CN113630128A

CN113630128A - Frequency processing method and device, terminal equipment and storage medium

Info

Publication number: CN113630128A
Application number: CN202010374522.3A
Authority: CN
Inventors: 邓云
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-11-09

Abstract

The embodiment of the application discloses a frequency processing method, a frequency processing device, terminal equipment and a storage medium. In the frequency processing method, the first frequency is a frequency at which direct communication is currently carried out between the first terminal device and the second terminal device, and the first terminal device can send indication information to the second terminal device by using the first frequency to indicate a direct communication frequency to be switched of the first terminal device, such as the second frequency. Therefore, the second terminal device can acquire the direct communication frequency to be switched of the first terminal device before the first terminal device is switched from the first frequency to the second frequency, so that the second terminal device is favorable for switching the current direct communication frequency from the first frequency to the second frequency, and the continuity of the direct communication service between the two terminal devices is maintained.

Description

Frequency processing method and device, terminal equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a frequency processing method and apparatus, a terminal device, and a storage medium.

Background

With the increasing of wireless services, a service providing method centered on a base station cannot meet the service requirements of a large number of users in different environments, and therefore, a terminal direct Communication (SC) technology is introduced into a New generation of 5G (New Radio, NR) Communication. In the direct communication technique, direct communication is possible between a terminal device and the terminal device, and the terminal device may directly obtain resources for direct communication from a base station or select resources for direct communication from a pre-configured resource pool. Although the resources that can be used for direct communication may comprise a plurality of frequencies, in the current protocol version only direct communication on one frequency is supported between the terminal devices at the same time. Therefore, if the operating frequency needs to be changed due to a change in the location of a terminal device or a decrease in communication quality, the terminal device needs to switch from one frequency to another frequency, which may cause interruption of an ongoing direct communication service.

Therefore, how to guarantee the service continuity of the direct communication in the frequency switching scenario becomes an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a frequency processing method, a frequency processing device, terminal equipment and a storage medium, which are beneficial to maintaining the continuity of direct communication service.

In a first aspect, an embodiment of the present application provides a frequency processing method, where the method includes: the first terminal equipment determines a second frequency, wherein the second frequency is a direct communication frequency to be switched by the first terminal equipment; the first terminal equipment sends indication information to the second terminal equipment by using the first frequency, the indication information is used for indicating that the first terminal equipment is to be switched to the second frequency, and the first frequency is the frequency of the current direct communication between the first terminal equipment and the second terminal equipment.

In a second aspect, an embodiment of the present application provides a frequency processing apparatus, including:

the determining unit is used for determining a second frequency by the first terminal equipment, wherein the second frequency is a direct communication frequency to be switched by the first terminal equipment;

the sending unit is used for the first terminal equipment to send indication information to the second terminal equipment by using the first frequency, the indication information is used for indicating the first terminal equipment to be switched to the second frequency, and the first frequency is the frequency of the current direct communication between the first terminal equipment and the second terminal equipment.

In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes:

a memory for storing a computer program;

a processor invoking a computer program for performing the following operations:

the first terminal equipment determines a second frequency, wherein the second frequency is a direct communication frequency to be switched by the first terminal equipment; the first terminal equipment sends indication information to the second terminal equipment by using the first frequency, the indication information is used for indicating that the first terminal equipment is to be switched to the second frequency, and the first frequency is the frequency of the current direct communication between the first terminal equipment and the second terminal equipment.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions for the user equipment, which includes a program for executing the method according to any one of the first aspect.

In the embodiment of the application, the first terminal device determines a second frequency, the second frequency is a direct communication frequency to be switched by the first terminal device, then the first terminal device sends a message that the first terminal device is to be switched from the first frequency to the second terminal device in the form of indication information by using the first frequency, and the first frequency is a frequency for currently carrying out direct communication between the first terminal device and the second terminal device. According to the method, the second terminal device knows that the first terminal device is to be switched from the first frequency to the second frequency, so that the second terminal device is favorable for being switched from the first frequency to the second frequency before the first terminal device is switched from the first frequency to the second frequency, and the continuity of direct communication service between the first terminal device and the second terminal device can be kept when the first terminal device is switched from the first frequency to the second frequency.

Drawings

Fig. 1 is a schematic system structure diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a frequency processing method according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of another frequency processing method according to an embodiment of the present disclosure;

fig. 4 is a schematic flowchart of determining a second frequency according to an inter-frequency cell according to an embodiment of the present application;

fig. 5 is a schematic flowchart of another process for determining a second frequency according to an inter-frequency cell according to an embodiment of the present application;

fig. 6 is a schematic flowchart of another frequency processing method according to an embodiment of the present application;

fig. 7 is a schematic flowchart of another frequency processing method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a frequency processing apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

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

The technical scheme provided by the application can be applied to various communication systems, such as a global system for mobile communication, an LTE frequency division duplex system, an LTE time division duplex system, a universal mobile communication system, a new wireless system, a communication system of subsequent evolution and the like.

The direct Communication (SC) technology refers to a device-to-device Communication technology, and is a novel technology that allows terminal devices to directly communicate with each other by multiplexing cell resources under the control of a system.

Based on the direct communication technology, Vehicle-to-event (V2X) service can be developed. V2X means that the Vehicle can be interconnected with the surrounding environment, the surrounding environment includes Vehicle, Infrastructure, People, cloud, the Infrastructure includes traffic lights, speed measuring instrument, etc., the cloud is cloud server, i.e. V2X includes Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), Vehicle to People (V2P), Vehicle to cloud (V2N).

