Patent Document

This application is a US National Stage of International Application No. PCT/CN2013/080386,filed on Jul. 30, 2013, designating the United States, and claiming the benefit of Chinese Patent Application No. 201210281091.1, filed with the Chinese Patent Office on Aug. 8, 2012 and entitled “Method, device and system for controlling User Equipment (UE)”, which is hereby incorporated by reference in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to the field of communications and particularly to a method, device and system for controlling a User Equipment (UE). 
     BACKGROUND OF THE INVENTION 
     A mobile communication system is typically consisted of a User Equipment (UE), a radio access network and a core network. Particularly an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is a radio access system consisted of (evolved) Node B&#39;s ((e)NB&#39;s) connected with each other. An Evolved Packet Core (EPC) is a core network system, and the EPC includes a Home Subscriber Server (HSS), a Mobility Management Entity (MME) and a Gateway (GW), where the HSS is configured to store subscription data of subscribers, the MME is configured to perform mobility management on the UE, and the gateway is configured to perform functions of storing, forwarding and routing user plane data of the UE. 
     In a scenario where UEs communicate with each other, the UEs have to communicate with each other through relay and proxy functions available from the eNB and the gateway. 
     There is centralized control by the network in a Long Term Evolution (LTE) system, that is, both uplink and downlink data of a UE is transmitted and received under the control by the network, but there is no direct communication link between one UE and another, so the UEs have to communicate with each other through forwarding, and under the control, by the network and the UEs are not allowed to transmit uplink data by themselves, as illustrated in  FIG. 1 . 
     In the prior art, pure Device to Device (D2D) communication refers to direct communication between one UE and another through Bluetooth, Wireless Fidelity (WiFi), etc., over an unlicensed frequency band resource, and such D2D communication involving behaviors of subscribers themselves without being managed and controlled by a network operator can only be applied in a limited number of scenarios. 
     In another scheme, the D2D technology is introduced to the mobile communication operator network, and in this scheme, some direct communication is allowed between UEs so that one UE can obtain information directly from the other UE in the D2D scheme over direct communication links which can be set up under the control or assistance by the network, and D2D communication is performed between the UEs by discovering a proximate UE. As illustrated in  FIG. 2 , an evolved Node B (eNodeB) sets up uplink/downlink communication links respectively with a UE  1  and a UE  2  under the control by a Core Network (CN) to configure the UE  1  and the UE  2 , and the two configured UEs can perform D2D communication based upon configuration information. 
     There has not yet been defined in the prior art a solution to controlling a UE capable of proximity awareness. 
     SUMMARY OF THE INVENTION 
     Embodiments of the invention provide a method, device and system for controlling a User Equipment (UE) so as to control a UE capable of proximity awareness in a network to which a D2D communication mechanism for a mutual discovery and even direct communication between mobile devices is introduced. 
     Particular technical solutions according to the embodiments of the invention are as follows: 
     A method for controlling a User Equipment (UE) includes: 
     receiving, by a Mobility Management Entity (MME), a Device to Device (D2D) request message of a UE transmitted by an evolved Node B (eNB), determining requested D2D features according to the D2D request message, determining acceptable one of the requested D2D features and transmitting the accepted D2D feature to the eNB; and 
     judging, by the eNB, whether to accept the D2D request of the UE upon reception of the accepted D2D feature returned by the MME, and if so, then configuring by the eNB, resource and instructing the UE to perform configuration of the accepted D2D feature; otherwise, rejecting, by the eNB, the D2D request of the UE. 
     A method for controlling a User Equipment (UE) includes: 
     receiving, by an evolved Node B (eNB), a Device to Device (D2D) request from a UE; and 
     judging, by the eNB whether to accept the D2D request of the UE, and if so, then transmitting the D2D request message to a Mobility Management Entity (MME), and configuring resource and instructing the UE to perform configuration of an accepted D2D feature returned by the MME upon reception of the accepted D2D feature; otherwise, rejecting the D2D request of the UE, 
     wherein the accepted D2D feature returned by the MME is acceptable one of the D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message. 
     A network-side device includes: 
     a receiving component configured to receive a Device to Device (D2D) request message of a User Equipment (UE) transmitted by an evolved Node B (eNB); 
     a determining component configured to determine requested D2D features according to the D2D request message and to determine acceptable one of the requested D2D features; and 
     a transmitting component configured to transmit the accepted D2D feature to the eNB. 
     A network-side device includes: 
     a communicating component configured to receive a Device to Device (D2D) request message of a User Equipment (UE), to transmit the D2D request message to a Mobility Management Entity (MME) and to receive an accepted D2D feature returned by the MME, wherein the accepted D2D feature is acceptable one of D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message; and 
     a processing component configured to judge whether to accept the D2D request of the UE after the communicating component receives the accepted D2D feature, and if so, to configure resource and instruct the UE to perform configuration of the accepted D2D feature; otherwise, to reject the D2D request of the UE. 
