CN112929925B

CN112929925B - Semi-persistent scheduling method, device and system based on perception

Info

Publication number: CN112929925B
Application number: CN201911239530.0A
Authority: CN
Inventors: 易粟; 孙刚; 王昕�
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2023-11-21
Anticipated expiration: 2039-12-06
Also published as: CN112929925A

Abstract

The embodiment of the application provides a semi-persistent scheduling method, a device and a system based on perception, wherein the method comprises the following steps: the receiving terminal equipment generates information which reflects the wireless channel state and/or channel quality and is sensed by the receiving terminal equipment in each resource unit; the receiving end device sends the information reflecting the wireless channel state and/or the channel quality to a scheduling entity as auxiliary information, the scheduling entity reserves side link resources for the sending end device according to the auxiliary information, and the scheduling entity is network equipment or the sending end device.

Description

Semi-persistent scheduling method, device and system based on perception

Technical Field

The application relates to the technical field of communication.

Background

5G (fifth Generation mobile communication technology, 5th Generation mobile networks or 5th Generation wireless systems, 5th-Generation, abbreviated as 5G or 5G technology) vehicle communication is considered to be one of the major challenges faced by the next Generation communication systems. In 5G, vehicle-to-everything (V2X) use cases include vehicle formation (vehicle platooning), remote driving (remote driving), collaborative collision avoidance (cooperative collision avoidance), providing intersection safety information for city driving (intersection safety information provisioning for urban driving), and the like.

Use scenarios provided for intersection safety information for city driving. Intelligent intersections rely on wireless communications and therefore communication resources should be efficiently allocated to vehicles while maintaining security. In addition, traffic accidents often occur at intersections where vehicles and pedestrians are crowded, providing safety information to the vehicles to prevent traffic accidents, and assisting in collaborative autopilot functions when the vehicles pass through the intersections is necessary. Further, the safety information of the intersections relates to accurate digital maps, traffic signal information, traveling state information of pedestrians and vehicles, and position information, and is generally expressed in LDM (local dynamic map). LDM information will be downloaded into the vehicle periodically or on demand. This information is needed to understand the condition of the intersection and to control the automated vehicle.

This service is provided by an intelligent intersection system (or intersection safety information system) 10, and as shown in fig. 1, the system 10 is composed of a roadside radar 12, a traffic signal 11, and an LDM server 13, and an RSU (roadside unit) 14. The LDM server 13 monitors road conditions through the roadside radar 11 and the traffic signal 12, and generates LDM information which is transmitted to a terminal (e.g., a vehicle) through the RSU 14. For V2X services, it is important to exchange location information, such as information acquired by GPS. In some cases, the RSU also requires a large amount of traffic (traffic) to collect vehicle information (provided by the tachograph) from the terminal (e.g., vehicle).

It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section.

Disclosure of Invention

The inventors found that there is no solution for how to efficiently use the wireless spectrum for this intelligent junction system in situations where a large amount of data is required from the vehicle to the RSU.

In order to solve the above problems or other similar problems, embodiments of the present application provide a method, an apparatus, and a system for perception-based semi-persistent scheduling, so as to improve transmission efficiency and network performance.

According to a first aspect of an embodiment of the present application, there is provided a semi-persistent scheduling method based on awareness, wherein the method includes:

the receiving terminal equipment generates information which reflects the wireless channel state and/or channel quality and is sensed by the receiving terminal equipment in each resource unit; and

the receiving terminal equipment sends the information reflecting the wireless channel state and/or the channel quality to a scheduling entity as auxiliary information, and the scheduling entity reserves side link resources for the sending terminal equipment according to the auxiliary information.

According to a second aspect of an embodiment of the present application, there is provided a semi-persistent scheduling device configured in a receiving end device, where the device includes:

a generation unit for generating information reflecting the wireless channel state and/or channel quality sensed by the receiving end device at each resource unit; and

and the sending unit is used for sending the information reflecting the wireless channel state and/or the channel quality to a scheduling entity as auxiliary information, and the scheduling entity reserves side link resources for the sending end equipment according to the auxiliary information.

According to a third aspect of the embodiment of the present application, there is provided a semi-persistent scheduling method based on awareness, wherein the method includes:

the scheduling entity receives information reflecting the wireless channel state and/or the channel quality from the receiving end equipment and an index (T3) of a starting time unit corresponding to the information reflecting the wireless channel state and/or the channel quality;

and the scheduling entity reserves the side link resource for the transmitting end equipment according to the information reflecting the wireless channel state and/or the channel quality.

According to a fourth aspect of an embodiment of the present application, there is provided a semi-persistent scheduling device configured to a scheduling entity, where the device includes:

A receiving unit that receives information reflecting a radio channel state and/or channel quality from a receiving-end device, and an index (T3) of a start time unit corresponding to the information reflecting the radio channel state and/or channel quality;

and the processing unit reserves the side link resource for the transmitting end equipment according to the information reflecting the wireless channel state and/or the channel quality.

According to a fifth aspect of an embodiment of the present application, there is provided a terminal device, where the terminal device includes, as a receiving end device, the apparatus described in the foregoing second aspect, or the terminal device includes, as a transmitting end device, the apparatus described in the foregoing fourth aspect.

According to a sixth aspect of an embodiment of the present application, there is provided a network device, where the network device includes the apparatus of the fourth aspect.

One of the beneficial effects of the embodiment of the application is that: according to the embodiment of the application, the transmission efficiency and the network performance are improved.

Specific embodiments of the application are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the application are not limited in scope thereby. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts as used in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic illustration of a smart intersection system;

FIG. 2 is a schematic diagram of a hidden terminal problem;

FIG. 3 is a schematic diagram of a perceptually-based semi-persistent scheduling method of an embodiment of the first aspect;

FIG. 4 is a schematic diagram of a perceptually-based semi-persistent scheduling method of an embodiment of the second aspect;

fig. 5 is a schematic diagram of one example of reserving CSR based on map information from an RSU;

fig. 6 is a schematic diagram of another example of reserving CSR based on map information from an RSU;

FIG. 7 is a schematic diagram of a perceptually-based semi-persistent scheduling device in accordance with an embodiment of the third aspect;

FIG. 8 is a schematic diagram of a perceptually-based semi-persistent scheduling device in accordance with an embodiment of the fourth aspect;

fig. 9 is a schematic diagram of a communication system of an embodiment of the fifth aspect;

fig. 10 is another schematic diagram of a communication system of an embodiment of the fifth aspect;

FIG. 11 is a schematic diagram of a network device of an embodiment of the fifth aspect;

fig. 12 is a schematic diagram of a terminal device of an embodiment of the fifth aspect.

Detailed Description

The foregoing and other features of the application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the specification and drawings, there have been specifically disclosed specific embodiments of the application that are indicative of some of the ways in which the principles of the application may be employed, it being understood that the application is not limited to the specific embodiments described, but, on the contrary, the application includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of the present application, the terms "first," "second," and the like are used to distinguish between different elements from each other by name, but do not indicate spatial arrangement or time sequence of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "comprising," "including," "having," and the like, are intended to reference the presence of stated features, elements, components, or groups of components, but do not preclude the presence or addition of one or more other features, elements, components, or groups of components.

