WO2017132994A1

WO2017132994A1 - Information sending method, information reception method, uplink synchronization method, data sending instruction method, and device

Info

Publication number: WO2017132994A1
Application number: PCT/CN2016/073666
Authority: WO
Inventors: 华尧; 李明超; 韩广林; 曹振臻
Original assignee: 华为技术有限公司
Priority date: 2016-02-05
Filing date: 2016-02-05
Publication date: 2017-08-10

Abstract

An information sending method, an information reception method, an uplink synchronization method, a data sending instruction method and a device, for use in resolving the technical problem of waste of transmission resources caused when a base station allocates the transmission resources to an RSU. The information reception method comprises: a second terminal receives, through a device-to-device (D2D) link, first information that is sent by a first terminal device and used by the first terminal device, a first transmission resource being a resource allocated by an access network device where the first terminal device is located to the first terminal device, for transmitting data on D2D links of the first terminal device and other terminal devices, or the first transmission resource being a resource pre-allocated to the first terminal device, for transmitting data on the D2D links of the first terminal device and other terminal devices; and the second terminal device determines, according to the first information, whether the first transmission resource is a transmission resource capable of being selected by the second terminal device.

Description

Information transmission, reception, uplink synchronization, data transmission indication method and device

Technical field

The present invention relates to the field of mobile communications technologies, and in particular, to a method for transmitting, receiving, uplink, and transmitting data.

Background technique

When the vehicle to vehicle (V2V) link is not good, for example, when the UE is at the corner of the street, the user equipment (UE) can be pre-installed on the corner of the roadside unit (RSU). Receiving car network data transmitted by the UE through a Device to Device (D2D) method, and forwarding the received data to a network device such as a base station. In this transmission mode, the UE can transmit data to the base station without establishing a direct connection with the base station, which reduces the overhead of the base station maintaining the UE connection. For example, there are 100 vehicles in a cell, and 4 RSUs are deployed in the cell. At this time, the base station only needs to establish a connection with the four RSUs and maintain connection information with the four RSUs. It is necessary to communicate with these RSUs, and data can be forwarded to the base station through the four RSUs.

In addition, the RSU can also broadcast some important service information through the D2D link broadcast. For example, some traffic broadcast related information, such as broadcast traffic light information or speed limit card information, can be sent through the RSU, all within the RSU coverage. All vehicles can receive traffic information from the RSU.

It can be seen that the priority of the transmission resources used by the RSU is generally higher than the vehicle status information transmitted by the vehicle and the vehicle on the D2D link. Therefore, after the base station allocates transmission resources for one RSU, it will generally be allocated by broadcasting. The transmission resources of the RSU are broadcasted, so that after other UEs within the coverage of the base station receive the broadcast, the transmission resources are not used again to avoid collision with the data sent by the RSU. However, although this method can avoid collisions, it also causes waste of transmission resources.

Summary of the invention

The present application provides a method for transmitting, receiving, uplink, and transmitting data, and a device for solving the technical problem that the base station wastes transmission resources when allocating transmission resources for the RSU.

In a first aspect, a method for receiving information is provided, including:

Receiving, by the second terminal device, the first information sent by the first terminal device by using the D2D link, where the first information is used to indicate the first transmission resource, where the first transmission resource is the interface where the first terminal device is located a resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the network device to the first terminal device, or the first transmission resource is a pre-configured device of the first terminal device a resource for transmitting data on a D2D link of the first terminal device and other terminal devices;

The second terminal device determines, according to the first information, whether the first transmission resource is a transmission resource that is selectable by the second terminal device.

The first terminal device may send information about the transmission resource used by the first terminal device (for example, the transmission resource used by the first terminal device is referred to as the first transmission resource), so that other terminal devices that receive the information may not The first transmission resource is used again, thereby avoiding the occurrence of a collision situation. Moreover, the first terminal device sends the first information, and the coverage of the first terminal device is generally smaller than the coverage of the base station, and even if the first terminal device broadcasts the first information, the terminal device that receives the first information The number is generally smaller than the number of terminal devices broadcast by the receiving base station, and the terminal device that does not receive the first information sent by the first terminal device can continue to use the first transmission resource, thereby improving the utilization rate of the first transmission resource. Reduce waste of resources. Moreover, if the coverage of the first terminal device is greater than the communication range of the first terminal device, only the terminal device located outside the communication range of the first terminal device may not receive the first information, that is, the portion. The terminal device can use the first transmission resource, and at this time, it does not collide with the transmission of the first terminal device. That is, by adopting the technical solution of the present application, the utilization of resources is improved in the case of avoiding collision.

In conjunction with the first aspect, in a first possible implementation of the first aspect,

The first information includes mapping information, where the mapping information is used to indicate that, in the transmission resource broadcast by the access network device, the access network device allocates the first one to the first terminal device Transmitting a resource, where the first transmission resource is part of the transmission resource or all transmission resources; or

The first information includes a scheduling allocated resource location and a data resource location occupied by the first transmission resource.

The first information may include different information, so that the first transmission resource may be indicated in different manners, which is more flexible.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the second terminal device receives, by using the D2D link, the first sent by the first terminal device The first information used by the terminal device includes:

Receiving, by the second terminal device, the first information broadcast by the first terminal device by using the D2D link.

The first terminal device may send the first information by using a broadcast, and may send the first information to the plurality of second terminal devices by sending only one time, which saves transmission resources.

In conjunction with the first aspect or the first possible implementation of the first aspect, in a third possible implementation of the first aspect,

Before the second terminal device receives the first information used by the first terminal device that is sent by the first terminal device by using the D2D link, the method further includes:

Sending, by the second terminal device, the first request message for requesting to establish a connection to the first terminal device;

Receiving, by the second terminal device, the first information used by the first terminal device that is sent by the first terminal device by using the D2D link, including:

The second terminal device receives the first request response message sent by the first terminal device by using a D2D link, where the first request response message carries the first information.

The first terminal device may send the first information to the second terminal device when the second terminal device sends the first request message, so that if the second terminal device does not exist in the range covered by the first terminal device, the first terminal The device may save the transmission resource without sending the first information, and the first terminal device may send the first message when the second terminal device sends the first request message to the first terminal device. The information is such that the second terminal device can acquire the first information.

With reference to the first aspect or the first possible implementation of the first aspect to any one of the third possible implementation manners, in a fourth possible implementation manner of the first aspect, The method also includes:

And the second terminal device further receives, by using the D2D link, priority information of the service that is sent by the first terminal device by using the first transmission resource.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the second terminal device determines, according to the first information, whether the first transmission resource is optional Transmission resources, including:

Determining, by the second terminal device, the first transmission according to the priority information of the service performed by the first terminal device by using the first transmission resource and the priority information of the service performed by the second terminal device Whether the resource is an optional transmission resource.

The first terminal device may send the priority information of the service performed by the first terminal device through the first transmission resource, in addition to the first information, so that the second terminal device may pass the first transmission according to the first terminal device. The priority information of the service performed by the resource and the priority information of the service performed by the second terminal device to determine whether to select the first transmission resource, for example, the priority of the service performed by the first terminal device through the first transmission resource If the priority of the service performed by the second terminal device is higher, the second terminal device may not select the first transmission resource, that is, determine that the first transmission resource is an unselectable transmission resource, so as to avoid collision with the first terminal device. If the priority of the service performed by the first terminal device through the first transmission resource is lower than the priority of the service performed by the second terminal device, the second terminal device may select the first transmission resource, that is, determine the first transmission resource. As an optional transmission resource, in this way, it is possible to ensure that the service with higher priority can be prioritized Row.

With reference to the first aspect or the first possible implementation manner of the first aspect to the fifth possible implementation manner, in a sixth possible implementation manner of the first aspect, The method also includes:

Receiving, by the second terminal device, the second broadcast of the access network device where the second terminal device is located Instructing information, the second indication information is used to indicate that the second terminal device stops sending data to the first terminal device, or the second indication information is used to indicate that the second terminal device controls to send the a maximum amount of data of the first terminal device; the data includes data that is forwarded by the second terminal device to the access network device by using the first terminal device;

If the second indication information is used to indicate that the second terminal device stops sending data to the first terminal device, the second terminal device stops to the first according to the indication of the second indication information. The terminal device sends data; or, if the second indication information is used to indicate that the second terminal device controls the maximum amount of data sent to the first terminal device, the second terminal device according to the second indication The maximum amount of data indicated by the information controls the amount of data sent to the first terminal device.

If the amount of data forwarded to the access network device is too large, the uplink network may be caused by the access network device. In this case, the access network device may send the second indication information, so that the second terminal device can The second indication information controls the amount of data that is forwarded to the access network device by the first terminal device, saves uplink transmission resources, and avoids uplink congestion as much as possible, so as to ensure the normal progress of the communication process.

In a second aspect, a method for transmitting information is provided, including:

Transmitting, by the first terminal device, the first information used by the first terminal device by using a D2D link, where the first information is used to indicate a first transmission resource, and the first transmission resource is the first terminal device The access network device is the resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the first terminal device, or the first transmission resource is the first terminal device in advance. A resource for transmitting data on a D2D link of the first terminal device and other terminal devices configured.

The first terminal device may send information about the transmission resource used by the first terminal device (for example, the transmission resource used by the first terminal device is referred to as the first transmission resource), so that other terminal devices that receive the information may not The first transmission resource is used again, thereby avoiding the occurrence of a collision situation. Moreover, the first information is sent by the first terminal device, and the coverage of the first terminal device is generally smaller than the coverage of the base station, and the first information is received even if the first terminal device broadcasts the first information. The number of the terminal devices is generally smaller than the number of the terminal devices broadcasted by the receiving base station, and the terminal device that does not receive the first information sent by the first terminal device can continue to use the first transmission resource to maximize the first transmission resource. Utilization, reducing resource waste. Moreover, if the coverage of the first terminal device is greater than the communication range of the first terminal device, only the terminal device located outside the communication range of the first terminal device may not receive the first information, that is, the portion. The terminal device can use the first transmission resource, and at this time, it does not collide with the transmission of the first terminal device. That is, by adopting the technical solution of the present application, the utilization of resources is improved in the case of avoiding collision.

In conjunction with the second aspect, in a first possible implementation of the second aspect,

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcasted by the access network, the first transmission resource allocated by the access network device to the first terminal device The first transmission resource is a part of the transmission resource or all transmission resources of the transmission resource; or

With the second aspect or the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the first terminal device sends the first terminal device by using a D2D link The first information, including:

The first terminal device broadcasts the first information by using the D2D link.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

The first terminal device further broadcasts, by using the D2D link, priority information of a service that is transmitted by the first terminal device by using the first transmission resource.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, if the first transmission resource includes a pre-configured for the first terminal device The resource for transmitting data on the D2D link of the first terminal device and the other terminal device, before the first terminal device sends the first information used by the first terminal device by using the D2D link, the method further includes:

Transmitting, by the first terminal device, the first information to an access network device where the first terminal device is located, to instruct the access network device to stop allocating the first transmission resource to the access network Other terminal equipment within the coverage of the equipment;

Receiving, by the first terminal device, information about the second transmission resource sent by the access network device, to determine that the access network device has stopped allocating the second transmission resource to the coverage of the access network device The other terminal device; the second transmission resource is a part of the transmission resource or all the transmission resources included in the first transmission resource.

