CN110972301B

CN110972301B - Unicast resource allocation method and device

Info

Publication number: CN110972301B
Application number: CN201811189902.9A
Authority: CN
Inventors: 冯媛; 郑方政; 赵锐; 李晨鑫
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-09-28
Filing date: 2018-10-12
Publication date: 2022-03-29
Anticipated expiration: 2038-10-12
Also published as: CN110972301A

Abstract

The embodiment of the invention provides a unicast resource allocation method and a device, wherein the method comprises the following steps: receiving information of the first unicast resource from the second node, wherein the first unicast resource and the corresponding transmission parameter are determined by the second node for the first node according to the perception information of the second node and the service-related information of the first node, or determining a second unicast resource of the first node and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node. In the embodiment of the invention, the first node receives the information of the first unicast resource from the second node, or the first node determines the second unicast resource of the first node and adjusts the subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node, thereby realizing the unicast communication between the UE.

Description

Unicast resource allocation method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a unicast resource allocation method and equipment.

Background

Vehicle-to-outside information exchange (V2X) technology can sense the surrounding conditions of vehicles in real time, share road information and perform early warning in time by means of wireless communication between vehicles, Vehicle-to-drive test infrastructure, and vehicles and pedestrians, and has become a research hotspot for solving the problem of road safety in countries in the world at present.

In the existing Long Term Evolution (LTE) V2X technology (e.g., release 14(Rel-14) LTE V2X technology), a PC5 interface (also referred to as a direct link, described as sildelink in the protocol) for transmitting data between a User Equipment (UE) and the UE can already support transmission of basic traffic based on road security. The method mainly aims to the service packets with the data packet size of 50-1200 bytes (bytes), and the transmission reliability of the required service packets within the specified coverage is more than 95%.

With the further development of the car networking technology, some new application scenarios appear, such as: vehicle formation, advanced driving, sensor information sharing, and remote control. Some of these applications require communication between UEs within a group, or unicast communication between two UEs. Therefore, the V2X system needs to consider unicast and multicast scenarios, however, no solution is currently available in the industry how to implement unicast communication between UEs.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method and a device for allocating unicast resources, which solve the problem of unicast communication between UEs.

According to a first aspect of the embodiments of the present invention, there is provided a unicast resource allocation method, applied to a first node, the method including: receiving information of a first unicast resource from a second node, the first unicast resource and corresponding transmission parameters being determined by the second node for the first node according to awareness information of the second node and service-related information of the first node; or, determining a second unicast resource of the first node, and determining a transmission parameter corresponding to the second unicast resource according to the related information fed back by the second node.

Optionally, before the receiving the information of the first unicast resource from the second node, the method further comprises: and sending the information related to the service of the first node to a second node.

Optionally, the determining, according to the related information fed back by the second node, a transmission parameter corresponding to the second unicast resource includes: transmitting a first reference signal to the second node; receiving Channel Quality Indication (CQI) information of the first reference signal from the second node; and determining a transmission parameter corresponding to a second unicast resource of the first node according to the CQI information.

Optionally, the sending the first reference signal to the second node includes: transmitting the first reference signal to the second node over a control channel.

Optionally, the second unicast resource of the first node and the position of the first reference signal have a corresponding mapping relationship.

Optionally, the determining, according to the related information fed back by the second node, a transmission parameter corresponding to the second unicast resource includes: sending the second unicast resource according to a preset Modulation and Coding Scheme (MSC), where the preset MCS is lower than a preset value, for example, the preset value is Quadrature Phase Shift Keying (QPSK) Modulation, and non-high-order Modulation; receiving first feedback information from the second node, wherein the first feedback information is used for indicating the signal-to-noise ratio (SNR) and/or the received power of the second node; and adjusting subsequent transmission parameters corresponding to the second unicast resource of the first node according to the first feedback information.

Optionally, the determining, according to the related information fed back by the second node, a transmission parameter corresponding to the second unicast resource includes: transmitting a scheduling assignment, SA, on the PSCCH to the second node; receiving transmission parameters from the second node, the transmission parameters selected by the second node for the first node according to the SA and information perceived by the second node.

Optionally, the method further comprises: and when the first node does not receive the transmission parameters, the transmission of the direct communication physical control channel (PSCCH) is carried out again.

Optionally, the determining, according to the related information fed back by the second node, a transmission parameter corresponding to the second unicast resource includes sending a second reference signal to the second node; receiving second feedback information for slow fading feedback from the second node; and adjusting the second unicast resource of the first node according to the second feedback information.

Optionally, the determining, according to the related information fed back by the second node, a transmission parameter corresponding to the second unicast resource includes: receiving third feedback information fed back for same frequency, different frequency or background noise from the second node; and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

Optionally, the third feedback information is used to represent a channel interference condition of the second node, or the third feedback information is used to represent a received signal strength indication of the second node.

According to a second aspect of the embodiments of the present invention, there is provided a unicast resource allocation method, applied to a second node, the method including: receiving, from a first node, traffic-related information of the first node; determining a first unicast resource and a corresponding transmission parameter of the first node according to the perception information of the second node and the service-related information of the first node; and sending information of the first unicast resource to the first node; or feeding back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the method further comprises: receiving a reception situation of control information of a first node from the first node; selecting transmission parameters for the first node according to the information sensed by the second node and the receiving condition; transmitting the transmission parameters to the first node.

Optionally, receiving a first reference signal from the first node; transmitting Channel Quality Indication (CQI) information of the first reference signal to the first node.

Optionally, the feeding back the relevant information to the first node includes: sending first feedback information to the first node, wherein the first feedback information is used for indicating at least one of the following: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Optionally, the feeding back the relevant information to the first node includes: receiving a scheduling assignment, SA, from the first node; determining transmission parameters for the first selection according to the SA and the information sensed by the second node; transmitting the transmission parameters to the first node.

Optionally, feeding back relevant information to the first node, including: receiving a second reference signal from the first node; and sending second feedback information of the slow attenuation feedback to the first node.

Optionally, feeding back relevant information to the first node, including: and sending third feedback information for same frequency, different frequency or background noise feedback to the first node.

