domain and 3 OFDM symbols in the time domain, CCEs of the same padding pattern in fig. 7a are used to carry the same control channel. Wherein, the resources corresponding to the 48 resource blocks and the 3 OFDM symbols include 48 × 3 — 144 REGs. One REG bundle includes 6 REGs, and the 144 REGs can obtain 24 REG bundles. For example, when the REG bundle index is 0 to 23 and AL of the control channel is 16, the REG bundle indexes constituting 16 CCEs are 0 to 7 and 12 to 19. When the AL of the control channel is 8, the REG bundle indexes forming 8 CCEs are 0-3 and 12-15. Or the REG bundle indexes forming 8 CCEs are 4-7 and 16-19. When the AL of the control channel is 4, the REG bundle index constituting 4 CCEs is: 0 to 1 and 12 to 13, or 2 to 3 and 14 to 15, or 6 to 7 and 18 to 19, or 8 to 9 and 20 to 21. Since the mapping of CCEs to REGs on CORESET0 is an interleaving mapping, and the interleaving depth is 2, the CCEs constituting the control channel are equally divided into two parts, which are mapped on the control resource set, respectively. If the bandwidth capability of the terminal device is smaller than the bandwidth of the CORESET0, the terminal device may not be able to monitor the complete control channel. E.g., 1/2 where the bandwidth capability of the end device is the bandwidth of CORESET0, then only half of the control channel can be received by the end device. For example, for a control channel with AL equal to 16, the terminal device can only receive REG bundles with indexes of 0 to 7 on CORESET0, or the terminal device can only receive REG bundles with indexes of 12 to 19 on CORESET 0. It is therefore necessary to configure dedicated resources for transmitting control channels for terminal devices with limited bandwidth capabilities.
As shown in fig. 7b, a schematic diagram of a mapping relationship between candidate location resources of control channels of different ALs and CCEs is provided in the embodiment of the present application. The control resource set consists of 96 resource blocks in the frequency domain and 3 OFDM symbols in the time domain, and CCEs with the same padding pattern in fig. 7b are used to carry the same control channel. Wherein, the resources corresponding to the 96 resource blocks and the 3 OFDM symbols include 96 × 3 — 288 REGs. One REG bundle includes 6 REGs, and the 288 REGs can obtain 48 REG bundles. For example, when the index of REG bundle is 0 to 47 and AL of the control channel is 16, the index of REG bundle constituting 16 CCEs is 0 to 7 and 24 to 31. When the AL of the control channel is 8, the REG bundle indexes forming 8 CCEs are 0-3 and 24-27. Or the REG bundle indexes forming 8 CCEs are 12-15 and 36-39. When the AL of the control channel is 4, the REG bundle index constituting 4 CCEs is: 0 to 1 and 24 to 25, or 6 to 7 and 30 to 31, or 12 to 13 and 36 to 37, or 18 to 19 and 42 to 43.
In the embodiment of the application, the bandwidth capacity of the terminal device with limited bandwidth is greater than or equal to 1/2 or 1/4 of the bandwidth of the control resource set. The network device may send a control channel for scheduling data transmission for the terminal device on a resource corresponding to both the first set of resources and the second set of resources, i.e., a larger resource for sending the control channel is divided into a plurality of smaller resources. Illustratively, the terminal device is a first type of terminal device, and the control channel used for scheduling data transmission may also be referred to as a first control channel. For the introduction of the first type of terminal device, reference may be made to the foregoing description, and details are not repeated here. The first set of resources and the second set of resources are resources in different time domain resource units. Wherein, the time domain resource unit may be one of the following resource units: radio frame, subframe, symbol, time window, time slot. For example, the first set of resources is in a first time slot Nx, the second set of resources is in a second time slot Nx + Ky, where Nx, Ky are integers, and Ky is greater than 0. Wherein the frequency domain resources of the first set of resources and the second set of resources may be the same or different. Optionally, the first resource set and the second resource set have the same resource size. The first set of resources and the second set of resources may be resources within the controlling set of resources or resources outside the controlling set of resources.
Illustratively, the first control channel aggregation level is 8, and the first control channel is transmitted using 4 CCEs on the first set of resources and 4 CCEs on the second set of resources. The first type terminal equipment receives the information on the first resource set in the first time domain resource unit and receives the information on the second resource set in the second time domain resource unit, and the first type terminal equipment obtains a complete first control channel from the information received twice.
It should be noted that, in the embodiment of the present application, the control channel transmission is transmission or reception. If one end of the communication implements transmission as transmission, the opposite end of the communication implements reception.
In this embodiment, the sizes of the first resource set and the second resource set are divided as follows according to different configurations of the control resource set. The basis of the division is as follows: the bandwidth of the first resource set and the bandwidth of the second resource set are respectively less than or equal to the bandwidth supported by the first type terminal equipment; the control channels sent on the first resource set and the second resource set support multiple aggregation levels; the first set of resources and the second set of resources occupy as little as possible of the candidate position resources of the control channel of the legacy terminal device on the set of control resources. The legacy terminal device may be an eMBB terminal device or a URLLC terminal device.
Specifically, the control resource set includes N resource blocks in the frequency domain. The control resource set includes B symbols in the time domain. Wherein for N equal to 48 or 96 and B equal to 1 or 2, the candidate position resources of the control channel of the legacy terminal device occupy the entire set of control resources. If the first resource set and the second resource set are resources in the control resource set, the first resource set and the second resource set need to multiplex a part of candidate position resources of the control channel of the legacy terminal device.
Exemplarily, for N-48 and B-1, the control resource set includes 8 CCEs. The control resource set is averagely divided into 4 blocks of resources, each block of resources comprises 2 CCEs, and the first resource set and the second resource set respectively comprise only one block of resources. Or the like, or, alternatively,
for N-48, B-2, the control resource set includes 16 CCEs. The control resource set is averagely divided into 4 blocks of resources, each block of resources comprises 2 CCEs, and the first resource set and the second resource set respectively comprise only one block of resources. Or the like, or, alternatively,
for N-48, B-3, the control resource set includes 24 CCEs. If the control resource set is averagely divided into 4 blocks of resources, the first resource set and the second resource set respectively comprise one block of resources. For example, in fig. 7a, if the candidate position resource of the control channel of the first type terminal device is in the control resource set, the first resource set and the second resource set occupy any two resources of 4 blocks of resources, which may result in that the resource corresponding to one candidate control channel with aggregation level 8 of the conventional terminal device is unavailable. Therefore, in this embodiment, the control resource set is divided into 6 pieces of resources on average, and the first resource set and the second resource set respectively include only one piece of resource, i.e. 4 CCEs. When the REG bundle indexes occupied by the first resource set and the second resource set are 8-11 and 20-23, the candidate position resources of the control channel of the traditional terminal equipment are not influenced.