If the first transmission resource is a transmission resource configured by the first terminal device, the first terminal device may request the access network device to stop allocating the first transmission resource to other terminal devices, so as to avoid collision.

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

Before the first terminal device sends the first information used by the first terminal device by using the D2D link, the method further includes:

Receiving, by the first terminal device, a first request message sent by the second terminal device for requesting to establish a connection;

The first terminal device sends the first information used by the first terminal device by using a D2D link, including:

The first terminal device sends a first request response message to the second terminal device by using the D2D link, where the first request response message carries the first information.

With the fifth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the first request response message further, by the first terminal device, by using the first transmission resource Priority information for the business being conducted.

With reference to the second aspect or the first possible implementation manner of the second aspect, the possible implementation manner of the sixth possible implementation manner, in the seventh possible implementation manner of the second aspect, The method also includes:

Receiving, by the first terminal device, the first sent by the access network device where the first terminal device is located Instructing information, the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device, or the first indication information is used to indicate that the first terminal device controls forwarding to the The maximum amount of data of the access network device; the data includes data that is forwarded by the other terminal device to the access network device by using the first terminal device;

If the first indication information is used to indicate that the first terminal device stops sending data to the access network device, the first terminal device stops the access according to the indication of the first indication information. The network device sends data; or, if the first indication information is used to indicate that the first terminal device controls the maximum amount of data sent to the access network device, the first terminal device according to the first indication The maximum amount of data indicated by the information controls the amount of data sent to the access network device.

If the amount of data forwarded to the access network device is too large, the uplink network may be caused by the access network device. In this case, the access network device may send the first indication information, so that the first terminal device can The first indication information controls the amount of data forwarded to the access network device, saves uplink transmission resources, and avoids uplink congestion as much as possible, and tries to ensure the normal progress of the communication process.

The third aspect provides a data sending indication method, including:

The access network device determines that the amount of data forwarded to the access network device by the first terminal device is greater than or equal to a first threshold;

The access network device sends indication information, where the indication information is used to control the amount of data that the first terminal device forwards to the access network device.

If the amount of data forwarded to the access network device is too large, the uplink network may be caused by the access network device. In this case, the access network device may send the indication information, so that the first terminal device can be controlled to forward to the device. The amount of data on the access network device saves uplink transmission resources, and also avoids the situation of uplink congestion, and tries to ensure the normal progress of the communication process.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the access network device sends the indication information, including:

The access network device sends first indication information to the first terminal device, where the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device, or the first The indication information is used to indicate that the first terminal device controls the maximum number of forwarding to the access network device The data includes data that other terminal devices forward to the access network device through the first terminal device.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the access network device sends the indication information, including:

The access network device sends the second indication information to the terminal device in the coverage of the access network device, where the second indication information is used to indicate that the terminal device in the coverage of the access network device stops to the The first terminal device sends data, or the second indication information is used to indicate that the terminal device in the coverage of the access network device controls the maximum amount of data sent to the first terminal device; the data includes the The terminal device within the coverage of the network access device forwards data to the access network device by using the first terminal device.

The access network device can send indication information in different manners, so that different terminal devices can be instructed to achieve the effect of controlling the amount of uplink data, and the control mode is flexible, and can be selected according to actual needs.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner, in a third possible implementation manner of the third aspect, the method further includes:

The access network device receives the first information sent by the first terminal device; the first transmission resource includes a terminal-to-terminal D2D chain of the first terminal device and other terminal devices pre-configured for the first terminal device Resources for transmitting data on the road;

The access network device determines to stop allocating the second transmission resource to other terminal devices in the coverage of the access network device; the second transmission resource is part of the transmission resource or all transmissions included in the first transmission resource Resource

The access network device sends the information about the second transmission resource to the first terminal device.

If the first transmission resource is a transmission resource configured by the first terminal device, the first terminal device may request the access network device to stop allocating the first transmission resource to other terminal devices, so as to avoid collision. The access network device can notify the first terminal device of the result of the allocation, so that the first terminal device can know which transmission resources the access network device stops to allocate to other terminal devices, thereby facilitating the subsequent selection of the appropriate transmission by the first terminal device. Resources.

In a fourth aspect, a first uplink synchronization method is provided, including:

Transmitting, by the first terminal device, a second request message for requesting to establish a connection to the access network device where the first terminal device is located, where the second request message is used to indicate that the first terminal device is always in a static state Third indication information;

Receiving, by the first terminal device, condition information sent by the access network device;

The first terminal device determines, according to the condition information, whether the first terminal device has an uplink out-of-synchronization phenomenon.

If the first terminal device is a stationary terminal device deployed on the road, its uplink timing generally does not change. However, according to the prior art, the access network device still needs to continuously send uplink timing information for the first terminal device, which causes unnecessary signaling overhead. With the technical solution provided by the application, when the first terminal device sends the second request message to the access network device, the first terminal device can notify the access network device that the first terminal device will always be in a static state, and then the access network device only needs to go to the first A terminal device sends uplink timing information to save signaling overhead. In addition, the access network device may send condition information to the first terminal device, so that the first terminal device may determine whether the first terminal device has an uplink out-of-synchronization phenomenon, for example, if an uplink out-of-synchronization phenomenon occurs, the first terminal device The device can perform uplink synchronization with the access network device in time, so that, in the case of saving signaling overhead, uplink synchronization between the first terminal device and the access network device can be ensured as much as possible to avoid the first terminal device. The communication process with the access network device is affected.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, after the first terminal device determines, according to the condition information, whether the first terminal device has an uplink out-of-synchronization phenomenon, the method further includes:

If the first terminal device determines that the first terminal device has an uplink out-of-synchronization phenomenon according to the condition information, the first terminal device initiates an uplink synchronization process to perform uplink synchronization with the access network device. .

If the first terminal device determines that the uplink out-of-synchronization phenomenon occurs, the uplink synchronization process may be initiated, so that the uplink synchronization may be resumed with the access network device in time.

In combination with the fourth aspect or the first possible implementation of the fourth aspect, the second aspect of the fourth aspect In a possible implementation manner, the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate a signal received by the first terminal device from the access network device. The maximum time offset in the predetermined time range, the number of lost packets is used to indicate the maximum number of lost packets sent by the first terminal device to the access network device.

The condition information may include different contents, so that the first terminal device can perform judgment according to different condition information, and the manner is flexible.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, if the condition information includes the duration threshold, the first terminal device is configured according to the The condition information determines whether the first terminal device has an uplink out-of-synchronization phenomenon, including:

Determining, by the first terminal device, that the received time offset of the signal from the access network device is greater than or equal to the duration threshold;

The first terminal device determines that the first terminal device has an uplink out-of-synchronization phenomenon.

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, if the condition information includes the packet loss threshold, the first terminal device is configured according to The condition information determines whether the first terminal device has an uplink out-of-synchronization phenomenon, including:

The first terminal device determines that the number of lost packets sent to the access network device is greater than or equal to the threshold number of lost packets;

Two possible ways of judging the uplink out-of-synchronization are provided, and the first terminal device can select different judging processes according to different contents included in the condition information.

In a fifth aspect, a second uplink synchronization method is provided, including:

The access network device receives a second request message sent by the first terminal device for requesting to establish a connection; the second request message carries third indication information that is used to indicate that the first terminal device is always in a static state;

The access network device sends condition information to the first terminal device; the condition information is used to determine whether the first terminal device has an uplink out-of-synchronization phenomenon.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the condition information And including a duration threshold or a packet loss threshold; the duration threshold is used to indicate a maximum time offset of the signal received by the first terminal device from the access network device within a predetermined time range. The threshold of the number of lost packets is used to indicate the maximum number of lost packets sent by the first terminal device to the access network device.

With the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, after the access network device sends the condition information to the first terminal device, Also includes:

The access network device receives an uplink synchronization process initiated by the first terminal device to perform uplink synchronization with the first terminal device.

The access network device can receive the uplink synchronization process initiated by the first terminal device, so that the uplink synchronization is re-implemented with the first terminal device, so that the communication process between the first terminal device and the access network device can be performed normally.

In a sixth aspect, a first terminal device is provided, including:

a receiver, configured to receive first information sent by the first terminal device by using a D2D link, where the first information is used to indicate a first transmission resource, where the first transmission resource is where the first terminal device is located a resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the access network device to the first terminal device, or the first transmission resource is pre-configured by the first terminal device Resources for transmitting data on the D2D link of the first terminal device and other terminal devices;

And a processor, configured to determine, according to the first information, whether the first transmission resource is a transmission resource that is selectable by the second terminal device.

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

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcast by the access network device, the first transmission allocated by the access network device to the first terminal device a resource, the first transmission resource being a part of the transmission resource or all transmission resources of the transmission resource; or

The first information includes a scheduling allocation resource location and data resources occupied by the first transmission resource Source location.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the receiver is configured to:

Receiving, by the D2D link, the first information broadcast by the first terminal device.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the terminal device further includes a transmitter;

The transmitter is configured to: before the receiving, by the D2D link, the first information used by the first terminal device sent by the first terminal device, send, to the first terminal device, request to establish a connection. First request message;

The receiver is configured to: receive, by using a D2D link, a first request response message sent by the first terminal device, where the first request response message carries the first information.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, the possible implementation manner of the third possible implementation manner, in the fourth possible implementation manner of the sixth aspect, The receiver is also used to:

And receiving, by the D2D link, priority information of the service that is sent by the first terminal device by using the first transmission resource by the first terminal device.

In conjunction with the fourth possible implementation of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the processor is used to:

Determining, according to the priority information of the service performed by the first terminal device by using the first transmission resource, and the priority information of the service performed by the terminal device, whether the first transmission resource is an optional transmission resource .

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

The receiver is further configured to: receive second indication information that is broadcast by the access network device where the terminal device is located, where the second indication information is used to indicate that the terminal device stops sending data to the first terminal device, Or the second indication information is used to indicate that the terminal device controls a maximum amount of data sent to the first terminal device; the data includes that the terminal device passes the first terminal device Data forwarded to the access network device;

The processor is further configured to: if the second indication information is used to indicate that the terminal device stops sending data to the first terminal device, stopping to the first according to the indication of the second indication information Transmitting, by the terminal device, the data; or, if the second indication information is used to indicate that the terminal device controls the maximum amount of data sent to the first terminal device, according to the maximum data indicated by the second indication information The amount controls the amount of data sent to the first terminal device.

In a seventh aspect, a second terminal device is provided, including:

a transmitter, configured to send the first information used by the terminal device by using a D2D link, where the first information is used to indicate a first transmission resource, where the first transmission resource is a connection where the terminal device is located a resource for transmitting data on a D2D link of the terminal device and other terminal devices allocated by the network device to the terminal device, or the terminal device and other terminals pre-configured by the terminal device A resource that transfers data on the D2D link of the device.

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

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcasted by the access network, the first transmission resource allocated by the access network device to the terminal device. The first transmission resource is a part of the transmission resource or all transmission resources of the transmission resource; or

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the transmitter is configured to:

Broadcasting the first information through the D2D link.

