CN111836372A

CN111836372A - Communication method and device

Info

Publication number: CN111836372A
Application number: CN201910326940.2A
Authority: CN
Inventors: 姚楚婷; 徐海博; 王键
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-10-27
Anticipated expiration: 2039-04-23
Also published as: WO2020216239A1; CN111836372B

Abstract

The application relates to a communication method and equipment, which are used for improving the transmission performance of terminal equipment. One of the communication methods comprises: the terminal equipment uses the second side link to send resources; the terminal equipment receives first system information from network equipment; when the first sidelink sending resource indicated by the first system information is different from the second sidelink sending resource, the terminal equipment uses the second sidelink sending resource. Equivalently, if the terminal device does not obtain the detection result of the new sidelink transmission resource, the terminal device can continue to use the old sidelink transmission resource without using the sidelink special transmission resource, thereby improving the transmission performance of the terminal device.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and device.

Background

When a terminal device resides in a cell, the terminal device may use a resource pool (resource pool) configured by the current cell to perform data transmission on a Sidelink (SL). Currently, the information of the resource pool can be transmitted through the system information, and the system information may be changed. For the terminal device, if the system information changes, the terminal device considers that the resource pool has changed, and then the terminal device needs to start using the resource pool provided by the new system information. For example, when using a transmission resource pool included in a new resource pool, the terminal device needs to perform probing (sensing) on the transmission resource pool to select an available resource from the transmission resource pool. In the detection process, the terminal device can only use the special sending resource pool provided by the new resource pool, and the terminal device only needs to randomly select the resources from the special sending resource pool when using the resources in the special sending resource pool.

Without the detection process, when the terminal device uses the special transmission resource pool, the terminal device has a high possibility of colliding with other terminal devices when selecting resources, which results in the reduction of the transmission performance of the terminal device.

Disclosure of Invention

The embodiment of the application provides a communication method and equipment, which are used for improving the transmission performance of terminal equipment.

In a first aspect, a first communication method is provided, the method including: the terminal equipment uses the second side link to send resources; the terminal equipment receives first system information from network equipment; when the first sidelink sending resource indicated by the first system information is different from the second sidelink sending resource, the terminal equipment uses the second sidelink sending resource.

The method may be performed by a first communication device, which may be a communication apparatus or a communication device, such as a system-on-a-chip, capable of supporting the communication apparatus to implement the functionality required for the method. Illustratively, the communication device is a terminal device.

In this embodiment of the present application, if a first sidelink transmission resource indicated by first system information is different from a second sidelink transmission resource indicated by second system information, and the first sidelink transmission resource does not have a detection result available, the terminal device may use the second sidelink transmission resource, which is equivalent to that, if the terminal device has not obtained a detection result of a new sidelink transmission resource, the terminal device may continue to use an old sidelink transmission resource without using a sidelink special transmission resource, thereby improving the transmission performance of the terminal device.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the method further includes any one of the following:

the terminal equipment receives a first message, wherein the first message is used for indicating whether system information is changed or not; or the like, or, alternatively,

the terminal equipment receives a first message, wherein the first message comprises indication information, and the indication information is used for indicating whether side link sending resources are changed or not when system information is changed; or the like, or, alternatively,

the terminal equipment receives a first message, and when the first message comprises indication information, the indication indicates that the side link sending resource changes when the system information changes; or, when the first message does not include the indication information, indicating that the sidelink transmission resource is not changed when the system information is changed; or the like, or, alternatively,

the terminal device receives a first message, and when the first message includes time information, the first message indicates that sidelink transmission resources are changed when system information is changed, or when the first message does not include time information, the first message indicates that sidelink transmission resources are not changed when system information is changed.

In practical applications, the above cases may be used optionally, or specifically selected which may be configured by the network device or specified by the protocol. The first message may indicate whether system information has changed, and if the system information has changed, the sidelink transmission resource is considered to have changed; alternatively, the first message may also directly indicate whether the sidelink transmission resource will change when the system information changes, so that the indication manner is more direct. Furthermore, there may be multiple specific indication manners of the first message, which are just some of them, and this embodiment of the application does not limit how the first message indicates whether the system information changes or indicates whether the sidelink transmission resource changes when the system information changes.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the terminal device may compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

The terminal device may determine whether the first sidelink transmission resource is the same as the second sidelink transmission resource, and the terminal device may indicate the first sidelink transmission resource through the first message, or the terminal device may determine the first sidelink transmission resource through its own comparison. The terminal equipment self-comparison mode is adopted, the network equipment does not need to indicate through the first message, and transmission resources are saved.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the terminal device may use the second sidelink transmission resource by any one of the following manners: the terminal equipment detects the first side link sending resource and continues to use the second side link sending resource before obtaining a detection result; or, the terminal device uses the second sidelink transmission resource until obtaining the detection result of the first sidelink transmission resource.

If the network device indicates whether the system information is changed through the first message or indicates whether the sidelink transmission resource is changed when the system information is changed through the indication information included in the first message, the terminal device may directly use the second sidelink transmission resource and may probe the first sidelink transmission resource when determining that the first sidelink transmission resource is different from the second sidelink transmission resource, may continuously use the second sidelink transmission resource before acquiring the probing result, resumes using the first sidelink transmission resource when acquiring the probing result, and stops using the second sidelink transmission resource. By the method, the terminal equipment can be prevented from using the special transmitting resource of the sidelink, and the collision generated when the terminal equipment selects the resource is reduced.

With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the method may further include any one of the following:

before the time indicated by the time information arrives, if the terminal device obtains the detection result of the first side uplink transmission resource, the terminal device uses the first side uplink transmission resource when obtaining the detection result of the first side uplink transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the terminal device does not obtain the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the terminal device uses a sidelink special transmission resource, wherein the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information used for indicating the second sidelink transmission resource.

This may be done by the terminal device if the network device indicates, by means of the time information included in the first message, whether or not the sidelink transmission resources will change when the system information changes. Take the example that the time information is the information of the timer. After receiving the first system information, the terminal device may start a timer, where a duration of the timer is a duration indicated by the time information. If the terminal device obtains the probing result of the first sidelink transmission resource before the timer is over time, the terminal device may start to use the first sidelink transmission resource when obtaining the probing result of the first sidelink transmission resource. Because the time for obtaining the detection result may be different for different terminal devices, with this implementation, the terminal device may use the first sidelink transmission resource when obtaining the detection result of the first sidelink transmission resource, so that the time for using the first sidelink transmission resource may be different for different terminal devices, and the probability of collision when selecting the resource due to the fact that a plurality of terminal devices use the first sidelink transmission resource at the same time may also be reduced. Now that the first sidelink transmission resource is used, this indicates that the terminal device stops using the second sidelink transmission resource.

When the timer times out, if the terminal device has not obtained the detection result of the first sidelink transmission resource, the terminal device may start to use the sidelink special transmission resource, which may be the first sidelink special transmission resource indicated by the first system information or may be the second sidelink special transmission resource indicated by the second system information. Now that the sidelink specific transmission resource is used, this indicates that the terminal device stops using the second sidelink transmission resource. Certainly, the terminal device may further continue to detect the first sidelink transmission resource in the process of using the sidelink special transmission resource, and when the detection result of the first sidelink transmission resource is obtained, the terminal device may stop using the sidelink special transmission resource and start using the first sidelink transmission resource, so as to reduce the collision probability. The system information changes, and besides the sidelink resources may change, other configurations may also change, so the terminal device needs to apply the new configuration provided by the new system information as soon as possible. Moreover, the old sidelink resource is likely to be time-efficient, for example, the network device has indicated the new sidelink resource through the new system information, the old sidelink resource is likely to fail after a period of time, and if the terminal device applies the old sidelink resource for a long time, the terminal device may fail to transmit. Therefore, in the embodiment of the present application, time information is specified for the terminal device, and when the time indicated by the time information arrives, the terminal device may stop using the second sidelink transmission resource and start using the first sidelink transmission resource or the sidelink special transmission resource regardless of whether the terminal device obtains the detection result of the first sidelink transmission resource, so as to improve the transmission success rate of the terminal device.

With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the method may further include any one of the following:

before the time indicated by the time information arrives, if the terminal equipment acquires the detection result of the first side uplink transmission resource, the terminal equipment uses the first side uplink transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

This may also be used by the terminal device if the network device indicates, by means of the time information included in the first message, whether or not the sidelink transmission resources will change when the system information changes.

Take the example that the time information is the information of the timer. The terminal device may start a timer at the starting time of the next modification period after receiving the first message, where the duration of the timer is the duration indicated by the time information. Before the timer is overtime, if the terminal equipment acquires the detection result of the first side-link transmission resource, the terminal equipment continues to use the second side-link transmission resource until the timer is overtime, and the terminal equipment starts to use the first side-link transmission resource. That is, in this implementation, the terminal device may wait until the timer times out and then start to use the first sidelink transmission resource, and this implementation enables the network device to determine when the terminal device starts to use the first sidelink transmission resource, which is convenient for the network device to manage. Furthermore, since the first sidelink transmission resource is used, it indicates that the terminal device stops using the second sidelink transmission resource.

With reference to the fourth possible implementation manner of the first aspect or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, after the terminal device receives the first system information and before using the first sidelink transmission resource or using the sidelink specific transmission resource, the method may further include any one of the following cases:

the terminal equipment continues to use all the configuration of the side link indicated by the second system information; or the like, or, alternatively,

the terminal equipment uses the rest configurations except the first side link transmission resource in all the configurations of the side link indicated by the first system information; or

The terminal equipment uses part of the configuration of the side link indicated by the first system information except the first side link transmission resource.

After receiving the first system information and before using the first sidelink transmission resource or before using the sidelink specific transmission resource, the terminal device may use the entire configuration of the sidelink indicated by the second system information, that is, the terminal device uses the entire configuration of the sidelink indicated by the second system information such as the second sidelink reception resource in addition to the second sidelink transmission resource. After acquiring the probing result of the first sidelink transmission resource, the terminal device uses all configurations of the sidelink indicated by the first system information, that is, after acquiring the probing result of the first sidelink transmission resource, the terminal device stops using all configurations of the sidelink indicated by the second system information and uses all configurations of the sidelink indicated by the first system information instead. In this way, the terminal device can integrally replace the configuration related to the sidelink, and the implementation mode is simpler.

Alternatively, after receiving the first system information, and before using the first sidelink transmission resource or before using the sidelink specific transmission resource, the terminal device may use only the second sidelink transmission resource indicated by the second system information, and for other configurations of the sidelink, all use the configuration indicated by the first system information. That is, before acquiring the probe result of the first sidelink transmission resource, the terminal device uses all configurations of the sidelink except for the first sidelink transmission resource among all configurations of the sidelink indicated by the first system information. And after acquiring the detection result of the first sidelink transmission resource, the terminal equipment uses the first sidelink transmission resource, and for other configurations of the sidelink, the terminal equipment continues to use the configuration indicated by the first system information. That is, after acquiring the detection result of the first sidelink transmission resource, the terminal device only needs to change the sidelink transmission resource. In this way, the corresponding configuration provided by the new system information can be applied as soon as possible.

Alternatively, after receiving the first system information, and before using the first sidelink transmission resource or before using the sidelink specific transmission resource, the terminal device may use a part of the configuration indicated by the first system information in addition to the second sidelink transmission resource indicated by the second system information, and in addition to that, the terminal device uses the configuration indicated by the first system information. That is, before acquiring the probe result of the first sidelink transmission resource, the terminal device may use a remaining part of the configuration of the sidelink, except for the first sidelink transmission resource, among the entire configuration of the sidelink indicated by the first system information. For example, the terminal device may use the second sidelink transmission resources and the second sidelink reception resources indicated by the second system information, while for other configurations of the sidelink, the terminal device may use the content indicated by the first system information. In this way, the corresponding configuration provided by the new system information can be applied as soon as possible.

In a second aspect, a second communication method is provided, which may include: the terminal equipment uses the second side link to send resources; the terminal equipment receives first system information from network equipment; when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource and the first sidelink transmission resource has no available detection result, the terminal device detects the first sidelink transmission resource and continues to use the second sidelink transmission resource in the detection process.

The method may be performed by a second communication device, which may be a communication apparatus or a communication device capable of supporting a communication apparatus to implement the functions required by the method, such as a system-on-a-chip. Illustratively, the communication device is a terminal device.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes any one of the following:

the terminal equipment receives a first message, wherein the first message is used for indicating that system information changes; or the like, or, alternatively,

the terminal equipment receives a first message, and when the first message comprises time information, the terminal equipment indicates that the side link sending resource changes when the system information changes; or, when the first message does not include time information, indicating that sidelink transmission resources are not changed when system information is changed.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the terminal device may compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the terminal device may probe the first sidelink transmission resource through any one of the following manners, and continue to use the second sidelink transmission resource during the probing process:

the terminal equipment detects the first side link sending resource and continues to use the second side link sending resource before obtaining a detection result; or the like, or, alternatively,

and the terminal equipment uses the second side link transmission resource and detects the first side link transmission resource until the detection result of the first side link transmission resource is obtained.

With reference to the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the method may further include any one of the following:

With reference to the first possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the method may further include any one of the following:

With reference to the fourth possible implementation manner of the second aspect or the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, after the terminal device receives the first system information and before using the first sidelink transmission resource or using the sidelink specific transmission resource, the method may further include any one of the following cases:

the terminal equipment continues to use all the configuration of the side link provided by the second system information; or the like, or, alternatively,

the terminal equipment uses the rest configurations except the first side link transmission resource in all the configurations of the side link provided by the first system information; or

The terminal device uses part of the configuration of the side link provided by the first system information except the first side link transmission resource.

