WO2015106654A1

WO2015106654A1 - Method for sending and detecting synchronisation information, and user device

Info

Publication number: WO2015106654A1
Application number: PCT/CN2015/070391
Authority: WO
Inventors: 陈文洪; 赵锐; 高秋彬; 彭莹
Original assignee: 电信科学技术研究院
Priority date: 2014-01-17
Filing date: 2015-01-09
Publication date: 2015-07-23
Also published as: CN104796368A; CN104796368B

Abstract

Disclosed in the present application are a method for sending and detecting synchronisation information, and a user device. The method comprises: a sending device sends a synchronisation signal, and on the basis of its own network connection state and/or reference synchronisation source information, determines whether to send synchronisation information on a synchronisation channel corresponding to the synchronisation signal; if determining to send synchronisation information on the synchronisation channel, then the sending device, on the basis of its own network connection state and/or reference synchronisation source information, determines the synchronisation information that needs to be sent on the synchronisation channel and, on appointed physical resources, sends the determined synchronisation information by means of the synchronisation channel. The present application provides a solution for sending synchronisation information in a D2D application scenario; the sending device can, on the basis of its own network connection state and/or reference synchronisation source information, determine whether to send synchronisation information on a synchronisation channel corresponding to a synchronisation signal, and the synchronisation information carried in a synchronisation channel can transfer between user devices the synchronisation information thereof, expanding the scope of synchronisation.

Description

Method for transmitting and detecting synchronous information and user equipment

This application claims priority to Chinese Patent Application No. 201410023553.9, entitled "Synchronization, Transmission, Detection, and User Equipment for Synchronized Information", filed on January 17, 2014, the entire contents of which are hereby incorporated by reference. Combined in this application.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method for transmitting and detecting synchronization information and a user equipment.

Background technique

Device-to-device (D2D), which is a terminal-through technology, refers to a user equipment (User Equipment, UE; also called a terminal) that can transmit data through a direct link in a short range. There is no need to forward through the central node (ie base station), see Figure 1.

Long Term Evolution (LTE) D2D technology refers to D2D discovery and D2D communication processes that operate on the licensed frequency band of the LTE network and are controlled by the LTE network. The LTE D2D technology can not only fully utilize the advantages of the D2D technology, but also control the LTE network to overcome some problems of the traditional D2D technology, such as uncontrollable interference. The introduction of LTE D2D technology will enable LTE technology to evolve from pure wireless mobile cellular communication technology to "Universal Connectivity Technology".

D2D transmission includes D2D discovery or D2D communication, and the UE first needs to synchronize before performing D2D transmission. The UE obtains a synchronization reference for transmitting the D2D signal according to the synchronization signal transmitted by the reference synchronization source. When the UE sends the D2D signal, it can simultaneously transmit its own determined synchronization signal to provide synchronization reference for other UEs. At the same time, when transmitting the synchronization signal, the UE may also send a synchronization channel, and carry some synchronization information, such as configuration information of the D2D resource or related information of the reference synchronization source, in the synchronization channel.

Figure 2 contains several typical D2D transmission scenarios: D2D transmission within a cell, inter-cell D2D transmission, partial network coverage D2D transmission, and no network coverage D2D transmission.

For the scenario of the D2D transmission in the cell, the UE in the cell obtains the synchronization with the network side, and the reference synchronization source of the UE is the evolved Node B (eNB, ie, the base station in the LTE system), therefore, the UE The synchronization between the two can be acquired according to the synchronization with the network side, so that the D2D transmission is performed on the synchronous discovery resource (that is, the resource used in the D2D discovery process), and the D2D resource configuration used can also be obtained from the network side.

2. For the scenario of D2D transmission between cells, when the cells are not synchronized, the UEs of different cells are also not synchronized, and the UE may not know the D2D resources used by the neighboring cells. At this time, the UE cannot directly communicate with the UEs of the neighboring cells. Perform D2D discovery or D2D communication. The UE needs to obtain the timing reference of the neighboring cell from the eNB of the neighboring cell or the UE of the neighboring cell through the synchronization signal sent by the neighboring cell, or obtain the resource configuration information of the neighboring cell from the UE of the neighboring cell through the synchronization channel, so that the inter-cell can be performed. D2D communication.

3. For a part of the network coverage scenario, the UE outside the coverage area and the UE in the coverage area are not synchronously transmitted, which may cause serious mutual interference. At this time, the UE in the coverage area can forward the synchronization information and the D2D resource configuration information in the coverage area to the UE outside the coverage area through the synchronization signal and the synchronization channel, so that the UE outside the coverage area can also be synchronized based on the coverage area. The information and the D2D resource configuration information are transmitted with the UEs in the coverage area to reduce interference caused by the unsynchronization.

4. For the scenario without network coverage, neither communication party accesses the network. In order to ensure synchronization between the two communication parties, each synchronization information can be transmitted through the synchronization signal and the synchronization channel to synchronize the communication parties.

During the actual D2D transmission process, different types of UEs need to send synchronization channels carrying different information according to their own conditions to transmit their own synchronization information between UEs and expand the synchronization range. However, how the UE sends and designs the synchronization channel enables different UEs to use the synchronization channel to transmit different types of information. Currently, there is no corresponding solution.

Summary of the invention

The embodiment of the present application provides a method for sending and detecting synchronization information and a user equipment, thereby providing a scheme for transmitting and detecting synchronization information in a D2D application scenario.

A method for transmitting synchronization information, the method comprising:

The transmitting device sends a synchronization signal;

Determining, by the sending device, whether to send synchronization information on a synchronization channel corresponding to the synchronization signal according to the network connection status of the synchronization signal and/or the information of the reference synchronization source;

And if the sending device determines to send the synchronization information on the synchronization channel, determining, according to its own network connection status and/or information of the reference synchronization source, synchronization information that needs to be sent in the synchronization channel, and in the agreed physical The determined synchronization information is transmitted over the synchronization channel on the resource.

In an implementation, the sending device determines whether to send the synchronization information on the synchronization channel corresponding to the synchronization signal according to the network connection status of the network and the information of the reference synchronization source, which specifically includes:

If the sending device is currently located in the network connection and the reference synchronization source of the sending device is the network side device, the sending device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the network side device, the sending device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is itself, the sending device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is a user equipment other than itself or a global positioning system (GPS), the transmitting device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or,

And if the sending device is currently located outside the network connection, and the current forwarding number of the synchronization signal of the reference synchronization source of the sending device does not exceed a set threshold, the sending device determines to send on the synchronization channel corresponding to the synchronization signal. Synchronize information; or,

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is not itself, the sending device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

If the current number of times of the synchronization signal of the reference synchronization source of the transmitting device exceeds the set threshold, the transmitting device determines not to send the synchronization information on the synchronization channel corresponding to the synchronization signal.

In an implementation, the sending device determines the synchronization information that needs to be sent in the synchronization channel according to the network connection status of the network and/or the information of the reference synchronization source, including:

Determining, by the sending device, the synchronization information that needs to be sent in the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the length of the information carried by the synchronization channel N bits, N is a positive integer. That is, the sending device determines the synchronization information that needs to be sent in the synchronization channel according to the correspondence between the network connection state and the synchronization information carried by the synchronization channel; or the transmitting device carries the information according to the reference synchronization source and the synchronization channel. Corresponding relationship of the synchronization information, determining the synchronization information to be sent in the synchronization channel; or determining, by the transmitting device, the correspondence between the network connection state and the information of the reference synchronization source and the synchronization information carried by the synchronization channel, Synchronization information transmitted in the synchronization channel.

In an implementation, the sending device determines, according to its own network connection status and/or information of the reference synchronization source, the synchronization information that needs to be sent in the synchronization channel, including:

The sending device indicates the meaning of the synchronization information of the last N-k bits carried in the synchronization channel by using the synchronization information of the first k bits carried in the synchronization channel; or

The sending device indicates the meaning of the synchronization information of the first N-k bits carried in the synchronization channel by using the synchronization information of the last k bits carried in the synchronization channel; or

The sending device indicates the meaning of the synchronization information of the remaining N-k bits carried in the synchronization channel by using the synchronization information of the middle k bits carried in the synchronization channel;

The length of information carried by the synchronization channel is N bits, and N is a positive integer.

Preferably, the k-bit synchronization information includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device.

Further, if the number of bits of the synchronization information determined by the sending device is less than N, the method further includes:

The sending device adds zeros to the synchronization information carried in the synchronization channel, so that the number of bits of the synchronization information carried in the synchronization channel is N.

Based on any of the above embodiments, the synchronization information includes at least one of the following information:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.

A method for detecting synchronization information, the method comprising:

The receiving device detects the synchronization signal;

After detecting the synchronization signal, the receiving device detects synchronization information on the synchronization channel corresponding to the synchronization signal;

Determining, by the receiving device, information about a network connection state of the transmitting device that sends the synchronization signal and/or a reference synchronization source according to whether the synchronization information is detected;

If the receiving device detects the synchronization information, the receiving device determines, according to the synchronization information, a synchronization reference that is used by the device to transmit or receive the device to the device D2D signal.

In an implementation, the receiving device determines, according to whether the synchronization information is detected, the network connection status of the sending device and/or the information of the reference synchronization source, including:

If the receiving device detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the receiving device detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the receiving device detects the synchronization information, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is the sending device itself; or

If the receiving device detects the synchronization information, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a user equipment or a GPS other than the sending device itself; or

If the receiving device detects the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection does not exceed a set threshold; or

If the receiving device does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

And if the receiving device does not detect the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.

In an implementation, after the receiving device detects the synchronization information, the method further includes: acquiring synchronization information on the synchronization channel; and acquiring, by the receiving device, synchronization information on the synchronization channel, including:

The receiving device determines the synchronization information on the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the information length of the synchronization channel is N Bit, N is a positive integer. That is, the receiving device determines the synchronization information on the synchronization channel according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel; or the receiving device according to the information of the reference synchronization source and the synchronization information carried by the synchronization channel. Corresponding relationship, determining synchronization information on the synchronization channel; or determining, by the receiving device, the correspondence between the network connection state and the reference synchronization source information and the synchronization information carried by the synchronization channel, determining the synchronization channel Synchronization information.