     A network-side device includes: 
     a receiving component configured to receive a Device to Device (D2D) request message of a User Equipment (UE); and 
     a processing component configured to judge whether to accept the D2D request of the UE, and if so, to transmit the D2D request message to a Mobility Management Entity (MME), and to configure resource and instruct the UE to perform configuration of an accepted D2D feature returned by the MME upon reception of the accepted D2D feature; otherwise, to reject the D2D request of the UE, wherein the accepted D2D feature is acceptable one of D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message. 
     A system for controlling a UE includes: 
     a UE is configured to transmit a Device to Device (D2D) request message to an evolved Node B (eNB); 
     the eNB configured to receive the D2D request message of the UE, to transmit the request message to an Mobility Management Entity (MME), to judge whether to accept the D2D request of the UE upon reception of an accepted D2D feature returned by the MME, and if so, to configure resource and instruct the UE to perform configuration of the accepted D2D feature; otherwise, to reject the D2D request of the UE, or 
     the eNB configured to receive the D2D request message of the UE, to judge whether to accept the D2D request of the UE, and if so, to transmit the D2D request message to the MME, and to configure resource and instruct the UE to perform configuration of an accepted D2D feature returned by the MME upon reception of the accepted D2D feature; otherwise, to reject the D2D request of the UE; and 
     the MME configured to determine requested D2D features according to the D2D request message of the UE transmitted by the eNB, to determine acceptable one of the D2D features requested by the UE, and to transmit the accepted D2D feature to the eNB. 
     With the technical solutions above, in the embodiments of the invention, the UE transmits a D2D request message to the network side, and the MME determines acceptable one of D2D features requested by the UE and transmits the accepted D2D feature to the eNB, so that the MME controls the UE capable of proximity awareness; and 
     The eNB judges whether the D2D request of the UE is acceptable before or after receiving the D2D feature returned by the MME, and judges according to a result of the judgment whether to reject the D2D request of the UE, and when the D2D request of the UE is acceptable, the eNB configures resource according to the accepted D2D feature returned by the MME and instructs the UE to perform configuration of the accepted D2D feature, so that the eNB controls the UE capable of proximity awareness. 
     In summary a UE capable of proximity awareness can be controlled in a network to which a D2D communication mechanism for a mutual discovery and even direct communication between mobile devices is introduced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a schematic diagram of communication between UEs in the prior art; 
         FIG. 2  illustrates a schematic structural diagram of the network to which the D2D technology is introduced in the prior art; 
         FIG. 3  illustrates an architectural diagram of a system for controlling a UE according to an embodiment of the invention; 
         FIG. 4  illustrates a flow chart of a method for controlling a UE according to an embodiment of the invention; 
         FIG. 5  illustrates a flow chart of another method for controlling a UE according to an embodiment of the invention; 
         FIG. 6  illustrates a particular schematic flow chart of a first embodiment of the invention; 
         FIG. 7  illustrates a particular schematic flow chart of a second embodiment of the invention; 
         FIG. 8  illustrates a particular schematic flow chart of a third embodiment of the invention; 
         FIG. 9  illustrates a particular schematic flow chart of a fourth embodiment of the invention; 
         FIG. 10  illustrates a particular schematic flow chart of a fifth embodiment of the invention; 
         FIG. 11  illustrates a schematic structural diagram of a network-side device according to an embodiment of the invention; 
         FIG. 12  illustrates a schematic structural diagram of another network-side device according to an embodiment of the invention; and 
         FIG. 13  illustrates a schematic structural diagram of still another network-side device according to an embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Embodiments of the invention provide a method, device and system for controlling a User Equipment (UE) so as to control a UE capable of proximity awareness in a network to which a D2D communication mechanism for a mutual discovery and even direct communication between mobile devices is introduced. 
     Preferred embodiments of the invention will be described below in details with reference to the drawings. 
     In the following embodiments, a D2D feature might be any one of being capable of discovering another UE but incapable of being discovered by another UE; being capable of being discovered by another UE but incapable of discovering another UE; and being capable of discovering another UE and capable of being discovered by another UE. These are listed here only as examples, but there may also exist other D2D features in a real application, and they can be equally applicable, if any, to the following embodiments of the invention for controlling a UE without departing from the scope of the invention. 
     As illustrated in  FIG. 3 , there is a system for controlling a UE according to a first embodiment, and the system generally includes a UE  301 , an eNB  302  and an MME  303 , where: 
     The UE  301  is configured to transmit a D2D request message to the eNB  302 ; 
     The eNB  302  is configured to receive the D2D request message of the UE  301 , to transmit the request message to the MME  303 , to judge whether to accept the D2D request of the UE  301  upon reception of an accepted D2D feature returned by the MME  303 , and if so, to configure resource and instruct the UE  301  to perform configuration of the accepted D2D feature; otherwise, to reject the D2D request of the UE, or 
     The eNB  302  is configured to receive the D2D request message of the UE  301 , to judge whether to accept the D2D request of the UE  301 , and if so, to transmit the D2D request message to the MME  303 , and to configure resource and instruct the UE  301  to perform configuration of an accepted D2D feature returned by the MME  303  upon reception of the accepted D2D feature; otherwise, to reject the D2D request of the UE; and 
     The MME  303  is configured to determine requested D2D features according to the D2D request message of the UE  301  transmitted by the eNB  302 , to determine acceptable one of the D2D features requested by the UE, and to transmit the accepted D2D feature to the eNB  302 . 
