CN117641389A

CN117641389A - Measurement method, device and system

Info

Publication number: CN117641389A
Application number: CN202210969400.8A
Authority: CN
Inventors: 张天虹; 刘云; 杨帆; 黄海宁; 李君瑶
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-03-01
Also published as: WO2024032580A1

Abstract

A method, device and system for measuring can be applied to unlicensed spectrum measurement, and a terminal device determines channel occupation condition by determining resources respectively occupied by different communication systems on unlicensed spectrum. The measuring method can be applied to the fields of V2X, internet of vehicles and the like, and the accuracy of unlicensed spectrum measurement is improved. Further, congestion control is achieved according to the measurement result, transmission congestion can be avoided, the resource utilization rate is improved, and the communication reliability is improved.

Description

Measurement method, device and system

Technical Field

The present application relates to the field of communications. And more particularly to a measurement method, apparatus and system.

Background

In a Side Link (SL) of a New Radio (NR) system, only a SL terminal device transmits in a resource pool or spectrum where the SL transmission is located, so that in R16 and R17, only the occupancy of resources by the terminal device of the present system (i.e., the SL terminal device) needs to be measured, for example, the channel state, for example, the channel occupancy, can be determined. But in the side-by-side unlicensed spectrum (sidelink on unlicensed spectrum, SL-U), there are other types of terminal devices on the unlicensed spectrum, such as a wireless fidelity (wireless fidelity, wi-Fi) terminal device, or a bluetooth terminal device, etc. (abbreviated as a heterogeneous system terminal device). At present, measurement of the state of unlicensed spectrum resources is not accurate enough, and the communication quality is affected.

Therefore, how to improve the accuracy of the measurement of the resource status in the unlicensed spectrum is a problem to be solved.

Disclosure of Invention

The utility model provides a measuring method, which can improve the accuracy of measuring the resource state in the unlicensed spectrum.

In a first aspect, embodiments of the present application provide a measurement method, which may be performed by a terminal device, or may also be performed by a chip or a circuit for a terminal device, which is not limited in this application. For convenience of description, an example will be described below in terms of execution by the terminal device.

The method may be applied to an unlicensed spectrum communication system including a first communication system, the method may include: determining the number of resource units occupied by the first communication system in a first measurement window, wherein the number of resource units occupied by the first communication system in the first measurement window is smaller than or equal to the number of resource units with Received Signal Strength Indication (RSSI) measured values larger than a first threshold value in the first measurement window; and determining the state of a channel of the first communication system in the first measurement window according to the number of the resource units occupied by the first communication system in the first measurement window and/or the number of the resource units with the RSSI measured value larger than a first threshold value in the first measurement window.

Optionally, the first communication system is a SL communication system, or the first communication system is a SL-U communication system.

Alternatively, the method may be: determining a first parameter, wherein the first parameter comprises the number of resource units occupied by a first communication system in a first measurement window and/or the number of resource units with RSSI measurement values larger than a first threshold in the first measurement window, and the number of resource units occupied by the first communication system in the first measurement window is smaller than or equal to the number of resource units with received signal strength indication RSSI measurement values larger than the first threshold in the first measurement window; a state of a channel of the first communication system within the first measurement window is determined based on the first parameter.

In the method, the terminal equipment determines the number of the resource units occupied by the first communication system in the measurement window, and determines the total number of the occupied resources (namely, the number of the resource units with the RSSI measured value larger than the first threshold value) on the unlicensed spectrum in the measurement window to determine the state of the channel of the first communication system, that is, the terminal equipment considers the condition that other communication systems occupy the channel when determining the state of the channel, can accurately calculate the state of the channel of the first communication system, and improves the accuracy of measuring the state of the resources in the unlicensed spectrum.

With reference to the first aspect, in some implementations of the first aspect, a channel busy state of the first communication system in the first measurement window is determined according to a ratio of a number of resource units occupied by the first communication system in the first measurement window to a number of resource units in the first measurement window.

It should be understood that the channel busy state may be characterized by a channel busy rate, or may be characterized by other parameters, which are not limited in this application, nor are names of parameters used to characterize the channel busy state.

With reference to the first aspect, in certain implementations of the first aspect, the channel busy state of the first communication system within the first measurement window is determined according to the following relationship:

Y＝A1÷[B-(A-A1)]，

wherein the Y represents a channel busy state of the first communication system in the first measurement window, the A1 represents a number of resource units occupied by the first communication system in the first measurement window, the a represents a number of resource units whose RSSI measurement value is greater than a first threshold in the first measurement window, and the B represents a number of resource units included in the first measurement window.

Where a-A1 is understood to mean resources other than the resources occupied by the first communication system in the resources occupied by the first measurement window, in other words, a-A1 is a resource occupied by another communication system, B- (a-A1) is understood to mean a resource that can be occupied by the first communication system in the first measurement window, where the resources that can be occupied include already occupied A1 and also include resources that are possibly occupied. Y may be understood as the ratio of resources occupied by the first communication system relative to the resources that can be used by the first communication system.

In the method, the number of resources occupied by other communication systems is eliminated, the duty ratio of the first communication system in the measurement window is calculated, and the accuracy of resource measurement is further improved.

With reference to the first aspect, in some implementations of the first aspect, a channel busy state of the second communication system in the first measurement window is determined according to a ratio of a number of resource units occupied by the second communication system in the first measurement window to a number of resource units in the first measurement window.

It should be appreciated that the second communication system may be a communication system other than the first communication system, i.e., a different system (or other communication system as well), on the unlicensed spectrum.

In this manner, the terminal device may also calculate the channel busy state of the second communication system in the first measurement window, so as to determine the respective channel busy states of different communication systems on the unlicensed spectrum, thereby further improving the accuracy of resource measurement.

Y＝A2÷[B-(A-A2)]，

wherein the Y represents a channel busy state of the first communication system in the first measurement window, the A2 represents a number of resource units occupied by the second communication system in the first measurement window, the a represents a number of resource units whose RSSI measurement value is greater than a first threshold in the first measurement window, and the B represents a number of resource units included in the first measurement window.

In the mode, a calculation mode of the resource duty ratio of the second communication system in the first measurement window is provided, and the accuracy of determining the channel state of the different systems is further improved.

It should be appreciated that the above-described approach may be applicable to resource measurements of unlicensed spectrum when a first communication system and a second communication system coexist, such as unlicensed spectrum in a dynamic access approach.

With reference to the first aspect, in certain implementations of the first aspect, determining a channel busy state of the first communication system in the first measurement window according to a ratio of the number of resource units in the first measurement window for which the RSSI measurement value is greater than a first threshold to the number of resource units in the first measurement window and a first offset;

or,

determining a channel busy status of the first communication system in the first measurement window based on a ratio of the number of resource units in the first measurement window for which the RSSI measurement value is greater than a first threshold to the number of resource units in the first measurement window and a first coefficient,

wherein the value of the first offset and/or the first coefficient is predefined, preconfigured or network configured.

The method can be suitable for the resource measurement of the unlicensed spectrum in the semi-static access mode, wherein only the first communication system exists on the unlicensed spectrum in the semi-static access mode, and the number of resource units with the RSSI measured value larger than the first threshold value in the first measurement window is the same as the number of the resource units occupied by the first communication system in the first measurement window in numerical value.

In the method, resources in idle time existing in a measurement window are considered, and the channel measurement result is adjusted through the offset value and the coefficient, so that the accuracy of resource measurement is further improved.

With reference to the first aspect, in certain implementations of the first aspect, a channel busy state of the first communication system in the first measurement window satisfies the following relationship:

Y＝(A1÷B)+offset，

or,

Y＝(A1÷B)*α，

wherein, the Y represents a channel busy state of the first communication system in the first measurement window, the A1 represents a number of resources occupied by the first communication system in the first measurement window, the B represents a number of resource units included in the first measurement window, the offset is the first offset, and the α is the first coefficient.

With reference to the first aspect, in certain implementations of the first aspect, in the first measurement window a channel busy state of the first communication system is greater than and/or equal to a second threshold, the method further includes at least one of:

a period reservation in the first communication system is enabled;

transmitting second SL information of the first communication system within a first COT determined based on parameters of the first SL information of the first communication system;

preemption in the first communication system is enabled;

The first SL information and the second SL information of the first communication system are transmitted within a first COT determined based on parameters corresponding to the first SL information of the first communication system.

It should be understood that the first SL information and the second SL information are different. The first SL information and the second SL information may be SL information of different terminal apparatuses, or SL information corresponding to different services of the same terminal apparatus, for example.

In this manner, the measurements within the measurement window may be used to determine whether to enable cycle reservation, COT sharing, and/or preemption, in other words, traffic transmission may be controlled based on the measurements. Because the accuracy of the measurement result is improved, the control of the service transmission can be more accurate, such as more accurate congestion control, and the user experience is improved.

With reference to the first aspect, in certain implementations of the first aspect, the first threshold is an energy detection threshold for channel access.

In a second aspect, embodiments of the present application provide a measurement method, which may be performed by a terminal device, or may also be performed by a chip or a circuit for a terminal device, which is not limited in this application. For convenience of description, an example will be described below in terms of execution by the terminal device. The measurement method may be applied to an unlicensed spectrum communication system including a first communication system. Alternatively, the first communication system may be a SL communication system.

The method may include: determining the number of resource units occupied by the first communication system in a second measurement window, wherein the number of resource units occupied by the first communication system in the second measurement window is smaller than or equal to the number of resource units with RSSI measured values larger than a second threshold value in the second measurement window; and determining the state of a channel of the first communication system in the third measurement window according to the number of the resource units occupied by the first communication system in the second measurement window, wherein the third measurement window comprises the second measurement window.

Alternatively, the method may be: determining the number of the resource units occupied by the first communication system in the second measurement window, and determining the state of a channel of the first communication system in a third measurement window according to the number of the resource units occupied by the first communication system in the second measurement window, wherein the third measurement window comprises the second measurement window.

Wherein the second measurement window may be part of a third measurement window. For example, the method may be applicable to measurement of the channel occupancy state, the third measurement window may include already occupied resources and authorized resources (i.e., resources to be used), and the second measurement window may be a measurement window corresponding to the already occupied resources. Illustratively, the third measurement window includes time slots [ n-a, n+b ] in the time domain and the second measurement window includes time slots [1, n-a ] in the time domain. The number of resource units for which the RSSI measurement value is greater than the second threshold value within the second measurement window includes the number of resources already occupied by the first communication system, and may also include the number of resources already occupied by other communication systems.

With reference to the second aspect, in certain implementations of the second aspect, the third measurement window further includes a fourth measurement window, where the third measurement window includes time slots [ n-a, n+b ] in the time domain, the second measurement window includes time slots [ n-a, n-1] in the time domain, the fourth measurement window includes time slots [ n, n+b ] in the time domain, and time slot n is a time slot that measures a state of the channel.

In the method, the accuracy of determining the occupied resources of the first communication system by the terminal equipment is improved by considering the resource occupation condition of the different systems, and the channel state in the measurement window is determined by the number of the occupied resources of the first communication system, so that the measurement accuracy is further improved.

With reference to the second aspect, in certain implementations of the second aspect, the channel occupancy state of the first communication system within the third measurement window is determined according to the following relationship:

Z＝(E+F)÷[D-(G-G1)],

wherein Z represents a channel occupancy state of the first communication system in the third measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units whose RSSI measurement value in the second measurement window is greater than a second threshold, and G1 represents a number of resource units occupied by the first communication system in the second measurement window.

Where the meaning of G-G1 may be understood as resources of the second measurement window occupied by resources other than the resources occupied by the first communication system, in other words, where G-G1 is a resource occupied by another communication system, D- (G-G1) may be understood as resources of the third measurement window occupied by the first communication system, where the resources may include occupied G1, authorized resources, unmeasured resources, or resources with a measurement value lower than the second threshold. Y may be understood as the ratio of resources occupied by the first communication system relative to the resources that can be used by the first communication system.

Z＝(E+F)÷(D-G+G1-δ)，

or,

Z＝(E+F)÷[D-γ×(G-G1)]

wherein Z represents a channel occupancy state of the first communication system in the third measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units whose RSSI measurement value is greater than the second threshold in the second measurement window, G1 represents a number of resource units occupied by the first communication system in the second measurement window, δ is an adjustment factor, and γ is a scale factor.

The delta may represent the number of resource units authorized by the second communication system in the fourth measurement window, and the delta may be calculated according to the number of resources other than the number of resource units authorized by the first communication system in the fourth measurement window. Alternatively, δ is a value preconfigured to the first terminal device or network configured to the first terminal device.

In the method, resources occupied by other communication systems in the second measurement window and authorized resources of other communication systems are eliminated, the duty ratio of the first communication system in the measurement window is calculated, and the accuracy of resource measurement is further improved.

With reference to the second aspect, in some implementations of the second aspect, the channel occupancy state of the first communication system is determined according to a ratio of a sum of a number of resource units transmitted by the first terminal device in the second measurement window and a number of authorized resource units in the fourth measurement window to a number of resource units in the third measurement window, and a second offset and/or a second coefficient, where a value of the second offset and/or the second coefficient is predefined, preconfigured or network configured.

The method can be suitable for the resource measurement of the unlicensed spectrum in the semi-static access mode, wherein the unlicensed spectrum in the semi-static access mode only has the first communication system, and the number of resource units with the RSSI measured value larger than the second threshold value in the second measurement window is the same as the number of the resource units occupied by the first communication system in the second measurement window in numerical value.

With reference to the second aspect, in some implementations of the second aspect, the amount of resources authorized by the first terminal device within the fourth measurement window is determined according to a service priority of the first terminal device or a CAPC.

With reference to the second aspect, in certain implementations of the second aspect, the transmission of the first SL information on a first time unit m is determined according to a first channel occupancy state, and a time unit N time units before the first time unit m is a time unit m-N for measuring the first channel occupancy state, where the first channel state satisfies at least one of the following:

∑ _i≥k CR(i)≤CR _Limit (k)+offset，∑ _i≥k CR(i)≤θ×CR _Limit (k)，∑ _i≥k CR(i)≤CR _Limit (k)，

the i is the priority value corresponding to the first SL information, the k is the priority value smaller than or equal to i, the values of i and k are integers from 1 to 8, the offset is the offset, the θ is the scale factor, CR (i) is the channel occupation state when the measured priority value is i, CR _Limit (k) And N is congestion control processing time, which is the channel occupancy state limit when the priority value is k.

The first channel occupancy state may be one example of a channel occupancy state, or the first channel occupancy state may be an occupancy state corresponding to a portion of channels corresponding to the channel occupancy state. The embodiments of the present application are not limited in this regard.

In the mode, whether the service information is transmitted on the initial time unit of the measurement window is determined through the measurement result and the channel state condition, the service information is not transmitted when the channel is occupied, and the service information can be transmitted when the channel has idle resources, so that the service transmission can be effectively regulated, excessive congestion is avoided, and the communication reliability is improved.

With reference to the second aspect, in certain implementations of the second aspect, the second SL information is transmitted within a first COT, which is an initial COT of the first terminal device,

the second channel occupancy state satisfies at least one of:

the i is the priority value corresponding to the second SL information, the k is the priority value smaller than or equal to i, the values of i and k are integers from 1 to 8, the offset is the offset, the θ is the scale factor, CR (i) is the channel occupation state when the measured priority value is i, CR _Limit (k) Is the channel occupancy state limit for priority values k.

The second channel occupancy state may be one example of a channel occupancy state, or the second channel occupancy state may be an occupancy state corresponding to a portion of channels corresponding to the channel occupancy state. The embodiments of the present application are not limited in this regard.

Optionally, a time unit N time units before the time unit m where the second SL information is located is a time unit m-N for measuring the channel occupancy state.

In this embodiment, whether or not to share the resource of the first terminal apparatus to the second terminal apparatus is determined by the measurement result and the channel state condition, and the resource is not shared when the channel of the first terminal apparatus is occupied, and the resource can be shared when the channel occupancy state of the first terminal apparatus satisfies the sharing condition, so that excessive traffic congestion can be avoided, the resource utilization rate can be improved, and the communication reliability can be improved.

With reference to the second aspect, in some implementations of the second aspect, the second threshold is an energy detection threshold for channel access.

With reference to the first aspect or the second aspect, in some implementations, the RSSI measurement value of the resource unit is determined according to a linear average of the sum of the RSSI received powers of U resource subunits, where U is a positive integer less than or equal to L, and L is the number of the resource subunits included in the resource unit.

With reference to the first aspect or the second aspect, in certain implementations, U is greater than or equal to a third threshold, or u≡l is greater than or equal to a fourth threshold, or L-U is less than or equal to a fifth threshold, and it is determined that the RSSI measurement value of the resource unit is greater than the first threshold or the second threshold, where U is the number of resource subunits in the resource unit that the RSSI measurement value is greater than the first threshold or the second threshold.

With reference to the first aspect or the second aspect, in some implementations, the resource unit includes a time domain unit and/or a frequency domain unit, where the time domain unit includes at least one of a perceived time slot, a symbol, a perceived time slot, and a channel occupation time, and the frequency domain unit includes at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, an RB set, a resource pool, a guard band, a resource block, and a resource unit RE.

With reference to the first aspect or the second aspect, in some implementations, the resource sub-unit includes a time domain unit and/or a frequency domain unit, where the time domain unit includes at least one of a sensing time slot, a symbol, a sensing time slot, and a channel occupation time, and the frequency domain unit includes at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, and an RE.

In a third aspect, a measurement apparatus is provided, the measurement apparatus comprising a transceiver module and a processing module, the processing module configured to determine a number of resource units occupied by the first communication system within a first measurement window, the number of resource units occupied by the first communication system within the first measurement window being less than or equal to a number of resource units within the first measurement window for which a received signal strength indication, RSSI, measurement value is greater than a first threshold, the processing module further configured to determine a state of a channel of the first communication system within the first measurement window based on the number of resource units occupied by the first communication system within the first measurement window, and/or the number of resource units within the first measurement window for which the RSSI measurement value is greater than the first threshold.

With reference to the third aspect, in some implementations of the third aspect, the processing module is specifically configured to determine a channel busy state of the first communication system in the first measurement window according to a ratio of a number of resource units occupied by the first communication system in the first measurement window to a number of resource units in the first measurement window.

With reference to the third aspect, in some implementations of the third aspect, the processing module is specifically configured to determine a channel busy state of the first communication system within the first measurement window according to the following relationship:

Y＝A1÷[B-(A-A1)]，

With reference to the third aspect, in some implementations of the third aspect, the processing module is specifically configured to determine a channel busy state of the second communication system in the first measurement window according to a ratio of a number of resource units occupied by the second communication system in the first measurement window to a number of resource units in the first measurement window.

Y＝A2÷[B-(A-A2)]，

With reference to the third aspect, in some implementations of the third aspect, the processing module is specifically configured to determine a channel busy state of the first communication system in the first measurement window according to a ratio of the number of resource units in the first measurement window where the RSSI measurement value is greater than a first threshold to the number of resource units in the first measurement window and a first offset;

or,

the processing module is specifically configured to determine a channel busy status of the first communication system in the first measurement window according to a first coefficient and a ratio of the number of resource units in the first measurement window to the number of resource units in the first measurement window, where the RSSI measurement value is greater than a first threshold,

With reference to the third aspect, in some implementations of the third aspect, a channel busy state of the first communication system in the first measurement window satisfies the following relationship:

Y＝(A1÷B)+offset，

or,

Y＝(A1÷B)*α，

With reference to the third aspect, in certain implementations of the third aspect, in the first measurement window, a channel busy state of the first communication system is greater than and/or equal to a second threshold, at least one of the following is performed:

the processing module is specifically configured to enable periodic reservations in the first communication system;

the transceiver module is specifically configured to transmit the second SL information of the first communication system within a first COT, where the first COT is determined according to a parameter of the first SL information of the first communication system;

the processing module is specifically configured to enable preemption in the first communication system;

the transceiver module is specifically configured to transmit the first SL information and the second SL information of the first communication system within a first COT, where the first COT is determined according to a parameter corresponding to the first SL information of the first communication system.

In a fourth aspect, a measurement device is provided, where the measurement device includes a processing module and a transceiver module, where the processing module is configured to determine a number of resource units occupied by the first communication system in a second measurement window, where the number of resource units occupied by the first communication system in the second measurement window is less than or equal to a number of resource units whose RSSI measurement value in the second measurement window is greater than a second threshold, and where the processing module is further configured to determine a state of a channel of the first communication system in the third measurement window according to the number of resource units occupied by the first communication system in the second measurement window, where the third measurement window includes the second measurement window.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the third measurement window further includes a fourth measurement window, wherein the third measurement window includes time slots [ n-a, n+b ] in the time domain, the second measurement window includes time slots [ n-a, n-1] in the time domain, the fourth measurement window includes time slots [ n, n+b ] in the time domain, and time slot n is a time slot that measures a state of the channel.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to determine a channel occupancy state of the first communication system within the third measurement window according to the following relationship:

Z＝(E+F)÷[D-(G-G1)]，

Z＝(E+F)÷(D-G+G1-δ)，

Or,

Z＝(E+F)÷[D-γ×(G-G1)]

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to determine a channel occupancy state of the first communication system according to a sum of a number of resource units transmitted by the first terminal device in the second measurement window and a number of authorized resource units in the fourth measurement window, a ratio of the number of resource units in the third measurement window, and a second offset and/or a second coefficient, where the value of the second offset and/or the second coefficient is predefined, preconfigured or network configured.

With reference to the fourth aspect, in some implementations of the fourth aspect, the amount of resources authorized by the first terminal device within the fourth measurement window is determined according to a service priority of the first terminal device or a CAPC.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to determine, according to a first channel occupancy state, to transmit first SL information on a first time unit m, where a time unit N time units before the first time unit m is a time unit m-N for measuring the first channel occupancy state, where the first channel state meets at least one of:

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to determine, according to a second channel occupancy state, to transmit second SL information within a first COT, where the second SL information belongs to SL information of a second terminal device, and the first COT is an initial COT of the first terminal device,

the second channel occupancy state satisfies at least one of:

the i is the firstPriority value corresponding to two SL information, k is a priority value smaller than or equal to i, the values of i and k are integers of 1 to 8, offset is offset, θ is a scale factor, CR (i) is channel occupancy state when the measured priority value is i, CR _Limit (k) Is the channel occupancy state limit for priority values k.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second threshold is an energy detection threshold for channel access.

