Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

Korea Telecommunication Authority

Korea Telecom

Icu Research and Industrial Group

Hong Shik Park

Dong Yong Kwak

Woo Seop Rhee

Man Yeong Jeon

Dan Keun Sung

Yool Kwon

Hong Soon Nam

Han Seung Jang

Young Tae Han

Tae Hwa Kim

Provided is a terminal, for example, user equipment (UE), including a processor and that performs a random access (RA) procedure with a base station, for example, for example, eNodeB, E-UTRAN Node B, or also known as Evolved Node B, and is at least temporarily embodied by the processor. The terminal may be at least temporarily embodied by the processor. The terminal may include a generator configured to generate a preamble sequence using a first sequence corresponding to a first root index based on a preamble index that is randomly selected, and a determiner configured to determine a second root index using the preamble index as an input value of a root index function. Further, the generator may be configured to generate a tag sequence using a second sequence corresponding to the second root index based on a tag index that is randomly selected.

Apparatus and method for communicating through random access

A method and apparatus for deciding a network coding method based on link utilization are disclosed herein. The method may include a step of setting up an output link utilization reference value of a network intermediate node, a step of calculating an average utilization of output links for each network intermediate node, a step of deciding a network coding method in accordance with the average utilization of the output link for each network intermediate node, a step of consistently updating the average utilization of the output link for each network intermediate node, and a step of changing the network coding method, when a value of the average utilization value is changed.

Method and apparatus for deciding network coding method based on link utilization

Provided is a method and apparatus for classifying applications in traffic easily and accurately by utilizing only statistical data of traffic at transport layer. A method of the present invention includes determining candidate applications by comparing at least one of smallest packet size, biggest packet size and average packet size of collected packets for a flow with corresponding reference data of potential applications; and comparing mode set of packet size for the collected packets with corresponding reference data of the candidate applications to identify the flow as an application which has identical elements in the same order, the number of the identical elements being equal to or more than a predetermined number.

Method and apparatus for classifying traffic at transport layer

The invention is to provide an STM-16 Network-Node Interface(NNI) which is capable of exactly checking whether a fault is generated on any station when the VC-4 AU received from a remotely located station has the fault, by checking the incoming data streams and communication with the remote node using the still unused values of APS bytes, thereby further enhancing the reliability thereof, which comprising duplicate physical layer processing blocks for processing a physical layer to provide a plurality of simplex ATM layers, and an ATM layer controller for controlling the processing condition of each of the ATM layers processed by the ATM layer processing means, to thereby processed information to the microprocessor; and ATM layer processing block for processing the ATM layers to a plurality of ATM cells.

STM-16 network-node interface in an ATM switch and the fault diagnosing

Disclosed is an adaptive connection admission control method by traffic measurement and estimation, which includes the steps of determining whether a connection is to be accepted or not by using the peak cell rate among the user-declared traffic parameters and the estimation value of the average cell rate of individual connections under service as inputs when a connection set-up request signal is inputted into the system, the step of reducing the number of connections when a connection release request signal is inputted, and the step of calculating the measured value of the average cell rate of all the connections passing through an output link and the estimated value of the average cell rate of individual connections when the measuring interval has ended, to thereby accomplish accurate and smooth connection controls.

Adaptive connection admission control method using traffic measurement

The present invention relates to a method for controlling the peak cell rate spacing of multiplexed ATM traffic. The method includes the steps of: (a) examining whether a cell has arrived for each time slot; (b) if arrived, saving the cell in a node specified by a free list header, linking the node to an event scheduler or a temporary queue according to the number of cells that have arrived and departed, linking nodes which are linked to a present cell time slot location of the event scheduler to an output list, transferring the cell in the first node linked to output list header to the output list, and linking the node which was used by the just-departed cell to free list, and if the number cells that have arrived and departed including the just-departed cell are different, linking the first node of the temporary queue to an appropriate location of the event scheduler; and (c) if not arrived, linking nodes which are linked to a present cell time slot location of the event scheduler to the output list, transferring the cell in the first node linked to output list header to the output list, and linking the node which was used by the just-departed cell to the free list, and if the number of cells that have arrived and departed including the just-departed cell are different, linking the first node of the temporary queue to an appropriate location of the event scheduler.

Method of controlling the peak cell rate spacing of multiplexed ATM

A congestion control unit and method in an ATM network is disclosed. The congestion control unit includes a congestion detector, a congestion controller and a routing controller. The congestion detector receives the measured number of cells generated from an output link through an ATM switch module, transmits the measured number of cells to an adaptive connection admission control unit, and detects the state of the output link by use of a utilization of a cell transmission link. The congestion controller receives congestion state information from the congestion detector and receives a cell loss ratio through the ATM switch module. The congestion controller transmits a backward resource management cell to a user or generates a routing control request signal so as to assign the load of the input traffic to another affordable link, and supplies a monitor parameter to the ATM switch module. The routing controller receives the routing control request signal from the congestion controller, and supplies routing information on an affordable link of the same destination to the ATM switch module.

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Daejeon, South Korea

Hong Shik Park