Based on the direct communication technology, a communication system suitable for developing the V2X service is shown in fig. 1, and the communication system may include, but is not limited to, one network device, one first terminal device, and two second terminal devices, the number and form of the devices shown in fig. 1 are used for example and do not constitute a limitation to the embodiments of the present application, and in practical applications, two or more network devices, two or more first terminal devices, and one or more second terminal devices may be included. The communication system shown in fig. 1 is illustrated by taking a network device 101, a first terminal device 102, and two second terminal devices 103 as an example, the network device 101 in fig. 1 may provide network services for the first terminal device and the second terminal devices, and the first terminal device 102 and the second terminal device 103 perform direct communication and perform V2X service. The first terminal device may transmit V2X data to the second terminal device, which may also transmit V2X data to the first terminal device. In the embodiments of the present application, data transmission from a first terminal device to a second terminal device is taken as an example for description.

In this application, a terminal device may also be referred to as a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a user agent, or a user equipment. The terminal device in the embodiment of the application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a traffic light, a velocimeter, a terminal device mounted on a vehicle, a cloud server, a wireless terminal in a self driving (self driving), and the like.

In this application, the network device is a physical entity connected to a network, and the network device may be a base station, which may be a 5G base station (gbb), and the network device may also be a network device in a subsequent evolved communication system.

In the communication system shown in fig. 1, a network device is used as a base station, a first terminal device is a terminal device mounted on a vehicle a, the number of second terminal devices is two, and the second terminal devices are terminal devices mounted on a vehicle B and a vehicle C. When the first terminal device and the second terminal device perform direct communication and perform a V2X service, if the first terminal device changes or the communication quality between the first terminal device and the second terminal device decreases, the first terminal device needs to switch the frequency of performing direct communication with the second terminal device, which may cause interruption of direct communication between the first terminal device and the second terminal device.

In order to solve the above problem, an embodiment of the present application provides a frequency processing method, in which a first terminal device determines a direct communication frequency to be switched, that is, a second frequency, and then sends an indication message to a second terminal device by using a frequency at which direct communication is currently performed with the second terminal device, that is, a first frequency, to indicate the first terminal device to be switched to the second frequency, so that the second terminal device knows that the second terminal device will switch from the first frequency, and further, if the second terminal device also switches from the current direct communication frequency to the second frequency, continuity of a direct communication service between the first terminal device and the second terminal device can be maintained. The direct communication frequency in the embodiment of the present application may be a V2X frequency.

To facilitate an understanding of the embodiments disclosed herein, some concepts related to the embodiments of the present application will be first explained. The description of these concepts includes, but is not limited to, the following.

In the NR direct communication, the resource source mode when the first terminal device and the second terminal device develop services includes a resource scheduling mode and an automatic resource selection mode.

The Resource scheduling mode refers to that when the first terminal device is in Radio Resource Control (RRC) connection with a network device in a serving cell, the network device schedules resources for transmitting direct communication data for the first terminal device through RRC signaling or Downlink Control Information (DCI), and the network device is a base station. Therefore, the first terminal device uses the resource scheduled by the network device to perform direct communication with the second terminal device.

The automatic resource selection mode is that the first terminal device automatically selects resources for transmitting data to the second terminal device from a resource pool configured by a network or a pre-configured resource pool. The resource pool configured by the network is a resource pool which is configured for the first terminal equipment by the network equipment in the serving cell through system information or RRC signaling and is used for transmitting data when the first terminal equipment is in the network coverage range of the serving cell; the preconfigured resource pool may be preset in the first terminal device, for example, preset in a SIM card of the first terminal device, or the preconfigured resource pool may be a resource pool configured by the network device for the first terminal device through signaling when the first terminal device is within a network coverage of the serving cell, which resource pool can be used for transmitting data to the second terminal device when the first terminal device is not within the network coverage. Therefore, if the first terminal device is not within the network coverage of the serving cell, the first terminal device may select a resource for transmitting data to the first terminal device from a pre-configured resource pool.

When the first terminal device and the second terminal device carry out direct communication, the direct communication frequency to be switched refers to one or more direct communication frequencies to which the first terminal device needs to be switched from the current direct communication frequency, and the direct communication frequency to be switched can be one or more direct communication frequencies configured for a cell to be switched. The first terminal device can directly communicate with one terminal device or a plurality of second terminal devices, and the frequency to be switched is one or more direct communication frequencies configured for the cell to be switched.

The cell to be switched is a target cell to which the first terminal device needs to be switched from the serving cell, that is, the first terminal device is switched from the current serving cell to the cell to be switched, and direct communication is continuously carried out on the direct communication frequency configured in the cell to be switched. And if the frequency of the cell to be switched is different from the frequency of the current service cell, the cell to be switched is a different frequency cell.

Based on the above description, an embodiment of the present application proposes a frequency processing method as shown in fig. 2, which may include S201-S202:

s201: the first terminal device determines the second frequency.

The second frequency is a direct communication frequency to be switched by the first terminal equipment. When the first terminal equipment determines or pre-judges that frequency switching is needed, determining a direct communication frequency to be switched, namely a second frequency.

S202: the first terminal equipment sends the indication information to the second terminal equipment by using the first frequency.