With reference to the third aspect or the fourth aspect, in some implementations, the RSSI measurement value of the resource unit is determined according to a linear average of the sum of the RSSI received powers of U resource subunits, where U is a positive integer less than or equal to L, where L is the number of the resource subunits included in the resource unit.

With reference to the third aspect or the fourth aspect, in some implementations, U is greater than or equal to a third threshold, or u+.l is greater than or equal to a fourth threshold, and it is determined that the RSSI measurement value of the resource unit is greater than the first threshold or the second threshold, where U is the number of resource subunits in the resource unit that have the RSSI measurement value greater than the first threshold or the second threshold.

With reference to the third aspect or the fourth aspect, in some implementations, the resource unit includes a time domain unit and/or a frequency domain unit, where the time domain unit includes at least one of a sensing time slot, a symbol, a sensing time slot, and a channel occupation time, and the frequency domain unit includes at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, an RB set, a resource pool, a guard band, a resource block, and a resource unit RE.

With reference to the third aspect or the fourth aspect, in some implementations, the resource sub-unit includes a time domain unit and/or a frequency domain unit, where the time domain unit includes at least one of a sensing time slot, a symbol, a sensing time slot, and a channel occupation time, and the frequency domain unit includes at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, and an RE.

It should be understood that the third aspect and the fourth aspect are implementation manners on the device side corresponding to the first aspect and the second aspect, and descriptions of relevant explanations, supplements, possible implementation manners and beneficial effects of the first aspect and the second aspect are equally applicable to the third aspect and the fourth aspect, respectively, and are not repeated herein.

In a fifth aspect, embodiments of the present application provide a communication device, including an interface circuit for implementing the function of the transceiver module in the third aspect, and a processor for implementing the function of the processing module in the third aspect.

In a sixth aspect, embodiments of the present application provide a communications device, including an interface circuit for implementing the functions of the transceiver module in the fourth aspect, and a processor for implementing the functions of the processing module in the fourth aspect.

In a seventh aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a terminal device, the program code comprising instructions for performing the method of the first aspect or the second aspect, or any or all of the possible manners of the first aspect or the second aspect.

In an eighth aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a network device, the program code comprising instructions for performing the method of the first aspect or the second aspect, or any or all of the possible manners of the first aspect or the second aspect.

In a ninth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the first aspect, or any one of the possible ways of the first aspect, or all of the possible ways of the first aspect.

In a tenth aspect, there is provided a computer program product storing computer readable instructions which, when run on a computer, cause the computer to perform the method of the second aspect described above, or any or all of the possible ways of the second aspect.

An eleventh aspect provides a communication system comprising means having the functions of implementing the first aspect, or any of the possible ways of the first aspect, or all of the possible ways of the first aspect, and all of the possible designs, and means having the functions of the second aspect, or any of the possible ways of the second aspect, or all of the possible ways of the second aspect, and all of the possible designs.

A twelfth aspect provides a processor, coupled to a memory, for performing the method of the first aspect, or any or all of the possible ways of the first aspect.

In a thirteenth aspect, there is provided a processor, coupled to a memory, for performing the method of the second aspect, or any or all of the possible ways of the second aspect.

In a fourteenth aspect, a chip system is provided, the chip system comprising a processor, and may further comprise a memory for executing a computer program or instructions stored in the memory, such that the chip system implements the method of any of the foregoing first or second aspects, and any possible implementation of any of the foregoing aspects. The chip system may be formed of a chip or may include a chip and other discrete devices.

In a fifteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the first aspect, or any or all of the possible ways of the first aspect.

In a sixteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the second aspect described above, or any or all of the possible ways of the second aspect.

A seventeenth aspect provides a measurement system comprising at least one measurement device as claimed in the third aspect and/or at least one measurement device as claimed in the fourth aspect, the communication system being arranged to implement the above-described first or second aspect, or any one of the possible ways of the first or second aspect, or a method of all of the possible implementations of the first or second aspect.

Drawings

Fig. 1 shows a schematic architecture of a communication system suitable for use in embodiments of the present application.

Fig. 2 shows a schematic diagram of an interleaved resource.

Fig. 3 shows a schematic diagram of a listen-before-talk mechanism.

Fig. 4 shows a schematic diagram of yet another listen-before-talk mechanism.

Fig. 5 shows a resource diagram in a semi-static channel access mode.

Fig. 6 shows a schematic representation of a CBR measurement.

Fig. 7 shows a schematic diagram of a CR measurement.

Fig. 8 shows a schematic diagram of a measurement method according to an embodiment of the present application.

Fig. 9 shows a schematic diagram of a resource occupation situation according to an embodiment of the present application.

Fig. 10 shows a schematic diagram of yet another measurement method according to an embodiment of the present application.

Fig. 11 shows a schematic diagram of still another resource occupation situation according to an embodiment of the present application.

Fig. 12 shows a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 13 shows a schematic block diagram of yet another communication device provided by an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solutions provided in the embodiments of the present application may be applied to various communication systems, such as a 5G (fifth generation (5th generation,5G) or New Radio (NR) system, a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD) system, etc., the technical solutions provided in the present application may also be applied to future communication systems, such as a sixth generation mobile communication system.

In addition, the technical solution provided in the embodiments of the present application may be applied to a link between a network device and a terminal device, and may also be applied to a link between devices, for example, a device to device (D2D) link. The D2D link may also be referred to as a sidelink, which may also be referred to as a side link, a sidelink, etc. In the embodiment of the present application, the D2D link, or the side link, refers to a link established between devices of the same type, and the meanings of the links are the same. The same type of device may be a link between terminal devices, a link between network devices, a link between relay nodes, or the like, which is not limited in the embodiment of the present application. For the link between the terminal equipment and the terminal equipment, there is a D2D link defined by release (Rel) -12/13 of the third generation partnership project (3rd generation partnership project,3GPP), and also a internet of vehicles link defined by 3GPP for the internet of vehicles. It should be appreciated that V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) or V2X links of a vehicle to any entity, including Rel-14/15. V2X also includes Rel-16, which is currently under study by 3GPP, and subsequent releases of V2X links based on NR systems, and the like. V2V refers to communication between vehicles; V2P refers to vehicle-to-person (including pedestrians, cyclists, drivers, or passengers) communication; V2I refers to the communication of the vehicle with an infrastructure, such as a Road Side Unit (RSU) or a network device, and a further V2N may be included in the V2I, V2N refers to the communication of the vehicle with the network device. Among them, RSUs include two types: the terminal type RSU is in a non-moving state because the terminal type RSU is distributed at the roadside, and mobility does not need to be considered; the base station type RSU may provide timing synchronization and resource scheduling for vehicles with which it communicates.

Architecture diagrams of mobile communication systems applied in embodiments of the present application. As shown in fig. 1, fig. 1 is a schematic architecture diagram of a communication system 1000 to which an embodiment of the present application applies. As shown in fig. 1, the communication system comprises a radio access network 100, optionally, the communication system 1000 may further comprise a core network 200 and the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal (e.g., 120a-120j in fig. 1). The terminal is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminals and the radio access network device may be connected to each other by wired or wireless means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

It should be understood that, in the communication system of the present application, the information transmitting end may be a network device, or may be a terminal device, and the information receiving end may be a network device, or may be a terminal device, which is not limited in this application.

In the embodiments of the present application, the UE may be referred to as a terminal device, a terminal apparatus, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication apparatus, a user agent, or a user apparatus.

The terminal device may be a device that provides voice/data to a user, e.g., a handheld device with wireless connection, an in-vehicle device, etc. The terminal devices may include user equipment, sometimes referred to as terminals, access stations, UE stations, remote stations, wireless communication devices, or user equipment, among others. The terminal device is used for connecting people, objects, machines and the like, and can be widely used in various scenes, including but not limited to the following scenes: cellular communication, D2D, V X, machine-to-machine/machine-type communications, M2M/MTC), internet of things (internet of things, ioT), virtual Reality (VR), augmented reality (augmented reality, AR), industrial control (industrial control), unmanned driving (self driving), remote medical (remote media), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation, smart city (smart city), unmanned aerial vehicle, robotic, and other end devices. For example, the terminal device may be a mobile phone (mobile phone), a tablet pc (Pad), a computer with a wireless transceiver function, a VR terminal, an AR terminal, a wireless terminal in industrial control, an entire car, a wireless communication module in the entire car, an on-board T-box (Telematics BOX), a road side unit RSU, a wireless terminal in unmanned driving, a smart speaker in IoT network, a wireless terminal device in telemedicine, a wireless terminal device in smart grid, a wireless terminal device in transportation security, a wireless terminal device in smart city, a wireless terminal device in smart home, or the like, which is not limited in the embodiment of the present application.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in cooperation with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign measurement. In addition, in the embodiment of the application, the terminal device may also be a terminal device in an IoT system, where IoT is an important component of future information technology development, and the main technical feature is to connect the article with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for interconnecting the articles.

The various terminal devices described above, if located on a vehicle (e.g., placed in a vehicle or installed in a vehicle), may be considered as in-vehicle terminal devices, also referred to as in-vehicle units (OBUs), for example. The terminal device of the present application may also be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in a vehicle as one or more components or units, and the vehicle may implement the method of the present application through the in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit.

It should be appreciated that the network device in the wireless communication system may be a device capable of communicating with the terminal device, which may also be referred to as an access network device or a radio access network device, e.g. the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (radio access network, RAN) node (or device) that accesses the terminal device to the wireless network. The base station may broadly cover or replace various names in the following, such as: a node B (NodeB), an evolved NodeB (eNB), a next generation NodeB (gNB), a relay station, an access point, a transmission point (transmitting and receiving point, TRP), a transmission point (transmitting point, TP), a master eNodeB (MeNB), a secondary eNodeB (SeNB), a multi-mode radio (multi standard radio, MSR) node, a home base station, a network controller, an access node, a radio node, an Access Point (AP), a transmission node, a transceiver node, a baseband unit (BBU), a radio remote unit (remote radio unit, RRU), an active antenna unit (active antenna unit, AAU), a radio head (remote radio head, RRH), a Central Unit (CU), a Distributed Unit (DU), a positioning node, and the like. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip for placement within the aforementioned device or apparatus. The base station may be a mobile switching center, a device that performs a base station function in D2D, V2X, M M communication, a network side device in a 6G network, a device that performs a base station function in a future communication system, or the like. The base stations may support networks of the same or different access technologies. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device.

In the embodiments of the present application, the functions of the base station may be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in the application scenarios of smart power grids, industrial control, intelligent transportation, smart cities and the like. The functions of the terminal may be performed by a module (e.g., a chip or a modem) in the terminal, or by a device including the functions of the terminal.

For ease of understanding the present application, a simple description of the random access procedure and related concepts is provided.

1. The resource: which can be understood as time-frequency resources. According to the Rel-16/Rel-17NR protocol, the scheduling granularity of the PSCCH/PSSCH is that the resource unit in the time domain is one time slot, and the resource unit in the frequency domain is that of one or more continuous sub-channels. The transmitting terminal apparatus may transmit sidelink information on the resource, and may carry signals such as a physical sidelink control channel (physical sidelink control channel, PSCCH), a physical sidelink shared channel (physical sidelink shared channel, PSSCH), a physical sidelink feedback channel (physical sidelink feedback channel, PSFCH), and a demodulation reference signal (demodulation reference signal, DMRS), a channel state information reference signal (channel state information reference signal, CSI-RS), a PT-RS (phase-tracking reference signal ), a sidelink synchronization signal, and a PBCH block (sidelink synchronization signal and PBCH block, S-SSB), a cyclic prefix extension (Cyclic Prefix Extension or CP extension, CPE), etc. on one resource. The PSCCH carries a first-order SCI, the PSSCH carries a second-order SCI and/or data, and the PSFCH carries feedback information. The sidestream information (or SL information) comprises one or more of PSCCH, PSSCH, PSFCH, DM-RS, CSI-RS, PT-RS, synchronization and CPE.

PSCCH: the PSCCH carries a first order SCI. For ease of description, PSCCH and SCI are meant to be the same unless otherwise indicated. In the time domain, the PSCCH occupies two or three OFDM symbols starting from the second sidelink symbol; in the frequency domain, the PRBs carrying the PSCCH start from the lowest PRB of the lowest subchannel of the associated PSCCH, and the number of PRBs occupied by the PSCCH is within the subband range of one PSCCH. The PSCCH consists of {10,12,15,20,25} RBs, with specific values indicated by RRC signaling or preconfigured.

PSSCH: the PSSCH carries at least 2 of a second order SCI, a MAC CE, and data. SCI may refer to first order SCI and/or second order SCI. For convenience of description, SCI refers to any one of first-order SCI, second-order SCI, first-order SCI, and second-order SCI when distinction is not made. In the time domain, on the resources without PSFCH, there are 12 symbols for carrying the PSSCH; on the resources with PSFCH, there are 9 symbols for carrying the PSSCH. In the frequency domain, consecutive LsubCh sub-channels are occupied. In addition, in one slot, the first OFDM symbol replicates information transmitted on the second symbol for automatic gain control (Automatic Gain Control, AGC).

PSFCH: the PSFCH carries feedback information. On resources with PSFCH, the penultimate and third OFDM symbols carry PSFCH. The signal on the third last symbol is a repetition of the signal on the second last symbol so that the receiving terminal device makes AGC adjustments.

GAP symbol: in addition, the terminal device may receive and transmit the PSSCH respectively in two consecutive slots, or the terminal device may receive and transmit the PSSCH and the PSFCH respectively in the same slot. Therefore, an additional symbol is required for the transmit/receive conversion of the terminal apparatus after the PSSCH and after the PSFCH symbol.

2. Time domain resource unit, frequency domain resource unit:

the time domain resource unit includes symbols (symbols), slots (slots), mini slots (mini-slots), partial slots (partial slots), subframes (sub-frames), radio frames (frames), sensing slots (sensing slots), and the like.

The frequency domain resource unit includes Resource Elements (REs), resource Blocks (RBs), RB sets (RBs sets), subchannels (sub-channels), resource pools (resource pools), bandwidth parts (BWP), carriers (carriers), channels (interlaces), and the like.

For ease of description, the resources for transmitting the PSCCH/PSSCH are described herein with time domain resources as slots, frequency domain resources as subchannels, or interlaces.

3. Unlicensed band (unlicensed spectrum): also called shared Spectrum (Spectrum), in a wireless communication system, the Spectrum may be divided into licensed bands and unlicensed bands according to the frequency bands used. In the licensed band, users use spectrum resources based on the scheduling of the central node. In unlicensed bands, the transmitting node needs to use spectrum resources in a contention manner, specifically, contend for the channel by listen-before-talk (LBT) manner. In 5G NR systems, NR protocol techniques in unlicensed bands are collectively referred to as NR-U, through which further improvement of communication performance is desired. SL communication in unlicensed bands is an important evolution direction, and corresponding protocol technologies may be collectively called SL-U. UEs operating through SL-U need to coexist with nearby Wi-Fi and the like based on LBT mechanisms. The LBT mechanism is an essential feature of unlicensed bands because of regulatory requirements for use of unlicensed bands in various regions of the world. The UE working in various forms of different communication protocols can only use the unlicensed frequency band if the rule is satisfied, and further can use the spectrum resources relatively fairly and efficiently. SL communication over unlicensed spectrum is referred to as SL-U. In addition, there may be communication between at least any one terminal such as Wi-Fi terminal, bluetooth terminal, and Zigbee terminal in the unlicensed spectrum, and these terminals may be simply referred to as heterogeneous terminal for SL terminal.

4. Occupied channel bandwidth (occupied channel bandwidth, OCB) requirements: the nominal channel bandwidth is the widest frequency band allocated to a single channel, including the guard band. OCB is the bandwidth that contains 99% of the signal power. The nominal channel bandwidth of a single operating channel is 20MHz. The occupied channel bandwidth should be between 80% and 100% of the nominal channel bandwidth. For terminal devices with multiple transmit chains, each transmit chain should meet this requirement. The occupied channel bandwidth may vary with time/payload. During the channel occupancy time (channel occupancy time, COT), the terminal device can temporarily transmit at less than 80% of its nominal channel bandwidth, with a minimum transmission bandwidth of 2MHz.

The staggered transmission is to meet the OCB requirement. Take a 20MHz bandwidth, 30kHz SCS as an example. There are 51 RBs of transmission bandwidth (as shown in fig. 2). If one subchannel consists of 10 RBs, there are 5 subchannels (remaining 1 RB is idle). If the terminal device transmits on one sub-channel, the occupied bandwidth is about 4MHz, and the OCB requirement of "occupied channel bandwidth should be between 80% and 100% of the nominal channel bandwidth" is not satisfied. If transmitted in an interleaved form, such as in an interleaved transmission with index 0, the bandwidth occupies about 20MHz, i.e., 100% of the nominal bandwidth; if transmitted in an interlace with index 1, the bandwidth is about 18MHz, i.e. about 46/51≡90%. The requirement of OCB can be satisfied.

5. Interleaving (also known as interleaving resource blocks (interlaced resource blocks))

The protocol defines a plurality of interleaved resource blocks (Multiple interlaces of resource blocks), hereinafter referred to as interlaces. Interlace M is composed of common resource blocks (common resource block, CRB) { M, m+m,2m+m, 3m+m. Where M is the number of interlaces and there is M ε {0, 1..M-1 }. Optionally, the value of M is related to SCS. For example, when μ=0 (i.e., the subcarrier spacing is 15 kHz), M takes a value of 10. For another example, when μ=1 (i.e., the subcarrier spacing is 30 kHz), M takes a value of 5.

CRBThe relationship with interleaved resource blocks, BWPi and interlace m satisfies: /> Wherein->The common resource block indicating the start of BWP is the number of CBRs relative to the common resource block 0. When there is no risk of confusion, the index μmay be omitted. The terminal device expects the number of common resource blocks in the interlace contained in BWP i to be not less than 10. For convenience of description, the common resource block CRB may be understood as RB.

The resource allocation pattern includes two patterns, continuous and staggered. The interlacing can also be called interlacing, progressive and comb teeth. The 1 interlace includes N discontinuous RBs, and the transmission bandwidth includes M interlaces. Alternatively, the intervals between RBs within an interlace may be the same or different. For example, within 1 interlace, the interval of RBs may be M RBs. For example, as shown in fig. 2, the horizontal axis represents the frequency domain, the unit is RB, the vertical axis represents the time domain, and the unit is symbol. Within the 20MHz frequency bandwidth, there are 51 Resource Blocks (RBs), i.e., 51 lattices, at 30KHz subcarrier spacing. Of the 51 resource blocks, 10 or 11 equally spaced resource blocks form one interlace, totaling 5 interlaces. 11 RBs numbered 0 correspond to interlace 0, and 10 RBs numbered 1, 2, 3, and 4 correspond to interlace 1, interlace 2, interlace 3, and interlace 4, respectively. In addition, the RBs may also be referred to as physical resource blocks (physical resource block, PRBs).

Taking the 20MHz transmission bandwidth as an example, the number of interlaces M and the number of PRBs (i.e., RBs) N in the interlaces are listed in table 1. The combination of at least one interlace number M and RB number N in the interlace may be determined according to a configuration or a pre-configuration.

Table 1 combinations of number M of interlaces and number N of PRBs of interlaces under different SCS when 20mhz transmission bandwidth

Herein, "transmitting, transmitting or receiving PSCCH in an interleaved manner" may also be understood as "mapping PSCCH in an interleaved manner" or "decoding PSCCH in an interleaved manner" and "transmitting, transmitting or receiving PSSCH in an interleaved manner" may also be understood as "mapping PSSCH in an interleaved manner" or "decoding PSSCH in an interleaved manner".

6. And (3) a resource pool: NR SL communication is based on resource pool (resource pool). By resource pool is meant a block of time-frequency resources dedicated to SL communication. The resource pool contains contiguous frequency domain resources. The time domain resources contained in the resource pool can be continuous or discontinuous. The different resource pools are distinguished by RRC signaling. The terminal device receives in the reception resource pool and transmits in the transmission resource pool. If the resource pools have the same resource pool index, the time-frequency resources of the resource pools may be considered to be fully overlapping.

In SL-U, since the frequency band is shared by various types of terminal apparatuses, for example, the SL terminal apparatus and Wi-Fi terminal apparatus, bluetooth terminal apparatus transmit on the same frequency band. Therefore, there is not necessarily a notion of a SL dedicated resource pool. The SL resource pool can also be understood as: a set of resources that can be used for SL transmissions. In this embodiment, the resource pool may also be referred to as RB set, channel, working channel (Operating channel), nominal channel (Nominal Channel Bandwidth) bandwidth (bandwidth). Wherein the meanings of the channel and RB sets may be interchanged. I.e. resource pool, channel, bandwidth, RB set are all used to represent the set of resources that can be used for SL transmission.

The bandwidth of the resource pool may be at least one of {5, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100} mhz.

The relationship of the resource pool to the channel is explained below. The bandwidth of the resource pool is c×20mhz, and C is a positive integer, such as c= {1,2,3,4,5}. There is at least one channel in the resource pool. For example, the resource pool includes one channel, the channel bandwidth is 20MHz, and the resource pool bandwidth is 20MHz. For another example, the resource pool includes 2 channels, the channel bandwidth is 20MHz, and the resource pool bandwidth is 40MHz. For another example, the resource pool includes 5 channels, the channel bandwidth is 20MHz, and the resource pool bandwidth is 100MHz.

Similarly, the relation of the resource pool and the RB set is explained. The frequency domain bandwidth of the RB set is 20MHz. The bandwidth of the resource pool is c×20Mhz or c×20+c2mhz, and C is a positive integer, such as c= {1,2,3,4,5}. For example, the bandwidth of the resource pool is 20MHz, and the resource pool contains 1 RB set. For another example, the bandwidth of the resource pool is 50MHz, and the resource pool contains 2 RB sets, which may or may not be adjacent in the frequency domain.

The terminal device may transmit PSCCH and/or PSSCH on adjacent D RB sets or may transmit PSCCH and/or PSSCH on 1 RB set in the resource pool. The terminal device is exemplified by transmitting PSCCH on a interlaces and PSSCH on B interlaces. For the terminal device to transmit on adjacent D RB sets, the terminal device transmits PSCCH on a interlaces on the RB set with the smallest RB set index; the terminal device transmits the PSSCH on D RB sets, in total, on B interlaces. For example, a=1, b=4, d=2, and the RB set index is 0 and 1, respectively, the terminal device transmits on the RB set index of 0.