In embodiments of the present application, the singular forms "a," an, "and" the "include plural referents and should be construed broadly to mean" one "or" one type "and not limited to" one "or" another; furthermore, the term "comprising" is to be interpreted as including both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "according to" should be understood as "at least partially according to … …", and the term "based on" should be understood as "based at least partially on … …", unless the context clearly indicates otherwise.

3GPP (third generation partnership project) release 14 specifies modes 3 and 4 for supporting V2X communication, which uses a direct interface called a side link (sidelink) or PC5 interface of LTE (long term evolution). The side link communications allow the terminals to bypass the central base station and communicate in a peer-to-peer fashion. The PC5 interface is a one-to-many communication interface that allows a terminal to broadcast its messages in its neighbor set. When network coverage is available, the terminal will operate in mode 3, and the base station will be responsible for scheduling and allocating resources; in contrast, mode 4 is defined as supporting out-of-coverage or partial coverage communications in which resource allocation needs to be done in a distributed and unsupervised manner. Periodic transmissions (periodic transmission) are the primary transmission type for V2X applications, V2X communications employ a resource allocation mechanism known as a perceptually-based semi-persistent scheduling (SPS, semi-persistent scheduling).

In an embodiment of the present application, a V2I (vehicle-to-infrastructure) scenario is taken as an example, where most traffic is from a vehicle to an RSU. To simplify the resource allocation, V2I and V2V (vehicle-to-vehicle) may use dedicated sub-channels (sub-channels), respectively. The receiver mentioned in the embodiment of the present application is from the perspective of the application layer, and implementation in the physical layer is not limited to unicast, multicast and broadcast modes. If the current standard approach is adopted, the perceptually based SPS is based on the environmental perception of the sender (vehicle) and the Receiver (RSU) may have different interference conditions. This conventional method may cause the following disadvantages.

For mode 4, one obvious problem is a hidden terminal (hidden terminal) problem or a hidden node (hidden node) problem or a hidden station (hidden station) problem that occurs when a wireless node cannot hear one or more other nodes, which would result in a perceived-based SPS not functioning properly. When this occurs, multiple nodes will attempt to transmit their data on the shared medium (medium) simultaneously, causing signal interference. For example, in fig. 2, each vehicle is within the communication range of the RSU, but the vehicles cannot communicate with each other because they are too far apart from each other, or there is an occlusion between the two nodes, causing each other to not hear each other, the nodes being mutually referred to as hidden nodes of each other. When two vehicles start to send data packets to the RSU at the same time, since the two vehicles are not in the perception range, no collision can be detected during transmission, and thus, collision occurs, and the data received by the RSU is destroyed.

Another problem is that RSRP (reference signal received power) measurements and S-RSSI (side link received signal strength indication) calculations used when reserving resources are inaccurate. Each terminal is at T _sense During which CSR (candidate single-subframe resource) is reserved based on its measured RSRP and S-RSSI information. Assuming that a lower S-RSSI/RSRP indicates a lower interference level or collision probability, a CSR with a lower S-RSSI value or lower RSRP will have a higher chance to be reserved for transmission. However, the interference determining the quality of the received data packets is determined by the Receiver (RSU) measurement data. This means that the RSRP/S-RSSI measurements made at the sender are for the transmissionIs inaccurate for channel estimation. Thus, current perceptually-based SPS will not efficiently reserve radio resources.

The present application has been made in order to solve the above-mentioned problem of hidden terminals or the above-mentioned problem of lack of channel measurement results regarding the side links.

In the embodiments of the present application, for convenience of description, some terms such as CSR are used for LTE. In NR, CR (candidate resource ) is changed due to the lack of CSR concept. The reason is that the scheduled time unit is not a subframe (subframe), but a slot (slot). Therefore, in the NR scenario, the above CSR is changed to CR, and the implementation is still unchanged. In NR, mode 3 and mode 4 are converted to corresponding mode 1 and mode 2. Likewise, in NR implementations, the mode description changes accordingly.

Various implementations of embodiments of the present application are described below with reference to the accompanying drawings. These implementations are merely illustrative and not limiting of the embodiments of the present application.

First aspect of the embodiments

A first aspect of an embodiment of the present application provides a perception-based semi-persistent scheduling method, which is applied to a receiving end device in a V2X scene, such as the RSU or a vehicle described above. Fig. 3 is a schematic diagram of a semi-persistent scheduling method based on sensing according to an embodiment of the present application, please refer to fig. 3, which includes:

operation 301: the receiving terminal equipment generates information which reflects the wireless channel state and/or channel quality and is sensed by the receiving terminal equipment in each resource unit;

operation 302: the receiving terminal equipment sends the information reflecting the wireless channel state and/or the channel quality to a scheduling entity as auxiliary information, and the scheduling entity reserves side link resources for the sending terminal equipment according to the auxiliary information.

In some embodiments, the information reflecting the radio channel condition is a Reference Signal Received Power (RSRP) map indicating an average RSRP over the resource blocks constituting the transport block transmitting the SCI when the receiving end device receives the side link control information (SCI) for a period of time prior to the current message period and the resource elements to be reserved by the terminal device transmitting the SCI correspond to time-frequency resources within the current resource reservation window.

In some embodiments, the information reflecting channel quality is a side link received signal strength indication (S-RSSI) map indicating a linear average of the S-RSSI of each sub-channel sensed by the receiving end device over a period of time prior to the current message period (T) sampled with the message period (T) as a period.

In the embodiment of the present application, a receiving end device sends an index (T3) of a start time unit of a current message period (i.e., an index of a start time unit corresponding to the RSRP map and/or the S-RSSI map) to a scheduling entity, the scheduling entity performs scheduling time window alignment according to the index of the start time unit, and performs edge link resource reservation according to the RSRP map and/or the S-RSSI map, where the scheduling entity is a network device or a transmitting end device.

In the embodiment of the present application, for V2I communication, a receiving-end device, for example, an RSU, which receives data, and a transmitting-end device, for example, a vehicle, which transmits data; for V2V communication, the receiving end device is, for example, a receiving end of data, the transmitting end device is, for example, a transmitting end of data, and both the receiving end and the transmitting end are vehicles.

In the embodiment of the present application, the receiving end device (RSU or vehicle) periodically generates one or two maps (RSRP map and/or S-RSSI map) and sends the maps to the network device (for mode 3) or broadcasts the maps (for mode 4), and the scheduling entity (network device or transmitting end device) receives the maps and performs resource reservation based on the RSRP map and/or S-RSSI map and its own sensing information. The channel measurement result of the receiving end is considered when the resource reservation is carried out, so that the efficiency of the resource reservation is improved. In addition, in mode 4, the problem of hiding the terminal is also solved.

In the embodiment of the present application, the receiving end device may generate the RSRP map and/or the S-RSSI map in each message period (T), and the receiving end device may send the RSRP map and/or the S-RSSI map to the scheduling entity, for example, to the network device, or broadcast to the transmitting end device in each message period (T).