In conjunction with the second possible implementation of the seventh aspect, in a third possible implementation manner of the seventh aspect, the transmitter is further configured to:

Transmitting priority information of the service transmitted by the terminal device by using the first transmission resource by using the D2D link.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a fourth possible implementation manner of the seventh aspect, the terminal device further includes a receiver; The resources for transmitting data on the D2D link of the terminal device and other terminal devices pre-configured for the terminal device are:

The transmitter is further configured to send the first information to an access network device where the terminal device is located before sending the first information used by the terminal device by using a D2D link, to indicate the connection The network access device stops allocating the first transmission resource to other terminal devices in the coverage of the access network device;

The receiver is configured to: receive information about a second transmission resource sent by the access network device, to determine that the access network device has stopped allocating the second transmission resource to a coverage of the access network device The other terminal device; the second transmission resource is a part of the transmission resource or all the transmission resources included in the first transmission resource.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a fifth possible implementation manner of the seventh aspect, the terminal device further includes a receiver;

The receiver is configured to receive, after the sender sends the first information used by the terminal device by using a D2D link, a first request message sent by the second terminal device for requesting to establish a connection;

The transmitter is configured to: send, by using the D2D link, a first request response message to the second terminal device, where the first request response message carries the first information.

With reference to the fifth possible implementation manner of the seventh aspect, in a sixth possible implementation manner of the seventh aspect, the first request response message further carries that the terminal device performs by using the first transmission resource Priority information for the business.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, the possible implementation manner of the sixth possible implementation manner, in the seventh possible implementation manner of the seventh aspect, The terminal device further includes a receiver;

The receiver is configured to: receive first indication information that is sent by the access network device where the terminal device is located, where the first indication information is used to indicate that the terminal device stops forwarding data to the access network device, or The first indication information is used to indicate that the terminal device controls a maximum amount of data forwarded to the access network device; the data includes that the other terminal device forwards to the Data of the access network device;

The processor is further configured to: if the first indication information is used to indicate that the terminal device stops sending data to the access network device, stop the access according to the indication of the first indication information The network device sends data; or, if the first indication information is used to indicate that the terminal device controls the maximum amount of data sent to the access network device, the maximum data indicated by the first indication information The amount controls the amount of data sent to the access network device.

In an eighth aspect, a first access network device is provided, including:

a processor, configured to determine that the amount of data forwarded to the access network device by the first terminal device is greater than or equal to a first threshold;

And a transmitter, configured to send indication information, where the indication information is used to control an amount of data that is forwarded by the first terminal device to the access network device.

In conjunction with the eighth aspect, in a first possible implementation of the eighth aspect, the transmitter is configured to:

Sending the first indication information to the first terminal device, where the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device, or the first indication information is used to indicate The first terminal device controls a maximum amount of data forwarded to the access network device; the data includes data that is forwarded by the other terminal device to the access network device by using the first terminal device.

In conjunction with the eighth aspect, in a second possible implementation of the eighth aspect, the transmitter is configured to:

Sending the second indication information to the terminal device in the coverage of the access network device, where the second indication information is used to indicate that the terminal device in the coverage of the access network device stops sending data to the first terminal device Or the second indication information is used to indicate that the terminal device in the coverage of the access network device controls the maximum amount of data sent to the first terminal device; the data includes the coverage of the access network device. The terminal device forwards data to the access network device through the first terminal device.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, or the second possible implementation manner, in a third possible implementation manner of the eighth aspect, the access network device further includes receiving Device

The receiver is configured to: receive first information sent by the first terminal device; the first transmission resource includes a terminal-to-terminal D2D chain of the first terminal device and other terminal devices pre-configured for the first terminal device Resources for transmitting data on the road;

The processor is further configured to: determine to stop allocating the second transmission resource to other terminal devices in the coverage of the access network device; the second transmission resource is a part of the transmission resource included in the first transmission resource or All transmission resources;

The transmitter is further configured to: send information about the second transmission resource to the first terminal device.

In a ninth aspect, a third terminal device is provided, including:

a transmitter, configured to send, to the access network device where the terminal device is located, a second request message for requesting to establish a connection; the second request message carries a third, indicating that the terminal device is always in a static state Indication information;

a receiver, configured to receive condition information sent by the access network device;

And a processor, configured to determine, according to the condition information, whether the terminal device has an uplink out-of-synchronization phenomenon.

In conjunction with the ninth aspect, in a first possible implementation manner of the ninth aspect, the processor is further configured to:

After determining whether the terminal device has an uplink out-of-synchronization phenomenon according to the condition information, if it is determined that the terminal device has an uplink out-synchronization phenomenon according to the condition information, an uplink synchronization process is initiated to re-connect with the terminal device. The network access device performs uplink synchronization.

With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in the second possible implementation manner of the ninth aspect, the condition information includes a duration threshold or a packet loss threshold; The time limit threshold is used to indicate a maximum time offset of the signal received by the terminal device from the access network device in a predetermined time range, where the packet loss threshold is used to indicate that the terminal device sends The maximum number of lost packets to the access network device.

In conjunction with the second possible implementation of the ninth aspect, the third possible implementation in the ninth aspect In the current mode, if the condition information includes the duration threshold, the processor is configured to:

Determining that the received time offset of the signal from the access network device is greater than or equal to the duration threshold;

It is determined that the terminal device has an uplink out-of-synchronization phenomenon.

With reference to the second possible implementation manner of the ninth aspect, in a fourth possible implementation manner of the ninth aspect, if the condition information includes the packet loss threshold, the processor is configured to:

Determining that the number of lost packets sent to the access network device is greater than or equal to the threshold number of lost packets;

In a tenth aspect, a second access network device is provided, including:

a receiver, configured to receive a second request message sent by the first terminal device for requesting to establish a connection; the second request message carries third indication information that is used to indicate that the first terminal device is always in a static state;

And a transmitter, configured to send condition information to the first terminal device, where the condition information is used to determine whether the first terminal device has an uplink out-of-synchronization phenomenon.

With reference to the tenth aspect, in a first possible implementation manner of the tenth aspect, the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate the first terminal a maximum time offset of the signal received by the device from the access network device in a predetermined time range, where the packet loss threshold is used to indicate that the first terminal device sends the signal to the access network device. The maximum number of lost packets.

With reference to the tenth aspect or the first possible implementation manner of the tenth aspect, in a second possible implementation manner of the tenth aspect, the processor is further configured to:

After the sender sends the condition information to the first terminal device, the uplink synchronization process initiated by the first terminal device is received to perform uplink synchronization with the first terminal device.

In an eleventh aspect, a fourth terminal device is provided, comprising means for performing the method of the first aspect.

According to a twelfth aspect, there is provided a fifth terminal device comprising a module for performing the method of the second aspect Piece.

In a thirteenth aspect, a third access network device is provided, comprising means for performing the method of the third aspect.

In a fourteenth aspect, a sixth terminal device is provided, comprising means for performing the method of the fourth aspect.

In a fifteenth aspect, a fourth access network device is provided, comprising means for performing the method of the fifth aspect.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly described below. It is obvious that the following drawings are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of a possible application scenario according to an embodiment of the present invention;

2 is a flowchart of a method for receiving information according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for sending information according to an embodiment of the present invention;

4 is a flowchart of a data sending indication method according to an embodiment of the present invention;

FIG. 5 is a flow chart showing the interaction of the RSU allocated transmission resources to the terminal device according to an embodiment of the present invention;

FIG. 9 is a flowchart of a first uplink synchronization method according to an embodiment of the present invention;

FIG. 10 is a flowchart of a second uplink synchronization method according to an embodiment of the present invention;

FIG. 11 is an interaction flowchart of an uplink synchronization method according to an embodiment of the present invention;

FIG. 12 is a structural block diagram of a second terminal device according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a second terminal device according to an embodiment of the present disclosure;

FIG. 14 is a structural block diagram of a first terminal device according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a first terminal device according to an embodiment of the present disclosure;

FIG. 16 is a structural block diagram of an access network device according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of an access network device according to an embodiment of the present disclosure;

FIG. 18 is a block diagram showing another structure of a first terminal device according to an embodiment of the present invention;

FIG. 19 is another schematic structural diagram of a first terminal device according to an embodiment of the present disclosure;

20 is another structural block diagram of an access network device according to an embodiment of the present invention;

FIG. 21 is another schematic structural diagram of an access network device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the embodiments of the present invention.

The techniques described herein may be used in various communication systems, such as LTE systems, fifth generation mobile communication systems (5G), and other such communication systems.

Hereinafter, some of the terms in the embodiments of the present invention will be explained to facilitate understanding by those skilled in the art.

1) A terminal device, which is a device that provides voice and/or data connectivity to a user, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a Radio Access Network (RAN) to exchange voice and/or data with the RAN. The terminal device may include a vehicle, a UE, a wireless terminal device, a mobile terminal device, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, and a Remote Station. Access Point (AP), Remote Terminal, Access Terminal, User Terminal, User Agent, or User Device Wait. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a dedicated terminal device in NB-IoT, a portable, pocket, handheld, computer built-in or in-vehicle mobile device. For example, personal communication services (Personal Communication Service, PCS) Telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA) and other equipment.

2) RSU is a terminal device fixed at the roadside for forwarding data of the received V2V/Vehicle to Infrastructure (V2I) D2D link of the vehicle terminal to other network devices, such as forwarding To the base station. A typical RSU may include, for example, a UE-type RSU (terminal type roadside unit) in an LTE system, a UE-NW relay (terminal-network relay node), a Type I/II relay (type I/II relay station), etc. The embodiments of the invention are not limited.

3) a network device, for example, including an access network device, for example, including a base station (for example, an access point), and specifically may refer to an access network that passes through one or more sectors and wireless terminal devices on an air interface. Communication equipment. The base station can be used to convert the received air frame to an Internet Protocol (IP) packet as a router between the wireless terminal device and the rest of the access network, wherein the remainder of the access network can include an IP network. The base station can also coordinate attribute management of the air interface. For example, the base station may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an evolved LTE system (LTE-A), which is not limited by the embodiment of the present invention.

4) D2D technology can support direct data communication between terminal equipment and terminal equipment using dedicated air interface technology, which is an end-to-end direct communication technology. The biggest difference from the traditional cellular communication technology is that with the support of the D2D technology, the terminal device and the terminal device can directly communicate without requiring the relay of the base station, and the base station can perform resource configuration, scheduling, coordination, etc., and the auxiliary terminal. Direct communication between devices. When D2D technology is applied to the Internet of Vehicles service, the D2D link may also be referred to as a V2I link or a V2V link.

5) The terms "system" and "network" in the embodiments of the present invention may be used interchangeably. "Multiple" means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

FIG. 1 is a possible application scenario of an embodiment of the present invention.

For example, RSU1 is deployed in the system, and RSU1 can communicate with the base station. For example, the terminal device 1 and the terminal device 2 can forward data to the base station through the RSU 1, and the terminal device 3 and the terminal device 4 do not forward data to the base station through the RSU 1, but directly communicate with the base station. Then, it can be considered that the terminal device 1 and the terminal device 2 are within the coverage of the RSU1, and the terminal device 3 and the terminal device 4 are outside the coverage of the RSU1. If the RSU1 broadcasts, the terminal device 1 and the terminal device 2 can receive correctly. The terminal device 3 and the terminal device 4 cannot be correctly received. Among them, each terminal device in FIG. 1 takes a vehicle as an example.