With regard to the technical effects brought by the second aspect or the various embodiments of the second aspect, reference may be made to the introduction of the technical effects of the first aspect or the various embodiments of the first aspect, and details are not repeated.

In a third aspect, a third method of communication is provided, the method comprising: the terminal equipment receives a first message from the network equipment; and the terminal equipment determines whether the side link sending resource changes or not when the system information changes according to the first message.

The method may be performed by a third communication device, which may be a communication apparatus or a communication device capable of supporting a communication apparatus to implement the functions required by the method, such as a system-on-chip. Illustratively, the communication device is a terminal device.

In this embodiment of the present application, the network device may indicate, through the first message, whether the sidelink transmission resource changes when the system information changes, so that if the terminal device determines that the sidelink transmission resource does not change when the system information changes, the terminal device may continue to use the old sidelink transmission resource without using a new sidelink transmission resource, that is, without detecting the new sidelink transmission resource, thereby reducing the power consumption of the terminal device. And the terminal equipment does not need to use a special sending resource pool of new side link sending resources, thereby reducing the collision generated when the terminal equipment selects the resources and improving the transmission performance of the terminal equipment.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first message may include any one of the following cases:

the first message comprises indication information, and the indication information is used for indicating whether the side link sending resource changes when the system information changes; or

When the first message comprises indication information, indicating that the side link transmission resource is changed when the system information is changed; or, when the first message does not include the indication information, indicating that the sidelink transmission resource is not changed when the system information is changed.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the terminal device determines, according to the first message, that a sidelink transmission resource changes when system information changes, and then the terminal device may further read new system information, perform probing on a first transmission resource pool, and continue to use a second transmission resource pool before obtaining a probing result, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the terminal device before the system information changes.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, after reading new system information and before acquiring the detection result, the terminal device may further perform any one of the following operations:

the terminal equipment continues to use all configurations of the sidelink before the system information is changed; or the like, or, alternatively,

the terminal equipment uses the rest configurations except the first side link transmission resource in all the configurations of the side link provided by the new system information; or the like, or, alternatively,

and the terminal equipment uses part of the configuration of the sidelink except the first sidelink transmission resource in the whole configuration of the sidelink provided by the new system information.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the first message may include any one of the following cases:

when the first message includes time information, indicating that sidelink transmission resources are changed when system information is changed; or the like, or, alternatively,

when the first message does not include time information, indicating that sidelink transmission resources are not changed when system information is changed.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect,

the time information is configuration information of a timer, or information of a first moment, or time offset.

With reference to the fourth possible implementation manner of the third aspect or the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the terminal device determines, according to the first message, that a sidelink transmission resource changes when system information changes, and then the terminal device may read new system information, probe a first sidelink transmission resource, and continue to use a second sidelink transmission resource, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the terminal device before the system information changes. Before the time indicated by the time information arrives, if the terminal device obtains the proposed result of the first side uplink transmission resource, the terminal device uses the first side uplink transmission resource when obtaining the detection result of the first side uplink transmission resource; or, when the time indicated by the time information arrives, if the terminal device does not obtain the detection result of the first sidelink transmission resource, when the timer is overtime, the terminal device uses a sidelink special transmission resource, where the sidelink special transmission resource is a sidelink special transmission resource before the system information is not changed or a sidelink special transmission resource provided by the new system information.

With reference to the fourth possible implementation manner of the third aspect or the fifth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the terminal device determines, according to the first message, that the sidelink transmission resource changes when the system information changes, and then the terminal device may further read new system information, perform probing on the first sidelink transmission resource, and continue to use the second sidelink transmission resource. Before the time indicated by the time information arrives, if the terminal equipment acquires the detection result of the first side-link transmission resource, the terminal equipment uses the first side-link transmission resource when the timer is overtime; or, when the time indicated by the time information arrives, if the terminal device does not obtain the detection result of the first sidelink transmission resource, when the timer is overtime, the terminal device uses a sidelink special transmission resource, where the sidelink special transmission resource is a sidelink special transmission resource before the system information is not changed or a sidelink special transmission resource provided by the new system information.

With reference to the sixth possible implementation manner of the third aspect or the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner of the third aspect, after reading new system information and before using the first sidelink transmission resource or using the sidelink specific transmission resource, the terminal device may further perform any one of the following operations:

the terminal equipment uses the rest configurations except the first side link transmission resource in all the configurations of the side link provided by the new system information;

With reference to the third aspect or any possible implementation manner of the first possible implementation manner of the third aspect to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the terminal device determines, according to the first message, that sidelink transmission resources do not change when system information changes, and then the terminal device may further read new system information and use second sidelink transmission resources, where the second sidelink transmission resources are sidelink transmission resources used by the terminal device before the system information changes.

For technical effects brought by various embodiments of the third aspect, reference may be made to the introduction of the technical effects of the first aspect or the various embodiments of the first aspect, and details are not repeated.

In a fourth aspect, a fourth communication method is provided, the method comprising: the network equipment generates a first message, wherein the first message is used for indicating whether the side link sending resource changes when the system information changes; the network device sends the first message.

The method may be performed by a fourth communication device, which may be a communication apparatus or a communication device capable of supporting a communication apparatus to implement the functions required by the method, such as a system-on-chip. Illustratively, the communication device is a network device.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first message includes indication information, where the indication information is used to indicate whether a change occurs in the sidelink transmission resource when the system information changes.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the first message may include any one of the following cases:

the first message includes time information indicating that sidelink transmission resources are changed when system information is changed; or the like, or, alternatively,

the first message does not include time information indicating that sidelink transmission resources do not change when system information changes.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the time information is configuration information of a timer, or information of a first time instant, or a time offset.

With regard to the technical effects brought by the fourth aspect or the various embodiments of the fourth aspect, reference may be made to the introduction of the technical effects of the first aspect or the various embodiments of the first aspect, and details are not repeated.

In a fifth aspect, a first communication device is provided, for example, the first communication device as described above. The communication device includes a processor and a transceiver. The processor and the transceiver may be adapted to implement the method described in the first aspect above or in various possible designs of the first aspect. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. Wherein, the transceiver is implemented by an antenna, a feeder, a codec, etc. in the communication device, for example, or, if the communication device is a chip disposed in the communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiving component in the communication device to implement transceiving of information by the radio frequency transceiving component. Wherein the content of the first and second substances,

the transceiver is configured to transmit resources using a second sidelink;

the transceiver is further used for receiving first system information from a network device;

the processor, coupled to the transceiver, is configured to cause the communication device to use the second sidelink transmission resource when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the transceiver is further configured to:

receiving a first message, wherein the first message is used for indicating whether system information is changed or not; or the like, or, alternatively,

receiving a first message, wherein the first message comprises indication information, and the indication information is used for indicating whether side link sending resources are changed when system information is changed; or the like, or, alternatively,

receiving a first message, wherein when the first message comprises indication information, the indication indicates that the side link sending resource changes when the system information changes; or, when the first message does not include the indication information, indicating that the sidelink transmission resource is not changed when the system information is changed; or the like, or, alternatively,

receiving a first message, wherein the first message indicates that sidelink transmission resources are changed when system information is changed when the first message includes time information, or indicates that sidelink transmission resources are not changed when system information is changed when the first message does not include time information.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the processor is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

With reference to the first possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the processor is configured to enable the communication apparatus to use the second downlink transmission resource by: the processor causes the communications device to probe for the first sidelink transmission resource and causes the communications device to continue to use the second sidelink transmission resource before acquiring a probe result; or, the processor enables the communication device to use the second sidelink transmission resource until the communication device obtains the detection result of the first sidelink transmission resource.

With reference to the first possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect,

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first side link transmission resource, the processor enables the communication device to use the first side link transmission resource when acquiring the detection result of the first side link transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication apparatus does not obtain the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the processor enables the communication apparatus to use a sidelink special transmission resource, wherein the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information used for indicating the second sidelink transmission resource.

With reference to the first possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect,

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first side link transmission resource, the processor enables the communication device to use the first side link transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

With reference to the fourth possible implementation manner of the fifth aspect or the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, after the transceiver receives the first system information and before the processor causes the communication apparatus to use the first sidelink transmission resource or before the processor causes the communication apparatus to use the sidelink specific transmission resource, the processor causes the communication apparatus to:

continuing to use the full configuration of the sidelink indicated by the second system information; or the like, or, alternatively,

using the rest configuration except the first side link transmission resource in all the configurations of the side link indicated by the first system information; or

And using part of the whole configuration of the side link indicated by the first system information except the first side link transmission resource.

With regard to the technical effects brought by the fifth aspect or the various embodiments of the fifth aspect, reference may be made to the introduction of the technical effects of the first aspect or the various embodiments of the first aspect, and details are not repeated.

In a sixth aspect, a second communication device is provided, for example, the second communication device as described above. The communication device includes a processor and a transceiver. The processor and transceiver may be used to implement the methods described above for the second aspect or for the various possible designs of the second aspect. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. Wherein, the transceiver is implemented by an antenna, a feeder, a codec, etc. in the communication device, for example, or, if the communication device is a chip disposed in the communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiving component in the communication device to implement transceiving of information by the radio frequency transceiving component. Wherein the content of the first and second substances,

the transceiver is configured to transmit resources using a second sidelink;

when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource and the first sidelink transmission resource has no available detection result, the processor enables the communication device to detect the first sidelink transmission resource, and the processor enables the communication device to continue using the second sidelink transmission resource in the detection process.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the transceiver is further configured to:

receiving a first message, wherein the first message is used for indicating that system information changes; or the like, or, alternatively,

receiving a first message, indicating that a sidelink transmission resource is changed when system information is changed when the first message comprises time information; or, when the first message does not include time information, indicating that sidelink transmission resources are not changed when system information is changed.

With reference to the sixth aspect, in a second possible implementation manner of the sixth aspect, the processor is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

With reference to the first possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the processor enables the communication apparatus to probe the first sidelink transmission resource by:

the processor causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or

The processor causes the communication device to use the second sidelink transmission resource, and the processor causes the communication device to perform probing on the first sidelink transmission resource until a probing result of the first sidelink transmission resource is obtained.

With reference to the first possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect,

With reference to the first possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect,

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first side link transmission resource, the transceiver uses the first side link transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

With reference to the fourth possible implementation manner of the sixth aspect or the fifth possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, after the transceiver receives the first system information and before the processor causes the communication apparatus to use the first sidelink transmission resource or before the processor causes the communication apparatus to use the sidelink specific transmission resource, the processor is further configured to:

continuing to use all configurations of the sidelink provided by the second system information; or the like, or, alternatively,

using the rest configurations except the first sidelink transmission resource in all configurations of sidelink provided by the first system information; or

And using part of the whole configuration of the sidelink provided by the first system information except the first sidelink transmission resource.

With regard to the technical effects brought by the sixth aspect or the various embodiments of the sixth aspect, reference may be made to the introduction of the technical effects of the second aspect or the various embodiments of the second aspect, and details are not repeated.

In a seventh aspect, a third communication device is provided, for example, the third communication device as described above. The communication device includes a processor and a transceiver. The processor and transceiver may be adapted to implement the methods described in the third aspect or the various possible designs of the third aspect described above. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. Wherein, the transceiver is implemented by an antenna, a feeder, a codec, etc. in the communication device, for example, or, if the communication device is a chip disposed in the communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiving component in the communication device to implement transceiving of information by the radio frequency transceiving component. Wherein the content of the first and second substances,

the transceiver is used for receiving a first message from a network device;

and the processor is used for determining whether the side link sending resource changes or not when the system information changes according to the first message.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect,

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the processor is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver is further configured to read new system information, and the processor is further configured to enable the communication apparatus to probe a first transmission resource pool, and the processor is further configured to enable the communication apparatus to continue to use a second transmission resource pool before acquiring a probe result, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the terminal device before the system information is changed.

With reference to the second possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, after the transceiver reads new system information and before the communication apparatus acquires the probe result, the processor is further configured to cause the communication apparatus to:

continuing to use all configurations of the sidelink before the system information is changed; or the like, or, alternatively,

using the rest configurations except the first sidelink transmission resource in all configurations of sidelink provided by the new system information; or the like, or, alternatively,

and using part of the whole configuration of the sidelink provided by the new system information except the first sidelink transmission resource.

With reference to the seventh aspect, in a fourth possible implementation manner of the seventh aspect,

With reference to the fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner of the seventh aspect,

With reference to the fourth possible implementation manner of the seventh aspect or the fifth possible implementation manner of the seventh aspect, in a sixth possible implementation manner of the seventh aspect, the processor is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver is further configured to read new system information, the processor is further configured to enable the communication apparatus to probe for a first sidelink transmission resource, and the processor is further configured to enable the communication apparatus to continue to use a second sidelink transmission resource, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the communication apparatus before the system information is changed;

before the time indicated by the time information arrives, if the communication apparatus obtains the proposed result of the first sidelink transmission resource, the processor is further configured to enable the communication apparatus to use the first sidelink transmission resource when obtaining the detection result of the first sidelink transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication apparatus does not obtain the detection result of the first sidelink transmission resource, when the timer is overtime, the processor is further configured to enable the communication apparatus to use a sidelink special transmission resource, where the sidelink special transmission resource is a sidelink special transmission resource before the system information is not changed or a sidelink special transmission resource provided by the new system information.