In some embodiments, the RSRP map includes a plurality of elements, each element corresponding to a time-frequency resource within a resource reservation window, the element values of the elements being: when the receiving end device receives the SCI in the sensing period (Tsense), and the terminal device sending the SCI wants to reserve the time-frequency resource unit, the average RSRP on the corresponding resource blocks constituting the transmission block for transmitting the SCI. The present application is not limited to a specific calculation method, and may refer to the related art. Here, the sensing period may include a plurality of message periods, and the sensing period does not include the current message period.

In some embodiments, the S-RSSI map includes a plurality of elements, each element corresponding to a time-frequency resource within a resource reservation window, the element values of the elements being: the S-RSSI of each sub-channel at each time unit within the sensing period (Tsense) is a linear average of samples taken over the message period (T). Here, the sensing period may include a plurality of message periods, and the sensing period does not include the current message period. Further, a time unit may be a frame, a subframe, a slot, or a sub-slot, and in an embodiment of the present application, one time unit may be referred to as one TTI (transmission time interval).

In the embodiment of the present application, the RSRP map and the S-RSSI map may be in any form, for example, may be in a text form, or a table form, or a mapping form, or a vector form, or an array form, or a matrix form, etc., and the present application is not limited thereto.

In the embodiment of the present application, if the receiving end device is in a transmitting state within the foregoing period of time or within a certain time unit or certain time units within the foregoing sensing period, the receiving end device cannot sense a channel, and then the element values of the elements on the map (RSRP map and/or S-RSSI map) corresponding to the certain time unit or certain time units are predetermined values, where the predetermined values indicate "not sensed".

In order to make the method of the embodiment of the application clearer and more understandable, the following description uses the receiving end device as an RSU, the transmitting end device as a vehicle in the intelligent intersection system, the generated map is an S-RSSI map, and the method is applied to the mode 3 as an example.

In this example, assume that the RSU and the vehicle in the intelligent junction system use the same application program, and the same Physical (PHY) layer/Medium Access Control (MAC) layer parameters are set. And assuming that the RSU and the vehicle have the same T and T _sense The configuration "T" is a message period, which may be a generation period of a map, for example, an S-RSSI map, where the message period T is used to calculate an average value of S-RSSI in the S-RSSI map, and may be a transmission period of the map, that is, a transmission interval of the map, as described above; t (T) _sense "is a sensing period (sensing period), which is the data source of the map, and still taking the S-RSSI map as an example, the S-RSSI average value in the S-RSSI map is based on T _sense And calculating and obtaining data in a range. In some embodiments, one setting is t=100 ms, T _sense ＝1s。

In some embodiments, the RSU generates map elements on a per-subchannel basis. For example, the S-RSSI map is considered as a T S matrix, with each element corresponding to an average sensed S-RSSI value in a frequency-time grid (grid). Since the LTE subframe has a duration of 1ms, there are T subframes in one message interval. In 5G NR (new radio), a slot is one of the dynamic scheduling units. The duration of a time slot (in milliseconds) depends on a basic parameter (numerology). For example, when the subcarrier spacing is 15kHz, one slot is 1ms. For a subcarrier spacing of 30kHz, one slot is 0.5ms, and so on.

In this example, for convenience of explanation, it is assumed that one NR slot is 1ms, and thus there are still T Slots (TTIs) in one message interval. For other slot durations, there are T' = (T/slot duration) TTIs in one message interval. The map size will be changed to T' x S. In this example, TTI is used as a generic term to refer to subframes of LTE or slots of NR. Thus, the TTI index can be considered as a timing unit (timing unit, tooMay be referred to as a time cell). S is the number of subchannels in the entire frequency band. Each element E in the matrix _t，s Is all previous T-T x j TTIs in the sensing period (j=1, 2, …, T _sense The linear average of the S-RSSIs on sub-channels S on/T) can be expressed as follows:

in the above equation, t is a TTI index, and s is a subchannel index.

In some embodiments, as previously described, if at time T, the RSU transmits during any previous T-T x j (j=1, 2, …, tsense/T) TTI, i.e., the RSU is in a transmit state, occupying a channel, it will not be able to receive a transmission or sense (sense) channel from other terminals (vehicles as previously described) due to half duplex transmission. In this case E _t，s Is assigned an indication (indicator) other than an RSSI value, referred to herein as a "predetermined value", e.g., E _t，s = 'N' (i.e. not sensed).

In the embodiment of the application, the S-RSSI map is generated and sent once every T, but because the sensing period is T _sense Thus E in the above formula _t，s A sliding window average is used.

In the embodiment of the application, similar to the structure of the S-RSSI map, the RSRP map can also use a T×S matrix. If last T _sense In the period, the RSU has correctly received the SCI from another terminal, indicating that the terminal will use a certain resource unit in the estimated period (estimate cycle) (e.g. if the SCI reserves a certain CSR comprising a sub-channel s, a resource unit at TTI index t), then it is a certain element P on the RSRP map _t，s A value is provided which is the average RSRP over RBs (resource blocks) over a TB (transport block) for transmitting the SCI. If the RSU receives multiple SCIs from the same interfering terminal reserving the same CSR, it will use the latest one to estimate the average RSRP. All other elements in the RSRP map will be given the value "— Inf",i.e., minus infinity, to provide convenience for subsequent computation and scheduling.

Defined in NR V2X, a terminal (e.g., UE) may report assistance information to a network device (e.g., gNB) including at least geographic information, e.g., location, associated with the terminal, and including periodic reporting, timing offset (timing offset) and message size of Uu and sidelink V2X traffic at least for periodic traffic (traffic).

In the embodiment of the application, the RSU may report information reflecting the wireless channel state and/or channel quality sensed at each resource unit as auxiliary information to the network device. The network device may use the assistance information provided by the RSU for resource reservation. For example, the RSU transmits the S-RSSI map and the RSRP map to the network device and includes a start TTI index T3 (similar to the "now" time at the RSU end) of an estimated period (T3 to t3+t, see fig. 5), which is T ms, from which the network device makes a resource reservation.

In the embodiment of the application, the transmission method of the auxiliary information is not limited, for example, a dedicated physical layer control channel can be added to transmit the auxiliary information. The processing of the network device will be described in the following embodiments. In the embodiment of the present application, the RSU and each vehicle may have an asynchronous period, and as shown in fig. 5, the message period of the vehicle is a T period, and the message period of the RSU is a T' period.

The embodiment of the present application has been described above by taking mode 3 as an example, and the embodiment of the present application can also be applied to mode 4. For example, the RSU may broadcast one or both of the maps (RSRP map and/or S-RSSI map) periodically. Each vehicle (transmitting end device) receives the broadcast message about the map and performs resource reservation according to the RSRP map/S-RSSI map and its own sensing information, and the method is similar to the network device, which will be described in the following embodiments.

In addition, the embodiment of the present application is described above by taking the V2I scene as an example, and the embodiment of the present application can be extended to any V2X scene. For example, in a general environment, each vehicle (receiving end device) may generate one or both of the maps described above like the RSU of the embodiment of the present application. The vehicle sends the generated map to the network device (mode 3) or broadcast (mode 4) along with the start TTI index of the estimated period (also referred to as the current message period). The network device or other vehicle (sender device) makes SPS decisions using the received map information.

