CN104105160B

CN104105160B - Method for discovering equipment, base station and user equipment

Info

Publication number: CN104105160B
Application number: CN201310125127.1A
Authority: CN
Inventors: 张兴炜; 冯淑兰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Shenzhen Shangge Intellectual Property Service Co ltd; Tongding Interconnection Information Co Ltd
Priority date: 2013-04-11
Filing date: 2013-04-11
Publication date: 2017-12-01
Anticipated expiration: 2033-04-11
Also published as: CN104105160A; WO2014166425A1

Abstract

The present invention relates to a kind of user equipment to find method, base station and user equipment.The method for discovering equipment includes：Base station obtains the facility information of the first user equipment, and the facility information includes identifier when first user equipment uses point-to-point communication；The facility information is added to user device list by base station；Second user equipment of the base station into the base station range sends the user device list, to cause the second user equipment to find first user equipment according to the user device list.

Description

Device discovery method, base station and user equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a device discovery method, a base station, and a user equipment.

Background

With the rapid development of wireless communication technology, the super-high rate service is more and more, and therefore, the load of a wireless communication network is more and more heavy. Currently, network load is effectively reduced through Device to Device (D2D) communication. In the D2D communication mode, User Equipment (UE) and UE can communicate directly without being forwarded by a base station, so that data load of the base station is shared, spectrum resources can be better utilized, and spectrum resource utilization rate and data rate are improved.

Before a user device communicates with other user devices in D2D, it first needs to discover the user devices that can communicate in D2D. Therefore, how the user equipment discovers the UE capable of D2D communication is the most problem to be solved at present.

Disclosure of Invention

In view of the above, the present invention provides a device discovery method, a base station and a user equipment, so as to solve the problem of mutual discovery between user equipments having a D2D function.

In a first aspect, the present invention provides a user equipment discovery method, including:

a base station acquires equipment information of first user equipment, wherein the equipment information comprises an identifier of the first user equipment in point-to-point communication;

adding the equipment information to a user equipment list by the base station;

and the base station sends the user equipment list to second user equipment within the coverage range of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list.

In a first possible implementation manner of the first aspect, the ue list is one ue list or multiple ue lists.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the adding the device information to the user equipment list specifically includes: adding device information of a first user equipment to a user equipment list when it is determined that the traffic volume of the first user equipment exceeds a threshold; and/or adding the device information of the first user equipment to a user equipment list when the communication mode of the first user equipment is determined to be changed; and/or adding the equipment information of the first user equipment to the user equipment list when receiving a confirmation message of adding the user equipment list or a request of adding the user equipment list, which is sent by the first user equipment.

With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner, the sending the user equipment list to the second user equipment within the coverage of the base station specifically is: sending the user equipment list to second user equipment which is within the coverage range of the base station and is included in the user equipment list; or, the user equipment list is sent to any second user equipment within the coverage range of the base station.

With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a fourth possible implementation manner, before the sending the user equipment list to the second user equipment within the coverage of the base station, the method further includes: receiving a request for acquiring a user equipment list sent by second user equipment; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: and sending the request for obtaining the user equipment list to the second user equipment or a group of second user equipment including the second user equipment which sends the request for obtaining the user equipment list.

With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a fifth possible implementation manner, the sending the user equipment list to the second user equipment within the coverage of the base station specifically is: transmitting the user equipment list to the second user equipment through a broadcast channel or a multicast channel; or sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information carries the user equipment list; or, the user equipment list is sent through a physical downlink shared channel; and sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information is used for indicating the second user equipment to acquire the user equipment list in the physical downlink shared channel.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the sending of the downlink control information to the second user equipment through the downlink control channel specifically includes: and sending downlink control information to the second user equipment through a common or dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel.

With reference to the first possible implementation manner of the first aspect, in a seventh possible implementation manner, when the ue list is a plurality of ue lists, the first ues are classified according to access time of the first ue, a distance between the first ue and the base station, or an area where the first ue is located, and each type of the first ues form one ue list.

With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, before the sending the user equipment list to the second user equipment within the coverage of the base station, the method further includes: sending the classification identifications of the plurality of user equipment lists to second user equipment within the coverage range of the base station; receiving a user equipment list acquisition request sent by the second user equipment, wherein the user equipment list acquisition request carries a classification identifier corresponding to a user equipment list required by the second user equipment; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: and sending the user equipment list corresponding to the classification identifier carried by the user equipment list acquisition request to second user equipment in the coverage range of the base station.

With reference to the seventh possible implementation manner of the first aspect, in a ninth possible implementation manner, before the sending the user equipment list to the second user equipment within the coverage of the base station, the method further includes: sending the classification identifications of the plurality of user equipment lists to second user equipment within the coverage range of the base station; receiving a user equipment list request sent by user equipment, wherein the user equipment list request carries one bit or a plurality of bits, and the bits correspond to the classification identification; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: when the user equipment list requests to carry a bit, the base station determines whether to send a default user equipment list in the multiple user equipment lists to second user equipment in a coverage range of the base station or send a corresponding user equipment list in the multiple user equipment lists to the second user equipment in the coverage range of the base station according to the state indicated by the bit; and when the user equipment list requests to carry a plurality of bits, the base station sends the user equipment list corresponding to the classification identifications corresponding to the plurality of bits to second user equipment within the coverage range of the base station.

In a second aspect, the present invention provides a user equipment discovery method, including:

acquiring a user equipment list sent by a base station, wherein the user equipment list comprises equipment information of a plurality of user equipment, and the equipment information comprises identifiers when the user equipment adopts point-to-point communication;

and discovering the user equipment according to the user equipment list.

In a first possible implementation manner of the second aspect, the user equipment list is one user equipment list or a plurality of user equipment lists.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the obtaining a user equipment list sent by a base station specifically includes: acquiring the user equipment list sent by the base station through a broadcast channel or a multicast channel; or, acquiring downlink control information sent by a base station through a downlink control channel, wherein the downlink control information carries the user equipment list; or, acquiring downlink control information sent by the base station through a downlink control channel, wherein the downlink control information carries an indication identifier; and acquiring the user equipment list sent by the base station from a physical downlink shared channel according to the indication identifier.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the acquiring, through the downlink control channel, the downlink control information sent by the base station specifically includes: and acquiring the downlink control information sent by the base station through a public or special search space of the physical downlink control channel or the enhanced physical downlink control channel.

With reference to the first possible implementation manner of the second aspect, in a fourth possible implementation manner, when the user equipment list is a plurality of user equipment lists, before the acquiring the user equipment list sent by the base station, the method further includes: receiving classification identifications of the plurality of user equipment lists sent by the base station; and sending a request for acquiring a user equipment list to the base station, wherein the request for acquiring the user equipment list carries the classification identifier of the required user equipment list, and the base station is used for sending the user equipment list corresponding to the classification identifier to the user equipment within the coverage range of the base station.

With reference to the first possible implementation manner of the second aspect, in a fifth possible implementation manner, when the user equipment list is a plurality of user equipment lists, before the acquiring the user equipment list sent by the base station, the method further includes: receiving classification identifications of the plurality of user equipment lists sent by the base station; sending a request for obtaining a user equipment list to the base station, wherein the request for obtaining the user equipment list carries one bit or a plurality of bits, and the plurality of bits correspond to the classification identifiers; the bit is used for indicating whether the base station sends a default user equipment list in the user equipment lists to the user equipment within the coverage range of the base station or indicating the base station to send a corresponding user equipment list in the user equipment lists to the user equipment within the coverage range of the base station according to the state indicated by the bit; the bits are used for instructing the base station to send a user equipment list corresponding to the classification identifications corresponding to the bits to the user equipment within the coverage of the base station.

