Electronics and Telecommunications Research Institute

Hyun Gu Hwang

Hee Sang Chung

Gi Yoon Park

Dae Ho Kim

Hyeong Jun Park

An operation method of a first communication node in a wireless distributed communication system may comprise: providing a group code and a primary secret key to a third communication node via a second communication node; receiving, from the third communication node, a first packet including a first group trust field through wireless distributed communication, the first group trust field being generated using the group code and the primary secret key; and performing a trustworthiness check of the received first packet by using the first group trust field included in the received first packet, the group code, and the primary secret key.

Method and apparatus for guaranteeing trust of packet in distributed communication system

An operation method of a station in a wireless distributed communication system may comprise: determining a probability distribution for selecting a first value in each subslot of a slot of a channel used for performing contention; selecting the first value based on the probability distribution in a subslot k among predetermined subslots, wherein k is 0 or a positive integer; transmitting a tone signal in the subslot k when the first value is selected in the subslot k; and winning the contention by selecting the first value in remaining subslots after the subslot k.

Method and apparatus for resource allocation contention in distributed communication system

A channel resource management method performed by a first communication node in a communication system may comprise: monitoring channel information broadcast packets transmitted from other communication nodes; receiving a first broadcast packet, which is a channel information broadcast packet transmitted from a third communication node that is included in the other communication nodes and performs one-to-one communication with a second communication node included in the other communication nodes; and managing a one-to-one channel resource for one-to-one communication with a fourth communication node included in the other communication nodes based on information included in the first broadcast packet, wherein the first broadcast packet includes information on a first one-to-one channel resource allocated for one-to-one communication between the second and third communication nodes.

Method and apparatus for channel resource management in wireless communication system

A method of checking the integrity of a wireless distributed communication packet using a trust field in a wireless distributed communication system may comprise: allowing a first terminal to acquire a trust-field-generation-specific secret key of a second terminal; allowing the second terminal to generate a trust field utilizing all bits to be transmitted to the first terminal; allowing the second terminal to generate a first packet using the trust field and all the bits to be transmitted; allowing the second terminal to transmit the first packet to the first terminal; and allowing the first terminal to check the integrity of the first packet using the trust-field-generation-specific secret key and the trust field included in the first packet.

Method and device of checking integrity of packet using trust field in wireless distributed communication systems

An operation method of a first distributed terminal, in a synchronized wireless distributed communication system which has a plurality of communication resources configured with a plurality of channels having different center frequencies and includes the first distributed terminal and a second distributed terminal, may comprise receiving slots mapped to the communication resources in a resource allocation channel having a center frequency independent from the plurality of channels; measuring communication environments of the communication resources by using a mapping relationship between the received slots of the resource allocation channel and the communication resources; selecting a first communication resource to be allocated using the measured communication environments of the communication resources; allocating the selected first communication resource; and continuously occupying the allocated first communication resource.

Communication resource allocation method in synchronized wireless distributed communication system, and apparatus therefor

An operation method of a first terminal in a wireless distributed communication system using a synchronous TDMA scheme may comprise configuring a position of a first sub-slot in a frame of an information tone channel; detecting, by the first terminal in a sleep state, a first information tone signal transmitted from a second terminal in the first sub-slot; maintaining a state of the first terminal to the sleep state when the first information tone signal is not detected in the first sub-slot, and transitioning the state of the first terminal to a wake-up state when the first information tone signal is detected in the first sub-slot; and transmitting and receiving, by the first terminal having transitioned to the wake-up state, a data signal to and from the second terminal through a preconfigured data channel.

Method and apparatus for receiving tone signal in synchronous wireless distributed communication system

The present invention relates to a method of avoiding collision in a. More specifically, the present invention relates to a method of effectively avoiding collision when resources are allocated to and used by substantial mobile terminals in a synchronous wireless distribution communication system. The method of avoiding collision includes: determining, by a terminal, a slot to be transmitted in a main frequency channel; in a slot prior to the determined slot, performing contention using a contention deputy channel having a different frequency from the main frequency channel; and using the selected slot of the main frequency channel when winning the contention.

Method for avoiding collision in synchronous wireless communication system

Provided are a method and an apparatus for processing a transmission signal, which reduce a peak value to an appropriate magnitude by appropriately distorting a final transmission signal through implementation into simple hardware having a small memory and a small operation amount to effectively reduce a peak-to-average power ratio (PAPR) by effectively processing a signal for wireless communication in real time.

Method and apparatus for processing transmission signal for PAPR reduction in time region

Disclosed is an uplink synchronization method of a base station according to the present invention includes receiving an initial access signal from a terminal; obtaining an uplink synchronization using the received initial access signal; informing the terminal about obtainment of the uplink synchronization; and receiving a data signal from the terminal. According to the present invention, a marine wireless communication system may efficiently perform uplink synchronization between the base station and the terminal, and may efficiently operate wireless resources.

Uplink synchronization method between terminal and base station

Provided is an auto gain control method in a digital communication system. The auto gain control method checks a distribution of a signal and a distribution of a signal envelope during a regular check interval, and determines a state of a current gain value from the distribution of the signal and the distribution of the signal envelope which are obtained through the checking of the distribution. The auto gain control method controls a gain value for auto gain control according to the determined state of the current gain value.

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Daejeon, South Korea

Hyun Gu Hwang