The indication information is used for indicating that the first terminal device is to be switched to a second frequency, and the first frequency is a frequency of currently performing direct communication between the first terminal device and the second terminal device. The first terminal device informs the second terminal device of the second frequency to be switched by the first terminal device in a mode of indicating information, so that the second terminal device can acquire the information and can determine whether the second terminal device needs to switch the current direct communication frequency to the second frequency. After the first terminal device determines the second frequency, the first terminal device sends the indication information to the second terminal device by using the frequency of the current direct communication between the first terminal device and the second terminal device, so that the situation that the second terminal device cannot receive the indication information of the direct communication frequency to be switched by the first terminal device due to the fact that the second terminal device continues to receive signals at the first frequency after the first terminal device performs cell switching can be avoided.

In this embodiment of the present application, a first terminal device determines a direct communication frequency to be switched, that is, a second frequency, and sends an indication message to a second terminal device by using a current direct communication frequency to inform the second terminal device that the first terminal device is to be switched from the first frequency to the second frequency, so that if the second terminal device also switches the current direct communication frequency to the second frequency, the first terminal device can still continue to perform direct communication with the second terminal device after switching from the current direct communication frequency.

If a first terminal device and a second terminal device perform direct communication, the first terminal device is in a network coverage area of a serving cell, the first terminal device has already established an RRC connection with a network device in the serving cell, the network device schedules a resource for performing direct communication with the second terminal device for the first terminal device, and the first terminal device transmits data to the second terminal device in a unicast manner, that is, when each data packet sent by the first terminal device can only be transmitted to one second terminal device, an embodiment of the present application provides a frequency processing method as shown in fig. 3, where the method may include S301 to S303:

s301: and the first terminal equipment determines the second frequency according to the target cell or the pilot frequency cell.

The target cell may be the same or different in frequency from the current serving cell of the first terminal, the same frequency is called an intra-frequency cell, and the different frequency is called an inter-frequency cell. When the target cell is a pilot frequency cell, the target cell is configured with a direct communication frequency generally different from the first frequency. When the target cell is an intra-frequency cell, the direct communication frequency configured by the target cell may be the same as or different from the first frequency. In the process of carrying out direct communication between the first terminal device and the second terminal device, in order to guarantee the normality of communication, the first terminal device needs to measure the signal quality of a serving cell and a neighboring cell so as to obtain a signal quality measurement result.

In one implementation, a first terminal device receives a handover instruction, where the handover instruction is used to indicate that the first terminal device needs to be handed over to a target cell; and the first terminal equipment determines the second frequency according to the target cell. Wherein the determining, by the first terminal device, the second frequency according to the target cell includes: and the first terminal equipment determines the second frequency according to the frequency of the target cell or the frequency of the direct communication configured by the target cell.

The first terminal device generates a measurement report according to the measurement result and reports the measurement report to the network device of the service cell, the network device is a source base station, the source base station provides network service for the first terminal device, the source base station takes a neighboring cell which can support the first terminal device to carry out direct communication in the measurement report as a target cell of the first terminal device, and informs the first terminal device in the form of a switching instruction to switch the first terminal device from the current service cell to the target cell. Therefore, the first terminal device receives the handover command sent by the network device, and determines the second frequency according to the target cell indicated in the handover command. Only the scenario that the second frequency is different from the first frequency is considered here, and this way, the first terminal device can determine that the first terminal device will be switched from the current serving cell to the target cell, and then determine the second frequency according to the target cell, which can increase the reliability of determining the second frequency.

In another implementation manner, the first terminal device determines to be switched to the inter-frequency cell according to the reported measurement report; and the first terminal equipment determines the second frequency according to the pilot frequency cell.

The measurement report is a measurement report corresponding to the measurement task in which T312 is arranged, that is, if one measurement task is in which T312 is arranged, the measurement report generated by the measurement task is a measurement report corresponding to the measurement task in which T312 is arranged. When the network device configures the measurement task, the reporting condition corresponding to the measurement task includes T312, so that the first terminal device can determine that the measurement task corresponds to T312 when executing the measurement task, the first terminal device generates a measurement report from the measurement result of the measurement task and reports the measurement report to the network device when determining that the measurement reporting condition is satisfied, and the first terminal device starts T312 when reporting the measurement report. Before T312 overtime, the serving cell determines a cell to be switched of the first terminal device according to the measurement result in the measurement report, and informs the first terminal device in a switching instruction mode; if T312 is overtime, the first terminal device has not received the handover instruction sent by the serving cell, and then triggers an RRC reestablishment procedure, in which the first terminal device selects a suitable cell to perform RRC reestablishment, and the first terminal device may reestablish an RRC connection with the source serving cell, or reestablish an RRC connection with a cell other than the source serving cell. Therefore, when the first terminal device reports a measurement report configured with T312, the first terminal device pre-judges that the first terminal device is to be switched from the current direct communication frequency, determines a cell in the reported measurement report as a pilot frequency cell, and determines the second frequency according to the measurement report.

In this way, when a measurement report configured with T312 is reported by a first terminal device, it is pre-determined that the first terminal device is to be switched from a current direct communication frequency, and a second frequency is determined according to a pilot frequency cell, so that the first terminal device determines a frequency to be switched before determining to switch from the current direct communication frequency, and can let a second terminal device know in advance that the first terminal device is to be switched from the current direct communication frequency, and if the second terminal device wants to continue to perform direct communication with the first terminal device, it is also necessary to switch from the current direct communication frequency to the frequency to be switched of the first terminal device, thereby increasing the probability of continuing to perform direct communication between the first terminal device and the second terminal device.