In a third aspect, the present invention provides a base station comprising:

an obtaining unit, configured to obtain device information of a first user equipment, where the device information includes an identifier of the first user equipment when performing peer-to-peer communication;

an adding unit for adding the device information to a user equipment list;

a first sending unit, configured to send the user equipment list to a second user equipment within a coverage area of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list.

In a first possible implementation manner of the third aspect, the user equipment list is one user equipment list or multiple user equipment lists.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the adding unit is specifically configured to: adding device information of a first user equipment to a user equipment list when it is determined that the traffic volume of the first user equipment exceeds a threshold; and/or adding the device information of the first user equipment to a user equipment list when the communication mode of the first user equipment is determined to be changed; and/or adding the equipment information of the first user equipment to the user equipment list when receiving a confirmation message of adding the user equipment list or a request of adding the user equipment list, which is sent by the first user equipment.

With reference to the third aspect or the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a third possible implementation manner, the first sending unit is specifically configured to: sending the user equipment list to second user equipment which is within the coverage range of the base station and is included in the user equipment list; or, sending the user equipment list to any second user equipment within the coverage range of the base station

With reference to the third aspect or the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a fourth possible implementation manner, the base station further includes: the receiving unit is used for receiving a request for acquiring a user equipment list sent by second user equipment; the first sending unit is specifically configured to send the second user equipment that sends the request for obtaining the user equipment list or a group of second user equipment including the second user equipment that sends the request for obtaining the user equipment list.

With reference to the third aspect or the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a fifth possible implementation manner, the first sending unit is specifically configured to: transmitting the user equipment list to the second user equipment through a broadcast channel or a multicast channel; or sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information carries the user equipment list; or, the user equipment list is sent through a physical downlink shared channel; and sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information is used for indicating the second user equipment to acquire the user equipment list in the physical downlink shared channel.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the sending of the downlink control information to the second user equipment through the downlink control channel specifically includes: and sending downlink control information to the second user equipment through a common or dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel.

With reference to the first possible implementation manner of the third aspect, in a seventh possible implementation manner, when the ue list is a multiple ue list, the first ues are classified according to access time of the first ue, a distance between the first ue and the base station, or an area where the first ue is located, and each type of the first ues form a ue list.

With reference to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner, the base station further includes: a second sending unit, configured to send the category identifiers of the multiple user equipment lists to a second user equipment within a coverage area of the base station; a receiving unit, configured to receive a request for obtaining a user equipment list sent by the second user equipment, where the request for obtaining the user equipment list carries a classification identifier corresponding to a user equipment list required by the second user equipment; the first sending unit is specifically configured to: and sending the user equipment list corresponding to the classification identifier carried by the user equipment list acquisition request to second user equipment in the coverage range of the base station.

With reference to the seventh possible implementation manner of the third aspect, in a ninth possible implementation manner, the base station further includes: a second sending unit, configured to send the category identifiers of the multiple user equipment lists to a second user equipment within a coverage area of the base station; a receiving unit, configured to receive a user equipment list request sent by user equipment, where the user equipment list request carries one bit or multiple bits, and the multiple bits correspond to the classification identifier; the first sending unit is specifically configured to: when the user equipment list requests to carry a bit, the base station determines whether to send a default user equipment list in the multiple user equipment lists to second user equipment in a coverage range of the base station or send a corresponding user equipment list in the multiple user equipment lists to the second user equipment in the coverage range of the base station according to the state indicated by the bit; and when the user equipment list requests to carry a plurality of bits, the base station sends the user equipment list corresponding to the classification identifications corresponding to the plurality of bits to second user equipment within the coverage range of the base station.

In a fourth aspect, the present invention provides a user equipment, comprising:

an obtaining unit, configured to obtain a user equipment list sent by a base station, where the user equipment list includes equipment information of multiple user equipments, and the equipment information includes identifiers when the user equipments adopt peer-to-peer communication;

and the discovery unit is used for discovering the user equipment according to the user equipment list.

In a first possible implementation manner of the fourth aspect, the user equipment list is one user equipment list or a plurality of user equipment lists.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the obtaining unit is specifically configured to: acquiring the user equipment list sent by the base station through a broadcast channel or a multicast channel; or, acquiring downlink control information sent by a base station through a downlink control channel, wherein the downlink control information carries the user equipment list; or, acquiring downlink control information sent by the base station through a downlink control channel, wherein the downlink control information carries an indication identifier; and acquiring the user equipment list sent by the base station from a physical downlink shared channel according to the indication identifier.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the acquiring, through the downlink control channel, the downlink control information sent by the base station specifically includes: and acquiring the downlink control information sent by the base station through a public or special search space of the physical downlink control channel or the enhanced physical downlink control channel.

With reference to the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the user equipment further includes: a receiving unit, configured to receive, when the ue list is a plurality of ue lists, class identifiers of the plurality of ue lists sent by a base station; a second sending unit, configured to send a user equipment list request to the base station, where the user equipment list request carries a classification identifier of a required user equipment list, and the second sending unit is used for the base station to send a user equipment list corresponding to the classification identifier to user equipment in a coverage area of the base station.

With reference to the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the user equipment further includes: a receiving unit, configured to receive, when the ue list is a plurality of ue lists, class identifiers of the plurality of ue lists sent by a base station; a second sending unit, configured to send a request for obtaining a user equipment list to the base station, where the request for obtaining the user equipment list carries one bit or multiple bits, and the multiple bits correspond to the classification identifier; the bit is used for indicating whether the base station sends a default user equipment list in the user equipment lists to the user equipment within the coverage range of the base station or indicating the base station to send a corresponding user equipment list in the user equipment lists to the user equipment within the coverage range of the base station according to the state indicated by the bit; the bits are used for instructing the base station to send a user equipment list corresponding to the classification identifications corresponding to the bits to the user equipment within the coverage of the base station.

By using the device discovery method, the base station and the user equipment provided by the invention, the base station adds the acquired device information to the user equipment list, and then sends the user equipment list to the user equipment in the coverage range of the user equipment, so that the user equipment discovers the user equipment capable of performing D2D communication with the user equipment according to the user equipment list sent by the base station.

Drawings

Fig. 1 is a flowchart of a device discovery method according to an embodiment of the present invention;

fig. 2 is a flowchart of a device discovery method according to a second embodiment of the present invention;

fig. 3 is a flowchart of a device discovery method according to a third embodiment of the present invention;

fig. 4 is a flowchart of a device discovery method according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of a base station according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base station according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural diagram of a base station according to a seventh embodiment of the present invention;

fig. 8 is a schematic structural diagram of a user equipment according to an eighth embodiment of the present invention;

fig. 9 is a schematic structural diagram of a user equipment according to a ninth embodiment of the present invention;

fig. 10 is a schematic structural diagram of a user equipment according to a tenth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is an example to describe in detail a device discovery method according to a first embodiment of the present invention, and fig. 1 is a flowchart of the device discovery method according to the first embodiment of the present invention. The main execution subject of the device discovery method is a base station. As shown in fig. 1, the device discovery method includes the steps of:

step S101, acquiring equipment information of the first user equipment.

The first user equipment may specifically be a user equipment having a D2D communication function. The device information may include: D2D communication capability of the first user device, D2D identifier (Identification, ID) of the first user device, and the like.

Optionally, the base station obtains the device information by receiving the device information sent by the first user equipment.

Specifically, the first user equipment may send the device information to the base station triggered by an event. For example, when a first user equipment in the coverage of the base station is powered on, or when the first user equipment is switched from another cell or randomly accessed to the base station, or when the point-to-point traffic volume of the first user equipment in the coverage of the base station is large, the first user equipment sends equipment information to the base station. In addition, the first user equipment may also actively send the device information to the base station. For example, after the first user equipment in the coverage of the base station is turned on, when the user does not select to use the D2D function, the first user equipment does not need to send the device information to the base station, and when the user selects to use the D2D function, the device information is sent to the base station. Or after the first user equipment within the coverage area of the base station is started or the D2D function is used, inquiring whether the user adds the first user equipment into the user equipment list of the base station, and when the user agrees to add, sending the equipment information of the first user equipment to the base station. Or the first user equipment in the coverage area of the base station sends a request for adding the user equipment list to the base station, and the first user equipment information is sent to the base station after the base station agrees.