According to a third aspect of embodiments of the present invention, there is provided a first node, including: a first transceiver and a first processor, wherein the first transceiver is configured to receive information of a first unicast resource from a second node, and the first unicast resource and corresponding transmission parameters are determined by the second node for the first node according to awareness information of the second node and traffic-related information of the first node; the first processor is configured to determine a second unicast resource of the first node, and determine a transmission parameter corresponding to the second unicast resource according to the related information fed back by the second node.

Optionally, the first transceiver is further configured to send information related to a service of the first node to a second node.

Optionally, the first transceiver is further configured to transmit a first reference signal to the second node; the first transceiver is further configured to receive Channel Quality Indication (CQI) information of the first reference signal from the second node; the first processor is further configured to determine a transmission parameter corresponding to a second unicast resource of the first node according to the CQI information.

Optionally, the first transceiver is further configured to transmit the first reference signal to the second node through a control channel.

Optionally, the first transceiver is further configured to transmit the second unicast resource according to a preset MSC, where the preset MCS is lower than a preset value, for example, the preset value is QPSK modulation, and is not high-order modulation; receiving first feedback information from the second node, wherein the first feedback information is used to indicate at least one of: a positive acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, a received power of the second node; the first processor is further configured to adjust subsequent transmission parameters corresponding to a second unicast resource of the first node according to the first feedback information.

Optionally, the first transceiver is further configured to send, to the second node, a scheduling assignment SA on a Physical Sidelink Control Channel (PSCCH), where the SA does not include an MCS transmission parameter of a corresponding resource, and only includes a location parameter; the first transceiver is further configured to receive transmission parameters from the second node, the transmission parameters selected by the second node for the first node according to the SA and information perceived by the second node.

Optionally, the first transceiver is further configured to, when the first node does not receive the transmission parameter, resume transmission of the direct communication physical control channel PSCCH.

Optionally, the first transceiver is further configured to transmit a second reference signal to the second node; the first transceiver is further configured to receive second feedback information from the second node; the first processor is further configured to adjust a second unicast resource of the first node according to the second feedback information.

Optionally, the first transceiver is further configured to receive, from the second node, third feedback information for co-frequency, inter-frequency, or background noise feedback; the first processor is further configured to adjust subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

According to a fourth aspect of the embodiments of the present invention, there is provided a second node, including: a second transceiver and a second processor, wherein the second transceiver is configured to receive information related to a service of a first node from the first node; the second processor is configured to determine a first unicast resource and a corresponding transmission parameter of the first node according to the sensing information of the second node and the service-related information of the first node; the second transceiver is further configured to send information of the first unicast resource to the first node; the second transceiver is further configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the second transceiver is further configured to receive, from a first node, a reception condition of control information of the first node; the second processor is further configured to select a transmission parameter for the first node according to the information perceived by the second node and the reception condition; the second transceiver is further configured to send the transmission parameters to the first node.

Optionally, the second transceiver is further configured to receive a first reference signal from the first node; the second transceiver is further configured to send channel quality indication, CQI, information of the first reference signal to the first node.

Optionally, the second transceiver is further configured to send first feedback information to the first node, where the first feedback information is used to indicate at least one of: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Optionally, the second transceiver is further configured to receive a scheduling assignment SA from the first node; the second processor is further configured to determine a transmission parameter for the first selection according to the SA and information sensed by the second node; the second transceiver is further configured to send the transmission parameters to the first node.

Optionally, the second transceiver is further configured to receive a second reference signal from the first node; the second transceiver is further configured to send second feedback information of the slow fading feedback to the first node.

Optionally, the second transceiver is further configured to send third feedback information for co-frequency, inter-frequency, or background noise feedback to the first node.

According to a fifth aspect of the embodiments of the present invention, there is provided a first node, including:

a first receiving module, configured to receive information of a first unicast resource from a second node, where the first unicast resource and corresponding transmission parameters are determined by the second node for the first node according to sensing information of the second node and service-related information of the first node;

a first determining module, configured to determine a second unicast resource of the first node, and determine a transmission parameter corresponding to the second unicast resource according to the relevant information fed back by the second node.

Optionally, the first node further comprises: and the second sending module is used for sending the information related to the service of the first node to a second node.

Optionally, the second sending module is further configured to send a first reference signal to the second node; receiving Channel Quality Indication (CQI) information of the first reference signal from the second node; the first node further comprises: and the adjusting module is used for determining subsequent transmission parameters corresponding to the second unicast resource of the first node according to the CQI information.

Optionally, the second sending module is further configured to send the first reference signal to the second node through a control channel.

Optionally, the first receiving module is further configured to send the second unicast resource according to a preset MSC, where the preset MCS is lower than a preset value, for example, the preset value is Quadrature Phase Shift Keying (QPSK) modulation, and non-high order modulation; receiving first feedback information from the second node, wherein the first feedback information is used for indicating the signal-to-noise ratio (SNR) and/or the received power of the second node; and adjusting subsequent transmission parameters corresponding to the second unicast resource of the first node according to the first feedback information.

Optionally, the second sending module is further configured to send a scheduling assignment SA to the second node on the PSCCH, where the SA does not include an MCS transmission parameter of the corresponding resource, and only includes a location parameter; the first receiving module is further configured to receive a transmission parameter from the second node, where the transmission parameter is selected by the second node for the first node according to the SA and information perceived by the second node.

Optionally, the second sending module is further configured to, when the first node does not receive the transmission parameter, send the PSCCH again.

Optionally, the second sending module is further configured to send a second reference signal to the second node; the first receiving module is further configured to receive second feedback information of slow fading feedback from the second node; the adjusting module is further configured to adjust a second unicast resource of the first node according to the second feedback information.

Optionally, the first receiving module is further configured to receive, from the second node, third feedback information for co-frequency, inter-frequency, or background noise feedback; the adjusting module is further configured to adjust subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

According to a sixth aspect of the embodiments of the present invention, there is provided a second node, including:

a second receiving module, configured to receive, from a first node, information related to a service of the first node;

a second determining module, configured to determine a first unicast resource and a corresponding transmission parameter of the first node according to the sensing information of the second node and the service-related information of the first node;

a first sending module, configured to send information of the first unicast resource to the first node;

a feedback module, configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the feedback module is further configured to receive, from a first node, a reception condition of control information of the first node; selecting transmission parameters for the first node according to the information sensed by the second node and the receiving condition; transmitting the transmission parameters to the first node.

