WO2019219017A1

WO2019219017A1 - Method and device for feeding back information and determining information reception by means of feedback

Info

Publication number: WO2019219017A1
Application number: PCT/CN2019/086916
Authority: WO
Inventors: 冯媛; 彭莹; 赵锐; 郑石磊
Original assignee: 电信科学技术研究院有限公司
Priority date: 2018-05-15
Filing date: 2019-05-14
Publication date: 2019-11-21
Also published as: CN110492977B; CN110492977A

Abstract

Disclosed in the present application is a method and device for feeding back information and determining the information reception by means of feedback. The method comprises: receiving information at a PC5 interface; providing feedback according to an information reception state; sending the information at the PC5 interface; and determining the information reception state according to the feedback. Because feedback is provided according to the information reception state after the information is received at the PC5 interface, and a sending end determines the information reception state according to the feedback after sending the information at the PC5 interface, the present application solves the problem of no feedback for information sent at the PC5 interface.

Description

Method and device for feeding back information and determining information reception through feedback

This application claims the priority of the Chinese patent application filed on May 15, 2018, the Chinese Patent Office, the application number is 201810463737.5, and the application is entitled "Feedback to Information and Method and Equipment for Receiving Information by Feedback". This is incorporated herein by reference.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and device for feeding back information and determining information reception through feedback.

Background technique

In the existing Long Term Evolution (LTE) vehicle to Everything (V2X) technology (Rel-14 LTE V2X technology), data is transmitted between a User Equipment (UE) and a UE. The PC5 interface (also referred to herein as a straight-through link, described as Sidelink on the protocol) already supports basic road-based traffic-based services, and is primarily intended for service packets between 50-1200 bytes in size, required services. The reliability of the transmission within the specified coverage is greater than 95%. The basic scheduling mechanism is a sensing-based semi-persistent scheduling (SPS) + probability P.

With the further development of the Internet of Vehicles technology, new application scenarios have emerged, such as vehicle formation, advanced driving, sensor information sharing, and remote control applications. Some of these applications require communication between UEs within a group, or unicast communication between two UEs. These applications put forward higher requirements for the through link between the UE and the UE, requiring larger data packets to be carried, higher transmission reliability, and longer transmission distance. Existing LTE V2X technologies cannot meet the needs of new citations.

The existing LTE V2X technology is mainly for broadcast security services without any adaptive mechanism. In unicast and multicast mode, some adaptations can be considered, such as adaptive transmission and modulation coding (Modulation and Coding Scheme, MCS). Adaptive, etc. to improve system capacity and improve system reliability, we need to consider the corresponding feedback mechanism. Even for broadcast, the existing SPS mechanism still has the risk of continuous collision, and the feedback mechanism can also reduce the probability of continuous collision. .

For the SPS resource scheduling mode, a fixed number of transmissions is used, and redundant transmission causes unnecessary interference of the system. The second is not enough to send and can not receive correctly. In addition, for the SPS mechanism, although the prior art uses the probability P to reduce the continuous collision as much as possible, this mechanism is an uncertain mechanism, but it may reduce the probability and cannot avoid the occurrence of continuous collision as much as possible. For Dynamic Scheduling (DS), existing mechanisms are not considered.

Regardless of which of the above methods, feedback can be considered. However, the shortcoming of the prior art is that the current PC5 port feedback channel is blank, that is, the PC5 interface does not consider feedback at present.

Summary of the invention

The present application provides a method and a device for feeding back information and receiving information through feedback to solve the problem that the information sent on the PC 5 port has no feedback.

In a first aspect, a method for feeding back information is provided in the embodiment of the present application, including:

Receiving information on the PC5 interface;

Feedback is based on the information received.

In an implementation, an optional implementation manner is: performing the feedback according to the information receiving situation, including:

The feedback resources corresponding to the resources of the information received by the PC5 interface are not one-to-one corresponding dedicated resources, and are fed back by broadcast and/or multicast by using pulse energy;

The feedback resources corresponding to the resources of the information received on the PC5 interface are one-to-one corresponding dedicated resources, and are fed back by unicast and/or multicast in a signal manner.

In an implementation manner, an optional implementation manner is: when the feedback resource corresponding to the resource that is received by the PC5 interface is not a one-to-one dedicated resource:

Leaving the last symbol before the GP in the frame structure of the frame in which the message is received to the feedback, or leaving the last half of the time domain or a specific number of REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the received message is located.

Feedback is performed after each feedback or each TB defines a feedback resource, wherein when feedback is made for each transmission, a feedback channel is selected for each transmission, and feedback is performed; when feedback is performed for each TB, the TB corresponding is selected. The feedback channel provides corresponding feedback for all transmissions of the TB.

In the multicast mode, positive feedback is sent or negative feedback is sent; in the broadcast mode, negative feedback is sent; where positive feedback is feedback after receiving the information correctly, and negative feedback is performed after the information is not correctly received or not received. feedback of.

In an implementation, an optional implementation manner further includes:

The energy control is performed when negative or positive feedback is sent, so that the feedback information sent by the feedback senders of different distances by the feedback arrives at the received power of the respondent is consistent.

In the broadcast or multicast mode, feedback is provided on the information of the resource that exceeds the RSRP resource exclusion threshold.