For N96, B1, the control resource set includes 16 CCEs. The control resource set is divided equally into 4 blocks of resources, each block of resources comprising 4 CCEs. The first set of resources and the second set of resources each comprise only 1 block of resources. Or the like, or, alternatively,
for N96, B2, the control resource set includes 32 CCEs. The control resource set is divided equally into 4 blocks of resources, each block of resources comprising 8 CCEs. The first set of resources and the second set of resources each comprise only 1 block of resources. Or the like, or, alternatively,
for N96, B3, the control resource set includes 48 CCEs. If the control resource set is divided into 4 pieces of resources on average, the first resource set and the second resource set respectively only include 1 piece of resources. Exemplarily, fig. 8 illustrates candidate position resources of control channels of different ALs of a legacy terminal device in such a control resource set configuration, and CCEs of the same pattern constitute candidate resources of one control channel. If the candidate position resources of the control channel of the first type terminal device are in the control resource set, the first resource set and the second resource set occupy any two of the 4 blocks of resources, which may affect at least the candidate position resources of the three control channels of the conventional terminal device. Therefore, in this embodiment, the control resource set is divided into 6 pieces of resources on average, and the first resource set and the second resource set respectively include only one piece of resource, i.e. 8 CCEs. And when the REG bundle indexes occupied by the first resource set and the second resource set are 16-23 and 40-47, only one candidate position resource of the control channel of the second type terminal equipment is influenced.
According to the above division of the control resource sets, when the control resource sets are configured differently, the first resource set only includes N/4 resource blocks in the frequency domain, and the second resource set only includes N/4 resource blocks in the frequency domain. Or the first resource set only comprises N/6 resource blocks in the frequency domain, and the second resource set only comprises N/6 resource blocks in the frequency domain.
Referring to fig. 8, which is a schematic view illustrating an interaction flow between a network device and a terminal device according to an embodiment of the present application, a communication method according to the embodiment of the present application is described from a network device side in subsequent steps 801 to 802, and is described from a terminal device side in subsequent steps 811 to 812, which mainly includes the following steps:
801. the network equipment sends configuration information of the control resource set to the terminal equipment, wherein the configuration information of the control resource set is used for indicating the configuration information of the first resource set and the configuration information of the second resource set.
811. The terminal equipment receives configuration information of a control resource set from the network equipment, wherein the configuration information of the control resource set is used for indicating the configuration information of the first resource set and the configuration information of the second resource set.
For an introduction of the control resource set CORESET, please refer to the foregoing, and will not be described herein again.
The network device may generate configuration information of the control resource set, for example, the configuration information of the control resource set may be configuration information of core set 0. The configuration information of the control resource set may indicate a frequency domain resource location, a frequency domain resource size, and a time domain resource size of the control resource set. The network device may send configuration information of the control resource set to the terminal device, for example, the network device sends the configuration information of the control resource set to the terminal device through a radio resource control signaling or a medium access control signaling. Wherein the terminal device may be a first type terminal device.
It is to be understood that the network device configures two resource sets for the terminal device only by way of example, and the network device may also configure three resource sets for the terminal device, or configure more resource sets, which is not limited herein.
In this embodiment of the application, the network device may indicate the configuration information of the first resource set and the configuration information of the second resource set through the configuration information of the control resource set, so that after the terminal device receives the configuration information of the control resource set, the terminal device may obtain the configuration information of the first resource set and the configuration information of the second resource set through the configuration information of the control resource set, and thus the first control information may be monitored on the first resource set and the second resource set.
The terminal device may determine a certain fixed frequency domain resource position in the first resource set according to the configuration information of the first resource set, and may determine a certain fixed frequency domain resource position in the second resource set according to the configuration information of the second resource set.
In this embodiment, there are various ways for controlling the configuration information of the resource set to indicate the configuration information of the first resource set and the configuration information of the second resource set, and the following description is given by way of example.
In some embodiments of the present application, the configuration information of the control resource set is used to indicate configuration information of the first resource set and configuration information of the second resource set, and includes:
the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of an s-th frequency domain resource in the first resource set is offset from a frequency domain position of a t-th frequency domain resource in the first control resource set by a first offset amount, and a frequency domain position of an r-th frequency domain resource in the second resource set is offset from a frequency domain position of a p-th frequency domain resource in the first resource set by a second offset amount, wherein s, t, r, and p are integers greater than 0.
Specifically, the configuration information of the control resource set indicates a frequency domain resource location of the first control resource set, for example, the configuration information of the control resource set indicates a starting frequency domain resource location of the first control resource set, or the configuration information of the control resource set indicates any one frequency domain resource location of the first control resource set, or the configuration information of the control resource set indicates all frequency domain resource locations of the first control resource set, which is not limited herein. The first control resource set includes N frequency domain resources, a tth frequency domain resource in the first control resource set may be any one of the frequency domain resources in the first control resource set, and a value of t may be any one of 1 to N. Illustratively, the configuration information of the control resource set indicates that a starting frequency domain resource position in the first control resource set is a resource block with an index of 0, and the terminal device determines a resource block with a frequency domain position of a t (t ═ 2) th frequency domain resource in the first control resource set as an index of 1 according to the starting frequency domain resource position in the first control resource set.
And determining the resources in the first resource set according to the resources in the first control resource set. For example, the frequency domain position of the s-th frequency domain resource in the first set of resources is offset from the frequency domain position of the t-th frequency domain resource in the first set of control resources by a first offset amount. The first offset is a predetermined value or a value notified to the terminal device by the network device. The s-th frequency domain resource in the first set of resources may be any one of the first set of resources. Optionally, the offset in this application embodiment, for example, the first offset, the second offset, or another offset, may be 0, a positive integer, or a negative integer, and this application embodiment is not limited. Wherein a negative integer may represent a shift toward a decrease in frequency, and a positive integer may represent a shift toward an increase in frequency; alternatively, a negative integer may represent a shift toward an increase in frequency, and a positive integer may represent a shift toward a decrease in frequency.
And determining the resources in the second resource set according to the resources in the first resource set. For example, the frequency domain position of the r-th frequency domain resource in the second set of resources is offset from the frequency domain position of the p-th frequency domain resource in the first set of resources by a second offset amount. The second offset is a predetermined value or a value notified to the terminal device by the network device. The p-th frequency domain resource in the first set of resources may be any one of the first set of resources. The r-th frequency domain resource in the second set of resources may be any one of the resources in the second set of resources.
It should be noted that s, t, r, and p are integers greater than 0, and specific values of s, t, r, and p are not limited, for example, s is equal to 1, the frequency domain position of the s-th frequency domain resource may be the starting frequency domain position in the first resource set, the index of the starting frequency domain position may be 0, and the number meanings represented by t, r, and p are similar to this, and are not described one by one. In addition, the first offset and the second offset may be values pre-configured in the system, or values notified to the terminal device by the network device through signaling, and the determining manners of the first offset and the second offset may be the same or different, which is not limited herein.
Further, in some embodiments of the present application, the first offset is an integer multiple of N/M, where N is the number of frequency domain resource units included in the first control resource set, M is a positive integer, and/is a division symbol.
The frequency domain resource unit is a resource unit of the control resource set in the frequency domain, for example, the frequency domain resource unit may be one of the following information: control channel unit, resource block, resource unit, resource block group, resource unit group, subcarrier interval. N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein.
Specifically, M may be a positive integer, and M may take various values, for example, M may take a value of 4 or 6, and M may also take other values, which is not limited herein.
It is understood that the first offset is an integer multiple of N/M, for example, the first offset is 1 or 2 or i times of the value obtained after N/M, and i is a positive integer. In addition, the result of N/M may be an integer, and if the result of N/M is not an integer, the result of N/M may be rounded up or rounded down, which is not limited herein.
Further, in some embodiments of the present application, the second offset is an integer multiple of N/E, where N is the number of frequency domain resource units included in the first control resource set, E is a positive integer, and/is a division symbol.
Wherein N is the number of frequency domain resource units included in the first control resource set. For example, N may take the value of 48 or 96. N may also take other values and is not limited herein.
