CN113133118A

CN113133118A - Carrier wave determining method and device and readable storage medium

Info

Publication number: CN113133118A
Application number: CN202010044245.XA
Authority: CN
Inventors: 王达
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2021-07-16
Anticipated expiration: 2040-01-15
Also published as: WO2021143493A1; CN113133118B

Abstract

The application discloses a carrier wave determining method, a carrier wave determining device and a readable storage medium, wherein the method comprises the following steps: the first user equipment selects at least one carrier for communicating with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment; the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device. The method introduces channel quality to select the carrier, namely the change of the channel state can be considered when selecting the carrier, thereby improving the reliability of service transmission between user equipment, and when selecting the carrier according to the indication of the indication equipment, the problem of the carrier selection method or the single carrier selection mode in the related technology can be solved.

Description

Carrier wave determining method and device and readable storage medium

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a carrier determination method, an apparatus, and a readable storage medium.

Background

The V2X (vehicle to outside information exchange) technology can realize wireless communication between vehicles, vehicle and roadside infrastructure, vehicle and passerby, vehicle and network, and can sense the surrounding conditions of vehicles in real time or share road information and perform early warning in time, so it has become a research hotspot for technicians in the field to solve the problem of road safety in the current world.

In the LTE (Long Term Evolution) V2X technology (i.e., Rel-14LTE V2X technology) in the related art, a PC5 interface (also referred to as a direct link, described as sildelink in the protocol) broadcast communication for transmitting data between a User Equipment (User Equipment) and the User Equipment can already support transmission of basic traffic based on road security. With the further development of the car networking technology, NR (New Radio, New air interface) V2X shows some New application scenarios at present compared with LTE V2X, for example: vehicle formation, advanced driving, sensor information sharing, remote control and the like. Therefore, for NR V2X unicast, multicast and broadcast services, in order to improve transmission reliability and transmission rate, a multi-carrier transmission mechanism is introduced, i.e. a terminal can send signal information to another terminal on multiple carriers. However, the inventor finds that in the related art carrier selection or carrier reselection mechanism, the reliability of service transmission is low and the mode is single.

Disclosure of Invention

The application provides a carrier determination method, a carrier determination device, user equipment, a base station and a readable storage medium, which are used for solving at least one problem of low reliability of service transmission and single carrier selection mode in a carrier selection or carrier reselection mechanism in the related art.

The application provides a carrier wave determining method, which comprises the following steps:

the first user equipment selects at least one carrier for communicating with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device.

The method for determining a carrier provided in the foregoing embodiment may be applied to a first user equipment, and by this means, the first user equipment may select a carrier in multiple ways. One is that the first user equipment is carried out according to the channel quality of the carrier; the other is based on the indication information of the pointing device. Therefore, the first user equipment can select the carrier for communication.

Optionally, the selecting, by the first user equipment, at least one carrier for communicating with at least one second user equipment includes:

the first user equipment selects at least one carrier used for communicating with at least one second user equipment during carrier initial selection; or,

upon carrier reselection, the first user equipment selects at least one carrier for communication with at least one second user equipment.

The method enables the same carrier selection mode to be adopted for both initial selection and reselection of the carrier.

Optionally, determining whether carrier reselection is required includes:

the first user equipment determines whether carrier reselection is needed or not according to the indication information of the indication equipment; or,

and the first user equipment determines whether carrier reselection is needed or not according to the channel quality of the carrier.

This approach gives an embodiment of the determination of whether carrier reselection is required, such that determining whether carrier reselection is required may be performed in accordance with channel quality or an indication.

Optionally, the channel quality of the carrier includes: channel state information of a carrier or hybrid automatic repeat request (HARQ) information fed back by the second user equipment;

wherein the channel state information comprises at least one of the following parameters: channel state information CSI, channel quality indication CQI, rank information RI, reference signal received power RSRP, reference signal received quality RSRQ, signal to interference plus noise ratio SINR, received signal strength indication RSSI, block error rate, bit error rate, and sounding reference signal SRS information measured by the first user equipment.

The method enables the selection of the carrier or the judgment of whether to trigger reselection to be carried out according to some commonly used channel quality information, so that the implementation of the embodiment of the application is simpler and more convenient.

Optionally, the determining, by the first user equipment, whether carrier reselection is required according to the channel state information of the carrier includes:

and determining whether carrier reselection is needed or not according to a first comparison result of the channel state information of the carrier and a first threshold.

The method provides a specific implementation mode for determining whether carrier reselection is needed or not according to the channel state of the carrier, so that the determination of whether carrier reselection is needed or not can be realized by comparing thresholds.

The method further provides a specific implementation mode for determining whether the carrier reselection is needed or not according to the channel state of the carrier, so that the determination of whether the carrier reselection is needed or not can be realized by comparing thresholds.

Optionally, the determining, by the first user equipment, whether carrier reselection is needed according to HARQ information fed back by the second user equipment includes:

determining a target value according to the HARQ information;

and determining whether carrier reselection is needed or not according to a second comparison result of the target value and a second threshold.

The method provides a specific implementation mode for determining whether the carrier needs to be reselected according to the HARQ information fed back by the second user equipment, and the purpose of determining whether the carrier needs to be reselected based on the HARQ information is achieved.

Optionally, the HARQ information includes at least one of the following information: ACK correctly acknowledged, NACK incorrectly acknowledged, and DTX discontinuously transmitted.

This approach gives some HARQ information that may be employed.

Optionally, if the first user equipment and the second user equipment perform transmission through unicast communication, the target value is the number of designated information in HARQ information fed back by the second user equipment; or,

the target value is the ratio of the number of the designated information to the number of the fed-back HARQ information;

wherein the specific information is NACK and/or DTX, or the specific information is ACK.

This approach gives a determination way in which the target value can be easily determined in the unicast case.

Optionally, if data transmission is performed between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is a ratio of the number of designated information in the HARQ information fed back by the second user equipment to the number of the HARQ information fed back; or,

if data transmission is carried out between the first user equipment and the second user equipment through multicast communication, the target value is the ratio of the number of the designated information to the number of the second user equipment in multicast;

This method provides a determination method that can easily determine a target value in the multicast or broadcast case.

determining candidate carriers;

at least one carrier is selected from the candidate carriers for communication with at least one second user equipment.

The method provides a mode that the candidate carriers can be determined firstly when the carriers are selected, and then the carriers are selected from the candidate carriers, so that the selected carriers are more beneficial to communication.

Optionally, determining the candidate carrier includes:

determining whether the carrier is used as a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold; or,

and the first user equipment determines the candidate carrier according to the identifier of the candidate carrier carried in the indication information.

This approach gives a way in which candidate carriers can be determined by interactive indication.

Optionally, the selecting, by the first user equipment, at least one carrier from the candidate carriers includes:

at least one carrier is selected in order of channel quality of the candidate carriers.

The method also can sequence the candidate carriers according to the channel quality if a plurality of determined candidate carriers exist, so that the candidate carriers are selected from high to low, and the channel quality of the selected carriers is better.

Optionally, the indication information includes: selecting order information, the selecting order information being used for instructing the first user equipment to select information of at least one carrier according to an order of channel qualities of candidate carriers.

The method can also select the carrier with better channel quality by acquiring the selection sequence information of the candidate carrier from the indication information.

Optionally, the indication information includes:

indication information used for indicating whether the currently used carrier needs to be subjected to carrier reselection; or,

and the carrier reselection identification information is used for indicating that carrier reselection is required.

This approach provides that the carrier for which reselection of the carrier is required can be determined from the indication information.

the indication equipment sends indication information to first user equipment, wherein the indication information is used for indicating the first user equipment to select at least one carrier used for communicating with at least one second user equipment;

Optionally, the sending, by the indicating device, the indication information to the first user equipment includes:

when the carrier is initially selected, the indicating equipment sends indicating information to the first user equipment; or,

and when the carrier wave is reselected, the indicating equipment sends indicating information to the first user equipment.