Optionally, the first terminal device determines to switch to the pilot frequency cell according to the reported measurement report; and the first terminal equipment determines the second frequency according to the pilot frequency cell, and the signal quality of the adjacent cell in the measurement report is superior to that of the current service cell. And the first terminal equipment generates a measurement report according to the measurement result and reports the measurement report to the serving cell. When the frequency of the neighboring cell meeting the reporting condition in the measurement report reported by the first terminal device to the serving cell is different from the frequency of the current serving cell and the signal quality of the cell is better than that of the current serving cell, the first terminal device pre-judges to switch from the current direct communication frequency. Therefore, the first terminal device determines the cell in the measurement report as an inter-frequency cell, and then determines the second frequency according to the inter-frequency cell.

In this way, the first terminal device also pre-judges that the first terminal device is to be switched from the current direct communication frequency according to the measurement report, and therefore, before the switching from the current direct communication frequency is determined, the direct communication frequency to be switched is determined, so that the second terminal device can know in advance that the first terminal device is to be switched from the current direct communication frequency to the direct communication frequency to be switched.

Regarding the first terminal device determining the second frequency according to the target cell or the inter-frequency cell, there are the following implementation manners:

in one implementation manner, the first terminal device determines, as the second frequency, at least one frequency used for direct communication in the direct communication frequencies configured in the target cell or the inter-frequency cell according to each frequency, supported by the first terminal device, of the direct communication frequencies configured in the target cell or the inter-frequency cell.

In another implementation manner, the method for the first terminal device to determine the second frequency according to the target cell or the inter-frequency cell is as shown in S401 to S403:

s401: the first terminal device sends the first set of candidate frequencies to the second terminal device.

The first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell. The first terminal device sends a first candidate frequency set to the second terminal device, so that the second terminal device selects a direct communication frequency supported by the second terminal device from the first candidate frequency set.

S402: the first terminal device receives the second set of candidate frequencies.

The second candidate frequency set is a set of one or more direct communication frequencies selected by the second terminal device from the first candidate frequency set. After receiving the first candidate frequency set from the first terminal device, the second terminal device selects one or more direct communication frequencies supported by the second terminal device from the first candidate frequency set, forms the direct communication frequencies into a second candidate frequency set, and sends the second candidate frequency set to the first terminal device. The frequencies in the second candidate frequency set are thus both a fraction of the direct communication frequencies to be switched by the first terminal device and the direct communication frequencies supported by the second terminal device.

In one implementation, there is no direct communication frequency that can be supported by the second terminal device in the first candidate frequency set, so the second terminal device sends rejection information to the first terminal device, where the rejection information is used to indicate that the second terminal device does not support any frequency in the first candidate frequency set as a direct communication frequency. Therefore, if the first terminal device switches from the current direct communication frequency to any frequency in the first candidate frequency set, the first terminal device cannot continue to perform direct communication with the second terminal device, and the direct communication performed by the first terminal device and the second terminal device is interrupted.

S403: the first terminal device selects one or more frequencies from the second set of candidate frequencies as the second frequency.

When the number of the second terminal devices is one, the first terminal device selects one frequency from the second candidate frequency set as a second frequency; when the number of the second terminal devices is multiple, the first terminal device selects multiple frequencies from the second candidate frequency set as the second frequencies. The second frequency is a frequency of direct communication selected by the second terminal device from the first candidate frequency set, and if the second terminal device also switches the current frequency of direct communication to the second frequency, the probability that the first terminal device and the second terminal device continue to conduct direct communication can be increased.

In another implementation manner, the method for the first terminal device to determine the second frequency according to the target cell or the inter-frequency cell is as shown in S501-S503:

s501: the first terminal device receives the third set of candidate frequencies.

The third candidate frequency set is a set of one or more candidate direct communication frequencies supported by the second terminal device, that is, each frequency in the third candidate frequency set is a frequency supported by the second terminal device for direct communication. The first terminal device obtains the third candidate frequency set through the PC5 RRC signaling, that is, the first terminal device receives the third candidate frequency set sent by the second terminal device through the PC5 RRC signaling.

S502: the first terminal device acquires one or more frequencies common between the first candidate frequency set and the third candidate frequency set as a fourth candidate frequency set.

The first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell, that is, each frequency in the first candidate frequency set is a candidate frequency to be switched of the first terminal device. The first terminal device compares the first candidate frequency set with the third candidate frequency set to obtain one or more frequencies shared between the first candidate frequency set and the third candidate frequency set, and uses the one or more frequencies as a fourth candidate frequency set, so that the frequencies in the fourth candidate frequency set are both the direct communication frequencies switchable by the first terminal device and the direct communication frequencies supported by the second terminal device.

S503: the first terminal device selects one or more frequencies from the fourth set of candidate frequencies as the second frequency.

And selecting one or more frequencies from the fourth candidate frequency set as a second frequency, so that the frequency to be switched of the first terminal equipment is the direct communication frequency supported by the second terminal equipment. Therefore, if the first terminal device switches the current direct communication frequency to the second frequency, the first terminal device can continue to perform direct communication with the second terminal device, and the probability that the first terminal device continues to perform direct communication with the second terminal device can also be increased.

S302: the first terminal equipment sends the indication information to the second terminal equipment by using the first frequency.

The first frequency is a frequency at which direct communication is currently carried out between the first terminal device and the second terminal device. The method comprises the steps that a first terminal device transmits data to a second terminal device by using a first Frequency, and if the first terminal device and a network device in a service cell communicate in a Frequency division multiplexing (FDD) mode, the first Frequency is an uplink Frequency between the first terminal device and the network device; if the first terminal device and the network device in the serving cell communicate by using Time-division Duplex (TDD), and the uplink frequency and the downlink frequency between the first terminal device and the network device are the same and are the same communication frequency, the first frequency is a frequency when the first terminal device and the network device communicate.