     Particularly the D2D request message carries information about the requested D2D features and activation/deactivation indication information of the requested D2D features. 
     Preferably the UE carries the D2D feature-related information and the activation/deactivation indication information of the D2D features in a Radio Resource Control (RRC) message or a Non-Access Stratum (NAS) message, that is, the RRC message or the NAS message is used as the D2D request message. 
     Particularly the MME determines the D2D features requested by the UE according to the D2D feature-related information carried in the D2D request message. 
     Particularly the eNB instructs the UE to activate/deactivate the D2D feature accepted by the MME according to the activation/deactivation indication information carried in the D2D request message. 
     Preferably the D2D feature-related information includes any one of indication information for indicating the D2D features; the types of services for determining the D2D features; and the D2D features. These are listed here as examples but not intended to limit the scope of the invention, and, other types of D2D feature-related information may also be applicable, if any, in a real application without departing from the scope of the invention. 
     Particularly when the D2D feature-related information is the indication information or the types of services, the network side needs to determine the corresponding D2D features according to either the particular indication information or types of services, and when the D2D feature-related information is the D2D features, the network side can retrieve the D2D features directly. 
     Particularly when the D2D feature-related information is the types of services for determining the D2D features, the MME determines, according to a preset mapping relationship between the types of services and the D2D features, that the D2D features corresponding to the types of services carried in the D2D request message are the D2D features requested by the UE. 
     Particularly when the D2D feature-related information is the indication information for indicating the D2D features, the MME determines, according to a preset mapping relationship between the indication information and the D2D features, the D2D features corresponding to the indication information carried in the D2D request message are the D2D features requested by the UE. 
     In this embodiment, the MME determines the acceptable D2D feature particularly as follows: the MME determines a set of D2D features capable of serving the UE according to subscription data of the UE and a network policy; and the MME determines one of the D2D features requested by the UE, which belongs to the set is the acceptable D2D feature. 
     Particularly the network policy is typically configured so that in the event that the UE of a subscriber is roaming, the MME serving the current network judges whether to provide the UE with a D2D feature service according to subscription data of the UE stored at a home network and a real condition of the local network, that is, the D2D feature acceptable to the MME satisfies two conditions of being a D2D feature subscribed by the UE and a D2D feature supported by the current network. 
     Particularly the MME transmits the accepted D2D feature to the eNB after determining the acceptable D2D feature, and particularly the MME can transmit the accepted D2D feature to the eNB by carrying it in an Initial Context Create message; or the MME can transmit the accepted D2D feature to the eNB by carrying it in an S1 interface application protocol layer (S1-AP) message. 
     In a particular implementation, the eNB judges according to a current use condition of radio resources, interference strength, etc., whether the D2D request of the UE is acceptable upon reception of the D2D request message of the UE; and if so, then the eNB further forwards the D2D request message of the UE to the MME, the MME transmits the accepted D2D feature to the eNB after determining according to the D2D request message the D2D features requested by the UE and determining the acceptable D2D feature, and the eNB further configures the resource according to the D2D feature accepted by the MME and then instructs the UE to perform configuration of the D2D feature accepted by the ME; otherwise, the eNB rejects directly the D2D request of the UE and notifies the MME that the D2D request of the UE is unacceptable. 
     In another particular embodiment, the eNB forwards the D2D request message of the UE directly to the MME upon reception thereof, and the MME transmits the accepted D2D feature to the eNB after determining according to the D2D request message the D2D features requested by the UE and determining the acceptable D2D feature; and the eNB judges according to a current use condition of radio resources, interference strength, etc., whether the D2D request of the UE is acceptable, and if so, then the eNB configures the resource according to the D2D feature accepted by the MME and then instructs the UE to perform configuration of the D2D feature accepted by the ME; otherwise, the eNB rejects the D2D request of the UE and notifies the UE and the MME that the D2D request of the UE is rejected. 
     In this embodiment, the eNB configures the resource particularly as follows: the eNB allocates resource to be occupied for performing the D2D feature accepted by the MME or releases resource occupied by the D2D feature accepted by the MME. 
     Particularly the resource includes a common resource and/or a dedicated resource. 
     Particularly if the resource configured by the eNB for the D2D feature accepted by the MME is dedicated resource, then another UE, capable of proximity awareness, proximate to the UE needs to be notified of the configured dedicated resource, particularly in an RRC message or a broadcast message. 
     Particularly the UE transmits and/or receives a D2D service (with the D2D feature) over the configured resource. 
     Based upon the same inventive idea, a second embodiment of the invention provides a method for controlling a UE as illustrated in  FIG. 4 , which is a method in which firstly an MME and then an eNB performs admission control in the following detailed flow: 
     In the step  401 , an MME receives a D2D request message of a UE transmitted by an eNB, determines requested D2D features according to the D2D request message, determines acceptable one of the requested D2D features and transmits the accepted D2D feature to the eNB. 
     Particularly the D2D request message carries information about the requested D2D features and activation/deactivation indication information of the requested D2D features. 