Optionally, the base station receives a user equipment list sent by the neighboring base station, and obtains the device information from the user equipment list sent by the neighboring base station.

Because the first user equipment can be switched among a plurality of cells, in order to enable the base station to obtain the equipment information of the first user equipment switched from the adjacent cell into the coverage area of the base station, the base station can obtain the equipment information of the first user equipment currently in the coverage area of the adjacent cell base station by receiving the user equipment list of the adjacent cell base station.

Step S102, adding the acquired device information to a user device list.

Specifically, the base station may directly add the device information to the user equipment list after acquiring the device information; the obtained device information may also be cached, and when the base station determines that the traffic volume of the first user equipment corresponding to the obtained device information exceeds a threshold and/or the communication mode changes and/or receives a user equipment list joining confirmation message or a user equipment list joining request sent by the corresponding first user equipment, the device information of the first user equipment is added to the user equipment list.

Step S103, sending the user equipment list to the second user equipment within the coverage area of the base station, so that the second user equipment can find the first user equipment according to the user equipment list.

The second user equipment may specifically be a user equipment having a D2D communication function.

Specifically, the user equipment list is sent to any second user equipment within the coverage of the base station. Or, the user equipment list is sent to the second user equipment which is in the coverage area of the base station and is included in the user equipment list. Or, before sending the ue list, the base station receives a request for obtaining the ue list sent by the second ue, and then sends the ue list only to the second ue that sent the request for obtaining the ue list, or sends the ue list to a group of second ues including the second ue that sent the request for obtaining the ue list or any second ues within the coverage of the base station after receiving the request for obtaining the ue list sent by the second ue.

Optionally, when the base station sends the user equipment list to the second user equipment in the coverage area of the base station, the base station sends the user equipment list through a broadcast channel or a multicast channel; when the user equipment list is sent to one or more second user equipments in the coverage area of the user equipment, the user equipment list can be sent through a multicast channel, and the second user equipments acquire the user equipment list from a broadcast channel or the multicast channel, so that the first user equipments capable of performing D2D communication are found according to the user equipment list.

Optionally, when the base station sends the user equipment list to the second user equipment in the coverage area of the base station, the base station sends downlink control information to the second user equipment through a common search space or a dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel, where the downlink control information carries the user equipment list. All the second user equipments within the coverage of the base station may obtain the user equipment list carried by the downlink control information from the common search space of the physical downlink control channel or the enhanced physical downlink control channel or a specific second user equipment within the coverage of the base station may obtain the user equipment list carried by the downlink control information from the dedicated search space of the physical downlink control channel or the enhanced physical downlink control channel, so as to find the first user equipment capable of performing D2D communication according to the user equipment list.

Optionally, when the base station sends the user equipment list to the second user equipment in the coverage area of the base station, the user equipment list is sent through a downlink physical shared channel, and downlink control information is sent to the user equipment through a physical downlink control channel or a common search space or a dedicated search space of an enhanced physical downlink control channel, where the downlink control information carries an indication identifier, and the indication identifier is used to indicate the second user equipment to obtain the user equipment list in the physical downlink shared channel. All the second user equipments within the coverage of the base station may obtain the downlink control information from the common search space of the physical downlink control channel or the enhanced physical downlink control channel or a specific second user equipment within the coverage of the base station may obtain the downlink control information from the dedicated search space of the physical downlink control channel or the enhanced physical downlink control channel, and then obtain a user equipment list sent by the base station from the physical downlink shared channel according to the indication identifier carried by the downlink control information, so as to find the first user equipment capable of performing D2D communication according to the user equipment list.

By using the device discovery method provided by the first embodiment of the present invention, the base station adds the acquired device information including the ID of the user device D2D to the user device list, and then sends the user device list to the user devices within the coverage area of the user device, so that the user devices discover the user devices capable of performing D2D communication with the user devices according to the user device list sent by the base station.

Fig. 2 is an example to describe in detail a device discovery method according to a second embodiment of the present invention, and fig. 2 is a flowchart of the device discovery method according to the second embodiment of the present invention. The main execution subject of the device discovery method is a base station. As shown in fig. 2, the device discovery method includes the steps of:

in step S201, device information of the first user equipment is acquired.

The first user equipment may specifically be a user equipment having a D2D communication function. The device information may include: D2D communication capability of the first user device, D2D ID of the first user device, and the like.

Step S202, adding the acquired device information to the user device list.

The user equipment list is a user equipment list or a plurality of user equipment lists.

When the user equipment list is multiple, each user equipment list has a classification identifier. The classification manner of the plurality of user equipment lists is not limited. For example, the device information of the first user equipment in the cell is divided into a user equipment list, and the device information of the first user equipment in each neighboring cell is divided into a user equipment list; or, classifying according to the time of adding to the user equipment list, for example, using the equipment information of the first user equipment added to the user equipment list within 10 minutes as the user equipment list 1, using the equipment information of the first user equipment added to the user equipment list within 10-30 minutes as the user equipment list 2, and using the equipment information of the first user equipment added to the user equipment list for more than 30 minutes as the user equipment list 3; or classifying according to the distance between the first user equipment and the base station, for example, using the equipment information of the first user equipment 100 meters away from the base station as a user equipment list 1, using the equipment information of the first user equipment 5000 meters away from the base station as a user equipment list 2, and using the equipment information of the first user equipment more than 5000 meters away from the base station as a user equipment list 3. Or dividing the area covered by the base station into a plurality of sub-areas, and taking the device information of the first user device in each sub-area as a user device list.

Step S203, sending the classification identification of the user equipment list to the second user equipment within the coverage of the base station.

In order to enable the second user equipment within the coverage area of the base station to acquire the classifications of the multiple user equipment lists, the base station needs to send classification identifiers of the user equipment lists to the second user equipment, so that the second user equipment can request the corresponding user equipment lists from the base station according to the classifications.

Step S204, receiving a request for obtaining the user equipment list sent by the second user equipment.

Optionally, the request for obtaining the ue list carries a class identifier corresponding to the ue list required by the second ue, so that the base station sends the corresponding ue list to the second ue within the coverage of the base station according to the received class identifier.

Optionally, the ue list request carries one bit or multiple bits. One bit is used to instruct the base station whether to send a default user equipment list in the multiple user equipment lists to the user equipment within the coverage of the base station, or to instruct the base station to send a corresponding user equipment list in the multiple user equipment lists to the second user equipment within the coverage of the base station according to the state indicated by the one bit, wherein the default user equipment list may be one, multiple or all user equipment lists. The plurality of bits correspond to the class identifier, and the class identifier is used for instructing the base station to determine a user equipment list sent to the second user equipment according to the class identifier corresponding to the plurality of bits. For example, if there are 8 ue lists in the base station, the bits are 3 bits, where 000 corresponds to the class id of ue list 1, 001 corresponds to the class id of ue list 2, 010 corresponds to the class id of the ue list, and so on.

Step S205, sending the user equipment list to the second user equipment within the coverage of the base station.

After receiving a second user equipment list request sent by second user equipment, the base station sends the user equipment list only to the second user equipment sending the user equipment list acquisition request or a group of second user equipment including the second user equipment sending the user equipment list acquisition request or any second user equipment within the coverage range of the base station.

Optionally, when the request for obtaining the user equipment list carries the classification identifier, the base station sends the user equipment list corresponding to the classification identifier to the second user equipment within the coverage of the base station according to the received classification identifier.