In addition, the embodiment of the application can also work in a mixed mode, and a plurality of RSUs can be arranged in the network. The RSU perceives the environment using the same method. That is, the RSU in one mode can also sense signals from the terminal in the other mode.

The embodiment of the application can be applied to LTE or 5G NR V2X deployment, and the application does not limit the deployment environment.

According to the embodiment of the application, as described above, the receiving end device sends the information reflecting the wireless channel state and/or the channel quality (such as an RSRP map and/or an S-RSSI map) to the scheduling entity as a reference when the resource is reserved, and the transmission efficiency and the network performance are improved due to the consideration of the information reflecting the wireless channel state and/or the channel quality sensed by the receiving end.

Second aspect of the embodiment

A second aspect of the embodiments of the present application provides a semi-persistent scheduling method based on awareness, which is applied to a scheduling entity, for example, a network device in mode 3, or a terminal device (transmitting end device) in mode 4. The method is a process on the scheduling side corresponding to the method of the first aspect of the embodiment, and the same portions as those of the first aspect of the embodiment will not be repeated.

Fig. 4 is a schematic diagram of a perceived-based semi-persistent scheduling method according to an embodiment of the present application, as shown in fig. 4, the method includes:

operation 401: the scheduling entity receives information reflecting the wireless channel state and/or the channel quality from the receiving end equipment and an index (T3) of a starting time unit corresponding to the information reflecting the wireless channel state and/or the channel quality;

Operation 402: and the scheduling entity reserves the side link resource for the transmitting end equipment according to the information reflecting the wireless channel state and/or the channel quality.

In an embodiment of the present application, as described in the first aspect of the embodiment, the information reflecting the radio channel status is, for example, an RSRP map, where the RSRP map indicates that the receiving end device receives the side link control information (SCI) within a period of time before the current message period, and an average RSRP over the resource blocks that constitute the transport block transmitting the SCI when the resource unit to be reserved by the terminal device transmitting the SCI corresponds to the time-frequency resource within the current resource reservation window.

Furthermore, as described in the first aspect of the embodiment, the information reflecting the channel quality is, for example, an S-RSSI map indicating a linear average of the S-RSSI of the respective sub-channels sensed by the receiving end device during a period of time preceding the current message period (T) sampled with the message period (T) as a period. The details are described in the first aspect of the embodiment, and the description thereof is omitted here.

In the embodiment of the present application, as described above, the scheduling entity may be a network device (mode 3) or a transmitting end device (mode 4).

In the embodiment of the present application, as described above, the embodiment of the present application may be applied to V2I scenes, and may also be applied to other V2X scenes, for example, V2V scenes. In the V2I scenario, the receiving end device may be an RSU and the transmitting end device may be a vehicle. In the V2V scenario, the receiving-end device may be a receiving end of data or signals or information, and the transmitting-end device may be a transmitting end of data or signals or information.

In some embodiments, in operation 402, the scheduling entity may align the positions of the RSRP map and/or the S-RSSI map with the scheduling resource grid of the scheduling entity according to the index (T3) of the start time unit, and then allocate the edge link resource for the transmitting end device according to the RSRP element and/or the S-RSSI element in the selection window. Here, the selection window is after the current time and before the next message period, and a plurality of time units are included in the selection window.

Fig. 5 is a schematic diagram of one example of reserving CSR based on map information (only S-RSSI map is shown) from an RSU, and fig. 6 is a schematic diagram of another example of reserving CSR based on map information (only S-RSSI map is shown) from an RSU.

In some embodiments, each time unit of the selection window corresponds to an RSRP element and/or an S-RSSI element, as shown in fig. 5, at which time, the scheduling entity may allocate an edge link resource for the sender device according to the RSRP element and/or the S-RSSI element in the selection window.

In some embodiments, a part of time units in the selection window corresponds to an RSRP element and/or an S-RSSI element, and another part of time units does not correspond to an RSRP element and/or an S-RSSI element, as shown in fig. 6, at this time, the scheduling entity may allocate, for the transmitting end device, an edge link resource according to the RSRP element and/or the S-RSSI element in the adjusted selection window, the RSRP element and/or the S-RSSI element in a portion where the RSRP map and/or the S-RSSI map of the message period before the current message period overlap the selection window.

In some embodiments, the scheduling entity may calculate an RSRP maximum value and/or an S-RSSI average value for resource units (CSR or CR) comprising consecutive L sub-channels of the same time unit within the selection window, generate an RSRP matrix and/or an S-RSSI matrix for each resource unit (CSR or CR), and allocate an edge link resource for the transmitting device according to the RSRP matrix and/or the S-RSSI matrix.

The resource reservation of the scheduling entity will be described below taking mode 3 as an example.

In mode 3, the scheduling entity is a network device, which may receive the map from the receiving device and the index of the start time unit (T3), and align the position of the map with its own scheduling resource grid based on T3 (time stamp).

As shown in fig. 5 and 6, it is assumed that the network device needs to allocate resources for the vehicle V. Due to the asynchronism of the message periods between all terminals, the following relationship will be satisfied: now-T is less than or equal to T3<Now, now is an index of the current time, and T is a message period. The selection window is the time between T1 and T2, i.e. the new sub-channel that the vehicle V needs to reserve. Vehicle V is directed to only E corresponding to TTI in the selection window _t，s (and/or P) _t，s ) Of interest.

There will be two cases how the relevant map elements are allocated in the selection window. Fig. 5 shows case 1, in which all relevant elements E _t，s (and/or P) _t，s ) Are included in a selection window. Fig. 6 shows case 2, where the relevant elements of the map are divided into two parts, one in the selection window and the other in the position of the selection window shifted left by T TTIs.

For case 1, the network device may be based on selecting map element E within the window _t，s (and/or P) _t，s ) A resource reservation is made for the transmitting device (vehicle V).

For case 2, the network device may cut out the portion of the map that overlaps the offset selection window and put it at the end of the map to have a new aligned map and based on the map element E on the new map _t，s (and/or P) _t，s ) A resource reservation is made for the transmitting device (vehicle V). Taking the S-RSSI map as an example, if t <T ₂ -T, then E _t+T,s ＝T _t,s . The same operation is performed on other maps.

Thus, the network device may calculate an average S-RSSI for each resource unit (e.g., CSR) consisting of L consecutive subchannels in the selection window using the S-RSSI map, as follows:

in the above equation, t is the TTI index, and x is the starting subchannel index of the CSR. Fig. 5 and 6 show S-RSSI maps assuming l=3.

In some embodiments, if E _t，s = = 'N', R _t，x Instead of using the above formula to calculate, let R _t,x = 'N' (predetermined value). Indicating 'Not available', i.e. "Not sensed", e.g. the resource is Not sensed for half duplex reasons.

In some embodiments, as previously described, the network device may generate a new matrix for RSRP based on each CSR as follows:

RSRP _t,x ＝max(P _t,x ,P _t,x+1 ,…,P _t,x+L-1 )

in the above equation, t is the TTI index, and x is the starting subchannel index of the CSR.