In an implementation, an optional implementation manner is: when the feedback resource corresponding to the resource that is received by the PC5 interface is a dedicated resource corresponding to one-to-one:

Feedback is provided according to the resources pre-configured by the system. For unicast, the connected users are fed back through the connected resources. For multicast, feedback is provided for the different feedback terminals through corresponding resources.

Feedback is performed using a channel frame structure of a self-contained structure; wherein predetermined symbols in the frame structure are left for feedback, or a half-symbol or a specific number of REs in the time domain are left to feedback; and/or,

Feedback is performed using a channel frame structure that is not self-contained; wherein, feedback is made for each TB in a preset time domain and/or frequency domain.

In an implementation, an optional implementation manner is: performing feedback on each TB in a preset time domain and/or frequency domain, including:

Feedback for each transmission of one TB or each TB in a preset time domain and/or frequency domain;

The preset time domain is a time domain resource with a fixed time interval;

The preset frequency domain is one or more PRBs fixed in a frequency domain location.

In a second aspect, a method for determining information reception by feedback is provided in the embodiment of the present application, including:

Send information on the PC5 interface;

The information reception status is determined based on the feedback.

In an implementation manner, an optional implementation manner is that the feedback resource corresponding to the resource that is sent by the information on the PC5 interface is not a one-to-one dedicated resource, and the feedback is performed by using a pulse energy method by using broadcast and/or multicast;

The feedback resources corresponding to the resources on which the information sent by the PC5 interface is located are not one-to-one corresponding dedicated resources, and the feedback is fed back by unicast and/or multicast in a signal manner.

In an implementation manner, an optional implementation manner is: when the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one dedicated resource:

Leaving the last symbol before the GP in the frame structure of the frame in which the message is sent to the feedback, or leaving the last half of the time domain or a specific number of REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the message is sent.

In an implementation, an optional implementation manner is: when the feedback is performed by using the broadcast, the feedback is performed by the information receiving end according to the sum of the MAC ID of the terminal that performs feedback and the number of REs of the PSSCH corresponding to the received TB. The modulo operation determines the RE of the feedback, or randomly selects an RE for feedback.

In the multicast mode, according to the received positive feedback/negative feedback, it is determined that the negative feedback accounts for all the proportions to be fed back; for the broadcast mode, the negative feedback is received; wherein the positive feedback is the feedback after the correct reception of the information, and the negative feedback Is feedback that is not received correctly or that has not been received;

The final feedback result is determined according to the proportion of negative feedback in the multicast mode to all the feedbacks to be fed back or the number of negative feedbacks in the broadcast mode.

In an implementation, an optional implementation manner further includes:

The number of users who determine positive feedback or negative feedback by the amount of energy.

In the implementation, when the feedback resource corresponding to the resource that is sent by the information sent by the PC5 interface is not a dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, and the maximum number of transmissions is not exceeded, and no ACK is received, the service is retransmitted; otherwise, the cache is released; and/or,

If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.

In an implementation, an optional implementation manner is: when the feedback resource corresponding to the resource that is received by the information on the PC5 interface is a one-to-one corresponding dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, the maximum number of transmissions is not exceeded, and no ACK is received, the feedback is continuously sent; otherwise, the cache is released; and/or,

In a third aspect, a communications device is provided in the embodiment of the present application, including:

A processor for reading a program in the memory, performing the following process:

Data processing according to the needs of the transceiver;

A transceiver for receiving and transmitting data under the control of a processor, performing the following processes:

Receiving information on the PC5 interface;

Feedback is based on the information received.

In an implementation, an optional implementation manner is: when the feedback is performed according to the information receiving situation, the transceiver is specifically configured to:

In an implementation, an optional implementation manner further includes:

In an implementation, an optional implementation manner is: when the feedback resource corresponding to the resource that is received by the PC5 interface is not a dedicated resource:

The preset time domain is a time domain resource with a fixed time interval;

In a fourth aspect, a communications device is provided in the embodiment of the present application, including:

Data processing according to the needs of the transceiver;

Send information on the PC5 interface;

The information reception status is determined based on the feedback.

In an implementation, an optional implementation manner further includes:

In an implementation, an optional implementation manner is: when the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a dedicated resource, the method further includes:

In a fifth aspect, an apparatus for feeding back information is provided in the embodiment of the present application, including:

a receiving module, configured to receive information on the PC5 interface;

A feedback module for feedback based on information reception.

In a sixth aspect, an apparatus for determining information reception by feedback is provided in the embodiment of the present application, including:

a sending module, configured to send information on the PC5 interface;

A determining module for determining information reception based on the feedback.

In a seventh aspect, the embodiment of the present application provides a computer readable non-volatile storage medium, where the computer program is stored, and when the computer program is executed by a processor, the method of any one of the foregoing first aspects is implemented. A step, or a step of implementing the method of any of the above second aspects.