Specifically, E may be a positive integer, and the value of E may be various, for example, the value of E may be 4 or 6, and E may also take other values, which is not limited herein.
It is understood that the second offset is an integer multiple of N/E, for example, the second offset is 1 or 2 times or j times of the value obtained after N/E, and j is a positive integer. In addition, the result of N/E may be an integer, and if the result of N/E is not an integer, the result of N/E may be rounded up or rounded down, which is not limited herein.
For example, the network device determines frequency domain resource locations (frequency domain locations for short) of the first set of resources and the second set of resources.
For example, s, t, r, p all equal 1. The control resource set includes N resource blocks in the frequency domain. The indexes of the N resource blocks are respectively { I0,...,IN-1}. N is an integer greater than 0.
M is equal to 4, the first offset is
(or simply as
) I is 0,1,2,3, and the index of the starting frequency domain resource of the first resource set is
Further, E is equal to 2, then the second offset is
(or simply as
) J is 0,1, and the index of the starting frequency domain resource of the second resource set is
Or, M equals 6, then the first offset is
i is 0,1,2,3,4,5, and the index of the starting frequency domain resource of the first resource set is
Further, E is equal to 2, then the second offset is
j is 0,1, and the index of the starting frequency domain resource of the second resource set is
As another example, s, t, r, and p all equal N. The control resource set includes N resource blocks in the frequency domain. Index of N resource blocks is { I0,…,IN-1}. N is an integer greater than 0.
M is equal to 4, the first offset is
(or simply as
) I is 0,1,2,3, and the index of the nth resource block of the first resource set is
Further, E is equal to 2, then the second offset is
(or simply as
) J is 0,1, and the index of the nth resource block of the second resource set is
Or, M equals 6, then the first offset is
(or simply as
) I is 0,1,2,3,4,5,6, and the index of the nth resource block of the first resource set is
Further, E is equal to 2, then the second offset is
(or simply as
) J is 0,1, and the index of the nth resource block of the second resource set is
In some embodiments of the present application, the configuration information of the control resource set is used to indicate configuration information of the first resource set and configuration information of the second resource set, and includes:
the configuration information for the control resource sets indicates frequency domain resource locations for the first control resource set. The frequency domain position of the vth frequency domain resource in the first resource set is shifted from the frequency domain position of the w frequency domain resource in the first control resource set by a third offset amount, and the frequency domain position of the xth frequency domain resource in the second resource set is shifted from the frequency domain position of the yth frequency domain resource in the first control resource set by a fourth offset amount, where v, w, x, and y are integers greater than 0.
Specifically, the configuration information of the control resource set indicates a frequency domain resource location of the first control resource set, for example, the configuration information of the control resource set indicates a starting frequency domain resource location of the first control resource set, or the configuration information of the control resource set indicates any one frequency domain resource location of the first control resource set, or the configuration information of the control resource set indicates all frequency domain resource locations of the first control resource set, which is not limited herein. For example, the configuration information of the control resource set indicates a starting frequency domain resource position in the first control resource set, and the terminal device determines the frequency domain position of the w-th frequency domain resource in the first control resource set according to the starting frequency domain resource position in the first control resource set. Wherein the w-th frequency domain resource in the first control resource set may be any one frequency domain resource in the first control resource set. The y-th frequency domain resource in the first set of control resources may be any one of the frequency domain resources in the first set of control resources. Likewise, the y-th frequency domain resource in the first set of control resources may also be determined. The w-th frequency domain resource in the first control resource set and the y-th frequency domain resource in the first control resource set may be the same frequency domain resource or different frequency domain resources, which is not limited in this embodiment of the application.
And determining the resources in the first resource set according to the resources in the first control resource set. For example, the frequency domain position of the vth frequency domain resource in the first resource set is offset from the frequency domain position of the w frequency domain resource in the first control resource set by the third offset amount. The third offset is a predetermined value or a value notified to the terminal device by the network device. The vth frequency domain resource in the first resource set may be any one resource in the first resource set.
And determining the resources in the second resource set according to the resources in the first control resource set. For example, the frequency domain position of the xth frequency domain resource in the second set of resources is offset from the frequency domain position of the yth frequency domain resource in the first set of control resources by a fourth offset amount. The fourth offset is a predetermined value or a value notified to the terminal device by the network device. The xth frequency-domain resource in the second set of resources may be any one of the resources in the second set of resources.
It is to be understood that v, w, x, and y are integers greater than 0, and specific values of v, w, x, and y are not limited, for example, w is equal to 1, the frequency domain position of the vth frequency domain resource may be a starting frequency domain position in the first resource set, the index of the starting frequency domain position may be 0, and the number meanings represented by w, x, and y are similar to this, and are not described one by one. In addition, the third offset and the fourth offset may be pre-configured values or values that are notified to the terminal device by the network device through signaling, and the determination manners of the third offset and the fourth offset may be the same or different, which is not limited herein.
For example, the configuration information of the control resource set may indicate a relationship between a frequency domain resource location of the first control resource set, a frequency domain location of the first resource set and a frequency domain location of the second resource set, and a frequency domain location of the control resource set, including any of the following:
the frequency domain resource locations of the first set of resources and the frequency domain resource locations of the second set of resources are included in the frequency domain resource locations of the first set of control resources; or the like, or, alternatively,
the frequency domain resource position of the first resource set is included in the frequency domain resource position of the first control resource set, the offset of the frequency domain resource position of the second resource set relative to the frequency domain resource position of the first resource set is offset 1, that is, the frequency domain resource position of the second resource set can be obtained after the frequency domain resource position of the first resource set is offset according to the offset 1, the frequency domain resources of the second resource set and the first control resource set can be overlapped, or the second resource set is outside the first control resource set; or the like, or, alternatively,
the frequency domain resource position of the second resource set is included in the frequency domain resource position of the first control resource set, the offset of the frequency domain resource position of the first resource set relative to the frequency domain resource position of the second resource set is offset 2, that is, the frequency domain resource position of the first resource set can be obtained after the frequency domain resource position of the second resource set is offset according to the offset 2, the frequency domain resources of the first resource set and the first control resource set can be overlapped, or the first resource set is outside the first control resource set; or the like, or, alternatively,
the frequency domain resource position of the first resource set is offset 3 relative to the frequency domain resource position of the first control resource set, the frequency domain resource position of the second resource set is offset 4 relative to the frequency domain resource position of the first resource set, that is, the frequency domain resource position of the first resource set can be obtained after the frequency domain resource position of the first control resource set is offset according to the offset 3, and the frequency domain resource position of the second resource set can be obtained after the frequency domain resource position of the first resource set is offset according to the offset 4. The frequency domain resources of the first set of resources and the first set of control resources may overlap, or the first set of resources is outside the first set of control resources, the frequency domain resources of the second set of resources and the first set of control resources may overlap, or the second set of resources is outside the first set of control resources; or the like, or, alternatively,
the frequency domain resource position of the second resource set is offset 5 relative to the frequency domain resource position of the first control resource set, the frequency domain resource position of the first resource set is offset 6 relative to the frequency domain resource position of the second resource set, that is, the frequency domain resource position of the second resource set can be obtained after the frequency domain resource position of the first control resource set is offset according to the offset 5, and the frequency domain resource position of the first resource set can be obtained after the frequency domain resource position of the second resource set is offset according to the offset 6. The frequency domain resources of the first set of resources and the first set of control resources may overlap, or the first set of resources is outside the first set of control resources, the frequency domain resources of the second set of resources and the first set of control resources may overlap, or the second set of resources is outside the first set of control resources.