Lbt: LBT is a channel access rule. The UE needs to monitor whether the channel is idle or not before accessing the channel and starting to send data, and if the channel is idle for a certain time, the UE can occupy the channel; if the channel is not idle, the UE needs to wait for the channel to resume to idle before occupying the channel.

Energy-based detection and signal type detection can be generally used to determine the channel state, for example, NR-U uses energy detection, and WiFi uses two combined detection methods. A detection threshold (energy detection threshold) needs to be set based on the detection of energy, and when the detected energy exceeds the detection threshold, it is determined that the channel is busy, and access to the channel is not allowed. When the detected energy is below the detection threshold, access to the channel is allowed if after a period of time. Depending on the national and regional regulatory requirements for the use of unlicensed bands, for example, the 5GHz band, a channel may refer to a 20MHz bandwidth. The channel can be occupied by accessing a channel of 20MHz, and the requirement of at least minimum OCB is required to be met, and the minimum OCB is at least 80% of the normal bandwidth, and the normal bandwidth is 20MHz as an example, namely the UE at least needs to occupy 16MHz bandwidth to occupy the 20MHz channel. It should be understood that the bandwidth of one channel may be other values, 20MHz being just an example and not a limitation.

There are various types of LBT. The type of LBT may also be referred to as a type of channel access. The following mainly describes two types:

first type LBT: the communication device needs to perform random backoff (random backoff) before accessing the channel and transmitting data. For example, the terminal device may perform a continuous detection (refer to as T) _d ) The first time the channel is sensed to be idle, a data transmission is initiated after the counter N is decremented to zero on the detection slot period (sensing slot duration). Immediately following T _d After which is m _p Each successive listening slot period (denoted as T _sl ). Specifically, the terminal device may access the channel according to the following steps:

step 1. Set n=n _init Wherein N is _init To be uniformly distributed between 0 and CW _p Random number in between, step 2 is performed, wherein CWp can be a contention window (contentionwindow when priority is powforagivenpriority class)；

Step 2, if N >0, the network device or the terminal device selects a down counter, and N=N-1 is taken;

step 3, if the channel during the interception time slot is idle, the step 4 is shifted to;

otherwise, go to step 5;

step 4, stopping if n=0;

otherwise, step 2 is performed.

Step 5. Listening to the channel until at another T _d In detecting that the channel is busy or detecting another T _d All listening slots in the network are detected as idle channels;

step 6. If at another T _d Detecting that the interception time slots in the channel are idle, and executing the step 4;

otherwise, step 5 is performed.

Wherein CW is _min,p ≤CW _p ≤CW _max,p ，CW _min,p To minimum value of contention window when priority is p, CW _max,p The maximum value of the contention window when the priority is p.

Wherein whether the channel is idle or busy is determined according to a channel detection threshold. For example, the received power (detected power) is greater than the energy detection threshold X _Thresh The channel is busy. For another example, the received power (detected power) is less than the energy detection threshold X _Thresh The channel is idle.

Selecting CW before the above step 1 _min,p And CW _max,p ，m _p 、CW _min,p And CW _max,p Is determined based on a channel access priority level p associated with the network device or terminal device transmission, as shown in table 2 or table 3:

table 2 channel access priority and CW _p Relation table of (2)

Table 3 channel access priority and CW _p Relation table of (2)

T in Table 2 or Table 3 _{m cot,p} For a maximum duration (maximum channel occupancy time for a given priority class) of channel occupancy when the priority is p, the channel occupancy time (channel occupancy time, COT) of a network device or terminal device for transmission on the channel does not exceed T _{m cot,p} In other words, COT refers to the time that a communication device is allowed to occupy a channel after successfully accessing the channel, and in other words, the communication device can preempt the usage of the channel for a period of time after completing the LBT procedure. The channel access procedure is performed based on the channel access priority level p associated with the network device or terminal device transmission, with a smaller priority level value in table 1 indicating a higher priority, e.g. priority 1 being the highest priority.

Network device or terminal device maintains contention window value CW _p And before step 1, the CW is adjusted according to the following steps _p Is a value of (1):

for each priority in the table, CW corresponding to the priority is set _p ＝CW _min，p 。

In the feedback HARQ-ACK value corresponding to the data transmitted in the reference subframe k, if at least 80% of the data is negatively acknowledged (negative acknowledgment, NACK), the network device or terminal device will have CW corresponding to each priority _p The value is increased to the next higher allowable value, which is used in step 2; otherwise, step 1 is performed. Wherein the reference subframe k is the initial subframe of the last data transmission of the network device or the terminal device on the channel.

An example of the above-mentioned first type LBT is shown in fig. 3, where N is 6 as an example, the terminal device determines the channel at the first T by listening _d Is always idle within the duration of (1) and is in the first T _sl Decrementing N from 6 to 5 in the second T _sl N is decremented from 5 to 4. After that, the terminal device detects that the channel state is busy and waits for the channelState idle and last T _d After the duration of (3), at the third T _sl N is decremented to 3. After that, the terminal device again detects that the channel is busy, and waits again for the channel state to be idle for T _d After the duration of (4), at the fourth T _sl N is decremented to 2, the fifth T _sl N is decremented to 1 at a sixth T _sl Decrementing N to 0. Then, the terminal device accesses the channel and transmits data in the COT.

The second type of LBT is LBT without random back-off, and is divided into three cases:

case a: the communication device may transmit data without performing random back-off after listening that the channel is in an idle state for a period of 16us.

Case B: the communication device may transmit data without performing random backoff after sensing that the channel is in an idle state for a period of 25 us. Case B corresponds to a plurality of switching intervals (switching gap) with respect to case a. For example, the communication device transmits immediately after a transition interval from the reception state to the transmission state in the COT, and the time of the transition interval may be not more than 16us. The specific transition time may be preset or configured by the base station or may be related to the hardware capabilities of the communication device.

Case C: the communication device may transmit without channel sounding, with a transmission time of 584us at most.

As shown in fig. 4, the communication device listens to the channel and determines that the channel is idle for a time interval (gap), and then may access the channel at the end of the time interval.

The channel access procedure may also be divided into dynamic (dynamic) channel access and semi-static (semi-static) channel access, and the terminal apparatus determines to employ a dynamic or semi-static channel access method based on configuration or pre-configuration. Wherein the dynamic channel access may be the first type LBT and the second type LBT described above. Dynamic channel access is suitable for the scene that SL terminals and heterogeneous system terminals transmit on unlicensed spectrum.

Semi-static channel access as shown in fig. 5, the base station or terminal device uses T in every two consecutive radio frames _x The channel is occupied for a period. i.T occupying radio frames with even index at the beginning time point _x At or i.T _x At +offset. The duration of the occupied channel is at most 0.95T _x . In period T _x Last max (0.05T) _x 100 us) duration is the idle duration of the cycle. The base station or the terminal apparatus does not transmit in the idle time. Wherein T is _x Is configured or preconfigured, for example, is at least any one of {1,2,2.5,4,5, 10} ms;semi-static channel access is suitable for use in scenarios where only SL terminals transmit over unlicensed spectrum.

Semi-static channel access may also be referred to as frame structure based device (frame based equipment, FBE) channel access. Or can also be understood as: the FBE accesses the channel through a semi-static access mode. Dynamic channel access may also be referred to as load-based equipment (load based equipment, LBE) channel access. Or can also be understood as: LBE accesses the channel through dynamic access mode.

8. Channel occupancy and channel occupancy time

Channel occupancy (channel occupancy, CO) refers to the transmission of a terminal device on one or more channels after performing a channel access procedure.

The terminal device performs Type1 channel access and then occupies channel transmission for a continuous period of time, which is called channel occupation time (channel occupancy time, COT). The frequency domain unit of the COT is a channel, and the time domain unit is ms or a time slot. In this patent, COT may be a time concept, i.e., the time of SL transmission; but also a resource concept, i.e. the time-frequency resource occupied by SL transmissions. In this application, COT and CO are the same concept unless further distinction is made. The terminal device may transmit on multiple channels, either adjacent or not. In this application, the transmission of the terminal device in a plurality of channels can be understood as: the transmission of the terminal device occupies 1 COT, and the COT occupies a plurality of channels in the frequency domain; alternatively, the transmission of the terminal device occupies a plurality of COTs, each of which occupies 1 channel in the frequency domain.

The network device or the terminal device transmits in the COT after success based on the first type LBT access channel. This COT may be referred to as the initial COT of the network device or the terminal device. The first type of LBT is performed with different priorities p, which may also be referred to as a priority p-based initial COT. Wherein, the initial is initiated, initial, initialization or initial. The initial COT may also be translated into a created COT.

The COT may be shared for transmission (COT sharing) between terminal apparatuses. The terminal device of the initial COT may share the COT to other terminal devices, i.e., for SL transmission of the other terminal devices. The terminal device of the initial COT and the terminal device of the shared COT occupy the channel for a period of continuous time to transmit COT sharing, and the corresponding conditions need to be met, for example, the terminal device of the initial COT is a receiving terminal device or a transmitting terminal device of the shared COT, and for example, the terminal device of the initial COT and the terminal device of the shared COT are members in the same group.

The transmission of the terminal device cannot exceed the limit (maximum channel occupancy time, MCOT) of the maximum channel occupation time, denoted T _{m cot,p} . The value of the access priority p is different for different channels as shown in table 2 or table 3. For 1 terminal device to access channel and transmit in COT, the transmission time does not exceed the maximum channel occupation time T _{m cot,p} . For a plurality of terminal devices to transmit within the COT, the transmission time of the terminal device of the initial COT and the terminal device of the shared COT does not exceed the maximum channel occupation time T _{m cot,p} . P is a channel access priority (channel access priority class, CAPC) of the terminal device of the initial COT; alternatively, P is a cap with the smallest cap value among terminal devices transmitting COT.

9. Priority level: the traffic priority of the terminal apparatus B is specifically the transmission priority of the terminal apparatus B (transmission priority). Since the terminal apparatus B may transmit a plurality of services at the same time, the priorities of the plurality of services may be different. Traffic priority, which may also be referred to as L1 priority (L1 priority), physical layer priority, priority carried in SCI of first order, priority corresponding to PSSCH associated with SCI, transmission priority, priority of transmitting PSSCH, priority for resource selection, priority of logical channel, or highest level priority of logical channel.

Wherein the priority levels have some correspondence with the priority values, e.g. a higher priority level corresponds to a lower priority value or a lower priority level corresponds to a lower priority value. When a lower priority value represents a higher level of priority, the priority value may range from an integer of 1 to 8 or an integer of 0 to 7. If the range of the priority value is 1-8, the priority value is 1, which represents the highest priority. When a lower priority value represents a lower level of priority, then the value of priority is 1 representing the lowest level of priority.

In unlicensed spectrum, there is the concept of CAPC. The CAPC may also translate into a channel access priority class. The cap correlates the importance of the SL information for the first type of LBT. For example, CAPC is a priority p in the first type of LBT. Alternatively, the CAPC terminal may also be configured to determine whether the second SL information is transmitted within the initial COT of the CAPC associated with the first SL information.

Where the caps level has some correspondence with the caps values, e.g., a higher cap level corresponds to a lower cap value or a lower cap level corresponds to a lower cap value. The CAPC value may be an integer in the range of 1-4. When a lower cap value represents a higher level of cap, then a cap value of 1 represents the highest level of cap. When lower cap values represent lower grades of cap, then a cap value of 1 represents the lowest grade of cap.

In this application, priority may refer to both traffic priority and channel access priority CAPC.

10. Signal strength measurement:

the signal strength measurements for SL include received signal strength indication (received singnal strengthen indicator, RSSI) measurements and or reference signal received power (reference signal received power, RSRP) measurements. Alternatively, the signal strength includes RSSI and or RSRP. Similarly, the signal strength threshold includes an RSSI threshold and/or an RSRP threshold.

In this application, the signal strength measurement method is exemplified by RSSI. In practice, it is also possible to measure the signal strength based on RSRP. I.e. "RSSI measurement" may be synonymously replaced by "RSRP measurement", i.e. "RSSI threshold" may be synonymously replaced by "RSRP threshold".

The RSSI is defined as the linear average of the total received power of the OFDM symbols configured for the PSCCH and PSSCH within one slot within the configured subchannel, starting from the second OFDM symbol (i.e., excluding the AGC symbol). Where the symbol where the PSFCH is located does not measure RSSI.

In the actual measurement process, the energy of the resources of 1 symbol by 1 sub-channel is measured, and then the energy of the symbols in the time slot is linearly averaged to obtain 1 RSSI measurement value of the resources of 1 symbol by 1 sub-channel for 1 time slot. Wherein, among the symbols without PSFCH, the average of the energy values of the 12 th to 13 th symbols is measured; among the symbols with PSFCH, the average of the energy values of the 9 th to 10 th symbols was measured.

In NR, RSSI is 1 RSSI measurement for a resource of 1 slot by 1 subchannel. That is, if the PSCCH/PSSCH occupies 3 sub-channels, 3 RSSI measurements for each of the 3 sub-channels would be obtained.

PSSCH-RSRP is by definition the average of the useful signal (i.e., PSSCH-DMRS) power (power of the non-computed CP portion) over all REs carrying PSSCH-DMRS over the linear domain. PSCCH-RSRP is by definition the average of the useful signal (i.e., PCSCH-DMRS) power (power of the non-computed CP portion) over all REs carrying PSCCH-DMRS in the linear domain. Where the symbol where the PSFCH is does not measure RSRP.

In NR, RSRP is 1 RSRP measurement of the resources of the total subchannel for 1 slot PSSCH or PSCCH. That is, if the PSSCH occupies 3 sub-channels, 1 RSRP measurement of the 3 sub-channels would be obtained.

Currently, in order to reasonably allocate the use of channels, the transmission of traffic is controlled by measuring channel states. One way to measure the channel state is CBR measurement: CBR measurement for R16 NR SL CBR measured in time slot n is defined as the proportion of measured RSSI values of resources of 1 time slot x 1 subchannel exceeding a pre-configured or configured threshold within one CBR measurement window time slot n-a, n-1 within one resource pool. Where a is equal to 100slots or 100ms depending on the configuration of the higher layer parameters, which is specifically used is indicated by the RRC field sl-timewindowsizeccbr. The threshold for SL RSSI is indicated by the RRC field SL-ThreshS-RSSI-CBR. The slot index is a physical slot index. As shown in fig. 6, the number of Shan Shixi subchannels (i.e., resources of 1 slot by 1 subchannel, a single-slot subchannel may also be referred to as a subchannel) is 33, assuming that CBR measurement window in the resource pool. Here, for ease of understanding, we illustrate the principle with a measurement window of 11 slots and a frequency domain bandwidth of 3 subchannels (in practice the measurement window is 100slots or 100ms and the frequency domain bandwidth is more than 3 subchannels.) the CBR is 7/33 if the number of occupied subchannels is 7. The occupied sub-channels, i.e. sub-channels with SL-RSSI measurements above a critical value, are considered to be occupied sub-channels. That is, the number of sub-channels calculated as a molecule is 7. The number of sub-channels detected by the terminal device as having an RSSI measurement value less than or equal to the threshold is 33-7 and 26, which are not counted as occupied sub-channels.

Another way to measure the channel state is: CR measurement of R16 NR SL, by definition, SL CR on physical slot n refers to the terminal device itself on physical slot [ n-a, n+b ]]The total number of sub-channels that have been used and that have been granted to be used in the range of (2) is in physical slots [ n-a, n+b]The ratio of the total number of all sub-channels in the range. Specifically, the total number of used and upcoming subchannels = physical slots [ n-a, n-1]The number of sub-channels used in the range + physical slots n, n + b]The number of subchannels that the MAC layer grant is intended to use is obtained within the scope of (1). Wherein the values of a, b are determined by the terminal device itself, but the constraint must be satisfied: a+b+1=t, T being equal to 1000ms or 1000 slots, the specific value being indicated by the RRC field sl-timewindowsizercr;n + b cannot be later than the last transmission opportunity of the grant for the current transmission. In addition CR is alsoSupport for computation for a certain priority, where the molecules of the CR should be replaced by the terminal device itself in physical slots [ n-a, n+b ]]The total number of sub-channels that have been used and that have been licensed, i.e. will be used for transmission of a particular priority transmission.

As shown in fig. 7, the number of Shan Shixi subchannels (i.e., resources of 1 slot×1 subchannel) in the CR measurement window in the resource pool is assumed to be 36. Here, for ease of understanding, we illustrate the principle with a measurement window of 12 slots and a frequency domain bandwidth of 3 subchannels, but in practice the measurement window is 1000 slots or 1000ms and the frequency domain bandwidth is more than 3 subchannels. The number of subchannels already used is 3, the number of authorized subchannels is 2, and CR is (3+2)/36. If CR is calculated according to the priority, in the data with the priority of 1, the number of the used subchannels is 2, and the number of the authorized subchannels is 1, the CR with the priority of 1 is (2+1)/36; in the data with priority 2, the number of used subchannels is 1, and the number of authorized subchannels is 1, and the CR with priority 2 is (1+1)/36.

When the terminal device transmits PSCCH/PSSCH with priority of i in time slot n, it needs to ensure the sigma _i≥k CR(i)≤CR _Limit (k) A. The invention relates to a method for producing a fibre-reinforced plastic composite Wherein CR (i) is the measured CR of priority i, CR _Limit (k) The CR limit with priority k is defined, and the priority value k is equal to or smaller than the priority value i (for example, the priority value corresponding to the higher priority level is lower, the priority level k is equal to or higher than the priority level i). Wherein CR is _Limit (k) The CBR range in which the CBR measurement for time slot N-N is located is related by the priority value k. The CBR measurement is the measurement of time slot N-N, N is the congestion control processing time, and the specific values are shown in Table 4 or

Table 5. The terminal device uses either capability 1 or capability 2. The congestion control processing time N of the terminal device processing capabilities 1 and 2 is related to the subcarrier spacing where μ corresponds to the subcarrier spacing where the PSSCH is transmitted. How to ensure sigma _i≥k CR(i)≤CR _Limit (k) May depend on the implementation of the terminal device.

For example, when the terminal device transmits PSCCH/PSSCH with priority of 6The CR (6) +CR (7) +CR (8). Ltoreq.CR needs to be satisfied _Limit (8)、CR(6)+CR(7)≤CR _Limit (7) And CR (6). Ltoreq.CR _Limit (6) Three conditions. That is, for traffic with a larger priority value, it is necessary to occupy as little resources as possible.

Table 4 congestion control processing time N capability 1

Table 5 congestion control processing time, N capability 2

When more resources in the system are occupied, the terminal device in the control system reduces transmission, so that the resource occupancy rate is reduced. That is, when CBR is large, it is possible to associate smaller CR by _limit To reduce transmission. For example, several packets may be dropped more for low priority traffic and few packets may be dropped for high priority traffic. Similarly, when CBR is small, a larger CR may be associated _limit To increase transmission. For example, transmission may be increased for low priority traffic, e.g., several packets may be multiplexed, and more transmission may be increased for high priority traffic than for low priority traffic.

The channel occupation condition is determined through the measurement of the channel state, and the service transmission can be controlled according to the channel occupation condition, thereby being beneficial to improving the communication reliability. However, in unlicensed spectrum, there is both SL transmission and transmission in the system, possibly WiFi, bluetooth, zigbee, etc. The non-SL system, which is hereinafter referred to as a non-SL system operating on unlicensed spectrum, is a heterogeneous system, such as one or more of WiFi, bluetooth, zigbee. The channel occupation condition of the different system is not considered in the measurement process, and the occupation of the different system can be considered Resulting in CBR measurements that are greater or less than the actual CBR of the SL termination device. If the CBR measurement is greater than the actual value (simply "CBR increase"), this will correspond to a lower CR _limit This is equivalent to limiting the transmission of SL traffic. In this case, the different system terminal apparatus does not reduce transmission due to congestion control of SL. As a result, the SL terminal apparatus is required to reduce transmission, which corresponds to the fact that the different system terminal apparatus is excessively occupied with channels. This is unfair to the SL terminal apparatus. Similarly, if the CBR measurement is less than the actual value (simply "CBR reduction"), this would correspond to a larger CR _limit This corresponds to an increase in the transmission of SL traffic. In this case, the different system terminal apparatus does not increase transmission due to congestion control of SL. As a result, the SL terminal apparatus increases transmission because the resources occupied by transmission by the heterogeneous terminal apparatus are reduced. This is unfair to the different system terminal device.

In other words, since the channel occupation condition of the different system is not considered in the current measurement process of the channel state of the unlicensed spectrum, the measurement result is inaccurate. Further affecting traffic transmission, such as congestion control, may not meet the traffic transmission requirements of the current SL system or different systems, affecting user experience.

In view of the above problems, the embodiments of the present application provide a measurement method, which is applied to an unlicensed spectrum communication system, and can improve accuracy of channel state measurement. The unlicensed spectrum communication system includes a first communication system, such as a SL communication system. It should be understood that the following description will be given of the embodiment of the present application by taking the terminal device as an example of the measurement execution device, but the present application is not limited thereto. It should also be understood that the channel measurement in the embodiments of the present application is described by taking CBR measurement or CR measurement as an example, but CBR measurement and CR measurement are terms in R16/R17, and measure the proportion of the SL terminal occupied by the resource in the resource pool. In contrast, in R18 or in future technological development processes, the terms of CBR measurement and CR measurement may be used for the channel state measurement of the different systems, or other terms may be used to refer to the process, which is not limited in the embodiments of the present application.

The CBR measurement method will be described first.

As shown in fig. 8, the method may include the steps of:

step 801: the number of resource units occupied by the first communication system within the first measurement window is determined.

Step 801 may be performed by a terminal device.

The number of the resource units occupied by the first communication system in the first measurement window is smaller than or equal to the number of the resource units with RSSI measured values larger than a first threshold in the first measurement window.

The resource unit may be a time-frequency resource unit. The time-frequency granularity of the resource units is described below, and is briefly skipped here. It should be understood that the "number of resource units" may also be referred to below simply as "number of resources" and also "resource units" may be referred to below simply as "resources".

The first measurement window may be a CBR measurement window, also referred to as a first CBR measurement window. In particular, the CBR measurement window may be referred to the illustration in fig. 6. It should be appreciated that the time domain length of the CBR measurement window may be predefined, may be indicative, or may be preconfigured. The frequency domain width of the CBR measurement window may be the width of the resource pool or one or more RB sets. The embodiments of the present application are not limited in this regard.