Optionally, when the request for obtaining the ue list carries a bit, if the bit is 0 (or 1), the base station does not send any ue list to the second ue within the coverage of the base station; if the one bit is 1 (or 0), the base station transmits a default user equipment list among the plurality of user equipment lists to a second user equipment within the coverage of the base station.

Or, when the request for obtaining the user equipment list carries a bit, if the bit is 0 (or 1), the base station sends a first default user equipment list in the multiple user lists to second user equipment within the coverage of the base station; if the one bit is 1 (or 0), the base station transmits a second default user equipment list among the plurality of user equipment lists to a second user equipment within the coverage of the base station.

Optionally, when the request for obtaining the ue list carries multiple bits, the base station first determines the ue list to be sent according to the class identifier corresponding to the multiple bits, and then sends the determined ue list to a second ue within the coverage of the base station.

The manner in which the base station sends the user equipment list to the second user equipment is the same as the manner in which the base station sends the user equipment list to the second user equipment in the first embodiment, and details are not repeated here.

By using the device discovery method provided by the second embodiment of the present invention, the base station adds the acquired device information including the ID of the user device D2D to the user device list, where the user device list is a plurality of user device lists, and then sends the classification identifier of the user device list to the user device, so that the user device can request the base station for the corresponding user device list according to its own requirements. And the base station sends a required user equipment list to the user equipment in the coverage area thereof according to the user equipment list request, so that the user equipment discovers the user equipment capable of performing D2D communication with the user equipment according to the user equipment list sent by the base station.

Fig. 3 is an example to describe in detail a device discovery method provided by the third embodiment of the present invention, and fig. 3 is a flowchart of the device discovery method provided by the third embodiment of the present invention. The device discovery method is performed by a user equipment, which may further be a user equipment having a D2D communication function. As shown in fig. 3, the device discovery method includes the steps of:

in step S301, a user equipment list is acquired.

The user equipment list includes device information, which may include: D2D communication capabilities of the user device, D2D identifiers of the user device, and the like.

The user equipment list is sent by the base station, and the base station firstly acquires the equipment information of the user equipment and then adds the equipment information to the user equipment list. The base station can obtain the equipment information by receiving the user equipment list of the neighbor base station, and can also receive the equipment information sent by the user equipment.

Therefore, before step S301, the method further comprises transmitting the device information to the base station.

Specifically, the ue may send the device information to the base station triggered by an event. For example, when a ue in the coverage of a base station is powered on, when the ue is handed over from another cell or randomly accesses to the base station, or when the peer-to-peer traffic of the ue in the coverage of the base station is large, the ue sends device information to the base station. In addition, the user equipment can also actively send the equipment information to the base station. For example, after the ue in the coverage of the base station is powered on, the ue does not need to send the device information to the base station when the user does not select to use the D2D function, and sends the device information to the base station when the user selects to use the D2D function. Or after the user equipment in the coverage area of the base station is started or uses the D2D function, inquiring whether the user equipment is added into the user equipment list of the base station or not, and when the user agrees to add, sending the equipment information of the user equipment to the base station. Or the user equipment in the coverage area of the base station sends a request for joining the user equipment list of the base station to the base station, and the user equipment information is sent to the base station after the base station agrees.

In addition, before step S301, the method may further include: and sending a user equipment list joining confirmation message or a user equipment list joining request to the base station, so that the base station adds the received equipment information to the user equipment list when receiving the user equipment joining list joining confirmation message or the user equipment joining list request.

The user equipment can directly acquire the user equipment list sent by the base station. Alternatively, before acquiring the ue list, the ue may send a request for acquiring the ue list to the base station, so that the base station sends the ue list to the ues in its coverage area after receiving the acquired ue list.

Optionally, the user equipment acquires the user equipment list sent by the base station through a broadcast channel or a multicast channel.

Optionally, the ue obtains downlink control information sent by the base station through a common search space or a dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel, where the downlink control information carries a ue list.

Optionally, the ue obtains downlink control information through a common search space or a dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel, where the downlink control information carries an indication identifier, and then the ue obtains a ue list sent by the base station from a physical downlink shared channel according to the indication identifier.

Step S302, discovering the user equipment according to the acquired user equipment list.

And the user equipment discovers the user equipment capable of carrying out D2D communication with the user equipment according to the acquired user equipment list.

By using the device discovery method provided by the third embodiment of the present invention, after the user device acquires the user device list including the device information, since the device information includes the ID of the user device D2D, the user device discovers, according to the user device list, the user device with which D2D communication can be performed.

Fig. 4 is an example of a detailed description of a device discovery method provided by the fourth embodiment of the present invention, and fig. 4 is a flowchart of the device discovery method provided by the fourth embodiment of the present invention. The device discovery method is performed by a user equipment, which may further be a user equipment having a D2D communication function. As shown in fig. 4, the device discovery method includes the steps of:

step S401, receives the classification identifier of the user equipment list sent by the base station.

The user equipment list is a plurality of user equipment lists, and each user equipment list is provided with a classification identifier. The classification manner of the plurality of user equipment lists is not limited. For example, the device information of the user equipment in the cell is divided into a user equipment list, and the device information of the user equipment in each neighboring cell is divided into a user equipment list; or, classifying according to the time of adding to the user equipment list; or classifying according to the distance between the user equipment and the base station; or dividing the area covered by the base station into a plurality of sub-areas, and taking the device information corresponding to the user device in each sub-area as a user device list.

In addition, the base station may obtain the device information by receiving the user equipment list of the neighboring base station, and may also receive the device information sent by the user equipment.

Thus, the method further comprises: the user equipment transmits the device information to the base station.

Specifically, the ue may send the device information to the base station triggered by an event. For example, when a ue in the coverage of a base station is powered on, when the ue is handed over from another cell or randomly accesses to the base station, or when the peer-to-peer traffic of the ue in the coverage of the base station is large, the ue sends device information to the base station. In addition, the user equipment can also actively send the equipment information to the base station. For example, after the ue in the coverage of the base station is powered on, the ue does not need to send the device information to the base station when the user does not select to use the D2D function, and sends the device information to the base station when the user selects to use the D2D function. Or after the user equipment in the coverage area of the base station is started or uses the D2D function, inquiring whether the user equipment is added into the user equipment list of the base station or not, and when the user agrees to add, sending the equipment information of the user equipment to the base station. Or the user equipment in the coverage area of the base station sends a request for adding the user equipment list to the base station, and the base station sends the equipment information of the user equipment after the base station agrees.

In addition, the method may further include: and sending a user equipment list joining confirmation message or a user equipment list joining request to the base station, so that the base station adds the received equipment information to the user equipment list when receiving the user equipment joining list joining confirmation message or the user equipment joining list request.

Step S402, sending a request for obtaining the user equipment list to the base station.

Optionally, the request for obtaining the ue list carries a class identifier corresponding to the ue list required by the ue, so that the base station sends a corresponding ue list to the ues within the coverage of the base station according to the received class identifier.

Optionally, the get user equipment list request carries one bit or multiple bits. One bit is used to instruct the base station whether to send a default user equipment list in the multiple user equipment lists to the user equipment within the coverage of the base station, or to instruct the base station to send a corresponding user equipment list in the multiple user equipment lists to the user equipment within the coverage of the base station according to a state indicated by the one bit, wherein the default user equipment list may be one, multiple or all user equipment lists. For example, when the one bit is 0 (or 1), the base station is instructed not to transmit any user equipment list to the user equipment within the coverage of the base station; and when the one bit is 1 (or 0), the base station is instructed to send a default user equipment list in the plurality of user equipment lists to the user equipment in the coverage area of the base station. Or, when the user equipment list request is one bit, if the one bit is 0 (or 1), the base station sends a first default user equipment list to the user equipment within the coverage of the base station; if the one bit is 1 (or 0), the base station is instructed to transmit a second default user equipment list to the user equipment within the coverage of the base station. The multiple bits correspond to the classification identifiers, and the classification identifiers are used for instructing the base station to determine a user equipment list sent to the user equipment according to the classification identifiers corresponding to the multiple bits. For example, if there are 8 ue lists in the base station, the bits are 3 bits, where 000 corresponds to the class id of ue list 1, 001 corresponds to the class id of ue list 2, 010 corresponds to the class id of ue list 3, and so on.