With reference to the fourth possible implementation manner of the seventh aspect or the fifth possible implementation manner of the seventh aspect, in a seventh possible implementation manner of the seventh aspect, the processor is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver is further configured to read new system information, the processor is further configured to cause the communication device to probe for a first sidelink transmission resource, and the processor is further configured to cause the communication device to continue using a second sidelink transmission resource;

before the time indicated by the time information arrives, if the communication apparatus obtains a detection result of the first sidelink transmission resource, when the timer is overtime, the processor is further configured to enable the communication apparatus to use the first sidelink transmission resource; or the like, or, alternatively,

With reference to the sixth possible implementation manner of the seventh aspect or the seventh possible implementation manner of the seventh aspect, in an eighth possible implementation manner of the seventh aspect, after the transceiver reads new system information and before the processor causes the communication apparatus to use the first sidelink transmission resource or before the processor causes the communication apparatus to use the sidelink special transmission resource, the processor is further configured to cause the communication apparatus to:

using the rest configurations except the first sidelink transmission resource in all configurations of sidelink provided by the new system information;

With reference to the seventh aspect or any possible implementation manner of the first possible implementation manner to the eighth possible implementation manner of the seventh aspect, in a ninth possible implementation manner of the seventh aspect, the processor is configured to determine, according to the first message, that sidelink transmission resources do not change when system information changes, and the transceiver is further configured to read new system information, and the processor is further configured to enable the communication apparatus to use second sidelink transmission resources, where the second sidelink transmission resources are used by the communication apparatus before the system information changes.

With regard to the technical effects brought by the seventh aspect or the various embodiments of the seventh aspect, reference may be made to the introduction of the technical effects of the third aspect or the various embodiments of the third aspect, and details are not repeated.

In an eighth aspect, a fourth communication device is provided, for example, the fourth communication device as described above. The communication device includes a processor and a transceiver. The processor and transceiver may be adapted to implement the methods described in the fourth aspect or the various possible designs of the fourth aspect described above. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a network device. Wherein, the transceiver is implemented by an antenna, a feeder, a codec, etc. in the communication device, for example, or, if the communication device is a chip disposed in the communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiving component in the communication device to implement transceiving of information by the radio frequency transceiving component. Wherein the content of the first and second substances,

the processor is configured to generate a first message, where the first message is used to indicate whether a sidelink transmission resource changes when system information changes;

the transceiver is configured to transmit the first message.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the first message includes indication information, where the indication information is used to indicate whether a change occurs in the sidelink transmission resource when the system information changes.

With reference to the eighth aspect, in a second possible implementation manner of the eighth aspect,

With reference to the second possible implementation manner of the eighth aspect, in a third possible implementation manner of the eighth aspect, the time information is configuration information of a timer, or information of a first time instant, or a time offset.

With regard to the technical effects brought by the eighth aspect or the various embodiments of the eighth aspect, reference may be made to the introduction of the technical effects of the fourth aspect or the various embodiments of the fourth aspect, and details are not repeated.

A ninth aspect provides a fifth communication device, for example, the communication device is the first communication device as described above. The communication device is configured to perform the method of the first aspect or any possible implementation manner of the first aspect. In particular, the communication device may comprise means for performing the method of the first aspect or any of its possible implementations, for example comprising a processing means and a transceiver means coupled to each other. Illustratively, the communication device is a communication apparatus. Illustratively, the communication device is a terminal device. Wherein the content of the first and second substances,

the transceiver module is configured to transmit resources using a second sidelink;

the transceiver module is used for receiving first system information from network equipment;

the processing module is further configured to cause the communication apparatus to use the second sidelink transmission resource when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource.

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the transceiver module is further configured to:

With reference to the ninth aspect, in a second possible implementation manner of the ninth aspect, the processing module is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

With reference to the first possible implementation manner of the ninth aspect, in a third possible implementation manner of the ninth aspect, the processing module is configured to enable the communication apparatus to use the second downlink transmission resource by: the processing module causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or, the processing module enables the communication device to use the second sidelink transmission resource until the communication device obtains the detection result of the first sidelink transmission resource.

With reference to the first possible implementation manner of the ninth aspect, in a fourth possible implementation manner of the ninth aspect,

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first side link transmission resource, the processing module enables the communication device to use the first side link transmission resource when acquiring the detection result of the first side link transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication apparatus does not obtain the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the processing module enables the communication apparatus to use a sidelink special transmission resource, where the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information indicating the second sidelink transmission resource.

With reference to the first possible implementation manner of the ninth aspect, in a fifth possible implementation manner of the ninth aspect, the processing module is further configured to:

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first side link transmission resource, the processing module enables the communication device to use the first side link transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

With reference to the fourth possible implementation manner of the ninth aspect or the fifth possible implementation manner of the ninth aspect, in a sixth possible implementation manner of the ninth aspect, the transceiver module is further configured to, after receiving the first system information, and before the processing module causes the communication apparatus to use the first sidelink transmission resource or before the processing module causes the communication apparatus to use the sidelink specific transmission resource, cause the communication apparatus to:

With regard to the technical effects brought by the various embodiments of the ninth aspect or the ninth aspect, reference may be made to the introduction of the technical effects of the various embodiments of the first aspect or the first aspect, and details are not repeated.

A tenth aspect provides a sixth communication device, for example, the communication device is the second communication device as described above. The communication device is configured to perform the method of the second aspect or any possible implementation manner of the second aspect. In particular, the communication device may comprise means for performing the method of the second aspect or any possible implementation manner of the second aspect, for example comprising a processing means and a transceiver means coupled to each other. Illustratively, the communication device is a communication apparatus. Illustratively, the communication device is a terminal device. Wherein the content of the first and second substances,

the transceiver module is further configured to receive first system information from a network device;

the processing module is configured to, when a first sidelink transmission resource indicated by the first system information is different from a second sidelink transmission resource and the first sidelink transmission resource has no available detection result, cause the communication device to detect the first sidelink transmission resource, and further cause the communication device to continue to use the second sidelink transmission resource in a detection process.

With reference to the tenth aspect, in a first possible implementation manner of the tenth aspect, the transceiver module is further configured to:

With reference to the tenth aspect, in a second possible implementation manner of the tenth aspect, the processing module is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

With reference to the first possible implementation manner of the tenth aspect, in a third possible implementation manner of the tenth aspect, the processing module is configured to enable the communication apparatus to probe the first sidelink transmission resource and enable the communication apparatus to continue to use the second sidelink transmission resource during the probing by:

the processing module causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or

The processing module causes the communication device to use the second sidelink transmission resource and causes the communication device to probe the first sidelink transmission resource until a probing result of the first sidelink transmission resource is obtained.

With reference to the first possible embodiment of the tenth aspect, in a fourth possible embodiment of the tenth aspect,

With reference to the first possible implementation manner of the tenth aspect, in a fifth possible implementation manner of the tenth aspect, the transceiver module is further configured to:

With reference to the fourth possible implementation manner of the tenth aspect or the fifth possible implementation manner of the tenth aspect, in a sixth possible implementation manner of the tenth aspect, after the transceiver module receives the first system information, and before the processing module causes the communication apparatus to use the first sidelink transmission resource or before the processing module causes the communication apparatus to use the sidelink specific transmission resource, the processing module is further configured to cause the communication apparatus to:

With regard to the technical effects brought by the tenth aspect or the various embodiments of the tenth aspect, reference may be made to the introduction of the technical effects of the second aspect or the various embodiments of the second aspect, and details are not repeated.

In an eleventh aspect, a seventh communication device is provided, for example, the communication device is the third communication device as described above. The communication device is configured to perform the method of the third aspect or any possible implementation manner of the third aspect. In particular, the communication device may comprise means for performing the method of the third aspect or any possible implementation manner of the third aspect, for example comprising a processing means and a transceiver means coupled to each other. Illustratively, the communication device is a communication apparatus. Illustratively, the communication device is a terminal device. Wherein the content of the first and second substances,

the transceiver module is used for receiving a first message from the network equipment;

and the processing module is used for determining whether the side link sending resource changes or not when the system information changes according to the first message.

With reference to the eleventh aspect, in a first possible implementation manner of the eleventh aspect,

With reference to the first possible implementation manner of the eleventh aspect, in a second possible implementation manner of the eleventh aspect, the processing module is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver module is further configured to read new system information, the processing module is further configured to enable the communication device to probe a first transmission resource pool, the processing module is further configured to enable the communication device to continue to use a second transmission resource pool before acquiring a probe result, the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the terminal device before the system information is changed.

With reference to the second possible implementation manner of the eleventh aspect, in a third possible implementation manner of the eleventh aspect, after the transceiver module reads new system information and before the communication device acquires the detection result, the processing module is further configured to cause the communication device to:

With reference to the eleventh aspect, in a fourth possible embodiment of the eleventh aspect,

In combination with the fourth possible embodiment of the eleventh aspect, in a fifth possible embodiment of the eleventh aspect,

With reference to the fourth possible implementation manner of the eleventh aspect or the fifth possible implementation manner of the eleventh aspect, in a sixth possible implementation manner of the eleventh aspect, the processing module is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver module is further configured to read new system information, and the processing module is further configured to enable the communication apparatus to detect a first sidelink transmission resource and enable the communication apparatus to continue to use a second sidelink transmission resource, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the communication apparatus before the system information is changed;

before the time indicated by the time information arrives, if the communication apparatus obtains the proposed result of the first sidelink transmission resource, the processing module is further configured to enable the communication apparatus to use the first sidelink transmission resource when obtaining the detection result of the first sidelink transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication apparatus does not obtain the detection result of the first sidelink transmission resource, when the timer is overtime, the processing module is further configured to enable the communication apparatus to use a sidelink special transmission resource, where the sidelink special transmission resource is a sidelink special transmission resource before the system information is not changed or a sidelink special transmission resource provided by the new system information.

With reference to the fourth possible implementation manner of the eleventh aspect or the fifth possible implementation manner of the eleventh aspect, in a seventh possible implementation manner of the eleventh aspect, the processing module is configured to determine, according to the first message, that a sidelink transmission resource changes when system information changes,

the transceiver module is further configured to read new system information, and the processing module is further configured to enable the communication device to probe a first sidelink transmission resource and enable the communication device to continue to use a second sidelink transmission resource;

before the time indicated by the time information arrives, if the communication apparatus obtains a detection result of the first sidelink transmission resource, when the timer is overtime, the processing module is further configured to enable the communication apparatus to use the first sidelink transmission resource; or the like, or, alternatively,

With reference to the sixth possible implementation manner of the eleventh aspect or the seventh possible implementation manner of the eleventh aspect, in an eighth possible implementation manner of the eleventh aspect, the transceiver module is further configured to, after reading new system information and before the processing module is further configured to cause the communication apparatus to use the first sidelink transmission resource or before the processing module is further configured to cause the communication apparatus to use the sidelink specific transmission resource, cause the communication apparatus to:

With reference to the eleventh aspect or any one of the first possible implementation manner of the eleventh aspect to the eighth possible implementation manner of the eleventh aspect, in a ninth possible implementation manner of the eleventh aspect, the processing module is configured to determine, according to the first message, that sidelink transmission resources do not change when system information changes, the transceiver module is further configured to read new system information, and the processing module is further configured to enable the communication apparatus to use second sidelink transmission resources, where the second sidelink transmission resources are used by the communication apparatus before the system information changes.

With regard to the technical effects brought by the eleventh aspect or the various embodiments of the eleventh aspect, reference may be made to the description of the technical effects of the third aspect or the various embodiments of the third aspect, and details are not repeated.

A twelfth aspect provides an eighth communication device, for example, the communication device is the fourth communication device as described above. The communication device is configured to perform the method of the fourth aspect or any possible implementation manner of the fourth aspect. In particular, the communication device may comprise means for performing the method of the fourth aspect or any possible implementation manner of the fourth aspect, for example comprising a processing means and a transceiver means coupled to each other. Illustratively, the communication device is a communication apparatus. Illustratively, the communication device is a network device. Wherein the content of the first and second substances,

the processing module is configured to generate a first message, where the first message is used to indicate whether a sidelink transmission resource changes when system information changes;

the transceiver module is configured to send the first message.

With reference to the twelfth aspect, in a first possible implementation manner of the twelfth aspect, the first message includes indication information, where the indication information is used to indicate whether a change occurs in the sidelink transmission resource when the system information changes.

With reference to the twelfth aspect, in a second possible implementation of the twelfth aspect,

With reference to the second possible implementation manner of the twelfth aspect, in a third possible implementation manner of the twelfth aspect, the time information is configuration information of a timer, or information of a first time instant, or a time offset.

With regard to the technical effects brought by the twelfth aspect or the various embodiments of the twelfth aspect, reference may be made to the introduction of the technical effects of the fourth aspect or the various embodiments of the fourth aspect, and details are not repeated.

In a thirteenth aspect, a ninth communications apparatus is provided. The communication device may be the first communication device in the above method design. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. The communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the ninth communication device to perform the method of the first aspect or any one of the possible embodiments of the first aspect.

