WO2015055142A1 - Discovery signal transmitting and receiving method and transmitting and receiving apparatus - Google Patents

Abstract

Disclosed in the present invention are a discovery signal transmitting and receiving method and a transmitting and receiving apparatus, and the transmitting method comprises: determining the type of a message contained in a discovery signal needed to be transmitted; determining the format and content of the discovery signal according to the determined message type and generating the message is generated, and the determined message type is indicated by information carried in the message and/or a physical resource area occupied by the message; and transmitting the generated discovery signal. With the message type being indicated in the discovery signal in the present invention, UE (User Equipment) that receives the discovery signal can determine the message type and further become aware of the currently adopted discovery mode, helping the UE complete the subsequent discovery process in a right and proper way; and in this way, the discovery mode among UE can be flexibly selected as required, and there exists a support for the use of any combination of a plurality of discovery modes.

Description

Method for transmitting and receiving a discovery signal, and transmitting and receiving device

The present application claims priority to Chinese Patent Application No. 201310492245.6, entitled "Sending and Receiving of Discovery Signals, and Transmitting and Receiving Devices", filed on October 18, 2013, the entire contents of which are hereby incorporated by reference. Combined in this application.

Technical field

The present invention relates to the field of communications, and in particular, to a method of transmitting and receiving a discovery signal, and a transmitting and receiving apparatus.

Background technique

In the traditional cellular communication technology, the data communication process between two user equipments (User Equipments, UEs) is as shown in Figure 1. In the scenario shown in Figure 1, the voice, data, and other services of the two UEs pass through the base stations and core networks where they reside. The interaction may be performed, where the respective base station may be an eNB (evolved NodeB), and the core network may include a PDN GW (Packet Data Network Gateway)/SGW (Service Gateway) .

D2D (Device-to-Device) means that neighboring UEs can transmit data over a direct link within a certain distance without forwarding through the central node. As shown in Figure 2, the D2D technology itself. The short-range communication characteristics and direct communication method have the following advantages:

(1) The terminal short-distance direct communication mode can achieve higher data rate, lower delay and lower power consumption;

(2) The efficient use of spectrum resources can be realized by utilizing the widely distributed user terminals in the network and the short-distance characteristics of the D2D communication link;

(3) The direct communication method of the D2D can adapt to the local data sharing requirements of services such as a wireless peer-to-peer (peer-to-peer), and provide a data service with flexible adaptability;

(4) D2D direct communication can utilize a large number of widely distributed communication terminals in the network to expand the coverage of the network.

LTE D2D (Long Term Evolution Device-to-Device) refers to the D2D discovery and communication process controlled by the LTE network operating on the LTE licensed band. On the one hand, the advantages of D2D technology can be fully utilized, and the control of LTE network can overcome some problems of traditional D2D technology, for example, the problem that the interference is uncontrollable. The introduction of LTE D2D features will enable LTE technology to evolve from pure wireless mobile cellular communication technology to UCT (Universal Connectivity Technology).

The LTE D2D technology includes two aspects: D2D discovery and D2D communication. The D2D discovery refers to a D2D UE to discover other D2D UEs in the vicinity. The discovery between the D2D UEs is implemented by the discovery signal, and the discovery signal can carry certain identification information, such as a device. Information, application information, service types, etc., and the discovery between D2D UEs can be at least in two ways:

Method 1: Direct discovery method. In this manner, the UE is found to send the discovery signal with the discovery message, and the other UEs discover and identify the UE by detecting the discovery message, and the discovery message carries the identification information of the discovered UE, such as the device ID (Identity, identity). Identification number), application ID, etc.

Method 2: Request response method. In this manner, the UE is found to send a discovery signal with a request message. After detecting the message, the other UE determines whether it is the requested target UE, or whether it is to be discovered by itself, and determines whether to send a corresponding response message according to the determination result. The UE is found to be discovered by detecting a response signal, wherein the identification message can be carried in both the request message and the response message.

It can be seen from the above discovery process that the UE sends a discovery message or a request message, determines the discovery mode used, and sends the identity of the UE (the UE is discovered or discovered), and also determines the subsequent discovery process.

If the D2D discovery uses only one of the above two discovery methods, there are limitations in some application scenarios. For example, the mode 1 is not suitable for the discovery of a target UE, and the mode 2 is not suitable for the advertisement application.

Therefore, in actual applications, there are various ways for D2D UEs to discover each other. For example, UEs can discover by directly sending discovery messages, or can perform discovery by request-response. Different discovery methods are used. The corresponding discovery process is different, but the discovery used The format and content of the message (indicating that the local UE needs to be discovered) and the request message (indicating that the local UE requests to discover other UEs) are generally similar.

If the above two or more discovery modes are allowed, different D2D UEs may adopt different discovery modes. In this case, when the D2D UE detects the discovery signal, it cannot know whether the other party is the UE or the UE. It is also impossible to judge whether the detected signal is a request message or a discovery message, and therefore it is impossible to determine the current discovery mode and whether a response is required, and the subsequent discovery process cannot be correctly performed according to the received signal.