The first terminal equipment sends indication information to the second terminal equipment by utilizing the first frequency through PC5 RRC signaling or media access layer control information element, wherein the indication information is used for indicating the second terminal equipment that the first terminal equipment is to be switched to the second frequency. The existing PC5 RRC signaling or media access layer control information element does not support the first terminal device to send indication information to the second terminal device indicating that the first terminal device is to be switched to the second frequency, so the scheme enhances the existing PC5 RRC signaling or media access layer control information element.

In an implementation manner, after receiving a handover instruction sent by a serving cell, a first terminal device may continue to use a resource configured by the serving cell for the first terminal device and used for performing direct communication with a second terminal device, or use a transmission resource in an abnormal resource Pool (Exceptional Pool) configured by the serving cell, or use a transmission resource reserved by the first terminal device, within a preset time period, so as to complete indicating a direct communication frequency to be handed over to the second terminal device. Therefore, when the first terminal device determines that the switching from the first frequency is to be performed, the first terminal device can use the first frequency to send indication information to the second terminal device, and the second terminal device is informed that the first terminal device is to be switched from the first frequency to the second frequency.

In an implementation manner, the first terminal device pre-determines to switch from the first frequency according to the reported measurement report, and at this time, the first terminal device may also send indication information to the second terminal device by using the first frequency, and timely notify the second terminal device that the first terminal device will switch from the first frequency to the second frequency.

S303: the first terminal device switches from the first frequency to the second frequency.

The first terminal device switches from the first frequency to a second frequency to conduct direct communication on the second frequency. If the second terminal device switches the current direct communication frequency to the second frequency after receiving the indication information sent by the first terminal device, the first terminal device can still carry out direct communication with the second terminal device after the first terminal device is switched from the first frequency to the second frequency, so that the continuity of carrying out direct communication service between the first terminal device and the second terminal device is increased.

Optionally, when the first terminal device receives the acknowledgement message from the second terminal device, switching from the first frequency to the second frequency is performed to conduct direct communication on the second frequency. When the first terminal device receives the confirmation message sent by the second terminal device, the second terminal device is indicated to confirm that the second terminal device is switched from the current direct communication frequency to the second frequency, and then the first terminal device is switched from the first frequency to the second frequency, so that the first terminal device and the second terminal device can continue to carry out direct communication services after the first terminal device carries out frequency switching.

In this embodiment of the present application, a first terminal device determines, according to a reported measurement report, that a handover to a pilot frequency cell is required, and then determines, according to the pilot frequency cell, a second frequency, where the second frequency is one or more of direct communication frequencies configured in the pilot frequency cell, or the second frequency is both a frequency to be handed over of the first terminal device and a direct communication frequency supported by a second terminal device, so that after sending, to the second terminal device, indication information indicating that the first terminal device is to be handed over to the second frequency, the second terminal device switches from the first frequency to the second frequency, and can still maintain continuity of direct communication services between the first terminal device and the second terminal device.

In the above embodiment, the first terminal device and the second terminal device perform direct communication in a unicast manner, and the network device allocates resources for performing direct communication with the second terminal device to the first terminal device in a resource scheduling manner. The first terminal device may also not establish an RRC connection with the network device, and when the first terminal device selects one or more resources for performing direct communication with the second terminal device from a resource pool configured by the network device or a pre-configured resource pool, a frequency processing method as shown in fig. 6 is proposed, where the method includes: S601-S604.

S601: and the first terminal equipment determines to reselect the pilot frequency cell according to the measurement result.

The measurement result is obtained by the first terminal device performing signal quality measurement on the serving cell and the neighboring cell when the current serving cell and the second terminal device perform direct communication, and the measurement result includes the signal quality of the serving cell and the signal quality of the neighboring cell. If the signal quality of the neighboring cell in the measurement result is greater than the first threshold and the frequency of the neighboring cell is different from the frequency of the serving cell, the first terminal device determines the neighboring cell as the inter-frequency cell, where the first threshold is set in advance by the first terminal device, and if the network device can configure the exact value of the threshold of the first terminal.

When the signal quality of the neighboring cell in the measurement result is greater than the threshold value, or the signal quality of the neighboring cell is greater than the signal quality of the current serving cell, the first terminal device triggers cell reselection, the cell reselection means that the first terminal device reselects a cell to provide a service for the first terminal device, and the first terminal device expects to continue to perform direct communication with the second terminal device in the reselected cell. The first threshold may be less than the threshold or the first threshold may be less than the signal quality of the serving cell. For example, the first threshold is smaller than the threshold by 3db, that is, when the signal quality of the neighboring cell is smaller than 3db of the threshold, the first terminal device prejudges that the first terminal device will perform cell reselection, and at this time, it is determined that the inter-frequency cell needs to be reselected. The method can enable the first terminal device to inform the second terminal device that the first terminal device is to be switched from the current direct communication frequency by using the resource of the current service cell before determining to perform cell reselection. By the method, the situation that the first terminal device cannot find a proper resource to send the indication information indicating that the first terminal device is to be switched to the second frequency to the second terminal device after the first terminal device performs cell reselection can be avoided.

S602: and the first terminal equipment determines the second frequency according to the pilot frequency cell.

For the specific method for the first terminal device to determine the second frequency according to the inter-frequency cell, reference may be made to the method for the first terminal device to determine the second frequency in S301, which is not described herein again.