     Particularly the MME determines the D2D features requested by the UE according to the D2D feature-related information carried in the D2D request message. 
     In this embodiment, the D2D feature-related information includes any one of indication information for indicating the D2D features; the types of services for determining the D2D features; and the D2D features. 
     Particularly when the D2D feature-related information is the types of services for determining the D2D features, the MME determines, according to a preset mapping relationship between the types of services and the D2D features, that the D2D features corresponding to the types of services carried in the D2D request message are the D2D features requested by the UE. 
     Particularly when the D2D feature-related information is the indication information for indicating the D2D features, the MME determines, according to a preset mapping relationship between the indication information and the D2D features, the D2D features corresponding to the indication information carried in the D2D request message are the D2D features requested by the UE. 
     Particularly the MME determines the acceptable one of the requested D2D features particularly as follows: the MME determines a set of D2D features capable of serving the UE according to subscription data of the UE and a network policy; and the MME determines one of the D2D features requested by the UE, which belongs to the set is the acceptable D2D feature. 
     In this embodiment, the MME can transmit the accepted D2D feature to the eNB particularly as follows: the MME transmits the accepted D2D feature to the eNB by carrying it in an Initial Context Create message; or the MME transmits the accepted D2D feature to the eNB by carrying it in an S1-AP message. 
     In the step  402 , the eNB judges whether to accept the D2D request of the UE upon reception of the accepted D2D feature returned by the MME, and if so, then the eNB configures resource and instructs the UE to perform configuration of the accepted D2D feature; otherwise, the eNB rejects the D2D request of the UE. 
     In a particular implementation, the eNB forwards the D2D request message of the UE directly to the MME; the MME determines the acceptable D2D feature according to the D2D request message of the UE and transmits the accepted D2D feature to the eNB; and the eNB judges according to a current use condition of radio resources, interference strength, etc., whether to accept the D2D request of the UE, and if so, then the eNB allocates resource to be occupied for performing the D2D feature accepted by the MME or releases resource occupied by the D2D feature accepted by the MME, and instructs the UE to perform configuration of the accepted D2D feature; otherwise, the eNB prohibits the UE from performing configuration of the accepted D2D feature, that is, the eNB rejects the D2D request of the UE. 
     In this embodiment, the eNB configures the resource and then instructs the UE to perform configuration of the accepted D2D feature accepted by the MME particularly as follows: the eNB instructs the UE to activate the accepted D2D feature accepted by the MME according to the activation indication information carried in the D2D request message; or 
     The eNB configures the resource and then instructs the UE to perform configuration of the accepted D2D feature accepted by the MME particularly as follows: the eNB instructs the UE to deactivate the accepted D2D feature accepted by the MME according to the deactivation indication information carried in the D2D request message 
     Based upon the same inventive idea, a third embodiment of the invention provides a method for controlling a UE as illustrated in  FIG. 4 , which is a method in which firstly an eNB and then an MME performs admission control in the following detailed flow: 
     In the step  501 , an eNB receives a D2D request message of a UE; 
     Particularly the D2D request message carries information about requested D2D features and activation/deactivation indication information of the D2D features. 
     Particularly the D2D feature-related information includes any one of indication information for indicating the D2D features; the types of services for determining the D2D features; and the D2D features. 
     In the step  502 , the eNB judges whether to accept the D2D request of the UE, and if so, then the eNB transmits the D2D request message to an MME, and configures resource and instructs the UE to perform configuration of an accepted D2D feature returned by the MME upon reception of the accepted D2D feature; otherwise, the eNB rejects the D2D request of the UE. 
     Particularly the accepted D2D feature returned by the MME is acceptable one of the D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message. 
     Particularly the eNB transmits the D2D request message to the MME, and then the MME determines the D2D features requested by the UE according to the D2D feature-related information carried in the D2D request message; the MME determines a set of D2D features capable of serving the UE according to subscription data of the UE and a network policy; and the MME determines one of the D2D features requested by the UE, which belongs to the set is the acceptable D2D feature. 
     Particularly when the D2D feature-related information is the types of services for determining the D2D features, the MME determines, according to a preset mapping relationship between the types of services and the D2D features, that the D2D features corresponding to the types of services carried in the D2D request message are the D2D features requested by the UE. 
     Particularly when the D2D feature-related information is the indication information for indicating the D2D features, the MME determines, according to a preset mapping relationship between the indication information and the D2D features, the D2D features corresponding to the indication information carried in the D2D request message are the D2D features requested by the UE. 
     In this embodiment, the UE can receive the accepted D2D feature returned by the MME in either of the following implementations: the eNB receives an Initial Context Create Request message, transmitted by the MME, carrying the accepted D2D feature and retrieves the accepted D2D feature; or the eNB receives an S1-AP message, transmitted by the MME, carrying the accepted D2D feature and retrieves the accepted D2D feature. 