In an implementation, preferably, the receiving device acquires synchronization information on the synchronization channel, including:

The receiving device learns the meaning of the synchronization information of the last N-k bits of the synchronization channel by detecting the synchronization information of the first k bits in the synchronization channel; or

The receiving device learns the meaning of the synchronization information of the first N-k bits in the synchronization channel by detecting the synchronization information of the last k bits in the synchronization channel; or

The receiving device learns the meaning of the synchronization information of the remaining N-k bits in the synchronization channel by using the detected synchronization information of the middle k bits in the synchronization channel;

a cell ID of the serving cell where the sending device is located;

A transmitting device for synchronizing information, the device comprising:

a sending module, configured to send a synchronization signal;

a first processing module, configured to determine whether to send synchronization information on a synchronization channel corresponding to the synchronization signal according to a network connection state of the sending device and/or information of a reference synchronization source;

a second processing module, configured to determine, according to the network connection status of the sending device and/or the information of the reference synchronization source, that the first processing module determines to send the synchronization information on the synchronization channel, The synchronization information transmitted in the synchronization channel is transmitted, and the determined synchronization information is transmitted through the synchronization channel on an agreed physical resource.

In an implementation, the first processing module is specifically configured to:

If the device is currently located in the network connection and the reference synchronization source of the device is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is another user equipment or GPS other than itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the current number of times of the synchronization signal of the reference synchronization source of the device does not exceed the set threshold, determining to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is not itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

If the current number of times of the synchronization signal of the reference synchronization source of the device exceeds the set threshold, it is determined that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.

In an implementation, the second processing module is specifically configured to:

Determining, according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, synchronization information that needs to be sent in the synchronization channel; wherein the number of bits of the synchronization information is N, N is A positive integer. That is, according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel, the synchronization information that needs to be sent in the synchronization channel is determined; or, according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, the need is determined. Synchronization information transmitted in the synchronization channel; or, according to the correspondence between the network connection status and the reference synchronization source information and the synchronization information carried by the synchronization channel, the synchronization information to be transmitted in the synchronization channel is determined.

In an implementation, preferably, the second processing module is specifically configured to:

Indicating the synchronization channel by using synchronization information of the first k bits carried in the synchronization channel The meaning of the synchronization information of the last Nk bits carried in the synchronization channel; or the synchronization information of the last k bits carried in the synchronization channel, indicating the meaning of the synchronization information of the first Nk bits carried in the synchronization channel; or And indicating, by using the synchronization information of the middle k bits carried in the synchronization channel, the meaning of the synchronization information of the remaining Nk bits carried in the synchronization channel; where the number of information bits carried by the synchronization channel is N, N Is a positive integer.

Further, the second processing module is further configured to:

If the number of bits of the synchronization information determined by the transmitting device is less than N, the synchronization information carried in the synchronization channel is padded with zeros, so that the number of bits of the synchronization information carried in the synchronization channel is N.

a cell ID of the serving cell where the sending device is located;

A device for detecting synchronization information, the device comprising:

a first detecting module, configured to detect a synchronization signal;

a second detecting module, configured to: after the first detecting module detects the synchronization signal, detect synchronization information on the synchronization channel corresponding to the synchronization signal;

a processing module, configured to determine, according to whether the second detection module detects the synchronization information, information about a network connection state of a sending device that sends a synchronization signal and/or a reference synchronization source; The second detecting module detects the synchronization information, and determines, according to the synchronization information, the synchronization reference used by the detecting device itself to transmit or receive the device-to-device D2D signal.

In an implementation, the processing module is specifically configured to:

If the second detection module detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the second detection module detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the second detection module detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is the sending device itself; or

If the second detection module detects the synchronization information, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or ,

If the second detection module detects the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device that is currently located outside the network connection does not exceed the set threshold; or

If the second detection module does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the second detection module does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.

In an implementation, the processing module is further configured to acquire synchronization information on the synchronization channel after the second detection module detects the synchronization information;

The processing module acquires synchronization information on the synchronization channel, including:

Determining the synchronization information carried in the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the number of information bits carried by the synchronization channel is N, N Is a positive integer. That is, the synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel; or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel is determined. Synchronization The synchronization information carried in the channel; or the synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the information of the reference synchronization source and the synchronization information carried by the synchronization channel.

In an implementation, preferably, the processing module acquires synchronization information on the synchronization channel, including:

Obtaining, by using the synchronization information of the first k bits in the synchronization channel detected by the second detection module, the meaning of the synchronization information of the last N-k bits of the synchronization channel; or

Obtaining, by using the synchronization information of the last k bits in the synchronization channel detected by the second detection module, the meaning of the synchronization information of the first N-k bits in the synchronization channel; or

Obtaining, by the second detection module, the synchronization information of the middle k bits in the synchronization channel, the meaning of the synchronization information of the remaining Nk bits in the synchronization channel; wherein the information carried by the synchronization channel The length is N bits and N is a positive integer.

a cell ID of the serving cell where the sending device is located;

A user equipment comprising a transceiver and at least one processor coupled to the transceiver, wherein:

1. If the user equipment is a sending device for synchronization information;

The transceiver is configured to transmit a synchronization signal;

The processor is configured to determine, according to the network connection status of the user equipment and/or the information of the reference synchronization source, whether to send synchronization information on the synchronization channel corresponding to the synchronization signal, and if it is determined to send synchronization information on the synchronization channel, Determining, according to the network connection status of the user equipment and/or the information of the reference synchronization source, the synchronization information that needs to be sent in the synchronization channel, and triggering the transceiver to transmit the determined physical channel through the synchronization channel. Synchronization information.

In implementation, the processor is configured to specifically:

If the user equipment is currently located in the network connection and the reference synchronization source of the user equipment is the network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or, if the user equipment is currently located in the network If the reference synchronization source of the user equipment is a network side device, the synchronization information is sent on the synchronization channel corresponding to the synchronization signal; or if the user equipment is currently located outside the network connection and the user equipment is Determining, by the reference synchronization source, the synchronization information on the synchronization channel corresponding to the synchronization signal; or if the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is other than itself Determining, by the user equipment or the GPS, that the synchronization information is sent on the synchronization channel corresponding to the synchronization signal; or if the user equipment is currently located outside the network connection and the current synchronization number of the synchronization signal of the reference synchronization source of the user equipment is not If the threshold is exceeded, it is determined that the same channel is sent on the synchronization channel corresponding to the synchronization signal. Information; or, if the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is not itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or, if the user equipment is If the current number of times of the synchronization signal of the reference synchronization source exceeds the set threshold, it is determined that the synchronization information is not transmitted on the synchronization channel corresponding to the synchronization signal.

In implementation, the processor is configured to specifically:

Determining, according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, the synchronization information that needs to be sent in the synchronization channel; wherein the information length of the synchronization channel is N bits. N is a positive integer. That is, according to the network connection status and synchronization channel Corresponding relationship of the carried synchronization information, determining synchronization information that needs to be sent in the synchronization channel; or determining, according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, that the synchronization information needs to be sent in the synchronization channel Synchronization information; or, according to the correspondence between the network connection status and the reference synchronization source information and the synchronization information carried by the synchronization channel, the synchronization information that needs to be transmitted in the synchronization channel is determined.

In an implementation, preferably, the processor is configured to:

And indicating, by using synchronization information of the first k bits carried in the synchronization channel, a meaning of synchronization information of the last Nk bits carried in the synchronization channel; or, by using synchronization of the last k bits carried in the synchronization channel Information indicating the meaning of the synchronization information of the first Nk bits carried in the synchronization channel; or indicating the remaining Nk bits carried in the synchronization channel by using the synchronization information of the middle k bits carried in the synchronization channel The meaning of the synchronization information; wherein the number of information bits carried by the synchronization channel is N, and N is a positive integer.

In an implementation, if the number of bits of the synchronization information determined by the sending device is less than N, the processor is further configured to:

Zeroing is performed after the synchronization information carried in the synchronization channel, so that the number of bits of the synchronization information carried in the synchronization channel is N.

a cell ID of the serving cell where the sending device is located;

2. If the user equipment is a detection device for synchronization information, then:

The transceiver is configured to detect a synchronization signal; after detecting the synchronization signal, detecting synchronization information on a synchronization channel corresponding to the synchronization signal;

The processor is configured to determine, according to whether the synchronization information is detected, a network connection status of the transmitting device that sends the synchronization signal and/or information of a reference synchronization source; if the transceiver detects the synchronization information, according to the The synchronization information determines the synchronization reference used by the user equipment to transmit or receive the device-to-device D2D signal.

In an implementation, the processor determines, according to whether the synchronization information is detected, the network connection status of the sending device and/or the information of the reference synchronization source, including:

If the synchronization information is detected, determining that the sending device is currently located in a network connection, and the reference synchronization source of the sending device is a network side device; or

If the synchronization information is detected, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the synchronization information is detected, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the sending device itself; or

If the synchronization information is detected, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a user equipment or a GPS other than the sending device itself; or

If the synchronization information is detected, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device that is currently located outside the network connection does not exceed a set threshold; or

If the synchronization information is not detected, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the synchronization information is not detected, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device exceeds a set threshold.

In an implementation, the processor is further configured to acquire synchronization information on the synchronization channel after the transceiver detects the synchronization information;

The processor acquires synchronization information on the synchronization channel, including:

Determining the synchronization information carried in the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the number of information bits carried by the synchronization channel is N, N Is a positive integer. That is, the synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel; or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel is determined. The synchronization information carried in the synchronization channel is determined; or the synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the information of the reference synchronization source and the synchronization information carried by the synchronization channel. In an implementation, preferably, the processor acquires synchronization information on the synchronization channel, including:

Obtaining the meaning of synchronization information of the last Nk bits of the synchronization channel by detecting synchronization information of the first k bits in the synchronization channel; or, by detecting the last k bits in the synchronization channel Synchronizing information, knowing the meaning of the synchronization information of the first Nk bits in the synchronization channel; or, by detecting the synchronization information of the middle k bits in the synchronization channel, learning the remaining Nk of the synchronization channels The meaning of the synchronization information of the bit; wherein the length of the information carried by the synchronization channel is N bits, and N is a positive integer.

a cell ID of the serving cell where the sending device is located;

The embodiment of the present invention provides a scheme for transmitting synchronization information in a D2D application scenario. The sending device may determine whether to send on the synchronization channel corresponding to the synchronization signal according to the network connection status of the network and/or the information of the reference synchronization source. Synchronizing information, and determining that synchronization information to be transmitted in the synchronization channel is determined according to its own network connection status and/or information of the reference synchronization source when determining to transmit synchronization information on the synchronization channel; thus, it is possible to transfer itself between user equipments The synchronization information is used to expand the synchronization range. In addition, in the embodiment of the present application, different network connection states and/or information of the reference synchronization source correspond to different synchronization information, so that different user equipments can use different synchronization channels of the same structure to carry different The synchronization information reduces the detection complexity of the receiving device while ensuring the flexibility of the transmitted synchronization information.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following drawings will be briefly described in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of the present application, Those skilled in the art can also obtain other drawings based on these drawings without paying for inventive labor.