The first communication system may be a SL communication system. The terminal device may be a SL terminal device.

The number of resource units occupied by the first communication system in the first measurement window may be understood as the number of resource units occupied by the terminal device in the first communication system in the first measurement window. For example, the first communication system includes a plurality of terminal apparatuses, and the terminal apparatus is one of the plurality of terminal apparatuses. The plurality of terminal devices have traffic transmissions within the first measurement window, i.e. occupy resources in the channel, respectively. The terminal device may determine the number of resource units occupied by the terminal device in all the first communication systems within the first measurement window.

The number of resource units in the first measurement window for which the RSSI measurement value is greater than the first threshold may be understood as the number of occupied resource units in the first measurement window, or alternatively, the number of busy resource units in the first measurement window. Considering that there may be simultaneous heterogeneous communication in the unlicensed spectrum, the number of resource units in which the RSSI measurement value is greater than the first threshold value in the first measurement window may also be understood as the sum of the number of resource units respectively occupied by the terminal device of the SL system and the terminal device of the heterogeneous system in the first measurement window. Hereinafter, the second communication system is referred to as a foreign system. For example, as shown in fig. 9, taking the first communication system as a SL communication system, the second communication system as a wifi system as an example, the channels in the measurement window are occupied by the SL communication system and the wifi system.

In one possible manner, the terminal device may determine whether a resource is a resource occupied by the first communication system by determining whether a certain block of resource carries SL information and whether an RSSI value of the resource is greater than a first threshold. Such as: the resource unit #a carries SL information, and the RSSI value of the resource unit is greater than the first threshold, the terminal device may determine that the resource unit is occupied by the first communication system. Alternatively, the terminal device may determine whether a certain block of resource carries SL information, and whether the resource is a resource occupied by the first communication system. Such as: the resource unit #a carries SL information, the terminal apparatus may determine that the resource unit is occupied by the first communication system.

Optionally, the manner in which the terminal device determines the resource carrying SL information includes any one of the following:

a) The resource carrying the SL information includes at least one of a bearer PSCCH, PSSCH, PSFCH, PSBCH, S-SSB, DMRS, CSI-RS and CPE (CP extension). Optionally, the PSCCH is carried, including carrying information that passes the CRC check.

b) The resources carrying SL information include resources indicated by bearer Side Control Information (SCI), or the resources indicated by SCI include resources occupied by SL-U. At least one of the time domain indication field, the frequency domain indication resource and the period indication field in the SCI indicates the reserved resource of the SL-U. The reserved resources may be regarded as resources occupied by the SL-U.

c) The resources carrying the SL information comprise resources carrying COT indication information and/or COT sharing information indication, or the resources carrying the COT indication information and/or the COT sharing information indication comprise resources occupied by the SL-U. The COT indication information is used to indicate resources occupied by the terminal device of the initial COT and/or the terminal device sharing the COT. The COT sharing information indicates resources that a certain terminal apparatus shares to other terminal apparatuses.

d) The resources carrying SL information include resources carrying AGC symbols (also known as signals) and/or CPE symbols (also known as signals). The SL-U will perform AGC before transmission. Typically the first symbol of the slot is the symbol used for AGC. The SL-U may also have CPE before transmission, and the SL-U may access the channel on any symbol, if it is before the AGC symbol, the CPE needs to be transmitted.

e) The resources carrying SL information include resources carrying SL synchronization signals. The SL synchronization signals include at least one of primary synchronization signals (primary synchronization signal, PSS), secondary synchronization signals (secondary synchronization signal, SSS), PSBCH. Alternatively, a resource may be determined to be the resource occupied by the SL-U based on the presence of PSS and/or SSS on that resource.

f) The resources carrying SL information include resources carrying SL sequences and/or SL preamble sequences. Optionally, the SL sequence comprises a DMRS sequence. Illustratively, the SL preamble is located at the first symbol of the slot in which the SL is located. Alternatively, the power of the RBs carrying the preamble sequence is equal to the power of the RBs carrying the PSCCH, or the power of the RBs carrying the preamble sequence is equal to the power of the RBs carrying the PSCCH.

It should be appreciated that the above-mentioned resources carrying SL information include resources having RSSI measurements greater than a threshold, resources equal to a first threshold, and/or resources less than a threshold. For the resources equal to the first threshold and/or the resources smaller than the threshold, other terminal devices (e.g. terminal devices far away) may transmit on the overlapping resources without interfering with each other between the two terminal devices. For the resources whose RSSI measurement value is greater than the threshold value, congestion control is required, that is, the resources occupied by the first communication system determined by the terminal device are the resources that carry SL information and whose RSSI measurement value is greater than the threshold value.

The first threshold may be an energy detection threshold X of channel access _Thresh The energy detection threshold may be referred to in the foregoing description, and will not be described in detail herein. The first threshold may be predefined, may be configured, may be preconfigured, or may be indicated, and the embodiment of the present application is not limited thereto.

Step 802: and determining the state of the channel of the first communication system in the first measurement window according to the number of the resource units occupied by the first communication system in the first measurement window and/or the number of the resource units with the RSSI measured value larger than the first threshold value in the first measurement window.

Step 802 may be performed by a terminal device.

Alternatively, the terminal device may determine the channel busy rate of the SL according to at least 2 of the number of resources A1 occupied by the first communication system, the number of resources A2 occupied by the second communication system, the number of resources A, RSSI measured by the RSSI measurement value exceeding the first threshold value not exceeding the first threshold value, and the number of resources B1 usable by the number of resources B, SL within the measurement window C, CBR.

The number of resources B in the CBR measurement window is the total number of resources in the CBR measurement window or the total number of resources in the CBR measurement window in the resource pool.

The number of resources a where the RSSI measurement value exceeds the first threshold may be understood as at least any one of the number of resources occupied by the SL-U (or the number of resources carrying SL information) and the number of resources occupied by the different system (or the number of resources carrying different system information). Alternatively, a resource whose RSSI measurement value exceeds the first threshold value may be understood as a resource whose RSSI measurement value exceeds the first threshold value within the CBR measurement window, or as a resource whose RSSI measurement value exceeds the first threshold value within the CBR measurement window in the resource pool. Correspondingly, it is also understood that the resources in the CBR measurement window where the RSSI measurement value exceeds the first threshold value, or the resources in the resource pool where the RSSI measurement value in the CBR measurement window exceeds the first threshold value.

The number of resources C for which the RSSI measurement value does not exceed the first threshold may be understood as the number of unoccupied resources and/or the number of unmeasured resources. The number of unoccupied resources may be understood as the number of resources for which the RSSI measurement value is less than or equal to the first threshold value. The unmeasured resource may be understood as a resource of a time slot in which the first terminal device transmits. Optionally, the number of resources C includes at least any one of the number of resources unoccupied by the SL-U, the number of resources unoccupied by the different system, and the number of resources of the unmeasured RSSI.

Alternatively, unoccupied resources may be understood as resources in the CBR measurement window where the RSSI measurement value is lower than or equal to the first threshold value, or resources in the resource pool where the RSSI measurement value in the CBR measurement window is lower than or equal to the first threshold value. Correspondingly, the number of resources C, in which the RSSI measurement value does not exceed the first threshold, is the number of resources, in which the RSSI measurement value in the CBR measurement window is lower than or equal to the first threshold, or the number of resources, in which the RSSI measurement value in the CBR measurement window in the resource pool is lower than or equal to the first threshold.

Alternatively, the resources in the CBR measurement window where the RSSI is not measured may be understood as the resources in the resource pool where the RSSI is not measured in the CBR measurement window. For example, the resource on which the RSSI is not measured may be a resource on a transmission slot of the first terminal device.

Alternatively, the number of resources whose RSSI measurement value does not exceed the first threshold may be the sum of the number of resources whose RSSI measurement value is lower than or equal to the first threshold and the number of resources whose RSSI is not measured in the CBR measurement window, or the number of resources whose RSSI measurement value does not exceed the first threshold may be the sum C of the number of resources whose RSSI measurement value is lower than or equal to the first threshold and the number of resources whose RSSI is not measured in the CBR measurement window in the resource pool.

Alternatively, the number of resources for which the RSSI measurement value does not exceed the first threshold may be the total number of resources B within the CBR measurement window minus the number of resources ase:Sub>A for which the RSSI measurement value exceeds the first threshold, i.e. c=b-ase:Sub>A.

The resources occupied by the first communication system include resources carrying SL information and having an RSSI measurement value exceeding a first threshold, or resources carrying SL information among the resources having an RSSI measurement value exceeding the first threshold, or resources having an RSSI measurement value exceeding the first threshold among the resources carrying SL information. Alternatively, the resources occupied by SL may be understood as resources that carry SL information within the CBR measurement window and whose RSSI measurement value exceeds the first threshold, or resources that carry SL information within the CBR measurement window and whose RSSI measurement value exceeds the first threshold in the SL resource pool. Correspondingly, the number of resources A1 occupied by SL is the number of resources A1 carrying SL information in the CBR measurement window and the RSSI measurement value exceeds the first threshold, or the number of resources A1 occupied by SL is the number of resources A1 carrying SL information in the CBR measurement window and the RSSI measurement value exceeds the first threshold in the SL resource pool.

The resources occupied by the second communication system include resources which do not carry SL information and whose RSSI measurement value exceeds a first threshold, or resources which do not carry SL-U information among the resources whose RSSI measurement value exceeds the first threshold. Optionally, the resources occupied by the second communication system include resources that do not carry SL information within the CBR measurement window and the RSSI measurement value exceeds the first threshold, or include resources that do not carry SL information within the CBR measurement window and the RSSI measurement value exceeds the first threshold in the SL resource pool.

Optionally, the resources occupied by the second communication system include at least any one of the following resources: the preamble sequence of the second communication system is associated with resources, resources indicated by control information of the second communication system, resources indicated by COT indication information of the second communication system, resources indicated by COT sharing information of the second communication system, and resources indicated by sequence of the second communication system. Alternatively, the resources that do not carry SL-U information include resources that do not satisfy the judgment condition of the resources that carry SL-U information.

Optionally, the resources occupied by the second communication system include resources that carry the second communication system information in the CBR measurement window and the RSSI measurement value exceeds the first threshold, or the resources occupied by the second communication system include resources that carry the second communication system information in the CBR measurement window and the RSSI measurement value exceeds the first threshold in the resource pool.

Optionally, the number of resources A2 is the number of resources a whose RSSI measurement value exceeds the first threshold subtracted by the number of resources A1 carrying SL information whose RSSI measurement value exceeds the first threshold. That is, a2=A-A 1.

Optionally, the number of resources A2 is the number of resources a whose RSSI measurement exceeds the first threshold subtracted by the number of resources A1 occupied by SL. That is, a2=A-A 1.

Optionally, the number of resources A1 carrying SL information and having an RSSI measurement value exceeding the first threshold, the number of resources A2 occupied by the second communication system, and the number of resources a having an RSSI measurement value exceeding the first threshold satisfy the following relationship: at least any one of a=a1+a2, a1=a-A2, a2=a-A1.

Optionally, the number of resources A1 occupied by SL, the number of resources A2 occupied by the second communication system, and the number of resources a whose RSSI measurement exceeds the first threshold satisfy the relationship: at least any one of a=a1+a2, a1=a-A2, a2=a-A1.

Optionally, the number of resources A2 is the total number of resources B minus the number of resources C for which the RSSI measurement value does not exceed the first threshold and the number of resources A1 occupied by SL. That is, a2=b-C-A1.

Optionally, the number of resources A2 is the total number of resources B minus the number of resources C whose RSSI measurement value does not exceed the first threshold value and the number of resources A1 carrying SL information whose RSSI measurement value exceeds the first threshold value. That is, a2=b-C-A1.

Optionally, the number of resources C and the total number of resources B, whose RSSI measurement value exceeds the first threshold value and whose number of resources A, RSSI measurement value does not exceed the first threshold value, satisfy the relationship: b=a+ C, A =b-C, C =b-ase:Sub>A.

Optionally, the number of resources A1 occupied by SL-U and the RSSI measurement value exceeds the first threshold, the number of resources A2 occupied by the second communication system and the RSSI measurement value exceeds the first threshold, the number of resources C not exceeding the first threshold, the total number of resources B satisfy the relationship: b=a1+a2+c.

Optionally, the number of resources A2 is the number of resources A2 occupied by the second communication system in the CBR measurement window and the RSSI measurement value exceeds the first threshold, or the number of resources A2 is the number of resources A2 occupied by the second communication system in the CBR measurement window in the resource pool and the RSSI measurement value exceeds the first threshold.

The resources that SL may use include at least one of resources that carry SL information, resources that have RSSI measurements less than or equal to a first threshold, and resources that do not measure RSSI.

The resources that the SL can use include resources that the SL can use within the CBR measurement window, or include resources that the SL can use within the CBR measurement window in the resource pool. Correspondingly, the number of available resources for SL is the number of available resources B1 for SL in the CBR measurement window, or the number of available resources B1 for SL in the CBR measurement window in the resource pool.

The resources that the SL can use may also be understood as resources within the CBR measurement window that are not occupied by the second communication system, or include resources within the CBR measurement window in the resource pool that are not occupied by the second communication system. Correspondingly, the number of resources that SL can use is the number B1 of resources within the CBR measurement window that are not occupied by the second communication system, or the number B1 of resources within the CBR measurement window that are not occupied by the second communication system in the resource pool.

Optionally, the number of resources B1 that SL can use is the number of resources B within the CBR measurement window minus the number of resources A2 occupied by the second communication system, i.e. b1=b-A2.

Optionally, the number of resources B1 that the SL can use, the number of resources A1 occupied by the SL, and the number of resources B within the measurement window A, CBR of which the RSSI measurement value is greater than the first threshold satisfy the relationship b=b1+a-A1.

Alternatively, the number of resources B1 that SL can use, the number of resources A1 that SL occupies, the number of resources C that are unoccupied and/or unmeasured satisfy the relationship b1=c+a1.

In one possible way, the terminal device may determine a channel busy state within the first measurement window. It should be understood that the channel busy state may be characterized by a channel busy rate, a channel busy level, or other names, which are not limited in this embodiment of the present application.

The method for determining the busy state of the channel in the first measurement window by the terminal device is as follows:

method 1: the terminal device determines the busy state of the channel of the first communication system in the first measurement window according to the ratio of the number of the resource units occupied by the first communication system in the first measurement window to the number of the resource units in the first measurement window.

For example, if the number of resource units occupied by the first communication system in the first measurement window is A1, the number of resource units in the first measurement window is B, and the channel busy state of the first communication system in the first measurement window is Y, then the following conditions are satisfied:

Y＝A1÷B。

it should be appreciated that the channel busy state of the first communication system within the first measurement window may also be expressed as a ratio of the number of resources carrying SL information and the RSSI measurement value exceeding the first threshold value to the number of resources within the CBR measurement window. Alternatively, the channel busy state of the first communication system in the first measurement window may be expressed as a ratio of the number of resources occupied by SL and the RSSI measurement value exceeding the first threshold value to the number of resources in the CBR measurement window.

Similarly, when there is a second communication system operating on the unlicensed spectrum, the terminal device may also determine a channel status of the second communication system within the first measurement window, for example, a channel busy status, which may also be referred to as a channel busy status of the second communication system.

For example, the channel busy state of the second communication system within the first measurement window may be characterized by "a ratio of the number of resources occupied by the second communication system within the first measurement window to the number of resources within the first measurement window". The number of the resource units occupied by the second communication system in the first measurement window is A2, the number of the resource units in the first measurement window is B, and the busy state of the channel of the first communication system in the first measurement window is Y', then:

Y’＝A2÷B。

it should be understood that the channel busy state of the second communication system in the first measurement window may also be expressed as a ratio of the number of resources carrying the second communication system information and whose RSSI measurement value exceeds the first threshold value to the number of resources in the CBR measurement window. Alternatively, the channel busy state of the second communication system in the first measurement window may be expressed as a ratio of the number of resources occupied by the second communication system and the RSSI measurement value exceeds the first threshold value to the number of resources in the CBR measurement window. Alternatively, the channel busy state of the second communication system in the first measurement window may be expressed as a ratio of the number of resources that do not carry the first communication system information and whose RSSI measurement value exceeds the first threshold value to the number of resources in the CBR measurement window. Alternatively, the channel busy state of the second communication system within the first measurement window may be expressed as a ratio of the number of resources that the first communication system is unoccupied and the RSSI measurement value exceeds the first threshold value to the number of resources within the CBR measurement window.

It should also be appreciated that the channel busy status of the second communication system may also be characterized by parameters in the first communication system.

Illustratively, Y' = (B-A1)/(B).

Wherein B-A1 represents the total number of resources within the CBR measurement window that can be used by the second communication system, the resources that can be used by the second communication system include at least one of resources that do not carry SL information, resources whose RSSI measurement value is less than or equal to the first threshold, and resources whose RSSI is not measured.

The resources that may be used by the second communication system include resources that may be used by the second communication system within the CBR measurement window, or include resources that may be used by the second communication system within the CBR measurement window in the resource pool. Correspondingly, the number B2 of the resources which can be used by the second communication system is the number B-A1 of the resources which can be used by the second communication system in the CBR measurement window, or is the number B-A1 of the resources which can be used by the second communication system in the CBR measurement window in the resource pool.

The resources that the second communication system can use are also understood to be resources within the CBR measurement window that are not occupied by the first communication system, or include resources within the CBR measurement window that are not occupied by the first communication system in the resource pool. Correspondingly, the number of resources B2 that the second communication system can use is the number of resources B-A1 in the CBR measurement window that are not occupied by the first communication system, or is the number of resources B-A1 in the resource pool that are not occupied by the first communication system in the CBR measurement window.

Alternatively, the number of resources that the second communication system can use is the number of resources B within the CBR measurement window minus the number of resources A1 occupied by the first communication system, i.e. b2=b-A1.

Optionally, the number of resources B2 that the second communication system may use, the number of resources A1 occupied by SL, and the number of resources within the measurement window A, CBR where the RSSI measurement value is greater than the first threshold satisfy the relationship b=b2+a-A1.

Alternatively, the number of resources B2 that the second communication system can use, the number of resources A2 that the second communication system occupies, the number of resources C that are unoccupied and/or unmeasured satisfy the relationship b2=c+a2.

Alternatively, the number of resources that the second communication system can use may also be expressed as at least any one of B-A+A2, B-A1, or A2+C.

Similarly, the channel busy status of the first communication system may also be characterized by parameters in the second communication system

Y＝(B-A2)÷B。

The B-A2 represents the resources that can be used by the first communication system, and may be specifically referred to as the foregoing, and will not be described herein.

Method 2: determining a channel busy status of the first communication system within the first measurement window according to the following relationship:

Y＝A1÷[B-(C-A1)]，

wherein Y represents a channel busy state of the first communication system in the first measurement window, A1 represents a number of resource units occupied by the first communication system in the first measurement window, C represents a number of resource units whose RSSI measurement value is greater than a first threshold in the first measurement window, and B represents a number of resource units included in the first measurement window.

In other words, in the above relation, the denominator corresponding to the CBR measurement excludes the resources occupied by the second communication system. The proportion of resources occupied by the SL relative to the resources that the SL can use is calculated. I.e. equivalent to calculating the duty cycle of the SL system. The above relationship may be modified into the following relationship:

Y＝A1÷[B-A+A1],

alternatively, the channel busy rate of SL can also be expressed as: the ratio of the number of resources A1 carrying SL information and the RSSI measurement value exceeding the first threshold to the total number of resources that can be occupied by SL within the CBR measurement window. Namely Y=A1.2 (B-A+A1) y=a1++ (B-ase:Sub>A 2) or y=a1++c. Wherein C is the number of resources in the first measurement window for which the RSSI measurement value does not exceed the first threshold. In other words, the total number of resources that can be occupied by SL is at least any one of B-A+A1, B-A2, or A1+C.

Similarly, a channel busy status of the second communication system within the first measurement window may also be determined.

Illustratively, the channel busy status of the second communication system within the first measurement window is determined according to the following relationship:

Y’＝A2÷(B-A1)。

the denominator corresponding to the CBR measurement excludes the resource A1 occupied by SL. The proportion of the resources occupied by the different system relative to the resources available to the second communication system is calculated. I.e. equivalent to calculating the duty cycle of the second communication system.

Alternatively, the channel busy state of the second communication system in the first measurement window may be expressed as a ratio of the number of resources occupied for the second communication system to the total number of resources that can be occupied by the second communication system in the CBR measurement window. I.e., Y '= (a-A1)/(B-A1) or Y' = (B-C-A1)/(B-A1).

That is, the second communication system occupies at least any one of the resources A2, a-A1 or B-C-A1. The total number of resources that may be occupied by the second communication system is at least any one of B-a+a2, B-ase:Sub>A 1, or a2+c. Wherein, a is the number of resources whose RSSI measurement value exceeds a first threshold, A1 is the number of resources occupied by SL, or A1 is the number of resources which bear SL information and whose RSSI measurement value exceeds the first threshold, A2 is the number of resources occupied by the second communication system, B is the number of resources in the CBR measurement window, and C is the number of resources whose RSSI measurement value does not exceed the first threshold and/or is not measured.

In another possible way, the terminal device may determine the channel idle state within the first measurement window. It should be understood that the channel idle state may be characterized by a channel idle rate, or otherwise referred to, and embodiments of the present application are not limited thereto.

Method a: and determining the idle state of the channel of the first communication system in the first measurement window according to the ratio of the number of resource units with the RSSI measured value smaller than or equal to the first threshold value to the number of resources except the resources occupied by the second communication system in the resources in the CBR measurement window.

Illustratively, the channel idle state of the first communication system within the first measurement window may be derived from the following relationship:

X＝C÷(B-A2)，

wherein X is the channel idle state of the first communication system within the first measurement window.

In the channel idle rate calculation mode, the resources A2 occupied by the second communication system are excluded from the denominator, and the numerator is the number C of resources of which the RSSI measured value in the whole communication system does not exceed the first threshold value. I.e. the proportion of unoccupied resources relative to the resources that the SL is able to use is calculated.