The beneficial effects of the application are as follows:

In the technical solution provided by the present application, since the information is received on the PC5 interface, feedback is performed according to the information reception situation. After the sender sends information on the PC5 interface, the information is received according to the feedback. Thereby solving the problem that the information sent on the PC5 port has no feedback.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a schematic flowchart of a method for implementing feedback on receiving information on a feedback end according to an embodiment of the present application;

2 is a schematic flowchart of a method for implementing a method for receiving information by feedback on a feedback end according to an embodiment of the present application;

3 is a schematic diagram of a self-contained structure in TDD in the embodiment of the present application;

4 is a schematic structural diagram of a communication device as an information sending end according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a communication device as an information receiving end in the embodiment of the present application.

Detailed ways

The specific embodiments of the present application will be described below with reference to the accompanying drawings.

In the description process, the implementation of the information sending end and the information receiving end respectively will be described. The information sending end refers to the end that receives the feedback after transmitting the information, and the corresponding one in the implementation is called the feedback end/transmitting end, and the information receiving end is It refers to the end that sends the feedback after receiving the information, and the corresponding one is called the feedback end/receiver end in the implementation, and then the examples of the two are implemented together to better understand the implementation of the solution given in the embodiment of the present application. Such a description does not mean that the two must cooperate with the implementation, or must be implemented separately. In fact, when the information transmitting end and the information receiving end are implemented separately, they also solve the problems of the information transmitting end and the information receiving end, respectively. When combined, you get better technical results.

The scheme provided at the information receiving end is as follows:

FIG. 1 is a schematic flowchart of a method for performing feedback on receiving information on a feedback end, as shown in the figure, including:

Step 101: Receive information on a PC5 interface.

Step 102: Perform feedback according to the information receiving situation.

Correspondingly, the solution provided at the information sending end is as follows:

FIG. 2 is a schematic flowchart of a method for implementing information reception by feedback on a feedback end, as shown in the figure, including:

Step 201: Send information on the PC5 interface.

Step 202: Determine information receiving status according to the feedback.

The concepts involved in the specific implementation will be described below.

There are two forms of implementation:

Manner 1: There is no way to allocate dedicated resource feedback to the feedback end using pulse energy.

Manner 2: The feedback terminal is also allocated a dedicated resource; that is, each resource can know the feedback vehicle, and the feedback can be sent by different signals.

Specifically, the manner of sending feedback can be as follows:

Unicast: The feedback end allocates dedicated resources, that is, the feedback end and the feedback resource have certain mapping resources, and the feedback can adopt different signal transmission methods. For unicast, it is necessary to know clearly whether each feedback feedback is positive feedback or negative feedback, so this method can be used.

Multicast: There is no dedicated resource on the feedback side, and the feedback uses pulse energy. Or the dedicated resource is allocated to the feedback end, that is, the feedback end and the feedback resource have a certain mapping resource, and the feedback may adopt a different signal transmission manner.

Broadcast: There is no dedicated resource on the feedback side, and the feedback uses pulse energy. For broadcasts, there are too many feedback ends, and it is too expensive to allocate dedicated resources for each one. Therefore, this method can be adopted.

For the self-contained structure involved in the implementation, the self-contained structure is proposed in the NR. The self-contained structure is in a sub-frame, the data is returned from the source to the end, and then from the end, that is, bidirectional transmission; at least in the NR Four symbols: DL control (downlink control), DATA (data), GAP (gap), and UL control (uplink control). For details, see FIG. 3, which is a schematic diagram of a self-contained structure in TDD.

The following is explained:

Manner 1: The feedback resources corresponding to the resources that are received by the information on the PC5 interface are not one-to-one dedicated resources, and are fed back by broadcast and/or multicast using pulse energy.

Manner 2: The feedback resources corresponding to the resources received by the information on the PC5 interface are one-to-one corresponding dedicated resources, and are fed back by unicast and/or multicast in a signal manner.

1. The implementation of mode one can be as follows:

The dedicated resources are not allocated to the feedback end. For each transport block (TB) or one feedback resource for each transmission, the implementation method applicable to the feedback end may be: for the energy mode, the pulse is sent, and the sender is not required to be indicated. .

In the implementation, when the feedback resource corresponding to the resource that is received by the information on the PC5 interface is not a one-to-one corresponding dedicated resource:

The last symbol before the GP in the frame structure in the frame in which the message is received is left for feedback, or the last half symbol in the time domain or a specific number of REs in the frame structure is left for feedback.

In addition, in the embodiment of the present invention, a non-self-contained structure may be adopted, and in this manner, the system has a mapping manner. When the frame in which the received message does not contain the feedback resource, the feedback is performed in the frame with the feedback resource corresponding to the frame where the received message is located according to the preset mapping manner.

For example, when the frame in which the received message does not contain the feedback resource, the feedback is performed in the frame with the latest reserved feedback resource according to the preset mapping manner.

Correspondingly, the end that accepts feedback can be implemented as follows:

When the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one dedicated resource:

Leave the last symbol before the GP in the frame structure for feedback, or leave the last half of the time domain or a specific number of REs in the frame structure for feedback.

In addition, there is a mapping method when the non-self-contained structure is adopted. When the frame in which the message is sent does not include the feedback resource, the feedback is performed in the frame with the feedback resource corresponding to the frame where the message is sent according to the preset mapping mode.

For example, when the frame in which the message is sent does not include the feedback resource, the feedback is performed in the frame with the latest reserved feedback resource according to the preset mapping manner.