     Particularly the eNB judges according to a current use condition of radio resources, interference strength, etc., whether to accept the D2D request of the UE upon reception of the D2D request message of the UE; and if so, then the eNB transmits the D2D request message of the UE to the MME, the MME determines the acceptable D2D feature according to the D2D request message of the UE and transmits the accepted D2D feature to the eNB, and the NB allocates resource to be occupied for performing the D2D feature accepted by the MME or releases resource occupied by the D2D feature accepted by the MME, and instructs the UE to perform configuration of the accepted D2D feature; otherwise, the eNB rejects directly the D2D request of the UE. 
     In the particular implementation, the eNB rejects the D2D request of the UE and notifies the UE and the MME that the D2D request of the UE is rejected. 
     In this embodiment, the eNB instructs the UE to activate/deactivate the D2D feature accepted by the ME according to the activation/deactivation indication information carried in the D2D request message. 
     A process of controlling a UE according to the embodiments of the invention will be described below in details with reference to a first particular embodiment to a sixth particular embodiment. 
     The following particular embodiments will be described below taking an eNB as an example, but a real application thereof will not be limited to an eNB. 
     In a first particular embedment, as illustrated in FIG. 6 , a UE being initially powered up activates/deactivates a D2D feature in this particular embodiment particularly as follow: 
     In the step  601 , a UE reports a D2D request, which can be carried in an NAS or RRC message, to an eNB to activate/deactivate a D2D feature in an Attach Request message, and the eNB handles the D2D request of the UE in the following two implementations upon reception thereof: 
     In a first implementation, the eNB forwards the D2D request directly, that is, the eNB proceeds directly to the step  602 ; and 
     In a second implementation, the eNB transmits the D2D request of the UE to an MME in the step  602  after determining according to a current use condition of radio resources and interference strength the D2D request to be accepted; and notifies the MME that the D2D request of the UE is unacceptable after determining the D2D request of the UE to be unacceptable. 
     In the step  602 , the eNB transmits to the MME an Attach Request message which can particularly be an NAS message or an S1-AP message carrying the D2D request of the UE. 
     In the step  603 , the MME performs identity authentication and security authentication on the UE. 
     In the steps  604  to  605 , the MME retrieves subscription data of the UE, including D2D features subscribed by the UE, from an HSS using an Update Location Request message and an Update Location ACK message. 
     In the steps  606  to  609 , a core network sets up a user plane bearer for the UE, and particularly the MME transmits a Create Session Request to a Serving Gateway (SGW), the SGW transmits the Create Session Request to a Packet Data Network Gateway (PDN GW), the PDN GW interacts with a Policy Control and Charging Rule (PCRF) function, the PCRF initiates an IP-Connectivity Access Network (IP-CAN) session creation or modification procedure, and then the PDG GW returns a Create Session Response to the SGW, thus completing the downlink setup, and if there is no link to be switched, then the PDN GW transmits first downlink data to the SGW, and the MME receives the Create Session Response returned by the PDN GW. 
     In the step  610 , the MME determines D2D features requested by the UE according to the D2D request of the UE and determines acceptable one of the D2D features requested by the UE according to the retrieved subscription data of the UE and a network policy, and the MME returns the D2D feature accepted by the MME to the eNB in an initial UE context creation procedure. 
     In the step  611 , the eNB handles an Initial UE Context Create Request message of the MME in the following two implementations upon reception thereof: 
     In correspondence to the first implementation of the step  601 , the eNB allocates or releases for the UE resource occupied for the D2D feature accepted by the MME after determining according to the current use condition of radio resources and interference strength the D2D request of the UE to be accepted; and notifies the MME and the UE that the D2D request of the UE is unacceptable after determining the D2D request of the UE to be unacceptable; and 
     In correspondence to the second implementation of the step  601 , the eNB transmits an RRC Connection Reconfigure message carrying the D2D feature accepted by the MME to the UE after allocating or releasing for the UE resource occupied for the D2D feature accepted by the MME. 
     The eNB transmits the information about the allocated or released resource and the D2D feature accepted by the MME to the UE, and the UE activates/deactivates the D2D feature, accepted by the MME, returned by the eNB. 
     In the step  612 , the UE returns an RRC Connection Reconfigure Complete message to the eNB, and then the eNB returns an Initial UE Context Create Response message to the MME. 
     In correspondence to the first implementation of the step  601 , the eNB carries in the message a result of whether the eNB accepts the D2D request of the UE. 
     In the steps  613  to  619 , the UE accesses the network and performs a bearer establishment procedure particularly as follows: the UE transmits a Direct Transfer message to the eNB, and the eNB transmits an Attach Complete message to the MME, thus completing the uplink setup, and the UE can transmit first uplink data to the PDN GW, the MME transmits a Modify Bearer Request to the SGW, and the SGW requests the PDN GW for modifying the bearer and forwards a Modify Bearer Response returned by the PDN GW to the MME upon reception thereof, thus completing the bearer modification procedure, and the PDN GW can transmit first downlink data to the UE. 
     The MME initiates a Notify Request to the HSS and receives a Notify Response returned by the HSS. 