Alternatively, the channel idle state of the first communication system within the first measurement window may also be expressed as a ratio of the number of resources for which the RSSI measurement value does not exceed the first threshold value to the total number of resources within the CBR measurement window that may be occupied by the first communication system. I.e. x=c/f (B-a+a1), x=c/f (B-ase:Sub>A 2) or x=c/f (a1+c). The total number of resources that may be occupied by the first communication system is B-a+a1, B-ase:Sub>A 2, or a1+c. Wherein, a is the number of resources whose measured value of RSSI exceeds a first threshold in the first measurement window, A1 is the number of resources occupied by the first communication system, or A1 is the number of resources which bear SL information and whose measured value of RSSI exceeds the first threshold, A2 is the number of resources occupied by the second communication system, B is the number of resources in the CBR measurement window, and C is the number of resources whose measured value of RSSI does not exceed the first threshold.

Method b: and determining the idle state of the channel of the second communication system in the first measurement window according to the ratio of the number of resource units with the RSSI measured value smaller than or equal to the first threshold value to the number of resources except the resources occupied by the first communication system in the resources in the CBR measurement window.

For example, the channel idle state of the second communication system within the first measurement window may be derived from the following relationship:

X’＝C÷(B-A1)，

wherein X' is the channel idle state of the second communication system within the first measurement window.

In the calculation corresponding to the idle state of the channel, the resource A1 occupied by the first communication system is excluded from the denominator, and the numerator is the number of resources of which the RSSI measured value in the whole system does not exceed the first threshold value. I.e. the proportion of unoccupied resources relative to the resources that the second communication system is able to use is calculated.

Optionally, the channel idle rate of the second communication system is a ratio of the number of resources C for which the RSSI measurement value does not exceed the first threshold value to the total number of resources within the CBR measurement window that can be occupied by the second communication system. I.e., X ' = (B-ase:Sub>A)/(B-a+a2), X ' = (B-ase:Sub>A)/(B-ase:Sub>A 1), or X ' =c/(a2+c). The number of resources C for which the RSSI measurement does not exceed the first threshold may be B-A. The total number of resources that may be occupied by the second communication system is B-a+a2, B-ase:Sub>A 1, or a2+c. Wherein, a is the number of resources that the RSSI measurement value exceeds the first threshold, A1 is the number of resources that the SL occupies, or A1 is the number of resources that the SL information is carried and the RSSI measurement value exceeds the first threshold, A2 is the number of resources that the second communication system occupies, B is the number of resources in the CBR measurement window, and C is the number of resources that the RSSI measurement value does not exceed the first threshold.

In a further possible manner, the terminal device may determine the situation of the resources occupied by the first communication system and the resources occupied by the second communication system within the first measurement window.

Method (1): the channel busy state can be characterized by a two-dimensional array of resources occupied by the first communication system and resources occupied by the second communication system. Optionally, congestion control is performed on the first communication system according to the two-dimensional array.

Illustratively, the resource duty cycle of the first communication system is a ratio of the number of resources occupied by the first communication system A1 within the first measurement window to the total number of resources that can be occupied by the first communication system within the first measurement window. Namely A1 ≡ (B-a+a1), A1 ≡ (B-ase:Sub>A 2) or A1 ≡ (a1+c), wherein A1 is the number of resources occupied by the first communication system, or A1 is the number of resources carrying SL information and having an RSSI measurement value exceeding ase:Sub>A first threshold, ase:Sub>A 2 is the number of resources occupied by the second communication system, B is the number of resources within the CBR measurement window, and C is the number of resources having an RSSI measurement value not exceeding the first threshold.

The resource duty ratio of the second communication system is the ratio of the number of resources A2 occupied by the second communication system to the total number of resources that can be occupied by the second communication system in the CBR measurement window. Namely A2/B-A1, (a-A1) B-A1 or B-C-A1B-A1, wherein A is the number of resources of which the RSSI measured value exceeds a first threshold value, A1 is the number of resources occupied by SL, or A1 is the number of resources of which the SL information is carried and the RSSI measured value exceeds the first threshold value, A2 is the number of resources occupied by a second communication system, B is the number of resources in a first measurement window, and C is the number of resources of which the RSSI measured value does not exceed the first threshold value.

That is, the busy state of the channel is commonly embodied by a two-bit array of the resources occupied by the first communication system and the resources occupied by the second communication system.

That is, the resource duty cycle of the first communication system may be characterized by the parameters of the second communication system, as well as the resource duty cycle of the second communication system may be characterized by the parameters of the first communication system.

Method (2): the condition of the resources occupied by the first communication system and the resources occupied by the second communication system can be characterized by the ratio of the resources occupied by the first communication system to the resources occupied by the second communication system.

Illustratively, the ratio of the first communication system resource occupancy to the second communication system resource occupancy may be: the number of resources occupied by the first communication system divided by the number of resources occupied by the second communication system, i.e. A1.multidot.A2, A1.multidot.a-A1 or A1.multidot.B-C-A1. Alternatively, the ratio of the resources occupied by the first communication system to the resources occupied by the second communication system is the number of resources occupied by the second communication system divided by the number of resources occupied by the first communication system, i.e., A2.multidot.A1, (a-A1)/(A1) or (B-C-A1)/(A1). Wherein A is the number of resources of which the RSSI measured value exceeds a first threshold value, A1 is the number of resources occupied by a first communication system, or A1 is the number of resources which bear SL information and of which the RSSI measured value exceeds the first threshold value, A2 is the number of resources occupied by a second communication system, B is the number of resources in a first measurement window, and C is the number of resources of which the RSSI measured value does not exceed the first threshold value.

Method (3): the condition of the resources occupied by the first communication system and the resources occupied by the second communication system may be characterized by a difference between the resources occupied by the first communication system and the resources occupied by the second communication system.

Illustratively, the difference between the first communication system resource occupancy and the second communication system resource occupancy is: the number of resources occupied by the first communication system minus the number of resources occupied by the second communication system, i.e. A1-A2, A1- (a-A1), 2 x A1-A, A1- (B-C-A1) or (2 x A1) -b+c is satisfied. Alternatively, the number of resources occupied by the second communication system minus the number of resources occupied by the SL, i.e. satisfies at least one of A2-A1, (a-A1) -A1, A-2 xA 1, (B-C-A1) -A1 or B-C- (2 xA 1). Wherein A is the number of resources of which the RSSI measured value exceeds a first threshold value, A1 is the number of resources occupied by a first communication system, or A1 is the number of resources which bear SL information and of which the RSSI measured value exceeds the first threshold value, A2 is the number of resources occupied by a second communication system, B is the number of resources in a CBR measurement window, and C is the number of resources of which the RSSI measured value does not exceed the first threshold value.

It should be understood that the foregoing two-dimensional array, ratio or difference of the resources occupied by the first communication system and the resources occupied by the second communication system is used to represent the channel state in the first measurement window, which is merely by way of example and not by way of limitation, and other ways of representing the channel state in the first measurement window by using the resources occupied by the first communication system and the resources occupied by the second communication system are also within the scope of the present application, for example, the number of resources in the first measurement window having an RSSI greater than the first threshold value may also be represented by the number of resources having an RSSI less than or equal to the first threshold value, for example, a=b-C, where C is the number of resources having an RSSI less than or equal to the first threshold value. For another example, A2 is the number of resources a whose RSSI measurement value exceeds the first threshold minus the number of resources A1 carrying SL information and whose RSSI measurement value exceeds the first threshold, or the number of resources A2 is the number of resources a whose RSSI measurement value exceeds the first threshold minus the number of resources A1 occupied by SL, that is, a2=a-A1. For another example, the number of resources B2 in the CBR measurement window that are not occupied by the second communication system may be understood as the number of resources B2 that can be used by the SL, which is the number of resources B in the CBR measurement window minus the number of resources A2 occupied by the different system, that is, b2=b-A2. For another example, the number of resources B2 that the SL can use, the number of resources A1 occupied by the SL, and the number of resources within the measurement window A, CBR where the RSSI measurement value is greater than the first threshold satisfy the relationship b=b2+a-A1. For another example, the number of resources B2 that the SL may use, the number of resources A1 that the SL occupies, the number of resources C that are unoccupied and/or unmeasured (i.e., the number of resources that the RSSI measurement does not exceed the first threshold) satisfy the relationship b2=c+a1.

It should also be appreciated that the above method can be applied to scenarios where both the first communication system and the second communication system operate in unlicensed spectrum, such as scenarios of dynamic channel access. The following describes a channel measurement method that can be applied in a scenario where the first communication system is in operation, such as in a scenario of semi-static channel access.

Determining a channel busy state of the first communication system in the first CBR measurement window based on a ratio of a number of resource units in the first measurement window where the RSSI measurement value is greater than the first threshold to a number of resource units in the first CBR measurement window and the first offset,

or,

determining a channel busy state of the first communication system in the first CBR measurement window based on a ratio of a number of resource units in the first CBR measurement window for which the RSSI measurement value is greater than the first threshold to a number of resource units in the first CBR measurement window and the first coefficient,

As can be seen in conjunction with fig. 5, in the semi-static channel access scenario, the duration of one measurement window includes a period of idle time, resulting in inaccurate measurement results.

Thus, in one possible way, the first offset or the first coefficient is used to adjust the measurement result.

Illustratively, the CBR measurement is CBR measurement + offset, or the CBR measurement is CBR measurement times α, or the CBR measurement is CBR measurement divided by β.

Optionally, the CBR measurement is a ratio of the number of resources for which the RSSI measurement exceeds the first threshold to the total number of resources within the CBR measurement window.

That is, the above CBR measurement may satisfy the following relationship:

Y＝(A1÷B)+offset，

or,

Y＝(A1÷B)*α，

or,

Y＝(A1÷B)÷β，

wherein Y represents the number of resources occupied by the first communication system in the channel busy state A1 of the first communication system in the first measurement window, the number of resources exceeding the first threshold value is the same as the number of resources exceeding the first threshold value in the RSSI measurement value in the semi-static channel access mode, B represents the number of resource units included in the first measurement window, offset is a first offset, and α or β is a first coefficient.

Optionally, the value range of the offset is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of offset is a fixed value, e.g., offset=0.05. Optionally, the value of the offset is at least 1 value configured in the list, e.g., at least 2 values in {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1} the value of the configured or preconfigured offset is 0.05.

Optionally, α is a value with a value range greater than or equal to 1. One possible implementation, the value of α is a fixed value, e.g., α=1.05. Alternatively, the value of α is at least 1 value configured in the list, e.g., at least 2 values in {1,1.01,1.02,1.03,1.04,1.05,1.06,1.07,1.08,1.09,1.1}, the value of configured or preconfigured α is 1.05.

Optionally, the value range of β is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of β is a fixed value, e.g., β=0.95. Alternatively, the value of β is at least 1 value configured in the list, e.g., at least 2 values in {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1}, and the value of configured or preconfigured β is 0.95.

In another possible way, the first coefficient is used to adjust the number of resources in the CBR measurement window.

A channel busy condition of the first communication system in the first CBR measurement window is determined based on a ratio of a number of resource units in the first CBR measurement window for which the RSSI measurement value is greater than the first threshold to a number of resource units in the first CBR measurement window. The number of resource units in the first CBR measurement window is the actual number of transmission resources in the CBR measurement window multiplied by M.

That is, the above CBR measurement may satisfy the following relationship:

Y＝(A1÷B)*M，

illustratively, the first coefficient is M and the number of resources within the CBR measurement window B is the number of actual resources within the CBR measurement window multiplied by M. Optionally, the value range of M is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of M is a fixed value, e.g., m=0.95. Alternatively, the value of M is at least 1 value configured in the list, e.g., at least 2 values in {0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1}, the value of configured or preconfigured M is 0.95.

In yet another possible way, the first coefficient is used to adjust the size of the CBR measurement window.

A channel busy condition of the first communication system in the first CBR measurement window is determined based on a ratio of a number of resource units in the first CBR measurement window for which the RSSI measurement value is greater than the first threshold to a number of resource units in the first CBR measurement window. Wherein the first CBR measurement window includes resources located in the first M in the time domain in each transmission period T, or the first CBR measurement window does not include resources in idle time.

That is, the above CBR measurement may satisfy the following relationship:

Y＝(A1÷B)*M，

illustratively, the CBR measurement window includes resources that are temporally located at the previous M within each transmission period T, or the CBR measurement window does not include resources of idle time. Optionally, the value range of M is more than or equal to 0 and less than or equal to 100%. One possible implementation, the value of M is a fixed value, e.g., m=95%. Optionally, the value of M is at least 1 value configured in the list, e.g., the list is at least 2 of {50%,55%,60%,65%,70%,75%,80%,85%,90%,95%,100% }, the value of configured or preconfigured M is 95%. Alternatively, the value of M is determined from the value of the transmission period T,

For exampleOr->Converted to a percent value.

As another example, the CBR measurement window includes resources that are temporally located in the first min { mxt, T-0.1} ms within each transmission period T. Optionally, the value range of M is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of M is a fixed value, e.g., m=0.95. Alternatively, the value of M is at least 1 value configured in the list, e.g., at least 2 of the list {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1}, the value of configured or preconfigured M is 0.95.

Optionally, each transmission period T is a transmission period within 1 or 2 radio frames. The period T takes at least one value of {1,2,2.5,4,5,10} ms. Wherein, the 2 radio frames comprise 20/T transmission periods, or the 1 radio frames comprise 10/T transmission periods.

In yet another possible manner, the first coefficient is used to adjust the number of resources within the first measurement window where the RSSI measurement value exceeds the first threshold.

A channel busy condition of the first communication system in the first CBR measurement window is determined based on a ratio of a number of resource units in the first CBR measurement window for which the RSSI measurement value is greater than the first threshold to a number of resource units in the first CBR measurement window. Wherein the number of resource units whose RSSI measurement value is greater than the first threshold value is the actual number of resource units whose RSSI measurement value is greater than the first threshold value plus offset, or the actual number of resources whose RSSI measurement value exceeds the first threshold value is multiplied by alpha, or the actual number of resources whose RSSI measurement value exceeds the first threshold value is divided by beta.

That is, the above CBR measurement may satisfy the following relationship:

Y＝(A1+offset)÷B，

or,

Y＝(A1*α)÷B，

or,

Y＝(A1÷β)÷B，

for example, the number of resources a whose RSSI measurement value exceeds the first threshold value is the actual number of resources a ' whose RSSI measurement value exceeds the first threshold value plus offset, or the actual number of resources a ' whose RSSI measurement value exceeds the first threshold value is multiplied by α, or the actual number of resources a ' whose RSSI measurement value exceeds the first threshold value is divided by β.

Optionally, the value range of the offset is greater than or equal to 1. One possible implementation, the value of offset is a fixed value. Optionally, the value of the offset is at least 1 value configured in the offset list.

Optionally, α is a value with a value range greater than or equal to 1. One possible implementation, the value of α is a fixed value, e.g., α=1.05. Alternatively, the value of α is at least 1 value configured in the list, e.g., at least 2 of the list {1,1.01,1.02,1.03,1.04,1.05,1.06,1.07,1.08,1.09,1.1}, the value of configured or preconfigured α is 1.05.

Optionally, the value range of β is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of β is a fixed value, e.g., β=0.95. Alternatively, the value of β is at least 1 value configured in the list, e.g., at least 2 of the list {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1}, and the value of configured or preconfigured β is 0.95.

In this embodiment, in the dynamic channel access scenario, the terminal device determines the number of resources respectively occupied by the first communication system and the second communication system; in the semi-static channel access scene, the terminal device redefines the size of the measurement window, or redefines the quantity of resources included in the measurement window, or redefines the quantity of occupied resources, so as to determine the actually occupied resources, further determine the channel state, and improve the accuracy of channel measurement.

Optionally, this embodiment may further include the steps of:

step 803: determining from the channel measurements whether at least one of the following characteristics is enabled: whether periodic reservation (reservation) is enabled, whether preemption (pre-transmission reservation) and/or re-evaluation (re-evaluation) is enabled, or whether the second SL information is enabled to be transmitted within the first SL information initial COT.

One possible implementation may determine to enable at least one of the above characteristics based on CBR conditions, which are at least one of:

the channel busy state of the first communication system is greater than and/or equal to a threshold #a;

the channel busy status of the second communication system is less than and/or equal to a threshold #b;

The difference between the channel busy state of the first communication system and the channel busy state of the second communication system is greater than a threshold #C;

the ratio of the channel busy status of the first communication system to the channel busy status of the second communication system is greater than a threshold #d.

The threshold #a, the threshold #b, the threshold #c, and/or the threshold #d may be predefined, may be preconfigured, may be configured, or may be indicated, which is not limited in the embodiment of the present application.

It will be appreciated that when

The channel busy state of the first communication system is less than a threshold #A;

the channel busy state of the second communication system is greater than a threshold #B;

the difference between the channel busy state of the first communication system and the channel busy state of the second communication system is less than a threshold #C;

when the ratio of the channel busy state of the first communication system to the channel busy state of the second communication system is less than the threshold value # D,

the period reservation may be disabled, preemption may be disabled, or the transmission of the second SL information within the first SL information initial COT may be disabled.

The above-mentioned enabling period reservation can be understood as enabling reservation of the terminal device between the COTs. Optionally, enabling and/or disabling the periodic reservation of the terminal device comprises enabling and/or disabling the periodic reservation of the terminal device within the resource pool.

The periodic reservation of the terminal device may be indicated by a first field in the first order SCI, for example. For enabling cycle reservation or enabling inter-COT reservation, the first field indicates a non-0 cycle value, e.g., any of {1,2,3, …,98,99} ms or {100,200,300, …,900,1000} ms. For disabling period reservations or disabling inter-COT reservations, the value of the first field is 0 or the first field indicates a reservation interval value of 0.

The preemption enabling preemption checking and/or re-assessment includes enabling preemption checking and/or re-assessment of resources within the COT.

In a possible case, the first resources reserved by the first terminal device overlap or partially overlap with the second resources reserved by the second terminal. When the priority value of the first terminal device is greater than the priority value of the second terminal device, and the channel state satisfies the above CBR condition, the first terminal device may determine that the first resource is preempted. Alternatively, when the priority value of the first terminal device is greater than the first priority threshold, and the channel state satisfies the above CBR condition, the first terminal device determines that the first resource is preempted. Or, when the priority value of the second terminal device is smaller than the first priority threshold value and the channel state satisfies the CBR condition, the first terminal device determines that the first resource is preempted. Alternatively, the priority value may be a CAPC value, a priority value indicated in the SCI, and/or a priority value indicated in the first order SCI. Optionally, the first resource is a resource indicated by SCI of the first terminal device, and/or the first resource is a resource indicated by COT sharing information of the first terminal device. Optionally, the second resource is a resource indicated by SCI of the second terminal device, and/or the second resource is a resource indicated by COT sharing information of the second terminal device.

In a possible case, the first resources reserved by the first terminal device overlap or partially overlap with the second resources reserved by the second terminal. When the priority value of the first terminal device is greater than the priority value of the second terminal device, and the channel state satisfies the above CBR condition, the second terminal device may determine that the second resource is not preempted. Alternatively, when the priority value of the first terminal device is greater than the first priority threshold and the channel state satisfies the CBR condition, the second terminal device determines that the second resource is not preempted. Or, when the priority value of the second terminal device is smaller than the first priority threshold value and the channel state satisfies the CBR condition, the second terminal device determines that the second resource is not preempted. Alternatively, the priority value may be a CAPC value, a priority value indicated in the SCI, and/or a priority value indicated in the first order SCI. Optionally, the second resource is a resource indicated by SCI of the second terminal device, and/or the second resource is a resource indicated by COT sharing information of the second terminal device.

In another possible case, the first resource determined by the first terminal device overlaps or partially overlaps with the second resource reserved by the second terminal device. For a second resource reserved by the second terminal device, the RSRP measured value of the second resource is greater than the first signal strength threshold, and the first terminal device may report the first resource determined by the first terminal device to a higher layer for re-evaluation. Alternatively, the first signal strength threshold may be determined based on the priority of the first terminal device and the priority indicated in the SCI of the second terminal device. Optionally, the priority of the first terminal device is a priority with which the first terminal device selects the first resource.

Wherein the first terminal device may be a SL terminal and the second terminal device may be a terminal in the second communication system; alternatively, both the first terminal device and the second terminal device are SL terminals. The embodiments of the present application are not limited in this regard.

The above-mentioned second SL information is transmitted within the initial COT of the first SL information may also be understood as COT sharing. In other words, the first SL information and the second SL information come from different terminal apparatuses.

Optionally, enabling the COT sharing includes enabling the COT sharing of the terminal device and/or enabling the COT sharing between the transmitting terminal device and the receiving terminal device. COT sharing involves transmission on different sub-channels or different interleaved channels within the same time slot within the COT, or on different time slots within the COT.

In one possible scenario, the first terminal device initiates (initial) the first COT. The second terminal device shares the first COT and transmits SL information within the first COT. Optionally, the SL transmissions by the second terminal device within the first COT are sent to the first terminal device. In this case, enabling the COT sharing may also be understood as allowing the first terminal device to share the first COT and/or the second terminal device acknowledging the sharing of the first COT initiated by the first terminal device.

In another possible case, the second terminal device initiates the first COT. The first terminal device shares the first COT and transmits SL information within the first COT. Optionally, the SL transmissions by the first terminal device within the first COT are sent to the second terminal device. In this case, enabling the COT sharing may also be understood as allowing the second terminal device to share the first COT and/or the first terminal device acknowledging the sharing of the first COT initiated by the second terminal device.

The above-mentioned second SL information is transmitted within the first SL information initial COT of the first terminal device may also be understood as the second SL information of the first terminal device is transmitted within the first SL information initial COT of the first terminal device. In other words, the first SL information and the second SL information come from the same terminal apparatus. The first SL information initial COT may also be understood as a cap initial COT according to the first SL information. The first SL information and the second SL information may be transmitted on different subchannels or different interleaved channels of the same slot within the COT, or the first SL information and the second SL information may be transmitted on different slots within the COT.

It should be understood that the above schemes are described by taking the enabling as an example, and the disabling schemes correspond to the above schemes and are not described herein.

It should also be understood that the above-mentioned enabling may also be understood as activating, and disabling may be understood as deactivating, or may be otherwise functionally similar, and the embodiments of the present application are not limited thereto.

It should also be understood that the numbers in the above schemes are by way of example only and not by way of limitation.