The unit of the offset may be a frequency domain resource unit, for example, offset 1 may be 1 frequency domain resource unit or 3 frequency domain resource units, and the frequency domain resource unit may be one of the following parameters: resource block, resource unit, resource block group, control channel unit, resource unit group. E.g., an offset equal to {1, 2,3,4,5,6 }.
Further, in some embodiments of the present application, the third offset is an integer multiple of N/F, where N is the number of frequency domain resource units included in the first control resource set, F is a positive integer, and/is a division symbol.
Wherein N is the number of frequency domain resource units included in the first control resource set. For example, when the frequency domain resource unit is a resource block, N takes a value of 48 or 96. N may also take other values and is not limited herein. Specifically, F may be a positive integer, and F may take various values, for example, F may take 4 or 6, and F may also take other values, which is not limited herein.
It is understood that the third offset is an integer multiple of N/F, for example, the third offset is 1 or 2 or k times of the value obtained after N/F, and k is a positive integer. In addition, the result of N/F may be an integer, and if the result of N/F is not an integer, the result of N/F may be rounded up or rounded down, which is not limited herein.
Further, in some embodiments of the present application, the fourth offset is an integer multiple of N/G, where N is the number of frequency domain resource units included in the first control resource set, G is a positive integer, and/is a division symbol.
Wherein N is the number of frequency domain resource units included in the first control resource set. For example, when the frequency domain resource unit is a resource block, N takes a value of 48 or 96. N may also take other values and is not limited herein.
Specifically, G may be a positive integer, and G may take various values, for example, G may take 4 or 6, and G may also take other values, which is not limited herein.
It is understood that the fourth offset amount is an integer multiple of N/G, for example, the fourth offset amount is 1 or 2 times or q times of the value obtained after N/G, and q is a positive integer. In addition, the result of N/G may be an integer, and if the result of N/G is not an integer, the result of N/G may be rounded up or rounded down, which is not limited herein.
For example, the network device determines frequency domain resource locations (frequency domain locations for short) of the first set of resources and the second set of resources.
For example, v, w, x, and y all equal 1. The control resource set includes N resource blocks in the frequency domain. The indexes of the N resource blocks are respectively { I0,...,IN-1}. N is an integer.
F is equal to 4, the third offset is
k is 0,1,2,3, and the index of the starting frequency domain resource of the first resource set is
Further, G is equal to 4, then the fourth offset is
q is 0,1,2,3, and the index of the starting frequency domain resource of the second resource set is
Or, F equals 6, then thirdOffset is as follows
k is 0,1,2,3,4,5, and the index of the starting frequency domain resource of the first resource set is
Further, G equals 6, then the fourth offset is
q is 0,1,2,3,4,5, and the index of the starting frequency domain resource of the second resource set is
As another example, v, w, x, and y are all equal to N. The control resource set includes N resource blocks in the frequency domain. The indexes of the N resource blocks are respectively { I0,…,IN-1}. N is an integer greater than 0.
F is equal to 4, the third offset is
(or simply as
) K is 0,1,2,3, and the index of the nth resource block of the first resource set is
Further, G is equal to 4, then the fourth offset is
(or simply as
q is 0,1,2,3, and the index of the nth resource block of the second resource set is
Or, F equals 6, then the third offset is
(or simply as
) K is 0,1,2,3,4,5, and the index of the nth resource block of the first resource set is
Further, G equals 6, then the fourth offset is
(or simply as
) Q is 0,1,2,3,4,5, and the index of the nth resource block of the second resource set is
In some embodiments of the present application, the first set of resources includes N/H frequency domain resource units in the frequency domain, where N is the number of frequency domain resource units included in the first set of control resources, H is a positive integer,/is a division symbol.
Where N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein. Specifically, H may be a positive integer, and H may take various values, for example, H may take 4 or 6, and H may also take other values, which is not limited herein.
It is understood that the frequency domain resource units included in the first resource set are N/H, and the result of N/H may be an integer, and if the result of N/H is not an integer, the result of N/H may be rounded up or rounded down, which is not limited herein.
In some embodiments of the present application, the second set of resources includes N/U frequency domain resource units in the frequency domain, where N is the number of frequency domain resource units included in the first set of control resources, U is a positive integer,/is a division symbol.
Where N is the number of frequency domain resource units included in the first control resource set, for example, the value of N is 48 or 96, and N may also take other values, which is not limited herein. Specifically, U may be a positive integer, and U may take various values, for example, U may take a value of 4 or 6, and U may also take other values, which is not limited herein.
It is understood that the second resource set includes frequency domain resource units of N/U, and the result of N/U may be an integer, and if the result of N/U is not an integer, the result of N/U may be rounded up or rounded down, which is not limited herein.
For example, the first communications device determines time-frequency resource sizes for the first set of resources and the second set of resources from the set of control resources.
For example, the set of control resources includes N resource blocks in the frequency domain. The control resource set comprises B symbols in time domain, and indexes of N resource blocks are { I }respectively0,...,IN-1}. B and N are positive integers. For example, N ═ 48 or 96, and B ═ 1 or 2. The first set of resources comprises N/4 resource blocks in the frequency domain and the first set of resources comprises B symbols in the time domain. The second set of resources comprises N/4 resource blocks in the frequency domain and the second resource comprises B symbols in the time domain.
For example, N ═ 48 or 96, and B ═ 3. The first set of resources comprises N/6 resource blocks in the frequency domain and the first set of resources comprises B symbols in the time domain. The first set of resources comprises N/6 resource blocks in the frequency domain and the first set of resources comprises B symbols in the time domain.
In some embodiments of the present application, for a network device, the network device may further perform the following steps: and the network equipment sends configuration information of a search space to the terminal equipment, wherein the configuration information of the search space is used for indicating the time domain position of the first resource set and the time domain position of the second resource set.
In some embodiments of the present application, for the terminal device, the terminal device may further perform the following steps: the terminal device receives configuration information of a search space from the network device, wherein the configuration information of the search space is used for indicating a time domain position of the first resource set and a time domain position of the second resource set.
The network device may further generate configuration information of the search space, for example, the configuration information of the search space may be configuration information of the search space set. Specifically, the search space includes a common search space and a dedicated search space, and provides a monitoring opportunity of the PDCCH, an aggregation level of the CCE, a DCI format to be detected, and other configuration parameters.
In this embodiment of the application, after the network device configures the first resource set and the second resource set for the terminal device, the network device may indicate a time domain position of the first resource set and a time domain position of the second resource set through configuration information of a search space, so that after the terminal device receives the configuration information of the search space, the terminal device may obtain the time domain position of the first resource set and the time domain position of the second resource set through the configuration information of the search space, and thus the terminal device may monitor the first control channel by using the first resource set and the second resource set to determine the first control channel sent by the network device.
Further, in some embodiments of the present application, the configuration information of the search space is used to indicate a time domain position of the first set of resources and a time domain position of the second set of resources, and includes:
the configuration information of the Search Space indicates a time domain position of a first Search Space (e.g., Search Space 0);
the time domain position of the Ts time domain resource in the first resource set is shifted by a fifth offset relative to the time domain position of the Tt time domain resource in the first search space, the time domain position of the Tr time domain resource in the second resource set is shifted by a sixth offset relative to the time domain position of the Te time domain resource in the first resource set, and Ts, Tt, Tr and Te are integers greater than 0; or the like, or, alternatively,
the time domain position of the Tv-th time domain resource in the first resource set is shifted from the time domain position of the Tw-th time domain resource in the first search space by a seventh offset amount, the time domain position of the Tx-th time domain resource in the second resource set is shifted from the time domain position of the Ty-th time domain resource in the first search space by an eighth offset amount, and Tv, Tw, Tx and Ty are integers greater than 0.