     In a second particular embodiment, as illustrated in  FIG. 7 , an idle UE activates/deactivates a D2D feature in a service request procedure in this particular embodiment particularly as follow: 
     In the step  701 , a UE reports a D2D request, which can be carried in an NAS or RRC message, to an eNB to activate/deactivate a D2D feature in a Service Request message. The eNB handles the D2D request of the UE in the following two implementations upon reception thereof: 
     In a first implementation, the eNB forwards the D2D request directly to an MME; and 
     In a second implementation, the eNB transmits the D2D request of the UE to the MME after determining according to a current use condition of radio resources and interference strength the D2D request to be accepted; and notifies the MME that the D2D request of the UE is unacceptable after determining the D2D request of the UE to be unacceptable. 
     In the step  702 , the eNB transmits to the MME a Service Request message which can be an NAS or S1-AP message. 
     In the step  703 , the MME performs identity authentication and security authentication on the UE. 
     In the step  704 , the MME determines D2D features requested by the UE according to the D2D request of the UE and determines acceptable one of the D2D features requested by the UE according to retrieved subscription data of the UE and a network policy, and the MME returns the D2D feature accepted by the MME to the eNB in an initial UE context creation procedure. 
     In the step  705 , the eNB handles an Initial UE Context Create Request message of the MME in the following two implementations upon reception thereof: 
     In correspondence to the first implementation of the step  701 , the eNB allocates or releases for the UE resource occupied for the D2D feature accepted by the MME after determining according to the current use condition of radio resources and interference strength the D2D request of the UE to be accepted; and notifies the MME and the UE that the D2D request of the UE is unacceptable after determining the D2D request of the UE to be unacceptable; and 
     In correspondence to the second implementation of the step  701 , the eNB transmits an RRC Connection Reconfigure message carrying the D2D feature accepted by the MME to the UE after allocating or releasing for the UE resource occupied for the D2D feature accepted by the MME. 
     The eNB transmits the information about the allocated or released resource and the D2D feature accepted by the MME to the UE, and the UE activates/deactivates the D2D feature, accepted by the MME, returned by the eNB. 
     In the step  706 , the UE transmits uplink data to the network side. 
     In the step  707 , the eNB returns an Initial UE Context Create Complete response message to the MME. 
     In correspondence to the first implementation of the step  701 , the eNB carries in the response message a result of whether the eNB accepts the D2D request of the UE. 
     In the steps  708  to  712 , the MME transmits a Modify Bearer Request to the SGW, the SGW forwards it to the PDN GW, then the PDN GW initiates an IP-CAN session modification procedure to the PCRF and then returns a Modify Bearer Response to the SGW, and the SGW transmits the response to the MME. 
     In a third particular embodiment, as illustrated in  FIG. 8 , an idle UE activates/deactivates a D2D feature in a Tracking Area Update (TAU) procedure in this particular embodiment particularly as follow: 
     In the step  801 , a UE triggers a TAU procedure to be started. 
     In the step  802 , the UE reports a D2D request, which can be carried in an NAS or RRC message, to an eNB to activate/deactivate a D2D feature in a TAU Request message. The eNB handles the D2D request of the UE in the following two implementations upon reception thereof: 
     In a first implementation, the eNB forwards the D2D request directly to an MME; and 
     In a second implementation, the eNB transmits the D2D request of the UE to the MME after determining according to a current use condition of radio resources and interference strength the D2D request to be accepted; and notifies the MME that the D2D request of the UE is unacceptable after determining the D2D request of the UE to be unacceptable. 
     In the step  803 , the eNB transmits a TAU Request message, which can be an NAS or S1-AP message, to a new MME (i.e., an MME to which the UE is roaming) 
     In the steps  804  to  807 , the new MME retrieves subscription data of the UE, including D2D features subscribed by the UE, from the old MME (i.e., an MME to which the UE subscribes). Particularly the new MME transmits a Context Request to the old MME, and the old MME carries the subscription data of the UE in a returned Context Response. The new MME returns an acknowledgement message (Context Acknowledge) to the old MME to retrieve the context after performing identity authentication and security authentication on the UE. 
     The new MME determines D2D features requested by the UE according to the D2D request of the UE, and determines acceptable one of the D2D features requested by the UE according to the retrieved subscription data of the UE and a network policy. 
     In the steps  808  to  819 , a core network establishes a user plane bearer for the UE. 
     Particularly the new MME initiates a Create Session Request to the corresponding new SGW, the new SGW initiates a Modify Bearer Request to the PDN GW upon reception of the Create Session Request, the PCRF initiates an IP-CAN session modification procedure, and then the PDN GW returns a Modify Bearer Response to the new SGW, and the new SGW returns a Create Session Response to the new MME. The new MME transmits an Update Location message to the HSS, the HSS transmits a Cancel Location message to the old MME, the old MME returns a Cancel Location ACK to the HSS, and then the HSS returns an Update Location ACK to the new MME. 
     Particularly in the steps  815  and  816 , the new MME transmits the D2D request to the eNB to transmit a D2D feature accepted by the new MME to the eNB, and the eNB determines according to a current use condition of radio resources, interference strength, etc., whether the D2D request of the UE is acceptable, and returns to the new MME a D2D response carrying a result of whether to accept the D2D request of the UE. This will be applicable only to the first implementation of the step  802  but not to the second implementation of the step  802 . 