The solution provided by the embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to FIG. 2, an information receiving method is provided, and the process of the method is described as follows:

Step 201: The second terminal device receives the first information used by the first terminal device that is sent by the first terminal device by using the D2D link, where the first information is used to indicate the first transmission resource, where the first transmission resource is The first network device where the first terminal device is located is a resource for transmitting data on the D2D link of the first terminal device and the other terminal device, or the first transmission resource is pre-configured by the first terminal device. a resource for transmitting data on a D2D link of a terminal device and other terminal devices;

Step 202: The second terminal device determines, according to the first information, whether the first transmission resource is an optional transmission resource.

Referring to FIG. 3, based on the same inventive concept, an information sending method is provided, and the process of the method is described as follows:

Step 301: The first terminal device sends the first information used by the first terminal device by using the D2D link, where the first information is used to indicate the first transmission resource, and the first transmission resource is the interface where the first terminal device is located. a resource for transmitting data on a D2D link of the first terminal device and the other terminal device allocated by the network device, or the first transmission device is a first terminal device and other terminal devices pre-configured by the first terminal device A resource that transmits data on a D2D link.

Referring to FIG. 4, based on the same inventive concept, a data transmission indication method is provided, and the process of the method is described as follows:

Step 401: The access network device determines the amount of data that is forwarded to the access network device by the first terminal device. Greater than or equal to the first threshold;

Step 402: The access network device sends indication information, where the indication information is used to control the amount of data that the first terminal device forwards to the access network device.

Optionally, the first threshold may be configured by the access network device itself, or may be configured by an Network Management System (OAM).

Optionally, the resource for transmitting data on the D2D link of the first terminal device and the other terminal device may include the first terminal device transmitting data to the other terminal device on the D2D link (such as LTE I2V broadcast or unicast data, or RSU) The transmission resource of the forwarded V2V data may further include transmission resources of other terminal devices transmitting data (such as broadcast or unicast data of V2I of LTE or V2V data forwarded to the RSU) to the first terminal device on the D2D link.

Among them, Figures 2 to 4 are corresponding methods, which are described below. In the following description, the first terminal device is an RSU as an example. In an actual application, the first terminal device is not limited to the RSU, and may be other terminal devices.

example 1:

In Example 1, the RSU is within the coverage of the access network device, and the access network device schedules resources for the RSU. Take the access network device as a base station as an example.

The RSU obtains corresponding RSU configuration information from the network device, and the network device may include, for example, a D2D public security function entity (ProSe function), for example, may include a V2I server, and may also be other network devices, for example, the RSU may obtain a D2D link broadcast. The transmission resource of the channel, where the transmission resource of the D2D link broadcast channel may include, for example, at least one of a frequency location, a time domain location, a resource period, and a frequency hopping mode of the broadcast channel, and the RSU may also obtain the RSU from the network device. Identification number (ID), and so on. The D2D link broadcast channel may include a D2D link common control channel (SBCCH) of the LTE system, or may also include other broadcast channels, such as a broadcast channel customized by the embodiment of the present invention. For example, it may include an RSU broacast common control channel or the like. See Figure 5 for the steps below.

1. The base station can use dedicated signaling to use the first transmission resource used by the RSU (including, for example, V2I). Link transmission resources) are configured to the RSU. For example, in an LTE system, a base station may configure a first transmission resource for an RSU by using Radio Resource Control (RRC) signaling. That is, in the first transmission resource, the first transmission resource is a resource on the D2D link of the RSU and other terminal equipment allocated by the base station where the RSU is located, and the first transmission resource is not limited to the first transmission resource. SA (Scheduling assignment) resource location and data (Data) resource location, where the SA resource may include a period, a frequency location, a time domain location, and a frequency hopping mode of the SA resource, and the Data resource location may include a Data resource. Cycle, frequency position, time domain position, and frequency hopping mode.

2. After obtaining the first transmission resource configured by the base station, the RSU broadcasts the obtained first information on the transmission resource of the D2D link broadcast channel configured for the RSU, so that the terminal device in the coverage of the RSU can receive the first information. The first information broadcast by the RSU. The first information is used to indicate the first transmission resource. For example, after receiving the first information, the terminal device can know that the transmission resource used by the RSU is the first transmission resource.

Optionally, the first information may include an SA resource location and a data resource location occupied by the first transmission resource, and may further include other possible information.

Optionally, there is a case that: the base station broadcasts information of one or more common transmission resources in advance, and the information of the common transmission resource broadcasted by the base station includes information about the transmission resource allocated by the base station to the RSU, that is, the first Information, then in this case, the first information broadcast by the RSU may also include mapping information, for example, may be a mapping table, which may indicate which common transmission resources are the base station allocation among the information of the common transmission resources broadcast by the base station. The first transmission resource to the RSU. For example, the information of the common transmission resource broadcasted by the base station includes the information of the common transmission resource 1, the information of the common transmission resource 2, and the information of the common transmission resource 3, and the first transmission resource allocated by the base station to the RSU is the common transmission resource 3 therein. The RSU may broadcast mapping information, which is used to indicate the common transmission resource 3. After the other terminal device receives the information of the common transmission resource broadcasted by the base station and the mapping information of the RSU broadcast, the RSU may know that the transmission resource used by the RSU is a common transmission resource. 3.

Optionally, in addition to broadcasting the first information, the RSU may broadcast the type of service transmitted by the RSU through the first transmission resource.

Optionally, in addition to broadcasting the first information, the RSU may broadcast priority information of the service performed by the RSU through the first transmission resource.

3. After the terminal device in the RSU coverage receives the first information of the RSU broadcast on the D2D link, if the RSU does not broadcast the priority information of the service performed by the first transmission resource, the terminal devices no longer use the first The transmission resource sends D2D data (for example, the data is not transmitted using the Transmission Time Interval (TTI) corresponding to the first transmission resource) to ensure the priority of the RSU transmission, and collisions with the RSU are avoided as much as possible. The second terminal device in FIG. 5 is any one of the terminal devices in the coverage area of the RSU. Optionally, if the first information broadcast by the RSU is mapping information, the terminal device that receives the mapping information no longer uses all the transmission resources indicated by the mapping information in all common transmission resources acquired from the base station.

Optionally, if the RSU further broadcasts the priority information of the service performed by the RSU through the first transmission resource, the terminal device in the coverage of the RSU may further receive the priority of the service performed by the RSU by using the first transmission resource. Level information. For example, any one of the terminal devices in the coverage of the RSU receives the priority information of the service performed by the RSU through the first transmission resource, and the terminal device is also configured to use part or all of the first transmission resource on the D2D link. When the service of the terminal device is transmitted, the terminal device may compare the priority of the service performed by the terminal device on the D2D link with the priority of the service performed by the RSU through the first transmission resource to determine the first transmission. Whether the resource is an optional transmission resource, that is, the terminal device can determine whether the first priority can be used according to the priority of the service performed by the terminal device on the D2D link and the priority of the service performed by the RSU through the first transmission resource. The transmission resource sends data to ensure the normal operation of the higher priority service in the terminal device and the RSU.

Through the priority information of the RSU broadcast service, the terminal device can determine whether to preempt the transmission resource with the RSU according to the priority, and can ensure that the high priority service is transmitted normally.

Optionally, there may be multiple terminal devices in the RSU coverage area that need to forward data to the base station through the RSU, which may cause congestion of the uplink transmission resources of the base station, and the base station may send indication information to indicate that the RSU controls the amount of data sent to the base station. The indication information may include the first indication information and/or the second indication information. For details, refer to step 4 below, that is, if this occurs, the execution may be performed. Step 4 in Figure 5.

4. When there is too much data to be forwarded through the RSU (for example, the base station determines that the data amount of the data forwarded through the RSU is greater than or equal to the first threshold. The first threshold may be specified by the protocol, or may also be set by the system, such as may be performed by the base station. The self-setting, etc., may cause the base station to broadcast or unicast the corresponding indication information to one or more RSUs in the coverage of the base station. For example, the indication information at this time may include the first Instructing information) to inform the RSUs that the data is no longer forwarded to the base station, or to inform the RSUs of the maximum amount of data forwarded to the base station, that is, to inform the RSU that the amount of data forwarded to the base station cannot exceed the maximum amount of data, so that the RSU can be controlled. The amount of data forwarded to the base station. For example, the first indication information may occupy 1 bit, indicating whether the RSU can continue to forward data to the base station, or the first indication information may also carry a maximum amount of data, where the maximum data volume may be forwarded by the RSU to the base station. The upper limit of the amount of data, and so on.

Alternatively, step 4 can also be as follows:

4. When there is too much data to be forwarded through the RSU (for example, the base station determines that the data amount of the data forwarded through the RSU is greater than or equal to the first threshold. The first threshold may be specified by the protocol, or may also be set by the system, such as may be performed by the base station. When the base station uplinks the transmission resources, the base station may broadcast the corresponding indication information (for example, the indication information at this time may include the second indication information), or the base station may also reach the terminal within the coverage of the base station. The device unicasts the second indication information to inform the terminal devices that the data is no longer forwarded to the RSU, or can notify the terminal devices to forward the maximum amount of data to the RSU, that is, inform the terminal devices that the amount of data forwarded to the RSU cannot exceed the maximum. The amount of data, so that the amount of data that the RSU forwards to the base station can be controlled, thereby reducing the amount of data received by the base station. For example, the second indication information may occupy 1 bit, indicating whether the terminal device can continue to forward data to the RSU, or the second indication information may also carry a maximum amount of data, where the maximum amount of data may be the amount of data that the terminal device can forward to the RSU. The upper limit is such that the terminal device within the coverage of the base station no longer forwards data to the RSU or controls the amount of data forwarded to the RSU, so that the amount of data that the RSU forwards to the base station can be reduced.

Example 2:

In Example 1, the RSU broadcasts the information of the transmission resource used by itself (ie, the first information), which is required. A resource that occupies a certain D2D link broadcast channel. If there is no terminal device in the coverage of the RSU, the RSU broadcasts as usual, which wastes broadcast resources. In view of this, by providing Example 2, broadcast signaling overhead can be saved.

Similarly, in Example 2, the RSU is also within the coverage of the access network device, and the access network device schedules resources for the RSU. Take the access network device as a base station as an example.

In Example 2, for example, there is no terminal device in the coverage of the RSU at first, and the RSU may not broadcast the first information allocated by the base station for the RSU, so the RSU may not acquire the resources of the broadcast channel of the D2D link from the network device. Of course, if the RSU needs to use the broadcast channel of the D2D link for other operations, the resource of the broadcast channel of the D2D link can also be obtained from the network device. For the manner of obtaining, refer to the description in Example 1.

Please refer to FIG. 6. Step 1 of Example 2 can refer to Example 1. The different steps in Example 2 are described below.

2. After entering the coverage of the RSU, a terminal device sends a request message for requesting to establish a connection to the RSU, for example, the terminal device is referred to as a second terminal device, and the message requesting the connection is referred to as a first request message. .

3. The RSU sends a first request response message for the first request message to the second terminal device to establish a connection with the second terminal device.

Optionally, the RSU may carry the first information in the first request response message, or the RSU may carry the first information in other possible dedicated signaling and send the information to the second terminal device.

Optionally, there is a case that: the base station broadcasts information of one or more common transmission resources in advance, and the information of the common transmission resource broadcasted by the base station includes information about the transmission resource allocated by the base station to the RSU, that is, the first Information, in this case, the first information carried by the first request response message sent by the RSU may also include mapping information, for example, the mapping information may include a mapping table, which may indicate information of a common transmission resource broadcast by the base station. Which common transmission resources are the first transmission resources allocated by the base station to the RSU.