Wherein, the ninth communication device may further include a communication interface, which may be a transceiver in the terminal equipment, for example, implemented by an antenna, a feeder, a codec, etc. in the communication device, or, if the ninth communication device is a chip disposed in the terminal equipment, the communication interface may be an input/output interface of the chip, for example, an input/output pin, etc.

In a fourteenth aspect, a tenth communications apparatus is provided. The communication device may be the second communication device in the above method design. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. The communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the tenth communication device to perform the method of the second aspect or any one of the possible embodiments of the second aspect.

Wherein, the tenth communication means may further comprise a communication interface, which may be a transceiver in the terminal device, for example, implemented by an antenna, a feeder, a codec, etc. in the communication means, or, if the tenth communication means is a chip provided in the terminal device, the communication interface may be an input/output interface of the chip, for example, an input/output pin, etc.

In a fifteenth aspect, an eleventh communication device is provided. The communication device may be the third communication device in the above method design. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a terminal device. The communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the eleventh communication device to perform the method of the third aspect or any one of the possible embodiments of the third aspect.

Wherein, the eleventh communication means may further comprise a communication interface, which may be a transceiver in the terminal device, for example, implemented by an antenna, a feeder, a codec, etc. in the communication means, or, if the eleventh communication means is a chip provided in the terminal device, the communication interface may be an input/output interface of the chip, for example, an input/output pin, etc.

In a sixteenth aspect, a twelfth communications device is provided. The communication device may be the fourth communication device in the above method design. Illustratively, the communication means is a chip provided in the communication device. Illustratively, the communication device is a network device. The communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the twelfth communication device to perform the method of the fourth aspect or any one of the possible embodiments of the fourth aspect.

Wherein, the twelfth communication device may further include a communication interface, and the communication interface may be a transceiver in the network device, for example, implemented by an antenna, a feeder, a codec, and the like in the communication device, or, if the twelfth communication device is a chip disposed in the network device, the communication interface may be an input/output interface of the chip, for example, an input/output pin, and the like.

A seventeenth aspect provides a communication system that may include the first communication apparatus of the fifth aspect, the fifth communication apparatus of the ninth aspect, or the ninth communication apparatus of the thirteenth aspect, and include the fourth communication apparatus of the eighth aspect, the eighth communication apparatus of the twelfth aspect, or the twelfth communication apparatus of the sixteenth aspect; alternatively, the communication system may comprise the second communication apparatus of the sixth aspect, the sixth communication apparatus of the tenth aspect, or the tenth communication apparatus of the fourteenth aspect, and the fourth communication apparatus of the eighth aspect, the eighth communication apparatus of the twelfth aspect, or the twelfth communication apparatus of the sixteenth aspect; alternatively, the communication system may include the third communication device of the seventh aspect, the seventh communication device of the eleventh aspect, or the eleventh communication device of the fifteenth aspect, and include the fourth communication device of the eighth aspect, the eighth communication device of the twelfth aspect, or the twelfth communication device of the sixteenth aspect.

In an eighteenth aspect, there is provided a computer storage medium having stored therein instructions, which when run on a computer, cause the computer to perform the method as set forth in the first aspect or any one of the possible designs of the first aspect.

A nineteenth aspect provides a computer storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the method of the second aspect described above or any one of the possible designs of the second aspect.

A twentieth aspect provides a computer storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method as set forth in the third aspect or any one of the possible designs of the third aspect.

In a twenty-first aspect, there is provided a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the fourth aspect or any one of the possible designs of the fourth aspect.

In a twenty-second aspect, there is provided a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible designs of the first aspect.

A twenty-third aspect provides a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method as set forth in the second aspect or any one of the possible designs of the second aspect.

A twenty-fourth aspect provides a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method as set forth in the third aspect or any one of the possible designs of the third aspect.

A twenty-fifth aspect provides a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method of the fourth aspect described above or any one of the possible designs of the fourth aspect.

Drawings

FIG. 1 is a diagram of several scenarios of V2X;

fig. 2 is a schematic diagram of a terminal device V2X broadcasting to other terminal devices after acquiring a sending configuration;

fig. 3 is a schematic diagram of a mode3 of an LTE system in which a base station configures resources for a terminal device;

fig. 4 is a schematic diagram of a base station configuring resources to a terminal device in mode4 of an LTE system;

fig. 5 is a schematic view of an application scenario according to an embodiment of the present application;

fig. 6 is a flowchart of a communication method according to an embodiment of the present application;

fig. 7 is a schematic diagram illustrating that a terminal device uses an old sidelink transmission resource before acquiring a detection result of a new sidelink transmission resource in an embodiment of the present application;

fig. 8A is a schematic diagram of a terminal device using a new sidelink transmission resource after acquiring a detection result in the embodiment of the present application;

fig. 8B is a schematic diagram illustrating a detection result that the terminal device has not obtained a new sidelink transmission resource when the timer expires in the embodiment of the present application;

fig. 9A is a schematic diagram of a terminal device using a new sidelink transmission resource when a timer expires in an embodiment of the present application;

fig. 9B is a schematic diagram of a detection result that the terminal device has not obtained a new sidelink transmission resource when the timer expires in the embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11A to 11B are schematic diagrams of two structures of another communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1) Terminal equipment, including devices that provide voice and/or data connectivity to a user, may include, for example, handheld devices with wireless connection capability or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an Access Point (AP), a remote terminal device (remote), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a user equipment (user device), or the like. For example, mobile phones (or so-called "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included or vehicle-mounted mobile devices, smart wearable devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

2) Network devices, including, for example, Access Network (AN) devices, such as base stations (e.g., access points), may refer to devices in AN access network that communicate with wireless terminal devices over one or more cells over AN air interface, or, for example, network devices in one type of V2X technology are Road Side Units (RSUs). The base station may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The RSU may be a fixed infrastructure entity supporting all-vehicle-to-every (V2X) applications, and may exchange messages with other entities supporting V2X applications. The access network device may also coordinate attribute management for the air interface. For example, the access network device may include an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE) system or an advanced long term evolution (LTE-a), or may also include a next generation Node B (gNB) in a New Radio (NR) system of a fifth generation mobile communication technology (5G), or may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud radio access network (Cloud RAN) system, which is not limited in the present embodiment.

Of course, the network device may also include a core network device, but since the technical solution provided in the embodiment of the present application mainly relates to an access network device, hereinafter, unless otherwise specified, the "network device" described hereinafter refers to the access network device.

3) sidelink, in the LTE system, both D2D communication and V2X communication belong to a process in which a terminal device communicates with other terminal devices through a sidelink interface. D2D and V2X are both PC5 interface based communications, and the resources used by both may be collectively referred to as sidelink's resources.

4) V2X, in version (Rel) -14/15/16, V2X has established itself as a major application of device-to-device (D2D) technology. The V2X optimizes the specific application requirements of V2X based on the existing D2D technology, and needs to further reduce the access delay of V2X devices and solve the problem of resource conflict.

V2X specifically includes several application requirements, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) communication interaction. As shown in fig. 1. V2V refers to inter-vehicle communication; V2P refers to vehicle-to-person communication (including pedestrians, cyclists, drivers, or passengers); V2I refers to vehicle to network device communication, such as RSU, and another V2N may be included in V2I, V2N refers to vehicle to base station/network communication.

Among them, the RSU includes two types: the RSU of the terminal type is in a non-mobile state because the RSU is distributed on the roadside, and the mobility does not need to be considered; the RSU, being of the base station type, can provide timing synchronization and resource scheduling to the vehicle with which it communicates.

5) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first identifier and the second identifier are used only for distinguishing different identifiers, and do not indicate the difference of the content, priority, importance, and the like of the two identifiers.

Having described some of the concepts related to the embodiments of the present application, the following describes features of the embodiments of the present application.

V2X is a key technology of the future intelligent transportation system. It enables communication between cars, between cars and base stations, and between base stations. Therefore, a series of traffic information such as real-time road conditions, road information, pedestrian information and the like is obtained, so that the driving safety is improved, the congestion is reduced, the traffic efficiency is improved, and the vehicle-mounted entertainment information is provided.

Referring to fig. 2, in the LTE system, a terminal device in a coverage area obtains a transmission configuration on a sidelink according to a configuration message sent by a base station through a Uu interface, so that the terminal device can broadcast to other terminal devices on the sidelink.

In the LTE system, the base station has two ways of controlling vehicle-to-vehicle communication via a sidelink: mode (mode)3 and mode 4.

mode3 can refer to FIG. 3. The base station transmits a dedicated resource (dedicated resource) including, for example, a dedicated sidelink transmission resource to a terminal device in a radio resource control-connected state (radio resource-connected) through a dedicated signaling (dedicated signal). The terminal equipment obtains the special side uplink sending resource carried by the special signaling, and can send data through the special side uplink sending resource. The terminal device in the RRC connected state may also send a request message to the base station, and the base station sends the dedicated resource to the terminal device through the dedicated signaling after receiving the request message.

mode4 can refer to FIG. 4. The base station transmits information of a resource pool (resource pool) for transmission on the sidelink, which includes, for example, a sidelink transmission resource pool (TXpool), a sidelink reception resource pool (RX pool), and a sidelink special transmission resource pool (explicit TXpool), to the terminal device through dedicated signaling or broadcast information. After the terminal device obtains the sidelink transmission resource pool, it can select resources from the sidelink transmission resource pool to transmit data. For the terminal device in the RRC connected state, the base station may send the information of the resource pool through dedicated signaling or broadcast information, and for the terminal device in the RRC idle state (idle), the base station may send the information of the resource pool through broadcast information. The broadcast information is, for example, a System Information Block (SIB) 21 or SIB 26. The terminal device in the RRC connected state may receive the resource pool configured by the base station through dedicated signaling, for example, the resource pool includes a sidelink receiving resource pool, a sidelink transmitting resource pool, and a sidelink special transmitting resource pool, and the terminal device in the RRC idle state may acquire the sidelink receiving resource pool, the sidelink transmitting resource pool, and the sidelink special transmitting resource pool by broadcasting SIB21 and SIB26 through the reading system.

The sidelink receiving resource pool is used for informing the terminal device on which resources signals need to be received on the sidelink. The sidelink sending resource pool is used for selecting resources from the sidelink sending resource pool for transmission when the terminal equipment transmits on the sidelink in the current cell. The special sidelink transmission resource pool is used for randomly selecting resources from the special sidelink transmission resource pool for transmission under some special conditions, such as cell switching, cell reselection, or link failure.

In the NR system, sidelink traffic is similarly mapped to mode1 and mode2, mode1 is controlled in a manner similar to mode3 in the LTE system, and mode2 is controlled in a manner similar to mode4 in the LTE system. And the side link traffic of the NR system may also be unicast to one end device or multicast to a group of end devices through the side link. For mode1 and mode3, the base station may allocate sidelink dedicated resources or sidelink resource pools to the terminal device for transmission by the terminal device, and for mode2 and mode4, the base station allocates sidelink resource pools to the terminal device for transmission by the terminal device. The sidelink dedicated resource is dedicated to the terminal device for transmission, the terminal device does not need to compete with other terminal devices, and does not need to perform resource selection again, and the sidelink resource pool may be used by a plurality of terminal devices, and the terminal device also needs to select resources from the sidelink resource pool.

When the terminal equipment selects resources from the sidelink transmission resource pool to perform sidelink transmission, the terminal equipment firstly performs sending on the sidelink transmission resource pool and acquires a sending result of the sidelink transmission resource pool. The sending refers to selecting the currently unoccupied resources in the sidelink transmission resource pool for transmission by listening the occupation condition of different resources in the sidelink transmission resource pool for a period of time, so as to reduce the probability of collision caused by simultaneously selecting one resource by different terminal devices. Therefore, when the sidelink transmission resource pool changes, the terminal device needs to send the changed sidelink transmission resource pool again. In order to reduce the transmission interruption caused by the terminal equipment waiting for the sending result, the base station usually provides a special sidelink transmission resource pool, and when the terminal equipment uses the resources in the special sidelink transmission resource pool, the terminal equipment only needs to randomly select the resources from the special sidelink transmission resource pool, and does not need to send the special sidelink transmission resource pool.

The system information is generally transmitted periodically, and the base station transmits information such as configuration to the terminal device through the system information. The base station may change certain configurations by changing current system information. Of course, the base station may not change the system information directly at any time, and the change of the system information is to be completed at the beginning of a modification period (modification period), and may not be changed in the whole modification period. When the base station wants to change the current system information, it needs to transmit a paging message for notifying the system information change and broadcast new system information in the next modification period. For an LTE cell, when any system information changes, the value tag (value tag) value in SIB1 is incremented by 1. In the LTE system, a value tag is included in the SIB1, and the value of the value tag is increased by 1 whenever any SIB is changed. For the NR cell, each SIB individually corresponds to a value tag value, that is, there is an array in the SIB1, which indicates which SIB has been changed by different value tags. When one SIB is changed, the value tag is incremented by 1. In the NR system, System Information (SI) of area specific (area specific) is also introduced, and an area identification number (ID) of the SI is set. When the area ID or the value tag in the system information changes, the base station sends a paging message to notify the system information change. The SI of the area specific corresponds to the value tag in the SIB1 in addition to the area ID. For the terminal device, in addition to determining whether the area ID has changed, it is also generally determined whether the value tag has changed, thereby determining whether the system information has changed.