Optionally, the feedback module is further configured to receive a first reference signal from the first node; transmitting Channel Quality Indication (CQI) information of the first reference signal to the first node.

Optionally, the feedback module is further configured to send first feedback information to the first node, where the first feedback information is used to indicate at least one of: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Optionally, the feedback module is further configured to receive a scheduling assignment SA from the first node; determining transmission parameters for the first selection according to the SA and the information sensed by the second node; transmitting the transmission parameters to the first node.

Optionally, the feedback module is further configured to receive a second reference signal from the first node; and sending second feedback information of the slow attenuation feedback to the first node.

Optionally, the feedback module is further configured to send third feedback information for co-frequency, inter-frequency, or background noise feedback to the first node.

According to an eighth aspect of embodiments of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the unicast resource allocation method according to the first aspect; alternatively, the steps of the unicast resource allocation method according to the second aspect are implemented.

In the embodiment of the invention, the first node receives the information of the first unicast resource from the second node, or the first node determines the second unicast resource of the first node and adjusts the subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node, thereby realizing the unicast communication between the UE.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of the temporal relationship between the sensing window and the selection window;

fig. 2 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention;

fig. 3a is a flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 3b is a second flowchart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 4a is a third schematic flowchart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 4b is a fourth flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 5a is a fifth flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 5b is a sixth schematic flowchart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 6a is a seventh flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 6b is an eighth schematic flowchart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 7a is a ninth flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 7b is a tenth of a flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 8a is an eleventh flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 8b is a twelfth schematic flowchart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 8c is a thirteen schematic flow chart of a unicast resource allocation method according to an embodiment of the present invention;

fig. 8d is a fourteenth flowchart illustrating a unicast resource allocation method according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first node according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second node according to an embodiment of the present invention;

fig. 11 is a second schematic structural diagram of a first node according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of the first node according to the embodiment of the present invention;

fig. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The sensing process of version 14(R14) is described first below:

in Mode (Mode)4, the basic mechanism of resource allocation is Sensing + Semi-Persistent Scheduling (SPS).

The basic idea is that the node knows the resource occupation situation of other nodes and the subsequent resource occupation situation in real time through real-time sending, when the node has the resource selection or reselection requirement, selects proper idle resources to send according to the known resource occupation situation, and once the idle resources are continuously occupied under certain conditions after the selection, the resources are not changed unless the triggering condition of the resource reselection is met.

Two windows are mainly involved in the resource selection process: a sending window and a selection window, the time relationship between the two windows is shown in fig. 1.

Step 1: setting all candidate resources in the resource selection window as available;

step 2: and (3) resource exclusion process: obtaining an available resource set;

here, the resources in the selection window are selected, but the information obtained at present only includes information in the sending window, that is, the occupation situation of the resources in the selection window needs to be inferred according to the obtained information in the sending window, and the resources in the selection window are further screened.

Due to differences in the service period (SPS period), the service origination point, and the SPS resource duration (SPS count) value). The number of Scheduling Assignments (SAs) and the interval of other nodes received by the node within the sending window may all be different. It is understood that the number of SAs refers to a number corresponding to one Transport Block (TB), including an initial SA and a retransmission SA.

Step 2-1: determining a valid latest SA;

wherein, the information of other nodes learned in the sending window is valid only by the latest SA which reserves the resource belonging to the selection window and behind the selection window in time.

Step 2-2: excluding candidate subframes corresponding to skip subframes;

step 2-3: determining whether a resource within the selection window needs to be excluded, and candidate resources satisfying the following 2 conditions need to be excluded:

(1) the SA indicates the next resource reservation and collides with the TB sent by the candidate resource or the TB sent by the subsequent resource corresponding to the candidate resource;

(2) a Physical Sidelink shared Channel (psch) -Reference Signal Received Power (RSRP) measurement is performed according to the decoded SA, and the measurement is above the RSRP threshold.

Candidate resources satisfying the two conditions need to be excluded from the resource selection window;

step 2-4: determining the proportion (duty ratio) of the remaining selectable resources within the selection window:

step 2-5: when the proportion of the current remaining optional resources is more than or equal to 20 percent, ending the resource excluding process; when the proportion of the current remaining optional resources is less than 20%, the power threshold value of the current transceiver node is increased (3dB, the initial value is the system configuration during each resource selection, and the subsequent iteration is updated all the time), the resource reuse range is reduced, and the resources are deducted again.

And step 3: selecting an initial selection process (more than 20 resources, and selecting the lowest (lowest) 20% of the resources);

and for the residual resources which are not excluded from the resources in the selection window, performing power averaging, sequencing, and screening 20% of the resources with lower smooth power.

The initial retransmission resource selection process when the transmission times is 2: because each SA indicates a location indication of 2 times data (data) resources, i.e., data resources require simultaneous selection of an initial transmission resource and a retransmission resource. And 2 resources are selected from the 20% resources with the lowest power, and the interval of the two resources is ensured to be within [ -15,15] subframes and cannot be 0. The specific selection algorithm is left to the implementation.

The channel condition information perceived by each user is different. When the existing broadcasting mechanism node selects resources, certain resource selection is carried out based on information obtained by measuring Sensing, and because the resource selection is broadcast, the resource selection only needs to be carried out from the perspective of self perception; however, for unicast, there is a certain channel reciprocity for size-scale fading, but there may be a large difference for co-channel interference, so in order to perform more accurate scheduling, each node needs to consider from the perspective of the receiving node when selecting resources. The resource that may be selected, if still considered from its own perspective, is a resource with strong interference to the receiving node, affecting system performance.

In the implementation of the present invention, from the channel point of view, the transmitting end needs to experience fading and various interferences to the receiving end.

Among them, fading includes: slow fading (path loss and shadow fading); and fast decay (small scale);

wherein the interference comprises: co-frequency interference, inter-frequency Interference (IBE), and background noise;

for fast fading, two parameters are mainly seen: coherence time and coherence bandwidth. For coherence time, relative vehicle speed and carrier frequency are correlated. Correlation in time. If the image is relatively static, the correlation exists all the time, and the correlation time is infinite.