Optionally, determining whether carrier reselection is required includes:

the indication equipment determines whether carrier reselection is needed or not according to the channel quality of the carrier;

optionally, the channel quality of the carrier includes: channel state information or HARQ information of the carrier;

wherein the channel state information comprises one or a combination of the following information: channel State Information (CSI), Channel Quality Indicator (CQI), Rank Information (RI), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), Received Signal Strength Indicator (RSSI), block error rate and bit error rate;

if the indication equipment is second user equipment, the HARQ information is determined by the second user equipment; and if the indication equipment is network side equipment, the HARQ information is fed back by the second user equipment.

Optionally, the determining, by the indicating device, whether carrier reselection is required according to the channel state information of the carrier includes:

Optionally, the determining, by the indicating device, whether carrier reselection is required according to the HARQ information includes:

determining a target value according to the HARQ information;

Optionally, if the first user equipment and the second user equipment perform transmission through unicast communication, the target value is the number of the designated information in the HARQ information; or,

the target value is the ratio of the number of the designated information to the number of the HARQ information;

determining candidate carriers;

generating an identifier of the candidate carrier, and carrying the identifier of the candidate carrier in the indication information; wherein the identification of the candidate carriers is for the first user equipment to select at least one carrier from the candidate carriers for communication with at least one second user equipment.

Optionally, determining the candidate carrier includes:

and determining whether the carrier is used as a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold.

and sorting the channel quality of the candidate carriers from high to low, and generating selection order information.

Optionally, the indication information includes one of the following:

The application provides a carrier wave determining device, which comprises:

a selecting unit, configured to select, by a first user equipment, at least one carrier used for communication with at least one second user equipment according to channel quality of the carrier or according to indication information of an indication device;

The application provides a carrier wave determining device, which comprises:

a sending unit, configured to instruct a device to send indication information to a first user equipment, where the indication information is used to instruct the first user equipment to select at least one carrier used for communication with at least one second user equipment;

The application provides a first user equipment, comprising: a processor, a memory, and a transceiver;

the memory to store computer instructions;

the processor configured to execute the computer instructions to implement the method applied to the first user equipment according to any one of the above;

the transceiver is used for receiving and transmitting data under the control of the processor.

The application provides an indicating device, including: a processor, a memory, and a transceiver;

the memory to store computer instructions;

the processor is used for executing the computer instructions to realize the method applied to the pointing device;

The present application provides a computer readable storage medium storing computer instructions which, when executed by a processor, implement any of the above methods applied to a first user equipment or a pointing device.

The method introduces channel quality to select the carrier, namely the change of a channel state can be considered when selecting the carrier, so that the reliability of service transmission between user equipment can be improved, and the problem of a real carrier selection method or a single carrier selection mode in the related technology can be solved when selecting the carrier according to the indication of indication equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or prior arts will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a system architecture diagram according to an embodiment of the present application;

fig. 2 is a timing diagram of a carrier determination method according to a first mode of the embodiment of the present application;

fig. 3 is a timing chart of a carrier determination method according to the second mode in the embodiment of the present application;

fig. 4 is another timing diagram of a carrier determination method according to the second mode in the embodiment of the present application;

fig. 5 is a flowchart illustrating a method for determining a carrier according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first user equipment according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a pointing device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a carrier determination apparatus according to an embodiment of the present application;

fig. 9 is a schematic diagram of a device for determining a carrier according to an embodiment of the present application.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

Some terms appearing herein are explained below:

1. in the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

2. ACK (acknowledgement) information indicating that the received Character is error-free. The receiving station checks the received message and, if no errors are found, sends an acknowledgement ACK to the sending station, indicating that the message has been correctly received and is ready to receive the next message. The control characters may be transmitted by the central node or by remote nodes.

3. NACK (Negative acknowledgement) information, the receiving station checks the received message, and if an error is found, it sends NACK to the sending station, indicating that the message is erroneous, and requests retransmission.

4. BLER (Block Error Rate) refers to the percentage of the erroneous Block out of all transmitted blocks. The block error rate is a long-term statistical average quantity and is an important index reflecting the network performance and service quality.

In a wireless network, one device transmits data to another device in blocks (blocks). The transmitting end calculates a Cyclic Redundancy Check (CRC) using the data in the block and transmits the CRC to the receiving end along with the block. The receiving end calculates a CRC according to the received data, compares the CRC with the received CRC, if the CRC is equal to the received CRC, the receiving end considers that the correct data is successfully received, and recovers an ACK to the transmitting end. If the two are not equal, the receiving end considers that the wrong data is received, and replies a NACK to the transmitting end to request the transmitting end to retransmit the block. For example, assuming that 500 blocks of data are sent, where 499 blocks reply ACKs and 1 block replies NACKs, the BLER is 1/500-0.002-100-0.2%.

5. SER (Symbol Error Rate) is an index for measuring the accuracy of data transmission within a specified time, and the Error Rate is 100% of the Error code in transmission/total number of transmitted codes. In addition, the error rate is also defined as a measure of the frequency of occurrence of errors. The research on the error rate under specific conditions is carried out, and the method has great significance for enhancing the performance of a wireless communication system and improving the data transmission quality.

6. HARQ (Hybrid Automatic Repeat Request), which is a technology formed by combining forward error correction coding (FEC) and Automatic Repeat Request (ARQ). And the receiver stores the received data under the condition of decoding failure, and requires the sender to retransmit the data, and combines the retransmitted data with the previously received data and then decodes the data.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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 application.

The present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 illustrates a schematic system architecture suitable for the embodiment of the present application, as shown in fig. 1, in a future 5G system architecture, a user equipment 101 and a user equipment 102 may communicate with a core network device 104 via an access network entity 103, and the user equipment may refer to a UE, an access user equipment, a subscriber unit, a subscriber station, a mobile station, a remote user equipment, a mobile device, a user equipment, a wireless communication device, a user agent or a user equipment. The access user equipment may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a user equipment in a future 5G network, etc. For convenience of description, fig. 1 only illustrates 2 pieces of user equipment, and in an actual network, multiple pieces of user equipment may coexist, which is not described herein again.

AN Access Network (AN) entity 103, which may also be referred to as a Radio Access Network (R) entity, and hereinafter referred to as AN Access Network entity (R) AN entity, is mainly responsible for providing wireless connection for the user equipment 101 and the user equipment 102, and ensuring reliable transmission of uplink and downlink data of the user equipment 101 and the user equipment 102. The Access network entity 103 may be a next generation Base Station (gNB) in a 5G System, may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, may also be a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, may also be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) System, and the like, and optionally, the Access network entity in the embodiment of the present invention is a satellite Base Station.

The core network device 104 is responsible for connecting the user equipment to different networks according to a call request or a data request sent by the user equipment through an access network, and performing charging, mobility management and the like. The Core network device may be an Evolved Packet Core (EPC) of a 4G Core network or a 5G Core network device.

The link between the user equipment 101 and the user equipment 102, which communicates with the core network device 104 via the access network entity 103, is a cellular communication link between the network and the user equipment, which may also be referred to as Uu link, and the corresponding interface is referred to as Uu interface, while the link between the user equipment 101 and the user equipment 102 is a direct communication link between the equipment and the device, which may also be referred to as sildelink, and the corresponding wireless interface is referred to as a direct communication interface, which is also referred to as sildelink interface.

It should be noted that the above system architecture is only an example of the system architecture applicable to the embodiment of the present application, and the system architecture applicable to the embodiment of the present application may also add other entities or reduce part of the entities compared to the system architecture shown in fig. 1.