However, for the UE that receives the discovery signal in the related art, the discovery method corresponding to the currently received signal cannot be known, and thus the discovery process cannot be correctly performed. Currently, an effective solution has not been proposed.

Summary of the invention

The present invention provides a method for transmitting and receiving a discovery signal, and a transmitting and receiving device. The UE that receives the discovery signal in the related art cannot learn the discovery mode corresponding to the currently received signal, and thus cannot correctly perform the discovery process. The problem is that the user equipment receiving the discovery signal can determine the message type of the received discovery signal, so that the subsequent discovery process can be correctly performed.

The technical solution of the present invention is implemented as follows:

An embodiment of the present invention provides a method for sending a discovery signal, including:

Determining a message type of a message included in the discovery signal to be transmitted; determining a format and content of the discovery signal according to the determined message type and generating the message, wherein the information carried by the message and/or the message is occupied The physical resource area represents the determined message type; the generated discovery signal is transmitted.

The message types of the messages included in the discovery signal that need to be sent include:

Determining the currently used discovery mode, and determining the message type according to the discovery mode.

And determining the message type according to the discovery manner includes:

If the discovery mode is direct discovery mode, the message type is determined as a discovery message;

If the discovery mode is the request response mode, the message type is determined to be a request message or a response message.

In addition, the indicating the type of the message by using the information carried by the message includes: assigning a message type indication bit in the message to a determined value according to a correspondence between a preset indication index value and a message type. And indicating an index value corresponding to the message type; and/or determining a message format of the message as a message format used by the message type according to a correspondence between a preset message format and a message type.

Optionally, the conditions for distinguishing different message formats include at least one of the following: different information lengths, different message content, different scrambling modes, different check codes, different modulation and coding modes, and different uses. Physical channel bearer.

The determining, by the physical resource area occupied by the message, the determined message type includes:

The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.

In addition, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

An embodiment of the present invention further provides a method for receiving a discovery signal, including:

Detecting and receiving a discovery signal; determining a message type of the message according to information carried by the message included in the discovery signal and/or a physical resource area occupied by the message; performing user equipment according to the determined message type UE discovery.

Determining, according to the information carried in the message included in the discovery signal, the message type of the message includes:

Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.

And, optionally, the conditions for distinguishing different message formats include at least one of the following: different information lengths, different message contents, different scrambling modes, different check codes, different modulations. The coding mode is carried by different physical channels.

In addition, determining, according to the physical resource area occupied by the message included in the discovery signal, the message type of the message includes:

The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.

In addition, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

In addition, according to the determined message type, performing the discovery of the user equipment UE includes:

The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.

In addition, according to the determined message type, performing the discovery of the user equipment UE includes:

In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.

An embodiment of the present invention further provides a sending device for discovering a signal, including:

a determining module, configured to determine a message type of a message included in the discovery signal that needs to be sent;

And a generating module, configured to determine a format and content of the discovery signal according to the determined message type, and generate the message, where the determined information is represented by the information carried by the message and/or the physical resource area occupied by the message Message type

A sending module, configured to send the generated discovery signal.

According to an embodiment of the present invention, there is further provided a receiving device for discovering a signal, including

a detecting module, configured to detect and receive a discovery signal;

a determining module, configured to determine a message type of the message according to information carried by the message included in the discovery signal and/or a physical resource area occupied by the message;

And a processing module, configured to perform discovery of the user equipment UE according to the determined message type.

By expressing the message type in the discovery signal, the present invention can enable the UE receiving the discovery signal to determine the message type and then know the currently used discovery mode, which helps the UE in the correct manner. The subsequent discovery process is performed, so that the discovery mode between UEs can be flexibly selected according to needs, and a combination of multiple discovery modes can be supported.

DRAWINGS

1 is a schematic diagram of a data communication process between two terminals in an existing cellular communication technology;

2 is a schematic diagram of data transmission between two terminals in D2D;

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

4 is a flowchart of a method for receiving a discovery signal according to an embodiment of the present invention;

FIG. 5 is a flowchart of a process of sending a discovery signal UE1 according to an embodiment of the present invention;

FIG. 5b is a flowchart of a process of receiving a discovery signal UE2 according to an embodiment of the present invention;

FIG. 5c is a flowchart of determining, according to message content, whether to be discovered by the UE according to an embodiment of the present invention;

FIG. 6 is a block diagram of a device for transmitting a discovery signal according to an embodiment of the present invention;

FIG. 7 is a block diagram of a device for transmitting a discovery signal according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1 of the present invention provides a method for transmitting a discovery signal.

As shown in FIG. 3, the sending method includes:

Step S101, determining a message type of a message included in the discovery signal that needs to be sent;

Step S102, determining a format and content of the discovery signal according to the determined message type and generating a location The message, wherein the information carried by the message and/or the physical resource area occupied by the message represents the determined message type;

In step S103, the generated discovery signal is transmitted.

When determining the message type of the message included in the discovery signal that needs to be sent, the currently used discovery mode may be first determined, and then the message type of the message in the discovery signal is determined according to the discovery mode.

And determining the message type according to the discovery manner includes: if the discovery mode is the direct discovery mode, determining the message type as the discovery message; if the discovery mode is the request response mode, determining the message type as the request message or the response message.