For fast fading, two parameters are mainly seen: coherence time and coherence bandwidth. For coherent bandwidth, the delay spread is correlated to channel modeling. Correlation in the frequency domain.

For path loss, it depends mainly on the relative distance variation and the carrier frequency. Can be regarded as the correlation of time-frequency resources.

For shadow fading, the coherence time is mainly considered, as well as the variation of the relative distance between pairs of nodes and the scene (affecting the correlation distance). Can be regarded as the correlation of time-frequency resources.

For co-channel interference, the co-channel interference of each Physical Resource Block (PRB) varies, the time correlation does not exist, the frequency domain depends on a Scheduling mechanism, if Semi-Persistent Scheduling (SPS) is used, the co-channel interference frequency domain correlation is stronger, and the probability of Resource existence is higher; the degree of change in the period and topology of the traffic is relevant; there is no temporal correlation for a certain frequency domain resource if for Dynamic Scheduling (DS).

For inter-frequency interference, that is, IBE, changes are mainly related to topology changes and scheduling methods.

The background noise is not changed as long as the occupied resource bandwidth is related.

It can be seen here that there is no correlation on any PRB, including both time and frequency, i.e. for the V2X scenario, and that frequency and time selective gains cannot be exploited very perfectly if various fading and interference are considered. That is, it is difficult to obtain frequency domain or time selective gain if some feedback of channel quality is desired in advance.

From another perspective, the specific resource selection and the determination of the transmission parameters, which are different from each other in perception, need some cooperation of the transceiving nodes.

A. The two nodes establish connection, and from the resource allocation perspective, there are several implementation manners as follows:

(1) the node A allocates resources for the node A and the node B or the node B allocates resources for the node A and the node B for links of the node B-A and the node B;

(2) the node A selects resources for the node A to be used for the link of the node A-B; the node B selects resources for itself for the link of B-a, where selecting resources includes selecting resources and determining specific transmission parameters.

(3) The node A selects resources for the node A to be used for the link of the node A-B; the node B selects resources for itself for the link of the node B-a, where the resource selection is only resource selection, and the determination of the specific transmission parameter may be determined by node feedback, or only an initial lower transmission parameter (Modulation and Coding Scheme (MCS) level is lower, etc.) is determined, and the node performs corresponding feedback according to the reception characteristic.

(4) The node a selects resources for the node B for the link of the B-a, and the node B selects resources for the node a for the link of the a-B.

It should be noted that, the condition that the master node allocates resources is not considered temporarily, and only the resource selected by the node a for itself or for the other party is considered;

according to the previous analysis, the link performance of the B-A and the specific interference condition can be correctly sensed only by the node A, and the complete link reciprocity is not available. The link performance of a-B is the same.

However, any feedback presents the following problems: 1) with a certain delay in time, the channel condition may change within the corresponding time: 2) signaling overhead and probability of signaling reception failure. 3) The correspondent nodes do not know each other's traffic related information, i.e., transmission opportunities.

Referring to fig. 2, an architecture of a wireless communication system according to an embodiment of the present invention is provided. As shown in fig. 2, the wireless communication system may include: a first node 20 and a second node 21, the first node 20 being able to communicate with the second node 21. In practical applications, the connections between the above devices may be wireless connections, and fig. 2 is illustrated with solid lines for convenience and intuition of the connection relationships between the devices.

The first node 20 and the second node 21 provided in the embodiment of the present invention may be a Mobile phone, a tablet Computer, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device.

Referring to fig. 3a, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a first node, and the method specifically includes the following steps, where the method may start from step 311, or may start from step 312:

step 311: receiving information of a first unicast resource from a second node;

in an embodiment of the present invention, before receiving the information of the first unicast resource from the second node, the first node sends the information related to the service of the first node to the second node.

The first unicast resource and the corresponding transmission parameter are determined by the second node for the first node according to the perception information of the second node and the service-related information of the first node.

Step 312: determining a second unicast resource of the first node, and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node;

referring to fig. 3b, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a second node, and the method specifically includes the following steps, where the method may start from step 321, and may also start from step 324:

step 321: receiving information related to the service of the first node from the first node, and then performing step 322;

step 322: determining a first unicast resource and a corresponding transmission parameter of the first node according to the perception information of the second node and the service-related information of the first node, and then executing step 323;

step 323: sending information of the first unicast resource to the first node;

step 324: feeding back related information to the first node;

in an embodiment of the present invention, the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

In the embodiment of the invention, a first node receives information of a first unicast resource from a second node, wherein the first unicast resource and corresponding transmission parameters are determined by the second node according to perception information of the second node and service-related information of the first node; or the first node determines the second unicast resource of the first node, and adjusts subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node, thereby realizing unicast communication between the UE.

Referring to fig. 4a, for step 311 in fig. 3a, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 411: sending information related to the service of the first node to the second node;

when the second node allocates resources and corresponding transmission parameters to the first node, the following factors need to be considered: the service related information of the first node, the perception information of the second node, and further, the condition of receiving the service related control information of the first node can be considered.

Step 412: information of a first unicast resource is received from a second node.

Referring to fig. 4b, for steps 321 to 323 in fig. 3b, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a second node, and the specific steps are as follows:

step 421: receiving, from a first node, traffic-related information of the first node;

step 422: determining a first unicast resource of a first node according to the perception information of a second node and the service-related information of the first node;

step 423: sending information of the first unicast resource to the first node;

step 424: receiving a reception situation of control information of a first node from the first node;

step 425: selecting transmission parameters for the first node according to the information sensed by the second node and the receiving condition;

step 426: the transmission parameters are sent to the first node.

The following description is made in conjunction with specific examples, in which a first node is referred to as an a node and a second node is referred to as a B node.

Example 1: in Semi-Persistent Scheduling (SPS) situations, the a and B nodes select resources for each other.

The node A informs the node B of the information related to the service through a control signaling, and the node B selects resources for the node A according to the information of self perception (sensing) and the information of the service related to the node A, wherein the resources comprise transmission parameters such as Modulation and Coding Scheme (MCS) and the like, and informs the node A. For the a node, when the service information is changed, it needs to tell the B node. When the receiving condition of the node B on the corresponding resource changes greatly, such as becomes worse, the resource needs to be adjusted and the node a is informed.

Since the resources are selected for each other, i.e. the transmission resources of each other are known to each other, there is no problem of half-duplex between unicast nodes.