The devices close to each other allow direct communication between the devices, and typical direct communication scenarios include the following three types:

1. one-to-one communication (also called unicast) between direct communication devices;

2. a device can send the same data (also called multicast) to all devices in a communication group at a time;

3. a device can send the same data (also called a broadcast) to all nearby devices at once.

The following presents background information related to direct communication for two different systems:

introduction to related background for direct communication of LTE systems:

the devices that communicate directly may all be on-line or off-line, or some may be on-line and some off-line. The devices participating in direct communication, i.e. on-line, are located within the coverage of the 3GPP base station communication carrier, and the devices participating in direct communication, i.e. off-line, are not located within the coverage of the 3GPP base station communication carrier.

It should be noted that the direct communication scenario supported by the LTE system is only broadcast.

Introduction of related background of direct communication of (two) NR (New Radio, New air interface) system:

the direct communication of the NR system introduces unicast and multicast, and introduces feedback in unicast and multicast, that is, the receiving end may feed back Channel State Information CSI (CSI) and/or HARQ (Hybrid Automatic Repeat Request) feedback Information to the transmitting end.

In the related art carrier selection or carrier reselection mechanism, the reliability of service transmission is low and the mode is single.

In view of the above, the present application provides a method for determining a carrier, which is implemented by a first user equipment and a second user equipment through direct communication; or, the selection of the carrier is realized through a network side device (e.g., a base station) for enabling the first user equipment to communicate with the second user equipment, or whether the reselection of the carrier is required is determined.

The selection of carriers and carrier re-selection in the present application can take into account channel state changes, so as to select carriers or determine whether to trigger reselection in combination with the influence of channel state changes.

For example, the first user equipment sends signal information to the second user equipment, and the second user equipment performs measurement according to the received signal information to obtain the channel quality of the carrier.

In a possible implementation manner, the second user equipment sends the measured channel quality of the carrier to the first user equipment, so that the first user equipment selects the carrier according to the channel quality of the carrier, or determines whether the carrier needs to be reselected.

Another possible implementation manner is that the second user equipment performs carrier selection according to the channel quality of the carrier, or determines whether carrier reselection is required. Or the second user equipment sends the measurement result of the channel quality of the carrier to the network side equipment, so that the network side equipment selects the carrier according to the channel quality of the carrier, or determines whether the carrier needs to be reselected.

By the embodiment, the second user equipment or the network side equipment sends the indication information to the first user equipment, so that the first user equipment selects the carrier according to the indication information, or determines whether to reselect the carrier. Thereby providing various implementations for carrier selection or determining whether to reselect a carrier; and the carrier is selected according to the channel quality of the carrier, or whether the carrier is reselected is determined, so that the reliability is improved. In addition, the problem of single carrier selection and reselection mode in the prior art can be solved by selecting or reselecting the carrier through the indication of the indicating equipment.

Wherein, the channel quality of the carrier comprises: channel state information of a carrier or HARQ information fed back by the second user equipment.

The channel state information includes one or a combination of the following information:

CSI (Channel State Information);

CQI (Channel Quality Indicator);

RI (rank Indication, rank information);

SINR (Signal to Interference plus Noise Ratio);

RSRP (Reference Signal Receiving Power);

RSRQ (Reference Signal Receiving Quality);

RSSI (Received Signal Strength Indication);

CR (Channel occupancy ratio);

block error rate;

error rate;

SRS (Sounding Reference Signal) information measured by the first user equipment.

The HARQ information includes at least one of the following instructions:

ACK (acknowledgement);

NACK (Negative acknowledgement);

DTX (Discontinuous Transmission).

The design idea of the application is mainly divided into two parts:

one), since the selection carrier is divided into two possible scenarios: primary carrier selection and carrier reselection. In a carrier reselection scenario, the first user equipment has carriers currently in use, and therefore it needs to specifically determine which carriers in the carriers currently in use belong to carriers that need to be reselected, so as to determine whether carrier reselection is needed, and further select a carrier.

Second), carrier selection is performed, and the part is applicable to both the two possible scenarios (carrier initial selection and carrier reselection).

Based on the design idea of the present application, the following description will be divided into two parts with reference to the accompanying drawings, and the specific contents are as follows:

a first part: in a carrier reselection scenario, it is determined whether a reselection of a carrier needs to be triggered.

In a carrier reselection scenario, determining whether a carrier reselection is required may be mainly determined in the following two ways:

it should be noted that the following two manners of determining whether to reselect a carrier are merely examples, and do not limit the scope of the embodiments of the present application.

The first method is as follows: and the first user equipment determines whether carrier reselection is needed or not according to the channel quality of the carrier.

Wherein, the channel quality of the carrier comprises: and the first user equipment determines whether the carrier needs to be reselected according to the channel state information of the carrier or the HARQ information fed back by the second user equipment.

In addition, the second user equipment includes at least one user equipment, for example, when unicast communication is performed between the direct communication terminals, the number of the second user equipment is 1; when the direct communication is multicast communication or broadcast communication, the second user equipment may be plural. The number of second user equipments is not limited here.

(1) If the first user equipment determines whether carrier reselection is required according to the channel state information of the carrier, in implementation, it may determine whether carrier reselection is required according to a first comparison result between the channel state information of the carrier and a first threshold.

In the above embodiment, the channel state information includes one or a combination of the following information: CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, CR, block error rate, bit error rate, SRS measured by the first user equipment.

In implementation, the channel state information of the carrier may be that, after receiving the signal information sent by the first user equipment, the second user equipment measures the corresponding channel state information according to the signal information and obtains a measurement result, and then feeds back the measurement result of the channel state information to the first user equipment, for example, CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, and the like.

If necessary, the SRS information may be sent to the first user equipment through the second user equipment, so that the first user equipment performs corresponding operations according to the SRS information, for example, the first user equipment determines whether to trigger carrier reselection according to the SRS information. Or selecting a carrier according to the SRS information.

It should be noted that, since the information indicating the channel state information has multiple types or multiple combinations, the first threshold described above does not represent a certain value, and only indicates the threshold reaching the carrier reselection condition corresponding to each information type. For example, values of different information types have different dimensions, and the different information types may meet thresholds of corresponding carrier reselection conditions.

For different types of channel state information, the first user equipment determines whether the carrier reselection is required to be performed in different modes according to a first comparison result between the channel state information of the carrier and a first threshold:

1. the channel state information comprises at least one of CSI, CQI, RI, SINR, RSRP, RSRQ and RSSI;

and after receiving the measurement result of the information by the second user equipment, the first user equipment judges. In specific implementation, if the channel state information of the carrier of the information is less than or equal to a first threshold corresponding to each piece of information, determining that the carrier needs to be reselected; and if the channel state information of the carrier of the information is greater than or equal to the first threshold corresponding to each piece of information, determining that the carrier does not need to be reselected.

It should be noted that the processing manner of being less than or equal to, or being greater than or equal to in the foregoing embodiments is only one possible example, and is determined according to actual needs, and therefore, the embodiments of the present application are not limited. In addition, the processing manner of being less than or equal to, or being greater than or equal to the processing manner in the following embodiments is also a possible example, and may be determined according to actual needs, and does not constitute a limitation on the embodiments of the present application, and therefore, details are not described in the following embodiments.

For example, when CSI is used alone, the CSI may be compared to a corresponding threshold. When multiple kinds of channel state information are integrated, for example, when the CSI and the CQI are adopted, the comparison result of the CSI with the corresponding first threshold and the comparison result of the CQI with the corresponding first threshold may be determined respectively. And if the comparison result of the CSI is lower than the corresponding threshold and the comparison result of the CQI is higher than the corresponding first threshold, determining that carrier reselection needs to be triggered according to the comparison result of the CSI. That is, when multiple kinds of channel state information are synthesized, the various kinds of channel state information may be respectively compared with the corresponding first thresholds, and if any one of the comparison results indicates that carrier reselection is required, it is determined that carrier reselection is required.