1 is a schematic diagram of a path for data transmission using D2D technology in the background art;

2 is a schematic diagram of a D2D transmission scenario provided in the background art;

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

FIG. 4 is a schematic flowchart of a method for detecting synchronization information according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an application scenario of Embodiment 1 provided by the present application;

FIG. 6 is a schematic diagram of an application scenario of Embodiment 2 provided by the present application;

FIG. 7 is a schematic structural diagram of a device for sending synchronization information according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a synchronization information detecting apparatus according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, and the embodiments of the present invention are to be understood Application. The embodiments described in the present application are only a part of the embodiments of the present application, 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 application without departing from the inventive scope are the scope of the present application.

A method for sending synchronization information provided by an embodiment of the present application is shown in FIG. 3, and the method includes the following steps:

Step 31: The sending device sends a synchronization signal.

The synchronization signal sent in this step is used to synchronize with other user equipment. The sending device may determine the synchronization signal that is sent by itself according to the synchronization reference that is obtained from the reference synchronization source. The reference synchronization source may be a network side device (such as a base station, an eNB in an LTE system), or another user equipment. It can be a Global Positioning System (GPS) or a transmitting device itself.

In this step, the physical resource used by the sending device to send the synchronization signal may be a pre-agreed physical resource, or may be a physical resource determined according to a physical resource used by the reference synchronization source to send the synchronization signal.

Step 32: The sending device determines, according to its own network connection status and/or information of the reference synchronization source, whether to send synchronization information on the synchronization channel corresponding to the synchronization signal.

In this step, the network connection status of the sending device includes two states: the sending device is located in the network connection and the sending device is located outside the network connection;

The information of the reference synchronization source of the transmitting device includes but is not limited to at least one of the following information: a type of the reference synchronization source used to indicate the sending device (eg, network side device, other user equipment, sending) Information of the device itself, GPS, etc., information indicating the number of times the synchronization signal of the reference synchronization source of the transmitting device is currently forwarded.

In this step, the sending device determines whether to send the synchronization information on the synchronization channel corresponding to the synchronization signal according to the network connection status of the synchronization signal and/or the information of the reference synchronization source, so that the receiving device can detect whether the synchronization device detects the synchronization channel according to the synchronization signal. The synchronization information is used to know the network connection status of the transmitting device and/or the information of the reference synchronization source.

Step 33: When the sending device determines to send the synchronization information on the synchronization channel, according to the network connection status of the network and/or the information of the reference synchronization source, the synchronization information that needs to be sent in the synchronization channel is determined, and the synchronization is performed on the agreed physical resource. The channel transmits the determined synchronization information. That is, if the transmitting device determines to send the synchronization information on the synchronization channel, it determines the synchronization information that needs to be sent in the synchronization channel according to its own network connection status and/or the information of the reference synchronization source, and synchronizes on the agreed physical resources. The channel transmits the determined synchronization information.

In this step, the transmitting device with different network connection status and/or reference synchronization source information may carry the same synchronization information in the synchronization channel when transmitting the synchronization channel, or may carry different synchronization information in the synchronization channel.

In the embodiment of the present application, the sending device sends a synchronization signal, determines whether the synchronization information is sent on the synchronization channel corresponding to the synchronization signal, and the sending device determines, according to its own network connection state and/or reference synchronization, when the synchronization information is sent on the synchronization channel. The source information determines the synchronization information that needs to be sent in the synchronization channel, and sends the determined synchronization information through the synchronization channel on the agreed physical resource, thereby providing a transmission scheme of the synchronization information in the D2D application scenario, and the sending device Determining whether to send synchronization information on the synchronization channel corresponding to the synchronization signal according to its own network connection status and/or information of the reference synchronization source, and determining synchronization information that needs to be sent in the synchronization channel, so that it can be between user equipments. Pass your own synchronization information to expand the synchronization range.

In this embodiment of the present application, the synchronization information carried in the synchronization channel includes, but is not limited to, at least one of the following information:

a cell ID of the serving cell where the sending device is located;

Sending D2D resource configuration information of the serving cell where the device is located;

The radio frame and/or subframe number where the synchronization channel is located;

An indication message indicating whether the transmitting device is located within the network connection;

The indication information indicating the type of the reference synchronization source of the transmitting device;

The current number of times the synchronization signal sent by the sending device is forwarded;

Sending D2D resource configuration information of the cluster where the device is located;

Synchronization maintenance time information indicating a reference synchronization source of the transmitting device;

The information carried by the synchronization channel sent by the reference synchronization source detected by the sending device.

In an implementation, in step 32, the transmitting device determines whether to send synchronization information on the synchronization channel corresponding to the synchronization signal according to its own network connection status and/or information of the reference synchronization source, including the following seven preferred methods:

Mode 1, when the sending device is currently located in the network connection and the reference synchronization source of the sending device is the network side device, the sending device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal. That is, if the sending device is currently located in the network connection and the reference synchronization source of the sending device is the network side device, the transmitting device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal.

In this manner, in step 33, the synchronization information that the transmitting device needs to transmit in the synchronization channel according to its own network connection status and/or information of the reference synchronization source includes, but is not limited to, at least one of the following information:

The cell ID (IDentity, ID) of the serving cell where the sending device is located;

The radio frame and/or subframe number of the synchronization channel sent by the sending device;

Indicates that the sending device is located within the network connection;

The indication that the reference synchronization source of the sending device is the network side device;

Mode 2: When the sending device is located outside the network connection and the reference synchronization source of the sending device is the network side device, the sending device sends the synchronization information on the synchronization channel corresponding to the synchronization signal. That is, if the transmission is set If the reference synchronization source that is currently located outside the network connection and the transmitting device is the network side device, the sending device sends the synchronization information on the synchronization channel corresponding to the synchronization signal.

Indicates that the sending device is located outside the network connection;

The current number of times the synchronization signal of the sending device is forwarded;

Mode 3: When the sending device is currently located outside the network connection and the reference synchronization source of the sending device is itself, the sending device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal. That is, if the sending device is currently located outside the network connection and the reference synchronization source of the transmitting device is itself, the transmitting device determines to send the synchronization information on the synchronization channel corresponding to the synchronization signal.

Indicates that the sending device is located outside the network connection;

The reference synchronization source used to indicate the sending device is the indication information of the sending device itself;

Mode 4: When the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS, the sending device determines to send synchronization information on the synchronization channel corresponding to the synchronization signal. That is, if the sending device is currently located outside the network connection and the reference synchronization source of the transmitting device is another user equipment or GPS, the transmitting device determines to send synchronization information on the synchronization channel corresponding to the synchronization signal.

Indicates that the sending device is located outside the network connection;

Mode 5: When the sending device is currently located outside the network connection and the current forwarding number of the synchronization signal of the reference synchronization source of the sending device does not exceed the set threshold, the sending device sends the synchronization information on the synchronization channel corresponding to the synchronization signal. That is, if the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection does not exceed the set threshold, the transmitting device sends the synchronization information on the synchronization channel corresponding to the synchronization signal.

Indicates that the sending device is located outside the network connection;

The current number of times the synchronization signal corresponding to the synchronization channel sent by the sending device is forwarded;

Manner 6: When the sending device is currently located outside the network connection and the reference synchronization source of the sending device is not itself, the sending device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal. That is, if the transmitting device is currently located outside the network connection and the reference synchronization source of the transmitting device is not itself, the transmitting device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.

Mode 7, the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device exceeds the set At the threshold, the transmitting device determines that the synchronization information is not transmitted on the synchronization channel corresponding to the synchronization signal. That is, if the current number of times of the synchronization signal of the reference synchronization source of the transmitting device exceeds the set threshold, the transmitting device determines that the synchronization information is not transmitted on the synchronization channel corresponding to the synchronization signal.

In the embodiment of the present application, the sending device may determine whether to send the synchronization information on the synchronization channel corresponding to the synchronization signal according to any one of the foregoing manners 1-7. It should be noted that only a few preferred embodiments are provided in the above, and the embodiment of the present application is not limited to the foregoing manner, and may also include other manners, such as when the sending device is currently located in the network connection, and the sending device corresponds to the synchronization signal. The synchronization information is sent on the synchronization channel; for example, when the sending device is currently located outside the network connection, the sending device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; and the like.

In an implementation, in order to reduce the detection complexity of the user equipment, the structure of the synchronization channel sent by different user equipments (ie, user equipments having different network connection states and/or information of reference synchronization sources) in the embodiment of the present application is preferred. The same, that is, the synchronization channels transmitted by different user equipments have the same bit length (denoted as N).

Further, in order to enable different user equipments to send the synchronization channel of the same structure, preferably, in step 33, the sending device determines, according to its own network connection status and/or information of the reference synchronization source, synchronization information that needs to be sent in the synchronization channel, including :

The sending device determines, according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, the synchronization information that needs to be sent in the synchronization channel, where the information length of the synchronization channel is N bits, N Is a positive integer. In addition, the correspondence between the network connection status and/or the information of the reference synchronization source and the synchronization information carried by the synchronization channel includes: a correspondence between the network connection status and the synchronization information carried by the synchronization channel; or, the reference synchronization source information and the synchronization channel The correspondence between the carried synchronization information; or the correspondence between the network connection status and the reference synchronization source information and the synchronization information carried by the synchronization channel.

In the embodiment of the present application, different network connection states and/or information of the reference synchronization source correspond to different synchronization information, so that different user equipments can use the same structure of the synchronization channel to carry different synchronization information, and the transmission is guaranteed. On the premise of the flexibility of the synchronization information, the detection complexity of the receiving device is also reduced, that is, the receiving device uses the same length for detecting the synchronization channel.

Based on the foregoing embodiment, preferably, the sending device may implicitly indicate the meaning of the synchronization information of the remaining N-k bits in the synchronization channel by using the synchronization information of the k bits in the synchronization channel, and specifically includes the following three implementation manners:

Manner 1: The sending device indicates the meaning of the synchronization information of the last N-k bits carried in the synchronization channel by using the synchronization information of the first k bits carried in the synchronization channel.

In this manner, preferably, the first k bit information carried in the synchronization channel includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device, thereby connecting the states through different networks. Information and/or information of the reference synchronization source of the transmitting device, implicitly indicating the meaning of the synchronization information of the last Nk bits carried in the synchronization channel, so that the receiving device can be based on the synchronization channel after detecting the synchronization channel The synchronization information of the first k bits is used to obtain the meaning of the synchronization information of the Nk bits, thereby determining the synchronization information of the Nk bits.