Further, when the node B selects the transmission parameters for the node a, the node a may be referred to for receiving the control information in addition to considering the relevant sending information.

For DS, i.e. if the traffic does not have stability, the control overhead is too large, and this method is not suitable.

In the embodiment of the invention, the first node and the second node select resources for each other, thereby realizing unicast communication between the UE.

Referring to fig. 5a, for step 312 in fig. 3, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 511: determining a second unicast resource of the first node;

step 512: transmitting a first reference signal to a second node;

in the embodiment of the invention, the first reference signal is sent to the second node through the control channel, and the second unicast resource of the first node and the position of the first reference signal have a corresponding mapping relation.

Step 513: receiving CQI information for a first reference signal from a second node;

step 514: and determining the transmission parameters corresponding to the second unicast resources of the first node according to the CQI information.

Referring to fig. 5b, for step 324 in fig. 3b, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a second node, and the specific steps are as follows:

step 521: receiving a first reference signal from a first node;

in the embodiment of the present invention, the second unicast resource of the first node and the position of the first reference signal have a corresponding mapping relationship.

It should be noted that, in terms of time, the reference signal is m milliseconds ahead of the second unicast resource, and m should be within the scope of channel correlation.

Step 522: transmitting CQI information of a first reference signal to a first node.

Example 2: a direct Physical Channel (PSCCH)/PSCCH Frequency Division Multiplexing (FDM) mode, in which an a node only selects resource information and a B node assists in selecting corresponding transmission parameters.

The relationship of the resource reference signal and the selected SPS resource in the system is corresponding. E.g., m milliseconds ahead, where m takes correlation into account.

After the node A selects the resources, the node A does not send the SA, but sends the reference information through the control information, the node B immediately makes CQI feedback after receiving the reference signal, and then the node A makes the decision of the MCS of the resources according to the CQI information.

If the channel condition is poor, the node A can also make a resource selection again.

Because of the time comparison end, the variation of slow attenuation can be ignored; since the SPS resources and the location of the RS signal are corresponding, i.e., the CQI may reflect various types of interference.

A similar approach can be used for DS, where the resource and reference signal positions are corresponding, but signaling overhead is larger for DS.

In the embodiment of the invention, under the PSCCH/PSSCH FDM mode and the SPS/DS mode, the first node only selects the resource information, and the second node assists in selecting the corresponding transmission parameters, thereby realizing the unicast communication between the UE.

Referring to fig. 6a, for step 312 in fig. 3, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 611: receiving first feedback information from a second node;

in an embodiment of the present invention, the first feedback information is used to indicate at least one of: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Step 612: and adjusting subsequent transmission parameters corresponding to the second unicast resource of the first node according to the first feedback information.

Referring to fig. 6b, for step 324 in fig. 3b, an embodiment of the present invention provides a unicast resource allocation method, where an execution subject of the method is a second node, and the specific steps are as follows:

step 621: sending first feedback information to a first node;

Example 3: in a PSCCH/PSCCH (Frequency-division multiplexing, FDM) mode, in a DS mode, a node a selects resources for itself, a node B feeds back corresponding information, and assists the node a in adjusting transmission parameters.

After the node a selects resources for itself, it sends them according to a lower MCS, the node B needs to make corresponding feedback to SNR and received power except under the condition of Acknowledgement/Non-Acknowledgement (ACK/NACK), and after the node a receives corresponding information, it makes corresponding resource adjustment to the next resource sending.

The adjustment here is only a coarse adjustment, taking into account that the interference information is changing.

In the embodiment of the invention, in a PSCCH/PSSCH FDM mode and a DS mode, a first node selects resources for the first node, a second node feeds back corresponding information and assists the first node to adjust sending parameters, and unicast communication between UE is realized.

Referring to fig. 7a, for step 312 in fig. 3a, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 711: determining a second unicast resource of the first node;

step 712: sending the SA to the second node;

step 713: receiving transmission parameters from the second node;

in the embodiment of the invention, the transmission parameters are selected for the first node by the second node according to the SA and the information sensed by the second node.

It should be noted that, when the first node does not receive the transmission parameters, the transmission of the direct communication physical control channel PSCCH is resumed.

Referring to fig. 7b, for step 324 in fig. 3b, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a second node, and the specific steps are as follows:

step 721: receiving an SA from a first node;

step 722: selecting and determining transmission parameters for the first node according to the SA and the information sensed by the second node;

step 723: the transmission parameters are sent to the first node.

Example 4: in PSCCH/PSSCH TDM mode, in SPS mode, node A only selects resource information, and node B assists selection of corresponding transmission parameters.

After the node A selects resources, SA is sent through control information, after the node B receives the resources, corresponding transmission parameters are selected for the node B according to the received node information and sending information to enable the node A to select the transmission parameters, the node A sends the resources according to the fed-back transmission parameters, and the node B performs decoding processing on the resources according to the corresponding transmission parameters.

The node B can acquire some slow-decay information from the node A information reception; the effects of slow fading can be considered similar if the PSCCH/PSCCH is within a certain time range. In the SPS mode, the influence of PSSCH co-channel interference is similar. If the node A does not receive the feedback of the node B, the transmission is considered to be failed, and the PSCCH needs to be transmitted again.

In the embodiment of the invention, the node A only selects resource information in a PSCCH/PSSCH TDM mode and in an SPS mode, and the node B assists in selecting corresponding transmission parameters, thereby realizing unicast communication between UE.

Referring to fig. 8a, for step 312 in fig. 3a, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 811: determining a second unicast resource of the first node;

step 812: transmitting a second reference signal to a second node;

step 813: receiving second feedback information for feedback on slow fading from the second node;

step 814: and adjusting the second unicast resource of the first node according to the second feedback information.

Referring to fig. 8b, for step 324 in fig. 3b, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a second node, and the specific steps are as follows:

step 821: receiving a second reference signal from the first node;

step 822: and sending second feedback information of the slow attenuation feedback to the first node.

For slow fading, the first node sends the second reference signal m milliseconds before sending the service, and the second node performs rapid feedback after receiving the second reference signal.