Specifically, the configuration information of the search space indicates a time domain position of the first search space, for example, the configuration information of the search space indicates a starting time domain position of the first search space, or the configuration information of the search space indicates a time domain position of any one resource in the first search space, or the configuration information of the search space indicates all time domain positions of the first search space, which is not limited herein. For example, the configuration information of the search space indicates a time domain position of the Tt time domain resource in the first search space, or the configuration information of the search space indicates a starting time domain position in the first search space, and the time domain position of the Tt time domain resource in the first search space is determined according to the starting time domain position in the first search space. Wherein the ttth time domain resource in the first search space may be any one time domain resource in the first search space.
And determining the time domain resources in the first resource set according to the time domain resources in the first search space. For example, the time domain position of the Ts-th time domain resource in the first resource set is shifted from the time domain position of the Tt-th time domain resource in the first search space by a fifth offset, where the fifth offset is a predetermined value or a value notified to the terminal device by the network device. The Ts-th time domain resource in the first set of resources may be any one of the first set of resources.
And the time domain resources in the second resource set and the time domain resources in the first resource set have offset, so that the time domain resources in the second resource set can be determined according to the time domain resources in the first resource set. For example, the time domain position of the Tr time domain resource in the second resource set is shifted from the time domain position of the Te time domain resource in the first resource set by a sixth offset, where the sixth offset is a predetermined value or a value notified to the terminal device by the network device. The Te time domain resource in the first set of resources may be any one of the resources in the first set of resources. The Tr time domain resource in the second set of resources may be any one of the second set of resources.
It is understood that Ts, Tt, Tr, and Te are integers greater than 0, and specific values of Ts, Tt, Tr, and Te are not limited. In addition, the fifth offset and the sixth offset may be pre-configured values or values that are signaled by the network device to the terminal device, and the determining manners of the fifth offset and the sixth offset may be the same or different, which is not limited herein.
Specifically, the configuration information of the search space indicates a time domain position of the first search space, for example, the configuration information of the search space indicates a starting time domain position of the first search space, or the configuration information of the search space indicates a time domain position of any one resource in the first search space, or the configuration information of the search space indicates all time domain positions of the first search space, which is not limited herein. For example, the configuration information of the search space indicates a time domain position of the Tw time domain resource in the first search space, or the configuration information of the search space indicates a starting time domain position in the first search space, and the time domain position of the Tw time domain resource in the first search space is determined according to the starting time domain position in the first search space. Wherein, the Tw-th time domain resource in the first search space may be any one time domain resource in the first search space.
And determining the time domain resources in the first resource set according to the time domain resources in the first search space. For example, the time domain position of the Tv-th time domain resource in the first resource set is shifted from the time domain position of the Tw-th time domain resource in the first search space by a seventh offset amount, where the seventh offset amount is a predetermined value or a value notified to the terminal device by the network device. The Tv-th time domain resource in the first set of resources may be any one of the first set of resources.
And determining the time domain resources in the second resource set according to the time domain resources in the first search space. For example, the time domain position of the Tx-th time domain resource in the second resource set is shifted from the time domain position of the Ty-th time domain resource in the first search space by an eighth offset amount, where the eighth offset amount is a predetermined value or a value notified to the terminal device by the network device. The Tx-th time domain resource in the second set of resources may be any one resource in the second set of resources.
It is understood that Tv, Tw, Tx, and Ty are integers greater than 0, and the specific values of Tv, Tw, Tx, and Ty are not limited. In addition, the seventh offset and the eighth offset may be pre-configured values or values that are signaled by the network device to the terminal device, and the determining manners of the fifth offset and the eighth offset may be the same or different, which is not limited herein.
In some embodiments of the present application, the number of time domain resource units comprised in the first set of resources is equal to the number of time domain resource units comprised in the first set of control resources.
The time domain resource unit is a resource unit of the control resource set in the time domain, for example, the time domain resource unit may be one of the following information: radio frame, subframe, symbol, time window, time slot. For example, the time domain resource unit may be a time slot or a time domain symbol, and the like, which is not limited herein, the number of the time domain resource units included in the first resource set is equal to the number of the time domain resource units included in the first control resource set, so that the network device and the terminal device may conveniently determine the number of the time domain resource units included in the first resource set, and the processing complexity of the network device and the terminal device is simplified.
It should be noted that, in some embodiments of the present application, a time domain starting position or an end position of a first resource set is preconfigured, and similarly, a time domain starting position or a time domain end position of a second resource set may be preconfigured.
In some embodiments of the present application, the number of time domain resource units included in the second set of resources is equal to the number of time domain resource units included in the first set of control resources.
The time domain resource units may be time slots or time domain symbols, and the like, which are not limited herein, and the number of the time domain resource units included in the second resource set is equal to the number of the time domain resource units included in the first control resource set, so that the network device and the terminal device can conveniently determine the number of the time domain resource units included in the second resource set, and the processing complexity of the network device and the terminal device is simplified.
The first communications device determines the time domain locations of the first set of resources and the second set of resources, for example as follows.
The start time unit or end time unit of the search space set is N1, and the start time unit or end time unit of the first resource set is N1+ K1. The start time unit or end time unit of the second set of resources is N1+ L1. K1 is a predetermined integer or a notified integer, and L1 is a predetermined integer or a notified integer.
For example, the control resource set includes 3 symbols in the time domain, the start symbol index N1 of the search space is 0, K1 is 3, and L1 is 3, then the start symbol index of the first resource set is N1+ K1 is 3, and the start symbol index of the second resource set is N1+ L1 is 3.
For example, the control resource set includes 3 symbols in the time domain, the start symbol index N1 of the search space is 0, K1 is 0, and L1 is 0, then the start symbol index of the first resource set is N1+ K1 is 0, and the start symbol index of the second resource set is N1+ L1 is 0.
802. The network device transmits a first control channel on resources of a candidate control channel set, wherein the resources of the candidate control channel set comprise resources in the first resource set and resources in a second resource set.
In the embodiment of the application, the network device sends configuration information for controlling the resource set to the terminal device. Then, the network device determines a candidate control channel set, wherein resources of the candidate control channel set comprise resources in the first resource set and resources in the second resource set. The network device may use resources in the first set of resources and resources in the second set of resources as resources of the set of candidate control channels, and the network device may transmit the first control channel using the resources in the first set of resources and the resources in the second set of resources. In this embodiment, the network device may send the first control channel to the terminal device using resources in two or more resource sets, so that the terminal device may listen to the first control channel on resources in the two or more resource sets.
812. The terminal device monitors a first control channel on resources of a candidate control channel set, wherein the resources of the candidate control channel set comprise resources in the first resource set and resources in a second resource set.
In this embodiment, the terminal device may determine the resource in the first resource set according to the configuration information of the first resource set, and may determine the resource in the second resource set according to the configuration information of the second resource set. Then, the terminal device determines a candidate control channel set, wherein resources of the candidate control channel set comprise resources in the first resource set and resources in the second resource set. The terminal device may use resources in the first set of resources and resources in the second set of resources as resources of the candidate control channel set, and the terminal device may listen to the first control channel using the resources in the first set of resources and the resources in the second set of resources. In this embodiment, the network device may send the first control channel to the terminal device using resources in two or more resource sets, so that the terminal device may listen to the first control channel on resources in the two or more resource sets.