For example, if the synchronization information of the first k bits in the synchronization channel indicates that the sending device is located in the network connection and the reference synchronization source of the sending device is the network side device, the synchronization information of the last Nk bits is the D2D of the serving cell where the sending device is located. The resource configuration information and the radio frame and/or subframe number in which the synchronization channel is located.

Manner 2: The sending device indicates the meaning of the synchronization information of the first N-k bits of the synchronization channel by using the synchronization information of the last k bits in the synchronization channel.

In this manner, preferably, the synchronization information of the last k bits in the synchronization channel includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device.

Manner 3: The transmitting device indicates the meaning of the synchronization information of the remaining N-k bits of the synchronization channel by using the synchronization information of the middle k bits in the synchronization channel.

In this manner, preferably, the synchronization information of the middle k bits in the synchronization channel includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device.

In the above three preferred implementation manners, if the number of bits of the synchronization information determined by the sending device is less than N, the method further includes:

The transmitting device adds zeros to the synchronization information carried in the synchronization channel, so that the number of bits of the synchronization information carried in the synchronization channel is N.

Based on the same inventive concept, the embodiment of the present application further provides a method for detecting synchronization information. Referring to FIG. 4, the method includes the following steps:

Step 41: The receiving device detects the synchronization signal.

Step 42: After detecting the synchronization signal, the receiving device detects synchronization information on the synchronization channel corresponding to the synchronization signal, and the receiving device determines, according to whether the synchronization information is detected, the network connection status of the transmitting device that sends the synchronization signal and/or the reference synchronization source. information.

The information of the reference synchronization source of the transmitting device includes but is not limited to at least one of the following information: information indicating the type of the reference synchronization source of the transmitting device (such as the network side device, other user devices, the transmitting device itself, GPS, etc.) And information for indicating the number of times the synchronization signal of the reference synchronization source of the transmitting device is currently forwarded.

Step 43: When detecting the synchronization information, the receiving device determines, according to the detected synchronization information, a synchronization reference used by the receiving device to transmit or receive the device to the device D2D signal. That is, if the receiving device detects the synchronization information, the receiving device determines, according to the detected synchronization information, the synchronization reference used by the receiving device itself to transmit or receive the device-to-device D2D signal.

In the embodiment of the present application, the receiving device detects the synchronization signal; after detecting the synchronization signal, the receiving device detects the synchronization information on the synchronization channel corresponding to the synchronization signal, and determines the network connection status of the sending device that sends the synchronization signal according to whether the synchronization information is detected. And/or referring to information of the synchronization source; upon detecting the synchronization information, the receiving device determines, according to the detected synchronization information, a synchronization reference used by the receiving device itself to transmit or receive the device-to-device D2D signal. Therefore, a detection scheme for synchronizing information in a D2D application scenario is provided, and the receiving device can learn the network connection status of the transmitting device and/or the information of the reference synchronization source according to whether the synchronization information is detected, and according to the detected synchronization information. The synchronization reference used by the receiving device to transmit or receive the D2D signal is determined, thereby ensuring synchronization of the D2D transmission of the transmitting device and the receiving device, and expanding the synchronization range.

a cell ID of the serving cell where the sending device is located;

In an implementation, in step 42, the receiving device determines, according to whether the synchronization information is detected, the network connection status of the transmitting device that sends the synchronization signal and/or the information of the reference synchronization source, including the following seven preferred modes:

Mode A: If the receiving device detects the synchronization information, it is determined that the sending device that sends the synchronization signal is currently located in the network connection, and the reference synchronization source of the sending device is the network side device. For details, refer to the foregoing manner 1.

In the mode B, if the receiving device detects the synchronization information, it is determined that the sending device that sends the synchronization signal is currently located outside the network connection, and the reference synchronization source of the sending device is the network side device. For details, refer to the foregoing mode 2.

In the mode C, if the receiving device detects the synchronization information, it is determined that the sending device that sends the synchronization signal is currently located outside the network connection, and the reference synchronization source of the sending device is the transmitting device itself. For details, refer to the foregoing manner 3.

In the mode D, if the receiving device detects the synchronization information, it is determined that the sending device that sends the synchronization signal is currently located outside the network connection, and the reference synchronization source of the sending device is a user equipment or a GPS other than the sending device itself. 4.

In the mode E, if the receiving device detects the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection of the sending device that sends the synchronization signal is not If the threshold is exceeded, refer to the above method 5.

In the mode F, if the receiving device does not detect the synchronization information, it is determined that the reference synchronization source of the sending device that sends the synchronization signal is not the transmitting device itself and the sending device is located outside the network connection. For details, refer to the foregoing manner 6.

In the mode G, if the receiving device does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that sends the synchronization signal exceeds the set threshold. For details, refer to the foregoing manner 7.

In the embodiment of the present application, the receiving device may determine the network connection status of the sending device and/or the information of the reference synchronization source according to any one of the foregoing manners A to G. It should be noted that only a few preferred embodiments are provided in the foregoing. The embodiment of the present application is not limited to the foregoing manner, and may also include other manners. If the receiving device does not detect the synchronization information, it is determined to send the synchronization signal. The reference synchronization source of the device is not the transmitting device itself; for example, if the receiving device does not detect the synchronization information, it is determined that the sending device that sends the synchronization signal is outside the network connection; if, for example, the receiving device does not detect the synchronization information, it is determined to send the The current number of times of the synchronization signal of the reference synchronization source of the transmitting device of the synchronization signal exceeds the set threshold; and so on.

In an implementation, after the receiving device detects the synchronization information in step 43, the method further includes: acquiring synchronization information on the synchronization channel, where the receiving device acquires synchronization information on the synchronization channel, including:

The receiving device determines the synchronization information on the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel. The receiving device determines the synchronization information on the synchronization channel according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel. Alternatively, the receiving device determines the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel. Synchronizing information on the synchronization channel; or determining, by the receiving device, the correspondence between the network connection status and the reference synchronization source information and the synchronization information carried by the synchronization channel Synchronization information on the synchronization channel. The information length of the synchronization channel is N bits, and N is a positive integer.

In an implementation, preferably, the receiving device acquires synchronization information on the synchronization channel, and includes the following three preferred implementation manners:

The receiving device learns the meaning of the synchronization information of the first N-k bits in the synchronization channel by using the synchronization information of the last k bits in the detected synchronization channel; or

The receiving device learns the meaning of the synchronization information of the remaining N-k bits in the synchronization channel by using the synchronization information of the middle k bits in the detected synchronization channel;

The information carried by the synchronization channel has a length of N bits, and N is a positive integer.

In the embodiment of the present application, the synchronization information of the remaining Nk bits can be implicitly indicated by the synchronization information of the k bits in the synchronization channel, thereby reducing the detection complexity of the receiving device, that is, the receiving device uses the same length. Detection of the synchronization channel.

Preferably, the synchronization information of the k bits in the synchronization channel includes information indicating a network connection state of the transmitting device transmitting the synchronization signal and/or information of a reference synchronization source of the transmitting device.

For example, if the synchronization information of the first k bits of the synchronization channel detected by the receiving device indicates that the reference synchronization source of the transmitting device that sends the synchronization signal is the network side device and the transmitting device is located in the network connection, the receiving device determines the synchronization channel. The synchronization information of the last Nk bits includes D2D resource configuration information; or

If the synchronization information of the first k bits of the synchronization channel detected by the receiving device indicates that the reference synchronization source of the transmitting device that transmits the synchronization signal is the network side device and the transmitting device is located outside the network connection, the receiving device determines the last Nk of the synchronization channel. The synchronization information of the bits includes the current forwarding number information of the synchronization signal; or

If the synchronization information of the first k bits of the synchronization channel detected by the receiving device indicates that the reference synchronization source of the transmitting device that sends the synchronization signal is the network side device and the current number of times of the synchronization signal of the reference synchronization source does not exceed the set threshold, Then the receiving device determines the last Nk bits of the synchronization channel The synchronization information includes D2D resource configuration information; or,

If the synchronization information of the first k bits of the synchronization channel detected by the receiving device indicates that the reference synchronization source of the transmitting device that transmits the synchronization signal is another user equipment or GPS, the receiving device determines that the synchronization information of the last Nk bits of the synchronization channel includes the Referring to the synchronization maintenance time information of the synchronization source or the current number of times of the synchronization signal of the reference synchronization source; or

If the synchronization information of the first k bits of the synchronization channel detected by the receiving device indicates that the reference synchronization source of the transmitting device that transmits the synchronization signal is the transmitting device itself, the receiving device determines that the synchronization information of the last Nk bits of the synchronization channel includes the transmission. The D2D resource configuration information of the cluster where the device is located or the synchronization maintenance time information of the reference synchronization source.

The method for transmitting and detecting synchronization information provided by the present application will be described in detail below in conjunction with two specific embodiments.

Embodiment 1 It is assumed that both UE1 and UE2 are within the network coverage and belong to different cells that are synchronized; UE3 and UE4 are outside the network coverage. The UE1, the UE2, and the UE3 send a synchronization signal, and the UE4 receives the synchronization signal. For details, see FIG.

1. UE1 to UE3 respectively send synchronization signals on the agreed physical resources according to the synchronization reference obtained from the reference synchronization source.

Specifically, UE1 and UE2 obtain synchronization references from downlink synchronization signals of cell 1 and cell 2, respectively; and synchronization reference obtained by UE3 from GPS.

2. The UE1 to the UE3 determine whether to transmit the synchronization information on the synchronization channel corresponding to the synchronization signal according to the information of the network connection state and/or the reference synchronization source, and determine the need when the synchronization information is sent on the synchronization channel corresponding to the synchronization signal. Synchronization information sent on the synchronization channel.

It is assumed that only the UE in the network coverage transmits the synchronization information on the synchronization channel corresponding to the synchronization signal, and the synchronization channel carries the D2D resource configuration information of the serving cell of the UE and the radio frame and subframe number of the transmitted synchronization channel; The UE outside the network coverage does not transmit the synchronization information on the synchronization channel corresponding to the synchronization signal. then:

a) UE1 and UE2 determine to transmit synchronization information on the synchronization channel corresponding to the synchronization signal according to the above principle, and the synchronization frame carries the radio frame and subframe number where the synchronization channel is located, and UE1 and UE2 D2D resource configuration information of the serving cell in which it is located;

b) The UE3 determines that the synchronization information is not transmitted on the synchronization channel corresponding to the synchronization signal according to the above principle.

