Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Nak Woon Sung

Kyung Soo Kim

Sook Jin Lee

Yong Seouk Choi

Namsuk Lee

Hyunsoo Yoon

Seungjae Shin

An operation method of a first communication node in a communication system including an evolved packet core (EPC), a plurality of base stations, and a communication network connecting the EPC and the plurality of base stations may comprise transmitting a first message requesting a packet data network (PDN) connection to a second communication node included in the communication network; receiving a second message including an internet protocol (IP) address-related information from the second communication node; and dynamically assigning IP addresses to the plurality of base stations connected to the first communication node based on the IP address-related information.

Operation method of communication node in communication network

In a mobile communication network, after a target beam is determined based on signal intensity of a serving beam and a candidate beam, when the serving beam and the target beam are operated in the same base station, a terminal performs a beam switching procedure in a layer 2.

Method and apparatus for beam switching in mobile communication network

A multi-FA personal subscriber station and a method of ordering protocol data units thereof is provided. The present invention allows for simultaneously accessing two frequency channels to transmit and receive data and appropriately ordering protocol data units transmitted through each frequency channel, thereby minimizing errors in TCP/IP packet transmission. According to the present invention, two frequency channels are simultaneously accessed to transmit and receive data and protocol data units transmitted through each of the frequency channels are ordered, thereby minimizing errors in TCP/IP packet transmission.

Multi-FA personal subscriber terminal and method of ordering protocol data unit thereof

When a handover apparatus of a user terminal enters a small scale cell within a macrocell area in a state that it is connected to a macrocell, the handover apparatus acquires a delay parameter of the small scale cell and delays handover for a time period of the delay parameter of the small scale cell and determines handover to the small scale cell. Thereby, handover to the small scale cell for a temporal user of the small scale cell can be reduced.

Method and apparatus for handover, and method of determining delay parameter in wireless communication system

The present invention relates to a protocol data unit (PDU) reordering method in a wireless communication system. The terminal maintains the number of bytes of PDUs stored in the buffer for reordering PDUs received in a sequence that is changed due to HARQ error correction to thereby prevent overflow of the reordering buffer. When the HARQ function unit transmits a PDU received at the radio access control RAS (S), the PDU reordering unit of the access terminal sets a current frame number as an arrival frame number of the received PDU (S). When a current frame number is stored as an arrival frame number of a received frame, the PDU reordering unit compares a sequence number (SN) of a received PDU with a sequence number of a PDU that is about to be reordered (S). If the PDU has already been reordered, the received PDU is discarded (S). Else, the PDU reordering unit calculates an average size of a buffer that is required for storing the received PDU by using a moving average calculation equation (S).

Method for PDU reordering in wireless communication system

A method of performing a handover procedure of a handover performing apparatus in a wireless communication system in which a macro base station and a femto base station coexist is provided. The method of performing the handover procedure of the handover performing apparatus includes detecting an uplink signal transmitted from a terminal to the macro base station, sending a report message including information about the uplink signal to the macro base station, and performing the handover procedure with the terminal when the macro base station triggers handover based on the report message.

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Daejeon, South Korea

Nak Woon Sung