Step S403, obtain a user equipment list sent by the base station.

The method for the user equipment to obtain the user equipment list is the same as the process for the user equipment to obtain the user equipment list in the third embodiment, and details are not repeated here.

Step S404, discovering the user equipment according to the acquired user equipment list.

With the device discovery method provided by the fourth embodiment of the present invention, the ue list in the base station is one or more ue lists, the ue receives the classification identifier of the ue list sent by the base station, then requests the corresponding ue list from the base station according to its own requirement, and receives the ue list sent by the base station according to the ue list request, and since the device information in the ue list includes the ID of the ue D2D, the ue can discover the ue capable of performing D2D communication with the ue according to the ue list sent by the base station.

Fig. 5 is an example of a base station according to a fifth embodiment of the present invention, and fig. 5 is a schematic structural diagram of the base station according to the fifth embodiment of the present invention. The base station is used for implementing the device discovery method provided by the embodiment of the invention. As shown in fig. 5, the base station includes: an acquiring unit 510, an adding unit 520 and a first sending unit 530.

The obtaining unit 510 is configured to obtain device information of the first user equipment, where the device information includes D2D communication capability of the first user equipment, D2D ID of the first user equipment, and the like.

Optionally, the obtaining unit 510 is specifically configured to obtain the device information by receiving the device information sent by the first user equipment.

Optionally, the obtaining unit 510 is specifically configured to receive a user equipment list sent by the neighboring base station, and obtain the device information from the user equipment list sent by the neighboring base station.

Adding unit 520 is configured to add the acquired device information to the user equipment list.

Specifically, after the obtaining unit 510 obtains the device information, the adding unit 520 may directly add the device information to the user equipment list; the obtained device information may also be cached, and when the base station determines that the traffic volume of the first user equipment corresponding to the obtained device information exceeds a threshold and/or the communication mode changes and/or receives a user equipment list joining confirmation message or a user equipment list joining request sent by the corresponding first user equipment, the device information of the first user equipment is added to the user equipment list.

A first sending unit 530, configured to send the user equipment list to the second user equipment within the coverage of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list.

Specifically, the first sending unit 530 sends the user equipment list to any second user equipment within the coverage of the base station. Alternatively, the first sending unit 530 sends the user equipment list to a second user equipment within the coverage of the base station and included in the user equipment list. Or, the base station may further include a receiving unit 540, before the first sending unit 530 sends the ue list, the receiving unit 540 may receive a request for obtaining the ue list sent by the second ue, and then the first sending unit 530 sends the ue list only to the second ue sending the request for obtaining the ue list, or after the receiving unit 540 receives the request for obtaining the ue list sent by the second ue, sends the ue list to a group of second ues including the second ue sending the request for obtaining the ue list or any second ues within the coverage of the base station.

Optionally, the first sending unit 530 sends the user equipment list to a second user equipment in its coverage area through a broadcast channel or a multicast channel; when the user equipment list is sent to one or more second user equipments in the coverage area of the user equipment, the user equipment list can be sent through a multicast channel, and the second user equipments acquire the user equipment list from a broadcast channel or the multicast channel, so that the first user equipments capable of performing D2D communication are found according to the user equipment list.

Optionally, when sending the ue list to the second ue in the coverage area of the first sending unit 530, sending downlink control information to the second ue through a common search space or a dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel, where the downlink control information carries the ue list. All the second user equipments within the coverage of the base station may obtain the user equipment list carried by the downlink control information from the common search space of the physical downlink control channel or the enhanced physical downlink control channel or a specific second user equipment within the coverage of the base station may obtain the user equipment list carried by the downlink control information from the dedicated search space of the physical downlink control channel or the enhanced physical downlink control channel, so as to find the first user equipment capable of performing D2D communication according to the user equipment list.

Optionally, when sending the ue list to the second ue in the coverage area of the first sending unit 530, sending the ue list through a downlink physical shared channel, and sending downlink control information to the ue through a physical downlink control channel or a common search space or a dedicated search space of an enhanced physical downlink control channel, where the downlink control information carries an indication identifier, where the indication identifier is used to indicate the second ue to obtain the ue list on the physical downlink shared channel. All the second user equipments within the coverage of the base station may obtain the downlink control information from the common search space of the physical downlink control channel or the enhanced physical downlink control channel or a specific second user equipment within the coverage of the base station may obtain the downlink control information from the dedicated search space of the physical downlink control channel or the enhanced physical downlink control channel, and then obtain a user equipment list sent by the base station from the physical downlink shared channel according to the indication identifier carried by the downlink control information, so as to find the first user equipment capable of performing D2D communication according to the user equipment list.

By using the base station provided by the fifth embodiment of the present invention, the base station adds the acquired device information including the ID of the user device D2D to the user device list, and then sends the user device list to the user devices within the coverage area of the user device, so that the user devices can discover the user devices capable of performing D2D communication with the user devices according to the user device list sent by the base station.

It should be noted that, the base station is used to implement the device discovery method according to the first embodiment, and each included unit is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

Fig. 6 is an example of a base station according to a sixth embodiment of the present invention, and fig. 6 is a schematic structural diagram of the base station according to the sixth embodiment of the present invention. The base station is used for implementing the device discovery method provided by the second embodiment of the invention. As shown in fig. 6, the base station includes: acquiring unit 610, adding unit 620, second transmitting unit 630, receiving unit 640 and first transmitting unit 650.

The obtaining unit 610 is configured to obtain device information of the first user equipment.

The first user equipment may specifically be a user equipment having a D2D communication function. The device information may include: D2D communication capabilities of the user device, D2D ID of the user device, and the like.

Optionally, the obtaining unit 610 is specifically configured to obtain the device information by receiving the device information sent by the first user equipment.

Specifically, the first user equipment may send the device information to the base station triggered by an event. In addition, the first user equipment may also actively send the device information to the base station.

Optionally, the obtaining unit 610 is specifically configured to receive a user equipment list sent by the neighboring base station, and obtain the device information from the user equipment list sent by the neighboring base station.

The adding unit 620 is configured to add the acquired device information to the user equipment list.

Specifically, after the obtaining unit 610 obtains the device information, the adding unit 620 directly adds the device information to the user equipment list; the obtained device information may also be cached, and when the base station determines that the traffic volume of the first user equipment corresponding to the obtained device information exceeds a threshold and/or the communication mode changes and/or receives a user equipment list joining confirmation message or a user equipment list joining request sent by the corresponding first user equipment, the device information of the first user equipment is added to the user equipment list.

The second sending unit 630 is configured to send the category identifier of the user equipment list to a second user equipment within the coverage of the base station.

In order to enable the second user equipment within the coverage area of the base station to know the classifications of the multiple user equipment lists, the second sending unit 630 needs to send the classification identifiers of the user equipment lists to the second user equipment, so that the second user equipment can request the base station for the corresponding user equipment lists according to the classifications.

The receiving unit 640 is configured to receive a request for obtaining a user equipment list sent by a second user equipment.

Optionally, the get user equipment list request carries one bit or multiple bits. One bit is used to instruct the base station whether to send a default user equipment list in the multiple user equipment lists to the user equipment within the coverage of the base station, or to instruct the base station to send a corresponding user equipment list in the multiple user equipment lists to the second user equipment within the coverage of the base station according to the state indicated by the one bit, wherein the default user equipment list may be one, multiple or all user equipment lists. The plurality of bits correspond to the class identifier, and the class identifier is used for instructing the base station to determine a user equipment list sent to the second user equipment according to the class identifier corresponding to the plurality of bits. For example, if there are 8 ue lists in the base station, the bits are 3 bits, where 000 corresponds to the class id of ue list 1, 001 corresponds to the class id of ue list 2, 010 corresponds to the class id of the ue list, and so on.