In summary, the first terminal device reserves a resource, and the second terminal device excludes the resource when detecting the reservation information of the first terminal device. However, when the second communication system occupies more channels, the first terminal apparatus is not necessarily able to successfully access the channels before reserving resources or reserving resources. It may be caused that neither the first terminal device nor the second terminal device uses the first resource transmission. Preemption checking and reevaluation are similar theories. When the first terminal device and the second terminal device select overlapping resources and the second communication system occupies a large number of channels, the second terminal device is not necessarily able to transmit using the first resources even if the first terminal does not use the first resources. That is, when the second communication system occupies more resources, the reservation mechanism of the SL may not necessarily bring gain, but may cause the SL terminal device to excessively exclude the available resources. By the method, the problems can be avoided, the possible resource waste is avoided, the resource utilization rate is improved, meanwhile, the service information of the terminal device can be sent in time, the time delay is reduced, and the user experience is further improved.

The measurement modes of the channel busy state and the channel idle state and the use modes of the measurement results are introduced, and the measurement and use modes of the channel occupation state on the unlicensed spectrum are described in detail below.

The present application proposes yet another embodiment, which provides a measurement method, applied to an unlicensed spectrum communication system, capable of improving accuracy of channel occupancy state measurement. The unlicensed spectrum communication system comprises a first communication system, wherein the first communication system may be a SL communication system. It should be understood that the following description will be given of the embodiment of the present application by taking the terminal device as an example of the measurement execution device, but the present application is not limited thereto.

As shown in fig. 10, the method may include the steps of:

step 1001: the number of resource units occupied by the first communication system within the second measurement window is determined.

Step 1001 may be performed by a terminal device.

The first communication system occupies a number of resource units within the second measurement window that is less than or equal to a number of resource units within the second measurement window for which the RSSI measurement value is greater than a second threshold.

Wherein the first communication system may be a SL communication system. The termination device may be a SL termination.

The second measurement window may be a CR measurement window, and in particular, the CR measurement window may be described with reference to fig. 7. It should be understood that the length of the CR measurement window may be predefined, may be indicated, or may be preconfigured, and the embodiments of the present application are not limited thereto. Measuring CR may also be understood as evaluating CR.

The number of resource units occupied by the first communication system in the second measurement window may be understood as the number of resource units occupied by the terminal device in the first communication system in the second measurement window, e.g. the first communication system comprises a plurality of terminal devices, one of the plurality of terminal devices. The plurality of terminal devices have traffic transmissions within the first measurement window, i.e. occupy resources in the channel, respectively. The terminal device may determine the number of resource units occupied by the terminal device in all the second communication systems within the second measurement window.

The number of resource units in the second measurement window for which the RSSI measurement value is greater than the first threshold may be understood as the number of occupied resource units in the second measurement window, or alternatively, the number of busy resource units in the second measurement window. In view of the fact that there may be simultaneous communication of the second communication system in the unlicensed spectrum, the number of resource units in which the RSSI measurement value is greater than the first threshold value in the second measurement window may also be understood as the sum of the number of resource units respectively occupied by the terminal device of the SL system and the terminal device of the foreign system in the second measurement window. For example, as shown in fig. 11, taking the first communication system as a SL communication system, the second communication system as a wifi system as an example, the channels in the measurement window are occupied by the SL communication system and the wifi system.

In one possible manner, the terminal device may determine whether a resource is a resource occupied by the first communication system by determining whether a certain block of resource carries SL information and whether an RSSI value of the resource is greater than a first threshold. Such as: the resource unit #a carries SL information, and the RSSI value of the resource unit is greater than the first threshold, the terminal device may determine that the resource unit is occupied by the first communication system. Specifically, the manner in which the terminal device determines the resource carrying SL information may refer to the manner a) to the manner f) in step 801, which will not be described herein.

In fig. 11, the measurement window includes time slots [ n-a, n+b ] in the time domain, which may be referred to as a third measurement window (or CR measurement window), which further includes a second measurement window (also referred to as a first CR window) and a fourth measurement window (also referred to as a second CR window), such as the second measurement window includes time slots [ n-a, n-1] in the time domain, the fourth measurement window includes time slots [ n, n+b ] in the time domain, and time slot n is a time slot for measuring CR.

The number of resource units occupied by the first communication system in the second measurement window is less than the number of resource units whose RSSI measurement value in the second measurement window is greater than the second threshold, and other communication systems, such as a different system (also referred to as a second communication system), may also exist on the channel of the second measurement window, and the second communication system may refer to the related description in step 801 and will not be repeated herein.

The number of resource units occupied by the first communication system within the second measurement window is equal to the number of resource units for which the RSSI measurement value is greater than the second threshold value within the second measurement window, possibly if only the first communication system is operating (or running) on the channel of the second measurement window.

The second threshold may be an energy detection threshold X of channel access _Thresh The energy detection threshold may be referred to in the foregoing description, and will not be described in detail herein. The second threshold may be predefined, may be configured, may be preconfigured, or may be indicated, and the embodiment of the present application is not limited thereto.

Step 1002: and determining the state of a channel of the first communication system in a third measurement window according to the number of the resource units occupied by the first communication system in the second measurement window, wherein the third measurement window comprises the second measurement window.

Step 1002 may be performed by a terminal device.

Alternatively, the channel occupancy state of the SL may be determined according to at least 2 of the number of resources G1 occupied by the SL, the number of resources G2 occupied by the different system, the number of resources G, RSSI measured by the RSSI exceeding the second threshold, the number of resources G 'not exceeding the second threshold and/or the number of resources G' not measuring the RSSI, the total number of resources D1 in the first CR window, the total number of resources D2 in the second CR window, the number of resources D in the CR measurement window, the number of resources E transmitted by the first terminal device, and the number of resources F authorized by the first terminal device.

The number of resources D in the CR measurement window is the total number of resources in the CR measurement window or the total number of resources in the CR measurement window in the resource pool. The total number of resources in the first CR window is D1, and the total number of resources in the second CR window is D2. Or the total number of resources in the first CR window in the resource pool is D1, and the total number of resources in the second CR window in the resource pool is D2. The total number of resources D within the CR measurement window is the sum of the total number of resources D1 within the first CR window and the total number D2 within the second CR window.

The number of resources G where the RSSI measurement value exceeds the second threshold may be understood as at least any one of the number of resources occupied by SL (or the number of resources carrying SL information) within the first CR window and the number of resources occupied by the second communication system (or the number of resources carrying second communication system information). Alternatively, the resources whose RSSI measurement value exceeds the second threshold may be understood as the resources whose RSSI measurement value exceeds the second threshold in the first CR window, or the resources whose RSSI measurement value exceeds the second threshold in the first CR window in the resource pool. Correspondingly, the number of resources G may be understood as the number of resources in which the RSSI measurement value in the first CR window exceeds the second threshold, or the number of resources G may be the number of resources in the resource pool in which the RSSI measurement value in the first CR window exceeds the second threshold.

The number of resources G' for which the RSSI measurement value does not exceed the second threshold value may be understood as the number of unoccupied resources and/or the number of unmeasured resources. The number of unoccupied resources may be understood as the number of resources for which the RSSI measurement value is less than or equal to the second threshold value. The unmeasured resource may be understood as a resource of a time slot in which the first terminal device transmits. Optionally, the number of resources G' includes at least any one of the number of resources unoccupied by the SL, the number of resources unoccupied by the second communication system, and the number of resources of the unmeasured RSSI.

Alternatively, unoccupied resources may be understood as resources in the first CR window where the RSSI measurement value is lower than or equal to the second threshold value, or resources in the resource pool where the RSSI measurement value in the first CR window is lower than or equal to the second threshold value. Correspondingly, the number of resources G' whose RSSI measurement value does not exceed the second threshold value is the number of resources whose RSSI measurement value in the first CR window is lower than or equal to the second threshold value, or the number of resources whose RSSI measurement value in the first CR window in the resource pool is lower than or equal to the second threshold value.

Alternatively, resources in the CR measurement window where RSSI is not measured may be understood as resources in the first CR window in the resource pool where RSSI is not measured. For example, the resource on which the RSSI is not measured may be a resource on a transmission slot of the first terminal device.

Alternatively, the number of resources whose RSSI measurement value does not exceed the second threshold may be the sum of the number of resources whose RSSI measurement value is lower than or equal to the second threshold and the number of resources whose RSSI is not measured in the first CR window, or the number of resources whose RSSI measurement value does not exceed the second threshold may be the sum G' of the number of resources whose RSSI measurement value is lower than or equal to the second threshold and the number of resources whose RSSI is not measured in the resource pool.

Alternatively, the number of resources for which the RSSI measurement value does not exceed the second threshold may be the total number of resources D1 within the first CR window minus the number of resources G for which the RSSI measurement value exceeds the second threshold, that is, G' =d1-G.

The resources occupied by the first communication system include resources carrying SL information and having an RSSI measurement value exceeding a second threshold, or resources carrying SL information among the resources having an RSSI measurement value exceeding the second threshold, or resources having an RSSI measurement value exceeding the second threshold among the resources carrying SL information. Alternatively, the resources occupied by SL may be understood as resources that carry SL information in the first CR window and the RSSI measurement value exceeds the second threshold, or resources that carry SL information in the first CR window and the RSSI measurement value exceeds the second threshold in the SL resource pool. Correspondingly, the number of resources G1 occupied by SL is the number of resources G1 carrying SL information in the first CR window and the RSSI measurement value exceeds the second threshold, or the number of resources G1 occupied by SL is the number of resources G1 carrying SL information in the first CR window and the RSSI measurement value exceeds the second threshold in the SL resource pool.

The manner in which the terminal device determines the resource carrying the SL information may be referred to the description in step 801, and will not be described herein.

The resources occupied by the second communication system include resources which do not carry SL information and whose RSSI measurement value exceeds a second threshold, or resources which do not carry SL-U information among the resources whose RSSI measurement value exceeds the second threshold. Optionally, the resources occupied by the second communication system include resources that do not carry SL information in the first CR window and the RSSI measurement value exceeds the second threshold, or include resources that do not carry SL information in the first CR window and the RSSI measurement value exceeds the second threshold in the SL resource pool.

Optionally, the resources occupied by the second communication system include at least any one of the following resources: the preamble sequence of the second communication system is associated with resources, resources indicated by control information of the second communication system, resources indicated by COT indication information of the second communication system, resources indicated by COT sharing information of the second communication system, and resources indicated by sequence of the second communication system. Alternatively, the resources that do not carry SL information include resources that do not satisfy the judgment condition of the resources that carry SL information.

Optionally, the resources occupied by the second communication system include resources that carry the second communication system information in the first CR window and the RSSI measurement value exceeds the second threshold value, or the resources occupied by the second communication system include resources that carry the second communication system information in the first CR window and the RSSI measurement value exceeds the second threshold value in the resource pool.

Optionally, the number of resources G2 is the number of resources G whose RSSI measurement value exceeds the second threshold minus the number of resources G1 carrying SL information whose RSSI measurement value exceeds the second threshold. That is, g2=g—g1.

Optionally, the number of resources G2 is the number of resources G whose RSSI measurement exceeds the second threshold minus the number of resources G1 occupied by SL. That is, g2=g—g1.

Optionally, the number of resources G1 carrying SL information and having an RSSI measurement value exceeding the second threshold, the number of resources G2 occupied by the second communication system, and the number of resources G having an RSSI measurement value exceeding the second threshold satisfy the relationship: at least any one of g=g1+g2, g1=g-g2, g2=g-G1.

Optionally, the number of resources G1 occupied by SL, the number of resources G2 occupied by the second communication system, and the number of resources G whose RSSI measurement value exceeds the second threshold satisfy the relationship: at least any one of g=g1+g2, g1=g-g2, g2=g-G1.

Optionally, the number of resources G2 is the total number of resources D1 in the first CR window minus the number of resources G' whose RSSI measurement value does not exceed the second threshold value and the number of resources G1 occupied by SL. That is, g2=d1-G' -G1.

Optionally, the number of resources G2 is the total number of resources D minus the number of resources G' whose RSSI measurement value does not exceed the second threshold value and the number of resources G1 carrying SL information whose RSSI measurement value exceeds the second threshold value. That is, g2=d-G' -G1.

Optionally, the number of resources G, RSSI measured by RSSI exceeding the second threshold does not exceed the number of resources G' of the second threshold, and the total number of resources D satisfies the relationship: d=g+g ', g=d-G ', G ' =d-G.

Optionally, the number of resources G1 occupied by SL-U and the RSSI measurement value exceeds the second threshold, the number of resources G2 occupied by the second communication system and the RSSI measurement value exceeds the second threshold, the number of resources G' whose RSSI measurement value does not exceed the second threshold, and the total number of resources D satisfy the relationship: d=g1+g2+g'.

Optionally, the number of resources G1 occupied by SL-U and the RSSI measurement value exceeds the first threshold, the number of resources G2 occupied by the second communication system and the RSSI measurement value exceeds the first threshold, the number of resources G 'whose RSSI measurement value does not exceed the first threshold, the number of resources G'2 of non-measured RSSI, and the total number of resources D satisfy the relationship: d=g1+g2+g' +g2.

Optionally, the number of resources G2 is a number of resources G2 occupied by the second communication system in the first CR window and the measured RSSI value exceeds the second threshold, or the number of resources G2 is a number of resources G2 occupied by the second communication system in the first CR window and the measured RSSI value exceeds the second threshold in the resource pool.

The resources transmitted by the first terminal device include resources within the first CR window, or the resources transmitted by the first terminal device include resources within the first CR window within the resource pool. Optionally, the number of resources E is the number of resources transmitted by the first terminal device in the first CR window, or the number of resources E is the number of resources transmitted by the first terminal device in the first CR window in the resource pool.

The resources transmitted by the first terminal device include, for example, resources within the second measurement window. The number E of resources is the number of resources transmitted by the first terminal device within the first CR window. One possible implementation may determine the number of resources E transmitted by the first terminal device based on priority or CAPC. For example, for transmissions with priority levels 1 to 8, the number of resources transmitted by the first terminal device is { E }, respectively ₁ ,E ₂ ,E ₃ ,…,E ₇ -a }; for another example, for CAPC transmissions of 1 to 4, the number of resources transmitted by the first terminal device is { E }, respectively _i ,E _ii ,E _iii ,E _iv }。

The first terminal apparatus is authorized to use the resources belonging to selected sidelink grant. The resources authorized by the first terminal device are a set of resources selected by the MAC layer of the first terminal device. The first terminal device may transmit SL information using the resources in the set of resources. Optionally, the resource authorized by the first terminal device is a resource in the second CR window, or the resource authorized by the first terminal device is a resource in the second CR window in the resource pool. Optionally, the number of resources E is the number of resources authorized by the first terminal device in the second CR window, or the number of resources E is the number of resources authorized by the first terminal device in the second CR window in the resource pool.

One possible implementation may determine the number of resources F authorized by the first terminal device based on priority or CAPC. For example, for transmissions with priority levels 1 to 8, the number of resources authorized by the first terminal device is { F }, respectively ₁ ,F ₂ ,F ₃ ,…,F ₇ -a }; for another example, for a CAPC transmission of 1 to 4, the number of resources authorized by the first terminal device is { F _i ,F _ii ,F _iii ,F _iv }。

In one possible way, the terminal device may determine the channel occupancy state within the third measurement window. It should be understood that the channel occupancy status may be characterized by the channel occupancy, or otherwise referred to, and embodiments of the present application are not limited thereto.

The method for determining the channel occupancy state in the first measurement window by the terminal device is as follows:

method 1: determining the channel occupancy status of the first communication system within the first CR measurement window according to the relationship:

Z＝(E+F)÷[D-(G-G1)],

wherein Z represents a channel occupancy state of the first communication system in the second measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units whose RSSI measurement value is larger than the second threshold value in the second measurement window, G1 represents a number of resource units occupied by the first communication system in the second measurement window, or G1 represents a resource which carries the first communication system information in the second measurement window and whose RSSI measurement value exceeds the second threshold value.

The number of resource units transmitted by the first terminal device in the second measurement window may also be understood as a resource carrying SL information of the first terminal device, where the SL information includes at least one of PSCCH, PSSCH, PSFCH, S-SSB and CPE. Alternatively, the number of resource units transmitted by the first terminal device in the third measurement window may be understood as a resource in the initial COT of the first terminal device, where the resource in the COT includes a resource for carrying SL information of the first terminal device and/or a resource shared to other terminal devices for transmitting SL information.

The first terminal device is authorized resource units within the fourth measurement window, the authorized resources being resources belonging to the selected sideline resource (selected sidelink grant). The resources authorized by the first terminal device may be a set of resources selected by the MAC layer of the first terminal device, and the first terminal device may transmit SL information using resources in the set of resources. The resource unit authorized by the first terminal device in the fourth measurement window may be understood as a resource unit authorized by the first terminal device in the fourth measurement window, such as a resource in a COT authorized by the first terminal device in the fourth measurement window, where the resource in the COT includes a resource carrying SL information authorized for transmission by the first terminal device and/or a resource authorized for transmission by sharing SL information to other terminal devices. For another example, the fourth measurement window carries the resource of the SL information of the first terminal apparatus. Optionally, the SL information includes at least one of PSCCH, PSSCH, PSFCH, S-SSB, CPE.

In the calculation process, the number of resources occupied by the second communication system is excluded from the denominator. In other words, the channel occupancy state of SL is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F, and is a proportion of the number of resources not occupied by the second system in the third measurement window. In other words, the channel occupancy state of SL is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F divided by the number of resources remaining in the CR measurement window excluding the resources occupied by the second communication system.

The number of resources G2 occupied by the second communication system may be determined by the number of resources G and the number of resources G1 occupied by SL when the RSSI measurement value exceeds the second threshold. Such as g2=g-G1.

The number of resources D-G2 in the second measurement window excluding the resources occupied by the second communication system may be determined according to the number of resources G1 occupied by the SL, the number of resources G' where the measured value of RSSI does not exceed the first threshold and/or the measured value of RSSI does not exceed the first threshold, and the total number of resources D2 in the second CR window. For example D-g2=g1+g' +d2.

Optionally, the method for calculating the channel occupancy state may be further modified to: z= (e+f)/(D-G2) or z= (e+f)/(g1+g' +d2).

Method 2: determining the channel occupancy state of the first communication system within the third measurement window according to the following relationship:

Z＝(E+F)÷(D-G+G1-δ)，

Where δ may represent the number of resource units authorized by the second communication system within the fourth measurement window, and may be calculated based on the number of resources other than the number of resource units authorized by the first communication system within the fourth measurement window. Alternatively, δ is a value that is preconfigured to the first terminal apparatus or network-configured to the first terminal apparatus.

Delta may also be understood as the number of resources authorized by the second communication system in the third measurement window or the number of resources authorized by the second communication system in the fourth measurement window.

The calculation process is equivalent to the fact that the number of resources G2 occupied by the second communication system and the number of authorized resources delta of the second communication system are excluded from denominators.

The calculation method may also be understood that the channel occupation state of the SL is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F, and accounts for the proportion of the number of resources not occupied by the second communication system and not authorized by the second communication system in the CR measurement window. Alternatively, the channel occupancy state of the SL is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F divided by the remaining number of resources D-G2- δ in the CR measurement window excluding the second communication system from being occupied and authorized by the second communication system.

One possible implementation, the number of resources delta authorized by the second communication system may be a preconfigured or network device configured value. For example, the number of resources δ authorized by the second communication system is a value in a list of preconfigured or network configurations. Delta is an integer.

Another possible implementation may be to determine the number of resources δ authorized by the second communication system based on priority or CAPC. For example, for transmissions with priority levels 1 to 8, the number of resources authorized by the second communication system is { delta }, respectively ₁ ,δ ₂ ,δ ₃ ,…,δ ₇ -a }; for another example, for a CAPC transmission of 1 to 4, the number of resources authorized by the second communication system is { respectivelyδ _i ,δ _ii ,δ _iii ,δ _iv }。

The following describes several ways of calculating the number of authorized resources δ of the second communication system:

The number of authorized resources δ of the second communication system may be determined according to the number of resources G2 occupied by the second communication system, the total number of resources D1 in the first CR window, and the total number of resources D2 in the second CR window. For example δ=g2×d2+.d1.

The number of authorized resources δ of the second communication system may be determined according to the number of resources G2 occupied by the second communication system, the number of time slots a in the first CR window, and the number of time slots d+1 in the second CR window. For example δ=g2× (d+1)/(a).

The number of resources G2 occupied by the second communication system is determined according to the number of resources G, the RSSI measured value of which exceeds the first threshold value, and the number of resources G1 occupied by SL. For example g2=g-G1.

The number of resources D-G2 in the CR measurement window excluding the resources occupied by the second communication system may be determined according to the number of resources G1 occupied by the SL, the number of resources G' for which the measured value of RSSI does not exceed the first threshold and/or the measured RSSI, and the total number of resources D2 in the second CR window. For example D-g2=g1+g' +d2.

The method 2 can also be modified as follows: (E+F)/(D-G2-delta) or (E+F)/(G1 +D2+G' -delta).

Method 3: determining the channel occupancy state of the first communication system within the third measurement window according to the following relationship:

Z＝(E+F)÷[D-γ×(G-G1)]

wherein Z represents a channel occupancy state of the first communication system in the third measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units whose RSSI measurement value is greater than the second threshold in the second measurement window, G1 represents a number of resource units occupied by the first communication system in the second measurement window, and γ is a scale factor.

The sum of the number of resources occupied by the second communication system and authorized is γxg2 may be determined based on the product of the number of resources occupied by the second communication system and the scaling factor.

The calculation mode is equivalent to the sum gamma×g2 of the number of resources occupied by the second communication system and authorized by the denominator.

In other words, the channel occupancy state of SL is the ratio of the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F to the number of resources not occupied by the second communication system and not authorized by the second communication system in the CR measurement window. Or, the channel occupation state of the SL is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F divided by the remaining number of resources D- γ×g2 in the CR measurement window excluding the authorization of the second communication system, which is occupied by the second communication system.

One possible implementation, the scaling factor γ is a preconfigured or network configured value. For example, the scaling factor γ is a value in a list of preconfigured or network configurations. Another possible implementation where γ is 1 or more, the scaling factor γ may be determined based on priority or CAPC. For example for transmissions with priority 1 to 8, the second communication systemThe number of the authorized resources of the system is { gamma }, respectively ₁ ,γ ₂ ,γ ₃ ,…,γ ₇ -a }; for another example, for a CAPC 1 to 4 transmission, the number of resources authorized by the second communication system is { gamma }, respectively _i ,γ _ii ,γ _iii ,γ _iv }。

The following describes several ways of scaling factor calculation:

the scaling factor γ may be determined from the number of resources D within the CR measurement window, the total number of resources D1 within the first CR window. For example γ=d≡d1.