It should be noted that, when the channel state information adopted by the first threshold is different, values of the first thresholds corresponding to the channel state information may be different or the same, and may be determined according to actual requirements, which is not limited in the present application.

2. The channel state information comprises at least one of CR, block error rate and bit error rate;

and the second user equipment determines the measurement result of the channel state information and sends the measurement result to the first user equipment for judgment. In specific implementation, if the channel state information of the carrier of the information is greater than or equal to a first threshold corresponding to each piece of information, determining that the carrier needs to be reselected; and if the channel state information of the carrier of the information is less than or equal to the first threshold corresponding to each piece of information, determining that the carrier does not need to be reselected.

Specifically, the first user equipment sends signal information to the second user equipment, and the second user equipment determines a measurement result of the CR according to the received signal information; or the second user equipment determines the block error rate and the bit error rate of the carrier according to the received data packet of the signal information.

Or the second user equipment counts the number of NACK and/or the number of DTX, divides the statistical result by the number of (ACK + NACK + DTX), and takes the obtained ratio as the block error rate and the bit error rate of the obtained carrier.

It should be noted that the block error rate and the bit error rate may be obtained only by performing data statistics for a period of time, and if the block error rate and the bit error rate are selected as parameters of the channel state information, for each first user equipment, the second user equipment may perform statistics on correctness and errors of a first measured signal data packet received within a preset time period and sent by the first user equipment, so as to obtain the block error rate and the bit error rate of a carrier corresponding to the first user equipment.

Or, the second user equipment may further determine the block error rate and the bit error rate of the carrier by:

the first user equipment sends signal information to the second user equipment, the second user equipment carries out HARQ feedback to the first user equipment according to the received data packet of the signal information, the first user equipment determines the block error rate and the bit error rate of a carrier according to the HARQ feedback, and the first user equipment returns the determined block error rate and the determined bit error rate to the second user equipment.

The first user equipment counts the number of NACK and/or the number of DTX, divides the counting result by the number of (ACK + NACK + DTX), and takes the obtained ratio as the block error rate and the bit error rate of the carrier.

After obtaining the block error rate and/or the bit error rate, the first user equipment itself or an indication device (e.g., a second user equipment or a network side device) may determine whether to trigger carrier reselection. In implementation, the carrier reselection may be triggered according to a comparison result of the comparison with the corresponding first threshold. For example, when the comparison result is greater than or equal to the first threshold, it is determined to trigger carrier reselection, and when the comparison result is not less than or equal to the first threshold, carrier reselection does not need to be triggered.

3. An SRS measured by the first user equipment;

the SRS signal is used for the first user equipment to measure, so as to obtain channel state information, and the first user equipment determines whether carrier reselection is required according to the measured channel state information.

The determining manner of the first threshold in the above embodiment may be configured according to a configuration selection manner of the state of the user equipment or a pre-configuration selection manner.

One possible implementation is that the configuration is performed via a network; for example, for a user equipment in a connected state, the network may configure the first threshold through dedicated signaling; alternatively, for user equipment on the network, the network may configure the first threshold by broadcast signaling.

In another possible implementation manner, for the user equipment which is off-line, the network may also configure a first threshold in a pre-configured manner; of course, for any state of user equipment, it can be configured in a pre-configured manner.

The determination of the first threshold may also be related to a traffic priority. For example, if the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI, the higher the service priority, the smaller the first threshold corresponding to each information; if the channel state information comprises at least one of CR, block error rate and bit error rate; the higher the service priority is, the larger the first threshold corresponding to each piece of information is; therefore, the service interruption caused by the carrier reselection can be avoided as much as possible by the service with high priority.

(2) If the first user equipment determines whether carrier reselection is needed according to the HARQ information fed back by the second user equipment, and when the carrier reselection is carried out, a target numerical value is determined according to the HARQ information; and determining whether carrier reselection is needed or not according to a second comparison result of the target value and a second threshold.

In the above embodiment, the HARQ information includes at least one of the following instructions: ACK, NACK, DTX.

Similar to the obtaining mode of the channel state information of the carrier, after the first user equipment sends the signal information to the second user equipment, the second user equipment feeds back the HARQ information according to the signal information.

For convenience of description hereinafter, the specific information may be first defined as NACK and/or the DTX, or the specific information may be defined as ACK.

In implementation, if the first user equipment and the second user equipment are transmitted through unicast communication, the target value is the number of designated information in the HARQ information fed back by the second user equipment; or, the target value is a ratio of the number of the designated information to the number of the fed-back HARQ information.

For example, the designated information is NACK and/or the DTX, and the target value is the number of NACKs and/or the DTX in the HARQ information fed back by the second ue; determining that carrier reselection is needed when the number of the received NACKs and/or DTXs is greater than or equal to a second threshold corresponding to the NACKs and/or the DTXs; and when the number of the received NACKs and/or DTXs is less than or equal to a second threshold value corresponding to the NACKs and/or the DTXs, determining that the carrier reselection is not needed.

It should be noted that the second threshold is a carrier reselection threshold for determining whether to perform carrier reselection according to the HARQ information. The second threshold in this embodiment is similar to the first threshold, and when the adopted specific information is different, the values of the second thresholds corresponding to the specific information may be different or the same, and may be determined according to actual needs, which is not limited in this application.

Or if the designated information is ACK and the target value is the ratio of the number of ACKs to the number of fed-back HARQ information, determining that carrier reselection is required when the total number of received ACKs and fed-back HARQ information is less than or equal to a second threshold corresponding to ACK; and when the total number of the received ACK and the fed-back HARQ information is greater than or equal to a second threshold corresponding to the ACK, determining that carrier reselection is not required.

If data transmission is performed between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is the ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or, if data transmission is performed between the first user equipment and the second user equipment through multicast communication, the target value is a ratio of the number of the designated information to the number of the second user equipment in multicast.

For example, if the transmission is performed through broadcast communication, and the designated information is NACK and/or DTX, the target value is a ratio of NACK in the HARQ information fed back by the second user equipment and/or the number of DTX to the number of fed back HARQ information, and when the ratio of the number of received NACK and/or DTX to the number of fed back HARQ information is greater than or equal to a second threshold corresponding to NACK and/or DTX, it is determined that carrier reselection is required; and when the ratio of the number of the received NACKs and/or DTXs to the number of the fed-back HARQ information is less than or equal to a second threshold corresponding to the NACKs and/or DTXs, determining that carrier reselection is not needed.

In the above manner, for example, if the number of received NACKs is 5, the number of DTX is 1, and the total number of the number of HARQ information is 10, then several possible results of the target value include: 5/10, 1/10, 6/10 (where 6 is the number of NACKs 5+ the number of DTXs 1). After the ratio is determined, the ratio is compared to its corresponding second threshold. Wherein, the corresponding second thresholds can be the same or different.

Similarly, the second threshold in this embodiment may be configured by the network according to a configuration selection manner or a configuration selection pre-configured manner, similar to the determination manner of the first threshold, and is not described herein again.

In addition, the determination of the second threshold may also be related to traffic priority. For example, if the specific information is NACK and/or DTX, the higher the service priority is, the larger the second threshold corresponding to NACK and/or DTX is; if the designated information is ACK, the higher the service priority is, the smaller the second threshold corresponding to ACK is. Therefore, the method can ensure that the carrier reselection is avoided as much as possible for the high-priority service, because the carrier reselection may cause service interruption for a period of time.