In an embodiment of the present application, to reserve a new subchannel in the selection window, the network device may use the capability to utilize R _t,x And RSRP _t,x Is a resource management algorithm of the above system. The principle is to avoid the use of a high RSRP _t，x CSR of value should be selected to have a lower R _t,x While also taking into account fairness among all vehicles.

According to the embodiment of the application, as described above, the scheduling entity considers the information which reflects the wireless channel state and/or the channel quality and is sensed by the receiving end when the resource reservation is carried out, so that the transmission efficiency and the network performance are improved.

Third aspect of the embodiment

The embodiment of the application provides a semi-persistent scheduling device based on perception. The apparatus may be, for example, a receiver-side device RSU in a V2I scenario, a vehicle serving as a receiver-side device in a V2V scenario, or some parts or components of the RSU or the vehicle. The embodiments of the present application are the same as those of the first and second aspects and will not be described in detail.

Fig. 7 is a schematic diagram of a semi-persistent scheduling device based on sensing, and as shown in fig. 7, a semi-persistent scheduling device 700 based on sensing includes: a generating unit 701 and a transmitting unit 702.

In the embodiment of the present application, the generating unit 701 is configured to generate information reflecting the radio channel state and/or channel quality sensed by the receiving end device in each resource unit, and the sending unit 702 is configured to send the information reflecting the radio channel state and/or channel quality to the scheduling entity as auxiliary information, so that the scheduling entity can perform the side link resource reservation according to the auxiliary information.

In some embodiments, the information reflecting the radio channel state is, for example, a Reference Signal Received Power (RSRP) map. As described above, the RSRP map indicates the average RSRP over the resource blocks constituting the transport block transmitting the SCI when the receiving end device receives the side link control information (SCI) for a period of time before the current message period and the resource elements to be reserved by the terminal device transmitting the SCI correspond to the time-frequency resources within the current resource reservation window.

In some embodiments, the information reflecting channel quality is, for example, a side link received signal strength indication (S-RSSI) map. As previously described, the S-RSSI map indicates a linear average of the S-RSSI of each sub-channel sensed by the receiving device for a period of time prior to the current message period (T) sampled with the message period (T) as a period.

In the embodiment of the present application, the sending unit 702 is configured to send the RSRP map and/or the S-RSSI map, and an index (T3) of a start time unit of a current message period to a scheduling entity. The scheduling entity performs scheduling time window alignment according to the index of the starting time unit, and performs side link resource reservation according to the RSRP map and/or the S-RSSI map, where the scheduling entity may be a network device in mode 3 or a transmitting end device in mode 4, for example, a vehicle.

In some embodiments, the RSRP map includes a plurality of elements, each element corresponding to a time-frequency resource within one resource reservation window, and the element values of the elements are: when the receiving end device receives the SCI in the sensing period (Tsense) and transmits the time-frequency resource to be reserved by the terminal device of the SCI, the average RSRP on the corresponding resource blocks constituting the transmission block for transmitting the SCI.

In some embodiments, the S-RSSI map includes a plurality of elements, each element corresponding to a time-frequency resource within a resource reservation window, the element values of the elements being: the S-RSSI of each sub-channel at each time unit within the sensing period (Tsense) is a linear average of samples taken over the message period (T).

In some embodiments, the sensing period described above does not include a current message period, which may also be referred to as an estimated period.

In some embodiments, if the receiving end device is in a transmitting state during the period of time or during a certain time unit or certain time units in the sensing period, the element value of the element on the RSRP map and/or the S-RSSI map corresponding to the certain time unit or certain time units is a predetermined value, where the predetermined value indicates that the sensing is not performed.

In some embodiments, the time units are frames, subframes, slots, or sub-slots, and the application is not limited thereto.

In some embodiments, the receiving end device generates the RSRP map and/or the S-RSSI map at each of the message periods (T). And the receiving end device sends the RSRP map and/or the S-RSSI map to the scheduling entity at each message period (T).

In some embodiments, the RSRP map is in the form of: text, table, map, vector, array, or matrix; the S-RSSI map is in the form of: text, table, map, vector, array, or matrix. But the present application is not limited thereto.

In some embodiments, the receiving end device is an RSU in a V2I scene and the transmitting end device is a vehicle in a V2I scene.

In some embodiments, the receiving end device is a receiving end of information or a message or a signal or data in a V2V scene, and the transmitting end device is a transmitting end of information or a message or a signal or data in a V2V scene.

Further, for simplicity, only the connection relationship or signal trend between the respective components or modules is exemplarily shown in fig. 7, but it should be apparent to those skilled in the art that various related technologies such as bus connection may be employed. The above components or modules may be implemented by hardware means such as a processor, a memory, a transmitter, a receiver, etc.; the practice of the application is not so limited.

The above embodiments have been described only by way of example of the embodiments of the present application, but the present application is not limited thereto, and may be appropriately modified based on the above embodiments. For example, each of the above embodiments may be used alone, or one or more of the above embodiments may be combined.

As can be seen from the above embodiments, the receiving end device sends information reflecting the wireless channel state and/or channel quality (for example, RSRP map and/or S-RSSI map) to the scheduling entity as a reference when reserving resources, and the transmission efficiency and network performance are improved due to the consideration of the information reflecting the wireless channel state and/or channel quality sensed by the receiving end.

Fourth aspect of the embodiment

The embodiment of the application provides a semi-persistent scheduling device based on perception. The apparatus may be, for example, a scheduling entity, or may be some part or some component or assembly configured with the scheduling entity. The scheduling entity here is, for example, a network device in mode 3, or may be a sender device in mode 4. The embodiments of the present application are the same as those of the first to third aspects, and will not be described in detail.

Fig. 8 is a schematic diagram of a semi-persistent scheduling device based on sensing according to an embodiment of the present application, as shown in fig. 8, a semi-persistent scheduling device 800 based on sensing includes: a receiving unit 801 and a processing unit 802.

In the embodiment of the present application, the receiving unit 801 is configured to receive information reflecting a radio channel state and/or channel quality from a receiving end device and an index (T3) of a start time unit corresponding to the information reflecting the radio channel state and/or channel quality, and the processing unit is configured to reserve an edge link resource for a transmitting end device according to the information reflecting the radio channel state and/or channel quality.

In some embodiments, the information reflecting the radio channel state is an RSRP map, which, as mentioned above, indicates the average RSRP over the resource blocks constituting the transport block transmitting the SCI when the receiving end device receives the side link control information (SCI) for a period of time before the current message period and the resource elements to be reserved by the terminal device transmitting the SCI correspond to time-frequency resources within the current resource reservation window.

In some embodiments, the information reflecting the channel quality is an S-RSSI map that, as previously described, indicates a linear average of the S-RSSI of each sub-channel sensed by the receiving device over a period of time prior to the current message period (T) sampled with the message period (T) as a period.

In an embodiment of the present application, the processing unit 802 is configured to perform an edge link resource reservation according to the RSRP map and/or the S-RSSI map.