     In the meanwhile, the old MME transmits a Delete Session Request to the corresponding old SGW and returns a Delete Session Response returned by the old SGW. 
     In the stem  820 , the new MME returns the D2D feature accepted by the new MME to the eNB in an initial UE context creation procedure or in an NAS downlink Direct Transfer message, the eNB allocates or releases resource according to the D2D feature accepted by the new MME and then transmits to the UE a result of admission by the network side, including the D2D feature accepted by the new MME and information about the resource configured or released by the eNB, and the UE activates/deactivates the corresponding D2D feature according to the result of admission by the network side and performs subsequent D2D operations. In this step, the new MME transmits a TAU Accept message to the eNB, and the eNB further forwards it to the UE. 
     In the step  821 , the UE returns an NAS TAU Complete message to the new MME through the eNB. 
     In a fourth particular embodiment, as illustrated in  FIG. 9 , if a connected UE needs to activate/deactivate a D2D feature, then an MME and then an eNB can perform an admission decision in a new NAS procedure or RRC procedure or S1-AP procedure in this particular embodiment particularly as follows: 
     In the step  901 , a UE transmits a request message, which can be an NAS or RRC layer message, to an eNB to activate/deactivate a D2D feature. 
     In the step  902 , the eNB transmits to an MME a request message, which can be an NAS or S1-AP message, to activate/deactivate a D2D feature. 
     In the step  903 , the MME determines D2D features requested by the UE and determines acceptable one of the D2D features requested by the UE according to retrieved subscription data of the UE and a network policy, and if the MME prohibits the D2D request of the UE from an access, then the MME returns a Reject message; otherwise, the MME transmits a D2D Resource Request message to the eNB. 
     In the step  904 , the eNB acknowledges a D2D resource upon reception of the D2D Resource Request message of the MME, judges according to a current use condition of radio resources, interference strength, etc., whether to accept the D2D request of the UE, and returns a result to the MME. 
     In the step  905 , the MME returns to the eNB an ACK message, to activate/deactivate a D2D feature, carrying the D2D feature accepted by the MME. 
     In the step  906 , the eNB returns to the UE an ACK message, to activate/deactivate a D2D feature, carrying the D2D feature accepted by the MME after allocating the resource for the D2D feature accepted by the MME. 
     In a fifth particular embodiment, as illustrated in  FIG. 10 , if a connected UE needs to activate/deactivate a D2D feature, then an eNB and then an MME can perform an admission decision in a new NAS procedure or RRC procedure or S1-AP procedure in this particular embodiment particularly as follows: 
     In the step  1001 , a UE transmits a request message, which can be an NAS or RRC layer message, to an eNB to activate/deactivate a D2D feature. The eNB judges according to a current use condition of radio resources, interference strength, etc., whether to accept the D2D request of the UE, and if it is unacceptable, then the eNB rejects the request of the UE directly. 
     In the step  1002 , the eNB transmits to an MME a request message, which can be an NAS or S1-AP message, to activate/deactivate a D2D feature. 
     In the step  1003 , the MME determines D2D features requested by the UE and determines acceptable one of the D2D features requested by the UE according to retrieved subscription data of the UE and a network policy, and if the MME prohibits the D2D request of the UE from an access, then the MME returns a Reject message; otherwise, the MME returns the D2D feature accepted by the MME to the eNB in an ACK message to activate/deactivate a D2D feature and requests the eNB for a D2D resource. 
     In the step  1004 , the eNB configures (allocates or releases) the corresponding resource upon reception of the ACK message of the MME to activate/deactivate a D2D feature and then transmits to the UE an ACK message, to activate/deactivate a D2D feature, carrying the D2D feature accepted by the MME. 
     In a sixth particular embodiment, if an idle UE needs to activate/deactivate a D2D feature, then the UE can firstly be connected in an existing service request/TAU procedure and then be operatively controlled to activate/deactivate a D2D feature in the new NAS procedure or RRC procedure or S1-AP procedure, described in the fourth particular embodiment or the fifth particular embodiment, in this particular embodiment. 
     Based upon the same inventive idea, an embodiment of the invention further provides a network-side device according to a fourth embodiment as illustrated in  FIG. 11 , and reference can be made to the particular implementation of the MME in the embodiments above for a particular implementation of the network-side device, so a repeated description thereof will be omitted here, and the network-side device generally includes: 
     A receiving component  1101  is configured to receive a D2D request message of a UE transmitted by an eNB; 
     A determining component  1102  is configured to determine requested D2D features according to the D2D request message and to determine acceptable one of the requested D2D features; and 
     A transmitting component  1103  is configured to transmit the accepted D2D feature to the eNB. 
     Particularly the receiving component  1101  and the transmitting component  1103  can be transceiver capable of transmitting and receiving, and the determining component  1102  can be a processor, etc. 
     Particularly the determining component is configured to determine the D2D features requested by the UE according to D2D feature-related information carried in the D2D request message. 
     Particularly the D2D feature-related information includes indication information for indicating the D2D features, the types of services for determining the D2D features, or the D2D features. 