Referring to fig. 2, a timing chart of a carrier determination method according to a first embodiment of the present application includes:

step 201: and sending the signal information or the data packet to the second user equipment.

If the first user equipment determines whether carrier reselection is needed according to the channel state information, the first user equipment sends signal information to the second user equipment; or if the first user equipment determines whether carrier reselection is needed according to the HARQ information, the data packet is sent to the second user equipment by the first user equipment.

Step 202: and receiving the channel state information or HARQ information fed back by the second user equipment.

Step 203: and judging whether carrier reselection is needed or not according to a threshold.

Step 204: and determining whether to perform carrier reselection according to the judgment result.

The second method comprises the following steps: the first user equipment determines whether carrier wave repetition is needed or not according to the indication information of the indication equipment Selecting。

The indication device is a network side device accessed by the first user device or a second user device communicated with the first user device. The indication information includes: indication information used for indicating whether the currently used carrier needs to be subjected to carrier reselection; or, carrier reselection identification information for indicating that carrier reselection is required.

For example, after the indication device determines the carriers currently in use one by one, the determination results of all carriers are sent to the first user equipment, and then the first user equipment can determine whether each selected carrier needs to perform a carrier reselection result according to the indication information, so as to execute the next action; or, the carrier reselection identifier required for carrier reselection is included.

For example, if the indication device determines, after determining for each carrier currently in use, a carrier identifier that needs to be reselected in the currently-used carriers is sent to the first user equipment, after receiving the indication information, the first user equipment may determine that only the carrier corresponding to the received carrier identifier needs to be reselected, and the carrier not corresponding to the carrier identifier does not need to be reselected, and may continue to be used.

Further, after the first user equipment determines the carrier needing to be reselected according to the indication information or the carrier identifier; the sending of the service message to the at least one second user equipment based on the carrier needing to be reselected is stopped.

(1) If the indication device is the second user equipment, the second user equipment may notify the indication information to the first user equipment after determining whether carrier reselection is required according to the channel state information of the carrier or according to the determined HARQ information, so that the first user equipment determines whether carrier reselection is required.

In addition, the second user equipment determines whether carrier reselection is required according to the channel state information of the carrier or according to the determined HARQ information, and the specific determination manner is, for example, the specific implementation manner of determining whether carrier reselection is required in the first manner, which is not described herein again.

It should be noted that the indication information of the second ue may be notified through signaling such as SL RRC (sidelink Radio Resource Control) or SL MAC CE (sidelink MAC Control Element).

In an embodiment, if notified by the SL RRC signaling, the SL RRC signaling may include an Information Element (IE) for indicating the first ue to determine whether to perform carrier reselection, such as the aforementioned carrier identifier. Further, the SL RRC message further includes one or more of source L2ID (source layer L2 identifier), destination L2ID (destination L2 identifier), SLRB ID (direct link radio bearer SLRB identifier), or LCID (logical channel identifier LCID), which is used to distinguish that the SL RRC signaling is sent by the second ue to the first ue.

Further, the SL RRC signaling optionally further includes a carrier ID as the aforementioned indication information for indicating whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be carrier reselected is set to 0, and a carrier ID that does not need to be carrier reselected is set to 1, thereby indicating which carrier needs to be carrier reselected by the first user equipment.

In another embodiment, if the notification is performed through SL MAC CE signaling, the SL MAC CE signaling is used to instruct the first ue to determine whether carrier reselection is required. The SL MAC CE signaling further includes one or more of source L2ID, destination L2ID, SLRB ID, or LCID, and is used to distinguish that the SL MAC CE message is sent from the second user equipment to the first user equipment.

Further, the SL MAC CE message may optionally include a carrier ID as the aforementioned indication information for indicating whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be carrier reselected is set to 0, and a carrier ID that does not need to be carrier reselected is set to 1, thereby indicating which carrier needs to be carrier reselected by the first user equipment.

Referring to fig. 3, a timing chart of a carrier determination method according to the second embodiment of the present application is shown, including:

step 301: the first user equipment sends signal information or data packets to the second user equipment.

Step 302: and the second user equipment judges whether carrier reselection is needed or not according to the threshold.

If the second user equipment receives the signal information of the first user equipment, determining a measurement result of the channel state information according to the signal information; or, if the second user equipment receives the data packet of the first user equipment, determining the HARQ information to be fed back according to the data packet. And then, determining whether carrier reselection is needed according to the channel state information or the HARQ information.

Step 303: the first user equipment receives the indication information sent by the second user equipment.

The indication information is used for indicating whether the first user equipment needs to perform carrier reselection.

Step 304: and the first user equipment determines whether to perform carrier reselection according to the indication information.

(2) If the indication device is a network side device, such as a base station, the network side device notifies the first user equipment of the indication information after determining whether carrier reselection is required, so that the first user equipment determines whether carrier reselection is required.

In addition, in an embodiment, the network side device determines whether carrier reselection is required according to channel state information of a carrier sent by the second user equipment or fed-back HARQ information; in another embodiment, the network side device sends the SRS to the network side device according to the measurement result of the SRS sent by the first user device, or the first user device receives the channel state information of the carrier sent by the second user device or the HARQ information fed back. In addition, the specific manner of determining whether to perform carrier reselection is the specific implementation manner of determining whether to perform carrier reselection as in the first manner, and is not described herein again.

Moreover, the information carried by the indication information is the information carried by the second user equipment, and is not described herein again.

The indication information of the network side device may be notified through signaling such as RRC or MAC CE.

In an embodiment, if notified by the RRC signaling, the RRC signaling may include an indication IE for indicating whether the first ue needs to perform carrier reselection, such as the aforementioned carrier identifier. Further, the RRC message further includes one or more of source L2ID, destination L2ID, SLRB ID, or LCID, and is used to distinguish that the RRC message is sent from the network side device to the first user equipment.

Further, the RRC signaling optionally further includes a carrier ID, for example, the aforementioned indication information for indicating whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be carrier reselected is set to 0, and a carrier ID that does not need to be carrier reselected is set to 1, thereby indicating which carrier needs to be carrier reselected by the first user equipment.

In another embodiment, if signaled by the MAC CE, the MAC CE is used to indicate whether the first ue needs to perform carrier reselection. The MAC CE message further includes: one or more of source L2ID, destination L2ID, SLRB ID or LCID, used for distinguishing that the MAC CE message is sent to the first user equipment by the network side equipment.

Further, the MAC CE message optionally further includes a carrier ID, for example, the aforementioned indication information for indicating whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be carrier reselected is set to 0, and a carrier ID that does not need to be carrier reselected is set to 1, thereby indicating which carrier needs to be carrier reselected by the first user equipment.

Referring to fig. 4, another timing chart of a carrier determination method according to the second embodiment of the present application is shown, including:

step 401: the first user equipment sends signal information or data packets to the second user equipment.

Step 402: and the second user equipment feeds back the channel state information or the HARQ information to the network side equipment.

If the second user equipment receives the signal information of the first user equipment, determining a measurement result of the channel state information according to the signal information; or, if the second user equipment receives the data packet of the first user equipment, determining the HARQ information to be fed back according to the data packet. And then, the second user equipment sends the determined corresponding information to the network side equipment.

Step 403: and the network side equipment judges whether carrier reselection is needed or not according to the threshold.

Step 404: and the network side equipment sends the indication information to the first user equipment.

Step 405: and the first user equipment determines whether to perform carrier reselection according to the indication information.

A second part: regarding carrier selection during carrier reselection or carrier reselection.

Referring to fig. 5, a schematic flowchart of a method for determining a carrier provided in an embodiment of the present application is shown, where the method needs to select a carrier in a scenario of initial carrier selection or after determining to perform carrier reselection, and includes:

s501: the first user equipment selects at least one carrier for communicating with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

In one embodiment, at the time of carrier initial selection, the first user equipment selects at least one carrier for communication with at least one second user equipment;

in another embodiment, the first user equipment selects at least one carrier for communication with at least one second user equipment upon carrier reselection.