As can be seen from the foregoing description of the communication method, the resources of the first type terminal device and the second type terminal device for blind detection of the control channel are different. The control channel scheduling data transmission for the first type of terminal device is sent on the first resource set and the second resource set, and the terminal device receives information on the first resource set and the second resource set in two time domain resources respectively. The first set of resources and the second set of resources are determined from the set of control resources. When the bandwidth capability of the first type terminal device is smaller than the bandwidth of the configured control resource set, the control channel sent by the network device can be received, and the flexibility of the configuration of the control resource set and the search space is not influenced.
In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal device, and interaction between the network device and the terminal device. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.
It should be noted that, for simplicity of description, the foregoing method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present embodiment is not limited by the described order of acts, as some steps may occur in other orders or concurrently depending on the embodiment. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required for the embodiments of the application.
To facilitate better implementation of the above-described aspects of the embodiments of the present application, the following also provides relevant means for implementing the above-described aspects.
Referring to fig. 9, a communication device 900 according to an embodiment of the present application is provided. The communication apparatus 900 may be a terminal device, an apparatus in the terminal device, or an apparatus capable of being used with the terminal device. Fig. 9 illustrates an example in which communication apparatus 900 is terminal device 900. The terminal device 900 may include: a transceiver module 901 and a processing module 902.
In one possible implementation:
a transceiver module, configured to receive downlink control information from a network device, where the downlink control information includes a first modulation and coding scheme MCS field;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type of terminal device when the value of the first MCS field is a first value; or, when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device.
For the introduction of the first MCS, the first value and the second value, reference may be made to the foregoing method embodiments, and details are not repeated here.
In one possible implementation:
a transceiver module, configured to receive downlink control information from a network device;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type of terminal device when the downlink control information is scrambled by a first scrambling sequence; or, when the downlink control information is scrambled by the second scrambling sequence, determining that the downlink control information is used for scheduling data transmission of the second type terminal device.
In some embodiments of the present application, the initialization parameter used to generate the first scrambling sequence is a non-zero value, and the initialization parameter used to generate the second scrambling sequence is equal to zero.
In one possible implementation:
a transceiver module, configured to receive downlink control information from a network device, where the downlink control information includes a first bit;
a processing module, configured to determine that the downlink control information is used for scheduling data transmission of a first type terminal device when the value of the first bit is a third value; or, when the value of the first bit is a fourth value, determining that the downlink control information is used for scheduling data transmission of the second type terminal device.
In one possible implementation:
a transceiver module, configured to receive configuration information of a control resource set from a network device, where the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set;
a processing module, configured to monitor a first control channel on resources of a candidate control channel set by using a transceiver module, where the resources of the candidate control channel set include resources in the first resource set and resources in the second resource set.
In some embodiments of the present application, the transceiver module is further configured to receive, from the network device, configuration information of a search space, where the configuration information of the search space is used to indicate a time domain location of the first set of resources and a time domain location of the second set of resources.
For the introduction of the control resource set, the first resource set, the second resource set, and the search space, reference may be made to the foregoing method embodiments, and details are not repeated here.
In some embodiments of the present application, the first MCS field includes 5 bits therein.
Referring to fig. 10, a communication device 1000 according to an embodiment of the present application is provided. The communication apparatus 1000 may be a network device, an apparatus in the network device, or an apparatus capable of being used with the network device. Fig. 10 illustrates an example in which the communication apparatus 1000 is a network device 1000. The network device 1000 may include: a transceiver module 1001 and a processing module 1002.
In one possible implementation:
a transceiver module, configured to send downlink control information to a terminal device, where the downlink control information includes a first modulation and coding scheme MCS field;
a processing module, configured to determine that a value of the first MCS field is a first value when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first MCS field is not the first value, or determining that the value of the first MCS field is a second value.
For the introduction of the first MCS, the first value and the second value, reference may be made to the foregoing method embodiments, and details are not repeated here.
In one possible implementation:
the receiving and sending module is used for sending downlink control information to the terminal equipment;
a processing module, configured to scramble the downlink control information using a first scrambling sequence when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, scrambling the downlink control information by using a second scrambling sequence.
In some embodiments of the present application, the initialization parameter used to generate the first scrambling sequence is a non-zero value, and the initialization parameter used to generate the second scrambling sequence is equal to zero.
In one possible implementation:
a transceiver module, configured to send downlink control information to a terminal device, where the downlink control information includes a first bit;
a processing module, configured to determine that a value of the first bit is a third value when the downlink control information is used to schedule data transmission of a first type of terminal device; or, when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first bit is a fourth value.
In one possible implementation:
the terminal equipment comprises a processing module, a transmitting module and a receiving module, wherein the processing module is used for sending configuration information of a control resource set to the terminal equipment through the transmitting module, and the configuration information of the control resource set is used for indicating the configuration information of a first resource set and the configuration information of a second resource set;
a processing module, configured to send a first control channel on a resource of a candidate control channel set through a transceiver module, where the resource of the candidate control channel set includes a resource in the first resource set and a resource in the second resource set.
In some embodiments of the present application, the processing module is further configured to send, to the terminal device through the transceiver module, configuration information of a search space, where the configuration information of the search space is used to indicate a time domain position of the first resource set and a time domain position of the second resource set.
For the introduction of the control resource set, the first resource set, the second resource set, and the search space, reference may be made to the foregoing method embodiments, and details are not repeated here.
The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
Fig. 11 shows an apparatus 1100 provided in this embodiment of the present application, configured to implement the functions of the terminal device in the foregoing method. The device may be a terminal device, or a device in the terminal device, or a device capable of being used in cooperation with the terminal device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 1100 includes at least one processor 1120, which is configured to implement the functions of the terminal device in the methods provided by the embodiments of the present application. For example, the processor 1120 may receive downlink control information, configuration information of a control resource set, and the like, and analyze the information, which is specifically referred to the detailed description in the method example and is not described herein again.
The apparatus 1100 may also include at least one memory 1130 for storing program instructions and/or data. A memory 1130 is coupled to the processor 1120. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1120 may operate in conjunction with the memory 1130. Processor 1120 may execute program instructions stored in memory 1130. At least one of the at least one memory may be included in the processor
The apparatus 1100 may further include a communication interface, which may be implemented in various ways, for example, a transceiver, an interface, a bus, a circuit, a pin, or an apparatus capable of performing both transceiving functions, which is illustrated in fig. 11 as a transceiver 1110, and the transceiver 1110 is used for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1100 can communicate with other devices. Illustratively, the other device may be a network device. The processor 1120 transmits and receives data using the transceiver 1110 and is configured to implement the method performed by the terminal device in the embodiments corresponding to fig. 1, fig. 3, fig. 4, and fig. 8.
The specific connection medium among the transceiver 1110, the processor 1120, and the memory 1130 is not limited in the embodiments of the present invention. In the embodiment of the present application, the memory 1130, the processor 1120 and the transceiver 1110 are connected by a bus 1140 in fig. 11, the bus is represented by a thick line in fig. 11, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.