In an embodiment of the present invention, different message types may be distinguished by the length of the information carried in the message and/or the content of the message.

According to the embodiment of the present invention, when the information carried by the message indicates the determined message type, the message type indication bit in the message may be assigned to the determined value according to the correspondence between the preset indication index value and the message type. Indicates the index value corresponding to the message type.

According to the embodiment of the present invention, when the information carried by the message indicates the determined message type, the format of the message may be determined as the message format adopted by the message type according to the correspondence between the preset message format and the message type. .

Further, when distinguishing different message types, the difference condition of the message format may include at least one of the following:

Different information lengths, different message contents, different scrambling methods, different check codes, different modulation and coding modes, and different physical channel bearers. It should be noted that the above is merely an enumeration of the conditions constituting the difference of the message format. In addition, different message formats may be distinguished by other factors or conditions, thereby indicating different message types, and the above conditions may be used alone. Can also be used in combination.

According to the embodiment of the present invention, when the determined message type is represented by the physical resource area occupied by the message, the message may be configured to occupy the determined message type according to the correspondence between the preset physical resource area and the message type. Physical resources in the physical resource area. among them, A physical resource area may refer to a set of subframes, or may refer to other forms of physical resource sets.

Further, the determined message type may include at least one of the following: a discovery message, a request message, a response message, and a synchronization message. In addition, in the case that the determined message type is a discovery message, before sending the configured discovery signal, the method further includes:

The identification signal of the discovered user equipment UE is carried in the discovery signal.

And, in the case that the determined message type is the request message, before sending the configured discovery signal, the method further includes:

The discovery signal carries the identification information of the target user equipment UE, or further carries the identification information of the discovery UE.

The identification information includes at least one of the following:

UE identity, UE type, application identifier, IP (internet protocol) address, location information. The UE type may include at least one of the following information: whether the UE is a cluster head, whether the UE is within the network coverage, whether the UE is synchronized with the base station, and whether the UE is synchronized with a GPS (Global Positioning System) signal. .

In addition, the synchronization message may further carry part of the content of the foregoing identification information, and may further carry information such as a system discovery resource and a discovery signal transmission resource, so that the UE performs discovery according to the content in the synchronization message.

Embodiment 2 of the present invention further provides a method for receiving a discovery signal.

As shown in FIG. 4, the receiving method includes:

Step S201, detecting and receiving a discovery signal;

Step S202, determining a message type of the message according to the information carried in the message included in the discovery signal and/or the physical resource area occupied by the message;

Step S203: Perform discovery of the user equipment UE according to the determined message type.

According to the embodiment of the present invention, when determining the message type of the message according to the information carried in the message included in the discovery signal, the correspondence between the index value and the message type and the message type in the message may be determined according to a preset indication value. Indicates the assignment of a bit and determines the message type of the message.

Determining, according to information carried by a message included in a discovery signal, according to an embodiment of the present invention When the message type of the message is used, the message type of the message may be determined according to the correspondence between the preset message format and the message type, and the message format of the message. The conditions for distinguishing different message formats include at least one of the following: different information lengths, different message contents, different scrambling modes, different check codes, different modulation and coding modes, and different physical channel bearers. For other conditions or factors that distinguish different message formats, this article will not list them one by one, and these conditions can be used alone or in combination.

According to the embodiment of the present invention, when the message type of the message is determined according to the physical resource area occupied by the message included in the discovery signal, the correspondence between the preset physical resource area and the message type, and the received discovery may be The physical resource in the physical resource area occupied by the message in the signal determines the message type of the message.

Further, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

In addition, according to the determined message type, performing the discovery of the user equipment UE includes:

When the determined message type is the discovery message, the information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal.

And the performing the discovery of the user equipment UE according to the determined message type may further include:

In the case that the determined message type is the request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.

The identification information includes at least one of the following:

UE identity, UE type, application identifier, IP address, location information. The UE type may include at least one of the following information: whether the UE is a cluster head, whether the UE is within the network coverage, whether the UE synchronizes with the base station, whether the UE synchronizes with the GPS signal, and the like.

In fact, the discovery signal in the embodiment of the present invention includes all signals that can be used for discovery between UEs. The message included in the discovery signal is not limited to the above-mentioned discovery message, request message, and response message, in other application scenarios. The discovery between UEs can be realized by means of sending discovery messages and other discovery methods other than the request-response discovery mode. At this time, in these scenarios. The other types of signals and messages used for the discovery of the UEs may be labeled with the above-mentioned schemes of the embodiments of the present invention, thereby facilitating the receiving UE to identify the currently used discovery mode and the type of the message.

The process of transmitting the discovery signal and receiving the discovery signal in the present invention will be described in detail below with the UE having different identities as follows:

The process of sending the discovery signal UE1 provided by the third embodiment of the present invention, as shown in FIG. 5a, includes the following steps:

Step 301: The UE1 determines the discovery mode to be used according to the requirements of the application scenario, where the discovery mode may be a direct discovery mode or a request response mode. In addition, the step may further include determining whether the UE is a discovery UE or a UE.