S603: the first terminal equipment sends the indication information to the second terminal equipment by using the first frequency.

S604: the first terminal device switches from the first frequency to the second frequency.

S603 to S604 in this embodiment may specifically refer to the execution process of S302 to S303 in the above embodiment, and details of this embodiment of the present invention are not described again.

In the embodiment of the present application, when a first terminal device performs direct communication with a second terminal device by using resources in a resource pool configured in advance by a network device, if signal quality of a neighboring cell in a measurement result is greater than a first threshold, it is determined that the first terminal device is to trigger cell reselection, so that before cell reselection, the neighboring cell in the measurement result is determined as an inter-frequency cell, a second frequency is determined according to the inter-frequency cell, and the second frequency is notified to the second terminal device in an indication information manner, so that it is avoided that after cell reselection is performed by the first terminal device, an appropriate resource cannot be found to send indication information indicating that the first terminal device is to be switched to the second frequency to the second terminal device. And simultaneously, after the first terminal equipment sends the indication information and receives a switching instruction sent by the serving cell, the first terminal equipment is switched from the first frequency to the second frequency so as to carry out direct communication with the second terminal equipment on the second frequency.

In the above two embodiments, when the first terminal device and the second terminal device perform direct communication in a unicast manner, that is, each data packet sent by the first terminal device may be transmitted to a group of second terminal devices that establish direct communication with the first terminal device, or each data packet sent by the first terminal device may be transmitted to each second terminal device that establishes direct communication with the first terminal device, a frequency processing method as shown in fig. 7 is proposed, where the method includes: S701-S703.

S701: the first terminal device determines the second frequency.

If the location information of the first terminal device changes, or the channel occupancy on the first frequency is greater than a second threshold, or the signal power on the resource pool corresponding to the first frequency is greater than a third threshold, the first terminal device determines a second frequency from one or more direct communication frequencies configured in the current serving cell, where the second frequency is different from the first frequency, and the first frequency is a frequency at which direct communication is currently carried out between the first terminal device and the second terminal device.

When the position information of the first terminal equipment is changed, the first terminal equipment determines that switching from a first frequency is needed; or when the channel occupancy on the first frequency is greater than the second threshold, the communication quality of the first terminal device for performing direct communication with the second terminal device by using the first frequency is greatly affected, so that the first terminal device also determines that switching from the first frequency is required; or the signal power on the resource pool corresponding to the first frequency is greater than the third threshold, which also indicates that the signal quality of the direct communication with the second terminal device on the first frequency is poor, and the first terminal device determines that the handover from the first frequency is required. The signal power on the resource pool corresponding to the first frequency is measured in the resource pool by the first terminal device.

When the above condition is satisfied, the first terminal device determines that the handover from the first frequency is required, and then determines the second frequency from one or more direct communication frequencies configured in the current serving cell. The direct communication frequency configured by the current serving cell includes a direct communication frequency configured by the network device to which the serving cell belongs for the first terminal device in a dedicated signaling manner, and also includes a direct communication frequency configured by the network device for the first terminal device through a system message.

S702: the first terminal equipment sends the indication information to the second terminal equipment by using the first frequency.

When the first terminal device and the second terminal device perform data transmission in a multicast mode, the first terminal device sends indication information to the second terminal device by using the first frequency through a PC5 RRC signaling or a media access layer control cell, where the indication information is used to indicate to the second terminal device that the first terminal device is to be switched to the second frequency, and the PC5 RRC signaling or the media access layer control cell may be enhanced to support the indication information.

When the first terminal equipment and the second terminal equipment perform data transmission in a broadcasting mode, the first terminal equipment sends indication information to the second terminal equipment by using a first frequency through a media access layer control cell, the indication information is used for indicating the second terminal equipment that the first terminal equipment is to be switched to a second frequency, and the media access layer control cell can be enhanced to support the indication information.

S703: the first terminal device switches from the first frequency to the second frequency.

S703 in this embodiment may specifically refer to the execution process of S303 in the above embodiment, and details of the embodiment of the present invention are not described again.

In this embodiment of the present application, a first terminal device transmits the same data to a plurality of second terminal devices, and when the first terminal device determines that it needs to switch from a first frequency, the first terminal device directly determines a second frequency from one or more direct communication frequencies configured in a current serving cell, and informs the first terminal device in a manner of indication information that the second terminal device will switch from the first frequency to the second frequency, or after the first terminal device switches from the first frequency, the second terminal device switches the current direct communication frequency to the second frequency, so that after the first terminal device switches the frequency, direct communication with the first terminal device continues to be performed.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a frequency processing apparatus according to an embodiment of the present invention, where the frequency processing apparatus is used in a first terminal device, and the frequency processing apparatus 80 may include:

a determining unit 801, configured to determine a second frequency, where the second frequency is a direct communication frequency to be switched by the first terminal device;

a sending unit 802, configured to send, by using a first frequency, indication information to a second terminal device, where the indication information is used to indicate that the first terminal device is to be switched to a second frequency, and the first frequency is a frequency at which direct communication is currently performed between the first terminal device and the second terminal device.

In one implementation, the frequency processing apparatus 80 further includes:

a receiving unit 803, configured to receive a handover instruction, where the handover instruction is used to instruct a first terminal device to handover to a target cell; the determining unit 801 is further configured to determine a second frequency according to the target cell.

In one implementation, the determining unit 801 is further configured to determine the second frequency according to the frequency of the target cell or the direct communication frequency configured by the target cell.