For the terminal device, when a paging message of which the system information is to be changed is received in the current modification period, the changed system information is re-read in the next modification period, and the corresponding configuration provided by the new system information is applied. For a terminal device supporting a sidelink in an LTE system, when a sidelink transmission resource pool changes, the terminal device needs to use a special transmission resource pool provided by new system information before obtaining a sending result for a new sidelink transmission resource pool. And after the sending result of the new sidelink sending resource pool is obtained, the new sidelink sending resource pool is used for sending.

When the terminal equipment uses the special sending resource pool, sending is not needed, and the collision probability is higher, so that the transmission performance of the terminal equipment is reduced due to the use of the special sending resource pool. Moreover, if all the terminal devices are implemented according to this method, when the system information changes, all the terminal devices of the current cell use the special sending resource pool provided by the new system information, so that the collision probability is further increased, and the service performance is deteriorated when the system information changes.

In view of this, the technical solutions of the embodiments of the present application are provided. In this embodiment of the present application, if a first sidelink transmission resource indicated by the first system information is different from a second sidelink transmission resource indicated by the second system information, and the first sidelink transmission resource does not have a usable detection result, the terminal device may use the second sidelink transmission resource, which is equivalent to that the terminal device may continue to use an old sidelink transmission resource without using a sidelink special transmission resource, thereby improving the transmission performance of the terminal device.

The technical scheme provided by the embodiment of the application can be applied to sidelink scenarios, for example, device-to-device (D2D) scenarios, may be NR D2D scenarios, LTE D2D scenarios, and the like, or for example, V2X scenarios, may be NR V2X scenarios, LTE V2X scenarios, and the like. Or may be applied to other scenarios or other communication systems, and is not limited in particular.

The network architecture applied in the embodiments of the present application is described below. Please refer to fig. 5, which illustrates a network architecture applied in the present embodiment.

Fig. 5 includes a network device and two terminal devices, which are respectively a terminal device 1 and a terminal device 2, where both of the two terminal devices may be under the coverage of the network device, or the two terminal devices may only have the terminal device 1 under the coverage of the network device and the terminal device 2 not under the coverage of the network device, or the two terminal devices may also be under the coverage of different network devices. The two terminal devices can communicate with each other through sidelink. Fig. 5 takes as an example that both terminal devices are under the coverage of one network device shown in fig. 5. Wherein both terminal devices are V2X terminal devices. Of course, the number of terminal devices in fig. 5 is only an example, and in practical applications, the network device may provide services for a plurality of terminal devices.

The network device in fig. 5 is, for example, an access network device, such as a base station, or may also be an RSU, etc., and the base station is taken as an example in fig. 5. The access network device may correspond to different devices in different systems, for example, in a fourth generation mobile communication technology (4 th generation, 4G) system, the access network device may correspond to an eNB, and in a 5G system, the access network device in 5G, for example, a gNB.

The terminal device in fig. 5 is a vehicle-mounted terminal device or a vehicle as an example, but the terminal device in the embodiment of the present application is not limited thereto.

The technical solution provided by the embodiments of the present application is described below with reference to the accompanying drawings.

An embodiment of the present application provides a communication method, please refer to fig. 6, which is a flowchart of the method. In the following description, the method is applied to the network architecture shown in fig. 5 as an example. In addition, the method may be performed by two communication devices, e.g. a first communication device and a second communication device. The first communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, or may be other communication devices, such as a system on a chip. Similarly, the second communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, or may be other communication devices, such as a system on chip. The implementation manners of the first communication device and the second communication device are not limited, for example, the two communication devices may be implemented in the same form, for example, both are implemented in the form of a device, or the two communication devices may also be implemented in different forms, for example, the first communication device is implemented in the form of a device, the second communication device is implemented in the form of a system-on-chip, and so on. The network device is, for example, a base station.

For convenience of introduction, in the following, the method is performed by a network device and a terminal device as an example, that is, the first communication apparatus is a network device and the second communication apparatus is a terminal device as an example. Since this embodiment is applied to the network architecture shown in fig. 5 as an example, the network device described below may be the network device in the network architecture shown in fig. 5, and the terminal device described below may be the terminal device 1 or the terminal device 2 in the network architecture shown in fig. 5, and if the terminal device described below is the terminal device 1 in the network architecture shown in fig. 5, the other terminal device described below may be the terminal device 2 in the network architecture shown in fig. 5, or if the terminal device described below is the terminal device 2 in the network architecture shown in fig. 5, the other terminal device described below may be the terminal device 1 in the network architecture shown in fig. 5.

S61, the network device sends the second system information, and the terminal device receives the second system information from the network device.

The second system information may indicate the sidelink resource, for example, the sidelink resource indicated by the second system information is referred to as a second sidelink resource. In the embodiment of the present application, the sidelink resource includes, for example, a D2D resource or a V2X resource, and the like, which is not limited specifically.

The sidelink resources may be dedicated resources, e.g., including dedicated transmit resources, or dedicated receive resources, or both. Alternatively, the sidelink resource may be a resource pool, for example, including at least one of a sidelink transmission resource pool, a sidelink reception resource pool, or a sidelink specific transmission resource pool. In the following, the sidelink transmission resource may refer to a sidelink transmission resource pool, for example, the first sidelink transmission resource may refer to a first sidelink transmission resource pool, or the sidelink transmission resource may also refer to a dedicated resource or other resources. Similarly, the special sidelink transmission resource may refer to a special sidelink transmission resource pool, for example, the first special sidelink transmission resource may refer to a special first sidelink transmission resource pool, or the special sidelink transmission resource may refer to a dedicated resource or other resources; the sidelink reception resource may refer to a sidelink reception resource pool, for example, the first sidelink reception resource may refer to a first sidelink reception resource pool, or the sidelink reception resource may also refer to a dedicated resource or other resources.

For example, the sidelink transmission resource indicated by the second system information is referred to as a second sidelink transmission resource, the sidelink reception resource indicated by the second system information is referred to as a second sidelink reception resource, and the sidelink special transmission resource indicated by the second system information is referred to as a second sidelink special transmission resource. The terminal device may use the sidelink resources indicated by the second system information after receiving the second system information, for example, including at least one of the second sidelink transmission resource, the second sidelink receiving resource, or the second sidelink specific transmission resource. For example, the terminal device may use the second sidelink transmission resource if data is to be transmitted on the sidelink after receiving the second system information. Of course, the terminal device needs to send the second sidelink transmission resource first, and after obtaining the sending result, the terminal device uses the second sidelink transmission resource again.

Of course, the second system information may indicate other configurations besides the sidelink resource, and is not limited in particular.

S62, the network device generates a first message.

As a first implementation of the first message, the first message may indicate whether a change of system information occurs.

For example, the first message is a paging message. When the system information changes, the paging message sent by the network device may carry 1 bit (bit) of information, and the 1 bit of information indicates that the system information changes. When the system information does not change, the paging message sent by the network device may not carry the information of the 1 bit. Therefore, the terminal device can determine whether the system information will change according to whether the received paging message carries the 1-bit information.

As another example, the first message is SIB 1. When the system information is changed, the value of the corresponding value tag in the SIB1 sent by the network device is increased by 1, and when the system information is not changed, the value of the corresponding value tag in the SIB1 sent by the network device is not changed. Therefore, the terminal device can determine whether the value of the value tag has changed by comparing the value of the value tag in the new SIB1 with the value of the value tag in the previously received SIB1, thereby determining whether the corresponding system information has changed.

As another example, the first message is SIB 1. The SIB1 carries an area ID, and when the area-specific system information is changed, the value of the area ID in the SIB1 may be changed, whereas when the system information is not changed, the value of the area ID of the SIB1 sent by the network device may be unchanged. Therefore, the terminal device can determine whether the value of the area ID has changed by comparing the value of the area ID in SIB1 with the value of the area ID in SIB1 that was received before, thereby determining whether system information has changed.

For another example, the first message is an SIB corresponding to sidelink, and the SIB may carry an area ID. When the system information changes, the value of the area ID carried by the SIB sent by the network device changes, and when the system information changes, the value of the area ID carried by the SIB sent by the network device does not change. Therefore, the terminal device can determine whether the value of the area ID is changed by comparing the value of the area ID in the new SIB with the value of the area ID in the previously received SIB, thereby determining whether the system information is changed.

In this implementation of the first message, if the first message indicates that the system information is changed, the terminal device considers that the sidelink transmission resource is changed by implicitly indicating that the sidelink transmission resource is changed, and if the first message indicates that the system information is not changed, the terminal device considers that the sidelink transmission resource is not changed by implicitly indicating that the sidelink transmission resource is not changed.

Alternatively, as a second implementation manner of the first message, the first message may also indicate whether the sidelink transmission resource is changed when the system information is changed.

For example, the first message includes indication information that may indicate whether a change in sidelink transmission resources occurred when a change in system information occurred. For example, the indication information occupies one or more bits.

For example, if the first message is a paging message, the paging message itself may indicate whether system information may be changed, and in the embodiment of the present application, only the indication information is additionally added in the paging message. Then, if the paging message indicates that the system information is changed and the indication information indicates that the sidelink transmission resource is changed when the system information is changed, the terminal device may determine that the system information is changed, and when the system information is changed, the sidelink transmission resource is changed, so that the terminal device may determine that the first sidelink transmission resource is different from the second sidelink transmission resource, and the terminal device may read new system information in a next modification period and acquire the new sidelink transmission resource; or, if the paging message indicates that the system information does not change and the indication information indicates that the sidelink transmission resource does not change when the system information changes, or the paging message indicates that the system information does not change, the terminal device may determine that the system information does not change, so that the terminal device may determine that the first sidelink transmission resource is the same as the second sidelink transmission resource, and the terminal device may continue to use the second sidelink resource, for example, continue to use the second sidelink transmission resource, without reading new system information in a next modification period; or, the paging message indicates that the system information is changed, and the indication information indicates that the sidelink transmission resource is not changed when the system information is changed, the terminal device may determine that the system information is changed, and when the system information is changed, the sidelink transmission resource is not changed, so that the terminal device may determine that the first sidelink transmission resource is the same as the second sidelink transmission resource, and the terminal device may read new system information in a next modification period, but may continue to use the old sidelink transmission resource without acquiring the new sidelink transmission resource, for example, continue to use the second sidelink transmission resource.

If the first message carries the indication information, it indicates that the sidelink transmission resource will be changed when the system information is changed, and if the first message does not carry the indication information, it indicates that the sidelink transmission resource will not be changed when the system information is changed; or, if the first message does not carry the indication information, it indicates that the sidelink transmission resource will be changed when the system information is changed, and if the first message carries the indication information, it indicates that the sidelink transmission resource will not be changed when the system information is changed. In this case, the value of the indication information may be arbitrary, and the change of the sidelink transmission resource is mainly indicated by whether the indication information exists or not.

Or, no matter whether the sidelink transmission resource is changed when the system information is changed, the first message carries the indication information, in this case, the value of the indication information can be used to indicate whether the sidelink transmission resource is changed when the system information is changed. Take the example that the indication information occupies 1 bit. If the value of the 1 bit is '1', it indicates that the sidelink transmission resource is changed when the system information is changed, and if the value of the 1 bit is '0', it indicates that the sidelink transmission resource is not changed when the system information is changed; or, if the value of the 1 bit is "1", it indicates that the sidelink transmission resource will not be changed when the system information is changed, and if the value of the 1 bit is "0", it indicates that the sidelink transmission resource will be changed when the system information is changed.

Whether the instruction sidelink sending resources are changed or not is displayed through the instruction information, and the instruction mode is clear. For example, the first message is a paging message, and in the embodiment of the present application, indication information may be additionally added to the paging message to display whether the indication sidelink transmission resource is changed. Or the first message may also be multiplexed with other existing messages, or the first message may also be a dedicated message provided in the embodiments of the present application, and is not limited specifically.

Alternatively, as a third implementation manner of the first message, the first message may also indicate whether the sidelink transmission resource is changed when the system information is changed. In this implementation, the content indicated by the first message may be the same as that indicated in the second implementation of the first message, but the implementation of the first message is different.

For example, the first message may indicate whether the sidelink transmission resource is changed when the system information is changed by whether time information is included. When the first message contains time information, the first message indicates that sidelink transmission resources will change when system information changes, and when the first message does not contain time information, the first message indicates that sidelink transmission resources will not change when system information changes.

For example, if the first message is a paging message, the paging message itself indicates whether the system information may be changed, and the embodiment of the present application only adds time information in the paging message additionally. Then, if the paging message indicates that the system information is changed and the first message includes time information, the terminal device may determine that the system information is changed, and when the system information is changed, the sidelink transmission resource is changed, so that the terminal device may determine that the first sidelink transmission resource is different from the second sidelink transmission resource, and the terminal device may read new system information in a next modification period and acquire a new sidelink transmission resource; or, if the paging message indicates that the system information does not change and the first message does not include the time information, or the paging message indicates that the system information does not change, the terminal device may determine that the system information does not change, so that the terminal device may determine that the first sidelink transmission resource is the same as the second sidelink transmission resource, and the terminal device may continue to use the second sidelink resource, for example, the second sidelink transmission resource, without reading new system information in a next modification period; or, the paging message indicates that the system information may change, and the first message does not include time information, the terminal device may determine that the system information may change, and when the system information changes, the sidelink transmission resource may not change, so that the terminal device may determine that the first sidelink transmission resource is the same as the second sidelink transmission resource, and the terminal device may read new system information in a next modification period, but may not need to acquire a new sidelink transmission resource, but continue to use an old sidelink transmission resource, for example, use the second sidelink transmission resource.