The first sending unit 650 is configured to send the user equipment list to a second user equipment within the coverage of the base station.

Specifically, the first sending unit 650 sends the user equipment list only to the second user equipment sending the request for obtaining the user equipment list or a group of second user equipments including the second user equipment sending the request for obtaining the user equipment list or any second user equipment within the coverage of the base station.

Optionally, when the ue list request carries the class identifier, the first sending unit 650 sends the ue list corresponding to the class identifier to the second ue in the coverage of the base station according to the received class identifier.

Alternatively, when the ue list request is one bit, if the one bit is 0 (or 1), the first transmitting unit 650 does not transmit any ue list to the second ue within the coverage of the base station; if the one bit is 1 (or 0), the first transmitting unit 630 transmits a default user equipment list among the plurality of user equipment lists to a second user equipment within the coverage of the base station.

Or, when the ue list request is one bit, if the one bit is 0 (or 1), the first sending unit 630 sends a first default ue list in the multiple ue lists to a second ue within the coverage of the base station; if the one bit is 1 (or 0), the first transmitting unit 630 transmits a second default user equipment list among the plurality of user equipment lists to a second user equipment within the coverage of the base station.

When the ue list request is a plurality of bits, the first sending unit 650 first determines a ue list to be sent according to the class identifier corresponding to the plurality of bits, and then sends the determined ue list to a second ue within the coverage of the base station.

The manner of sending the ue list to the second ue by the first sending unit 650 is the same as the manner of sending the ue list to the second ue by the first sending unit 530 in the fifth embodiment, and is not described herein again.

By using the base station provided by the sixth embodiment of the present invention, the base station adds the acquired device information including the ID of the user device D2D to the user device list, where the user device list is a plurality of user device lists, and then sends the classification identifier of the user device list to the user device, so that the user device can request the base station for the corresponding user device list according to its own requirements. And the base station sends a required user equipment list to the user equipment in the coverage area thereof according to the user equipment list request, so that the user equipment discovers the user equipment capable of performing D2D communication with the user equipment according to the user equipment list sent by the base station.

It should be noted that, the base station is used to implement the device discovery method according to the second embodiment, and each unit included in the base station is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

Fig. 7 is a schematic structural diagram of a base station according to a seventh embodiment of the present invention. The base station comprises a transceiver 710, a memory 720 and a processor 730 coupled to the transceiver 710 and the memory 720, respectively. Of course, the base station may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiments of the present invention are not limited in any way here. The base station can be used for realizing the device discovery methods described in the first and second embodiments of the present invention.

The transceiver 710 is used for communicating with user equipment, other base stations, and the like.

A set of program codes is stored in memory 720 and processor 730 is used to invoke the program codes stored in memory 720 for performing the following operations:

acquiring equipment information of first user equipment, wherein the equipment information comprises an identifier of the first user equipment in point-to-point communication;

populating the device information to a user device list;

and sending the user equipment list to second user equipment within the coverage range of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list.

Further, the ue list is a ue list or a plurality of ue lists.

Further, adding the device information to the user equipment list specifically includes:

adding device information of a first user equipment to a user equipment list when it is determined that the traffic volume of the first user equipment exceeds a threshold; and/or adding the device information of the first user equipment to a user equipment list when the communication mode of the first user equipment is determined to be changed; and/or adding the equipment information of the first user equipment to the user equipment list when receiving a confirmation message of adding the user equipment list or a request of adding the user equipment list, which is sent by the first user equipment.

Further, the sending the user equipment list to the second user equipment within the coverage of the base station specifically includes:

sending the user equipment list to second user equipment which is within the coverage range of the base station and is included in the user equipment list; or, the user equipment list is sent to any second user equipment within the coverage range of the base station.

Further, before said sending said list of user equipments to a second user equipment in the coverage area of said base station, the processor 730 calls the program code stored in the memory 720, and is further configured to:

receiving a request for acquiring a user equipment list sent by second user equipment; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: and sending the request for obtaining the user equipment list to the second user equipment or a group of second user equipment including the second user equipment which sends the request for obtaining the user equipment list.

transmitting the user equipment list to the second user equipment through a broadcast channel or a multicast channel; or sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information carries the user equipment list; or, the user equipment list is sent through a physical downlink shared channel; and sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information is used for indicating the second user equipment to acquire the user equipment list in the physical downlink shared channel.

Further, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the sending of the downlink control information to the second user equipment through the downlink control channel specifically includes: and sending downlink control information to the second user equipment through a common or dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel.

Further, when the user equipment list is a plurality of user equipment lists, the first user equipment is classified according to the access time of the first user equipment, the distance between the first user equipment and the base station, or the area where the first user equipment is located, and each type of first user equipment forms one user equipment list.

sending the classification identifications of the plurality of user equipment lists to second user equipment within the coverage range of the base station; receiving a user equipment list acquisition request sent by the second user equipment, wherein the user equipment list acquisition request carries a classification identifier corresponding to a user equipment list required by the second user equipment; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: and sending the user equipment list corresponding to the classification identifier carried by the user equipment list acquisition request to second user equipment in the coverage range of the base station.

sending the classification identifications of the plurality of user equipment lists to second user equipment within the coverage range of the base station; receiving a user equipment list request sent by user equipment, wherein the user equipment list request carries one bit or a plurality of bits, and the bits correspond to the classification identification; the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes: when the user equipment list requests to carry a bit, the base station determines whether to send a default user equipment list in the multiple user equipment lists to second user equipment in a coverage range of the base station or send a corresponding user equipment list in the multiple user equipment lists to the second user equipment in the coverage range of the base station according to the state indicated by the bit; and when the user equipment list requests to carry a plurality of bits, the base station sends the user equipment list corresponding to the classification identifications corresponding to the plurality of bits to second user equipment within the coverage range of the base station.

With the base station provided by the seventh embodiment of the present invention, the base station adds the acquired device information including the ID of the user device D2D to the user device list, where the user device list is one or more user device lists, and then sends the classification identifier of the user device list to the user device, so that the user device can request the base station for the corresponding user device list according to its own requirements. And the base station sends a required user equipment list to the user equipment in the coverage area thereof according to the user equipment list request, so that the user equipment discovers the user equipment capable of performing D2D communication with the user equipment according to the user equipment list sent by the base station.

Fig. 8 is an example of a user equipment according to an eighth embodiment of the present invention, and fig. 8 is a schematic structural diagram of the user equipment according to the eighth embodiment of the present invention. The user equipment has a D2D communication function, and is used to implement the device discovery method provided by the third embodiment of the present invention. As shown in fig. 8, the user equipment includes: an acquisition unit 810 and a discovery unit 820.

The obtaining unit 810 is configured to obtain a user equipment list, where the user equipment list includes device information, and the device information includes D2D communication capability of the user equipment, D2D identifier of the user equipment, and the like.

Therefore, the user equipment further comprises a first transmitting unit 830 for transmitting the device information to the base station.

Specifically, the user equipment may be triggered by an event to cause the first transmitting unit 830 to transmit the equipment information to the base station. For example, when the ue in the coverage of the base station is powered on, when the ue is handed over from another cell or randomly accesses to the base station, or when the peer-to-peer traffic of the ue in the coverage of the base station is large, the first sending unit 830 sends the device information to the base station. In addition, the user equipment may also cause the first transmitting unit 830 to actively transmit the device information to the base station. For example, after the ue in the coverage of the base station is powered on, when the user does not select to use the D2D function, the first sending unit 830 need not send the device information to the base station, and when the user selects to use the D2D function, the first sending unit 830 sends the device information to the base station again. Or after the ue in the coverage of the base station is powered on or uses the D2D function, the ue queries whether the user equipment is added to the ue list of the base station, and when the user agrees to add, the first sending unit 830 sends the ue information to the base station. Or the ue in the coverage of the base station sends a request for joining the ue list to the base station, and the first sending unit 830 sends the ue information to the base station after obtaining the base station agreement.