Step 302: The UE1 determines the format and content of the message included in the discovery signal according to the discovery manner used.

Step 303: The UE1 sends a discovery signal, and determines whether a response message needs to be detected according to the discovery manner. For example, if it is a request response mode, the response message needs to be detected, and the target UE is found by using the response message.

In step 302, the determining method of determining the discovery signal may include at least one of the following manners:

Manner 1: The UE1 determines, according to the discovery mode used, the type of the message (the discovery message or the request message) included in the discovery signal, and the format and content of the corresponding message;

In the second mode, the UE1 determines the physical resources used for the discovery signal transmission according to the discovery mode used. Specifically, the different discovery modes may use different resources in the physical resource set. For example, the base station allocates different physical resources for the direct discovery mode and the request response mode respectively, and they may occupy different subframes or different in the same subframe. bandwidth.

In the first method, the UE1 determines the format and content of the message, including one or more of the following principles:

Principle 1: If it is a request message, it needs to include identification information of the target UE to be discovered. For example, the identification information of the target discovery UE may include several types of information: The standby ID, the application ID of the target UE, the IP address of the target UE, the GPS location range of the target UE, and the like;

Principle 2: The discovery message and the request message may use the same or different message formats. Specifically, the discovery message and the request message may use different information lengths and information fields, similar to different DCI formats (Downlink Control Information format, downlink) in LTE. Control information format), for example, the discovery message only contains the device ID information of the discovered UE, and the request message includes the device ID and application ID information of the discovered UE;

Principle 3: In the message, the message type indication information of several bits is used to distinguish whether it is a discovery message or a request message. For example, in one example, the information type can be distinguished by using 1-bit indication information, where 0 represents a discovery message and 1 represents a request. Messages, if there are more types of messages to be distinguished, a larger number of bits can be used to represent multiple message types;

The processing procedure of the UE2 that receives the discovery signal according to the fourth embodiment of the present invention, as shown in FIG. 5b, includes the following steps:

Step 401: The UE2 receives the message included in the discovery signal sent by the UE1.

Step 402: The UE2 determines the type of the message by using the information carried by the message or the physical resource used by the message. The method includes the following methods:

Step 403: The UE2 performs a subsequent discovery process according to the message type and the message content.

In step 402, the UE2 determines the type of the message by using the information carried by the message or the physical resource used by the message, and specifically includes the following methods:

Method 1. If the message includes the identification information of the target discovery UE, the message is a request message, otherwise it is a discovery message. For example, the target discovery UE identification information may include several types of information: the target UE's device ID and target. The application ID of the UE, the IP address of the target UE, the GPS location range of the target UE, and the like;

Method 2: Determine the type of the message according to the format of the detected message and the correspondence between the pre-agreed message format and the message type. Specifically, different message formats may use different information lengths and information fields, similar to LTE. The different DCI formats, for example, the discovery message only contains the device ID information of the discovered UE, and the request message includes the device ID and the application ID information of the discovered UE, thereby distinguishing different message types.

Method 3: Determine the type of the message according to the message type indication information in the message, for example, use 1 bit of indication information to distinguish the message type, 0 represents the discovery message, and 1 represents the request message;

Method 4: Determine the type of the message according to the physical resource used for transmitting the message; specifically, different message types are transmitted by using resources in different physical resource sets, and resources used by different types may be pre-configured by the network side, or Pre-agreed between UEs, for example, they can occupy different subframes or different bandwidths in the same subframe.

In step 403, the UE2 performs a subsequent discovery process according to the message type and the message content as follows:

Manner 1: If the message type is a discovery message, the information of the discovered UE is obtained according to the content of the message, thereby discovering the UE;

Manner 2: If the message type is a request message, learn the information of the discovered UE and/or the information of the target UE of the UE according to the content of the message to determine whether to be discovered by the UE; if it is to be discovered by the UE, then to the UE Send the corresponding response message.

In the second mode in step 403, determining whether to be discovered by the UE according to the content of the message mainly includes the following steps, as shown in FIG. 5c:

Step 4032, determining, according to the identification information of the target UE included in the message, whether the target UE is the self, and if yes, determining whether to be discovered by the UE according to the application requirement;

Step 4032b, according to whether the user meets the qualification condition of the target UE included in the message, if it is met, it is determined according to the application requirement whether to be discovered by the UE; for example, the qualification condition may be geographic location information, a GPS coordinate range, or the like;

Step 4032c: Determine, according to the identification information of the discovered UE and the application requirement included in the message, whether it is to be discovered by the UE.

In the fifth embodiment of the present invention, it is assumed that the UE1 is an advertising terminal, that is, the advertisement information is sent to other surrounding UEs, and the UE2 is the discovery UE, that is, the UE2 discovers the UE1 by using the discovery signal. The discovery process includes the following steps:

Step 501: The UE1 determines, according to its own advertising service, that the discovery mode used is a direct discovery mode, and is itself a discovered UE;

Step 502: The UE1 determines that the message included in the discovery signal is a discovery message, and uses the agreed message format to send the message according to the adopted direct discovery mode. Specifically, the 1-bit indication information included in the message indicates that the type of the message is The discovery message (such as Table 1, indicating that the field indicates a value of 0), and the message further includes the identification information of the UE1, that is, the device ID and the advertisement name of the UE1;

Table 1

Step 503: The UE1 selects a discovery resource, and sends a discovery signal on the resource, where the discovery signal includes the discovery message in step 502.