The scaling factor γ may be determined based on the number of slots b in the CR measurement window, the number of slots a in the first CR window. For example γ= (a+b+1)/(a).

Optionally, the method 3 may be further modified into the following calculation method: z= (E+F)/(D- γXG2) or (E+F)/(D- γX (D-D2-G1-G')).

The above manner is applicable to a scenario where a first communication system and a second communication system exist simultaneously, for example, a scenario where a channel is dynamically accessed. The way in which the channel occupancy state is calculated in a scenario in which only the first communication system is operating is described below.

Optionally, the channel occupancy state of the first communication system may be determined according to a ratio of a sum of the number of resource units transmitted by the first terminal device in the third measurement window and the number of authorized resource units in the third measurement window to the number of resource units in the third measurement window, and a second offset and/or a second coefficient, where a value of the second offset and/or the second coefficient is predefined, preconfigured or network configured. Optionally, the second offset and/or the second coefficient has a value related to the ratio of the idle time to the total number of resources in the measurement window.

The number of the resource units transmitted by the first terminal device in the second measurement window, the number of the authorized resource units in the fourth measurement window, and the number of the resource units in the third measurement window may refer to the foregoing description, and will not be repeated here.

As can be seen in conjunction with fig. 5, in the semi-static channel access scenario, the duration of the CR measurement window includes a period of idle time, resulting in inaccurate measurement results.

Thus, in one possible way, the second offset or the second coefficient is used to adjust the measurement result.

Illustratively, the CR measurement is the CR measurement + offset ', or the CR measurement is the CR measurement times α ', or the CR measurement is the CR measurement divided by β '.

It is also understood that the CR measurement is the CR actual measurement + offset ', or the CR measurement is the CR actual measurement times a ', or the CR measurement is the CR actual measurement divided by β '.

Optionally, the CR measurement value is a ratio of a sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F to the number of resources in the CR measurement window. Alternatively, the CR measurement value is the sum of the number of resources E transmitted by the first terminal device and the number of authorized resources F divided by the number of resources D in the CR measurement window. I.e., the CR measurement is the ratio of e+f to D, or the CR measurement is the value of e+f divided by D.

That is, the above CR measurement result may satisfy the following relationship:

Z＝[(E+F)÷D]+offset’，

or,

Z＝[(E+F)÷D]*α’，

or,

Z＝[(E+F)÷D]÷β’，

offset ' is the second Offset, and α ' or β ' is the second coefficient.

Optionally, the value range of the offset' is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of offset 'is a fixed value, e.g., offset' =0.05. Optionally, the value of offset 'is at least 1 value configured in the list, e.g., at least 2 values in {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1} the value of configured or preconfigured offset' is 0.05.

Optionally, α' is a value with a value range greater than or equal to 1. One possible implementation, the value of α 'is a fixed value, e.g., α' =1.05. Alternatively, the value of α 'is at least 1 value configured in the list, e.g., at least 2 values in {1,1.01,1.02,1.03,1.04,1.05,1.06,1.07,1.08,1.09,1.1} the value of configured or preconfigured α' is 1.05.

Optionally, the value range of β' is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of β 'is a fixed value, e.g., β' =0.95. Alternatively, the value of β 'is at least 1 value configured in the list, e.g., at least 2 values in {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1} the value of configured or preconfigured β' is 0.95.

In another possible way, the first coefficient is used to adjust the number of resources in the CR measurement window.

The third measurement window illustratively includes resources within each transmission period T. The first coefficient is M'. The number of resources D in the CR measurement window is the number of transmission resources M' in the CR measurement window. Optionally, the value range of M' is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of M 'is a fixed value, e.g., M' =0.95. Alternatively, the value of M 'is at least 1 value configured in the list, e.g., at least 2 values in {0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1} the value of configured or preconfigured M' is 0.95.

In yet another possible manner, the first coefficient is used to adjust the size of the CR measurement window.

Illustratively, the CR measurement window includes resources located at the previous M' in the time domain within each transmission period T, or the CR measurement window does not include resources of the idle time. Optionally, the value range of M' is more than or equal to 0 and less than or equal to 100%. One possible implementation, the value of M 'is a fixed value, e.g., M' =95%. Optionally, the value of M 'is at least 1 value configured in the list, e.g., the list is at least 2 of {50%,55%,60%,65%,70%,75%,80%,85%,90%,95%,100% }, the value of configured or preconfigured M' is 95%. Alternatively, the value of M' is determined from the value of the transmission period T,

for exampleOr->Converted to a percent value.

As another example, the CR measurement window includes resources located in the time domain at the previous min { mxt, T-0.1} ms within each transmission period T. Optionally, the value range of M' is greater than or equal to 0 and less than or equal to 1. One possible implementation, the value of M 'is a fixed value, e.g., M' =0.95. Alternatively, the value of M 'is at least 1 value configured in the list, e.g., at least 2 of the list {0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1}, the value of configured or preconfigured M' is 0.95.

Optionally, each transmission period T is a transmission period within 1 or 2 radio frames. The period T takes at least one value of {1,2,2.5,4,5, 10} ms. Wherein, the 2 radio frames comprise 20/T transmission periods, or the 1 radio frames comprise 10/T transmission periods.

In a further possible manner, the first coefficient is used to adjust the number of resources E transmitted by the first terminal device and the number of resources F authorized by the first terminal device.

In one example, the number of resources E transmitted by the first terminal device is the actual number of resources E ' transmitted by the first terminal device plus an offset, or the actual number of resources E ' transmitted by the first terminal device is multiplied by α ', or the actual number of resources E ' transmitted by the first terminal device is divided by β '.

In yet another example, the number of resources F authorized by the first terminal device is the actual number of resources F ' authorized by the first terminal device plus offset, or the actual number of resources F ' authorized by the first terminal device is multiplied by α ', or the actual number of resources F ' authorized by the first terminal device is divided by β '.

The manner in which CR limit is determined is given below.

Mode 1: adjusting CRlimit according to offset

According to sigma _i≥k CR(i)≤CR _Limit (k) +offset congestion control. Alternatively, the offset is a value equal to or greater than 0 and equal to or less than 1. Optionally, the value of offset is a fixed value. Optionally, the value of the offset is at least 1 value configured in the offset list. One possible implementation may determine the value of the offset based on priority or CAPC. For example, for transmissions with priority 1 to 8, the values of the offset offsets are { offset, respectively ₁ ，offset ₂ ，offset ₃ ，...，offset ₇ -a }; for CA, for examplePC is a transmission of 1 to 4, and the values of the offset are { offset, respectively _i ，offset _ii ，offset _iii ，offset _iv }。

Mode 2: adjusting CRlimit according to scale factor θ offset

According to sigma _i≥k CR(i)≤θ×CR _Limit (k) And (5) congestion control. Optionally, the scaling factor θ is a value of 1 or more. Optionally, the scale factor θ has a constant value. Optionally, the value of the scaling factor θ is at least 1 value configured in the scaling factor list. One possible implementation may determine the value of the scaling factor θ based on priority or CAPC. For example, for transmissions with priority levels 1 to 8, the values of the scaling factors θ are { θ }, respectively ₁ ，θ ₂ ，θ ₃ ，...，θ ₇ -a }; for another example, for a CAPC transmission of 1 to 4, the scale factors θ have values of { θ }, respectively _i ，θ _ii ，θ _iii ，θ _iv }。

In summary, determining the channel occupancy state requires determining the number of resources E occupied by the first terminal device and the number of resources F authorized by the first terminal device, which are different computing modes as denominators in the computing modes. That is, the calculation of the channel occupancy state may be for a certain terminal device.

Optionally, this embodiment may further include the steps of:

step 1003: it is determined whether the channel measurement result satisfies a CR condition.

Step 1003 may be performed by the terminal device.

Alternatively, the CR condition is that the sum of CR is less than CR limit, e.g. Σ _i≥k CR(i)≤CR _Limit (k) A. The invention relates to a method for producing a fibre-reinforced plastic composite Wherein i is the priority of SL information, the terminal device transmits the SL information and needs to meet the CR condition of any k value of i.gtoreq.k, and the range of values of i and k is an integer from 1 to 8. The CR estimated for time unit m-N is used for congestion control of the transmission of SL information for time unit m, where N is the processing time of the congestion control. The terminal device may satisfy the CR condition by transmitting or not transmitting certain SL information.

Optionally, in combination with the determination of CR limit in step 1002, the CR condition may be at least one of:

∑ _i≥k CR(i)≤CR _Limit (k)+Offset，∑ _i≥k CR(i)≤θ×CR _Limit (k)，∑ _i≥k CR(i)≤CR _Limit (k)

i is a priority value corresponding to the first SL information, k is a priority value smaller than or equal to i, the values of i and k are integers from 1 to 8, offset is an offset, CR (i) is a channel occupation state with a measured priority value of i, CR _Limit (k) Is a channel occupancy state limit with priority value k.

One possible implementation is: the first terminal device may determine whether to transmit SL information in time unit m based on the CR estimated in time unit m-N. Wherein the time unit m is the time unit of channel access, or the time unit m is the time unit of the first access channel after LBT is successful. And N is the congestion control processing time.

Another possible implementation: the first terminal device may determine whether to start channel access at time unit m based on CR estimated at time unit m-N.

Optionally, the channel access comprises a first type of channel access and/or a second type of channel access. Optionally, the priority i is associated with a cap which performs a priority of the first type of channel access for the first terminal device.

Yet another possible implementation, a CR condition may be used to determine whether COT sharing.

In one example, the COT sharing includes a first terminal device initiating a first COT that is shared by a second terminal device. The second terminal device transmits the second SL information within the first COT or the second terminal device will transmit the second SL information within the first COT. In other words, the COT sharing shares the same COT for service information of different terminal apparatuses.

Alternatively, the first terminal device determines whether to allow the second SL information of the second terminal device to be transmitted within the first COT according to whether the CR estimated by the time unit m-N satisfies a CR condition.

Alternatively, the first terminal device determines whether to instruct the second terminal device that the second SL information is transmitted within the first COT according to whether the CR estimated by the time unit m-N satisfies the CR condition.

Alternatively, the second terminal apparatus determines whether to transmit the second SL information within the first COT according to whether CR estimated by the time unit m-N satisfies a CR condition. The second SL information may be transmitted over the time unit m when the CR condition is satisfied. The priority in SCI of the second SL information is i.

Alternatively, the second SL information may transmit information at the time unit m when the CR condition is satisfied. In yet another example, the COT sharing includes a first terminal device initiating a first COT within which the first terminal device transmits. The first terminal device transmits the second SL information within the first COT or the first terminal device will transmit the second SL information within the first COT. In other words, the COT sharing shares the same COT for different service information of the first terminal apparatus.

Alternatively, the first terminal device determines whether the second SL information is transmitted within the first COT according to whether CR estimated by the time unit m-N satisfies a CR condition. The second SL information may be transmitted in time unit n when the CR condition is satisfied. Optionally, the priority in SCI of the second SL information is i.

In this embodiment, when calculating the channel occupancy state, the sidestream terminal device considers the occupancy situation of other systems on the channel, or considers the influence of idle time in the measurement period on the channel occupancy state, thereby improving the accuracy of channel measurement.

The resources (resource units) and associated RSSI measurements referred to in the embodiments of the present application are described below.

The resource units may be predefined or configured, and the embodiments of the present application are not limited to this. The resource unit may be a count unit and the resource unit may include a resource sub-unit. For example, a resource unit may be composed of resource sub-units.

The resource unit may be a time domain unit or a frequency domain unit. The following is a detailed description.

When the resource unit is a time domain unit:

the resource unit may be at least one of a slot (slot), a symbol (symbol), a perceived slot (sensing slot), or a Channel Occupation Time (COT). One possible implementation may pre-configure or network configure the resource units to be at least one of time slots, symbols, perceived time slots, channel occupation times. For example, the resource unit may be preconfigured or configured by the network to be at least one of a time slot, a symbol, a perceived time slot, and a channel occupation time according to the information type of the resource bearer. For example, for SL information, the resource units are time slots. For another example, for the second communication system information, the resource unit is a perceived time slot.

Correspondingly, the resource sub-units may be time units, such as at least one of time slots, symbols, perceived time slots, channel occupation times.

Illustratively, the time subunit is a symbol. The RSSI measurement of a resource unit is a linear average of the sum of the received powers of the symbols belonging to that resource unit. The symbols include symbols carrying PSCCH, PSCCH.

Illustratively, the time subunit is a perceived time slot. The RSSI measurement of a resource unit is a linear average of the sum of the received powers of the perceived time slots belonging to that resource unit. The perceived time slots include perceived time slots carrying SL information and/or perceived time slots carrying different system information.

One possible implementation 1, the measured value of rssi is a linear average of the sum of the received powers (received powers) of the time subunits comprised by the resource units. In other words, the RSSI of the resource unit is determined from the linear average of the sum of the received powers of all time subunits that the resource unit comprises. Alternatively, the time subunit may be at least one of a time subunit carrying PSCCH, a time subunit carrying PSSCH, a time subunit carrying PSFCH, a time subunit carrying AGC, and a time subunit carrying CPE.

Optionally, the time subunit may be preconfigured or network configured according to the information type carried by the resource, and is at least any one of a time slot, a symbol, a perceived time slot, and a channel occupation time. For example, for SL information, the pre-configured or network configured time subunits are symbols. For another example, for heterogeneous system information, the pre-configured or network configured time subunits are perceived time slots.

Another possible implementation 2, the resource unit includes L time subunits, and the RSSI measurement value of the resource is determined using a linear average of the sum of the RSSI received powers of the U time subunits. Wherein U is less than or equal to L. In other words, the RSSI of the resource unit is determined from a linear average of the sum of the received powers of the part of the time subunits that the resource unit comprises. Optionally, the U time subunits are time subunits whose received power exceeds a first threshold (or a second threshold).

The RSSI measurement of the resource may be determined according to at least any one of the methods of implementation 1 and implementation 2 described above. Alternatively, the RSSI measurement of the resource may be determined by at least any one of the methods of preconfiguration or network configuration mode 1 and mode 2. Or, determining the RSSI measured value of the resource according to at least any one of the pre-configuration of the information type carried by the resource or the network configuration mode 1 and mode 2. Optionally, the information type of the resource bearer includes the resource bearer SL information and/or the resource bearer different system information.

The resource unit includes L time subunits, wherein the RSSI measurements of the U time subunits are greater than a first threshold (or a second threshold), and the RSSI measurements of the P time subunits do not exceed the first threshold (or the second threshold). Alternatively, L, U, P are integers satisfying u+p=l. The manner of determining whether the RSSI of the resource unit is greater than the first threshold (or the second threshold) is at least any one of the following manners:

a) The number of time subunits U whose RSSI measurement value is greater than the first threshold (or the second threshold) is greater than and/or equal to the number of time subunits P whose RSSI measurement value does not exceed the first threshold (or the second threshold), the RSSI of the resource exceeds the first threshold (or the second threshold). That is, for U equal to or greater than P, the RSSI of the resource exceeds the first threshold (or the second threshold).

b) The number of time subunits U having an RSSI measurement greater than the first threshold (or the second threshold) is greater than and/or equal to the first value (i.e., the third threshold), the RSSI of the resource exceeds the first threshold (or the second threshold). The first value is preconfigured or network configured. That is, the RSSI of the resource exceeds the first threshold (or the second threshold) for U to be equal to or greater than the first value.

c) The ratio of the number of time subunits U with the RSSI measurement value greater than the first threshold (or the second threshold) to the total number of time units l=u+p in the resource is greater than the first proportional threshold (i.e. the fourth threshold), and the RSSI of the resource exceeds the first threshold (or the second threshold). That is, for U/L equal to or greater than the first proportional threshold, the RSSI of the resource exceeds the first threshold (or the second threshold); alternatively, for U/v (u+p) equal to or greater than the first proportional threshold, the RSSI of the resource exceeds the first threshold (or the second threshold). The first proportional threshold is preconfigured or network configured.

d) The difference between the total number of time subunits and the number U of time subunits with RSSI measurement value larger than the first threshold (or the second threshold) is smaller than or equal to the fifth threshold, and the RSSI of the resource exceeds the first threshold (or the second threshold). That is, for L-U less than or equal to the fifth threshold, the RSSI of the resource exceeds the first threshold (or the second threshold).

The RSSI measurement of the resource may be determined according to at least any of the methods a) -d) above. Alternatively, the RSSI measurements of the resources may be determined by at least any one of the pre-configuration or network configuration a) -d). Or, determining the RSSI measurement value of the resource according to at least any one of the information type pre-configuration or the network configuration a) -d) carried by the resource. Optionally, the information type of the resource bearer includes the resource bearer SL information and/or the resource bearer different system information.

Optionally, the first threshold or the second threshold is an energy detection threshold (ED threshold). The RSSI measurement is greater than a first threshold, and the time unit is busy. The RSSI measurement is not greater than a first threshold, the time unit is idle. The first value and the first proportional threshold may be predefined, configured or indicated, which is not limited in the embodiment of the present application.

When the resource unit is a frequency domain unit:

the resource unit may be at least one of a subchannel, a subchannel of consecutive RBs (configured RB-based sub-channel), a subchannel of interleaved RBs (interleaved RB-based sub-channel), a channel (channel), an RB set (RB set), a resource pool (resource pool), a guard band (guard band), a Resource Block (RB), and a resource unit (RE). One possible implementation may pre-configure or network configure the resource elements as at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, a resource element. For example, the resource elements may be preconfigured or network-configured according to the information type of the resource bearer to be at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, and REs. For example, for SL information, the resource elements are subchannels of interleaved RBs. For another example, for the second communication system information, the resource elements are subchannels of consecutive RBs.

Correspondingly, the resource sub-unit may be a frequency domain sub-unit, such as at least one of a sub-channel, a sub-channel of consecutive RBs, a sub-channel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, a resource unit.

The frequency domain subunits are illustratively subchannels. The RSSI measurement of a resource unit is a linear average of the sum of the received powers of the sub-channels belonging to that resource unit. The sub-channel includes symbols carrying PSCCH, PSCCH.

The frequency domain sub-unit is illustratively a resource block. The RSSI measurement for a resource unit is a linear average of the sum of the received powers of the resource blocks belonging to that resource unit. The resource blocks include perceived time slots carrying SL information and/or resource blocks carrying different system information.

One possible implementation a, the measured value of RSSI is a linear average of the sum of the received powers (received powers) of the frequency domain subunits comprised by the resource unit. In other words, the RSSI of the resource unit is determined from a linear average of the sum of the received powers of all frequency domain subunits that the resource unit comprises. Alternatively, the frequency domain subunit may be at least one of a frequency domain subunit carrying PSCCH, a frequency domain subunit carrying PSSCH, a frequency domain subunit carrying PSFCH, a frequency domain subunit carrying AGC, and a frequency domain subunit carrying CPE.

In another possible implementation B, the resource unit includes L frequency domain subunits, and the RSSI measurement value of the resource is determined using a linear average of the sum of the RSSI received powers of the U first frequency domain subunits. Wherein U is less than or equal to L. In other words, the RSSI of the resource unit is determined from a linear average of the sum of the received powers of the part of the frequency domain subunits that the resource unit comprises. Optionally, the U frequency domain subunits are frequency domain subunits having a received power exceeding a first threshold.

The RSSI measurements for the resources may be determined according to at least any one of the methods of implementation a and implementation B described above. Alternatively, the RSSI measurement of the resource may be determined by at least any one of the methods of preconfiguration or network configuration mode 1 and mode 2. Or, determining the RSSI measured value of the resource according to at least any one of the pre-configuration of the information type carried by the resource or the network configuration mode 1 and mode 2. Optionally, the information type of the resource bearer includes the resource bearer SL information and/or the resource bearer different system information.

The manner of determining whether the RSSI of a certain resource unit is greater than the first threshold may refer to the description of the time domain portion, and the "time subunit" may be replaced by the "frequency domain subunit", which is not described herein.

In SL for R16, the measured granularity of the measured RSSI is the symbol (15 kHz SCS is about 71.35 us), the time domain granularity of the resource is the slot (15 kHz SCS is 1 ms); in the unlicensed band, the granularity of measurement is the perceived time slot (9 us). In this scheme, the measurement granularity of RSSI measurement, CR measurement, CBR measurement, and unlicensed spectrum are aligned. The accuracy of RSSI measurement is improved, and the resource occupation condition and/or the resource busy condition can be accurately reflected.

It should be understood that the above schemes mainly describe the relevant steps of the terminal device, and the network device may configure and/or preconfigure the various thresholds, parameters, and adjustment factors in the present application for the terminal device. For example, the network device may configure and/or pre-configure at least one of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, the first offset, the first coefficient α, the adjustment factor δ, the scaling factor γ, and so on for the terminal device. Or the network device may configure and/or pre-configure at least one of a time domain granularity of the resource unit, a granularity of the time sub-unit, a frequency domain granularity of the resource unit, a granularity of the frequency domain sub-unit, and so on for the terminal device. Still alternatively, the network device may configure and/or preconfigure the manner in which the RSSI measurements of the resources are determined for the terminal device, such as at least one of possible implementation 1, possible implementation 2, possible implementation a, possible implementation B, and so on.

For example, the network device may configure the third threshold for the terminal device. Alternatively, the network device may transmit, to the terminal device, instruction information for instructing the third threshold value. The embodiments of the present application are not limited in this regard. It should be understood that the third threshold is only one example of the content of the network device configuration, and is not limited thereto.

It should also be understood that LBT is taken as an example of a way for the terminal device to listen to the channel and access the channel in the above embodiments, but the embodiments of the present application are not limited thereto. For example, the terminal device may listen to the channel, or may access the channel after a duration indicated by the network device, or predefined by the network device and the terminal device, or autonomously determined by the terminal device.

It should also be appreciated that the SL communication system is exemplified in the above embodiments, but this is not a limitation. For example, the methods of the embodiments described above may also be applied to SL-U communication systems, and so on.