Referring to fig. 8c, for step 312 in fig. 3a, an embodiment of the present invention provides another unicast resource allocation method, where an execution subject of the method is a first node, and the specific steps are as follows:

step 831: receiving third feedback information fed back for same frequency, different frequency or bottom noise from the second node;

in this embodiment of the present invention, the third feedback information is used to indicate a channel interference condition of the second node, or the third feedback information is used to indicate a received signal strength indication of the second node.

Step 832: and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

Referring to fig. 8d, in step 324 in fig. 3b, another unicast resource allocation method is provided in the embodiment of the present invention, where an execution subject of the method is a second node, and the specific steps are as follows:

step 841: and sending third feedback information for same frequency, different frequency or background noise feedback to the first node.

In the embodiment of the present invention, the second feedback information is used to indicate a channel interference condition, or the second feedback information is used to indicate a condition that the second node receives a reference signal sent by the first node, where the reference signal is sent before the first node sends a service.

Example 5: in the SPS mode, the node a selects resources, and the node B assists in the selection of corresponding resources and transmission parameters.

The node B always performs the sending process, the feedback of the node B to the channel is divided into 2 parts, one part is the feedback to the same frequency interference, and the other part is the characterization of slow fading.

For the feedback of the same frequency/different frequency/bottom noise feedback, the interference condition on some channels is fed back through a feedback control channel, or the feedback is directly made for some channels with less interference according to the Received Signal Strength Indication (RSSI) information of the feedback control channel, similar to CQI feedback, and the corresponding RSSI information is directly fed back.

For slow fading, the RS reference signal is transmitted m milliseconds before transmitting the traffic, knowing the transmission characteristics of the opposite traffic. Under the condition of not knowing the service transmission characteristics of the opposite side, the node A is required to transmit an RS signal before the service is transmitted, and the receiving node B is required to perform rapid feedback.

And the node A selects proper resources and an MCS mechanism by combining the sending feedback information according to the acquired slow attenuation condition. Specifically, the CQI feedback information of each Physical Resource Block (PRB)/PRB set is obtained according to the RS information, and several better PRB/PRB sets are selected and then combined with the RSSI information to select corresponding resources and MCSs.

In the embodiment of the invention, under the SPS mode, the node A selects resources, and the node B assists in corresponding resource selection and transmission parameter selection, so that the unicast communication between the UE is realized.

Referring to fig. 9, an embodiment of the present invention provides a first node 900, including: a first transceiver 901 and a first processor 902;

wherein the first transceiver 901 is configured to receive information of a first unicast resource from a second node, where the first unicast resource and corresponding transmission parameters are determined by the second node for the first node according to the awareness information of the second node and the service-related information of the first node;

the first processor 902 is configured to determine a second unicast resource of the first node, and adjust a subsequent transmission parameter corresponding to the second unicast resource according to the related information fed back by the second node.

Optionally, the first transceiver 901 is further configured to send information related to the service of the first node to a second node.

Optionally, the first transceiver 901 is further configured to transmit a first reference signal to the second node;

the first transceiver 901 is further configured to receive Channel Quality Indication (CQI) information of the first reference signal from the second node;

the first processor 902 is further configured to determine, according to the CQI information, a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the first transceiver 901 is further configured to send the first reference signal to the second node through a control channel.

Optionally, the first transceiver 901 is further configured to transmit the second unicast resource according to a preset MSC, where the preset MCS is lower than a preset value, for example, the preset value is QPSK modulation, and is not high-order modulation; receiving first feedback information from the second node, wherein the first feedback information is used to indicate at least one of: a positive acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, a received power of the second node;

the first processor 902 is further configured to adjust subsequent transmission parameters corresponding to a second unicast resource of the first node according to the first feedback information.

Optionally, the first transceiver 901 is further configured to send a scheduling assignment SA to the second node on the PSCCH, where the SA does not include MCS transmission parameters of corresponding resources, and only includes location parameters;

the first transceiver 901 is further configured to receive transmission parameters from the second node, where the transmission parameters are selected by the second node for the first node according to the SA and information perceived by the second node.

Optionally, the first transceiver 901 is further configured to, when the first node does not receive the transmission parameter, resume transmission of the direct communication physical control channel PSCCH.

Optionally, the first transceiver 901 is further configured to transmit a second reference signal to the second node;

the first transceiver 901 is further configured to receive second feedback information from the second node;

the first processor 902 is further configured to adjust a second unicast resource of the first node according to the second feedback information.

Optionally, the first transceiver 901 is further configured to receive third feedback information for co-frequency, inter-frequency, or background noise feedback from the second node;

the first processor 902 is further configured to adjust subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

Referring to fig. 10, an embodiment of the present invention provides a second node 1000, including: a second transceiver 1001 and a second processor 902;

wherein the second transceiver 1001 is configured to receive, from a first node, information related to a service of the first node;

the second processor 1002 is configured to determine a first unicast resource and a corresponding transmission parameter of the first node according to the sensing information of the second node and the service-related information of the first node;

the second transceiver 1001 is further configured to send information of the first unicast resource to the first node;

the second transceiver 1001 is further configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the second transceiver 1001 is further configured to receive, from a first node, a reception condition of control information of the first node;

the second processor 1002 is further configured to select a transmission parameter for the first node according to the information perceived by the second node and the receiving condition;

the second transceiver 1001 is further configured to send the transmission parameter to the first node.

Optionally, the second transceiver 1001 is further configured to receive a first reference signal from the first node;

the second transceiver 1001 is further configured to send channel quality indication, CQI, information of the first reference signal to the first node.

Optionally, the second transceiver 1001 is further configured to send first feedback information to the first node, where the first feedback information is used to indicate at least one of: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Optionally, the second transceiver 1001 is further configured to receive a scheduling assignment SA from the first node; the second processor is further configured to determine a transmission parameter for the first selection according to the SA and information sensed by the second node;

Optionally, the second transceiver 1001 is further configured to receive a second reference signal from the first node;

the second transceiver 1001 is further configured to send second feedback information of the slow fading feedback to the first node. For slow fading, the first node sends the second reference signal m milliseconds before sending the service, and the second node performs rapid feedback after receiving the second reference signal.

Optionally, the second transceiver 1001 is further configured to send third feedback information for co-frequency, inter-frequency, or background noise feedback to the first node.