3. The UE1 to the UE2 generate synchronization information according to the determined synchronization information, and send the generated synchronization information through the synchronization channel on the agreed physical resource.

4. The UE4 detects the synchronization signals sent by the UE1 to the UE3, and detects the synchronization information on the synchronization channel corresponding to each synchronization signal.

The UE4 detects the synchronization information sent by the UE1 and the UE2, and determines that the UE1 and the UE2 are the UEs in the network coverage, and the information carried in the synchronization channel is the radio frame and the subframe number where the synchronization channel is located, and the serving cell where the UE1 and the UE2 are located. D2D resource configuration information; UE4 does not detect the synchronization information sent by UE3, and determines that UE3 is a UE outside the network coverage.

5. The UE4 obtains the D2D resource configuration information of the cell in which the cell is located according to the synchronization information carried in the synchronization channel corresponding to the synchronization signals of the UE1 and the UE2, and obtains the synchronization reference in combination with the synchronization signal, and detects the D2D signal on the corresponding D2D resource. The UE4 detects the D2D signal on the agreed physical resources of the UE outside the network coverage according to the synchronization reference obtained by the synchronization signal of the UE3.

Embodiment 2: It is assumed that UE1 is within the network coverage and belongs to the cell 1; UE2, UE3, and UE4 are outside the network coverage. The UE1, the UE2, and the UE3 send a synchronization signal, and the UE4 receives the synchronization signal. For details, refer to FIG. 6.

Specifically, UE1 and UE2 obtain synchronization reference from cell 1 and cell 2, respectively; and synchronization reference obtained by UE3 from the cluster head UE. Generally, in the case of no network, there is a cluster head in a cluster adjacent to each other to transmit a synchronization signal, so that surrounding UEs can synchronize with each other to obtain D2D transmission.

2. The UE1 to the UE3 determine the synchronization information carried by the synchronization channel corresponding to the synchronization signal according to the network connection status and/or the information of the reference synchronization source.

Specifically, the UE1 is in the network coverage, and the reference synchronization source is the eNB, and the synchronization channel carries the same. The D2D resource configuration information of the serving cell and the radio frame/subframe number of the synchronization channel; if the UE2 is not in the network coverage and the reference synchronization source is the eNB, the synchronization number of the synchronization signal carrying the reference synchronization source in the synchronization channel; The UE3 is not in the network coverage, and its reference synchronization source is the cluster head UE, and the synchronization channel carries the synchronization maintenance time information of the reference synchronization source of the UE3.

3. UE1 to UE3 generate corresponding synchronization information, and send the generated synchronization information through the synchronization channel on the agreed physical resource; specifically, the structure of the synchronization information sent in the synchronization channel is as shown in Table 1:

Table 1

If the synchronization information carried by the latter N-k bits in the synchronization channel is less than N-k bits, zero-padding is performed after the synchronization information until N-k bits.

4. The UE4 detects the synchronization signals sent by the UE1 to the UE3, and detects the synchronization channel of the N-bit length corresponding to each synchronization signal.

Specifically, the UE4 learns the information about the reference synchronization source of the UE1 to UE3 or the network connection status according to the synchronization information of the first k bits in the synchronization channel, and determines the indication content of the synchronization information of the following N-k bits. Thus, the complete synchronization information of the N bits transmitted by UE1 to UE3 is known.

a) UE4 detects the synchronization channel of UE1, and determines that UE1 is a UE within the network coverage according to the synchronization information of the first k bits of the synchronization channel, and learns that the synchronization information of the last Nk bits in the synchronization channel is the wireless location of the synchronization channel. Frame and subframe number, and D2D resources of the serving cell where UE1 is located Source configuration information;

b) The UE4 detects the synchronization channel of the UE2, and determines that the UE2 is a UE outside the network coverage according to the synchronization information of the first k bits of the synchronization channel, and the reference synchronization source is the eNB, and learns the synchronization of the Nk bits in the synchronization channel. The information is the current number of times of the synchronization signal of the reference synchronization source (and the corresponding zero padding);

c) UE4 detects the synchronization channel of UE3, and determines that UE3 is a UE outside the network coverage according to the synchronization information of the first k bits of the synchronization channel, and the reference synchronization source is the UE, and learns the synchronization of the last Nk bits in the synchronization channel. The information is the synchronization maintenance time information (and the corresponding zero padding bits) of the reference synchronization source.

5. The UE4 determines, according to the obtained synchronization information, a synchronization reference used by the UE to transmit and receive the synchronization signal and the D2D signal, and determines, according to the obtained D2D resource configuration information, the physical resource used by the D2D signal to receive the cell.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, the embodiment of the present application further provides a device for transmitting synchronization information. Since the principle of solving the problem is similar to the method for transmitting synchronization information shown in FIG. 3, the implementation of the device can be referred to the method. Implementation, repetition will not be repeated.

Referring to FIG. 7, a device for sending synchronization information according to an embodiment of the present application includes:

a sending module 71, configured to send a synchronization signal;

The first processing module 72 is configured to determine, according to the network connection status of the sending device and/or the information of the reference synchronization source, whether to send the synchronization information on the synchronization channel corresponding to the synchronization signal;

The second processing module 73 is configured to determine, when the first processing module 72 determines to send the synchronization information on the synchronization channel, the synchronization that needs to be sent in the synchronization channel according to the network connection status of the sending device and/or the information of the reference synchronization source. The determined synchronization information is transmitted through the synchronization channel on the information and the agreed physical resources. That is, if the first processing module 72 determines to transmit synchronization information on the synchronization channel, the second processing module 73 determines, according to the network connection status of the transmitting device itself and/or the information of the reference synchronization source, that the synchronization channel needs to be determined. Synchronization information sent in, and in the agreed physical assets The determined synchronization information is transmitted on the source through the synchronization channel.

In an implementation, the first processing module 72 is specifically configured to:

If the device is currently located outside the network connection and the reference synchronization source of the device is the transmitting device itself, determining to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is a user equipment or a GPS other than the transmitting device itself, determining to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is not the transmitting device itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

In an implementation, the second processing module 73 is specifically configured to:

Determining, according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, synchronization information that needs to be sent in the synchronization channel; wherein the number of bits of the synchronization information is N, N is A positive integer. That is, the second processing module 73 determines the synchronization information that needs to be sent in the synchronization channel according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel; or the second processing module 73 is based on the information of the reference synchronization source and the synchronization channel. Corresponding relationship of the synchronization information carried, determining the synchronization information to be sent in the synchronization channel; or the correspondence between the second connection processing module 73 and the synchronization information carried by the synchronization channel according to the network connection status and the information of the reference synchronization source, The synchronization information that needs to be transmitted in the synchronization channel is determined.

In an implementation, preferably, the second processing module 73 is specifically configured to:

In an implementation, the second processing module 73 is further configured to:

If the number of bits of the synchronization information determined by the sending device is less than N, the synchronization information carried in the synchronization channel is followed by zeros, so that the number of bits of the synchronization information carried in the synchronization channel is N.

a cell ID of the serving cell where the sending device is located;

Based on the same inventive concept, the embodiment of the present application further provides a synchronization information detecting apparatus. Since the principle of solving the problem is similar to the method of detecting the synchronization information shown in FIG. 4, the implementation of the apparatus can be referred to the method. Implementation, repetition will not be repeated.

As shown in FIG. 8, a synchronization information detecting apparatus provided by an embodiment of the present application includes:

a first detecting module 81, configured to detect a synchronization signal;

The second detecting module 82 is configured to detect synchronization information on the synchronization channel corresponding to the synchronization signal after the first detection module 81 detects the synchronization signal;

The processing module 83 is configured to determine, according to whether the synchronization information is detected by the second detection module 82, the network connection status of the transmitting device that sends the synchronization signal and/or the information of the reference synchronization source; and the second detection module 82 detects the location When the synchronization information is described, the synchronization reference used by the detection device itself to transmit or receive the device-to-device D2D signal is determined based on the synchronization information. That is, the processing module 83 determines, according to whether the second detection module 82 detects the synchronization information, the network connection status of the transmitting device that sends the synchronization signal and/or the information of the reference synchronization source; and if the second detection module detects 82 to the synchronization information, the processing module 83 determines, according to the synchronization information, a synchronization reference used by the detection device itself to transmit or receive the device-to-device D2D signal.

In an implementation, the processing module 83 is specifically configured to:

If the second detection module 82 detects the synchronization information, it is determined that the sending device is currently located in the network connection and the reference synchronization source of the sending device is a network side device; or

If the second detection module 82 detects the synchronization information, it is determined that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is a network side device; or

If the second detection module 82 detects the synchronization information, it is determined that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the sending device itself; or

If the second detection module 82 detects the synchronization information, it is determined that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or ,

If the second detection module 82 detects the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection does not exceed the set threshold; or

If the second detection module 82 does not detect the synchronization information, it is determined that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the second detection module 82 does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device exceeds a set threshold.

In an implementation, the processing module 83 is further configured to: after the second detection module 82 detects the synchronization information, acquire synchronization information on the synchronization channel; the processing module 83 acquires synchronization information on the synchronization channel, including :

Determining the synchronization information carried in the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the number of information bits carried by the synchronization channel is N, N Is a positive integer. That is, the processing module 83 determines the synchronization information carried in the synchronization channel according to the correspondence between the network connection state and the synchronization information carried by the synchronization channel; or the processing module 83 uses the synchronization information carried by the synchronization channel according to the information of the reference synchronization source. Corresponding relationship, the synchronization information carried in the synchronization channel is determined; or the processing module 83 determines, according to the correspondence between the network connection state and the reference synchronization source information and the synchronization information carried by the synchronization channel, Synchronization information.

In an implementation, the processing module 83 obtains synchronization information on the synchronization channel, including:

Obtaining, by using the synchronization information of the first k bits in the synchronization channel detected by the second detection module 82, the meaning of the synchronization information of the last N-k bits of the synchronization channel; or

Obtaining, by using the synchronization information of the last k bits in the synchronization channel detected by the second detection module 82, the meaning of the synchronization information of the first N-k bits in the synchronization channel; or

Obtaining the meaning of the synchronization information of the remaining Nk bits in the synchronization channel by using the synchronization information of the middle k bits in the synchronization channel detected by the second detection module 82; wherein the information length of the synchronization channel is carried N bits, N is a positive integer.

a cell ID of the serving cell where the sending device is located;

The structure and processing manner of the user equipment provided by the embodiment of the present application are described below in conjunction with the preferred hardware structure.