Optionally, the RSU may send the first type of information to the second terminal device, and may send, to the second terminal device, a service type that is transmitted by the RSU by using the first transmission resource, for example, may include a V2I service type.

The RSU may carry the first information and the type of service transmitted by the RSU through the first transmission resource. The same signaling is sent to the terminal device, or the RSU may also carry the first information and the service type transmitted by the RSU through the first transmission resource in different signaling and send the information to the terminal device.

Optionally, in addition to sending the first information to the terminal device, the RSU may further send, to the terminal device, priority information of the service performed by the RSU through the first transmission resource.

The RSU may carry the first information, the service type transmitted by the RSU through the first transmission resource, and the priority information of the service performed by the RSU through the first transmission resource in the same signaling to be sent to the terminal device, or the RSU The first information, the service type transmitted by the RSU through the first transmission resource, and the priority information of the service performed by the RSU through the first transmission resource may be carried in different signaling and sent to the terminal device, or the RSU may also The first information, the service type transmitted by the RSU through the first transmission resource, and any two types of information of the priority information of the service performed by the RSU through the first transmission resource may be carried in a signaling and sent to the terminal device. .

In this way, the RSU can use the dedicated signaling to inform the terminal device that the connection is established with the RSU, reducing the overhead of unnecessary broadcast resources.

After the second terminal device receives the first information sent by the RSU, if the priority information of the service performed by the RSU through the first transmission resource is not received, the second terminal device does not use the first transmission resource to send data. The first transmission resource is no longer used to receive data to ensure the priority of the RSU transmission, and collisions with the RSU are avoided as much as possible. Optionally, if the first information sent by the RSU is mapping information, the second terminal device that receives the mapping information no longer uses all the transmission resources indicated by the mapping information in all common transmission resources acquired from the base station.

Optionally, if the RSU further sends the priority information of the service performed by the RSU through the first transmission resource, the second terminal device may further receive the priority information of the service performed by the RSU by using the first transmission resource. For example, the second terminal device receives the priority information of the service performed by the RSU through the first transmission resource, and the second terminal device may according to the priority of the service performed by the second terminal device on the D2D link. The priority of the service performed by the RSU through the first transmission resource determines whether the first transmission resource is preempted. For the part, refer to the description of step 3 in the first embodiment.

Optionally, there may be multiple terminal devices in the RSU coverage area that need to forward the number to the base station through the RSU. According to this, this may cause the crowding of uplink transmission resources of the base station. If this happens, step 5 in Figure 6 can be performed. Step 5 in Figure 6 can also be implemented in two ways. Reference can be made to step 4 in Example 1.

Example 3:

In the example 3, the RSU is in the coverage of the access network device, but the RSU can independently select the resource, that is, the RSU can independently select the first transmission resource, and the access network device does not need to allocate resources for the RSU, and the RSU allocates the self. The first transmission resource may include resources for the RSU to pre-configure the RSU to transmit data to the D2D link of other terminal devices. The first transmission resource includes an SA resource and a data resource location that are not limited to the first transmission resource, where the SA resource may include a period, a frequency location, a time domain location, and a frequency hopping mode of the SA resource, where the Data resource location may include The period, frequency position, time domain position, and frequency hopping mode of the Data resource. For example, the RSU can include street traffic lights, and so on. Take the access network device as a base station as an example. See Figure 7 below.

1. The RSU broadcasts the first information through the transmission resource of the D2D link broadcast channel, so that the terminal device in the coverage of the RSU can receive the first information broadcast by the RSU. The first information is used to indicate the first transmission resource. For example, after receiving the first information, the terminal device can know that the transmission resource used by the RSU is the first transmission resource.

The first transmission resource may be a transmission resource selected by the RSU from among the transmission resources configured by the system for the RSU.

Optionally, the manner in which the RSU obtains the transmission resource of the broadcast channel may be referred to step 1 in the first example, or the RSU may obtain the transmission resource of the broadcast channel by using other methods.

2. Refer to step 3 of Example 1. The second terminal device in FIG. 7 is any one of the terminal devices in the coverage area of the RSU.

3. The RSU may send the first information to the base station accessed by the RSU to indicate that the base station stops. The first transmission resource is allocated to the terminal device within the coverage of the base station.

4. After receiving the first information sent by the RSU, the base station may reply the information of the second transmission resource to the RSU, to indicate that the base station stops allocating the second transmission resource to other terminal devices. The second transmission resource is all transmission resources or partial transmission resources included in the first transmission resource, that is, the second transmission resource may be a subset of the first transmission resource. Optionally, the information about the second transmission resource may indicate the time domain information that the RSU can use, similar to the gap information in the LTE system. Optionally, the information of the second transmission resource may include 1 bit, to indicate whether the RSU is The first transmission resource can be used to transmit data on the D2D link.

For example, the first information sent by the RSU to the base station includes information of the transmission resource 1, information of the transmission resource 2, and information of the transmission resource 3 to inform the base station that the RSU is to use the transmission resources, and the base station should stop allocating the transmission resources to other resources. Terminal equipment to avoid collisions. After receiving the information of the transmission resource 1, the information of the transmission resource 2, and the information of the transmission resource 3, the base station may perform a determination to determine which of the transmission resources are not allocated to other terminal devices, and then send the determination result to the RSU, and determine the result. It includes information on the second transmission resource. For example, the base station determines that the transmission resource 1 and the transmission resource 2 are not allocated to other terminal devices, but the transmission resource 3 may still be allocated to other terminal devices, and the base station may transmit the information of the transmission resource 1 and the information of the transmission resource 2 to the RSU. After receiving the information of the transmission resource 1 and the information of the transmission resource 2, the RSU can know that the base station may also allocate the transmission resource 3 to other terminal devices. Optionally, the RSU can use the transmission resource 3 as little as possible in the future to avoid collisions. For example, if the base station determines that the transmission resource 1, the transmission resource 2, and the transmission resource 3 are not allocated to other terminal devices, the information of the second transmission resource that the base station sends to the RSU may include the information of the transmission resource 1 and the transmission resource 2 The information and the information of the transmission resource 3 may also include 1 bit. After receiving the 1 bit, the RSU can know that all the transmission resource base stations that the RSU is ready to use are not allocated to other terminal devices.

Optionally, there may be multiple terminal devices in the RSU coverage area that need to forward data to the base station through the RSU, which may cause the uplink transmission resources of the base station to be occupied. If this happens, step 5 in Figure 7 can be performed. Step 5 in Figure 7 can also be implemented in two ways. Reference can be made to step 4 in Example 1.

Example 4:

In the example 3, the RSU broadcasts the information of the transmission resource used by itself (ie, the first information), and needs to occupy a certain broadcast channel resource of the D2D link. If there is no terminal device in the coverage of the RSU, the RSU broadcasts as usual, which wastes broadcast resources. In view of this, by providing Example 4, broadcast resources can be saved.

Similarly, in example 4, the RSU may be in the coverage of the access network device, but the RSU may independently schedule resources by itself, that is, independently scheduling the first transmission resource, without the access network device scheduling resources for the RSU, RSU itself The scheduled first transmission resource may be a resource for the RSU to pre-configure the RSU to transmit data to the D2D link of other terminal devices. The first transmission resource includes an SA resource and a data resource location that are not limited to the first transmission resource, where the SA resource may include a period, a frequency location, a time domain location, and a frequency hopping mode of the SA resource, where the Data resource location may include The period, frequency position, time domain position, and frequency hopping mode of the Data resource. For example, the RSU can include street traffic lights, and so on. Take the access network device as a base station as an example.

In Example 2, for example, there is no terminal device in the coverage of the RSU at first, and the RSU may not broadcast the first information scheduled by the RSU, so the RSU may not acquire the resources of the D2D link broadcast channel from the network device. Of course, if the RSU needs to use the D2D link broadcast channel for other operations, the resources of the D2D link broadcast channel can also be obtained from the network device. For the acquisition manner, refer to the description in Example 1. See Figure 8 for the steps below.

Steps 1, 2, and 3 of FIG. 8 may refer to steps 2, 3, and 4 of Example 2, respectively, and steps 4, 5, and 6 of FIG. 8 may refer to steps 3, 4, and 5 of Example 3, respectively.

The above is an introduction to the technical solutions provided in FIGS. 2 to 4.

In addition, the RSU is usually a stationary terminal device deployed on the road, and its uplink timing generally does not change. However, according to the prior art, the base station still needs to continuously send uplink timing information for the RSU, which causes unnecessary signaling overhead. To solve this problem, the embodiments of the present invention provide the following solutions.

Referring to FIG. 9, based on the same inventive concept, a first uplink synchronization method is provided, and the process of the method is described as follows:

Step 901: The first terminal device sends a second request message for requesting to establish a connection to the access network device where the first terminal device is located, where the second request message carries a message indicating that the first terminal device is always in a static state. Third indication information;

Step 902: The first terminal device receives condition information sent by the access network device.

Step 903: The first terminal device determines, according to the condition information, whether the first terminal device has an uplink out-of-synchronization phenomenon.

Referring to FIG. 10, based on the same inventive concept, a second uplink synchronization method is provided, and the process of the method is described as follows:

Step 1001: The access network device receives a second request message that is sent by the first terminal device and is used to request to establish a connection. The second request message carries third indication information that is used to indicate that the first terminal device is always in a static state.

Step 1002: The access network device sends condition information to the first terminal device. The condition information is used to determine whether the first terminal device has an uplink out-of-synchronization phenomenon.

That is, when the first terminal device sends the second request message to the access network device, the first terminal device can be notified that the first terminal device will always be in a static state, and the access network device only needs to send an uplink to the first terminal device. Timing information saves signaling overhead. In addition, the access network device may send condition information to the first terminal device, so that the first terminal device may determine whether the first terminal device has an uplink out-of-synchronization phenomenon, for example, if an uplink out-of-synchronization phenomenon occurs, the first terminal device The device can perform uplink synchronization with the access network device in time, so that, in the case of saving signaling overhead, uplink synchronization between the first terminal device and the access network device can be ensured as much as possible to avoid the first terminal device. The communication process with the access network device is affected.

Figures 9 and 10 show the corresponding methods, which are described below.

Example 5:

The example in which the access network device is a base station and the first terminal device is an RSU is not limited thereto. See Figure 11.

1. The RSU initiates a connection request to the base station, for example, the RSU sends a second request message for requesting to establish a connection to the base station.

Optionally, the second request message may carry indication information indicating that the RSU is to be in a static state, for example, the indication information is referred to as third indication information, for example, the third indication information may occupy 1 bit, indicating that the RSU does not move. .

Alternatively, the RSU may also use a special connection request cell when transmitting the second request message to inform the base station in this way that the RSU does not move.

2. The base station sends condition information to the RSU according to the second request message sent by the RSU, and the condition information can be used to determine whether the uplink out-of-synchronization phenomenon occurs in the RSU.

For example, the condition information may include a threshold value, and the RSU may judge based on the threshold value. The condition information may include different threshold values. For example, the condition information may include a packet loss threshold value and/or a duration threshold, which is exemplified below.