The time information is, for example, information of a timer (timer), or information of the first time instant, or a time offset. The information of the timer comprises for example the duration of the timer, the first time may be an absolute time, for example the first time is 15:30:05, the time offset is for example a time offset relative to the start time of the next modification period, or may be a time offset relative to other times. The method of using the time information will be described later.

In a third implementation manner of the first message, the first message may implicitly indicate whether the sidelink transmission resource is changed when the system information is changed by whether the first message includes time information, and the time information may be further applied, so that the utilization rate of the information is improved.

S63, the network device sends a first message, and the terminal device receives the first message from the network device.

The network device may send the first message after generating the first message.

S64, the network device sends the first system information, and the terminal device receives the first system information from the network device.

The first system information may also indicate sidelink resources, for example, the sidelink resources indicated by the first system information are referred to as first sidelink resources. For example, the sidelink transmission resource indicated by the first system information is referred to as a first sidelink transmission resource, the sidelink reception resource indicated by the first system information is referred to as a first sidelink reception resource, and the sidelink specific transmission resource indicated by the first system information is referred to as a first sidelink specific transmission resource.

Of course, the first system information may indicate other configurations besides the sidelink resource, and is not limited specifically.

If the network device sends the first message, the embodiment of the application indicates that the system information is changed by the first message, or indicates that the sidelink transmission resource is changed when the system information is changed. The first system information is changed system information.

For example, the terminal device learns that the system information changes, or learns that the sidelink transmission resource changes when the system information changes, and then the terminal device receives the changed system information, that is, the first system information, in the next modification period.

Or, the terminal device does not know that the system information is changed, and only normally receives the first system information. For example, the network device did not send the first message, or the terminal device did not successfully receive the first message. Then, after receiving the first system information, the terminal device may compare the first sidelink resources with the second sidelink resources to determine whether the first sidelink resources and the second sidelink resources are the same. For example, the terminal device may compare the first sidelink transmission resource with the second sidelink transmission resource to determine whether they are the same. The embodiment of the present application takes the example that the terminal device determines that the first sidelink transmission resource is different from the second sidelink transmission resource.

Of course, in the case that the terminal device compares the sidelink resources by itself, the network device may not need to send the first message, and then neither S62 nor S63 need to be executed.

S64, when the first sidelink transmission resource is different from the second sidelink transmission resource, the terminal device uses the second sidelink transmission resource.

As can be seen from the foregoing description, if the first sidelink transmission resource is the same as the second sidelink transmission resource, the terminal device may continue to use the second sidelink transmission resource, which is not described herein again.

In this embodiment of the present application, if the first sidelink transmission resource is different from the second sidelink transmission resource, the terminal device may continue to use the second sidelink transmission resource, and may not use the first sidelink transmission resource temporarily, and naturally may not use the first sidelink special transmission resource provided by the first system information, so that the collision during resource selection may be reduced, and the transmission performance of the terminal device may be improved.

When the first sidelink transmission resource is different from the second sidelink transmission resource, the terminal device may perform probing on the first sidelink transmission resource and use the second sidelink transmission resource in the probing process. If the first message adopts the first implementation manner or the second implementation manner, the terminal device detects the first sidelink transmission resource, uses the second sidelink transmission resource in the detection process, and when the detection result of the first sidelink transmission resource is obtained, the terminal device starts to use the first sidelink transmission resource, or the terminal device uses the second sidelink transmission resource until the detection result of the first sidelink transmission resource is obtained, and the terminal device starts to use the first sidelink transmission resource. And the terminal device starts to use the first sidelink transmission resource and naturally stops using the second sidelink transmission resource.

Reference is made to fig. 7 for this. It can be seen that the terminal device can use the second sidelink transmission resource before the system information changes, or when the terminal device receives the second system information. When the system information changes, that is, when the terminal device receives the first system information, the terminal device may continue to use the second sidelink transmission resource, and during this process, the terminal device may probe the first sidelink transmission resource. The terminal device may start using the first sidelink transmission resource when acquiring the probing result of the first sidelink transmission resource.

In addition, before acquiring the probe result of the first sidelink transmission resource, the terminal device may use the entire configuration of the sidelink indicated by the second system information, that is, the terminal device uses the entire configuration of the sidelink indicated by the second system information such as the second sidelink reception resource in addition to the second sidelink transmission resource. After acquiring the probing result of the first sidelink transmission resource, the terminal device uses all configurations of the sidelink indicated by the first system information, that is, after acquiring the probing result of the first sidelink transmission resource, the terminal device stops using all configurations of the sidelink indicated by the second system information and uses all configurations of the sidelink indicated by the first system information instead. In this way, the terminal device can integrally replace the configuration related to the sidelink, and the implementation mode is simpler.

Alternatively, before acquiring the probing result of the first sidelink transmission resource, the terminal device may use only the second sidelink transmission resource indicated by the second system information, and for other configurations of the sidelink, use all the configurations indicated by the first system information. That is, before acquiring the probe result of the first sidelink transmission resource, the terminal device uses all configurations of the sidelink except for the first sidelink transmission resource among all configurations of the sidelink indicated by the first system information. And after acquiring the detection result of the first sidelink transmission resource, the terminal equipment uses the first sidelink transmission resource, and for other configurations of the sidelink, the terminal equipment continues to use the configuration indicated by the first system information. That is, after acquiring the detection result of the first sidelink transmission resource, the terminal device only needs to change the sidelink transmission resource. In this way, the corresponding configuration provided by the new system information can be applied as soon as possible.

Alternatively, before acquiring the probe result of the first sidelink transmission resource, the terminal device may use a part of the configuration indicated by the first system information in addition to the second sidelink transmission resource indicated by the second system information, and in addition, the terminal device may use the configuration indicated by the first system information. That is, before acquiring the probe result of the first sidelink transmission resource, the terminal device may use a remaining part of the configuration of the sidelink, except for the first sidelink transmission resource, among the entire configuration of the sidelink indicated by the first system information. For example, the terminal device may use the second sidelink transmission resources and the second sidelink reception resources indicated by the second system information, while for other configurations of the sidelink, the terminal device may use the content indicated by the first system information. In this way, the corresponding configuration provided by the new system information can be applied as soon as possible.

In the embodiment of the present application, before obtaining the detection result of the first sidelink transmission resource, the terminal device may continue to use the second sidelink transmission resource without using the first sidelink special transmission resource indicated by the first system information, thereby reducing the probability of collision when selecting the resource and improving the transmission performance of the terminal device. And because different terminal devices may acquire different sending times due to different capabilities, all terminal devices in a cell can equivalently use two sidelink resources within a period of time, and the collision between the terminal devices to the selected resources is reduced.

If the first message adopts the third implementation manner, that is, whether the sidelink transmission resource is changed when the system information is changed is indicated by whether the first message contains time information. Then, when the first sidelink transmission resource is different from the second sidelink transmission resource, the terminal device may have different implementation procedures, which are described separately below.

1. As a first implementation procedure of the terminal device, before the time indicated by the time information arrives, if the terminal device obtains a detection result of the first sidelink transmission resource, the terminal device uses the first sidelink transmission resource when obtaining the detection result of the first sidelink transmission resource. And when the time indicated by the time information arrives, if the terminal equipment does not acquire the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the terminal equipment uses the sidelink special transmission resource which is indicated by the first system information or indicated by the second system information.

If the time information is the information of the timer, the time indicated by the time information is the overtime time of the timer; or, if the time information is the information of the first time, the time indicated by the time information is the first time; alternatively, if the time information is a time offset, for example, the time offset is a time offset from the next modification period, the time indicated by the time information refers to a time at which the time difference from the next modification period is equal to the time offset. For example, the time information is a time offset relative to the next modification period, for example, the time offset is 5ms, and at the second time instant, the time difference with the next modification period is 5ms, then the time instant indicated by the time information is the second time instant.

If the time information is information of a timer, the information of the timer may be configured by the network device or may be specified by a protocol. For example, the information of the timer includes a duration of the timer, and the duration of the timer may be determined according to a time required for sending by the plurality of terminal devices, or may be determined according to other factors, which is not limited specifically.

In addition, the terminal device may start the timer at the beginning of a modification period, for example, when the terminal device receives the first message carrying the information of the timer, it is exactly when one modification period begins, the terminal device may start the timer when receiving the first message, or, if the time when the terminal device receives the first message carrying the information of the timer is within one modification period, the terminal device may wait until the beginning of the next modification period to start the timer. If the timer is started in this way, the network device may also maintain the timer with the same duration as the terminal device, and the network device may start the timer with the terminal device synchronously, which is convenient for unified network management.

Or, the terminal device may start the timer after receiving or reading the new system information, for example, the terminal device receives the first message first, where the first message carries information of the timer, and then the terminal device receives the first system information, so that the terminal device may start the timer when receiving the first system information or after receiving the first system information. If this is the case, the network device may not have a way to maintain the timer in synchronization with the terminal device because the network device may not know when the terminal device will read the first system information, e.g., the terminal device may fail to read the first system information when the network device transmits the first system information for the first time and succeed when the network device transmits the first system information for the second time, which the network device has no way to control.

Or, the terminal device may start the timer when receiving the first message carrying the information of the timer, or after receiving the first message, where the starting manner is relatively timely.

The embodiment of the present application is not limited to when the terminal device starts the timer.

Take the example that the time information is the information of the timer. After receiving the first system information, the terminal device may start a timer, where a duration of the timer is a duration indicated by the time information. If the terminal device obtains the probing result of the first sidelink transmission resource before the timer is over time, the terminal device may start to use the first sidelink transmission resource when obtaining the probing result of the first sidelink transmission resource. Because the time for obtaining the detection result may be different for different terminal devices, with this implementation, the terminal device may use the first sidelink transmission resource when obtaining the detection result of the first sidelink transmission resource, so that the time for using the first sidelink transmission resource may be different for different terminal devices, and the probability of collision when selecting the resource due to the fact that a plurality of terminal devices use the first sidelink transmission resource at the same time may also be reduced. In addition, the terminal device may also stop the timer when acquiring the detection result of the first sidelink transmission resource, and at this time, the timer may just time out or may not yet time out. Furthermore, since the first sidelink transmission resource is used, it indicates that the terminal device stops using the second sidelink transmission resource.

Reference is made to fig. 8A for this. It can be seen that the terminal device can use the second sidelink transmission resource before the system information changes, or when the terminal device receives the second system information. When the system information changes, that is, when the terminal device receives the first system information, the terminal device may continue to use the second sidelink transmission resource, and during this process, the terminal device may probe the first sidelink transmission resource. When the detection result of the first sidelink transmission resource is obtained, the timer is not overtime, and the terminal device can start to use the first sidelink transmission resource. Under the condition, the terminal equipment does not need to use special transmitting resources of a sidelink, thereby reducing the collision probability and improving the transmission performance of the terminal equipment. And because different terminal devices have different capabilities, the time for acquiring the detection result may be different, and all terminal devices in the cell can use two sidelink resources within a period of time, thereby reducing the collision between the terminal devices to the selected resource.

However, it is highly likely that the terminal device has not acquired the probe result of the first sidelink transmission resource when the timer times out. If this is the case, the terminal device may start using the sidelink specific transmission resource, which may be a first sidelink specific transmission resource indicated by the first system information or may be a second sidelink specific transmission resource indicated by the second system information. Now that the sidelink specific transmission resource is used, this indicates that the terminal device stops using the second sidelink transmission resource. Certainly, the terminal device may further continue to detect the first sidelink transmission resource in the process of using the sidelink special transmission resource, and when the detection result of the first sidelink transmission resource is obtained, the terminal device may stop using the sidelink special transmission resource and start using the first sidelink transmission resource, so as to reduce the collision probability.

Reference may be made to fig. 8B for this. As can be seen in fig. 8B, the terminal device may use the second sidelink transmission resource before the system information changes, or when the terminal device receives the second system information. When the system information changes, that is, when the terminal device receives the first system information, the terminal device may continue to use the second sidelink transmission resource, and during this process, the terminal device may probe the first sidelink transmission resource. When the timer times out, the terminal device has not obtained the detection result of the first sidelink transmission resource, so the terminal device can start to use the sidelink special transmission resource. And in the process that the terminal equipment uses the special side-link transmission resource, the terminal equipment continues to detect the first side-link transmission resource. The terminal device may start using the first sidelink transmission resource when acquiring the probing result of the first sidelink transmission resource.

The system information changes, and besides the sidelink resources may change, other configurations may also change, so the terminal device needs to apply the new configuration provided by the new system information as soon as possible. Moreover, the old sidelink resource is likely to be time-efficient, for example, the network device has indicated the new sidelink resource through the new system information, the old sidelink resource is likely to fail after a period of time, and if the terminal device applies the old sidelink resource for a long time, the terminal device may fail to transmit. Therefore, in the embodiment of the present application, time information is specified for the terminal device, and when the time indicated by the time information arrives, the terminal device may stop using the second sidelink transmission resource and start using the first sidelink transmission resource or the sidelink special transmission resource regardless of whether the terminal device obtains the detection result of the first sidelink transmission resource, so as to improve the transmission success rate of the terminal device.