The various embodiments described herein may be separate solutions or may be combined according to inherent logic, which fall within the scope of the present application. It should be understood that the steps of the foregoing embodiments are merely for clearly describing the technical solutions of the embodiments, and the execution sequence of the steps is not limited.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are described from the perspective of interaction between the respective devices. In order to implement the functions in the methods provided in the embodiments of the present application, the network device or the terminal device may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

The division of the modules in the embodiment of the present application is schematic, which is merely a logic function division, and other division manners may be implemented in practice. In addition, each functional module in the embodiments of the present application may be integrated in one processor, or may exist alone physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

The measuring device provided in the embodiment of the present application is described in detail below with reference to fig. 12 to 13. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not described may be referred to the above method embodiments, which are not repeated herein for brevity.

As with the above concept, as shown in fig. 12, the embodiment of the present application provides a measurement apparatus 1200 for implementing the functions of the terminal apparatus in the above method. For example, the apparatus may be a software module or a system on a chip. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. The apparatus 1200 may include: a processing unit 1210, and a communication unit 1220.

In this embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a transmitting unit and/or a receiving unit, which are configured to perform the steps of transmitting and receiving by the terminal device in the foregoing method embodiment, respectively.

The communication unit may also be referred to as a transceiver, transceiving means, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc. Alternatively, the device for implementing the receiving function in the communication unit 1220 may be regarded as a receiving unit, and the device for implementing the transmitting function in the communication unit 1220 may be regarded as a transmitting unit, i.e., the communication unit 1220 includes a receiving unit and a transmitting unit. The communication unit may also be referred to as a transceiver, interface circuit, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

The measurement apparatus 1200 performs the functions of the network apparatus in the flow shown in any one of fig. 8 to 11 in the above embodiments:

the communication unit may be configured to send downlink control information and/or RRC signaling.

The communication unit may also be used to configure thresholds, adjustment factors, scaling factors, etc.

The processing unit may be used to pre-configure side-uplink unlicensed resources, etc.

The communication apparatus 1200 executes the functions of the terminal apparatus in the flow shown in any one of 8 to 11 in the above embodiments:

and the communication unit can be used for receiving downlink control information, RRC signaling and side-link control information and transmitting data.

The processing unit may be configured to parse the downlink control information and the side downlink control information, determine transmission resources, and determine a channel state, for example, determine a channel occupancy state and/or a channel busy state;

the processing unit may also be used to perform LBT procedures, etc.

The foregoing is merely an example, and the processing unit 1210 and the communication unit 1220 may also perform other functions, and the more detailed description may refer to the method embodiments shown in fig. 8 to 11 or the related descriptions in other method embodiments, which are not repeated herein.

Fig. 13 illustrates a measurement apparatus 1300 according to an embodiment of the present application, where the apparatus illustrated in fig. 13 may be an implementation of a hardware circuit of the apparatus illustrated in fig. 12. The communication device may be adapted to perform the functions of the terminal device or the network device in the above-described method embodiments in the flowcharts shown above. For ease of illustration, fig. 13 shows only the main components of the measuring device.

The measurement device 1300 may be a terminal device, and may implement the functions of the first terminal device or the second terminal device in the method provided in the embodiment of the present application. The communication apparatus 1300 may be an apparatus capable of supporting the first terminal apparatus or the second terminal apparatus to implement the corresponding function in the method provided in the embodiment of the present application. The measurement device 1300 may be a system-on-chip, among others. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. Specific functions can be seen from the description of the method embodiments described above.

The measurement device 1300 includes one or more processors 1310 for implementing or for supporting the communication device 1300 to implement the functions of the first terminal device or the second terminal device in the method provided in the embodiments of the present application. Reference is made specifically to the detailed description in the method examples, and details are not described here. Processor 1310, which may also be referred to as a processing unit or a processing module, may implement certain control functions. The processor 1310 may be a general purpose processor or a special purpose processor, etc. For example, it includes: a central processor, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and/or a neural network processor, etc. The central processor may be used to control the communications device 1300, execute software programs, and/or process data. The different processors may be separate devices or may be integrated in one or more processors, e.g., integrated on one or more application specific integrated circuits. It is to be appreciated that the processor in embodiments of the present application may be a central processing unit (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

Optionally, the measurement device 1300 includes one or more memories 1320 therein for storing instructions 1340 that can be executed on the processor 1310 to cause the communication device 1300 to perform the methods described in the method embodiments above. Memory 1320 is coupled to processor 1310. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 1310 may operate in conjunction with memory 1320. At least one of the at least one memory may be included in the processor. The memory 1320 is not necessary, and is illustrated with a broken line in fig. 13.

Optionally, the memory 1320 may also store data. The processor and the memory may be provided separately or may be integrated. In the embodiment of the present application, the memory 1320 may be a nonvolatile memory, such as a hard disk (HDD) or a Solid State Drive (SSD), or may be a volatile memory (volatile memory), for example, a random-access memory (RAM). The processor in embodiments of the present application may also be in flash memory, read-only memory (ROM), programmable ROM (PROM), erasable Programmable ROM (EPROM), electrically erasable programmable EPROM (EEPROM), registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or terminal device. The processor and the storage medium may reside as discrete components in a network device or terminal device.

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 implementing a memory function for storing program instructions and/or data.

Alternatively, the measurement apparatus 1300 may include instructions 1330 (sometimes also referred to as codes or programs), the instructions 1330 may be executed on the processor, so that the measurement apparatus 1300 performs the method described in the above embodiments. The processor 1310 may store data therein.

Optionally, the measurement device 1300 may also include a transceiver 1350 and an antenna 1360. The transceiver 1350 may be referred to as a transceiver unit, transceiver module, transceiver circuitry, transceiver, input-output interface, etc. for implementing the transceiver functions of the measurement device 1300 via the antenna 1360.

The processor 1310 and transceiver 1350 described herein may be implemented on an integrated circuit (integrated circuit, IC), analog IC, radio frequency integrated circuit (radio frequency identification, RFID), mixed signal IC, ASIC, printed circuit board (printed circuit board, PCB), or electronic device, among others. The measurement apparatus described herein may be implemented as a stand-alone device (e.g., a stand-alone integrated circuit, a mobile phone, etc.), or may be part of a larger device (e.g., a module that may be embedded in another device), and reference may be made specifically to the foregoing descriptions of the terminal device and the network device, which are not repeated herein.

Optionally, the measurement apparatus 1300 may further include one or more of the following: wireless communication modules, audio modules, external memory interfaces, internal memory, universal serial bus (universal serial bus, USB) interfaces, power management modules, antennas, speakers, microphones, input/output modules, sensor modules, motors, cameras, or displays, among others. It is to be appreciated that in some embodiments, the communications device 1300 may include more or fewer components, or some components may be integrated, or some components may be split. These components may be hardware, software, or a combination of software and hardware implementations.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can 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 and the equivalents thereof, the present application is intended to cover such modifications and variations.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A measurement method applied to an unlicensed spectrum communication system, the unlicensed spectrum communication system including a first communication system, characterized in that:

determining the number of resource units occupied by the first communication system in a first measurement window, wherein the number of the resource units occupied by the first communication system in the first measurement window is smaller than or equal to the number of the resource units with RSSI measured values larger than a first threshold value in the first measurement window;

and determining the state of a channel of the first communication system in the first measurement window according to the number of the resource units occupied by the first communication system in the first measurement window and/or the number of the resource units with the RSSI measured value larger than a first threshold value in the first measurement window.

2. The method according to claim 1, wherein determining the status of the channel of the first communication system within the first measurement window based on the number of resource elements occupied by the first communication system within the first measurement window and/or the number of resource elements for which the RSSI measurement value is greater than a first threshold value within the first measurement window comprises:

and determining the busy state of the channel of the first communication system in the first measurement window according to the ratio of the number of the resource units occupied by the first communication system in the first measurement window to the number of the resource units in the first measurement window.

3. The method according to claim 1, wherein determining the status of the channel of the first communication system within the first measurement window based on the number of resource elements occupied by the first communication system within the first measurement window and/or the number of resource elements for which the RSSI measurement value is greater than a first threshold value within the first measurement window comprises:

determining a channel busy status of the first communication system within a first measurement window according to the following relation:

Y＝A1÷[B-(A-A1)]，

wherein Y represents a channel busy state of the first communication system in the first measurement window, A1 represents a number of resource units occupied by the first communication system in the first measurement window, a represents a number of resource units whose RSSI measurement value is greater than a first threshold in the first measurement window, and B represents a number of resource units included in the first measurement window.

4. The method according to claim 1, wherein said determining the state of the channel of the first communication system within the first measurement window based on the number of resource elements occupied by the first communication system within the first measurement window and/or the number of resource elements whose RSSI measurement value within the first measurement window is greater than a first threshold value comprises:

determining a channel busy state of the first communication system in the first measurement window according to a ratio of the number of resource units with the RSSI measured value larger than a first threshold value in the first measurement window to the number of resource units in the first measurement window and a first offset;

or,

determining a channel busy state of the first communication system in the first measurement window according to a ratio of the number of resource units with the RSSI measured value larger than a first threshold value in the first measurement window to the number of resource units in the first measurement window and a first coefficient,

5. The method of claim 4, wherein the channel busy state of the first communication system in the first measurement window satisfies the following relationship:

Y＝(A1÷B)+offset，

Or,

Y＝(A1÷B)*α，

wherein Y represents a channel busy state of the first communication system in the first measurement window, A1 represents a number of resources occupied by the first communication system in the first measurement window, B represents a number of resource units included in the first measurement window, offset is the first offset, and α is the first coefficient.

6. The method according to any one of claims 1 to 5, wherein the channel busy status of the first communication system in the first measurement window is greater than and/or equal to a second threshold, the method further comprising at least one of:

a period reservation in the first communication system is enabled;

preemption in the first communication system is enabled;

and transmitting the first SL information and the second SL information of the first communication system in a first COT, wherein the first COT is determined according to parameters corresponding to the first SL information of the first communication system.

7. The method according to any of claims 1 to 6, wherein the first threshold is an energy detection threshold for channel access.

8. The method according to any one of claims 1 to 7, wherein the first communication system is a sidestream communication system.

9. A measurement method applied to an unlicensed spectrum communication system including a first communication system, comprising:

determining the number of resource units occupied by the first communication system in a second measurement window, wherein the number of resource units occupied by the first communication system in the second measurement window is smaller than or equal to the number of resource units with RSSI measured values larger than a second threshold value in the second measurement window;

and determining the state of a channel of the first communication system in the third measurement window according to the number of the resource units occupied by the first communication system in the second measurement window, wherein the third measurement window comprises the second measurement window.

10. The method of claim 9, wherein the third measurement window further comprises a fourth measurement window, wherein the third measurement window comprises time slots [ n-a, n+b ] in the time domain, wherein the second measurement window comprises time slots [ n-a, n-1] in the time domain, and wherein the fourth measurement window comprises time slots [ n, n+b ] in the time domain, wherein the time slots n are time slots measuring the state of the channel.

11. The method of claim 10, wherein determining the status of the channel of the first communication system within the third measurement window based on the number of resource units occupied by the first communication system within the second measurement window comprises:

determining the channel occupancy state of the first communication system within the third measurement window according to the following relationship:

Z＝(E+F)÷[D-(G-G1)],

wherein Z represents a channel occupancy state of the first communication system in the third measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units in which an RSSI measurement value in the second measurement window is greater than a second threshold, and G1 represents a number of resource units occupied by the first communication system in the second measurement window.

12. The method of claim 10, wherein determining the status of the channel of the first communication system within the third measurement window based on the number of resource units occupied by the first communication system within the second measurement window comprises:

Z＝(E+F)÷(D-G+G1-δ)，

or,

Z＝(E+F)÷[D-γ×(G-G1)]

wherein Z represents a channel occupancy state of the first communication system in the third measurement window, E represents a number of resource units transmitted by the first terminal device in the second measurement window, F represents a number of authorized resource units of the first terminal device in the fourth measurement window, D represents a number of resource units in the third measurement window, G represents a number of resource units whose RSSI measurement value is greater than a second threshold in the second measurement window, G1 represents a number of resource units occupied by the first communication system in the second measurement window, δ is an adjustment factor, and γ is a scale factor.

13. The method of claim 10, wherein determining the status of the channel of the first communication system within the third measurement window based on the number of resource units occupied by the first communication system within the second measurement window comprises:

and determining the channel occupation state of the first communication system according to the ratio of the sum of the number of the resource units transmitted by the first terminal device in the second measurement window and the number of the authorized resource units in the fourth measurement window to the number of the resource units in the third measurement window and a second offset and/or a second coefficient, wherein the value of the second offset and/or the second coefficient is predefined, preconfigured or network configured.

14. The method according to any of the claims 10 to 13, characterized in that the number of resource units authorized by the first terminal device within the fourth measurement window is determined based on the traffic priority or channel access priority, CAPC, of the first terminal device.

15. A method according to any one of claims 9 to 14, wherein the first communication system is a sidestream communication system.

16. The method of claim 15, wherein the method further comprises:

determining that first SL information is transmitted on a first time unit m according to a first channel occupation state, wherein a time unit of N time units before the first time unit m is a time unit m-N for measuring the first channel occupation state, and the first channel state meets at least one of the following conditions:

the i is a priority value corresponding to the first SL information, the k is a priority value smaller than or equal to i, the values of i and k are integers from 1 to 8, the offset is an offset, CR (i) is a channel occupation state when the measured priority value is i, CR _Limit (k) And the N is the congestion control processing time, which is the channel occupation state limit when the priority value is k.

17. The method of claim 15, wherein the method further comprises:

transmitting second SL information within a first COT, which belongs to SL information of a second terminal device or a first terminal device, based on a second channel occupancy status determination, the first COT being an initial COT of the first terminal device,

the second channel occupancy state satisfies at least one of:

the i is a priority value corresponding to the second SL information, the k is a priority value smaller than or equal to i, the values of i and k are integers from 1 to 8, the offset is an offset, CR (i) is a channel occupation state when the measured priority value is i, CR _Limit (k) Is the channel occupancy state limit for priority values k.

18. The method according to any of claims 10 to 17, wherein the second threshold is an energy detection threshold for channel access.

19. The method according to any of claims 1 to 18, wherein the RSSI measurements of the resource units are determined from a linear average of the sum of the RSSI received powers of U resource sub-units, the U being a positive integer less than or equal to L, the L being the number of the resource sub-units comprised by the resource unit.

20. The method of claim 19, wherein the step of determining the position of the probe comprises,

u is greater than or equal to a third threshold, or U/L is greater than or equal to a fourth threshold, or L-U is less than or equal to a fifth threshold, and it is determined that the RSSI measurement value of the resource unit is greater than the first threshold or the second threshold, where U is the number of resource subunits in the resource unit, where the RSSI measurement value is greater than the first threshold or the second threshold.

21. The method according to any of claims 1 to 20, wherein the resource elements comprise time domain elements comprising at least one of perceived time slots, symbols, perceived time slots, channel occupation times and/or frequency domain elements comprising at least one of subchannels, subchannels of consecutive RBs, subchannels of interleaved RBs, channels, RB sets, resource pools, guard bands, resource blocks, resource elements REs.

22. The method according to any of claims 1 to 21, wherein the resource sub-units comprise time domain units comprising at least one of perceived time slots, symbols, perceived time slots, channel occupation times and/or frequency domain units comprising at least one of subchannels, subchannels of consecutive RBs, subchannels of interleaved RBs, channels, RB sets, resource pools, guard bands, resource blocks, resource unit REs.

23. A measurement device, the measurement device belongs to a first communication system, the first communication system belongs to an unlicensed spectrum communication system, the measurement device comprises a transceiver module and a processing module, and the measurement device is characterized in that:

the processing module is used for determining the number of resource units occupied by the first communication system in a first measurement window, wherein the number of resource units occupied by the first communication system in the first measurement window is smaller than or equal to the number of resource units with RSSI measured values larger than a first threshold value in the first measurement window;

the processing module is further configured to determine a state of a channel of the first communication system in the first measurement window according to a number of resource units occupied by the first communication system in the first measurement window and/or a number of resource units in the first measurement window where an RSSI measurement value is greater than a first threshold value.

24. The apparatus of claim 23, wherein the processing module is configured to determine a channel busy status of the first communication system within the first measurement window based on a ratio of a number of resource units occupied by the first communication system within the first measurement window to a number of resource units within the first measurement window.

25. The apparatus of claim 23, wherein the processing module is configured to determine a channel busy status of the first communication system within a first measurement window according to the following relationship:

Y＝A1÷[B-(A-A1)]，

26. The apparatus of claim 23, wherein the processing module is configured to determine a channel busy status of the first communication system in the first measurement window based on a ratio of the number of resource units in the first measurement window for which the RSSI measurement value is greater than a first threshold to the number of resource units in the first measurement window and a first offset;

or,

the processing module is specifically configured to determine a channel busy state of the first communication system in the first measurement window according to a first coefficient and a ratio of the number of resource units in the first measurement window, where the RSSI measurement value is greater than a first threshold, to the number of resource units in the first measurement window,

27. The apparatus of claim 26, wherein a channel busy state of the first communication system in the first measurement window satisfies the following relationship:

Y＝(A1÷B)+offset，

or,

Y＝(A1÷B)*α，

28. The apparatus according to any one of claims 23 to 27, wherein a channel busy status of the first communication system in the first measurement window is greater than and/or equal to a second threshold,

the processing module is configured to enable periodic reservations in the first communication system;

the transceiver module is configured to transmit second SL information of the first communication system within a first COT, where the first COT is determined according to a parameter of the first SL information of the first communication system;

The processing module is configured to enable preemption in the first communication system;

the transceiver module is configured to transmit the first SL information and the second SL information of the first communication system within a first COT, where the first COT is determined according to a parameter corresponding to the first SL information of the first communication system.

29. The apparatus according to any one of claims 23 to 28, wherein the first threshold is an energy detection threshold for channel access.

30. The apparatus of any one of claims 23 to 29, wherein the first communication system is a sidestream communication system.

31. A measurement device, the measurement device belongs to a first communication system, the first communication system belongs to an unlicensed spectrum communication system, the measurement device comprises a transceiver module and a processing module, and the measurement device is characterized in that:

the processing module is used for determining the number of resource units occupied by the first communication system in a second measurement window, wherein the number of resource units occupied by the first communication system in the second measurement window is smaller than or equal to the number of resource units with RSSI measured values larger than a second threshold value in the second measurement window;

the processing module is further configured to determine a state of a channel of the first communication system in the third measurement window according to a number of resource units occupied by the first communication system in the second measurement window, where the third measurement window includes the second measurement window.

32. The apparatus of claim 31, wherein the third measurement window further comprises a fourth measurement window, wherein the third measurement window comprises time slots [ n-a, n+b ] in the time domain, wherein the second measurement window comprises time slots [ n-a, n-1] in the time domain, wherein the fourth measurement window comprises time slots [ n, n+b ] in the time domain, and wherein the time slot n is a time slot measuring a state of a channel.

33. The apparatus of claim 32, wherein the processing module is configured to determine the channel occupancy status of the first communication system within the third measurement window based on a relationship of:

Z＝(E+F)÷[D-(G-G1)],

34. The apparatus of claim 32, wherein the processing module is configured to determine the channel occupancy status of the first communication system within the third measurement window based on a relationship of:

Z＝(E+F)÷(D-G+G1-δ)，

or,

Z＝(E+F)÷[D-γ×(G-G1)]

35. The apparatus according to claim 31, wherein the processing module is configured to determine the channel occupancy status of the first communication system according to a ratio of a sum of a number of resource units transmitted by the first terminal apparatus in the second measurement window and a number of resource units authorized in the fourth measurement window to a number of resource units in the third measurement window, and a second offset and/or a second coefficient, wherein the value of the second offset and/or the second coefficient is predefined, preconfigured or network configured.

36. The apparatus according to any of claims 31 to 34, wherein the amount of resources authorized by the first terminal device within the fourth measurement window is determined according to the traffic priority of the first terminal device or the cap.

37. An apparatus according to any one of claims 31 to 35, wherein the first communication system is a sidestream communication system.

38. The apparatus of claim 37, wherein the processing module is configured to determine to transmit first SL information over a first time unit m based on a first channel occupancy state, a time unit N time units before the first time unit m being a time unit m-N that measures the first channel occupancy state, the first channel state satisfying at least one of:

39. The apparatus of claim 37 wherein the processing module determines, based on the second channel occupancy status, to transmit second SL information within a first COT, the second SL information pertaining to SL information of the second terminal device, the first COT being an initial COT of the first terminal device,

the second channel occupancy state satisfies at least one of:

40. The apparatus of any one of claims 31 to 39, wherein the second threshold is an energy detection threshold for channel access.

41. The apparatus of any one of claims 23-40, wherein the RSSI measurements for the resource units are determined from a linear average of a sum of RSSI received powers for U resource sub-units, the U being a positive integer less than or equal to L, the L being the number of the resource sub-units comprised by the resource unit.

42. The apparatus of any one of claims 23 to 41, wherein U is greater than or equal to a third threshold, or wherein u+.l is greater than or equal to a fourth threshold, or wherein L-U is less than or equal to a fifth threshold, wherein the RSSI measurement for the resource unit is determined to be greater than the first threshold or the second threshold, wherein U is the number of resource subunits in the resource unit for which the RSSI measurement is greater than the first threshold or the second threshold.

43. The apparatus according to any one of claims 23 to 42, wherein the resource elements comprise time domain elements comprising at least one of perceived time slots, symbols, perceived time slots, channel occupation times, and/or frequency domain elements comprising at least one of subchannels, subchannels of consecutive RBs, subchannels of interleaved RBs, channels, RB sets, resource pools, guard bands, resource blocks, resource elements REs.

44. The apparatus according to any one of claims 23 to 43, wherein the resource sub-units comprise time domain units comprising at least one of a perceived time slot, a symbol, a perceived time slot, a channel occupation time, and/or frequency domain units comprising at least one of a subchannel, a subchannel of consecutive RBs, a subchannel of interleaved RBs, a channel, a set of RBs, a resource pool, a guard band, a resource block, a resource unit RE.

45. A communication system comprising a communication device as claimed in any one of claims 23 to 44.

46. A communication device, comprising:

a processor for executing computer instructions stored in a memory to cause the apparatus to perform: the method of any one of claims 1 to 22.

47. The apparatus of claim 46, further comprising the memory.

48. The apparatus of claim 46 or 47, further comprising a communication interface coupled with the processor,

the communication interface is used for inputting and/or outputting information.

49. The device of any one of claims 46 to 48, wherein the device is a chip.