Referring to Figure 9, the user equipment includes a transceiver 91, and at least one processor 92 coupled to the transceiver 91, wherein:

1. If the user equipment is a sending device for synchronization information;

The transceiver 91 is configured to transmit a synchronization signal;

The processor 92 is configured to determine, according to the network connection status of the user equipment itself and/or the information of the reference synchronization source, whether to send synchronization information on the synchronization channel corresponding to the synchronization signal, when determining to send synchronization information on the synchronization channel Determining, according to the network connection status of the user equipment itself and/or the information of the reference synchronization source, the synchronization information that needs to be sent in the synchronization channel, and triggering the transceiver 91 to transmit the determined information on the agreed physical resource through the synchronization channel. Synchronization information. That is, the processor 92 determines whether to send synchronization information on the synchronization channel corresponding to the synchronization signal according to the network connection status of the user equipment and/or the information of the reference synchronization source, and if it is determined to send the synchronization information on the synchronization channel, according to the user equipment. The network connection status and/or information of the reference synchronization source determines synchronization information that needs to be transmitted in the synchronization channel, and triggers the transceiver 91 to transmit the determined synchronization information over the synchronization channel on the agreed physical resource.

In implementation, processor 92 is configured to:

When the user equipment is currently located in the network connection and the reference synchronization source of the user equipment is the network side device, it is determined that the synchronization information is sent on the synchronization channel corresponding to the synchronization signal; or the user equipment is currently located outside the network connection. And the reference synchronization source of the user equipment is a network side device. Determining that the synchronization information is sent on the synchronization channel corresponding to the synchronization signal; or, when the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is the user equipment itself, determining that the synchronization signal corresponds to The synchronization information is sent on the synchronization channel; or the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is a user equipment other than the user equipment itself or GPS, determining that the synchronization signal corresponds to Synchronizing information is sent on the synchronization channel; or, when the user equipment is currently located outside the network connection and the current number of times of the synchronization signal of the reference synchronization source of the user equipment does not exceed the set threshold, it is determined that the synchronization signal corresponds to The synchronization information is sent on the synchronization channel; or the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is not the user equipment itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or The current rotation of the synchronization signal of the reference synchronization source of the user equipment When the number exceeds a set threshold, the synchronization channel is determined not to send the synchronization signal corresponding to the synchronization information. That is, if the user equipment is currently located in the network connection and the reference synchronization source of the user equipment is the network side device, the processor 92 determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or, if the user If the device is located outside the network connection and the reference synchronization source of the user equipment is the network side device, the processor 92 determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or if the user equipment is currently located in the network connection And the reference synchronization source of the user equipment is the user equipment itself, the processor 92 determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or if the user equipment is currently located outside the network connection and the user The reference synchronization source of the device is a user equipment or a GPS other than the user equipment itself, and the processor 92 determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or, if the user equipment is currently located outside the network connection And the current forwarding number of the synchronization signal of the reference synchronization source of the user equipment does not exceed the set a value, the processor 92 determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or, if the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is not the user equipment itself, the processor Determining not to transmit synchronization information on a synchronization channel corresponding to the synchronization signal; or, if the current number of times of synchronization of the synchronization signal of the reference synchronization source of the user equipment exceeds a set threshold, the processor 92 determines that the synchronization is not The synchronization information is transmitted on the synchronization channel corresponding to the signal.

In implementation, processor 92 is configured to:

Determining, according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, synchronization information that needs to be sent in the synchronization channel; wherein the number of bits of the synchronization information is N, N is A positive integer. That is, the processor 92 is configured to: determine, according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel, the synchronization information that needs to be sent in the synchronization channel; or, according to the information of the reference synchronization source and the synchronization channel Corresponding relationship of the synchronization information, determining synchronization information to be transmitted in the synchronization channel; or determining, according to the correspondence between the network connection state and the reference synchronization source information and the synchronization information carried by the synchronization channel, determining the synchronization Synchronization information sent in the channel.

In an implementation, preferably, the processor 92 is configured to:

In an implementation, if the number of bits of the synchronization information determined by the sending device is less than N, the processor 92 is further configured to:

a cell ID of the serving cell where the sending device is located;

The transceiver 91 is configured to detect a synchronization signal; after detecting the synchronization signal, detecting synchronization information on a synchronization channel corresponding to the synchronization signal;

The processor 92 is configured to determine, according to whether the transceiver 91 detects the synchronization information, the network connection status of the transmitting device transmitting the synchronization signal and/or the information of the reference synchronization source; when the transceiver 91 detects the synchronization information Determining, according to the synchronization information, a synchronization reference used by the user equipment to transmit or receive the device to the device D2D signal; that is, if the transceiver 91 detects the synchronization information, the processor 92 determines the user equipment according to the synchronization information. The synchronization reference used by the device to send or receive the device to the device D2D signal.

In an implementation, the processor 92 determines, according to whether the synchronization information is detected, the network connection status of the sending device and/or the information of the reference synchronization source, including:

When the synchronization information is detected, it is determined that the sending device is currently located in the network connection and the reference synchronization source of the sending device is a network side device; or, when the synchronization information is detected, determining that the sending device is currently located in the network And the reference synchronization source of the sending device is a network side device; or, when the synchronization information is detected, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is the sending device itself; Or, when the synchronization information is detected, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a user equipment or a GPS other than the sending device itself; or detecting the synchronization Determining, when the information is not in the network connection, the current number of times of the synchronization signal of the reference synchronization source of the sending device does not exceed a set threshold; or, when the synchronization information is not detected, determining the The reference synchronization source of the transmitting device is not the transmitting device and the transmitting device is located in the network Alternatively, when the synchronization information is not detected, it is determined that the current number of times of the synchronization signal of the reference synchronization source of the transmitting device exceeds a set threshold. That is, if the transceiver 91 detects the synchronization information, the processor 92 determines that the sending device is currently located in the network connection and the reference synchronization source of the sending device is a network side device; The processor 91 detects the synchronization information, and the processor 92 determines that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is a network side device; or if the transceiver 91 detects the location Referring to the synchronization information, the processor 92 determines that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the transmitting device itself; or, if the transceiver 91 detects the synchronization information, The processor 92 determines that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or if the transceiver 91 detects The synchronization information, the processor 92 determines the current forwarding time of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection Not exceeding the set threshold; or, if the transceiver 91 does not detect the synchronization information, the processor 92 determines that the reference synchronization source of the transmitting device is not the transmitting device and the transmitting device is located in a network connection Alternatively, if the transceiver 91 does not detect the synchronization information, the processor 92 determines that the current number of times the synchronization signal of the reference synchronization source of the transmitting device exceeds the set threshold.

In an implementation, the processor 92 is further configured to acquire synchronization information on the synchronization channel after the transceiver 91 detects the synchronization information; wherein the processor 92 acquires synchronization on the synchronization channel. Information, including:

Determining the synchronization information carried in the synchronization channel according to the network connection status and/or the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; wherein the number of information bits carried by the synchronization channel is N, N Is a positive integer. That is, the processor 92 determines the synchronization information carried in the synchronization channel according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel; or the processor 92 determines the synchronization information carried by the synchronization channel according to the information of the reference synchronization source. Corresponding relationship, the synchronization information carried in the synchronization channel is determined; or the processor 92 determines the correspondence between the network connection state and the information of the reference synchronization source and the synchronization information carried by the synchronization channel. Synchronization information carried in the synchronization channel.

In an implementation, preferably, the processor 92 acquires synchronization information on the synchronization channel, including:

a cell ID of the serving cell where the sending device is located;

Based on the foregoing method and device for transmitting synchronization information, the embodiment of the present application provides a user equipment, which is used as a device or device for transmitting synchronization information. As shown in FIG. 10, the user equipment includes: Machine 101, processor 102, memory 103; further comprising a bus interface 104 and a user interface 105;

The transceiver 101 is configured to send a synchronization signal;

The processor 102 is configured to read a program in the memory, and execute the following process: Determining whether to transmit synchronization information on a synchronization channel corresponding to the synchronization signal, and determining whether to send synchronization information on the synchronization channel according to the network connection status of the user equipment and/or the information of the reference synchronization source; a connection status and/or information of a reference synchronization source, determining synchronization information to be transmitted in the synchronization channel, and transmitting the determined synchronization information over the synchronization channel on an agreed physical resource;

The memory 103 is configured to store one or more executable programs, which are used to configure the processor.

In FIG. 10, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 102 and various circuits of memory represented by memory 103. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. Transceiver 101 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. The processor 102 is responsible for managing the bus architecture and general processing, and the memory 103 can store data used by the processor 102 in performing operations. Bus interface 104 provides an interface. For different user equipments, the user interface 105 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

In an embodiment, preferably, the processor 102 is specifically configured to:

If the user equipment is currently located in the network connection and the reference synchronization source of the user equipment is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is the user equipment itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is another user equipment or GPS other than the user equipment itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or ,

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is the same If the current number of times of forwarding of the step signal does not exceed the set threshold, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is not the user equipment itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

And if the current forwarding number of the synchronization signal of the reference synchronization source of the user equipment exceeds a set threshold, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.

In an embodiment, preferably, the processor 102 is specifically configured to:

Determining synchronization information that needs to be sent in the synchronization channel according to a correspondence between a network connection state and synchronization information carried by the synchronization channel;

Determining synchronization information that needs to be sent in the synchronization channel according to a correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel;

The synchronization information that needs to be sent in the synchronization channel is determined according to the correspondence between the network connection status and the reference synchronization source and the synchronization information carried by the synchronization channel.

In an embodiment, preferably, the processor 102 is specifically configured to:

And indicating, by using synchronization information of the first k bits carried in the synchronization channel, a meaning of synchronization information of the last N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the last k bits carried in the synchronization channel, a meaning of synchronization information of the first N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the middle k bits carried in the synchronization channel, a meaning of synchronization information of remaining N-k bits carried in the synchronization channel;

The number of information bits carried by the synchronization channel is N, and N is a positive integer.

In an embodiment, preferably, the k-bit synchronization information includes information indicating a network connection status of the user equipment and/or information of a reference synchronization source of the user equipment.

In an embodiment, preferably, the processor 102 is further configured to:

If the number of bits of the synchronization information determined by the user equipment is less than N, the synchronization information carried in the synchronization channel is padded with zeros, so that the number of bits of the synchronization information carried in the synchronization channel is N.

a cell ID of the serving cell where the user equipment is located;

D2D resource configuration information of the serving cell where the user equipment is located;

Instructing information indicating whether the user equipment is located in a network connection;

Instructing information indicating a reference synchronization source type of the user equipment;

The current number of times the synchronization signal is sent by the user equipment;

D2D resource configuration information of the cluster where the user equipment is located;

Synchronization maintenance time information for indicating a reference synchronization source of the user equipment;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the user equipment is located;

The information carried by the synchronization channel sent by the reference synchronization source detected by the user equipment.