In addition, after receiving the first system information, and before using the first sidelink transmission resource or before using the sidelink specific transmission resource, the terminal device may use the entire configuration of the sidelink indicated by the second system information, that is, the terminal device uses the entire configuration of the sidelink indicated by the second system information such as the second sidelink reception resource in addition to the second sidelink transmission resource. After acquiring the probing result of the first sidelink transmission resource, the terminal device uses all configurations of the sidelink indicated by the first system information, that is, after acquiring the probing result of the first sidelink transmission resource, the terminal device stops using all configurations of the sidelink indicated by the second system information and uses all configurations of the sidelink indicated by the first system information instead. In this way, the terminal device can integrally replace the configuration related to the sidelink, and the implementation mode is simpler.

2. As a second implementation procedure of the terminal device, the terminal device obtains the detection result of the first sidelink transmission resource before the time indicated by the time information arrives, and the terminal device uses the first sidelink transmission resource when the time indicated by the time information arrives. Since the first sidelink transmission resource is used, the second sidelink transmission resource is naturally stopped. And when the time indicated by the time information arrives, if the terminal equipment does not acquire the detection result of the first sidelink transmission resource, the terminal equipment uses the sidelink special transmission resource when the time indicated by the time information arrives, wherein the sidelink special transmission resource is indicated by the first system information or indicated by the second system information. Since the sidelink specific transmission resource is used, the second sidelink transmission resource is naturally not used.

Regarding the explanation of the time information, the explanation of the information on the timer, and the introduction of the contents such as the starting time of the timer, reference may be made to the relevant contents in the first implementation of the terminal device.

Reference is made to fig. 9A for this. It can be seen that the terminal device can use the second sidelink transmission resource before the system information changes, or when the terminal device receives the second system information. When the system information changes, that is, when the terminal device receives the first system information, the terminal device may continue to use the second sidelink transmission resource, and during this process, the terminal device may probe the first sidelink transmission resource. When the timer has not timed out when acquiring the detection result of the first sidelink transmission resource, the terminal device may continue to use the second sidelink transmission resource, and when the timer times out, the terminal device starts to use the first sidelink transmission resource. Under the condition, the terminal equipment does not need to use special transmitting resources of a sidelink, thereby reducing the collision probability and improving the transmission performance of the terminal equipment.

Reference is made to fig. 9B for this. As can be seen in fig. 9B, the terminal device may use the second sidelink transmission resource before the system information changes, or when the terminal device receives the second system information. When the system information changes, that is, when the terminal device receives the first system information, the terminal device may continue to use the second sidelink transmission resource, and during this process, the terminal device may probe the first sidelink transmission resource. When the timer times out, the terminal device has not obtained the detection result of the first sidelink transmission resource, so the terminal device can start to use the sidelink special transmission resource. And in the process that the terminal equipment uses the special side-link transmission resource, the terminal equipment continues to detect the first side-link transmission resource. The terminal device may start using the first sidelink transmission resource when acquiring the probing result of the first sidelink transmission resource.

By the method provided by the embodiment of the application, the terminal equipment can know whether the sidelink sending resource changes when the system information changes, the terminal equipment does not need to identify, and the complexity of the terminal equipment is reduced. Moreover, if the sidelink transmission resource is changed, the terminal device can adopt the sidelink transmission resource which is currently used, and does not need to use a new sidelink special transmission resource, so that the collision probability when selecting the resource can be reduced, and the communication quality of the terminal device can be improved.

The following describes an apparatus for implementing the above method in the embodiment of the present application with reference to the drawings. Therefore, the above contents can be used in the subsequent embodiments, and the repeated contents are not repeated.

The embodiment of the application provides a first communication device, for example, a first communication device. Referring to fig. 10, the communication device is, for example, a communication device 1000. The communication apparatus 1000 may be a communication device, or the communication apparatus 1000 may be a chip provided in the communication device. The communication apparatus 1000 can implement the functions of the terminal device mentioned above. The communication device may exemplarily be a terminal device as described above. The communication device 1000 may include a processor 1001 and a transceiver 1002. Among other things, the processor 1001 may be used to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver 1002 may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

A transceiver 1002 for transmitting resources using a second sidelink;

a transceiver 1002 for receiving first system information from a network device;

a processor 1001 configured to use the second sidelink transmission resource by the communication apparatus 1000 when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource.

In one possible implementation, the transceiver 1002 is further configured to:

In a possible embodiment, the time information is configuration information of a timer, or information of a first time instant, or a time offset.

In a possible implementation, the processor 1001 is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

In one possible implementation, the processor 1001 is configured to enable the communications apparatus 1000 to use the second sidelink transmission resource by:

the processor 1001 causes the communications apparatus 1000 to probe the first sidelink transmission resource and causes the communications apparatus 1000 to continue to use the second sidelink transmission resource before acquiring the probe result; or the like, or, alternatively,

the processor 1001 causes the communication apparatus 1000 to use the second sidelink transmission resource until the communication apparatus 1000 acquires a probe result of the first sidelink transmission resource.

In one possible embodiment of the method according to the invention,

if the processor 1001 causes the communication apparatus 1000 to acquire the probe result of the first side uplink transmission resource before the time indicated by the time information arrives, the processor 1001 causes the communication apparatus 1000 to use the first side uplink transmission resource when acquiring the probe result of the first side uplink transmission resource; or the like, or, alternatively,

if the communications apparatus 1000 does not acquire the detection result of the first sidelink transmission resource when the time indicated by the time information arrives, the processor 1001 causes the communications apparatus 1000 to use a sidelink special transmission resource indicated by the first system information or indicated by the second system information when the time indicated by the time information arrives.

In one possible embodiment of the method according to the invention,

if the processor 1001 causes the communication apparatus 1000 to acquire the detection result of the first sidelink transmission resource before the arrival of the time indicated by the time information, the processor 1001 causes the communication apparatus 1000 to use the first sidelink transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

In one possible implementation, after the transceiver 1002 receives the first system information and before the processor 1001 causes the communications apparatus 1000 to use the first sidelink transmission resource or before the processor 1001 causes the communications apparatus 1000 to use the sidelink specific transmission resource, the processor 1001 is further configured to cause the communications apparatus 1000 to:

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Embodiments of the present application provide a second communication device, which is, for example, a second communication device. Illustratively, the communication apparatus may be a communication device, or the communication apparatus may also be a chip provided in the communication device. The communication device may implement the functionality of the terminal device referred to above. The communication device may exemplarily be a terminal device as described above. The communication device may include a processor and a transceiver. Wherein the processor may be configured to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The drawings of the communication device may continue with reference to fig. 10, that is, the communication device may be a communication device 1000, the processor may be a processor 1001, and the transceiver may be a transceiver 1002. Wherein two communication devices share a single figure, it is not meant that the two communication devices are the same communication device, but include similar types of components, and are therefore represented by a single figure.

A processor 1001 configured to cause the communication apparatus 1000 to transmit resources using a second sidelink;

a processor 1001, configured to enable the communication device 1000 to probe the first sidelink transmission resource when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource and the first sidelink transmission resource has no available probing result, and further enable the communication device 1000 to continue to use the second sidelink transmission resource during the probing process.

In one possible implementation, the transceiver 1002 is further configured to:

In one possible implementation, the processor 1001 is configured to enable the communication device 1000 to probe the first sidelink transmission resource, and the processor 1001 enables the communication device 1000 to continue using the second sidelink transmission resource during the probing by:

the processor 1001 causes the communications apparatus 1000 to probe the first sidelink transmission resource and causes the communications apparatus 1000 to continue to use the second sidelink transmission resource before acquiring the probe result; or

The processor 1001 enables the communication device 1000 to use the second sidelink transmission resource and enables the communication device 1000 to perform sounding on the first sidelink transmission resource until a sounding result of the first sidelink transmission resource is obtained.

In one possible embodiment of the method according to the invention,

before the time indicated by the time information arrives, the communication apparatus 1000 acquires the detection result of the first side link transmission resource, and the processor 1001 causes the communication apparatus 1000 to use the first side link transmission resource when acquiring the detection result of the first side link transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication apparatus 1000 does not obtain the detection result of the first sidelink transmission resource, the transceiver 1002 uses a sidelink special transmission resource when the time indicated by the time information arrives, where the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information indicating the second sidelink transmission resource.

In one possible embodiment of the method according to the invention,

if the communication apparatus 1000 obtains the detection result of the first sidelink transmission resource before the time indicated by the time information arrives, the processor 1001 causes the communication apparatus 1000 to use the first sidelink transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

if the communications apparatus 1000 does not obtain the detection result of the first sidelink transmission resource when the time indicated by the time information arrives, the processor 1001 causes the communications apparatus 1000 to use a sidelink special transmission resource when the time indicated by the time information arrives, the sidelink special transmission resource being indicated by the first system information or being indicated by second system information, the second system information being system information indicating the second sidelink transmission resource.

The embodiment of the present application provides a third communication device, which is, for example, a third communication device. Illustratively, the communication apparatus may be a communication device, or the communication apparatus may also be a chip provided in the communication device. The communication device may implement the functionality of the terminal device referred to above. The communication device may exemplarily be a terminal device as described above. The communication device may include a processor and a transceiver. Wherein the processor may be configured to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The drawings of the communication device may continue with reference to fig. 10, that is, the communication device may be a communication device 1000, the processor may be a processor 1001, and the transceiver may be a transceiver 1002. Wherein two communication devices share a single figure, it is not meant that the two communication devices are the same communication device, but include similar types of components, and are therefore represented by a single figure.

A transceiver 1002 for receiving a first message from a network device;

a processor 1001, configured to determine, according to the first message, whether a sidelink transmission resource changes when system information changes.

In one possible embodiment of the method according to the invention,

In one possible embodiment, processor 1001 is configured to determine, based on the first message, that a change in sidelink transmission resources occurred when a change in system information occurred,

transceiver 1002 is further configured to read new system information, processor 1001 is further configured to enable communications apparatus 1000 to probe a first transmission resource pool, and processor 1001 is further configured to enable communications apparatus 1000 to continue to use a second transmission resource pool before acquiring a probe result, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by communications apparatus 1000 before the system information is changed.

In one possible implementation, after transceiver 1002 reads the new system information and before communications apparatus 1000 obtains the probe result, processor 1001 is further configured to cause communications apparatus 1000 to:

In one possible embodiment of the method according to the invention,

the transceiver 1002 is further configured to read new system information, the processor 1001 is further configured to enable the communications apparatus 1000 to probe for a first sidelink transmission resource, and the processor 1001 is further configured to enable the communications apparatus 1000 to continue to use a second sidelink transmission resource, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the communications apparatus 1000 before the system information is changed;

if the communications apparatus 1000 obtains the proposed result of the first sidelink transmission resource before the time indicated by the time information arrives, the processor 1001 is further configured to enable the communications apparatus 1000 to use the first sidelink transmission resource when obtaining the probing result of the first sidelink transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communications apparatus 1000 does not obtain the detection result of the first sidelink transmission resource, when the timer times out, the processor 1001 is further configured to enable the communications apparatus 1000 to use a sidelink special transmission resource, where the sidelink special transmission resource is a sidelink special transmission resource before the system information is not changed or a sidelink special transmission resource provided by the new system information.

the transceiver 1002 is further configured to read new system information, the processor 1001 is further configured to enable the communication apparatus 1000 to probe for a first sidelink transmission resource, and the processor 1001 is further configured to enable the communication apparatus 1000 to continue using a second sidelink transmission resource;

if the communications apparatus 1000 obtains the detection result of the first sidelink transmission resource before the time indicated by the time information arrives, the processor 1001 is further configured to enable the communications apparatus 1000 to use the first sidelink transmission resource when the timer times out; or the like, or, alternatively,

In one possible implementation, the transceiver 1002 is further configured to, after reading the new system information and before the processor 1001 is further configured to cause the communications apparatus 1000 to use the first sidelink transmission resource or the processor 1001 is further configured to cause the communications apparatus 1000 to use the sidelink specific transmission resource:

In one possible embodiment, processor 1001 is configured to determine, according to the first message, that the sidelink transmission resource is not changed when the system information is changed, transceiver 1002 is further configured to read new system information, and processor 1001 is further configured to enable communication apparatus 1000 to use a second sidelink transmission resource, where the second sidelink transmission resource is used by communication apparatus 1000 before the system information is changed.

The embodiment of the present application provides a fourth communication device, which is, for example, a fourth communication device. Illustratively, the communication apparatus may be a communication device, or the communication apparatus may also be a chip provided in the communication device. The communication device may implement the functionality of the network apparatus referred to above. Illustratively, the communication device may be a network device as described above. The communication device may include a processor and a transceiver. Wherein the processor may be configured to perform S62 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The drawings of the communication device may continue with reference to fig. 10, that is, the communication device may be a communication device 1000, the processor may be a processor 1001, and the transceiver may be a transceiver 1002. Wherein two communication devices share a single figure, it is not meant that the two communication devices are the same communication device, but include similar types of components, and are therefore represented by a single figure.

A processor 1001, configured to generate a first message, where the first message is used to indicate whether a sidelink transmission resource changes when system information changes;

a transceiver 1002 for transmitting the first message.

In a possible implementation, the first message includes indication information indicating whether a change in sidelink transmission resources occurs when system information changes.

In one possible embodiment of the method according to the invention,

In a simple embodiment, those skilled in the art can also realize several communication devices as described above by the structure of the communication device 1100 shown in fig. 11A. The communication apparatus 1100 may implement the functions of the terminal device or the network device referred to above. The communication device 1100 may include a processor 1101.