Fig. 12 shows an apparatus 1200 provided in this embodiment of the present application, for implementing the functions of the network device in the foregoing method. The device may be a network device, or a device in a network device, or a device capable of being used in cooperation with a network device. Wherein the apparatus may be a system-on-a-chip. The apparatus 1200 includes at least one processor 1220 for implementing the functions of the network device in the methods provided by the embodiments of the present application. For example, the processor 1220 may generate and send information such as downlink control information, configuration information of a control resource set, and the like, which is specifically described in the detailed description of the method example and is not described herein again.
The apparatus 1200 may also include at least one memory 1230 for storing program instructions and/or data. Memory 1230 is coupled to processor 1220. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1220 may cooperate with the memory 1230. Processor 1220 may execute program instructions stored in memory 1230. At least one of the at least one memory may be included in the processor
The apparatus 1200 may further include a communication interface, which may be implemented in various ways, for example, the communication interface may be a transceiver, an interface, a bus, a circuit, or an apparatus capable of performing transceiving functions, the communication interface is illustrated as a transceiver 1212 in fig. 12, and the transceiver 1212 is used for communicating with other devices through a transmission medium, so that the apparatus in the apparatus 1200 may communicate with other devices. Illustratively, the other device may be a terminal device. The processor 1220 is configured to transmit and receive data using the transceiver 1212 and is configured to implement the method performed by the network device in the embodiments corresponding to fig. 1, 3,4, and 8.
The specific connection medium among the transceiver 1212, the processor 1220 and the memory 1230 is not limited in the embodiments of the present application. In fig. 12, the memory 1230, the processor 1220 and the transceiver 1212 are connected through a bus 1240, the bus is represented by a thick line in fig. 12, and the connection manner among other components is only schematically illustrated and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.
In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
The technical solutions provided in the embodiments of the present application may be wholly or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal device or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium, among others.
In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (47)
1. A method of communication, comprising:
receiving downlink control information from network equipment, wherein the downlink control information comprises a first Modulation Coding Scheme (MCS) field;
when the value of the first MCS field is a first value, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or the like, or, alternatively,
and when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device.
2. The method of claim 1, wherein the value of the first MCS field is a first value comprising:
the values of all bits of the first MCS field are 1.
3. The method of claim 1 or 2, wherein when the downlink control information is used for scheduling data transmission of a first type terminal device, the downlink control information further comprises a second MCS field, and the second MCS field is used for indicating the MCS of the data transmission of the first type terminal device.
4. The method of claim 1,
when the value of the first MCS field is a first value, determining that the downlink control information is used for scheduling data transmission of a first type of terminal device, including: when the value of the most significant bit of the first MCS field is 1, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or the like, or, alternatively,
when the value of the first MCS field is not the first value or when the value of the first MCS field is the second value, determining that the downlink control information is used for scheduling data transmission of a second type terminal device, including: and when the value of the most significant bit of the first MCS field is 0, determining that the downlink control information is used for scheduling data transmission of a second type terminal device.
5. The method of claim 4, wherein when the downlink control information is used for scheduling data transmission for a first type of terminal device, at least one bit in the first MCS field is used to indicate the MCS for the data transmission for the first type of terminal device, and wherein the highest order bit of the first MCS field is not included in the at least one bit.
6. The method of any of claims 1-5, wherein the first MCS field comprises 5 bits.
7. A method of communication, comprising:
sending downlink control information to terminal equipment, wherein the downlink control information comprises a first Modulation Coding Scheme (MCS) field;
when the downlink control information is used for scheduling data transmission of a first type of terminal equipment, determining the value of the first MCS field as a first value; or the like, or, alternatively,
and when the downlink control information is used for scheduling data transmission of second-type terminal equipment, determining that the value of the first MCS field is not the first value or determining that the value of the first MCS field is a second value.
8. The method of claim 7, wherein the value of the first MCS field is a first value comprising:
the values of all bits of the first MCS field are 1.
9. The method of claim 7 or 8, wherein when the downlink control information is used for scheduling data transmission of a first type terminal device, the downlink control information further comprises a second MCS field, and the second MCS field is used for indicating MCS of data transmission of the first type terminal device.
10. The method of claim 7,
when the downlink control information is used for scheduling data transmission of a first type of terminal equipment, determining that the value of the first MCS field is a first value includes: when the downlink control information is used for scheduling data transmission of a first type of terminal equipment, determining the value of the most significant bit of the first MCS field to be 1; or the like, or, alternatively,
when the downlink control information is used for scheduling data transmission of a second type terminal device, determining that the value of the first MCS field is not the first value or determining that the value of the first MCS field is a second value includes: and when the downlink control information is used for scheduling data transmission of second-type terminal equipment, determining that the value of the most significant bit of the first MCS field is 0.
11. The method of claim 10, wherein when the downlink control information is used for scheduling data transmission for a first type of terminal device, at least one bit in the first MCS field is used for indicating an MCS for the data transmission for the first type of terminal device, and wherein a most significant bit of the first MCS field is not included in the at least one bit.
12. The method of any of claims 7-11, wherein the first MCS field comprises 5 bits.
13. A method of communication, comprising:
receiving downlink control information from a network device;
when the downlink control information is scrambled by a first scrambling sequence, determining that the downlink control information is used for scheduling data transmission of a first type of terminal equipment; or the like, or, alternatively,
and when the downlink control information is scrambled by the second scrambling sequence, determining that the downlink control information is used for scheduling data transmission of the second type terminal equipment.
14. The method of claim 13, wherein an initialization parameter used to generate the first scrambling sequence is a non-zero value, and wherein an initialization parameter used to generate the second scrambling sequence is equal to zero.
15. A method of communication, comprising:
sending downlink control information to the terminal equipment;
when the downlink control information is used for scheduling data transmission of the first type terminal equipment, scrambling the downlink control information by using a first scrambling sequence; or the like, or, alternatively,
and when the downlink control information is used for scheduling data transmission of the second type terminal equipment, scrambling the downlink control information by using a second scrambling sequence.
16. The method of claim 15, wherein an initialization parameter used to generate the first scrambling sequence is a non-zero value, and wherein an initialization parameter used to generate the second scrambling sequence is equal to zero.
17. A method of communication, comprising:
receiving downlink control information from a network device, wherein the downlink control information comprises a first bit;
when the value of the first bit is a third value, determining that the downlink control information is used for scheduling data transmission of the first type terminal equipment; or the like, or, alternatively,
and when the value of the first bit is a fourth value, determining that the downlink control information is used for scheduling data transmission of the second type terminal equipment.
18. A method of communication, comprising:
sending downlink control information to terminal equipment, wherein the downlink control information comprises a first bit;
when the downlink control information is used for scheduling data transmission of the first type terminal equipment, determining the value of the first bit as a third value; or the like, or, alternatively,
and when the downlink control information is used for scheduling data transmission of second-type terminal equipment, determining the value of the first bit as a fourth value.
19. A method of communication, comprising:
receiving configuration information of a control resource set from a network device, wherein the configuration information of the control resource set is used for indicating configuration information of a first resource set and configuration information of a second resource set;
monitoring a first control channel on resources of a candidate set of control channels, wherein the resources of the candidate set of control channels include resources in the first set of resources and resources in the second set of resources.
20. The method of claim 19, wherein the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and comprises:
the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of an s-th frequency domain resource in the first resource set is offset from a frequency domain position of a t-th frequency domain resource in the first control resource set by a first offset, and a frequency domain position of an r-th frequency domain resource in the second resource set is offset from a frequency domain position of a p-th frequency domain resource in the first resource set by a second offset, wherein s, t, r, and p are integers greater than 0.