Based on the method and device for detecting synchronization information provided by the foregoing embodiments, the embodiment of the present application provides a user equipment, as shown in FIG. 11, the user equipment is used as a detection device or device for synchronization information, and the user equipment includes: The machine 111, the processor 112, the memory 113; further includes a bus interface 114 and a user interface 115;

The transceiver 111 is configured to detect a synchronization signal, and after detecting the synchronization signal, detect synchronization information on a synchronization channel corresponding to the synchronization signal;

The processor 112 is configured to read a program in the memory, and perform the following process: determining, according to whether the transceiver 111 detects the synchronization information, determining a network connection status of a transmitting device that sends a synchronization signal, and/or Referring to the information of the synchronization source; and if the transceiver 111 detects the synchronization information, determining, according to the synchronization information, a synchronization reference used by the user equipment to transmit or receive the device-to-device D2D signal;

The memory 113 is configured to store one or more executable programs, which are used to configure the processor.

Wherein, in FIG. 11, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 112 and various circuits of memory represented by memory 113. The bus architecture can also be used such as peripherals, voltage regulators, and power management circuits. Various other circuits are linked together, which are well known in the art and, therefore, will not be further described herein. Transceiver 111 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 112 is responsible for managing the bus architecture and general processing, and the memory 113 can store data used by the processor 1102 in performing operations. Bus interface 114 provides an interface. For different user equipments, the user interface 115 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

In an embodiment, preferably, the processor 112 is specifically configured to:

If the transceiver detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the transceiver detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the transceiver detects the synchronization information, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the sending device itself; or

If the transceiver detects the synchronization information, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or ,

If the transceiver detects the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device that is currently located outside the network connection does not exceed a set threshold; or

If the transceiver does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the transceiver does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.

In an embodiment, the processor 112 is further configured to: after the transceiver detects the synchronization information, acquire synchronization information on the synchronization channel;

The processor acquires synchronization information on the synchronization channel, including: according to a network connection Determining the synchronization information carried in the synchronization channel according to the correspondence between the connection state and the synchronization information carried in the synchronization channel; or determining the synchronization channel according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel Synchronization information carried in the synchronization channel; or, according to the correspondence between the network connection status and the reference synchronization source information and the synchronization information carried by the synchronization channel, the synchronization information carried in the synchronization channel is determined; the information bits carried by the synchronization channel The number is N and N is a positive integer.

In an embodiment, preferably, the processor 112 is specifically configured to:

Obtaining the meaning of the synchronization information of the last N-k bits of the synchronization channel by using the synchronization information of the first k bits in the synchronization channel detected by the transceiver; or

Obtaining, by the transceiver, synchronization information of the last k bits in the synchronization channel, and knowing the meaning of synchronization information of the first N-k bits in the synchronization channel; or

Obtaining, by the transceiver, synchronization information of the middle k bits in the synchronization channel, and knowing the meaning of synchronization information of the remaining N-k bits in the synchronization channel;

In an embodiment, preferably, the k-bit synchronization information includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device.

a cell ID of the serving cell where the sending device is located;

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the application are claimed in the present application The present application is also intended to cover such modifications and variations within the scope of the invention.

Claims

A method for transmitting synchronization information, characterized in that the method comprises:

The transmitting device sends a synchronization signal;

Determining, by the sending device, whether to send synchronization information on a synchronization channel corresponding to the synchronization signal according to the network connection status of the synchronization signal and/or the information of the reference synchronization source;

And if the sending device determines to send the synchronization information on the synchronization channel, determining, according to its own network connection status and/or information of the reference synchronization source, synchronization information that needs to be sent in the synchronization channel, and in the agreed physical The determined synchronization information is transmitted over the synchronization channel on the resource.
The method according to claim 1, wherein the transmitting device determines whether to send synchronization information on a synchronization channel corresponding to the synchronization signal according to its network connection status and/or information of a reference synchronization source, specifically including :

And if the sending device is currently located in a network connection, and the reference synchronization source of the sending device is a network side device, the sending device determines to send synchronization information on a synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is a network side device, the sending device determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is itself, the sending device determines to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is a user equipment other than itself or a global positioning system (GPS), the transmitting device determines the synchronization channel corresponding to the synchronization signal. Send synchronization information; or,

And if the sending device is currently located outside the network connection, and the current forwarding number of the synchronization signal of the reference synchronization source of the sending device does not exceed a set threshold, the sending device determines to send on the synchronization channel corresponding to the synchronization signal. Synchronize information; or,

If the sending device is currently located outside the network connection and the reference synchronization source of the sending device is not itself, the sending device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

And if the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold, the sending device determines that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.
The method of claim 1, wherein the transmitting device determines, according to its own network connection status and/or information of a reference synchronization source, synchronization information that needs to be sent in the synchronization channel, including:

Determining, by the sending device, synchronization information that needs to be sent in the synchronization channel according to a correspondence between a network connection state and synchronization information carried by the synchronization channel; or

Determining, by the sending device, the synchronization information that needs to be sent in the synchronization channel according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; or

The transmitting device determines synchronization information that needs to be sent in the synchronization channel according to the correspondence between the network connection state and the information of the reference synchronization source and the synchronization information carried by the synchronization channel.
The method according to any one of claims 1 to 3, wherein the transmitting device determines synchronization information to be transmitted in the synchronization channel according to its own network connection status and/or information of a reference synchronization source. include:

The sending device indicates the meaning of the synchronization information of the last N-k bits carried in the synchronization channel by using the synchronization information of the first k bits carried in the synchronization channel; or

The sending device indicates the meaning of the synchronization information of the first N-k bits carried in the synchronization channel by using the synchronization information of the last k bits carried in the synchronization channel; or

The sending device indicates the meaning of the synchronization information of the remaining N-k bits carried in the synchronization channel by using the synchronization information of the middle k bits carried in the synchronization channel;

The length of information carried by the synchronization channel is N bits, and N is a positive integer.
The method according to claim 4, wherein the k-bit synchronization information includes information indicating a network connection status of the transmitting device and/or a reference of the transmitting device Step source information.
The method according to claim 4, wherein if the number of bits of the synchronization information determined by the transmitting device is less than N, the method further comprises:

The sending device adds zeros to the synchronization information carried in the synchronization channel, so that the number of bits of the synchronization information carried in the synchronization channel is N.
The method of claim 1 wherein said synchronization information comprises at least one of the following:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.
A method for detecting synchronization information, characterized in that the method comprises:

The receiving device detects the synchronization signal;

After detecting the synchronization signal, the receiving device detects synchronization information on the synchronization channel corresponding to the synchronization signal;

Determining, by the receiving device, information about a network connection state of the transmitting device that sends the synchronization signal and/or a reference synchronization source according to whether the synchronization information is detected;

And if the receiving device detects the synchronization information, the receiving device determines, according to the synchronization information, a synchronization reference used by the receiving device to transmit or receive the device to device D2D signal.
The method of claim 8 wherein said receiving device detects whether To the synchronization information, determining the network connection status of the sending device and/or the information of the reference synchronization source, including:

If the receiving device detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the receiving device detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the receiving device detects the synchronization information, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is the sending device itself; or

If the receiving device detects the synchronization information, determining that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a user equipment or a GPS other than the sending device itself; or

If the receiving device detects the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the transmitting device that is currently located outside the network connection does not exceed a set threshold; or

If the receiving device does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

And if the receiving device does not detect the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.
The method according to claim 8 or 9, wherein after the receiving device detects the synchronization information, the method further includes: acquiring synchronization information on the synchronization channel;

The receiving device acquires synchronization information on the synchronization channel, including:

The receiving device determines synchronization information on the synchronization channel according to a correspondence between a network connection state and synchronization information carried by the synchronization channel; or

Determining, by the receiving device, synchronization information on the synchronization channel according to a correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; or

The receiving device determines the synchronization information on the synchronization channel according to the correspondence between the network connection status and the information of the reference synchronization source and the synchronization information carried by the synchronization channel.
The method of claim 10, wherein the receiving device acquires synchronization information on the synchronization channel, including:

The receiving device learns the meaning of the synchronization information of the last N-k bits of the synchronization channel by detecting the synchronization information of the first k bits in the synchronization channel; or

The receiving device learns the meaning of the synchronization information of the first N-k bits in the synchronization channel by detecting the synchronization information of the last k bits in the synchronization channel; or

The receiving device learns the meaning of the synchronization information of the remaining N-k bits in the synchronization channel by using the detected synchronization information of the middle k bits in the synchronization channel;

The length of information carried by the synchronization channel is N bits, and N is a positive integer.
The method according to claim 11, wherein the k-bit synchronization information includes information indicating a network connection state of the transmitting device and/or information of a reference synchronization source of the transmitting device.
The method of claim 8 wherein said synchronization information comprises at least one of the following:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.
A device for transmitting synchronization information, characterized in that the device comprises:

a sending module, configured to send a synchronization signal;

a first processing module, configured to: according to the network connection status and/or reference of the sending device itself Determining whether to send synchronization information on a synchronization channel corresponding to the synchronization signal;

a second processing module, configured to determine, according to the network connection status of the sending device and/or the information of the reference synchronization source, that the first processing module determines to send the synchronization information on the synchronization channel, The synchronization information transmitted in the synchronization channel is transmitted, and the determined synchronization information is transmitted through the synchronization channel on an agreed physical resource.
The device according to claim 14, wherein the first processing module is specifically configured to:

If the device is currently located in the network connection and the reference synchronization source of the device is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is the transmitting device itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is a user equipment or GPS other than the transmitting device itself, determining to send synchronization information on a synchronization channel corresponding to the synchronization signal; or ,

If the device is currently located outside the network connection and the current number of times of the synchronization signal of the reference synchronization source of the device does not exceed the set threshold, determining to send the synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the device is currently located outside the network connection and the reference synchronization source of the device is not the transmitting device itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

If the current number of times of the synchronization signal of the reference synchronization source of the device exceeds the set threshold, it is determined that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.
The device according to claim 14, wherein the second processing module is specifically configured to:

Determining synchronization information that needs to be sent in the synchronization channel according to a correspondence between a network connection state and synchronization information carried by the synchronization channel; or

Determining, according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel, the synchronization information that needs to be sent in the synchronization channel; or