In addition, the user equipment may further include: a second sending unit 840, configured to send a join ue list confirmation message or a join ue list request to the base station, so that the base station adds the received device information to the ue list when receiving the join ue list confirmation message or the join ue list request.

The obtaining unit 810 may directly obtain the user equipment list transmitted by the base station. Or, the apparatus further includes a third sending unit 850, before the obtaining unit 810 obtains the user equipment list, the third sending unit 850 sends a request for obtaining the user equipment list to the base station, so that the base station sends the user equipment list to the user equipment in its coverage area after receiving the obtained user equipment list.

Alternatively, the obtaining unit 810 obtains the list of the user equipments transmitted by the base station through a broadcast channel or a multicast channel.

Optionally, the obtaining unit 810 obtains the downlink control channel sent by the base station through a common search space or a dedicated search space of the physical downlink control channel or the enhanced physical downlink control channel, where the downlink control channel control information carries the user equipment list.

Optionally, the obtaining unit 810 obtains downlink control information through a common search space or a dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel, where the downlink control information carries an indication identifier, and then the obtaining unit 810 obtains a user equipment list sent by a base station from a physical downlink shared channel according to the indication identifier.

The discovery unit 820 is configured to discover the user equipment according to the obtained user equipment list.

The discovery unit 820 discovers a user equipment with which D2D communication can be performed, from the acquired user equipment list.

With the user equipment provided in the eighth embodiment of the present invention, after the user equipment acquires the user equipment list including the device information, since the device information includes the ID of the user equipment D2D, the user equipment discovers, according to the user equipment list, the user equipment with which D2D communication can be performed.

It should be noted that the user equipment is used to implement the device discovery method according to the third embodiment, and each included unit is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

Fig. 9 is an example to describe in detail a ue according to the ninth embodiment of the present invention, and fig. 9 is a schematic structural diagram of the ue according to the ninth embodiment of the present invention. The user equipment has a D2D communication function, and is used to implement the device discovery method provided by the fourth embodiment of the present invention. As shown in fig. 9, the user equipment includes: receiving section 910, first transmitting section 920, third transmitting section 930, acquiring section 940, and acquiring section 950.

The receiving unit 910 is configured to receive the classification identifier of the sub-user equipment list sent by the base station.

Therefore, the first transmitting unit 920 is used for the user equipment to transmit the device information to the base station.

Specifically, the user equipment may be triggered by an event to cause the first transmitting unit 920 to transmit the device information to the base station. For example, when the ue in the coverage of the base station is powered on, when the ue is handed over from another cell or randomly accesses to the base station, or when the peer-to-peer traffic of the ue in the coverage of the base station is large, the first sending unit 920 sends the device information to the base station. In addition, the user equipment may also cause the first transmitting unit 920 to actively transmit the device information to the base station. For example, after the ue in the coverage of the base station is powered on, the first sending unit 920 does not need to send the device information to the base station when the user does not select to use the D2D function, and the first sending unit 920 sends the device information to the base station when the user selects to use the D2D function. Or after the ue in the coverage of the base station is powered on or uses the D2D function, the ue queries whether the user equipment is added to the ue list of the base station, and when the user agrees to add, the first sending unit 920 sends the ue information to the base station. Or the ue in the coverage of the base station sends a request for joining the ue list to the base station, and the first sending unit 920 sends the device information of the ue to the base station after the base station agrees.

In addition, the user equipment may further include: a second sending unit 960, configured to send a join ue list confirmation message or a join ue list request to the base station, so that the base station adds the received device information to the ue list when receiving the join ue list confirmation message or the join ue list request.

The third transmitting unit 930 transmits a request for acquiring a user equipment list to the base station.

The obtaining unit 940 is configured to obtain a user equipment list sent by the base station.

The manner of acquiring the ue list by the acquiring unit 940 is the same as the process of acquiring the ue list by the acquiring unit 810 in the eighth embodiment, and details are not described here.

The discovery unit 950 is configured to discover the user equipment according to the obtained user equipment list.

The discovery unit 950 discovers, according to the acquired user equipment list, the user equipment with which D2D communication can be performed.

With the user equipment provided by the ninth embodiment of the present invention, the user equipment list in the base station is one or more user equipment lists, the user equipment receives the classification identifier of the user equipment list sent by the base station, then requests the corresponding user equipment list from the base station according to its own requirements, and receives the user equipment list sent by the base station according to the user equipment list request, and since the equipment information in the user equipment list includes the D2D ID of the user equipment, the user equipment can discover the user equipment capable of performing D2D communication with the user equipment according to the user equipment list sent by the base station.

It should be noted that the user equipment is used to implement the device discovery method according to the fourth embodiment, and each included unit is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

Fig. 10 is a schematic structural diagram of a user equipment according to a tenth embodiment of the present invention. The user equipment includes a transceiver 1010, a memory 1020, and a processor 1030 coupled to the transceiver 1010 and the memory 1020, respectively. Of course, the user equipment may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiment of the present invention is not limited in any way here. The user equipment can be used for realizing the equipment discovery methods described in the third and fourth embodiments of the present invention.

The transceiver 1010 is used for communicating with a device such as a base station.

A set of program codes is stored in memory 1020 and processor 1030 is configured to invoke the program codes stored in memory 1020 for performing the following operations:

and discovering the user equipment according to the user equipment list.

Further, the ue list is a ue list or a plurality of ue lists.

Further, the obtaining of the user equipment list sent by the base station specifically includes:

acquiring the user equipment list sent by the base station through a broadcast channel or a multicast channel; or, acquiring downlink control information sent by a base station through a downlink control channel, wherein the downlink control information carries the user equipment list; or, acquiring downlink control information sent by the base station through a downlink control channel, wherein the downlink control information carries an indication identifier; and acquiring the user equipment list sent by the base station from a physical downlink shared channel according to the indication identifier.

Further, the downlink control channel includes a physical downlink control channel or an enhanced physical downlink control channel; the acquiring, through the downlink control channel, the downlink control information sent by the base station specifically includes: and acquiring the downlink control information sent by the base station through a public or special search space of the physical downlink control channel or the enhanced physical downlink control channel.

Further, when the ue list is a plurality of ue lists, before the obtaining the ue list sent by the base station, the processor 1030 calls the program code stored in the memory 1020, and is further configured to:

receiving classification identifications of the plurality of user equipment lists sent by the base station; and sending a request for acquiring a user equipment list to the base station, wherein the request for acquiring the user equipment list carries the classification identifier of the required user equipment list, and the base station is used for sending the user equipment list corresponding to the classification identifier to the user equipment within the coverage range of the base station.

receiving classification identifications of the plurality of user equipment lists sent by the base station; sending a request for obtaining a user equipment list to the base station, wherein the request for obtaining the user equipment list carries one bit or a plurality of bits, and the plurality of bits correspond to the classification identifiers; the bit is used for indicating whether the base station sends a default user equipment list in the user equipment lists to the user equipment within the coverage range of the base station or indicating the base station to send a corresponding user equipment list in the user equipment lists to the user equipment within the coverage range of the base station according to the state indicated by the bit; the bits are used for instructing the base station to send a user equipment list corresponding to the classification identifications corresponding to the bits to the user equipment within the coverage of the base station.