In some embodiments, as shown in fig. 8, the processing unit 802 includes an alignment unit 8021 and an allocation unit 8022, the alignment unit 8021 aligning the positions of the RSRP map and/or the S-RSSI map with the scheduling resource grid of the scheduling entity according to the index (T3) of the start time unit; the allocation unit 8022 allocates an edge link resource to the transmitting end device according to the RSRP element and/or the S-RSSI element in a selection window, which is after the current time and before the next message period, and which includes a plurality of time units therein.

In some embodiments, the index (T3) of the start time unit has the following relationship with the index (Now) of the current time: and the Now-T is less than or equal to T3 and less than Now, and T is the message period.

In some embodiments, each time unit of the selection window corresponds to an RSRP element and/or an S-RSSI element, and the allocation unit 8022 allocates an edge link resource to the transmitting device according to the RSRP element and/or the S-RSSI element in the selection window.

In some embodiments, a part of time units in the selection window corresponds to an RSRP element and/or an S-RSSI element, another part of time units does not correspond to an RSRP element and/or an S-RSSI element, and the allocation unit 8022 allocates an RSRP map and/or an S-RSSI element of a message period before the current message period to the transmitting device according to the adjusted RSRP element and/or S-RSSI element in the selection window as the RSRP element and/or S-RSSI element in the selection window.

In some embodiments, the allocation unit 8022 calculates an RSRP maximum value and/or an S-RSSI average value of resource units (CSR or CR) comprising consecutive L sub-channels of the same time unit in the selection window, generates an RSRP matrix and/or an S-RSSI matrix for each resource unit (CSR or CR), and allocates an edge link resource for the transmitting device according to the RSRP matrix and/or the S-RSSI matrix.

In some embodiments, the receiving end device is an RSU in a V2I scene, and the transmitting end device is a vehicle in a V2I scene.

In some embodiments, the receiving end device is a receiving end in a V2V scene, and the transmitting end device is a transmitting end in a V2V scene.

It should be noted that the above only describes the respective components or modules related to the present application, but the present application is not limited thereto. The awareness-based semi-persistent scheduling device 800 may also include other components or modules, for the details of which reference may be made to the related art.

Further, for simplicity, the connection relationship or signal trend between the respective components or modules is only exemplarily shown in fig. 8, but it should be apparent to those skilled in the art that various related technologies such as bus connection may be employed. The above components or modules may be implemented by hardware means such as a processor, a memory, a transmitter, a receiver, etc.; the embodiments of the present application are not limited in this regard.

According to the embodiment, the scheduling entity considers the information which reflects the wireless channel state and/or the channel quality and is sensed by the receiving end when the resource reservation is carried out, so that the transmission efficiency and the network performance are improved.

Embodiments of the fifth aspect

The embodiment of the application also provides a communication system, fig. 9 is a schematic diagram of the communication system, and fig. 10 is another schematic diagram of the communication system. The same contents as those of the embodiments of the first to fourth aspects are not repeated.

In some embodiments, as shown in fig. 9, a communication system 900 includes: network device 901, RSU 902 and terminal device 903 for ease of illustration, one terminal device 903 is shown in fig. 9, in an embodiment of the present application, V2I communication is performed between RSU 902 and terminal device 903 as previously described.

In mode 3, network device 901 may act as a scheduling entity, making resource reservations for terminal device 903, and RSU 902 may send information (e.g., RSRP map and/or S-RSSI map) reflecting wireless channel status and/or channel quality to network device 901.

In mode 4, the terminal device 903 may act as a scheduling entity, and the RSU 902 may send information reflecting the radio channel status and/or channel quality (e.g., RSRP map and/or S-RSSI map) to the terminal device 902, and the terminal device 903 performs resource reservation.

For example, the RSU 902 generates an RSRP map and/or an S-RSSI map, sends the RSRP map and/or the S-RSSI map and an index of a start time unit of a current message period to the network device 901 or the terminal device 903, and the network device 901 or the terminal device 903 performs scheduling time window alignment according to the index of the start time unit, and performs edge link resource reservation according to the RSRP map and/or the S-RSSI map.

In some embodiments, as shown in fig. 10, a communication system 1000 includes: the V2V communication is performed among the network device 1001, the first terminal device 1002, and the second terminal device 1003, and the first terminal device 1002 and the second terminal device 1003.

In mode 3, the network device 1001 may perform resource reservation for the first terminal device 1002 or the second terminal device 1003 as a transmitting end device as a scheduling entity, and the second terminal device 1003 or the first terminal device 1002 as a receiving end device may transmit information (e.g., RSRP map and/or S-RSSI map) reflecting the wireless channel state and/or channel quality to the network device 1001.

In mode 4, the first terminal device 1002 or the second terminal device 1003 as a transmitting end device may serve as a scheduling entity, and the second terminal device 1003 or the first terminal device 1002 as a receiving end device may transmit information reflecting a wireless channel state and/or channel quality (e.g., an RSRP map and/or an S-RSSI map) to the first terminal device 1002 or the second terminal device 1003 as a transmitting end device, and the first terminal device 1002 or the second terminal device 1003 as a transmitting end device performs resource reservation.

The embodiment of the application also provides a network device, which may be, for example, a base station (gNB), but the application is not limited thereto, and may be other network devices.

Fig. 11 is a schematic diagram of a configuration of a network device according to an embodiment of the present application. As shown in fig. 11, the network device 1100 may include: a processor 1110 (e.g., a central processing unit CPU) and a memory 1120; a memory 1120 is coupled to the processor 1110. Wherein the memory 1120 may store various data; further, a program 1130 of information processing is stored, and the program 1130 is executed under the control of the processor 1110.

For example, the processor 1110 may be configured to execute a program to implement the method as described in the embodiment of the second aspect. For example, the processor 1110 may be configured to control as follows: receiving information reflecting the wireless channel state and/or the channel quality from a receiving end device, and an index (T3) of a starting time unit corresponding to the information reflecting the wireless channel state and/or the channel quality; and carrying out side link resource reservation according to the information reflecting the wireless channel state and/or the channel quality.

In addition, as shown in fig. 11, the network device 1100 may further include: a transceiver 1140 and an antenna 1150; wherein, the functions of the above components are similar to the prior art, and are not repeated here. It is noted that the network device 1100 need not include all of the components shown in fig. 11; in addition, the network device 1100 may further include components not shown in fig. 11, to which reference is made to the prior art.

The embodiment of the present application further provides a terminal device, for example, may be a UE, which may be an RSU or a vehicle serving as a receiving end device in V2X communication, for implementing the method described in the embodiment of the first aspect, or may be a vehicle serving as a transmitting end device (scheduling entity) in V2X communication, for implementing the method described in the embodiment of the second aspect, but the present application is not limited thereto, and may be other devices.

Fig. 12 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in fig. 12, the terminal device 1200 may include a processor 1210 and a memory 1220; memory 1220 stores data and programs and is coupled to processor 1210. Notably, the diagram is exemplary; other types of structures may also be used in addition to or in place of the structures to implement telecommunications functions or other functions.