Referring to fig. 11, an embodiment of the present invention provides a first node 1100, including:

a first receiving module 1101, configured to receive information of a first unicast resource from a second node, where the first unicast resource and corresponding transmission parameters are determined by the second node for the first node according to perception information of the second node and service-related information of the first node;

a first determining module 1102, configured to determine a second unicast resource of the first node, and determine a transmission parameter corresponding to the second unicast resource according to the related information fed back by the second node.

Optionally, the first node 1100 further includes: a second sending module 1103, configured to send, to a second node, information related to the service of the first node.

Optionally, the second sending module 1103 is further configured to send a first reference signal to the second node; receiving Channel Quality Indication (CQI) information of the first reference signal from the second node;

the first node further comprises: an adjusting module 1104, configured to determine, according to the CQI information, a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the second sending module 1103 is further configured to send the first reference signal to the second node through a control channel.

Optionally, the first receiving module 1101 is further configured to send the second unicast resource according to a preset MSC, where the preset MCS is lower than a preset value, for example, the preset value is QPSK modulation, and is not high-order modulation; receiving first feedback information from the second node, wherein the first feedback information is used for indicating the signal-to-noise ratio (SNR) and/or the received power of the second node;

the adjusting module 1104 is further configured to adjust subsequent transmission parameters corresponding to the second unicast resource of the first node according to the first feedback information.

Optionally, the second sending module 1103 is further configured to send the scheduling assignment SA on the PSCCH to the second node; the SA does not include the MCS transmission parameters of the corresponding resources, but only includes the location parameters

The first receiving module 1101 is further configured to receive a transmission parameter from the second node, where the transmission parameter is selected by the second node for the first node according to the SA and information perceived by the second node.

Optionally, the second sending module 1103 is further configured to send a second reference signal to the second node;

the first receiving module 1101 is further configured to receive second feedback information of slow fading feedback from the second node; for slow fading, the first node sends the second reference signal m milliseconds before sending the service, and the second node performs rapid feedback after receiving the second reference signal.

The adjusting module 1104 is further configured to adjust a second unicast resource of the first node according to the second feedback information.

Optionally, the first receiving module 1101 is further configured to receive third feedback information fed back by the same frequency, different frequency, or bottom noise from the second node;

the adjusting module 1104 is further configured to adjust subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

Referring to fig. 12, an embodiment of the present invention provides a second node 1200, including:

a second receiving module 1201, configured to receive, from a first node, information related to a service of the first node;

a second determining module 1202, configured to determine, according to the sensing information of the second node and the service-related information of the first node, a first unicast resource and a corresponding transmission parameter of the first node; the first sending module is used for sending the information of the first unicast resource to the first node;

a feedback module 1203, configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node.

Optionally, the feedback module 1203 is further configured to receive, from a first node, a receiving condition of control information of the first node; selecting transmission parameters for the first node according to the information sensed by the second node and the receiving condition; the first sending module is further configured to send the transmission parameter to the first node.

Optionally, the feedback module 1203 is further configured to receive a first reference signal from the first node; transmitting Channel Quality Indication (CQI) information of the first reference signal to the first node.

Optionally, the feedback module 1203 is further configured to send first feedback information to the first node, where the first feedback information is used to indicate at least one of: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

Optionally, the feedback module 1203 is further configured to receive a scheduling assignment SA from the first node; determining transmission parameters for the first selection according to the SA and the information sensed by the second node; transmitting the transmission parameters to the first node.

Optionally, the feedback module 1203 is further configured to receive a second reference signal from the first node; and sending second feedback information for slow attenuation feedback to the first node, wherein for slow attenuation, the first node sends the second reference signal m milliseconds before sending the service, and the second node carries out rapid feedback after receiving the second reference signal.

Optionally, the feedback module 1203 is further configured to send third feedback information for co-frequency, inter-frequency, or background noise feedback to the first node.

Referring to fig. 13, another user equipment 1300 according to an embodiment of the present invention includes: at least one processor 1301, memory 1302, user interface 1303, and at least one network interface 1304. The various components in the user device 1300 are coupled together by a bus system 1305.

It will be appreciated that the bus system 1305 is used to implement connective communication between these components. The bus system 1305 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in FIG. 13 as the bus system 1305.

The user interface 1303 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen).

It is to be understood that the memory 1302 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (Erasable PROM,

EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), or flash memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic random access memory (Double Data Rate SDRAM,

DDRSDRAM), Enhanced synchronous dynamic random access memory (Enhanced SDRAM,

ESDRAM), Synchronous Link Dynamic Random Access Memory (SLDRAM), and Direct memory bus random access memory (DRRAM). The memory 1302 described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1302 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 13021 and application programs 13022.

The operating system 13021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs 13022, including various application programs such as a media player, a browser, and the like, are used to implement various application services. A program for implementing the method of an embodiment of the present invention may be included in the application 13022.

In this embodiment of the present invention, the user equipment 1300 may further include: a computer program stored on the memory 1302 and executable on the processor 1301, which when executed by the processor 1301, performs the steps of the method provided by embodiments of the present invention.

The method disclosed by the above embodiment of the present invention may be applied to the processor 1301, or implemented by the processor 1301. Processor 1301 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1301. The Processor 1301 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 1302, and the processor 1301 reads the information in the memory 1302, and combines the hardware to complete the steps of the method. Specifically, the computer-readable storage medium has stored thereon a computer program.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

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

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

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

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A unicast resource allocation method applied to a first node is characterized by comprising the following steps:

receiving information of a first unicast resource from a second node, the first unicast resource and corresponding transmission parameters being determined by the second node for the first node according to awareness information of the second node and service-related information of the first node; or,

determining a second unicast resource of the first node, and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node;

the determining, according to the related information fed back by the second node, the transmission parameter corresponding to the second unicast resource includes:

sending a scheduling assignment SA to the second node on a physical sidelink control channel PSCCH;

receiving transmission parameters from the second node, the transmission parameters selected by the second node for the first node according to the SA and information perceived by the second node.

2. The method of claim 1, wherein prior to the receiving information of the first unicast resource from the second node, the method further comprises:

and sending the information related to the service of the first node to a second node.