Optionally, the condition information may include a packet loss threshold, where the packet loss threshold may be used to indicate the maximum allowed packet loss sent by the RSU to the base station, for example, if the RSU determines the number of lost packets sent to the base station. If the threshold is greater than or equal to the number of lost packets, the RSU may determine that the RSU has an uplink out-of-synchronization phenomenon. When calculating the number of lost packets of the RSU, the number of consecutive packet loss of the RSU may be calculated, or the number of lost packets of the RSU in a certain period of time may also be calculated. For example, a possible continuous packet loss threshold may be 3, if the RSU determines 8 consecutive Hybrid Automatic Repeat reQuest (HARQ) retransmissions of 3 consecutive packets sent to the base station. If it fails, the RSU determines that the RSU has an upstream out-of-synchronization phenomenon.

Optionally, the condition information may include a duration threshold, where the duration threshold may be used to indicate a maximum time offset of the signal received by the RSU from the base station within a predetermined time range, if the RSU determines that the received signal from the base station is If the time offset within the predetermined time range is greater than or equal to the time threshold, the RSU determines that the RSU has an uplink out-of-synchronization phenomenon. The predetermined time range may be specified by the protocol, or may be set by the device itself, for example, may be set by the RSU, or may be set by the base station in advance for the RSU, and the like. For example, the time offset refers to the deviation between the measurement time of the Global Navigation Satellite System and the measured downlink synchronization of the base station. For example, if the RSU finds that after a certain period of time, the downlink synchronization time determined by using the lock is corresponding. The deviation between the GNSS time and the GNSS time corresponding to the currently measured base station downlink synchronization position is large At the configured synchronization time threshold, the RSU determines that uplink out-of-synchronization has occurred.

If the condition information includes multiple thresholds, the RSU can make decisions based on different thresholds. For example, if the condition information includes the number of lost packets and the duration threshold, the RSU may determine the threshold according to the number of lost packets and the duration threshold according to the foregoing method, and the RSU may be in any one of the conditions included in the condition information. When the decision of the limit is in line with the uplink out-of-synchronization situation, it is determined that the RSU has an uplink out-of-synchronization phenomenon, so that the RSU can select a better decision threshold value for the decision to facilitate the operation of the RSU, or the RSU can also include all of the condition information. When the threshold value is judged to be in line with the uplink out-of-synchronization situation, it is determined that the RSU has an uplink out-of-synchronization phenomenon, and such a judgment method is more accurate.

Optionally, the condition information may further include period information, where the period information may be used to indicate how long the RSU determines whether an uplink out-of-synchronization occurs.

Optionally, the condition information may further include different information, and is not limited to the above example, as long as the condition information can be used to determine whether the uplink out-of-synchronization phenomenon occurs in the RSU.

3. After receiving the condition information sent by the base station, the RSU may determine, according to the content included in the condition information, whether the uplink out-of-synchronization phenomenon occurs. The RSU may not need to re-receive the condition information every time the judgment is performed. For example, after determining the location of the RSU, the RSU may send a second request message to the base station, and then the base station may send the condition information to the RSU, and then, if the RSU If the location does not change, the RSU may not send the second request message to the base station again, and the base station will not send the condition information to the RSU again, or for example, after the base station sends the condition information to the RSU, if the condition information does not occur. If the base station changes, the base station may not send the condition information to the RSU again, and the RSU may use the previously received condition information to make a decision each time the decision is made. If the uplink out-of-synchronization phenomenon does not occur, the judgment can be continued. If the uplink out-of-synchronization phenomenon occurs, the following step 4 can be performed.

Optionally, the RSU may periodically perform the determination, for example, periodically according to the period information carried by the condition information, or the RSU may also perform the judgment in real time, and the like.

4. After the RSU determines that the uplink is out of synchronization, the uplink synchronization process may be initiated to regain the uplink synchronization (for example, the Timing Advance (TA) may be regained), that is, the uplink synchronization is re-established with the base station.

For example, in the LTE system, after the RSU determines that the uplink is out of synchronization, the RSU may initiate a random access procedure to regain uplink synchronization. Of course, the uplink synchronization process is not limited to the random access process, and the process of performing the uplink synchronization is within the protection scope of the embodiment of the present invention.

The device provided by the embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to FIG. 12, based on the same inventive concept, a first type of terminal device is provided, which may include a receiving unit 1201 and a determining unit 1202. Optionally, the terminal device may further include a sending unit 1203, which is shown together in FIG. The terminal device may be used to perform the method described in the foregoing FIG. 2 to FIG. 8. For example, the terminal device may be the second terminal device as described above, and therefore, functions and functions implemented by the units in the terminal device, etc. Please refer to the description of the previous method section for details.

Please refer to FIG. 13, which is a schematic diagram of a possible physical structure of the terminal device shown in FIG. In an actual application, the physical device corresponding to the receiving unit 1201 may be the receiver 1301, the physical device corresponding to the determining unit 1202 may be the processor 1302, and the physical device corresponding to the sending unit 1203 may be the transmitter 1303.

The processor 1302 may include, for example, a central processing unit (CPU) or an application specific integrated circuit (ASIC), which may be one or more integrated circuits for controlling program execution, and may be a field programmable gate. The hardware circuit developed by the Field Programmable Gate Array (FPGA) may be a baseband chip.

The receiver 1301 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The transmitter 1303 is configured to perform network communication with an external device, for example, may communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The receiver 1301 and the transmitter 1303 may be connected to the processor 1302 via the bus 1304, or the receiver 1301 and the transmitter 1303 may be respectively connected to the processor 1302 through a dedicated connection line. FIG. 13 is an example in which the receiver 1301 and the transmitter 1303 are both connected to the processor 1302 via the bus 1304.

By designing the processor 1302, the code corresponding to the method shown above is solidified into the chip, so that the chip can perform the method shown in FIG. 2 to FIG. 8 during operation. How to The processor 1302 performs design programming and is well known to those skilled in the art, and details are not described herein again.

Referring to FIG. 14, based on the same inventive concept, a second terminal device is provided, and the terminal device may include a transmitting unit 1401. Optionally, the terminal device may further include a receiving unit 1402 and a control unit 1403, both of which are shown in FIG. 14.

The terminal device may be configured to perform the method described in the foregoing FIG. 2 to FIG. 8. For example, the terminal device may be the first terminal device as described above, and therefore, for functions and the like implemented by each unit in the terminal device, Please refer to the description of the previous method section for details.

Please refer to FIG. 15 , which is a schematic diagram of a possible physical structure of the terminal device shown in FIG. 14 . In an actual application, the physical device corresponding to the sending unit 1401 may be the transmitter 1501, the physical device corresponding to the receiving unit 1402 may be the receiver 1502, and the physical device corresponding to the control unit 1403 may be the processor 1503.

The processor 1503 may include, for example, a CPU or an ASIC, and may be one or more integrated circuits for controlling program execution, may be hardware circuits developed using an FPGA, and may be a baseband chip.

The transmitter 1501 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The receiver 1502 is configured to perform network communication with an external device, for example, by using a network such as an Ethernet, a wireless access network, or a wireless local area network to communicate with an external device.

The transmitter 1501 and the receiver 1502 may be connected to the processor 1503 via the bus 1504, or the transmitter 1501 and the receiver 1502 may be respectively connected to the processor 1503 through a dedicated connection line. FIG. 15 is an example in which the transmitter 1501 and the receiver 1502 are connected to the processor 1503 via the bus 1504.

By design programming the processor 1503, the code corresponding to the method shown above is solidified into the chip, so that the chip can perform the method shown in FIG. 2 to FIG. 8 at runtime. How to design and program the processor 1503 is a technique well known to those skilled in the art, and details are not described herein again.

Referring to FIG. 16, based on the same inventive concept, a first access network device is provided, and the access network device may include a transmitting unit 1601 and a determining unit 1602. Optionally, the access network device may also include The receiving unit 1603 is shown in FIG.

The access network device may be configured to perform the method described in the foregoing FIG. 2 to FIG. 8. For example, the access network device may be an access network device as described above, and therefore, for each unit in the access network device For the functions to be implemented, etc., refer to the description of the previous method section, and no further description is provided.

Please refer to FIG. 17, which is a schematic diagram of a possible physical structure of the access network device shown in FIG. 16. In an actual application, the physical device corresponding to the sending unit 1601 may be the transmitter 1701, the physical device corresponding to the determining unit 1602 may be the processor 1702, and the physical device corresponding to the receiving unit 1603 may be the receiver 1703.

The processor 1702 may include, for example, a CPU or an ASIC, and may be one or more integrated circuits for controlling program execution, may be hardware circuits developed using an FPGA, and may be a baseband chip.

The transmitter 1701 is configured to perform network communication with an external device, for example, may communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The receiver 1703 is configured to perform network communication with an external device, for example, by using a network such as an Ethernet, a wireless access network, or a wireless local area network to communicate with an external device.

These transmitters 1701 and receivers 1703 may be coupled to the processor 1702 via a bus 1704, or the

transmitters

1701 and 1703 may be coupled to the processor 1702 via dedicated connection lines, respectively. FIG. 17 is an example in which the transmitter 1701 and the receiver 1703 are connected to the processor 1702 via the bus 1704.

By designing the processor 1702, the code corresponding to the method shown above is solidified into the chip, so that the chip can perform the method shown in FIGS. 2-8 described above during operation. How to design and program the processor 1702 is a technique well known to those skilled in the art, and details are not described herein again.

Referring to FIG. 18, based on the same inventive concept, a third terminal device is provided, which may include a transmitting unit 1801, a receiving unit 1802, and a decision unit 1803. Optionally, the terminal device may further include a first operating unit 1804. Optionally, the terminal device may further include a first determining unit 1805 and a second determining unit 1806. The foregoing units are all shown in FIG. 18.

The terminal device can be used to perform the method described in the foregoing FIG. 9 to FIG. 11, for example, the terminal device can The first terminal device is as described above. Therefore, for the functions and the like implemented by the units in the terminal device, reference may be made to the description of the previous method portion, and details are not described herein.

Referring to FIG. 19, it is a schematic diagram of a possible physical structure of the terminal device shown in FIG. 18. In an actual application, the physical device corresponding to the sending unit 1801 may be the transmitter 1901, and the physical device corresponding to the receiving unit 1802 may be the receiver 1902, the determining unit 1803, the first operating unit 1804, the first determining unit 1805, and the second determining. The physical devices corresponding to unit 1806 may each be processor 1903.

The transmitter 1901 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The receiver 1902 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The processor 1903, the processor 1903 may include, for example, a CPU or an ASIC, and may be one or more integrated circuits for controlling program execution, may be hardware circuits developed using an FPGA, and may be a baseband chip.

These transmitters 1901 and receivers 1902 may be coupled to the processor 1903 via a bus 1904, or the transmitter 1901 and the receiver 1902 may be coupled to the processor 1903 via dedicated connection lines, respectively. FIG. 19 is an example in which the transmitter 1901 and the receiver 1902 are connected to the processor 1903 via the bus 1904.

By programming the processor 1903, the code corresponding to the method shown above is solidified into the chip, so that the chip can perform the method shown in the foregoing FIGS. 9-11 during operation. How to design and program the processor 1903 is a technique well known to those skilled in the art, and details are not described herein again.

Referring to FIG. 20, based on the same inventive concept, a second access network device is provided, which may include a receiving unit 2001 and a transmitting unit 2002. Optionally, the access network device may further include a second operating unit 2003, both shown in FIG.