For example, processor 1210 may be configured to execute a program to implement a method as described in an embodiment of the first aspect. For example, the processor 1210 may be configured to control as follows: generating information reflecting the wireless channel state and/or the channel quality, and transmitting the information reflecting the wireless channel state and/or the channel quality to a scheduling entity.

As another example, the processor 1210 may be configured to execute a program to implement the method as described in the embodiment of the second aspect. For example, the processor 1210 may be configured to control as follows: receiving information reflecting the wireless channel state and/or the channel quality from a receiving end device, and an index (T3) of a starting time unit corresponding to the information reflecting the wireless channel state and/or the channel quality, and reserving side link resources according to the information reflecting the wireless channel state and/or the channel quality.

As shown in fig. 12, the terminal device 1200 may further include: a communication module 1230, an input unit 1240, a display 1250, a power supply 1260. Wherein, the functions of the above components are similar to the prior art, and are not repeated here. It is to be noted that the terminal apparatus 1200 is not necessarily required to include all the components shown in fig. 12, and the above-described components are not necessarily required; in addition, the terminal device 1200 may further include components not shown in fig. 12, to which reference is made.

The present application also provides a computer readable program, wherein the program, when executed in a terminal device (RSU or UE), causes the terminal device to perform the method of the first aspect of the embodiments.

The present application also provides a storage medium storing a computer readable program, wherein the computer readable program causes a terminal device (RSU or UE) to perform the method according to the first aspect of the embodiments.

The present application also provides a computer readable program, wherein the program, when executed in a scheduling entity (gNB or UE), causes the scheduling entity to perform the method according to the second aspect of the embodiments.

The present application also provides a storage medium storing a computer readable program, wherein the computer readable program causes a scheduling entity (gNB or UE) to perform the method according to the second aspect of the embodiments.

The above apparatus and method of the present application may be implemented by hardware, or may be implemented by hardware in combination with software. The present application relates to a computer readable program which, when executed by a logic means, enables the logic means to carry out the apparatus or constituent means described above, or enables the logic means to carry out the various methods or steps described above. The present application also relates to a storage medium such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like for storing the above program.

The methods/apparatus described in connection with the embodiments of the application may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. One or more of the functional blocks shown in the figures and/or one or more combinations of the functional blocks may correspond to software modules or hardware modules of the computer program flow. These software modules may correspond to the individual steps shown in the figures, respectively. These hardware modules may be implemented, for example, by solidifying the software modules using a Field Programmable Gate Array (FPGA).

A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium; or the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The software modules may be stored in the memory of the mobile terminal or in a memory card that is insertable into the mobile terminal. For example, if the apparatus (e.g., mobile terminal) employs a MEGA-SIM card of a relatively large capacity or a flash memory device of a large capacity, the software module may be stored in the MEGA-SIM card or the flash memory device of a large capacity.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof for use in performing the functions described herein. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP communication, or any other such configuration.

While the application has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this application will occur to those skilled in the art in light of the spirit and principles of this application, and such modifications and alterations are also within the scope of this application.

Regarding the above-described implementation of the embodiment of the present application, the following supplementary notes are also disclosed:

1. A perception-based semi-persistent scheduling method, wherein the method comprises:

2. The method according to appendix 1, wherein,

the information reflecting the wireless channel state is a Reference Signal Received Power (RSRP) map, the RSRP map indicates that the receiving end device receives a side link control information (SCI) within a period of time before a current message period, and when a resource unit to be reserved by a terminal device sending the SCI corresponds to a time-frequency resource in a current resource reservation window, the RSRP map forms an average RSRP on a resource block of a transmission block for transmitting the SCI;

the information reflecting the channel quality is a side link received signal strength indication (S-RSSI) map indicating a linear average of the sampled S-RSSI of each sub-channel with the message period (T) as a period, the S-RSSI being sensed by the receiving end device for a period of time prior to the current message period (T).

3. The method of supplementary note 2, wherein,

the receiving end device sends the RSRP map and/or the S-RSSI map and an index (T3) of a starting time unit of a current message period to the scheduling entity, the scheduling entity performs scheduling time window alignment according to the index of the starting time unit and performs side link resource reservation according to the RSRP map and/or the S-RSSI map, and the scheduling entity is network equipment or transmitting end equipment.

4. The method of supplementary note 2, wherein,

the RSRP map comprises a plurality of elements, each element corresponds to time-frequency resources in a resource reservation window, and the element values of the elements are as follows: the receiving end device receives the SCI in a sensing period (Tsense), and when the terminal device of the SCI sends the time-frequency resource to be reserved, the average RSRP on the corresponding resource blocks forming the transmission block for transmitting the SCI;

the S-RSSI map comprises a plurality of elements, each element corresponds to time-frequency resources in a resource reservation window, and the element values of the elements are as follows: the S-RSSI of each sub-channel at each time unit within a sensing period (Tsense) is sampled with the message period (T) as a linear average value;

Wherein the sensing period does not comprise a current message period (T).

5. The method of supplementary note 4, wherein if the receiving device is in a transmitting state during the period of time or during a certain time unit or certain time units within the sensing period, an element on the RSRP map and/or the S-RSSI map corresponding to the certain time unit or certain time units is a predetermined value, where the predetermined value indicates that the sensing is not performed.

6. The method of supplementary note 4, wherein the time unit is a frame, a subframe, a slot, or a sub-slot.

7. The method according to supplementary note 2, wherein the receiving end device generates the RSRP map and/or the S-RSSI map per the message period (T), and the receiving end device sends the RSRP map and/or the S-RSSI map per the message period (T) to the scheduling entity.

8. The method according to any one of supplementary notes 2 to 7, wherein,

the RSRP map is in the form of: text, table, map, vector, array, or matrix;

the S-RSSI map is in the form of: text, table, map, vector, array, or matrix.

9. The method according to any one of supplementary notes 1 to 7, wherein the receiving end device is an RSU in a V2I scene, and the transmitting end device is a vehicle in a V2I scene; or the receiving end device is a receiving end in a V2V scene, and the transmitting end device is a transmitting end in the V2V scene.

10. A perception-based semi-persistent scheduling method, wherein the method comprises:

11. The method of supplementary note 10, wherein,

the information reflecting the wireless channel state is an RSRP map, the RSRP map indicates that the receiving end device receives the side link control information (SCI) within a period of time before the current message period, and when the resource unit to be reserved by the terminal device sending the SCI corresponds to the time-frequency resource in the current resource reservation window, the average RSRP on the resource blocks forming the transmission block for transmitting the SCI;

the information reflecting the channel quality is an S-RSSI map, and the S-RSSI map indicates a linear average value of S-RSSIs of all sub-channels sensed by the receiving end equipment in a period of time before a current message period (T) and sampled by taking the message period (T) as a period;

The scheduling entity is a transmitting end device or a network device.

12. The method of supplementary note 11, wherein the scheduling entity performs an edge link resource reservation for a sender device, including,

the scheduling entity aligns the position of the RSRP map and/or the S-RSSI map with the scheduling resource grid of the scheduling entity according to the index (T3) of the start time unit;

the scheduling entity allocates an edge link resource for the sender device according to an RSRP element and/or an S-RSSI element in a selection window, wherein the selection window is after the current time and before the next message period, and the selection window comprises a plurality of time units.