Step 504: The UE2 blindly detects the message included in the discovery signal sent by the UE1 by using the agreed message format by listening to all the discovered resources. The agreed message length and the message content, that is, the message includes a 1-bit type indication field and Identification information of UE1.

Step 505: The UE2 determines the type of the message according to the 1-bit type indication information in the message. Specifically, the indication field indicates a value of 0. Therefore, according to the type of the message in the above table, the type of the message is a discovery message, not a synchronization message and a request. Messages and other types of messages;

Step 506, the UE2 learns the identification information of the UE1, that is, the device ID and the advertisement name of the UE1 according to the content of the message, thereby discovering the UE;

Step 507: The UE2 obtains further detailed advertisement information by using the base station according to the device ID and the advertisement name of the UE1.

In the sixth embodiment of the present invention, it is assumed that UE1 is a public safety terminal and needs to be found by other UEs for assistance, and UE2 is a discovery UE, that is, UE2 wants to discover UE1 by using a discovery signal. In addition, all discovery resource areas are divided into two parts, one for area discovery and one for request response discovery. The base station of the resource area informs all relevant D2D UEs in advance through high layer signaling, wherein the first half of the time domain resources (subframes 0-10) of the entire discovery resource area are used. It is directly discovered that the latter half of the time domain resources (subframes 11-20) are used to request response discovery. At this point, the discovery process includes the following steps:

Step 601: The UE1 determines, according to its own public security service, that the discovery mode used is a direct discovery mode, and is itself a discovered UE;

Step 602: The UE1 determines, according to the direct discovery mode that is used, that the message included in the discovery signal is a discovery message, and sends the message in an agreed message format. Specifically, the message format used is: the length of the message is 128 bits, and the message only includes the identification information of the UE1, that is, the device ID and the location information of the UE1.

Step 603: The UE1 randomly selects a discovery resource in the direct discovery resource area (ie, the subframes 0-10) configured by the base station, and sends a discovery signal on the resource, where the discovery signal includes the discovery message in step 602.

Step 604: UE2 separately monitors in the direct discovery resource area and the request response resource area (ie, subframes 0-20), performs blind detection on the resources by using the agreed message format, and detects that the UE1 sends in the subframe 3. Discover the messages contained in the signal;

Step 605: The UE2 determines the type of the message according to the resource area that receives the message. According to the high-level signaling configuration of the base station received by the UE2, the subframe 3 belongs to the direct discovery resource area, and therefore the type of the message is a direct discovery message.

Step 606: The UE2 learns the identification information of the UE1, that is, the device ID and location information of the UE1, according to the content of the message, thereby discovering the UE;

Step 607: The UE2 finds the UE1 according to the device ID and location information of the UE1, and provides the required assistance for the UE1.

In the seventh embodiment of the present invention, it is assumed that the UE1 is a normal D2D terminal, and the UE2 needs to be discovered because the social application needs, that is, the UE2 is the discovered UE. The process of discovering the UE includes the following steps:

The discovery message, the request message, and the response message respectively correspond to different message formats, that is, their information fields contain different information, namely, message format 1 (discovery message), message format 2 (request message), and message format 3 (response message). .

Message format 1: length is 64 bits, including device ID information of the discovered UE;

Message format 2: the length is 192 bits, including the device ID information of the discovery UE, the IP address, and the device ID information of the target UE;

Message format 3: length is 128 bits, including the device ID information and IP address of the discovered UE;

Step 701: The UE1 determines, according to the requirement of the social application, that the used discovery mode is a request response mode, and is itself a discovery UE.

Step 702: The UE1 determines, according to the used request response manner, that the message included in the discovery signal is a request message, and sends the message by using a message format corresponding to the agreed request message (the above message format 2). Specifically, the request message is 192 bits, and includes device ID information, an IP address, and device ID information of the target UE of the UE.

Step 703: The UE1 selects a resource in the discovery resource area, and sends a discovery signal on the resource, where the discovery signal includes the foregoing message;

Step 704: The UE2 listens on the pre-configured discovery resource, and detects the message included in the discovery signal by using different agreed message formats (message formats 1, 2, and 3) on each resource, and is in a certain resource. The message sent by UE1 in message format 2 is successfully detected.

Step 705: The UE2 determines, by using the agreed correspondence between the foregoing message format and the message type, that the type of the message is a request message.

Step 706: The UE2 learns, according to the content of the message, the identification information of the UE1 and its target UE, that is, the device ID of the UE1 and its target UE, and the IP address of the UE1.

Step 707: The UE2 determines, according to the identification information of the target UE, whether the target UE is the self. The specific determination method is to see whether the device ID of the target UE in the message is consistent with the parameter of the own device ID.