In a specific implementation, when performing feedback through multicast, the corresponding RE/RE group that performs feedback is determined according to the relative number of each RE in the RE set for feedback and the ID number in the group, or randomly selected. a feedback RE group for feedback;

When the feedback is performed by broadcasting, the RE for feedback is determined according to the relative number of each of the REs in the RE set for feedback, or one RE is randomly selected for feedback.

Correspondingly, the end that accepts feedback can be implemented as follows:

When the feedback is performed by the multicast, the feedback is that the information receiving end determines the corresponding RE of the terminal that performs the feedback according to the relative number of the received RE and the in-group ID number of the terminal that performs the feedback, or randomly selects one. RE for feedback;

When the feedback is performed by the broadcast, the feedback is performed by the information receiving end according to the sum of the media access control (MAC) ID of the terminal that performs feedback and the number of REs occupied by the PSSCH corresponding to the received TB. To determine the RE of the feedback, or randomly select an RE for feedback.

Specifically, a similar self-contained structure can be employed; feedback for each transmission.

Here, feedback is made for the physical side shared channel (PSSCH), that is, the PSCCH channel frame structure is not changed.

The last symbol before the guard time slot (Guard PeriodGP,) is reserved for feedback. Further, it may be considered that the last half symbol in the time domain or a specific resource element (RE) is left for feedback.

For a multicast UE, it is possible to determine the RE corresponding to the RE based on the RE relative number and its own intra-group ID number for feedback. It is also possible to randomly select an RE for feedback.

For the broadcast UE, one RE may be randomly selected, or the feedback RE may be determined according to the sum of the number of REs occupied by the own MAC ID and the PSSCH corresponding to the TB.

Correspondingly, the end that accepts feedback can be implemented as follows:

The feedback is that the information receiving end feeds back feedback resources for each transmission or each TB, wherein, for each transmission, feedback is selected for each transmission, and the feedback is performed by the information receiving end. When each TB performs feedback, the feedback channel corresponding to the last transmission is selected, and the corresponding feedback is made for the last transmission.

In a specific implementation, the positive feedback is sent or the negative feedback is sent because the feedback person knows how many members are in the group, and after knowing the number of users that should be fed back, only one of them needs to be fed back, and the respondent can know the situation being feedback; for example; 10 members in the group should feedback 9 and agree that only positive feedback will be used for feedback. When 7 are received, the remaining 2 are negative feedback.

Correspondingly, the end that accepts feedback can be implemented as follows:

Specifically, when determining according to the ratio, for example, determining a threshold of 80%, more than 80% of the positive feedback can be regarded as positive feedback.

In a specific implementation, the method further includes:

Specifically, when energy is used, there is no way of using dedicated resources, and each user's arrival energy is required to be the same, and the number of users can be obtained according to energy synthesis. For the signal mode, it is not necessary to reach the power value.

In the implementation, when the feedback resource corresponding to the resource that is received by the information on the PC5 interface is not a dedicated resource, the method further includes:

Specifically, in this example, a non-self-contained structure may be adopted. In this mode, the system has a mapping mode. Feedback resources are defined for each transmission or for each TB. There are two ways to do this: 1) define only one resource; 2) define positive and negative feedback resources.

Define a resource, that is, define a positive feedback resource, for example, if it is positive feedback, send feedback on the resource, if it is negative feedback, it will not send it;

Define positive and negative feedback resources, positive feedback resources and negative feedback resources are orthogonal. If it is positive feedback, send feedback on the positive feedback resource; if it is negative feedback, send feedback on the negative feedback resource;

Self-contained means that the sending resource and the feedback resource are in the same subframe. In the implementation, there is no such requirement, and the feedback end is not required to do feedback.

The difference from the self-contained mode only needs to consider a certain timing difference when the RE and the PSSCH are fed back, for example, 4 ms.

If only one feedback resource is defined, it can be selected in the same way as the feedback resource of the self-contained structure; if the positive and negative feedback resources are defined, the system needs to be set in advance, and different feedback groups, such as the first half of the frequency domain, are used for positive feedback. The latter half of the domain is used for negative feedback.

For the UE, which RE is specifically selected may be selected in the same manner as the self-contained structure.

For the feedback for each transmission, the feedback channel needs to be considered for each transmission. For each TB feedback, only the feedback channel corresponding to the last transmission can be considered, and only the corresponding feedback is needed for the last transmission. .

If feedback is needed for each transmission, feedback is sent for each transmission received; if feedback is made for each TB, only feedback is received on the last transmission received; specifically, SA decoding is successful, data is not necessarily If it succeeds, for the SA decoding success, feedback is made at the position of the corresponding feedback resource, or according to the SPS characteristic, the corresponding location of the transmission is determined, and then the position of the corresponding feedback resource is determined.

For the content to be sent: There are two implementation modes. In the multicast mode, only positive feedback can be sent. Because it is a certain receiving object, the ratio of positive feedback can be calculated or whether positive feedback is sent. Positive and negative feedback are sent, and then the ratio is obtained. For the broadcast mode, both positive and negative feedback can be sent. For both positive and negative feedback, different resources need to be defined for positive and negative feedback, so that the ratio can be obtained, or only the ratio can be obtained. Negative feedback;

Further, the vehicle user can perform power control: so that the number of negative feedback users (proportion) can be determined according to the magnitude of the energy, that is, the feedback power of the different users is required to be the same. If the TB has been successfully received and the feedback is for each transmission, then positive feedback or no feedback is made. If the TB is not received normally and the feedback is for each transmission, negative feedback is always required.