The access network device may be configured to perform the method described in the foregoing FIG. 9 to FIG. 11. For example, the access network device may be an access network device as described above, and therefore, for each unit in the access network device For the functions to be implemented, etc., refer to the description of the previous method section, and no further description is provided.

Referring to FIG. 21, it is a schematic diagram of a possible physical structure of the access network device shown in FIG. In an actual application, the physical device corresponding to the receiving unit 2001 may be the receiver 2102, the physical device corresponding to the sending unit 2002 may be the transmitter 2101, and the physical device corresponding to the second operating unit 2003 may be the processor 2103.

The transmitter 2101 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The receiver 2102 is configured to perform network communication with an external device, for example, can communicate with an external device through a network such as an Ethernet, a wireless access network, or a wireless local area network.

The processor 2103, for example, may include a CPU or an ASIC, may be one or more integrated circuits for controlling program execution, may be hardware circuits developed using an FPGA, and may be a baseband chip.

These transmitters 2101 and receivers 2102 can be connected to the processor 2103 via the bus 2104, or the transmitter 2101 and the receiver 2102 can also be connected to the processor 2103 via dedicated connection lines, respectively. FIG. 21 is an example in which the transmitter 2101 and the receiver 2102 are connected to the processor 2103 via the bus 2104.

By programming the processor 2103, the code corresponding to the method shown above is solidified into the chip, so that the chip can perform the method shown in FIGS. 9-11 described above during operation. How to design and program the processor 2103 is a technique well known to those skilled in the art, and details are not described herein again.

In the embodiment of the present invention, the first terminal device may send information about the transmission resource used by the first terminal device (for example, the transmission resource used by the first terminal device is referred to as the first transmission resource), so that the other information is received. The terminal device may no longer use the first transmission resource, thereby avoiding collisions. Moreover, the first terminal device sends the first information, and the coverage of the first terminal device is generally smaller than the coverage of the base station, and even if the first terminal device broadcasts the first information, the terminal device that receives the first information The number is generally smaller than the number of terminal devices broadcast by the receiving base station, and the terminal device that does not receive the first information sent by the first terminal device can continue to use the first transmission resource, thereby improving the utilization rate of the first transmission resource. Reduce waste of resources. Moreover, if the coverage of the first terminal device is greater than the communication range of the first terminal device, only the terminal device located outside the communication range of the first terminal device may not receive the first information, that is, the portion. The terminal device can use the first transmission resource, and at this time, it does not transmit with the first terminal device. The collision produces a collision. That is, by adopting the technical solution provided by the embodiment of the present invention, the utilization of resources is improved in the case of avoiding collision.

In the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit or unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to implement the embodiments of the present invention.

The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution of the present invention may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device (which may be a personal computer, A server, or network device, or the like, or a processor, performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a universal serial bus flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and the like, which can store program codes.

The above embodiments are only used to describe the technical solutions of the present invention in detail, but the description of the above embodiments is only for the purpose of facilitating the understanding of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or substitutions that may be readily conceived by those skilled in the art are intended to be included within the scope of the present invention.

Claims

An information receiving method, comprising:

The second terminal device receives the first information sent by the first terminal device by using the terminal-to-terminal D2D link, where the first information is used to indicate the first transmission resource, and the first transmission resource is the first terminal device The access network device is the resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the first terminal device, or the first transmission resource is the first terminal device in advance. Configuring resources for transmitting data on the D2D link of the first terminal device and other terminal devices;

The second terminal device determines, according to the first information, whether the first transmission resource is a transmission resource that is selectable by the second terminal device.
The method of claim 1 wherein

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcast by the access network device, the first transmission allocated by the access network device to the first terminal device a resource, the first transmission resource being a part of the transmission resource or all transmission resources of the transmission resource; or

The first information includes a scheduling allocated resource location and a data resource location occupied by the first transmission resource.
The method according to claim 1 or 2, wherein the second terminal device receives the first information used by the first terminal device sent by the first terminal device by using the D2D link, including:

Receiving, by the second terminal device, the first information broadcast by the first terminal device by using the D2D link.
A method according to claim 1 or 2, wherein

Before the second terminal device receives the first information used by the first terminal device that is sent by the first terminal device by using the D2D link, the method further includes:

Sending, by the second terminal device, the first request message for requesting to establish a connection to the first terminal device;

Receiving, by the second terminal device, the first information used by the first terminal device that is sent by the first terminal device by using the D2D link, including:

The second terminal device receives the first request response message sent by the first terminal device by using a D2D link, where the first request response message carries the first information.
The method of any of claims 1-4, wherein the method further comprises:

And the second terminal device further receives, by using the D2D link, priority information of the service that is sent by the first terminal device by using the first transmission resource.
The method according to claim 5, wherein the determining, by the second terminal device, whether the first transmission resource is an optional transmission resource according to the first information comprises:

Determining, by the second terminal device, the first transmission according to the priority information of the service performed by the first terminal device by using the first transmission resource and the priority information of the service performed by the second terminal device Whether the resource is an optional transmission resource.
The method of any of claims 1-6, wherein the method further comprises:

The second terminal device receives the second indication information that is broadcast by the access network device where the second terminal device is located, where the second indication information is used to indicate that the second terminal device stops sending to the first terminal device Data, or the second indication information is used to indicate that the second terminal device controls a maximum amount of data sent to the first terminal device; the data includes that the second terminal device forwards by using the first terminal device Data for the access network device;

If the second indication information is used to indicate that the second terminal device stops sending data to the first terminal device, the second terminal device stops to the first according to the indication of the second indication information. The terminal device sends data; or, if the second indication information is used to indicate that the second terminal device controls the maximum amount of data sent to the first terminal device, the second terminal device according to the second indication The maximum amount of data indicated by the information controls the amount of data sent to the first terminal device.
A method for transmitting information, comprising:

The first terminal device sends the first information used by the first terminal device by using a terminal-to-terminal D2D link, where the first information is used to indicate the first transmission resource, and the first transmission resource a resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the access network device where the first terminal device is located, or the first transmission resource is a resource for transmitting data on a D2D link of the first terminal device and other terminal devices pre-configured by the first terminal device.
The method of claim 8 wherein:

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcasted by the access network, the first transmission resource allocated by the access network device to the first terminal device The first transmission resource is a part of the transmission resource or all transmission resources of the transmission resource; or

The first information includes a scheduling allocated resource location and a data resource location occupied by the first transmission resource.
The method according to claim 8 or 9, wherein the first terminal device sends the first information used by the first terminal device by using a D2D link, including:

The first terminal device broadcasts the first information by using the D2D link.
The method of claim 10, wherein the method further comprises:

The first terminal device further broadcasts, by using the D2D link, priority information of a service that is transmitted by the first terminal device by using the first transmission resource.
The method according to claim 8 or 9, wherein the first transmission resource comprises data transmitted on a D2D link of the first terminal device and other terminal devices pre-configured for the first terminal device. Before the first terminal device sends the first information used by the first terminal device by using the D2D link, the method further includes:

Transmitting, by the first terminal device, the first information to an access network device where the first terminal device is located, to instruct the access network device to stop allocating the first transmission resource to the access network Other terminal equipment within the coverage of the equipment;

Receiving, by the first terminal device, information about the second transmission resource sent by the access network device, to determine that the access network device has stopped allocating the second transmission resource to the coverage of the access network device Other terminal device; the second transmission resource is a part included in the first transmission resource Transfer resources or all transfer resources.
A method according to claim 8 or claim 9, wherein

Before the first terminal device sends the first information used by the first terminal device by using the D2D link, the method further includes:

Receiving, by the first terminal device, a first request message sent by the second terminal device for requesting to establish a connection;

The first terminal device sends the first information used by the first terminal device by using a D2D link, including:

The first terminal device sends a first request response message to the second terminal device by using the D2D link, where the first request response message carries the first information.
The method according to claim 13, wherein the first request response message further carries priority information of the service performed by the first terminal device by using the first transmission resource.
The method of any of claims 8-14, wherein the method further comprises:

The first terminal device receives the first indication information that is sent by the access network device where the first terminal device is located, where the first indication information is used to indicate that the first terminal device stops forwarding to the access network device. Data, or the first indication information is used to indicate that the first terminal device controls a maximum amount of data forwarded to the access network device; the data includes that the other terminal device forwards to the Data of the access network device;

If the first indication information is used to indicate that the first terminal device stops sending data to the access network device, the first terminal device stops the access according to the indication of the first indication information. The network device sends data; or, if the first indication information is used to indicate that the first terminal device controls the maximum amount of data sent to the access network device, the first terminal device according to the first indication The maximum amount of data indicated by the information controls the amount of data sent to the access network device.
A data transmission indication method, comprising:

The access network device determines that the amount of data forwarded to the access network device by the first terminal device is greater than or equal to a first threshold;

The access network device sends indication information, where the indication information is used to control the first terminal setting The amount of data that is forwarded to the access network device.
The method of claim 16, wherein the access network device sends the indication information, including:

The access network device sends first indication information to the first terminal device, where the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device, or the first The indication information is used to indicate that the first terminal device controls a maximum amount of data forwarded to the access network device; the data includes data that is forwarded by the other terminal device to the access network device by using the first terminal device.
The method of claim 16, wherein the access network device sends the indication information, including:

The access network device sends the second indication information to the terminal device in the coverage of the access network device, where the second indication information is used to indicate that the terminal device in the coverage of the access network device stops to the The first terminal device sends data, or the second indication information is used to indicate that the terminal device in the coverage of the access network device controls the maximum amount of data sent to the first terminal device; the data includes the The terminal device within the coverage of the network access device forwards data to the access network device by using the first terminal device.
The method of any of claims 16-18, wherein the method further comprises:

The access network device receives the first information sent by the first terminal device; the first transmission resource includes a terminal-to-terminal D2D chain of the first terminal device and other terminal devices pre-configured for the first terminal device Resources for transmitting data on the road;

The access network device determines to stop allocating the second transmission resource to other terminal devices in the coverage of the access network device; the second transmission resource is part of the transmission resource or all transmissions included in the first transmission resource Resource

The access network device sends the information about the second transmission resource to the first terminal device.
An uplink synchronization method, comprising:

Transmitting, by the first terminal device, a second request message for requesting to establish a connection to the access network device where the first terminal device is located, where the second request message is used to indicate that the first terminal device Third indication information that is always at rest;

Receiving, by the first terminal device, condition information sent by the access network device;

The first terminal device determines, according to the condition information, whether the first terminal device has an uplink out-of-synchronization phenomenon.
The method according to claim 20, wherein after the first terminal device determines whether the first terminal device has an uplink out-of-synchronization phenomenon according to the condition information, the method further includes:

If the first terminal device determines that the first terminal device has an uplink out-of-synchronization phenomenon according to the condition information, the first terminal device initiates an uplink synchronization process to perform uplink synchronization with the access network device. .
The method according to claim 20 or 21, wherein the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate that the first terminal device receives the a maximum time offset of the signal of the access network device in a predetermined time range, where the number of lost packets is used to indicate the maximum number of lost packets sent by the first terminal device to the access network device .
The method according to claim 22, wherein, if the condition information includes the duration threshold, the first terminal device determines, according to the condition information, whether the first terminal device has an uplink loss. Step phenomenon, including:

Determining, by the first terminal device, that the received time offset of the signal from the access network device is greater than or equal to the duration threshold;

The first terminal device determines that the first terminal device has an uplink out-of-synchronization phenomenon.
The method according to claim 22, wherein, if the condition information includes the threshold number of packet loss, the first terminal device determines, according to the condition information, whether the first terminal device has appeared. Up-synchronization, including:

The first terminal device determines that the number of lost packets sent to the access network device is greater than or equal to the threshold number of lost packets;

The first terminal device determines that the first terminal device has an uplink out-of-synchronization phenomenon.
An uplink synchronization method, comprising:

The access network device receives a second request message sent by the first terminal device for requesting to establish a connection; the second request message carries third indication information that is used to indicate that the first terminal device is always in a static state;

The access network device sends condition information to the first terminal device; the condition information is used to determine whether the first terminal device has an uplink out-of-synchronization phenomenon.
The method according to claim 25, wherein the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate that the first terminal device receives the A maximum time offset of the signal of the access network device in a predetermined time range, where the number of lost packets is used to indicate the maximum number of lost packets sent by the first terminal device to the access network device.
The method of claim 25 or 26, further comprising: after the access network device sends the condition information to the first terminal device,

The access network device receives an uplink synchronization process initiated by the first terminal device to perform uplink synchronization with the first terminal device.
A terminal device, comprising:

a receiving unit, configured to receive first information sent by the first terminal device by using a terminal-to-terminal D2D link, where the first information is used to indicate a first transmission resource, where the first transmission resource is the first terminal The access network device where the device is located is the resource for transmitting data on the D2D link of the first terminal device and other terminal devices allocated by the first terminal device, or the first transmission resource is the first terminal device Pre-configured resources for transmitting data on the D2D link of the first terminal device and other terminal devices;

And a determining unit, configured to determine, according to the first information, whether the first transmission resource is a transmission resource that is selectable by the terminal device.
The terminal device according to claim 28, characterized in that

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcast by the access network device, the first transmission allocated by the access network device to the first terminal device a resource, where the first transmission resource is part of the transmission resource or all transmissions Transmit resources; or

The first information includes a scheduling allocated resource location and a data resource location occupied by the first transmission resource.
The terminal device according to claim 28 or 29, wherein the receiving unit is configured to:

Receiving, by the D2D link, the first information broadcast by the first terminal device.
The terminal device according to claim 28 or 29, wherein the terminal device further comprises a transmitting unit;

The sending unit is configured to send, to the first terminal device, a request for establishment, before the receiving unit receives the first information used by the first terminal device sent by the first terminal device by using the D2D link. The first request message of the connection;

The receiving unit is configured to: receive, by using a D2D link, a first request response message sent by the first terminal device, where the first request response message carries the first information.
The terminal device according to any one of claims 28 to 31, wherein the receiving unit is further configured to:

And receiving, by the D2D link, priority information of the service that is sent by the first terminal device by using the first transmission resource by the first terminal device.
The terminal device according to claim 32, wherein the determining unit is configured to:

Determining, according to the priority information of the service performed by the first terminal device by using the first transmission resource, and the priority information of the service performed by the second terminal device, whether the first transmission resource is optional. Transfer resources.
The terminal device according to any one of claims 28 to 33, wherein the terminal device further comprises a sending unit;

The receiving unit is further configured to: receive second indication information that is broadcast by the access network device where the terminal device is located, where the second indication information is used to indicate that the terminal device stops sending data to the first terminal device, Or the second indication information is used to indicate that the terminal device controls a maximum amount of data sent to the first terminal device; the data includes that the terminal device is configured by using the first terminal Data to be forwarded to the access network device;

The determining unit is further configured to: if the second indication information is used to indicate that the terminal device stops sending data to the first terminal device, stop the sending unit according to the indication of the second indication information Transmitting data to the first terminal device; or, if the second indication information is used to indicate that the terminal device controls a maximum amount of data sent to the first terminal device, indicating according to the second indication information The maximum amount of data controls the amount of data sent to the access network device.
A terminal device, comprising:

a sending unit, configured to send the first information used by the first terminal device by using a terminal-to-terminal D2D link, where the first transmission resource is the access network device where the first terminal device is located a resource for transmitting data on a D2D link of the first terminal device and other terminal devices allocated by the first terminal device, or the first transmission resource is the first terminal device pre-configured by the first terminal device Resources for transmitting data on the D2D link of other terminal devices.
The terminal device according to claim 35, characterized in that

The first information includes mapping information, where the mapping information is used to indicate, in the transmission resource broadcasted by the access network, the first transmission resource allocated by the access network device to the terminal device. The first transmission resource is a part of the transmission resource or all transmission resources of the transmission resource; or

The first information includes a scheduling allocated resource location and a data resource location occupied by the first transmission resource.
The terminal device according to claim 35 or 36, wherein the transmitting unit is configured to:

Broadcasting the first information through the D2D link.
The terminal device according to claim 37, wherein the sending unit is further configured to:

Transmitting priority information of the service transmitted by the terminal device by using the first transmission resource by using the D2D link.
The terminal device according to claim 35 or claim 36, wherein the terminal device further comprises a receiving unit; if the first transmission resource comprises the first terminal device pre-configured for the first terminal device Resources for transmitting data on the D2D link of other terminal devices:

The sending unit is further configured to send the first information to an access network device where the terminal device is located before sending the first information by using a D2D link, to indicate that the access network device stops The first transmission resource is allocated to other terminal devices in the coverage of the access network device;

The receiving unit is configured to: receive information about the second transmission resource sent by the access network device, to determine that the access network device has stopped allocating the second transmission resource to the coverage of the access network device The other transmission device is: the second transmission resource is a partial transmission resource or all transmission resources included in the first transmission resource.
The terminal device according to claim 35 or 36, wherein the terminal device further comprises a receiving unit;

The receiving unit is configured to: before the sending unit sends the first information by using a D2D link, receive a first request message sent by the second terminal device for requesting to establish a connection;

The sending unit is further configured to send a first request response message to the second terminal device by using the D2D link, where the first request response message carries the first information.
The terminal device according to claim 40, wherein the first request response message further carries priority information of the service performed by the first terminal device by using the first transmission resource.
The terminal device according to any one of claims 35 to 41, wherein the terminal device further comprises a receiving unit and a control unit;

The receiving unit is configured to: receive first indication information that is sent by the access network device where the terminal device is located, where the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device Or the first indication information is used to indicate that the first terminal device controls a maximum amount of data that is forwarded to the access network device; the data includes that the other terminal device forwards to the interface by using the first terminal device Data of the network access device;

The control unit is configured to: if the first indication information is used to indicate that the terminal device stops sending data to the access network device, according to the indication of the first indication information, the sending unit stops The access network device sends data; or, if the first indication information is used to indicate that the terminal device controls a maximum amount of data sent to the access network device, according to the first indication The maximum amount of data indicated by the information controls the amount of data sent to the access network device.
An access network device, comprising:

a determining unit, configured to determine that the amount of data forwarded to the access network device by the first terminal device is greater than or equal to a first threshold;

And a sending unit, configured to send indication information, where the indication information is used to control an amount of data that is forwarded by the first terminal device to the access network device.
The access network device according to claim 43, wherein the sending unit is configured to:

Sending the first indication information to the first terminal device, where the first indication information is used to indicate that the first terminal device stops forwarding data to the access network device, or the first indication information is used to indicate The first terminal device controls a maximum amount of data forwarded to the access network device; the data includes data that is forwarded by the other terminal device to the access network device by using the first terminal device.
The access network device according to claim 43, wherein the sending unit is configured to:

Sending the second indication information to the terminal device in the coverage of the access network device, where the second indication information is used to indicate that the terminal device in the coverage of the access network device stops sending data to the first terminal device Or the second indication information is used to indicate that the terminal device in the coverage of the access network device controls the maximum amount of data sent to the first terminal device; the data includes the coverage of the access network device. The terminal device forwards data to the access network device through the first terminal device.
The access network device according to any one of claims 43 to 45, wherein the access network device further comprises a receiving unit;

The receiving unit is configured to: receive first information sent by the first terminal device; the first transmission resource includes a terminal to terminal D2D of the first terminal device and other terminal devices pre-configured for the first terminal device Resources for transmitting data on the link;

The determining unit is further configured to: determine to stop allocating the second transmission resource to other terminal devices in the coverage of the access network device; the second transmission resource is a part of the transmission resource included in the first transmission resource or All transmission resources;

The sending unit is further configured to: send information about the second transmission resource to the first terminal device.
A terminal device, comprising:

a sending unit, configured to send, to the access network device where the terminal device is located, a second request message for requesting to establish a connection; the second request message carries a third device for indicating that the terminal device is always in a static state Indication information;

a receiving unit, configured to receive condition information sent by the access network device, where the condition information is used to determine whether the terminal device has an uplink out-of-synchronization phenomenon;

And a determining unit, configured to determine, according to the condition information, whether the terminal device has an uplink out-of-synchronization phenomenon.
The terminal device according to claim 47, wherein the terminal device further comprises a first operating unit, configured to:

After the determining unit determines, according to the condition information, whether the terminal device has an uplink out-of-synchronization phenomenon, if the determining unit determines that the first terminal device has an uplink out-of-synchronization phenomenon, initiates an uplink synchronization process, to Re-synchronizing with the access network device.
The terminal device according to claim 47 or 48, wherein the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate that the first terminal device receives a maximum time offset of a signal from the access network device in a predetermined time range, where the packet loss threshold is used to indicate a maximum packet loss sent by the first terminal device to the access network device Quantity.
The terminal device according to claim 49, wherein the terminal device further comprises a first determining unit and a second determining unit; if the condition information includes the duration threshold, then:

The first determining unit is configured to: after the receiving unit receives the condition information sent by the access network device, determine that the received time offset of the signal from the access network device is greater than or equal to the duration Threshold value

The second determining unit is configured to: determine that the first terminal device has an uplink out-of-synchronization phenomenon.
The terminal device according to claim 49, wherein the terminal device further includes a first determining unit and a second determining unit; if the condition information includes the threshold number of lost packets, then:

The first determining unit is configured to: after the receiving unit receives the condition information sent by the access network device, determine that the number of lost packets sent to the access network device is greater than or equal to the threshold of the number of lost packets value;

The second determining unit is configured to: determine that the first terminal device has an uplink out-of-synchronization phenomenon.
An access network device, comprising:

a receiving unit, configured to receive a second request message that is sent by the first terminal device to request to establish a connection, where the second request message carries third indication information that is used to indicate that the first terminal device is always in a static state;

And a sending unit, configured to send condition information to the first terminal device, where the condition information is used to determine whether the first terminal device has an uplink out-of-synchronization phenomenon.
The access network device according to claim 52, wherein the condition information includes a duration threshold or a packet loss threshold; the duration threshold is used to indicate that the first terminal device receives a maximum time offset of a signal from the access network device in a predetermined time range, where the packet loss threshold is used to indicate a maximum packet loss sent by the first terminal device to the access network device Quantity.
The access network device according to claim 52 or 53, wherein the access network device further comprises a second operating unit, configured to:

After the sending unit sends the condition information to the first terminal device, the uplink synchronization process initiated by the first terminal device is received to perform uplink synchronization with the first terminal device.