In an implementation manner, the determining unit 801 is further configured to determine that handover to a different frequency cell is required according to a reported measurement report; the determining unit 801 is further configured to determine the second frequency according to the inter-frequency cell.

In one implementation, the measurement report is a measurement report corresponding to the measurement task configured with T312.

In one implementation, the signal quality of the neighbor cell in the measurement report is better than the signal quality of the current serving cell.

In an implementation manner, the determining unit 801 is further configured to determine, according to a measurement result, that a pilot frequency cell needs to be reselected, where a signal quality of the pilot frequency cell in the measurement result is greater than a first threshold; the determining unit 801 is further configured to determine the second frequency according to the inter-frequency cell.

In one implementation, the second frequency is at least one frequency configured in the target cell or the inter-frequency cell for direct communication.

In an implementation manner, the sending unit 802 is further configured to send a first candidate frequency set to the second terminal device, where the first candidate frequency set is a candidate frequency set formed by one or more candidate direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell; a receiving unit 803, further configured to receive a second candidate frequency set, where the second candidate frequency set is a set of one or more direct communication frequencies selected by the second terminal device from the first candidate frequency set; a selecting unit 804, configured to select one or more frequencies from the second candidate frequency set as the second frequency.

In an implementation manner, the receiving unit 803 is further configured to receive a third candidate frequency set, where the third candidate frequency set is a set of one or more candidate direct communication frequencies supported by the second terminal device; an obtaining unit 805, configured to obtain one or more frequencies shared between a first candidate frequency set and a third candidate frequency set as a fourth candidate frequency set, where the first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell; the selecting unit 804 is further configured to select one or more frequencies from the third candidate frequency set as the second frequencies.

In an implementation manner, the determining unit 801 is further configured to determine a second frequency from one or more direct communication frequencies configured in the current serving cell if the location information of the first terminal device changes, or the channel occupancy on the first frequency is greater than a second threshold, or the signal power on the resource pool corresponding to the first frequency is greater than a third threshold, where the second frequency is different from the first frequency, and the first frequency is a frequency at which direct communication is currently performed between the first terminal device and the second terminal device.

In one implementation, the indication information is carried by PC5 Radio Resource Control (RRC) signaling or medium access layer control information element.

In one implementation, the frequency processing apparatus 80 further includes: a switching unit 806, configured to switch the first terminal device from the first frequency to the second frequency to perform direct communication on the second frequency.

In one implementation, the switching unit 806 is further configured to switch from the first frequency to the second frequency to conduct the direct communication on the second frequency when the first terminal device receives the confirmation message from the second terminal device.

The embodiments of the present invention and the embodiments of the methods shown in fig. 2 to 7 are based on the same concept, and the technical effects thereof are also the same, and for the specific principle, reference is made to the description of the embodiments shown in fig. 2 to 7, which is not repeated herein.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 90 described in the embodiment of the present application includes: the processor 901, the memory 902, the processor 901 and the memory 902 are connected by one or more communication buses.

The Processor 901 may be a Central Processing Unit (CPU), and may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The processor 901 is configured to support the user equipment to perform the corresponding functions of the first terminal device in the methods described in fig. 2 to 7.

The memory 902 may include a read-only memory and a random access memory, and provides computer programs and data to the processor 901. A portion of the memory 902 may also include non-volatile random access memory. When the processor 901 calls the computer program, it is configured to:

determining a second frequency, wherein the second frequency is a direct communication frequency to be switched of the first terminal equipment;

and sending indication information to the second terminal equipment by using the first frequency, wherein the indication information is used for indicating that the first terminal equipment is to be switched to the second frequency, and the first frequency is the frequency of the current direct communication between the first terminal equipment and the second terminal equipment.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency is: the processor 901 receives a handover instruction, where the handover instruction is used to instruct a first terminal device to handover to a target cell; processor 901 determines a second frequency from the target cell.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency according to the target cell is as follows: the processor 901 determines the second frequency according to the frequency of the target cell or the direct communication frequency configured by the target cell.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency is: the processor 901 determines that the handover to the pilot frequency cell is required according to the reported measurement report; processor 901 determines a second frequency from the inter-frequency cell.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency is: the processor 901 determines that a pilot frequency cell needs to be reselected according to the measurement result, wherein the signal quality of the pilot frequency cell in the measurement result is greater than a first threshold value; processor 901 determines a second frequency from the inter-frequency cell.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency according to the target cell or the inter-frequency cell is as follows: processor 901 sends a first candidate frequency set to the second terminal device, where the first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell; the processor 901 receives a second candidate frequency set, which is a set of one or more direct communication frequencies selected by the second terminal device from the first candidate frequency set; processor 901 selects one or more frequencies from the second set of candidate frequencies as the second frequency.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency according to the target cell or the inter-frequency cell is as follows: the processor 901 receives a third candidate frequency set, which is a set of one or more candidate direct communication frequencies supported by the second terminal device; the processor 901 obtains one or more frequencies shared between a first candidate frequency set and a third candidate frequency set as a fourth candidate frequency set, where the first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell; processor 901 selects one or more frequencies from the third set of candidate frequencies as the second frequency.

In one implementation, the specific implementation manner of the processor 901 determining the second frequency is:

if the location information of the first terminal device changes, or the channel occupancy on the first frequency is greater than the second threshold, or the signal power on the resource pool corresponding to the first frequency is greater than the third threshold, the processor 901 determines a second frequency from one or more direct communication frequencies configured in the current serving cell, where the second frequency is different from the first frequency, and the first frequency is a frequency at which direct communication is currently performed between the first terminal device and the second terminal device.