If no signal is sent, it can be determined by energy. It is assumed that the received power of each feedback is the same. Assuming Xdbm, the total energy received is Ydbm. Through Y/X, it can be determined that several users have sent it.

In the implementation, for the feedback end, whether the decision needs to be positive feedback or negative feedback, positive feedback means that no resource reselection or TB retransmission is needed, and negative feedback is needed.

The specific can be as follows:

Feedback: In the broadcast mode, not all nodes need feedback, and can be combined with the Reference Signal Received Power (RSRP) threshold. For example, vehicle nodes that exceed the RSRP resource exclusion threshold are considered for feedback.

Receiver: Determines whether it is positive feedback or negative feedback based on the energy calculation ratio, and then determines the specific behavior; for example:

(1) If the feedback is for one transmission and is not SPS, if the delay is not exceeded and the maximum number of transmissions is not exceeded, and no ACK feedback is received, the feedback is continuously sent; otherwise, the buffer is released. and / or,

(2) If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.

For the impact of resource selection, the effect of half-duplex frequency division resources can be considered. It is related to the specific location of the feedback channel. Specifically, the resource selection refers to the service channel, and the service packet is sent, and the feedback is also required to be sent. If the transmission capability is limited, it is assumed that only single carrier transmission is supported. In this case, a transmission time interval (TTI) is either Send feedback or send a traffic channel.

2. The implementation of Mode 2 can be as follows:

If dedicated resources are also allocated to the feedback end, feedback can be performed by means of unicast or multicast.

The feedback end implementation manner may be an implicit representation on the determined resource and sent to the UE, and the object of the feedback is represented by the system resource allocation. For unicast, only the user who establishes the connection can make feedback, and the feedback end can be directly learned. For multicast, the resource is used for multiple users, and different feedback terminals can be distinguished by different resource allocations and scrambling code design on the same resource. Equivalent to the system to allocate feedback dedicated resources in advance.

The difference from the mode one is that it is necessary for the UE to determine a unique RE, that is, it needs to be fed back according to a specific rule. For a unicast user, there is only one feedback user, and one RE can be randomly selected. For a multicast user, the corresponding RE can be determined according to the RE relative number and its own ID number. For example, the ID of the group ID and the total number of REs are modulo to obtain the corresponding ID.

In the implementation, when the feedback resources corresponding to the resources of the information received by the PC5 interface are one-to-one corresponding dedicated resources:

Correspondingly, the end that accepts feedback can be implemented as follows:

When the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is a one-to-one corresponding dedicated resource:

The feedback is fed back using a channel frame structure of the self-contained structure; wherein the predetermined symbols in the frame structure are left for feedback, or the upper half of the time domain or a certain number of REs in the frame structure are left for feedback; and / or,

The feedback is fed back using a channel frame structure that is not self-contained; wherein, feedback is made for each TB in a preset time domain and/or frequency domain.

Correspondingly, the end that accepts feedback can be implemented as follows:

The feedback is that the information receiving end feeds back feedback resources for each transmission or each TB, wherein, for each transmission, feedback is selected for each transmission, and the feedback is performed by the information receiving end. When each TB performs feedback, the feedback channel corresponding to the last transmission is selected, and corresponding feedback is sent to the last transmission.

In the implementation, when the feedback resource corresponding to the resource that is received by the information on the PC5 interface is a dedicated resource, the method further includes:

In the specific implementation, there are two implementation ways in the implementation of the feedback end:

1) adopt self-contained structure and similar structure, such as 1 symbol, half symbol is reserved for feedback, or specific RE is reserved for feedback; for self-contained structure, it is corresponding to each transmission of a certain TB;

2) Adopt non-self-contained but system-existing mapping mode; for example, it can be specially designed in time domain and frequency domain, for example, a physical resource block (physical resource block) fixed in the frequency domain at a fixed interval of 4ms in the time domain. PRB) or 2 PRBs, etc. Feedback may be made for the TB (as long as the transmission is successful) or for each transmission of the TB, which may depend on the design of the feedback channel. For each transmission of TB, it is possible to ensure that every TB is correctly received without continuous collision. For a TB (initial retransmission overall), the probability of continuous collision can be reduced as much as possible, and there is no guarantee that every TB will receive correctly.

In the feedback content sent, both positive and negative feedback can be sent. For positive and negative feedback, different signals are defined. Whether it is positive feedback or negative feedback, it needs to be sent out, or only positive feedback. If the feedback is for each transmission and the TB has been successfully received, then each reception after positive feedback is either positive feedback or no feedback. If the feedback is for each transmission and the TB is not receiving normally, and the feedback is for each transmission, negative feedback is always required. If the feedback is for the TB, the time at which the feedback channel is located must be the corresponding feedback based on the reception after the last transmission.

On the end of the transmitting end that receives the feedback, it is determined by the signal whether it is positive feedback or negative feedback. Specific behavior is related to feedback design:

(1) If the feedback is for one transmission and is not SPS, if the delay is not exceeded and the maximum number of transmissions is not exceeded, and no ACK feedback is received, the transmission is continued; otherwise, the buffer is released.