     Particularly the determining component is configured, when the D2D feature-related information is the types of services for determining the D2D features, to determine, according to a preset mapping relationship between the types of services and the D2D features, that the D2D features corresponding to the types of services carried in the D2D request message are the D2D features requested by the UE. 
     Particularly the determining component is configured, when the D2D feature-related information is the indication information for indicating the D2D features, to determine, according to a preset mapping relationship between the indication information and the D2D features, the D2D features corresponding to the indication information carried in the D2D request message are the D2D features requested by the UE. 
     Particularly the determining component is configured to determine a set of D2D features capable of serving the UE according to subscription data of the UE and a network policy; and to determine one of the D2D features requested by the UE, which belongs to the set is the acceptable D2D feature. 
     Particularly the transmitting component is configured to transmit the accepted D2D feature to the eNB by carrying it in an Initial Context Create message; or to transmit the accepted D2D feature to the eNB by carrying it in an S1-AP message. 
     Based upon the same inventive idea, an embodiment of the invention further provides a network-side device according to a fifth embodiment as illustrated in  FIG. 12 , and reference can be made to the particular implementation of the eNB in the second embodiment above for a particular implementation of the network-side device, so a repeated description thereof will be omitted here, and the network-side device generally includes: 
     A communicating component  1201  is configured to receive a D2D request message of a UE, to transmit the D2D request message to an MME and to receive an accepted D2D feature returned by the MME, where the accepted D2D feature is acceptable one of D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message; and 
     A processing component  1202  is configured to judge whether to accept the D2D request of the UE after the communicating component  1201  receives the accepted D2D feature, and if so, to configure resource and instruct the UE to perform configuration of the accepted D2D feature; otherwise, to reject the D2D request of the UE. 
     Particularly the communicating component  1201  can be a transceiver capable of transmitting and receiving, and the processing component  1202  can be a processor, etc. 
     Particularly the processing component is configured to judge according to a current use condition of radio resources and interference strength whether to accept the request of the UE. 
     Particularly the processing component is configured, if the D2D request of the UE is accepted, to allocate resource to be occupied for performing the D2D feature accepted by the MME or to release resource occupied by the accepted D2D feature. 
     Particularly the processing component is configured, if the D2D request of the UE is accepted and after the resource is configured, to instruct the UE to activate/deactivate the accepted D2D feature according to activation/deactivation indication information carried in the D2D request message. 
     Based upon the same inventive idea, an embodiment of the invention further provides a network-side device according to a sixth embodiment as illustrated in  FIG. 13 , and reference can be made to the particular implementation of the eNB in the third embodiment above for a particular implementation of the network-side device, so a repeated description thereof will be omitted here, and the network-side device generally includes: 
     A receiving component  1301  is configured to receive a D2D request message of a UE; and 
     A processing component  1302  is configured to judge whether to accept the D2D request of the UE, and if so, to transmit the D2D request message to an MME, and to configure resource and instruct the UE to perform configuration of an accepted D2D feature returned by the MME upon reception of the accepted D2D feature; otherwise, to reject the D2D request of the UE, where the accepted D2D feature is acceptable one of D2D features requested by the D2D request message, which is determined by the MME according to the D2D request message. 
     Particularly the receiving component  1301  can be a transceiver capable of transmitting and receiving, and the processing component  1302  can be a processor, etc. 
     Particularly the processing component is configured to judge according to a current use condition of radio resources and interference strength whether to accept the D2D request of the UE. 
     Particularly the processing component is configured, when the D2D request of the UE is determined to be accepted and the accepted D2D feature returned by the MME is received, to allocate resource to be occupied for performing the accepted D2D feature or to release resource occupied by the accepted D2D feature. 
     Particularly the processing component is configured, after the resource is configured, to instruct the UE to activate the accepted D2D feature according to activation indication information carried in the D2D request message; or 
     The processing component is configured, after the resource is configured, to instruct the UE to deactivate the accepted D2D feature according to deactivation indication information carried in the D2D request message. 
     Particularly the processing component is configured to receive an Initial Context Create Request message, transmitted by the MME, carrying the accepted D2D feature and to retrieve the accepted D2D feature; or to receive an S1-AP message, transmitted by the MME, carrying the accepted D2D feature and to retrieve the accepted D2D feature. 
     With the technical solutions above, in the embodiments of the invention, the UE transmits a D2D request message to the network side, and the MME determines acceptable one of D2D features requested by the UE and transmits the accepted D2D feature to the eNB, so that the MME controls the UE capable of proximity awareness; and 
     The eNB judges whether the D2D request of the UE is acceptable before or after receiving the D2D feature returned by the MME, and judges according to a result of the judgment whether to reject the D2D request of the UE, and when the D2D request of the UE is acceptable, the eNB configures resource according to the accepted D2D feature returned by the MME and instructs the UE to perform configuration of the accepted D2D feature, so that the eNB controls the UE capable of proximity awareness. 
     In summary a UE capable of proximity awareness can be controlled in a network to which a D2D communication mechanism for a mutual discovery and even direct communication between mobile devices is introduced. 
     Evidently those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus the invention is also intended to encompass these modifications and variations thereto so long as the modifications and variations come into the scope of the claims appended to the invention and their equivalents.

Technology Category: h