Step 708: If the target UE is itself, determine whether to be discovered by the UE according to the identification information of the UE1 and the current specific application. Assume that in the current application, UE1 is a UE2 buddy, and UE2 allows itself to be discovered by UE1, and then sends a response message corresponding to the request message in message format 3 on the pre-configured response resource, and the response message includes the identification information of UE2 ( Device ID information and IP address);

Step 709: The UE1 uses the message format 3 blind detection response message on the pre-configured response resource, and after detecting the response message sent by the UE2, according to the identification information of the UE2 included in the response message, The device ID and IP address of the UE2 are known, and the discovery process of the UE2 is completed.

Step 710: UE1 and UE2 perform further data communication by their respective IP addresses.

It is not difficult to see from the above description that the D2D discovery method provided by the technical solution of the present invention enables the receiving UE to know the type of the message included in the discovery signal by carrying the relevant information in the discovery signal, thereby determining the discovery mode used, and according to The determined discovery mode performs subsequent operations. In this way, the D2D UE can support two or more D2D discovery modes at the same time, and the D2D UE can select different discovery modes according to the application requirements and send the same. Different types of messages are used to discover or discover the target UE, and the receiver can also learn the current discovery mode and message type through the message, so that the discovery can be performed in different application scenarios, thereby avoiding the use in some application scenarios. The user device discovery process is limited.

Based on the same inventive concept as the method, the eighth embodiment of the present invention further provides a device for transmitting a discovery signal. Specifically, as shown in FIG. 6, the transmitting device includes: a determining module 21, a generating module 22, and a sending module 23.

a determining module 21, configured to determine a message type of a message included in the discovery signal that needs to be sent;

The generating module 22 is configured to determine a format and content of the discovery signal according to the determined message type, and generate a message, where the information carried by the message and/or the physical resource area occupied by the message represents the determined message type;

The sending module 23 is configured to send the generated discovery signal.

Further, the determining module 21 is specifically configured to:

Determining the currently used discovery mode, and determining the message type according to the discovery manner.

Further, the determining module 21 is further configured to:

If the discovery mode is a direct discovery mode, determining the message type as a discovery message;

If the discovery mode is a request response mode, the message type is determined to be a request message or a response message.

Further, the generating module 22 is specifically configured to:

The message is according to a correspondence between a preset index value and a message type The message type indicating bit is assigned to the determined index value corresponding to the determined message type; and/or

The message format of the message is determined according to a correspondence between a preset message format and a message type as a message format adopted by the message type.

Further, the condition for distinguishing different message formats includes at least one of the following: different information lengths, different message contents, different scrambling methods, different check codes, different modulation and coding modes, and different physical uses. Channel bearer.

Further, the generating module 22 is specifically configured to:

The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.

Further, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

The ninth embodiment of the present invention further provides a receiving device for the discovery signal. Specifically, as shown in FIG. 7, the receiving device includes: a detecting module 31, a determining module 32, and a processing module 33.

a detecting module 31, configured to detect and receive a discovery signal;

The determining module 32 is configured to determine a message type of the message according to information carried by the message included in the discovery signal and/or a physical resource area occupied by the message;

The processing module 33 is configured to perform discovery of the user equipment UE according to the determined message type.

Further, the detecting module 31 is specifically configured to:

Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.

Further, the condition for distinguishing different message formats includes at least one of the following: different information lengths, different message contents, different scrambling methods, different check codes, different modulation and coding modes, and different physical uses. Channel bearer.

Further, the determining module 32 is specifically configured to:

The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.

Further, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

Further, the processing module 33 is specifically configured to:

The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.

Further, the processing module 33 is specifically configured to:

In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.

Based on the same inventive concept as the method, the tenth embodiment of the present invention further provides a terminal as shown in FIG.

The processor 401, the memory 402, the transceiver 403, and the bus interface 404, wherein the processor 401, the memory 402 and the transceiver 403 are connected by a bus interface 404;

The processor 401 is configured to determine a message type of a message included in a discovery signal that needs to be sent, determine a format and content of the discovery signal according to the determined message type, and generate the message, where the message is carried by the message. Information and/or a physical resource area occupied by the message represents the determined message type;

The transceiver 403 is configured to send the generated discovery signal.

The memory 402 is configured to store one or more executable programs, and is used to configure the processor 401;

The bus interface 404 is for providing an interface, and the processor is responsible for managing the bus architecture and usual processing.

Further, the processor 402 is specifically configured to:

Determining the currently used discovery mode, and determining the message type according to the discovery manner.

Further, the processor 401 is further configured to:

If the discovery mode is a direct discovery mode, determining the message type as a discovery message;

If the discovery mode is a request response mode, the message type is determined to be a request message or a response message.

Further, the processor 402 is specifically configured to:

And assigning, according to a preset correspondence between the index value and the message type, the message type indication bit in the message to the determined indication index value corresponding to the determined message type; and/or

The message format of the message is determined according to a correspondence between a preset message format and a message type as a message format adopted by the message type.

Further, the condition for distinguishing different message formats includes at least one of the following: different information lengths, different message contents, different scrambling methods, different check codes, different modulation and coding modes, and different physical uses. Channel bearer.

Further, the processor 402 is specifically configured to:

The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.

Further, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

The bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of memory represented by the memory. 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.