In terms of the impact on resource selection, the impact of half-duplex frequency division resources may need to be considered. This is related to the specific location of the feedback channel.

The following is a description of specific examples.

Example 1:

In this example, in the SPS mode, feedback (signal) is performed for the TB in a unicast manner.

The feedback channel can be in the form of presence mapping. That is, the feedback channel may be implicitly indicated. For example, corresponding to the Xth RE on the TTI corresponding to the 4ms of the last retransmission resource, X may be implemented by pre-configuration.

Condition for feeding back NACK (no feedback ACK): SA parsing succeeds, but data parsing fails; SA parsing fails, and the resource should be received according to the previous SCI; SA parsing succeeds, but not for the unicast user. Positive and negative feedback are sent separately according to the result. Positive and negative feedback correspond to different signals.

Then the vehicle can determine whether a collision may occur (no ACK feedback) based on the result of the feedback, thereby triggering reselection of the resource.

Example 2:

In this example, in the SPS mode, feedback (signal) is performed for the TB in a multicast manner.

The difference from Embodiment 1 is:

(1) The feedback channel needs to be distinguished by different users, and can be implemented by scrambling code design and feedback resource differentiation;

(2) The vehicle needs to determine whether it is necessary to perform resource reselection processing based on the result of the feedback.

Example 3:

In this example, in the SPS mode, feedback (energy) is performed for the TB using the multicast/broadcast mode.

The difference from Embodiment 1 is:

(1) Some users need to make feedback, such as the RSRP threshold, and only users with close proximity need to make feedback;

(2) Feedback needs to be power controlled;

(3) It can be sent both positive and negative feedback. For both positive and negative feedback, different resources need to be defined for positive and negative feedback, so that the ratio can also be obtained, or only negative feedback can be sent.

(4) The vehicle needs to determine whether it is necessary to perform resource reselection processing based on the result of the feedback.

Example 4:

In this example, feedback is made for each transmission of the TB.

The feedback channel can be implemented in two ways:

(1) self-contained structures and similar structures;

(2) Mapping structure; for unicast, multicast, and broadcast, the receiver determines the selection of the triggered retransmission resource according to the feedback result.

Based on the same inventive concept, the embodiment of the present application further provides a communication device, a device for feeding back information, and a device for determining information through feedback, because the device solves the problem and a pair of received information The means for performing feedback, and the method for determining the information reception by feedback are similar, and therefore the implementation of these devices can be referred to the implementation of the method, and the repeated description is not repeated.

FIG. 4 is a schematic structural diagram of a communication device as an information sending end. As shown in the figure, the device includes:

The processor 400 is configured to read a program in the memory 420 and perform the following process:

Data processing according to the needs of the transceiver;

The transceiver 410 is configured to receive and transmit data under the control of the processor 400, and performs the following processes:

Receiving information on the PC5 interface;

Feedback is based on the information received.

In an implementation, an optional implementation manner is: when the feedback is performed according to the information receiving situation, the transceiver 410 is specifically configured to:

In an implementation, an optional implementation manner is that the transceiver 410 is further configured to:

The preset time domain is a time domain resource with a fixed time interval;

Wherein, in FIG. 4, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 400 and various circuits of memory represented by memory 420. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 410 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 430 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 400 is responsible for managing the bus architecture and general processing, and the memory 420 can store data used by the processor 400 when performing operations.

FIG. 5 is a schematic structural diagram of a communication device as an information receiving end. As shown in the figure, the device includes:

The processor 500 is configured to read a program in the memory 520 and perform the following process:

Data processing according to the needs of the transceiver;

The transceiver 510 is configured to receive and transmit data under the control of the processor 500, and performs the following processes:

Send information on the PC5 interface;

The information reception status is determined based on the feedback.

In an implementation, an optional implementation manner further includes:

In FIG. 5, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 510 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 530 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

When the technical solution provided by the embodiment of the present application is implemented, it can be implemented as follows.

The apparatus of the present application further provides an apparatus for feeding back information, including:

a receiving module, configured to receive information on the PC5 interface;

A feedback module for feedback based on information reception.

For specific implementation, refer to the above implementation of feedback on receiving information.

An apparatus for determining information reception by feedback is further provided in the embodiment of the present application, including:

a sending module, configured to send information on the PC5 interface;

For a specific implementation, reference may be made to the above implementation of determining information reception by feedback.