In specific implementation, firstly, candidate carriers are determined; at least one carrier is then selected from the candidate carriers for communication with at least one second user equipment.

Determining the candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold, and determining whether the carrier is a candidate carrier; or, the first user equipment determines the candidate carrier according to the identifier of the candidate carrier carried in the indication information.

The first method is as follows: determining the candidate carrier is performed according to a third comparison of the channel quality of the carrier with a third threshold As a result, it is determined whether the carrier is a candidate carrier。

(1) And if the first user equipment determines the candidate carrier according to the channel state information of the carrier.

When the implementation is performed according to different types of channel state information, according to a third comparison result between the channel state information of the carrier and a third threshold, it is determined that the implementation modes of the candidate carrier are different:

and after receiving the measurement result of the information by the second user equipment, the first user equipment judges. In specific implementation, if the channel state information of the carrier of the information is greater than or equal to a third threshold corresponding to each information, determining the carrier as a candidate carrier; and if the channel state information of the carrier wave of the information is less than or equal to a third threshold corresponding to each information, determining that the carrier wave is not used as a candidate carrier wave.

For example, in one embodiment, when determining a candidate carrier according to a measurement result of channel state information, if CSI is used, it is determined that the candidate carrier is available when CSI is greater than a third threshold, and otherwise, it is determined that the candidate carrier is unavailable when CSI is less than or equal to the third threshold.

In another embodiment, when determining the candidate carrier according to the multiple types of channel state information, each channel state information may be compared with a corresponding third threshold, and then the candidate carrier is determined according to the comparison result, which may be implemented as:

1) and when the comparison results of the various channel state information can be used as the candidate carrier, determining that the candidate carrier can be used, otherwise, when the comparison result of at least one channel state information is that the candidate carrier cannot be used, determining that the candidate carrier cannot be used.

2) And the minority is subject to a majority rule, namely the comparison result of the majority of the channel state information is that the majority of the channel state information can be used as a candidate carrier, the majority of the channel state information is determined to be the candidate carrier, and if the comparison result of the majority of the channel state information is that the majority of the channel state information cannot be used as the candidate carrier, the majority of the channel state information is determined to be not the candidate carrier.

3) And determining the carrier as the candidate carrier if the comparison result of one channel state information is that the carrier can be used as the candidate carrier.

4) And determining that the carrier wave can not be used as the candidate carrier wave as long as the comparison result of one information state information is that the carrier wave can not be used as the candidate carrier wave.

In specific implementation, which manner to determine the candidate carrier may be selected according to actual requirements is determined, which is not limited in the present application.

It should be noted that, for the third threshold in this embodiment, it is similar to the first threshold, and when the adopted specific information is different, the values of the third thresholds corresponding to the specific information may be different or the same, and may be determined according to actual requirements, which is not limited in this application.

and the second user equipment determines the measurement result of the channel state information and sends the measurement result to the first user equipment for judgment. In specific implementation, if the channel state information of the carrier of the information is less than or equal to a third threshold corresponding to each information, determining the carrier as a candidate carrier; and if the channel state information of the carrier wave of the information is greater than or equal to a third threshold corresponding to each piece of information, determining that the carrier wave is not used as a candidate carrier wave.

The determination method of the block error rate and the bit error rate is the same as the implementation method of determining whether to perform carrier reselection according to the block error rate and the bit error rate, and is not described herein again.

3. An SRS measured by the first user equipment;

the SRS signal is used for the first user equipment to measure, so as to obtain the channel state information, and the first user equipment determines the candidate carrier according to the measured channel state information. The specific implementation is similar to the implementation of determining candidate carriers in which the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI, and is not described herein again.

In an embodiment, the third threshold in the foregoing embodiment is similar to the determination manner of the foregoing first threshold or second threshold, for example, the third threshold may be determined in a network side configuration or a preconfigured manner, and a specific configuration manner is not described herein again.

Furthermore, the determination of the third threshold may also be related to the traffic priority. For example, if the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI, the higher the service priority, the smaller the third threshold corresponding to each information; if the channel state information comprises at least one of CR, block error rate and bit error rate; the higher the service priority is, the larger the first threshold corresponding to each piece of information is; thereby ensuring that the high priority service can have more optional candidate carriers.

And, if there are multiple candidate carriers determined, optionally, selecting at least one carrier according to the order of the channel quality of the candidate carriers. In this embodiment, for example, the candidate carriers are ranked in order of their channel quality from high to low, and then at least one carrier is selected.

In a possible implementation manner, when the channel quality information includes a plurality of parameters (e.g., the channel quality includes a plurality of information of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, CR, block error rate, and bit error rate), different weights may be further assigned to each parameter, and the summation is performed according to the weight corresponding to each parameter. And sorting according to the channel quality according to the summed weight values, thereby selecting the candidate carriers. Another possible implementation is to select candidate carriers by sorting according to the direct summation of the channel quality of each piece of information.

When the carrier is initially selected, the first user equipment can select the number of the carriers according to the service requirement of the first user equipment and the number of the candidate carriers. When the carrier is reselected, the first user equipment can select the number of carriers according to the number of carriers which need to be reselected on the carrier in combination with the number of candidate carriers and even further in combination with the service requirement of the first user equipment.

(2) If the first user equipment determines the candidate carrier according to the HARQ information fed back by the second user equipment, and during implementation, a target value is determined according to the HARQ information; and determining candidate carriers according to a fourth comparison result of the target value and a fourth threshold.

In the above embodiment, the HARQ information includes at least one of the following instruction information: ACK, NACK, DTX.

In implementation, the determination method of the target value is the same as that described above, and if the first user equipment and the second user equipment perform transmission through unicast communication, the target value is the number of designated information in HARQ information fed back by the second user equipment; or, the target value is the ratio of the number of the designated information to the number of the fed-back HARQ information; wherein the specific information is NACK and/or DTX, or the specific information is ACK.

For example, the designated information is NACK and/or the DTX, and the target value is the number of NACKs and/or the DTX in the HARQ information fed back by the second ue; when the number of the received NACKs and/or DTXs is less than or equal to a fourth threshold corresponding to the NACKs and/or DTXs, determining the carrier as a candidate carrier; when the number of the received NACKs and/or DTXs is larger than or equal to a fourth threshold corresponding to the NACKs and/or DTXs, the carrier is not determined as a candidate carrier.

Or, the designated information is ACK, the target value is a ratio of the number of ACKs to the number of fed-back HARQ information, and when the total number of received ACKs and fed-back HARQ information is greater than or equal to a fourth threshold corresponding to ACK, the carrier is determined as a candidate carrier; and when the total number of the received ACK and the fed-back HARQ information is less than or equal to a fourth threshold corresponding to the ACK, not determining the carrier as a candidate carrier.

If data transmission is performed between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is the ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or, if data transmission is performed between the first user equipment and the second user equipment through multicast communication, the target value is a ratio of the number of the designated information to the number of the second user equipment in multicast; wherein the designated information is NACK and/or DTX, or the designated information is ACK.

It should be noted that, when the HARQ information adopted by the fourth threshold is different, values of the fourth threshold corresponding to each HARQ information may be different or the same, and may be determined according to actual requirements, which is not limited in this application.

Similarly, the fourth threshold in this embodiment may be configured by the network according to a configuration selection manner or a configuration selection pre-configured manner, similar to the determination manner of the first threshold, and is not described herein again.