The synchronization information that needs to be sent in the synchronization channel is determined according to the correspondence between the network connection status and the reference synchronization source and the synchronization information carried by the synchronization channel.
The device according to any one of claims 14 to 16, wherein the second processing module is specifically configured to:

And indicating, by using synchronization information of the first k bits carried in the synchronization channel, a meaning of synchronization information of the last N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the last k bits carried in the synchronization channel, a meaning of synchronization information of the first N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the middle k bits carried in the synchronization channel, a meaning of synchronization information of remaining N-k bits carried in the synchronization channel;

The number of information bits carried by the synchronization channel is N, and N is a positive integer.
The apparatus according to claim 17, wherein said k-bit synchronization information includes information indicating a network connection state of said transmitting device and/or information of a reference synchronization source of said transmitting device.
The device of claim 17, wherein the second processing module is further configured to:

If the number of bits of the synchronization information determined by the sending device is less than N, the synchronization information carried in the synchronization channel is padded with zeros, so that the number of bits of the synchronization information carried in the synchronization channel is N.
The apparatus of claim 14, wherein the synchronization information comprises at least one of the following information:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.
A device for detecting synchronization information, characterized in that the device comprises:

a first detecting module, configured to detect a synchronization signal;

a second detecting module, configured to: after the first detecting module detects the synchronization signal, detect synchronization information on the synchronization channel corresponding to the synchronization signal;

a processing module, configured to determine, according to whether the second detection module detects the synchronization information, a network connection status of a sending device that sends a synchronization signal and/or information of a reference synchronization source; and if the second detection module detects The synchronization information determines, according to the synchronization information, a synchronization reference used by the detection device itself to transmit or receive a device-to-device D2D signal.
The device of claim 21, wherein the processing module is specifically configured to:

If the second detection module detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the second detection module detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the second detection module detects the synchronization information, it is determined that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the sending device itself; or

If the second detection module detects the synchronization information, it is determined that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or,

If the second detection module detects the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device that is currently located outside the network connection does not exceed the set threshold; or

If the second detection module does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the second detection module does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.
The device according to claim 21 or 22, wherein the processing module is further configured to: after the second detecting module detects the synchronization information, acquire synchronization information on the synchronization channel;

The processing module acquires synchronization information on the synchronization channel, including:

Determining, according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel, the synchronization information carried in the synchronization channel; or

Determining the synchronization information carried in the synchronization channel according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; or

The synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the information of the reference synchronization source and the synchronization information carried by the synchronization channel.
The apparatus according to claim 23, wherein the processing module acquires synchronization information on the synchronization channel, including:

Obtaining, by using the synchronization information of the first k bits in the synchronization channel detected by the second detection module, the meaning of the synchronization information of the last N-k bits of the synchronization channel; or

Obtaining, by using the synchronization information of the last k bits in the synchronization channel detected by the second detection module, the meaning of the synchronization information of the first N-k bits in the synchronization channel; or

Obtaining, by using the synchronization information of the middle k bits in the synchronization channel detected by the second detection module, the meaning of the synchronization information of the remaining N-k bits in the synchronization channel;

The length of information carried by the synchronization channel is N bits, and N is a positive integer.
The apparatus according to claim 24, wherein said k-bit synchronization information includes information indicating a network connection state of said transmitting device and/or information of a reference synchronization source of said transmitting device.
The apparatus according to claim 21, wherein said synchronization information comprises the following letter At least one of the interest:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.
A user equipment, comprising: at least: a transceiver, a processor, and a memory;

The transceiver is configured to send a synchronization signal;

The processor is configured to read a program in the memory, and perform the following process: determining whether a synchronization channel corresponding to the synchronization signal is determined according to a network connection state of the user equipment itself and/or information of a reference synchronization source And transmitting the synchronization information; and if it is determined to send the synchronization information on the synchronization channel, determining, according to the network connection status of the user equipment and/or the information of the reference synchronization source, the synchronization information that needs to be sent in the synchronization channel And transmitting the determined synchronization information over the synchronization channel on the agreed physical resource.
The user equipment according to claim 27, wherein the processor is specifically configured to:

If the user equipment is currently located in the network connection and the reference synchronization source of the user equipment is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is a network side device, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is the user equipment itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal; or,

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is another user equipment or GPS other than the user equipment itself, determining to send synchronization information on the synchronization channel corresponding to the synchronization signal ;or,

Determining to send synchronization information on a synchronization channel corresponding to the synchronization signal if the user equipment is currently located outside the network connection and the current number of times of the synchronization signal of the reference synchronization source of the user equipment does not exceed a set threshold; or ,

If the user equipment is currently located outside the network connection and the reference synchronization source of the user equipment is not the user equipment itself, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal; or

And if the current forwarding number of the synchronization signal of the reference synchronization source of the user equipment exceeds a set threshold, determining that the synchronization information is not sent on the synchronization channel corresponding to the synchronization signal.
The user equipment according to claim 27, wherein the processor is specifically configured to:

Determining synchronization information that needs to be sent in the synchronization channel according to a correspondence between a network connection state and synchronization information carried by the synchronization channel;

Determining synchronization information that needs to be sent in the synchronization channel according to a correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel;

The synchronization information that needs to be sent in the synchronization channel is determined according to the correspondence between the network connection status and the reference synchronization source and the synchronization information carried by the synchronization channel.
The user equipment according to any one of claims 27 to 29, wherein the processor is specifically configured to:

And indicating, by using synchronization information of the first k bits carried in the synchronization channel, a meaning of synchronization information of the last N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the last k bits carried in the synchronization channel, a meaning of synchronization information of the first N-k bits carried in the synchronization channel; or

And indicating, by using synchronization information of the middle k bits carried in the synchronization channel, a meaning of synchronization information of remaining N-k bits carried in the synchronization channel;

The number of information bits carried by the synchronization channel is N, and N is a positive integer.
The user equipment according to claim 30, wherein the k-bit synchronization information comprises information indicating a network connection status of the user equipment and/or information of a reference synchronization source of the user equipment.
The user equipment of claim 30, wherein the processor is further configured to:

If the number of bits of the synchronization information determined by the user equipment is less than N, the synchronization information carried in the synchronization channel is padded with zeros, so that the number of bits of the synchronization information carried in the synchronization channel is N.
The user equipment according to claim 27, wherein said synchronization information comprises at least one of the following information:

a cell ID of the serving cell where the user equipment is located;

D2D resource configuration information of the serving cell where the user equipment is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the user equipment is located in a network connection;

Instructing information indicating a reference synchronization source type of the user equipment;

The current number of times the synchronization signal is sent by the user equipment;

D2D resource configuration information of the cluster where the user equipment is located;

Synchronization maintenance time information for indicating a reference synchronization source of the user equipment;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the user equipment is located;

The information carried by the synchronization channel sent by the reference synchronization source detected by the user equipment.
A user equipment, comprising: at least: a transceiver, a processor, and a memory;

The transceiver is configured to detect a synchronization signal; and after detecting the synchronization signal, detecting synchronization information on a synchronization channel corresponding to the synchronization signal;

The processor is configured to read a program in the memory, and perform the following process: determining, according to whether the transceiver detects the synchronization information, determining a network connection status and/or a reference synchronization of a sending device that sends a synchronization signal Source information; and if the transceiver detects the synchronization information, And determining, according to the synchronization information, a synchronization reference used by the user equipment to send or receive, the device to the device D2D signal.
The user equipment according to claim 34, wherein the processor is specifically configured to:

If the transceiver detects the synchronization information, it is determined that the sending device is currently located in the network connection, and the reference synchronization source of the sending device is a network side device; or

If the transceiver detects the synchronization information, it is determined that the sending device is currently located outside the network connection, and the reference synchronization source of the sending device is a network side device; or

If the transceiver detects the synchronization information, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is the sending device itself; or

If the transceiver detects the synchronization information, determining that the sending device is currently located outside the network connection and the reference synchronization source of the sending device is another user equipment or GPS other than the sending device itself; or ,

If the transceiver detects the synchronization information, determining that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device that is currently located outside the network connection does not exceed a set threshold; or

If the transceiver does not detect the synchronization information, determining that the reference synchronization source of the sending device is not the sending device and the sending device is located outside the network connection; or

If the transceiver does not detect the synchronization information, it is determined that the current forwarding number of the synchronization signal of the reference synchronization source of the sending device exceeds a set threshold.
The user equipment according to claim 34 or 35, wherein the processor is further configured to acquire synchronization information on the synchronization channel after the transceiver detects the synchronization information;

The processor acquiring synchronization information on the synchronization channel, including:

Determining, according to the correspondence between the network connection status and the synchronization information carried by the synchronization channel, the synchronization information carried in the synchronization channel; or

Determining the synchronization information carried in the synchronization channel according to the correspondence between the information of the reference synchronization source and the synchronization information carried by the synchronization channel; or

The synchronization information carried in the synchronization channel is determined according to the correspondence between the network connection status and the information of the reference synchronization source and the synchronization information carried by the synchronization channel.
The user equipment according to claim 36, wherein the processor is specifically configured to:

Obtaining the meaning of the synchronization information of the last N-k bits of the synchronization channel by using the synchronization information of the first k bits in the synchronization channel detected by the transceiver; or

Obtaining, by the transceiver, synchronization information of the last k bits in the synchronization channel, and knowing the meaning of synchronization information of the first N-k bits in the synchronization channel; or

Obtaining, by the transceiver, synchronization information of the middle k bits in the synchronization channel, and knowing the meaning of synchronization information of the remaining N-k bits in the synchronization channel;

The length of information carried by the synchronization channel is N bits, and N is a positive integer.
The user equipment according to claim 37, wherein the k-bit synchronization information includes information indicating a network connection status of the transmitting device and/or information of a reference synchronization source of the transmitting device.
The user equipment according to claim 34, wherein said synchronization information comprises at least one of the following information:

a cell ID of the serving cell where the sending device is located;

D2D resource configuration information of the serving cell where the sending device is located;

a radio frame and/or a subframe number in which the synchronization channel is located;

Instructing information indicating whether the transmitting device is located in a network connection;

Instructing information indicating a reference synchronization source type of the transmitting device;

The current number of times the synchronization signal is sent by the sending device;

D2D resource configuration information of the cluster where the sending device is located;

Synchronization maintenance time information for indicating a reference synchronization source of the transmitting device;

The D2D resource configuration information of the cluster or the cell in which the reference synchronization source of the sending device is located;

The information carried by the synchronization device that is sent by the synchronization device and transmitted by the synchronization source.