Based on the same inventive concept as the method, the eleventh embodiment of the present invention further provides a terminal as shown in FIG.

The processor 501, the memory 502, the transceiver 503, and the bus interface 504, wherein the processor 501, the memory 502 and the transceiver 503 are connected by a bus interface 504;

The processor 501 is configured to perform information according to a message included in the discovery signal. And determining a message type of the message according to the physical resource area occupied by the message; performing discovery of the user equipment UE according to the determined message type;

The transceiver 503 is configured to detect and receive a discovery signal;

The memory for storing one or more executable programs, used to configure the processor 501;

The bus interface 504 is for providing an interface, and the processor is responsible for managing the bus architecture and usual processing.

Further, the transceiver 503 is specifically configured to:

Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.

Further, the condition for distinguishing different message formats includes at least one of the following: different information lengths, different message contents, different scrambling methods, different check codes, different modulation and coding modes, and different physical uses. Channel bearer.

Further, the transceiver 503 is specifically configured to:

The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.

Further, the determined message type includes at least one of the following: a discovery message, a request message, a response message, and a synchronization message.

Further, the transceiver 503 is specifically configured to:

The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.

Further, the transceiver 503 is specifically configured to:

In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.

The bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of memory represented by the memory. 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. According to the terminal provided by the embodiment of the present invention, after the base station configures different special subframe structures for different radio frames or fields, the terminal may learn a special subframe structure configured for different radio frames or fields to communicate with the base station. .

For a specific implementation manner of the terminal, refer to the description of the foregoing terminal embodiment, and details are not described herein again.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention 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 invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. The computer program instructions can be provided to a general purpose computer, a special purpose computer, an embedded processor, or a processor of other programmable data processing device such that instructions executed by a processor of the computer or other programmable data processing device can be implemented in a flowchart The function specified in one or more processes and/or block diagrams in one or more blocks.

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 blocks of a flow or a flow and/or block diagram of the flowchart.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (42)

1. A method for transmitting a discovery signal, comprising:

   Determining the message type of the message contained in the discovery signal that needs to be sent;

   Determining a format and content of the discovery signal according to the determined message type and generating the message, wherein the determined message type is represented by information carried by the message and/or a physical resource area occupied by the message;

   Send the generated discovery signal.
2. The transmitting method according to claim 1, wherein the determining the message type of the message included in the discovery signal to be transmitted comprises:

   Determining the currently used discovery mode, and determining the message type according to the discovery manner.
3. The sending method according to claim 2, wherein the determining the message type according to the discovery manner comprises:

   If the discovery mode is a direct discovery mode, determining the message type as a discovery message;

   If the discovery mode is a request response mode, the message type is determined to be a request message or a response message.
4. The transmitting method according to claim 1, wherein the information carried by the message indicates that the determined message type comprises:

   And assigning, according to a preset correspondence between the index value and the message type, the message type indication bit in the message to the determined indication index value corresponding to the determined message type; and/or

   The message format of the message is determined according to a correspondence between a preset message format and a message type as a message format adopted by the message type.
5. The transmitting method according to claim 4, wherein the condition for distinguishing different message formats comprises at least one of the following: different information lengths, different message contents, different scrambling modes, different check codes. Different modulation and coding methods, using different physical channels Hosted.
6. The sending method according to claim 1, wherein the determining, by the physical resource area occupied by the message, the determined message type comprises:

   The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.
7. The transmitting method according to claim 1, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
8. A method for receiving a discovery signal, comprising:

   Detecting and receiving a discovery signal;

   Determining a message type of the message according to information carried by the message included in the discovery signal and/or a physical resource area occupied by the message;

   The discovery of the user equipment UE is performed according to the determined message type.
9. The receiving method according to claim 8, wherein the determining the message type of the message according to the information carried in the message included in the discovery signal comprises:

   Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

   The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.
10. The receiving method according to claim 9, wherein the condition for distinguishing different message formats comprises at least one of: different information lengths, different message contents, different scrambling modes, different check codes. Different modulation and coding modes and different physical channel bearers.
11. The receiving method according to claim 8, wherein the determining the message type of the message according to the physical resource area occupied by the message included in the discovery signal comprises:

    The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.
12. The receiving method according to claim 8, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
13. The receiving method according to claim 8, wherein the performing the discovery of the user equipment UE according to the determined message type comprises:

    The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.
14. The receiving method according to claim 8, wherein the performing the discovery of the user equipment UE according to the determined message type comprises:

    In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.
15. A device for transmitting a discovery signal, comprising:

    a determining module, configured to determine a message type of a message included in the discovery signal that needs to be sent;

    And a generating module, configured to determine a format and content of the discovery signal according to the determined message type, and generate the message, where the determined information is represented by the information carried by the message and/or the physical resource area occupied by the message Message type

    A sending module, configured to send the generated discovery signal.
16. The transmitting device according to claim 15, wherein the determining module is specifically configured to:

    Determining the currently used discovery mode, and determining the message type according to the discovery manner.
17. The transmitting device according to claim 15, wherein the determining module is further configured to:

    If the discovery mode is a direct discovery mode, determining the message type as a discovery message;