Furthermore, the determination of the fourth threshold may also be related to traffic priority. For example, if the specific information is NACK and/or DTX, the higher the service priority is, the larger the fourth threshold corresponding to NACK and/or DTX is; if the designated information is ACK, the higher the service priority is, the smaller the second threshold corresponding to ACK is. Thereby ensuring that the high priority service can have more optional candidate carriers.

When the carrier is initially selected, the first user equipment can select the number of the carriers according to the service requirement of the first user equipment and the number of the candidate carriers. When the carrier is reselected, the first user equipment may select the number of carriers according to the number of carrier combination candidate carriers that need to be reselected on the carrier and the service requirement of the first user equipment.

Optionally, referring to fig. 2, a timing diagram of a first method of determining a carrier according to the embodiment of the present application is shown, where, when selecting a carrier, step 203 may be implemented as the following step 203'; step 204 may be performed as step 204'; the method comprises the following steps:

Step 203': and selecting the carrier wave according to the threshold.

Step 204': and carrying out carrier selection.

The second method comprises the following steps: the first user equipment determines the candidate carrier according to the identifier of the candidate carrier carried in the indication information A wave.

The indication device is a network side device accessed by the first user device or a second user device communicated with the first user device. The indication information carries an identifier of a candidate carrier, and the candidate carrier identifier is used for enabling the first user equipment to determine the candidate carrier according to the candidate carrier identifier.

In implementation, if the indication device is a second user equipment, after the second user equipment optionally determines a candidate carrier according to channel state information of the carrier or optionally according to the determined HARQ information, the identifier of the determined candidate carrier is carried in the indication information, and then the indication information is notified to the first user equipment.

In addition, the specific determination method for determining the candidate carrier by the second user equipment according to the channel state information of the carrier or according to the determined HARQ information is the specific implementation method for determining the candidate carrier in the foregoing first embodiment, and details are not repeated here.

Similarly, the indication information of the second ue is notified through the aforementioned signaling such as SL RRC or SL MAC CE, and the specific embodiment is not described herein again.

Referring to fig. 3, a timing chart of a second method of determining a carrier according to the embodiment of the present application is shown, wherein, when selecting a carrier, step 302 may be executed as the following step 302'; step 304 may be performed as step 304'; the method comprises the following steps:

Step 302': and the second user equipment selects the carrier wave according to the threshold.

The indication information is used for indicating the candidate carrier used by the first user equipment for carrier selection.

Step 304': the first user equipment performs carrier selection.

Or, if the indication device is a network side device, such as a base station, after determining the candidate carrier, the network side device generates indication information carrying a candidate carrier identifier, and then notifies the first user equipment of the indication information, so that the first user equipment determines the candidate carrier.

In addition, the network side device may optionally determine the candidate carrier according to channel state information of the carrier sent by the second user equipment or feedback information of HARQ of the carrier, and the specific determination manner is, for example, the specific implementation manner of determining the candidate carrier in the first manner, which is not described herein again.

Similarly, the indication information for the network side device may be notified through signaling such as RRC or MAC CE, and the specific implementation is not described herein again.

Referring to fig. 4, another timing diagram of a second method of determining a carrier according to the embodiment of the present application is shown, wherein, when selecting a carrier, step 403 may be executed as following step 403'; step 405 may be implemented as step 405'; the method comprises the following steps:

Step 403': and the network side equipment selects the carrier according to the threshold.

The indication information is used for indicating candidate carriers used by the first user equipment for carrier selection.

Step 405': the first user equipment performs carrier selection.

If there are a plurality of candidate carriers, selection order information for the candidate carriers is generated on the indication device, and the selection order information is carried in the indication information.

Therefore, the indication information includes: selecting order information, the selecting order information being used for instructing the first user equipment to select information of at least one carrier according to an order of channel qualities of candidate carriers.

By the method, the first user equipment can select the carrier and determine whether the carrier needs to be reselected optionally through different implementation modes under the scene of direct communication with the second user equipment. The carrier selection is carried out by introducing the channel quality, namely the change of the channel state can be considered when the carrier selection is carried out, the reliability of service transmission between user equipment can be improved, and the problem of a carrier selection method or a single carrier selection mode in the related technology can be solved when the carrier selection is carried out according to the indication of the indication equipment.

On the basis of the foregoing embodiments, an embodiment of the present application further provides a first user equipment, as shown in fig. 6, including: a processor 601, a memory 602, and a transceiver 603;

the memory 602 for storing computer instructions;

the processor 601 is configured to execute the computer instructions in the memory 602 to perform the following processes: the first user equipment selects at least one carrier for communicating with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

Based on the same inventive concept, the embodiment of the present application further provides a first user equipment, and since the principle of the first user equipment for solving the problem is similar to the carrier determination method, the implementation of the first user equipment may refer to the implementation of the method, and repeated details are not repeated.

In fig. 6, a bus architecture (represented by bus 600), bus 600 may include any number of interconnected buses and bridges, and bus 600 links together various circuits including one or more processors, represented by general purpose processor 601, and memory, represented by memory 602. The bus 600 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 604 provides an interface between the bus 600 and the transceiver 603. The transceiver 603 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For example: the transceiver 603 receives external data from other devices. The transceiver 603 is configured to transmit the data processed by the processor 601 to other devices. Depending on the nature of the computing system, a user interface 605, such as a keypad, display, speaker, microphone, joystick, may also be provided.

The processor 601 is responsible for managing the bus 600 and general processing, such as running a general-purpose operating system as described above. While memory 602 may be used to store data used by processor 601 in performing operations.

Alternatively, the processor 601 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

The processor 601 is specifically configured to, during initial carrier selection, select at least one carrier used for communication with at least one second user equipment by the first user equipment; or,

The processor 601 is specifically configured to determine, by the first user equipment, whether carrier reselection is required according to the indication information of the indication device; or,

The processor 601 is specifically configured to determine whether carrier reselection is required according to a first comparison result between the channel state information of the carrier and a first threshold.

The processor 601 is specifically configured to determine a target value according to the HARQ information;

The processor 601 is specifically configured to determine a candidate carrier;

The processor 601 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result between the channel quality of the carrier and a third threshold; or,

The processor 601 is specifically configured to select at least one carrier according to the order of the channel quality of the candidate carriers.

Optionally, the indication information includes:

On the basis of the foregoing embodiments, an embodiment of the present application further provides an indicating apparatus, as shown in fig. 7, including: a processor 701, a memory 702, and a transceiver 703;

the memory 702 for storing computer instructions;

the processor 701 is configured to execute the following processes in the memory 702: the indication equipment sends indication information to first user equipment, wherein the indication information is used for indicating the first user equipment to select at least one carrier used for communicating with at least one second user equipment;

Based on the same inventive concept, an indication device is further provided in the embodiments of the present application, and since the principle of solving the problem by the base station is similar to the carrier determination method, the implementation of the indication device may refer to the implementation of the method, and repeated details are not repeated.

In fig. 7, a bus architecture (represented by bus 700), bus 700 may include any number of interconnected buses and bridges, bus 700 linking together various circuits including one or more processors, represented by processor 701, and memory, represented by memory 702. The bus 700 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 704 provides an interface between the bus 700 and the transceiver 703. The transceiver 703 may be one element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 701 is transmitted over a wireless medium via antenna 705, which antenna 705 receives data and transmits data to processor 701.

The processor 701 is responsible for managing the bus 700 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 705 may be used for storing data used by the processor 701 in performing operations.

Alternatively, the processor 701 may be a CPU, ASIC, FPGA or CPLD.

The processor 701 is specifically configured to, when a carrier is initially selected, send instruction information to the first user equipment by the instruction device; or,

The processor 701 is specifically configured to instruct the device to determine whether carrier reselection is required according to the channel quality of the carrier;

The processor 701 is specifically configured to determine whether carrier reselection is required according to a first comparison result between the channel state information of the carrier and a first threshold.

