Abstract:
A method of performing pairing by a transmission terminal in device to device communication is provided. The method includes classifying a plurality of link identifications for identifying a data transmission and reception channel a seed of at least one link identification; selecting an available candidate link identification seed among the seed of the at least one link identification, transmitting a pairing request message including seed information associated with the selected available candidate link identification seed, and receiving a pairing response message corresponding to the pairing request message. When allocating a connection ID in a device to device communication environment, even if a small number of devices exist, an overhead for searching for the connection ID is not great. Further, when many devices exist within a specific range, a probability of devices having the same connection ID is reduced. Accordingly, the device to device communication can be easily performed.
Abstract:
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. A security problem in which information of a monitoring device is provided to another PLMN exists in the procedure for connecting ProSe Functions of two PLMNs and transmitting and receiving information therebetween, and thus, configuration of a D2D discovery service between different providers (inter PLMN) is difficult in reality, despite being defined in the standard. Therefore, the present invention provides a method of using a content server with an existing D2D discovery method in order to advertise, through D2D discovery, real-time local area advertisements to device of a plurality of providers. A monitoring device requests advertisement information directly from a content server, or requests advertisement information from a different PLMN ProSe Function, and thereby the other PLMN ProSe Function may request advertisement information from a content server.
Abstract:
The present invention relates to a method and an apparatus for switching a data path in a wireless communication system supporting device-to-device (D2D) communication. The method for switching a path of a base station in a wireless communication system supporting device-to-device communication, according to the present invention, comprises the steps of: receiving, from a first terminal, a measurement report including a D2D identifier of a second terminal that performs a direct communication with the first terminal; sending a query to a D2D server for a network identifier corresponding to the D2D identifier of the second terminal; and determining whether to switch a direct path between the first terminal and the second terminal to a local path on the basis of the network identifier of the second terminal obtained from the D2D server.
Abstract:
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. A security problem in which information of a monitoring device is provided to another PLMN exists in the procedure for connecting ProSe Functions of two PLMNs and transmitting and receiving information therebetween, and thus, configuration of a D2D discovery service between different providers (inter PLMN) is difficult in reality, despite being defined in the standard. Therefore, the present invention provides a method of using a content server with an existing D2D discovery method in order to advertise, through D2D discovery, real-time local area advertisements to device of a plurality of providers. A monitoring device requests advertisement information directly from a content server, or requests advertisement information from a different PLMN ProSe Function, and thereby the other PLMN ProSe Function may request advertisement information from a content server.
Abstract:
The present invention relates to a method for performing a D2D discovery and a terminal using the same. Particularly, the present invention relates to a method for performing a D2D discovery, which compares a congestion level of another discovery slot selected randomly or according to a preset pattern with a threshold or a congestion level of a current discovery slot and determines a discovery slot to transmit a discovery message and a transmission period of the discovery message according to a result of the comparison, and a terminal using the same. The present invention relates to a method for performing a D2D discovery using discovery resources including a plurality of discovery slots, and a terminal performing the same, the method comprising the steps of: broadcasting a discovery message by using a first discovery slot; comparing a congestion level of a selected second discovery slot with a predetermined congestion level value; determining a discovery slot to broadcast the discovery message on the basis of a result of the comparison; and broadcasting the discovery message by using the determined discovery slot.
Abstract:
A scheduling method and apparatus using a non-orthogonal Connection IDentifier (CID) for use in a device-to-device communication system is provided. The scheduling method includes generating a non-orthogonal CID for communication with a counterpart terminal, determining slot indices for communication using the non-orthogonal CID, and communicating with the counterpart terminal through the slots indicated by the slot indices. The non-orthogonal CID-based scheduling method and apparatus is capable of selecting the slots for use in the non-orthogonal CID-based scheduling according to a rule so as to overcome CID collision in the system of using the non-orthogonal CID.
Abstract:
A method for supporting a device to device (D2D) communication in a base station of a mobile communication system according to one embodiment of the present specification comprises the steps of: determining one or more device groups including one or more devices among a plurality of devices; determining radio resources for measuring channels for the determined device groups; and transmitting, to the devices included in the respective groups, information on the radio resources for measuring the channels corresponding to the groups. According to the embodiment of the present specification, complexity of measuring a channel state in the D2D communication is reduced, and many more devices can measure the channel state using limited radio resources and can transmit and receive data. The present disclosure relates to re-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE).
Abstract:
A fifth generation (5G) or a pre-5G communication system provided to support a higher data transmission rate than a system after a fourth generation (4G) communication system, such as long-term evolution (LTE) is provided. An apparatus of a user equipment (UE) using device-to-device (D2D) communication is provided. The apparatus includes at least one processor, and at least one transceiver configured to be operatively coupled to the at least one processor, wherein the at least one processor is configured to receive a response message from each of a plurality of UEs in response to a request message transmitted from the UE, identify at least one UE for a dynamic group from among the plurality of UEs based on the response message, generate an identifier (ID) for the dynamic group based on an ID of the UE, and transmit, to the at least one UE, a group create message including the ID for the dynamic group.
Abstract:
A terminal synchronization method and apparatus for use in a wireless communication system are provided. A synchronization method includes configuring, at the terminal, a synchronization signal reference time depending on whether a synchronization signal is received in an initial observation period as long as at least two frames, monitoring to receive the synchronization signal in an alternation period of a transmission period and a reception period, the alternation period following the initial observation period, updating the reference time depending on whether the synchronization signal is received in the reception period, transmitting the synchronization signal at the updated reference time in the transmission period, and updating the reference time depending on whether the synchronization signal is received in a dedicated observation period following the alternation period. The synchronization apparatus and method are advantageous in that synchronization is obtained without assistance of a base station, an Access Point (AP), etc.
Abstract:
A terminal and a distance estimation method thereof for use in a wireless communication system supporting device-to-device (D2D) communication are provided. The terminal includes a transceiver configured to communicate with other terminals and at least one processor configured to control the transceiver to transmit a discovery message including time information to the other terminals and receive distance information calculated by the other terminals, the distance information being calculated based on the time information. The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system, such as Long Term Evolution (LTE).