13. The method according to supplementary note 12, wherein the index (T3) of the start time unit has the following relation to the index (Now) of the current time: and the Now-T is less than or equal to T3 and less than Now, and T is the message period.

14. The method of supplementary note 12, wherein each time unit of the selection window corresponds to an RSRP element and an S-RSSI element, and the scheduling entity allocates an edge link resource to the transmitting device according to the RSRP element and the S-RSSI element in the selection window.

15. The method of supplementary note 12, wherein a part of time units in the selection window correspond to RSRP elements and/or S-RSSI elements, another part of time units do not correspond to RSRP elements and S-RSSI elements, and the scheduling entity uses RSRP elements and/or S-RSSI elements of a part of the RSRP map and/or S-RSSI map of the message period before the current message period, which overlap the selection window, as RSRP elements and/or S-RSSI elements in the selection window, and allocates an edge link resource for the transmitting end device according to the adjusted RSRP elements and/or S-RSSI elements in the selection window.

16. The method of supplementary note 12, wherein the scheduling entity calculates an RSRP maximum value and/or an S-RSSI average value for resource units consisting of consecutive L sub-channels of the same time unit within a selection window, generates an RSRP matrix and/or an S-RSSI matrix for each resource unit, and allocates an edge link resource for a transmitting device according to the RSRP matrix and/or the S-RSSI matrix.

17. The method according to any one of supplementary notes 10-15, wherein the receiving end device is an RSU in a V2I scene and the transmitting end device is a vehicle in a V2I scene; or the receiving end device is a receiving end in a V2V scene, and the transmitting end device is a transmitting end in the V2V scene.

Claims

1. A perception-based semi-persistent scheduling apparatus configured in a receiving device, the apparatus comprising:

a transmitting unit, configured to transmit the information reflecting the radio channel state and/or the channel quality as auxiliary information to a scheduling entity, where the scheduling entity performs an edge link resource reservation for a transmitting end device according to the auxiliary information;

The information reflecting the wireless channel state is a reference signal receiving power map, the reference signal receiving power map indicates that the receiving end device receives the side link control information within a period of time before the current message period, and when a resource unit to be reserved by the terminal device sending the side link control information corresponds to a time-frequency resource in the current resource reservation window, average reference signal receiving power on a resource block forming a transmission block for transmitting the side link control information;

the information reflecting the channel quality is a side link received signal strength indication map, the side link received signal strength indication map indicates a linear average value of side link received signal strength indications of all sub-channels sensed by the receiving end device in a period of time before a current message period, wherein the linear average value is sampled by taking the message period as a period;

the sending unit sends the reference signal received power map and/or the side link received signal strength indication map and the index of the starting time unit of the current message period to the scheduling entity, the scheduling entity performs scheduling time window alignment according to the index of the starting time unit, and performs side link resource reservation according to the reference signal received power map and/or the side link received signal strength indication map, and the scheduling entity is network equipment or sending end equipment.

2. The apparatus of claim 1, wherein,

the reference signal receiving power map comprises a plurality of elements, each element corresponds to a time-frequency resource in a resource reservation window, and the element values of the elements are as follows: the receiving end equipment receives the side link control information in a sensing period, and when the terminal equipment for transmitting the side link control information reserves the time-frequency resource, the average reference signal receiving power on the corresponding resource blocks forming the transmission block for transmitting the side link control information;

the side link received signal strength indication map comprises a plurality of elements, each element corresponds to a time-frequency resource in a resource reservation window, and the element values of the elements are as follows: a linear average of the sensed signal strength indications of the sidelink received signal for each subchannel over each time unit over the message period;

wherein the sensing period does not include a current message period.

3. The apparatus of claim 2, wherein if the receiving end device is in a transmit state for a certain time unit or certain time units within the period of time or the sensing period, an element value on the reference signal received power map and/or a side link received signal strength indication map corresponding to the certain time unit or certain time units is a predetermined value, the predetermined value indicating that it is not sensed.

4. A semi-persistent scheduling device based on awareness, configured to a scheduling entity, the device comprising:

a receiving unit that receives information reflecting a wireless channel state and/or channel quality from a receiving end device, and an index of a start time unit corresponding to the information reflecting the wireless channel state and/or channel quality; and

a processing unit, which performs an edge link resource reservation for the transmitting end device according to the information reflecting the wireless channel state and/or the channel quality;

the information reflecting the wireless channel state is a reference signal receiving power map, the reference signal receiving power map indicates that the receiving end device receives the side link control information within a period of time before the current message period, and when a resource unit to be reserved by the terminal device sending the side link control information corresponds to a time-frequency resource in the current resource reservation window, the average reference signal receiving power on a resource block of a transmission block for transmitting the side link control information is formed;

the information reflecting the channel quality is a side link received signal strength indication map, the side link received signal strength indication map indicates a linear average value of side link received signal strength indications of all sub-channels sensed by the receiving end device in a period of time before a current message period, wherein the linear average value is sampled by taking the message period (T) as a period;

Wherein, the scheduling entity is a transmitting end device or a network device;

the processing unit includes:

an alignment unit that aligns the position of the reference signal received power map and/or the side link received signal strength indication map with the scheduling resource grid of the scheduling entity according to the index of the start time unit; and

an allocation unit that allocates an edge link resource to a transmitting end device according to a reference signal received power element and/or an edge link received signal strength indication element within a selection window that is after a current time and before a next message period, and that includes a plurality of time units within the selection window.

5. The apparatus of claim 4, wherein each time unit of the selection window corresponds to a reference signal received power element and/or an edge link received signal strength indicator element, and the allocation unit allocates an edge link resource to a transmitting device according to the reference signal received power element and/or the edge link received signal strength indicator element within the selection window.

6. The apparatus according to claim 4, wherein a part of time units in the selection window corresponds to a reference signal received power element and/or an edge link received signal strength indication element, another part of time units does not correspond to a reference signal received power element and/or an edge link received signal strength indication element, and the allocation unit allocates an edge link resource to a transmitting end device according to the adjusted reference signal received power element and/or edge link received signal strength indication element in the selection window by using the reference signal received power map and/or the edge link received signal strength indication element of a message period before the current message period.

7. The apparatus of claim 4, wherein an index T3 of the start time unit has the following relationship with an index Now of a current time: and the Now-T is less than or equal to T3 and less than Now, and T is the message period.

8. The apparatus of claim 4, wherein the allocation unit calculates a reference signal received power maximum and/or an S-RSSI average for resource elements within a selection window that are comprised of consecutive L sub-channels of a same time unit, generates a reference signal received power matrix and/or an S-RSSI matrix for each resource element, and allocates an edge link resource for a transmitting device according to the reference signal received power matrix and/or the S-RSSI matrix.

9. The apparatus of any of claims 4-8, wherein the receiving end device is an RSU in a V2I scene and the transmitting end device is a vehicle in a V2I scene; or the receiving end device is a receiving end in a V2V scene, and the transmitting end device is a transmitting end in the V2V scene.