3. The method of claim 1, wherein the determining the transmission parameter corresponding to the second unicast resource according to the information fed back by the second node comprises:

transmitting a first reference signal to the second node;

receiving Channel Quality Indication (CQI) information of the first reference signal from the second node;

and determining a transmission parameter corresponding to a second unicast resource of the first node according to the CQI information.

4. The method of claim 3, wherein the sending the first reference signal to the second node comprises:

transmitting the first reference signal to the second node over a control channel.

5. The method of claim 3, wherein the second unicast resource of the first node and the position of the first reference signal have a corresponding mapping relationship.

6. The method of claim 1, wherein the adjusting, at the node, the subsequent transmission parameters corresponding to the second unicast resource according to the related information fed back by the second node comprises:

sending a second unicast resource according to a preset modulation and coding strategy MSC, wherein the preset MCS is lower than a preset value;

receiving first feedback information from the second node, wherein the first feedback information is used to indicate at least one of: a positive acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, a received power of the second node;

and adjusting subsequent transmission parameters corresponding to the second unicast resource of the first node according to the first feedback information.

7. The method of claim 1, further comprising:

and when the first node does not receive the transmission parameters, the first node retransmits the physical side link control channel PSCCH.

8. The method of claim 1, wherein the determining the transmission parameter corresponding to the second unicast resource according to the information fed back by the second node comprises:

transmitting a second reference signal to the second node;

receiving second feedback information for slow fading feedback from the second node;

and adjusting the second unicast resource of the first node according to the second feedback information.

9. The method of claim 1, wherein the determining the transmission parameter corresponding to the second unicast resource according to the information fed back by the second node comprises:

receiving third feedback information fed back for same frequency, different frequency or background noise from the second node;

and adjusting subsequent transmission parameters corresponding to the second unicast resource according to the third feedback information.

10. The method of claim 9, wherein the third feedback information is used for indicating a channel interference condition of the second node, or wherein the third feedback information is used for indicating a received signal strength indication of the second node.

11. A unicast resource allocation method applied to a second node is characterized in that the method comprises the following steps:

receiving, from a first node, traffic-related information of the first node;

determining a first unicast resource and a corresponding transmission parameter of the first node according to the perception information of the second node and the service-related information of the first node; and

sending information of the first unicast resource to the first node; or,

feeding back related information to a first node, wherein the related information is used for determining or adjusting transmission parameters corresponding to a second unicast resource of the first node;

the feeding back the relevant information to the first node includes:

receiving a scheduling assignment, SA, from the first node;

determining transmission parameters for the first node according to the SA and the information sensed by the second node;

transmitting the transmission parameters to the first node.

12. The method of claim 11, further comprising:

receiving a reception situation of control information of a first node from the first node;

selecting transmission parameters for the first node according to the information sensed by the second node and the receiving condition;

transmitting the transmission parameters to the first node.

13. The method of claim 11, wherein feeding back the relevant information to the first node comprises:

receiving a first reference signal from the first node;

transmitting Channel Quality Indication (CQI) information of the first reference signal to the first node.

14. The method of claim 13, wherein the second unicast resource of the first node and the position of the first reference signal have a corresponding mapping relationship.

15. The method of claim 11, wherein feeding back the relevant information to the first node comprises:

sending first feedback information to the first node, wherein the first feedback information is used for indicating at least one of the following: an acknowledgement ACK of the second node, a non-acknowledgement NACK of the second node, a signal-to-noise ratio SNR of the second node, and a reception power of the second node.

16. The method of claim 11, wherein feeding back relevant information to the first node comprises:

receiving a second reference signal from the first node;

and sending second feedback information of the slow attenuation feedback to the first node.

17. The method of claim 11, wherein feeding back relevant information to the first node comprises:

and sending third feedback information for same frequency, different frequency or background noise feedback to the first node.

18. The method of claim 17, wherein the third feedback information is used for indicating a channel interference situation of the second node, or wherein the third feedback information is used for indicating a received signal strength indication of the second node.

19. A first node, comprising: a first transceiver and a first processor, wherein,

the first transceiver is configured to receive information of a first unicast resource from a second node, where the first unicast resource and corresponding transmission parameters are determined by the second node for the first node according to awareness information of the second node and service-related information of the first node;

the first processor is configured to determine a second unicast resource of the first node, and determine a transmission parameter corresponding to the second unicast resource according to the relevant information fed back by the second node;

the first processor is further configured to send a scheduling assignment SA to the second node on a physical sidelink control channel PSCCH; receiving transmission parameters from the second node, the transmission parameters selected by the second node for the first node according to the SA and information perceived by the second node.

20. A second node, comprising: a second transceiver and a second processor, wherein,

the second transceiver is used for receiving information related to the service of the first node from the first node;

the second processor is configured to determine a first unicast resource and a corresponding transmission parameter of the first node according to the sensing information of the second node and the service-related information of the first node;

the second transceiver is further configured to send information of the first unicast resource to the first node;

the second transceiver is further configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node;

the second transceiver further configured to receive a scheduling assignment, SA, from the first node; determining transmission parameters for the first node according to the SA and the information sensed by the second node; transmitting the transmission parameters to the first node.

21. A first node, comprising:

a first determining module, configured to determine a second unicast resource of the first node, and determine a transmission parameter corresponding to the second unicast resource according to related information fed back by the second node;

the first determining module is further configured to send a scheduling assignment SA to the second node on a physical sidelink control channel PSCCH; receiving transmission parameters from the second node, the transmission parameters selected by the second node for the first node according to the SA and information perceived by the second node.

22. A second node, comprising:

a second determining module, configured to determine a first unicast resource and a corresponding transmission parameter of the first node according to the sensing information of the second node and the service-related information of the first node; and

a feedback module, configured to feed back related information to a first node, where the related information is used to determine a transmission parameter corresponding to a second unicast resource of the first node;

the feedback module is configured to receive a scheduling assignment SA from the first node; determining transmission parameters for the first node according to the SA and the information sensed by the second node; transmitting the transmission parameters to the first node.

23. A user device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, the program when executed by the processor implementing the steps of the unicast resource allocation method according to any one of claims 1 to 10; alternatively, the steps of implementing the unicast resource allocation method according to any one of claims 11 to 18.

24. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the unicast resource allocation method according to any one of claims 1 to 10; alternatively, the steps of implementing the unicast resource allocation method according to any one of claims 11 to 18.