The processor 701 is specifically configured to determine a target value according to the HARQ information;

The processor 701 is specifically configured to determine a candidate carrier;

The processor 701 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result between the channel quality of the carrier and a third threshold.

The processor 701 is specifically configured to rank the channel qualities of the candidate carriers in an order from high to low, and generate selection order information.

Optionally, the indication information includes one of the following:

Fig. 8 is a device for determining a carrier according to an embodiment of the present application, where the device includes:

a selecting unit 801, configured to select, by a first user equipment, at least one carrier for communicating with at least one second user equipment according to channel quality of the carrier or according to indication information of an indication device;

The selecting unit 801 is specifically configured to, when a carrier is initially selected, select at least one carrier used for communication with at least one second user equipment by the first user equipment; or,

The selecting unit 801 is specifically configured to determine, by the first user equipment, whether carrier reselection is required according to the indication information of the indicating device; or,

The selecting unit 801 is specifically configured to determine whether carrier reselection is required according to a first comparison result between the channel state information of the carrier and a first threshold.

The selecting unit 801 is specifically configured to determine a target value according to the HARQ information;

The selecting unit 801 is specifically configured to determine candidate carriers;

The selecting unit 801 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result between the channel quality of the carrier and a third threshold; or,

The selecting unit 801 is specifically configured to select at least one carrier according to the order of the channel quality of the candidate carriers.

Optionally, the indication information includes:

Fig. 9 is a device for determining a carrier according to an embodiment of the present application, where the device is applied to a network side device, and the device includes:

a sending unit 901, configured to instruct a device to send indication information to a first user equipment, where the indication information is used to instruct the first user equipment to select at least one carrier for communicating with at least one second user equipment;

The sending unit 901 is specifically configured to send, by the indicating device, indication information to the first user equipment when the carrier is initially selected; or,

The sending unit 901 is specifically configured to instruct the device to determine whether carrier reselection is needed according to the channel quality of the carrier;

The sending unit 901 is specifically configured to determine whether carrier reselection is needed according to a first comparison result between the channel state information of the carrier and a first threshold.

The sending unit 901 is specifically configured to determine a target value according to the HARQ information;

determining candidate carriers;

The sending unit 901 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result between the channel quality of the carrier and a third threshold.

The sending unit 901 is specifically configured to rank the channel qualities of the candidate carriers in order from high to low, and generate selection order information.

Optionally, the indication information includes one of the following:

On the basis of the foregoing embodiments, the present application further provides a computer storage readable storage medium, where a computer program executable by a first user equipment or a pointing device is stored in the computer storage readable storage medium, and when the program is executed on the first user equipment or the pointing device, the first user equipment or the pointing device is caused to implement any of the above embodiments applied to the first user equipment or the pointing device.

The computer readable storage medium may be any available media or data storage device that can be accessed by the processor in the base station, including but not limited to magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MO), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs), etc.

For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.

It is to be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations.

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

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

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

Claims

1. A method for determining a carrier, the method comprising:

2. The method of claim 1, wherein the first user equipment selecting at least one carrier for communicating with at least one second user equipment comprises:

3. The method of claim 2, wherein determining whether carrier reselection is required comprises:

4. The method according to claim 1 or 3, wherein the channel quality of the carrier comprises: channel state information of a carrier or hybrid automatic repeat request (HARQ) information fed back by the second user equipment;

wherein the channel state information comprises at least one of the following parameters: channel state information CSI, channel quality indication CQI, rank information RI, reference signal received power RSRP, reference signal received quality RSRQ, signal to interference plus noise ratio SINR, received signal strength indication RSSI, channel occupancy CR, block error rate, bit error rate, and sounding reference signal SRS information measured by the first user equipment.

5. The method of claim 4, wherein the determining, by the first UE, whether carrier reselection is required according to the channel state information of the carrier comprises:

6. The method of claim 4, wherein the determining, by the first user equipment, whether carrier reselection is required according to the HARQ information fed back by the second user equipment comprises:

determining a target value according to the HARQ information;

7. The method of claim 6, wherein the HARQ information comprises at least one of: ACK correctly acknowledged, NACK incorrectly acknowledged, and DTX discontinuously transmitted.

8. The method according to claim 7, wherein if the first ue and the second ue transmit via unicast communication, the target value is the number of pieces of information specified in HARQ information fed back by the second ue; or,

9. The method according to claim 7, wherein if the first ue and the second ue perform data transmission through multicast or broadcast communication, the target value is a ratio of the number of designated HARQ information fed back by the second ue to the number of HARQ information fed back; or,

10. The method of claim 2, wherein the first user equipment selecting at least one carrier for communicating with at least one second user equipment comprises:

determining candidate carriers;

11. The method of claim 10, wherein determining candidate carriers comprises:

12. The method of claim 10, wherein the first user equipment selects at least one carrier from the candidate carriers, comprising:

13. The method according to claim 10, wherein the indication information comprises: selecting order information, the selecting order information being used for instructing the first user equipment to select information of at least one carrier according to an order of channel qualities of candidate carriers.

14. The method according to claim 3, wherein the indication information comprises:

15. A method for determining a carrier, the method comprising:

16. The method of claim 15, wherein the indicating device sends the indication information to the first user device, and wherein the method comprises:

17. The method of claim 16, wherein determining whether carrier reselection is required comprises:

and the indicating equipment determines whether carrier reselection is needed or not according to the channel quality of the carrier.

18. The method according to claim 15 or 17, wherein the channel quality of the carrier comprises: channel state information or HARQ information of the carrier;

19. The method of claim 18, wherein the indicating device determines whether carrier reselection is required according to the channel state information of the carrier, comprising:

20. The method of claim 18, wherein the indicating device determines whether carrier reselection is required according to the HARQ information, comprising:

determining a target value according to the HARQ information;

21. The method of claim 20, wherein the HARQ information comprises at least one of: ACK correctly acknowledged, NACK incorrectly acknowledged, and DTX discontinuously transmitted.

22. The method of claim 21, wherein the target value is the number of pieces of information specified in the HARQ information if the transmission is performed by unicast communication between the first ue and the second ue; or,

23. The method according to claim 21, wherein if the first ue and the second ue perform data transmission through multicast or broadcast communication, the target value is a ratio of a number of designated HARQ information fed back by the second ue to a number of HARQ information fed back; or,

24. The method of claim 16, wherein the indicating device sends the indication information to the first user device, comprising:

determining candidate carriers;

25. The method of claim 24, wherein determining candidate carriers comprises:

26. The method of claim 24, wherein the indicating device sends the indication information to the first user device, comprising:

27. The method of claim 26, wherein the indication information comprises: selecting order information, the selecting order information being used for instructing the first user equipment to select information of at least one carrier according to an order of channel qualities of candidate carriers.

28. The method of claim 17, wherein the indication information comprises one of the following:

29. A first user device, comprising: a processor, memory, transceiver;

wherein the processor is configured to read the computer instructions in the memory, and execute:

30. The first user equipment of claim 29, wherein the processor is specifically configured to perform:

31. The first user equipment of claim 30, wherein the processor is specifically configured to perform:

32. A pointing device, comprising: a processor, memory, transceiver;

33. The pointing device of claim 32, wherein the processor is specifically configured to perform: when the carrier is initially selected, the indicating equipment sends indicating information to the first user equipment; or,

34. The pointing device of claim 33, wherein the processor is specifically configured to perform: and the indicating equipment determines whether carrier reselection is needed or not according to the channel quality of the carrier.

35. An apparatus for determining a carrier, the apparatus comprising:

36. An apparatus for determining a carrier, the apparatus comprising:

37. A computer-readable storage medium, characterized in that the storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1-28.