21. The method of claim 20, wherein the first offset is an integer multiple of N/M, where N is a number of frequency domain resource units included in the first set of control resources, M is a positive integer, and/or the division sign.
22. The method of claim 20 or 21, wherein the second offset is an integer multiple of N/E, where N is the number of frequency domain resource units included in the first set of control resources, E is a positive integer, and/or the dividing symbol.
23. The method of claim 19, wherein the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and comprises:
the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of a vth frequency domain resource in the first resource set is shifted from a frequency domain position of a w frequency domain resource in the first control resource set by a third offset amount, and a frequency domain position of an xth frequency domain resource in the second resource set is shifted from a frequency domain position of a yth frequency domain resource in the first control resource set by a fourth offset amount, wherein v, w, x, and y are integers greater than 0.
24. The method of claim 23, wherein the third offset is an integer multiple of N/F, where N is a number of frequency domain resource units included in the first set of control resources, F is a positive integer, and/or the dividing symbol.
25. The method of claim 23 or 24, wherein the fourth offset is an integer multiple of N/G, where N is the number of frequency domain resource units included in the first set of control resources, G is a positive integer, and/or the dividing symbol.
26. The method of any of claims 20-25, wherein the first set of resources comprises N/H frequency domain resource elements in the frequency domain, wherein N is the number of frequency domain resource elements included in the first set of control resources, H is a positive integer, and/or a dividing symbol.
27. The method of any of claims 20-26, wherein the second set of resources comprises N/U frequency domain resource units in frequency domain, wherein N is the number of frequency domain resource units included in the first set of control resources, U is a positive integer, and/or is a dividing symbol.
28. The method of any one of claims 19 to 27, further comprising:
receiving configuration information of a search space from the network device, the configuration information of the search space indicating a time domain location of the first set of resources and a time domain location of the second set of resources.
29. The method of claim 28, wherein the configuration information of the search space is used for indicating the time domain position of the first set of resources and the time domain position of the second set of resources, and comprises:
the configuration information of the search space indicates a time domain position of a first search space;
a time domain position of a Ts-th time domain resource in the first resource set is shifted from a time domain position of a Tt-th time domain resource in the first search space by a fifth offset amount, a time domain position of a Tr-th time domain resource in the second resource set is shifted from a time domain position of a Te-th time domain resource in the first resource set by a sixth offset amount, and the Ts, the Tt, the Tr, and the Te are integers greater than 0; or the like, or, alternatively,
the time domain position of the Tv-th time domain resource in the first resource set is shifted from the time domain position of the Tw-th time domain resource in the first search space by a seventh offset amount, the time domain position of the Tx-th time domain resource in the second resource set is shifted from the time domain position of the Ty-th time domain resource in the first search space by an eighth offset amount, and the Tv, the Tw, the Tx, and the Ty are integers greater than 0.
30. The method of any of claims 20 to 29, wherein the number of time domain resource units comprised in the first set of resources is equal to the number of time domain resource units comprised in the first set of control resources.
31. The method of any of claims 20 to 30, wherein the number of time domain resource units comprised in the second set of resources is equal to the number of time domain resource units comprised in the first set of control resources.
32. A method of communication, comprising:
sending configuration information of a control resource set to terminal equipment, wherein the configuration information of the control resource set is used for indicating the configuration information of a first resource set and the configuration information of a second resource set;
transmitting a first control channel on resources of a candidate control channel set, wherein the resources of the candidate control channel set comprise resources in the first resource set and resources in the second resource set.
33. The method of claim 32, wherein the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and comprises:
the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of an s-th frequency domain resource in the first resource set is offset from a frequency domain position of a t-th frequency domain resource in the first control resource set by a first offset, and a frequency domain position of an r-th frequency domain resource in the second resource set is offset from a frequency domain position of a p-th frequency domain resource in the first resource set by a second offset, wherein s, t, r, and p are integers greater than 0.
34. The method of claim 33, wherein the first offset is an integer multiple of N/M, where N is a number of frequency domain resource units included in the first set of control resources, M is a positive integer, and/or the division sign.
35. The method of claim 33 or 34, wherein the second offset is an integer multiple of N/E, where N is the number of frequency domain resource units included in the first set of control resources, E is a positive integer, and/or the dividing symbol.
36. The method of claim 32, wherein the configuration information of the control resource set is used to indicate configuration information of a first resource set and configuration information of a second resource set, and comprises:
the configuration information of the control resource set indicates a frequency domain resource position of a first control resource set, wherein a frequency domain position of a vth frequency domain resource in the first resource set is shifted from a frequency domain position of a w frequency domain resource in the first control resource set by a third offset amount, and a frequency domain position of an xth frequency domain resource in the second resource set is shifted from a frequency domain position of a yth frequency domain resource in the first control resource set by a fourth offset amount, wherein v, w, x, and y are integers greater than 0.
37. The method of claim 36, wherein the third offset is an integer multiple of N/F, where N is a number of frequency domain resource units included in the first set of control resources, F is a positive integer, and/or the dividing symbol.
38. The method of claim 36 or 37, wherein the fourth offset is an integer multiple of N/G, where N is the number of frequency domain resource units included in the first set of control resources, G is a positive integer, and/or the dividing symbol.
39. The method of any one of claims 33-38, wherein the first set of resources comprises N/H frequency domain resource elements in the frequency domain, wherein N is the number of frequency domain resource elements included in the first set of control resources, H is a positive integer, and/or a dividing symbol.
40. The method of any one of claims 33-39, wherein the second set of resources comprises N/U frequency domain resource units in the frequency domain, wherein N is the number of frequency domain resource units included in the first set of control resources, U is a positive integer, and/or a dividing symbol.
41. The method of any one of claims 32 to 40, further comprising:
and sending configuration information of a search space to the terminal equipment, wherein the configuration information of the search space is used for indicating the time domain position of the first resource set and the time domain position of the second resource set.
42. The method of claim 41, wherein the configuration information of the search space is used for indicating the time domain position of the first set of resources and the time domain position of the second set of resources, and comprises:
the configuration information of the search space indicates a time domain position of a first search space;
a time domain position of a Ts-th time domain resource in the first resource set is shifted from a time domain position of a Tt-th time domain resource in the first search space by a fifth offset amount, a time domain position of a Tr-th time domain resource in the second resource set is shifted from a time domain position of a Te-th time domain resource in the first resource set by a sixth offset amount, and the Ts, the Tt, the Tr, and the Te are integers greater than 0; or the like, or, alternatively,
the time domain position of the Tv-th time domain resource in the first resource set is shifted from the time domain position of the Tw-th time domain resource in the first search space by a seventh offset amount, the time domain position of the Tx-th time domain resource in the second resource set is shifted from the time domain position of the Ty-th time domain resource in the first search space by an eighth offset amount, and Tv, Tw, Tx, and Ty are integers greater than 0.
43. The method of any one of claims 33 to 42, wherein the number of time domain resource units comprised in the first set of resources is equal to the number of time domain resource units comprised in the first set of control resources.
44. The method of any of claims 33 to 43, wherein the number of time domain resource units comprised in the second set of resources is equal to the number of time domain resource units comprised in the first set of control resources.
45. A communication device arranged to implement the method of any one of claims 1 to 44.
46. A communications device comprising a processor and a memory, the memory coupled to the processor, the processor configured to perform the method of any of claims 1 to 44.
47. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 44.
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