Method for selecting and establishing a D2D communication path in MTC capillary networks

A method for selecting and establishing a device-to-device (D2D) communication path in Machine-Type Communication (MTC) capillary network, executed on an MTC gateway, comprising:

• receiving a probe/beacon signal piggybacked with paging request from an MTC device;
• determining D2D link quality and reporting result to an eNB and sending a probe/beacon without paging response to said MTC device, when said MTC device being authorized to use said MTC gateway;
• and
• when receiving a response from said eNB:
• sending a response to said MTC device to reject said probe/beacon signal with paging request, when the received response indicating not to use D2D communication, or, sending a response to said MTC device to accept said probe/beacon signal with paging request, when the received response indicating to use D2D communication.

A method for selecting and establishing device-to-device (D2D) communication path in Machine-Type Communication (MTC) capillary network, said MTC capillary network having a plurality of MTC devices and an MTC gateway, comprising:

• receiving a paging request by said MTC device;
• piggybacking a paging request into a probe/beacon signal and sending said probe/beacon signal piggybacked with said paging request to said MTC gateway when said MTC device determining being configured to use an MTC gateway, and waiting until receiving a response from said MTC gateway;
• receiving a probe/beacon signal piggybacked with paging request from said MTC device by said MTC gateway;
• determining D2D a link quality and reporting result to an eNB and sending a probe/beacon without paging response to said MTC device when said MTC gateway determining said MTC device being authorized to use said MTC gateway;
• when said MTC gateway receiving a response from said eNB, said MTC gateway:
• sending a response to said MTC device to reject said probe/beacon signal with paging request when the received response from said eNB indicating not to use a D2D communication, or, sending a response to said MTC device to accept said probe/beacon signal with paging request when the received response indicating to use a D2D communication;
• when said MTC device receiving a response from said MTC gateway, said MTC device:
• proceeding to determine a D2D link quality and reporting result to an eNB connected to said MTC gateway when said received response from said MTC gateway being a probe/beacon signal without paging response, and returning to waiting until receiving a response from said MTC gateway;
• and
• setting up a D2D communication link when said received response from said MTC gateway indicating that said probe/beacon signal with paging request being accepted, or, setting up a direct cellular connection, when said received response from said MTC gateway indicating said probe/beacon signal with paging request being rejected.