Where the communications apparatus 1100 is used to implement the functions of the terminal device referred to above, the processor 1101 may be configured to execute S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein; alternatively, when the communications apparatus 1100 is used to implement the functionality of the network devices referred to above, the processor 1101 may be used to execute S62 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

The communication apparatus 1100 may be implemented by a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Micro Controller Unit (MCU), or a programmable controller (PLD) or other integrated chips, and the communication apparatus 1100 may be disposed in the terminal device or the network device of the embodiment of the present application, so that the terminal device or the first network device implements the method of the embodiment of the present application.

In an alternative implementation, the communications apparatus 1100 may include a transceiver component for communicating with other devices. Where the communications apparatus 1100 is used to implement the functionality of a terminal device or a network device as referred to above, the transceiving components may be used to perform S61, S63 and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

In an alternative implementation, the communication device 1100 may further include a memory 1102, see fig. 11B, wherein the memory 1102 is configured to store computer programs or instructions, and the processor 1101 is configured to decode and execute the computer programs or instructions. It will be appreciated that these computer programs or instructions may comprise the functional programs of the terminal devices or network devices described above. When the functional program of the terminal device is decoded and executed by the processor 1101, the terminal device can be enabled to implement the functions of the terminal device in the method provided by the embodiment shown in fig. 6 in the present application. When the functional program of the network device is decoded and executed by the processor 1101, the network device can be enabled to implement the functions of the network device in the method provided by the embodiment shown in fig. 6 in the present application.

In another alternative implementation, the functional programs of these terminal devices or network devices are stored in a memory external to the communication apparatus 1100. When the terminal device function program is decoded and executed by the processor 1101, part or all of the contents of the terminal device function program are temporarily stored in the memory 1102. When the functional program of the network device is decoded and executed by the processor 1101, part or all of the content of the functional program of the network device is temporarily stored in the memory 1102.

In an alternative implementation, the functional programs of these terminal devices or network devices are located in a memory 1102 stored inside the communication apparatus 1100. When the memory 1102 inside the communication apparatus 1100 stores a function program of the terminal device, the communication apparatus 1100 may be provided in the terminal device of the embodiment of the present application. When the memory 1102 inside the communication apparatus 1100 stores a function program of a network device, the communication apparatus 1100 may be provided in the network device of the embodiment of the present application.

In yet another alternative implementation, some of the contents of the functional programs of these terminal devices are stored in a memory external to communications apparatus 1100, and other contents of some of the functional programs of these terminal devices are stored in a memory 1102 internal to communications apparatus 1100. Alternatively, a part of the contents of the function programs of these network devices may be stored in a memory external to communication apparatus 1100, and the other part of the contents of the function programs of these network devices may be stored in memory 1102 internal to communication apparatus 1100.

In the embodiment of the present application, the communication apparatus 1000 and the communication apparatus 1100 may be presented in a form of dividing each functional module according to each function, or may be presented in a form of dividing each functional module in an integrated manner. As used herein, a "module" may refer to an ASIC, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other components that provide the described functionality.

In addition, the first communication device as described above may be implemented in other forms. The communication device comprises, for example, a processing module and a memory module. Optionally, the communication device may further include a transceiver module. For example, the processing module may be implemented by the processor 1001 and the transceiver module may be implemented by the transceiver 1002. Among other things, the processing module may be used to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver module may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

A transceiver module for transmitting resources using a second sidelink;

the receiving and sending module is also used for receiving first system information from the network equipment;

a processing module, configured to enable the communication device to use the second sidelink transmission resource when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource.

In one possible embodiment, the transceiver module is further configured to:

In a possible implementation, the processing module is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource, and determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

In one possible embodiment, the processing module is configured to cause the communication device to use the second sidelink transmission resource by:

a processing module causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or the like, or, alternatively,

the processing module causes the communication device to use the second sidelink transmission resource until a probing result of the first sidelink transmission resource is obtained.

In one possible embodiment of the method according to the invention,

when the time indicated by the time information arrives, if the communication device does not acquire the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the processing module enables the communication device to use a sidelink special transmission resource, wherein the sidelink special transmission resource is indicated by the first system information or indicated by the second system information.

In one possible embodiment of the method according to the invention,

In one possible implementation, after the transceiver module receives the first system information and before the processing module causes the communication device to use the first sidelink transmission resource or causes the communication device to use the sidelink specific transmission resource, the processing module is further configured to cause the communication device to:

The second communication means as described above may also be implemented in other forms. The communication device comprises, for example, a processing module and a memory module. Optionally, the communication device may further include a transceiver module. For example, the processing module may be implemented by the processor 1001 and the transceiver module may be implemented by the transceiver 1002. Among other things, the processing module may be used to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver module may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

A processing module to cause the communications apparatus to transmit resources using a second sidelink;

when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource and the first sidelink transmission resource has no available detection result, the processing module is further configured to enable the communication device to detect the first sidelink transmission resource, and the processing module is further configured to enable the communication device to continue using the second sidelink transmission resource in a detection process.

In a possible implementation, the transceiver module is further configured to:

In one possible embodiment, the processing module is configured to cause the communication device to probe the first sidelink transmission resource, and the processing module causes the communication device to continue using the second sidelink transmission resource during probing by:

a processing module causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or

The processing module enables the communication device to use the second sidelink transmission resource, and the processing module enables the communication device to detect the first sidelink transmission resource until obtaining the detection result of the first sidelink transmission resource.

In one possible embodiment of the method according to the invention,

when the time indicated by the time information arrives, if the communication apparatus does not obtain the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the processing module enables the communication apparatus to use a sidelink special transmission resource, wherein the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information used for indicating the second sidelink transmission resource.

In one possible embodiment of the method according to the invention,

In one possible embodiment, after the transceiver module receives the first system information and before the processing module causes the communication device to use the first sidelink transmission resource or the sidelink specific transmission resource, the processing module is further configured to cause the communication device to:

The third communication means as described above may also be implemented in other forms. The communication device comprises, for example, a processing module and a memory module. Optionally, the communication device may further include a transceiver module. For example, the processing module may be implemented by the processor 1001 and the transceiver module may be implemented by the transceiver 1002. Among other things, the processing module may be used to perform S65 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver module may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

The receiving and sending module is used for receiving a first message from the network equipment;

In one possible embodiment of the method according to the invention,

In one possible implementation, the processing module is configured to determine, according to the first message, that a sidelink transmission resource is changed when system information is changed,

the transceiver module is further configured to read new system information, the processing module is further configured to enable the communication device to probe a first transmission resource pool, and the processing module is further configured to enable the communication device to continue to use a second transmission resource pool before acquiring a probe result, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the communication device before the system information is changed.

In a possible embodiment, after the transceiver module reads the new system information and before the communication apparatus obtains the detection result, the processing module is further configured to cause the communication apparatus to:

In one possible embodiment of the method according to the invention,

the transceiver module is further configured to read new system information, the processing module is further configured to enable the communication apparatus to detect a first sidelink transmission resource, and the processing module is further configured to enable the communication apparatus to continue to use a second sidelink transmission resource, where the first transmission resource pool is a sidelink transmission resource provided by the new system information, and the second transmission resource pool is a sidelink transmission resource used by the communication apparatus before the system information changes;

before the time indicated by the time information arrives, if the communication device obtains the proposed result of the first sidelink transmission resource, the processing module is further configured to enable the communication device to use the first sidelink transmission resource when the processing module is further configured to enable the communication device to obtain the detection result of the first sidelink transmission resource; or the like, or, alternatively,

the transceiver module is further configured to read new system information, the processing module is further configured to enable the communication device to probe a first sidelink transmission resource, and the processing module is further configured to enable the communication device to continue to use a second sidelink transmission resource;

before the time indicated by the time information arrives, if the communication apparatus obtains the detection result of the first sidelink transmission resource, when the timer is overtime, the processing module is further configured to enable the communication apparatus to use the first sidelink transmission resource; or the like, or, alternatively,

In one possible embodiment, the transceiver module, after reading the new system information and before the processing module causes the communication device to use the first sidelink transmission resource or before the processing module causes the communication device to use the sidelink specific transmission resource, the processing module is further configured to cause the communication device to:

In one possible implementation, the processing module is configured to determine, according to the first message, that the sidelink transmission resource does not change when the system information changes,

the transceiver module is further configured to read new system information, and the processing module is further configured to enable the communication device to use a second sidelink transmission resource, where the second sidelink transmission resource is a sidelink transmission resource used by the communication device before the system information is changed.

The fourth communication means as described above may also be implemented in other forms. The communication device comprises, for example, a processing module and a memory module. Optionally, the communication device may further include a transceiver module. For example, the processing module may be implemented by the processor 1001 and the transceiver module may be implemented by the transceiver 1002. Among other things, the processing module may be used to perform S62 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein. The transceiver module may be used to perform S61, S63, and S64 in the embodiment shown in fig. 6, and/or other processes for supporting the techniques described herein.

The system comprises a processing module, a sending module and a sending module, wherein the processing module is used for generating a first message, and the first message is used for indicating whether the side link sending resource changes when the system information changes;

and the transceiver module is used for transmitting the first message.

In one possible embodiment of the method according to the invention,

Since the communication apparatus 1000 and the communication apparatus 1100 provided in the embodiment of the present application can be used to execute the method provided in the embodiment shown in fig. 6, the technical effects obtained by the method can refer to the above method embodiment, and are not described herein again.

Embodiments of the present application are 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.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Versatile Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

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

Claims

1. A method of communication, comprising:

the terminal equipment uses the second side link to send resources;

the terminal equipment receives first system information from network equipment;

when the first sidelink sending resource indicated by the first system information is different from the second sidelink sending resource, the terminal equipment uses the second sidelink sending resource.

2. The method of claim 1, further comprising:

3. The method of claim 1, further comprising:

and the terminal equipment compares the first side link sending resource with the second side link sending resource and determines that the first side link sending resource is different from the second side link sending resource.

4. The method of claim 2, wherein the terminal device uses the second sidelink transmission resource, comprising:

and the terminal equipment uses the second side-link sending resource until the detection result of the first side-link sending resource is obtained.

5. The method of claim 2, further comprising:

6. The method of claim 2, further comprising:

7. The method of claim 5 or 6, wherein the terminal device, after receiving the first system information and before using the first sidelink transmission resource or using the sidelink specific transmission resource, further comprises:

8. A method of communication, comprising:

the network equipment generates a first message, wherein the first message is used for indicating whether the side link sending resource changes when the system information changes;

the network device sends the first message.

9. The method of claim 8,

the first message comprises indication information, and the indication information is used for indicating whether the sidelink transmission resource is changed when the system information is changed.

10. The method of claim 8,

11. The method of claim 10,

12. A communication device, comprising:

a transceiver for transmitting resources using a second sidelink;

the processor, coupled to the transceiver, causes the communication device to use the second sidelink transmission resource when the first sidelink transmission resource indicated by the first system information is different from the second sidelink transmission resource.

13. The communications device of claim 12, wherein the transceiver is further configured to:

14. The communications device of claim 12, wherein the processor is further configured to compare the first sidelink transmission resource with the second sidelink transmission resource to determine that the first sidelink transmission resource is different from the second sidelink transmission resource.

15. The communications device of claim 13, wherein the processor is configured to cause the communications device to use the second sidelink transmission resource by:

the processor causes the communication device to probe the first sidelink transmission resource and causes the communication device to continue to use the second sidelink transmission resource before acquiring a probe result; or the like, or, alternatively,

the processor causes the communication device to use the second sidelink transmission resource until the communication device obtains a probing result of the first sidelink transmission resource.

16. The communication device of claim 13,

before the time indicated by the time information arrives, if the communication device obtains the detection result of the first side link transmission resource, the processor enables the communication device to use the first side link transmission resource when obtaining the detection result of the first side link transmission resource; or the like, or, alternatively,

when the time indicated by the time information arrives, if the communication device does not obtain the detection result of the first sidelink transmission resource, when the time indicated by the time information arrives, the processor enables the communication device to use a sidelink special transmission resource, wherein the sidelink special transmission resource is indicated by the first system information or indicated by second system information, and the second system information is system information used for indicating the second sidelink transmission resource.

17. The communication device of claim 13,

before the time indicated by the time information arrives, if the communication device acquires the detection result of the first sidelink transmission resource, the processor enables the communication device to use the first sidelink transmission resource when the time indicated by the time information arrives; or the like, or, alternatively,

18. The communications device of claim 16 or 17, wherein after the transceiver receives the first system information and before the processor causes the communications device to use the first sidelink transmission resource or before the processor causes the communications device to use the sidelink specific transmission resource, the processor causes the communications device to:

19. A communication device, comprising:

the processor is used for generating a first message, wherein the first message is used for indicating whether the side link sending resource changes when the system information changes;

a transceiver for transmitting the first message.

20. The communication device of claim 19,

21. The communication device of claim 19,

22. The communication device of claim 21,

23. A communications apparatus comprising a memory and a processor coupled to each other, the memory configured to store instructions, and the processor configured to execute the instructions to perform the method of any of claims 1-7.

24. A communications apparatus comprising a memory and a processor coupled to each other, the memory configured to store instructions, and the processor configured to execute the instructions to perform the method of any of claims 8-11.

25. A communication system comprising a communication device according to any of claims 12 to 18 and a communication device according to any of claims 19 to 22.

26. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 7.

27. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 8 to 11.

28. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 7.

29. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 8 to 11.