With the user equipment provided in the tenth embodiment of the present invention, the user equipment list in the base station includes a plurality of sub-user equipment lists, the user equipment receives the classification identifier of the sub-user equipment list sent by the base station, then requests the user equipment list or a corresponding sub-user equipment list from the base station according to its own requirements, and receives the user equipment list or the sub-user equipment list sent by the base station according to the user equipment list request, and since the device information in the user equipment list or the sub-user equipment list includes the D2D ID of the user equipment, the user equipment can discover the user equipment capable of performing D2D communication with the user equipment according to the user equipment list or the sub-user equipment list sent by the base station.

Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for user equipment discovery, the method comprising:

adding the equipment information to a user equipment list by the base station;

the base station sends the user equipment list to second user equipment within the coverage range of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list;

wherein the user equipment list is a plurality of user equipment lists, the method further comprising:

and classifying the first user equipment according to the access time of the first user equipment, the distance between the first user equipment and the base station or the area of the first user equipment, wherein each type of first user equipment forms a user equipment list.

2. The method of claim 1, wherein adding the device information to a list of user devices is specifically:

adding device information of a first user equipment to a user equipment list when it is determined that the traffic volume of the first user equipment exceeds a threshold; and/or the presence of a gas in the gas,

adding device information of a first user device to a user device list when it is determined that a communication mode of the first user device changes; and/or the presence of a gas in the gas,

adding the equipment information of the first user equipment to a user equipment list when receiving a confirmation message of the user equipment list joining or a request of the user equipment list joining sent by the first user equipment.

3. The method according to claim 1 or 2, wherein the sending the user equipment list to the second user equipment within the coverage of the base station specifically comprises:

sending the user equipment list to second user equipment which is within the coverage range of the base station and is included in the user equipment list; or,

and sending the user equipment list to any second user equipment within the coverage range of the base station.

4. The method according to any of claims 1 or 2, wherein before said sending said list of user equipments to a second user equipment within the coverage of said base station, said method further comprises:

receiving a request for acquiring a user equipment list sent by second user equipment;

the sending of the user equipment list to the second user equipment within the coverage of the base station specifically includes:

and sending the request for obtaining the user equipment list to the second user equipment or a group of second user equipment including the second user equipment which sends the request for obtaining the user equipment list.

5. The method according to any of claims 1 or 2, wherein the sending the user equipment list to the second user equipment within the coverage of the base station specifically comprises:

transmitting the user equipment list to the second user equipment through a broadcast channel or a multicast channel; or,

sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information carries the user equipment list; or,

sending the user equipment list through a physical downlink shared channel; and sending downlink control information to the second user equipment through a downlink control channel, wherein the downlink control information is used for indicating the second user equipment to acquire the user equipment list in the physical downlink shared channel.

6. The method of claim 5, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel;

the sending of the downlink control information to the second user equipment through the downlink control channel specifically includes: and sending downlink control information to the second user equipment through a common or dedicated search space of a physical downlink control channel or an enhanced physical downlink control channel.

7. The method of claim 1, wherein before the sending the list of user equipments to the second user equipment in the coverage of the base station, the method further comprises:

sending the classification identifications of the plurality of user equipment lists to second user equipment within the coverage range of the base station;

receiving a user equipment list acquisition request sent by the second user equipment, wherein the user equipment list acquisition request carries a classification identifier corresponding to a user equipment list required by the second user equipment;

and sending the user equipment list corresponding to the classification identifier carried by the user equipment list acquisition request to second user equipment in the coverage range of the base station.

8. The method of claim 1, wherein before the sending the list of user equipments to the second user equipment in the coverage of the base station, the method further comprises:

receiving a user equipment list request sent by user equipment, wherein the user equipment list request carries one bit or a plurality of bits, and the bits correspond to the classification identification;

when the user equipment list requests to carry a bit, the base station determines whether to send a default user equipment list in the multiple user equipment lists to second user equipment in a coverage range of the base station or send a corresponding user equipment list in the multiple user equipment lists to the second user equipment in the coverage range of the base station according to the state indicated by the bit;

and when the user equipment list requests to carry a plurality of bits, the base station sends the user equipment list corresponding to the classification identifications corresponding to the plurality of bits to second user equipment within the coverage range of the base station.

9. A method for user equipment discovery, the method comprising:

receiving classification identifications of a plurality of user equipment lists sent by a base station;

sending a request for acquiring a user equipment list to the base station, wherein the request for acquiring the user equipment list carries a classification identifier of a required user equipment list, and the base station is used for sending the user equipment list corresponding to the classification identifier to the user equipment within the coverage range of the base station;

and discovering the user equipment according to the user equipment list.

10. The method according to claim 9, wherein the obtaining the list of the user equipments sent by the base station specifically comprises:

acquiring the user equipment list sent by the base station through a broadcast channel or a multicast channel; or,

acquiring downlink control information sent by a base station through a downlink control channel, wherein the downlink control information carries the user equipment list; or,

acquiring downlink control information sent by a base station through a downlink control channel, wherein the downlink control information carries an indication identifier; and acquiring the user equipment list sent by the base station from a physical downlink shared channel according to the indication identifier.

11. The method of claim 10, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel;

the acquiring, through the downlink control channel, the downlink control information sent by the base station specifically includes: and acquiring the downlink control information sent by the base station through a public or special search space of the physical downlink control channel or the enhanced physical downlink control channel.

12. The method of claim 9, wherein the request for obtaining the ue list carries one bit or multiple bits, and the multiple bits correspond to the class identifier;

the bit is used for indicating whether the base station sends a default user equipment list in the user equipment lists to the user equipment within the coverage range of the base station or indicating the base station to send a corresponding user equipment list in the user equipment lists to the user equipment within the coverage range of the base station according to the state indicated by the bit;

the bits are used for instructing the base station to send a user equipment list corresponding to the classification identifications corresponding to the bits to the user equipment within the coverage of the base station.

13. A base station, characterized in that the base station comprises:

an adding unit for adding the device information to a user equipment list;

a first sending unit, configured to send the user equipment list to a second user equipment within a coverage area of the base station, so that the second user equipment discovers the first user equipment according to the user equipment list;

wherein the ue list is a plurality of ue lists, and the adding unit is further configured to:

14. The base station according to claim 13, wherein the adding unit is specifically configured to:

15. The base station according to claim 13 or 14, wherein the first sending unit is specifically configured to:

16. The base station according to claim 13 or 14, characterized in that the base station further comprises:

the receiving unit is used for receiving a request for acquiring a user equipment list sent by second user equipment;

the first sending unit is specifically configured to send the second user equipment that sends the request for obtaining the user equipment list or a group of second user equipment including the second user equipment that sends the request for obtaining the user equipment list.

17. The base station according to claim 13 or 14, wherein the first sending unit is specifically configured to:

18. The base station of claim 17, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel;

19. The base station of claim 13, wherein the base station further comprises:

a second sending unit, configured to send the category identifiers of the multiple user equipment lists to a second user equipment within a coverage area of the base station;

a receiving unit, configured to receive a request for obtaining a user equipment list sent by the second user equipment, where the request for obtaining the user equipment list carries a classification identifier corresponding to a user equipment list required by the second user equipment;

the first sending unit is specifically configured to:

20. The base station of claim 13, wherein the base station further comprises:

a receiving unit, configured to receive a user equipment list request sent by user equipment, where the user equipment list request carries one bit or multiple bits, and the multiple bits correspond to the classification identifier;

the first sending unit is specifically configured to:

21. A user equipment, the user equipment comprising:

the receiving unit is used for receiving the classification identifications of the plurality of user equipment lists sent by the base station;

a second sending unit, configured to send a user equipment list request to the base station, where the user equipment list request carries a classification identifier of a required user equipment list, and the second sending unit is used for the base station to send a user equipment list corresponding to the classification identifier to user equipment in a coverage area of the base station;

22. The ue of claim 21, wherein the obtaining unit is specifically configured to:

23. The UE of claim 22, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel;

24. The UE of claim 21, wherein the request for obtaining the UE list carries one bit or multiple bits, and the multiple bits correspond to the category identifier;