    If the discovery mode is a request response mode, the message type is determined to be a request message or a response message.
18. The transmitting device according to claim 15, wherein said generating module has Body for:

    And assigning, according to a preset correspondence between the index value and the message type, the message type indication bit in the message to the determined indication index value corresponding to the determined message type; and/or

    The message format of the message is determined according to a correspondence between a preset message format and a message type as a message format adopted by the message type.
19. The transmitting apparatus according to claim 18, wherein the condition for distinguishing different message formats comprises at least one of: different information lengths, different message contents, different scrambling methods, different check codes. Different modulation and coding modes and different physical channel bearers.
20. The transmitting device according to claim 15, wherein the generating module is specifically configured to:

    The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.
21. The transmitting apparatus according to claim 15, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
22. A receiving device for discovering signals, comprising:

    a detecting module, configured to detect and receive a discovery signal;

    a determining module, configured to determine a message type of the message according to information carried by the message included in the discovery signal and/or a physical resource area occupied by the message;

    And a processing module, configured to perform discovery of the user equipment UE according to the determined message type.
23. The receiving device according to claim 22, wherein the detecting module is specifically configured to:

    Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

    The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.
24. The receiving apparatus according to claim 23, wherein the condition for distinguishing different message formats comprises at least one of: different information lengths, different message contents, different scrambling modes, different check codes. Different modulation and coding modes and different physical channel bearers.
25. The receiving device according to claim 22, wherein the determining module is specifically configured to:

    The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.
26. The receiving apparatus according to claim 22, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
27. The receiving device according to claim 22, wherein the processing module is specifically configured to:

    The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.
28. The receiving device according to claim 22, wherein the processing module is specifically configured to:

    In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.
29. A terminal, comprising:

    a transceiver, a processor, a memory, a bus interface, wherein the processor, the memory and the transceiver are connected by a bus interface; the processor is configured to determine a message type of a message included in the discovery signal to be sent; The message type determines the format and content of the discovery signal and generates the message, wherein the determined message type is represented by the information carried by the message and/or the physical resource area occupied by the message;

    The transceiver is configured to send the generated discovery signal; the memory is configured to store one or more executable programs, and is used to configure the processor;

    The bus interface is for providing an interface.
30. The terminal according to claim 29, wherein the processor is specifically configured to:

    Determining the currently used discovery mode, and determining the message type according to the discovery manner.
31. The terminal according to claim 29, wherein the processor is further configured to:

    If the discovery mode is a direct discovery mode, determining the message type as a discovery message;

    If the discovery mode is a request response mode, the message type is determined to be a request message or a response message.
32. The terminal according to claim 29, wherein the processor is specifically configured to:

    And assigning, according to a preset correspondence between the index value and the message type, the message type indication bit in the message to the determined indication index value corresponding to the determined message type; and/or

    The message format of the message is determined according to a correspondence between a preset message format and a message type as a message format adopted by the message type.
33. The terminal according to claim 32, wherein the condition for distinguishing different message formats comprises at least one of: different information lengths, different message contents, different scrambling modes, different check codes, Different modulation and coding modes are carried by different physical channels.
34. The terminal according to claim 29, wherein the processor is specifically configured to:

    The message is configured to occupy a physical resource in a physical resource region corresponding to the determined message type according to a correspondence between a preset physical resource region and a message type.
35. The terminal according to claim 29, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
36. A terminal, comprising:

    a transceiver, a processor, a memory, a bus interface, wherein the processor, the memory and the transceiver are connected by a bus interface;

    The processor is configured to: according to information carried in the message included in the discovery signal, and/or And determining, by the physical resource area occupied by the message, a message type of the message; performing discovery of the user equipment UE according to the determined message type;

    The transceiver is configured to detect and receive a discovery signal;

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

    The bus interface is for providing an interface.
37. The terminal according to claim 36, wherein the transceiver is specifically configured to:

    Determining a message type of the message according to a correspondence between a preset indication index value and a message type, and an assignment of a message type indication bit in the message; and/or

    The message type of the message is determined according to a correspondence between a preset message format and a message type, and a message format of the message.
38. The terminal according to claim 36, wherein the condition for distinguishing different message formats comprises at least one of the following: different information lengths, different message contents, different scrambling modes, different check codes, Different modulation and coding modes are carried by different physical channels.
39. The terminal according to claim 38, wherein the transceiver is specifically configured to:

    The message type of the message is determined according to a correspondence between a preset physical resource area and a message type, and a physical resource in a physical resource area occupied by the message.
40. The terminal according to claim 36, wherein the determined message type comprises at least one of the following: a discovery message, a request message, a response message, and a synchronization message.
41. The terminal according to claim 36, wherein the transceiver is specifically configured to:

    The information of the discovered user equipment UE is obtained according to the identification information of the discovered user equipment UE carried in the discovery signal, in the case that the determined message type is a discovery message.
42. The terminal according to claim 36, wherein the transceiver is specifically configured to:

    In the case that the determined message type is a request message, it is determined whether to return a response message according to the identification information of the transmitting user equipment UE and/or the identification information of the target user equipment UE carried in the discovery signal.

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