For convenience of description, the various parts of the above described devices are described in terms of functions divided into various modules or units. Of course, the functions of each module or unit may be implemented in the same software or hardware in the implementation of the present application.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A method for feeding back information, characterized in that it comprises:

Receiving information on the PC5 interface;

Feedback is based on the information received.
The method of claim 1, wherein the feeding according to the information receiving situation comprises:

The feedback resources corresponding to the resources of the information received by the PC5 interface are not one-to-one corresponding dedicated resources, and are fed back by broadcast and/or multicast by using pulse energy;

The feedback resources corresponding to the resources of the information received on the PC5 interface are one-to-one corresponding dedicated resources, and are fed back by unicast and/or multicast in a signal manner.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Leaving the last symbol before the guard slot GP in the frame structure of the frame in which the message is received to the feedback, or leaving the last half symbol in the time domain or a certain number of resource unit REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the received message is located.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Feedback is performed after each feedback or each transport block TB defines a feedback resource, wherein when feedback is made for each transmission, a feedback channel is selected for each transmission and feedback is performed; when feedback is performed for each TB, the selection is performed. The feedback channel corresponding to the TB provides corresponding feedback for all transmissions of the TB.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the multicast mode, positive feedback is sent or negative feedback is sent; in the broadcast mode, negative feedback is sent; where positive feedback is feedback after receiving the information correctly, and negative feedback is performed after the information is not correctly received or not received. feedback of.
The method of claim 5, further comprising:

The energy control is performed when negative or positive feedback is sent, so that the feedback information sent by the feedback senders of different distances by the feedback arrives at the received power of the respondent is consistent.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the broadcast or multicast mode, feedback is provided on the information of the resource exceeding the reference signal receiving power RSRP resource exclusion threshold.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is provided according to the resources pre-configured by the system. For unicast, the connected users are fed back through the connected resources. For multicast, feedback is provided for the different feedback terminals through corresponding resources.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is performed using a channel frame structure of a self-contained structure; wherein predetermined symbols in the frame structure are left for feedback, or a half-symbol or a specific number of REs in the time domain are left to feedback; and/or,

Feedback is performed using a channel frame structure that is not self-contained; wherein, feedback is made for each TB in a preset time domain and/or frequency domain.
The method of claim 9, wherein the feedback is performed for each TB in a preset time domain and/or frequency domain, including:

Feedback for each transmission of one TB or each TB in a preset time domain and/or frequency domain;

The preset time domain is a time domain resource with a fixed time interval;

The preset frequency domain is one or more PRBs fixed in a frequency domain location.
The method according to claim 2, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is performed after each feedback or each TB defines a feedback resource, wherein when feedback is made for each transmission, a feedback channel is selected for each transmission, and feedback is performed; when feedback is performed for each TB, the TB corresponding is selected. The feedback channel provides corresponding feedback for all transmissions of the TB.
A method for determining information reception by feedback, comprising:

Send information on the PC5 interface;

The information reception status is determined based on the feedback.
The method of claim 12 wherein:

The feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one dedicated resource, and the feedback is performed by using broadcast energy and/or multicast by using pulse energy;

The feedback resources corresponding to the resources on which the information sent by the PC5 interface is located are not one-to-one corresponding dedicated resources, and the feedback is fed back by unicast and/or multicast in a signal manner.
The method according to claim 13, wherein when the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Leaving the last symbol before the GP in the frame structure of the frame in which the message is sent to the feedback, or leaving the last half of the time domain or a specific number of REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the message is sent.
The method according to claim 14, wherein when the feedback is performed by broadcasting, the feedback is the sum of the number of REs occupied by the information receiving end according to the MAC ID of the terminal performing feedback and the PSSCH corresponding to the received TB. A modulo operation is performed to determine the RE of the feedback, or a RE is randomly selected for feedback.
The method according to claim 13, wherein when the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the multicast mode, according to the received positive feedback or negative feedback, it is determined that the negative feedback accounts for all the proportions to be fed back; for the broadcast mode, the negative feedback is received; wherein the positive feedback is the feedback after the correct reception of the information, and the negative feedback Is feedback that is not received correctly or that has not been received;

The final feedback result is determined according to the proportion of negative feedback in the multicast mode to all the feedbacks to be fed back or the number of negative feedbacks in the broadcast mode.
The method of claim 16 further comprising:

The number of users who determine positive feedback or negative feedback by the amount of energy.
The method according to claim 13, wherein when the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a corresponding dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, and the maximum number of transmissions is not exceeded, and no ACK is received, the service is retransmitted; otherwise, the cache is released; and/or,

If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.
The method according to claim 13, wherein when the feedback resource corresponding to the resource that is received by the information on the interface of the PC5 is a one-to-one corresponding dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, the maximum number of transmissions is not exceeded, and no ACK is received, the feedback is continuously sent; otherwise, the cache is released; and/or,

If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.
A communication device, comprising:

A processor for reading a program in the memory, performing the following process:

Data processing according to the needs of the transceiver;

A transceiver for receiving and transmitting data under the control of a processor, performing the following processes:

Receiving information on the PC5 interface;

Feedback is based on the information received.
The device according to claim 20, wherein when the feedback is performed according to the information receiving situation, the transceiver is specifically configured to:

The feedback resources corresponding to the resources of the information received by the PC5 interface are not one-to-one corresponding dedicated resources, and are fed back by broadcast and/or multicast by using pulse energy;

The feedback resources corresponding to the resources of the information received on the PC5 interface are one-to-one corresponding dedicated resources, and are fed back by unicast and/or multicast in a signal manner.
The device according to claim 21, wherein the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Leaving the last symbol before the GP in the frame structure of the frame in which the message is received to the feedback, or leaving the last half of the time domain or a specific number of REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the received message is located.
The device according to claim 21, wherein the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Feedback is performed after each feedback or each TB defines a feedback resource, wherein when feedback is made for each transmission, a feedback channel is selected for each transmission, and feedback is performed; when feedback is performed for each TB, the TB corresponding is selected. The feedback channel provides corresponding feedback for all transmissions of the TB.
The device according to claim 21, wherein the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the multicast mode, positive feedback is sent or negative feedback is sent; in the broadcast mode, negative feedback is sent; where positive feedback is feedback after receiving the information correctly, and negative feedback is performed after the information is not correctly received or not received. feedback of.
The device according to claim 24, wherein said transceiver is further configured to:

The energy control is performed when negative or positive feedback is sent, so that the feedback information sent by the feedback senders of different distances by the feedback arrives at the received power of the respondent is consistent.
The device according to claim 21, wherein the feedback resource corresponding to the resource where the information received by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the broadcast or multicast mode, feedback is provided on the information of the resource that exceeds the RSRP resource exclusion threshold.
The device according to claim 21, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is provided according to the resources pre-configured by the system. For unicast, the connected users are fed back through the connected resources. For multicast, feedback is provided for the different feedback terminals through corresponding resources.
The device according to claim 21, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is performed using a channel frame structure of a self-contained structure; wherein predetermined symbols in the frame structure are left for feedback, or a half-symbol or a specific number of REs in the time domain are left to feedback; and/or,

Feedback is performed using a channel frame structure that is not self-contained; wherein, feedback is made for each TB in a preset time domain and/or frequency domain.
The device according to claim 28, wherein the feedback is performed for each TB in a preset time domain and/or frequency domain, including:

Feedback for each transmission of one TB or each TB in a preset time domain and/or frequency domain;

The preset time domain is a time domain resource with a fixed time interval;

The preset frequency domain is one or more PRBs fixed in a frequency domain location.
The device according to claim 21, wherein when the feedback resource corresponding to the resource where the information received by the PC5 interface is located is a one-to-one corresponding dedicated resource:

Feedback is performed after each feedback or each TB defines a feedback resource, wherein when feedback is made for each transmission, a feedback channel is selected for each transmission, and feedback is performed; when feedback is performed for each TB, the TB corresponding is selected. The feedback channel provides corresponding feedback for all transmissions of the TB.
A communication device, comprising:

A processor for reading a program in the memory, performing the following process:

Data processing according to the needs of the transceiver;

A transceiver for receiving and transmitting data under the control of a processor, performing the following processes:

Send information on the PC5 interface;

The information reception status is determined based on the feedback.
The device of claim 31, wherein

The feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one dedicated resource, and the feedback is performed by using broadcast energy and/or multicast by using pulse energy;

The feedback resources corresponding to the resources on which the information sent by the PC5 interface is located are not one-to-one corresponding dedicated resources, and the feedback is fed back by unicast and/or multicast in a signal manner.
The device according to claim 32, wherein the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

Leaving the last symbol before the GP in the frame structure of the frame in which the message is sent to the feedback, or leaving the last half of the time domain or a specific number of REs in the frame structure to the feedback; or

According to the preset mapping manner, feedback is performed in a frame reserved with a feedback resource corresponding to the frame in which the message is sent.
The device according to claim 33, wherein when the feedback is performed by broadcasting, the feedback is the sum of the number of REs occupied by the information receiving end according to the MAC ID of the terminal that performs feedback and the PSSCH corresponding to the received TB. A modulo operation is performed to determine the RE of the feedback, or a RE is randomly selected for feedback.
The device according to claim 32, wherein the feedback resource corresponding to the resource where the information sent by the PC5 interface is located is not a one-to-one corresponding dedicated resource:

In the multicast mode, according to the received positive feedback or negative feedback, it is determined that the negative feedback accounts for all the proportions to be fed back; for the broadcast mode, the negative feedback is received; wherein the positive feedback is the feedback after the correct reception of the information, and the negative feedback Is feedback that is not received correctly or that has not been received;

The final feedback result is determined according to the proportion of negative feedback in the multicast mode to all the feedbacks to be fed back or the number of negative feedbacks in the broadcast mode.
The device of claim 35, further comprising:

The number of users who determine positive feedback or negative feedback by the amount of energy.
The device according to claim 32, wherein when the feedback resource corresponding to the resource that is sent by the interface of the PC5 is not a one-to-one dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, and the maximum number of transmissions is not exceeded, and no ACK is received, the service is retransmitted; otherwise, the cache is released; and/or,

If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.
The device according to claim 32, wherein when the feedback resource corresponding to the resource that is received by the information on the interface of the PC5 is a one-to-one corresponding dedicated resource, the method further includes:

If the feedback is for one transmission and is not SPS, if the delay is not exceeded, the maximum number of transmissions is not exceeded, and no ACK is received, the feedback is continuously sent; otherwise, the cache is released; and/or,

If the feedback is for TB and is SPS mode, SPS resource reselection is triggered.
An apparatus for feeding back information, comprising:

a receiving module, configured to receive information on the PC5 interface;

A feedback module for feedback based on information reception.
An apparatus for determining information reception by feedback, comprising:

a sending module, configured to send information on the PC5 interface;

A determining module for determining information reception based on the feedback.
A computer readable non-volatile storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the steps of the method of any one of claims 1 to 11, or to implement a right The method of any one of 12 to 19 is required.