In one implementation, after the processor 901 transmits the indication information to the second terminal device by using the first frequency, the following operations may be further performed: processor 901 switches from a first frequency to a second frequency to conduct direct communication on the second frequency.

In one implementation, the processor 901 performs the switching from the first frequency to the second frequency to conduct the direct communication on the second frequency when receiving the acknowledgement message from the second terminal device.

An embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, may be used to implement the frequency processing method described in the embodiments corresponding to fig. 2 to fig. 7 in the embodiment of the present application, and details of the method are not repeated here.

The computer readable storage medium may be an internal storage unit of the terminal device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal device. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal device. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.

It will be understood by those skilled in the art that all or part of the processes in the methods of the embodiments described above may be implemented by a computer program, which may be stored in a readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. A method of frequency processing, the method comprising:

the method comprises the steps that a first terminal device determines a second frequency, wherein the second frequency is a direct communication frequency to be switched of the first terminal device;

the first terminal equipment sends indication information to second terminal equipment by using a first frequency, wherein the indication information is used for indicating that the first terminal equipment is to be switched to the second frequency, and the first frequency is the frequency of currently carrying out direct communication between the first terminal equipment and the second terminal equipment.

2. The method of claim 1, wherein the first terminal device determines the second frequency, comprising:

a first terminal device receives a switching instruction, wherein the switching instruction is used for indicating that the first terminal device needs to be switched to a target cell;

and the first terminal equipment determines a second frequency according to the target cell.

3. The method of claim 2, wherein the first terminal device determines the second frequency according to the target cell, comprising:

and the first terminal equipment determines a second frequency according to the frequency of the target cell or the direct communication frequency configured by the target cell.

4. The method of claim 1, wherein the first terminal device determines the second frequency, comprising:

the first terminal equipment determines to be switched to the pilot frequency cell according to the reported measurement report;

and the first terminal equipment determines a second frequency according to the pilot frequency cell.

5. The method of claim 4, wherein the measurement report is a measurement report corresponding to a measurement task configured with T312.

6. The method of claim 4, wherein the signal quality of the neighbor cell in the measurement report is better than the signal quality of the current serving cell.

7. The method of claim 1, wherein the first terminal device determines the second frequency, comprising:

the first terminal equipment determines that a pilot frequency cell needs to be reselected according to a measurement result, wherein the signal quality of the pilot frequency cell in the measurement result is greater than a first threshold value;

8. The method according to any of claims 2 to 7, wherein the second frequency is at least one frequency configured in the target cell or the inter-frequency cell for direct communication.

9. The method according to any of claims 2 to 7, wherein the determining, by the first terminal device, the second frequency according to the target cell or the inter-frequency cell comprises:

a first terminal device sends a first candidate frequency set to a second terminal device, wherein the first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell;

receiving, by the first terminal device, a second candidate frequency set, which is a set of one or more direct communication frequencies selected by the second terminal device from the first candidate frequency set;

the first terminal device selects one or more frequencies from the second set of candidate frequencies as a second frequency.

10. The method according to any of claims 2 to 7, wherein the determining, by the first terminal device, the second frequency according to the target cell or the inter-frequency cell comprises:

receiving, by the first terminal device, a third candidate frequency set, which is a set of one or more candidate direct communication frequencies supported by the second terminal device;

the first terminal device obtains one or more frequencies shared between a first candidate frequency set and a third candidate frequency set as a fourth candidate frequency set, where the first candidate frequency set is a candidate frequency set formed by one or more direct communication frequencies configured by the first terminal device in the target cell or the inter-frequency cell;

the first terminal device selects one or more frequencies from the third set of candidate frequencies as second frequencies.

11. The method of claim 1, wherein the first terminal device determines the second frequency, comprising:

if the location information of a first terminal device changes, or the channel occupancy on a first frequency is greater than a second threshold, or the signal power on a resource pool corresponding to the first frequency is greater than a third threshold, the first terminal device determines a second frequency from one or more direct communication frequencies configured in a current serving cell, where the second frequency is different from the first frequency, and the first frequency is a frequency at which direct communication is currently carried out between the first terminal device and the second terminal device.

12. The method of any one of claims 1 to 11, the indication information being carried by PC5 Radio Resource Control (RRC) signaling or medium access layer control information elements.

13. The method according to any one of claims 1 to 12, wherein after the first terminal device sends the indication information to the second terminal device by using the first frequency, the method further comprises:

the first terminal device switches from the first frequency to the second frequency to conduct direct communication on the second frequency.

14. The method according to claim 13, wherein said switching from said first frequency to said second frequency is performed to conduct direct communication on said second frequency when said first terminal device receives an acknowledgement message from said second terminal device.

15. A frequency processing apparatus, characterized in that the apparatus comprises:

a determining unit, configured to determine, by a first terminal device, a second frequency, where the second frequency is a direct communication frequency to be switched by the first terminal device;

a sending unit, configured to send, by the first terminal device, indication information to a second terminal device by using a first frequency, where the indication information is used to indicate that the first terminal device is to be switched to the second frequency, and the first frequency is a frequency at which direct communication is currently performed between the first terminal device and the second terminal device.

16. A terminal device, characterized in that it comprises a processor and a memory, said processor and memory being interconnected, wherein said memory is adapted to store a computer program comprising program instructions, said processor being configured to invoke said program instructions to perform the method according to any one of claims 1 to 14.

17. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1 to 14.