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areas for Research & Development
Development of IMT-Advanced WiBro System
IMT-Advanced WiBro system research and development are being proceeded in order to develop the wireless access standard aiming for ITU-R IMT-advanced system as well as to enhance wireless system performance. Also, the goal of the R/D, based on the WiBro technology, is to establish the technology of the open mobile platform and the technology to provide subscribers under the stationary or mobile environment with high data rate and high quality wireless internet service. Furthermore, it aims to be able to reconfigure the system depending on the requirements from the industry field, e.g., providing IMT-Advanced WiBro Component such as Macro/Pico/Femto/Relay as a form of PNP (Plug and Play).
The main topics of this project are as follows.
- Development of open multi-platform structure for Macro/Pico/Femto/Relay system
- Development of open multi-platform model according to system/device/interface functions
- Development of prototype system based on IEEE802.16m
- Development of spectral efficiency maximizing techniques
- Development of wireless access techniques supporting to variable transmission rate with maximum of 600Mbps and mobility with high speed of 350Km/h
- Development of inter-cell interference cancelling and mitigating techniques
- Development of collaborative, CL/OL, MU/SU-MIMO techniques
- Development of wireless packet scheduling technique
- Development of resource control techniques
- Development of hand-over techniques
Development of WiBro Reliability Securement Technology and WiBro-based Location Recognition Technology
ETRI is pushing ahead with the development of the technology to secure the WiBro network reliability and to protect the network from various attacks and security intrusions and also with the development of technology to detect the location of a mobile terminal based on satellites for navigation and WiBro networks. Especially with respect to positioning technology, ETRI is developing several hybrid positioning technologies to pre-obtain high-accuracy near the performance requirements suggested by FCC E911.
The main development contents of WiBro reliability securement technology are as follows :
- WiBro Security Operation Technology
- Operation Standard Technology (Activity for standardization)
- Operation Standard Technology based on FMC Network
- Operation Standard Technology for P2P Application
- Efficient Packet Inspection Technology
The main development contents of WiBro-based location recognition technology are as follows :
- Location Detection Technology based on WiBro Networks and Satellites for Navigation
- Location Detection Technology based on WiBro Infrastructures
- Seamless Indoor/Outdoor Location Detection Technology
- Technology of overcoming the problems of wireless channel on the repeater
- Technology for enhancing the positioning performance based on DSOA(Delay Spread of Arrival) scheme
Development of Mobile Convergence Components and Production-Infra Construction
With respect to this project, we are developing the components of time synchronization for WiBro repeaters based on OFDM TDD scheme applied to IMT-advanced systems and for Femto-cell(base station) with the satellite signal acquisition algorithm available in indoor environments.
The main development contents of this field are as follows.
- High-fast initial synchronization acquisition technology based on TDD scheme
- Minimization technology of the probability of mis-detection and false-alarm for synchronization acquisition based on TDD scheme
- High-sensitivity GPS signal processing technology
- Low-power synchronous component design technology
- Component library design technology for commercialization
Development of 4G Mobile Telecommunication Standards
The study and standard development of IMT-Advanced called the 4th generation mobile communication system have been ongoing in active standard bodies including ITU-R WP5D, 3GPP LTE/SAE, and IEEE 802.16m. The main goal of this project is to obtain the core technologies through the standardization activity on IEEE 802.16m in process of developing domestic and international standards satisfying the IMT-Advanced requirements.
We plan to lead IEEE 802.16m task group to reflect/accept our core technologies, which we already developed in our previous work such as enhanced mobile access control scheme, enhanced wireless data transmission scheme, and so on. Another plan is new standard International Property Rights (IPR) development for the emerging technologies such as Femto-cell, self-organization, and Multicast & Broadcast Service.
Additionally, we will strengthen our capability for domestic standardization; reinforce our influence on the international standard bodies with international cooperation; and support performance evaluations of international standard systems (i.e., performance evaluation in TTA PG707).
Research and Development of Radio Interface Technology on WiBro-based Next Generation Nationwide Mobile Command & Control Network for Public Safety
We are working on the development of radio Interface Technology on WiBro-based Next generation Nationwide Mobile Command and control Network for handling different communication needs and carrying out mission-critical tasks.
The main goal of this project is to obtain the core technologies based on WiBro Infrastructure, which are applied to a public service and disaster relief. Another plan is to push ahead with the standardization activity on the IEEE 802.16 GRIDMAN (tentatively named).
Additionally, this project is expected prior occupation of the market/technology on Nationwide mobile command and control Network and expending the WiBro technology.
The following figure shows the goal and concept of this technology:
The following are the major research topics:
Direct Mode Communication
- To provide the ability for radio terminals to communicate directly with each independent of the network infrastructure and to provide communications within coverage at times of capacity limitations or whenever connection with the infrastructure is impossible.
Dynamic Group Communication
- To support the PTT (Push-To-Talk) of user group to control and command for handling mission-critical communication needs
Dynamic and self-organization
- To provide the automatic installation procedures to get the necessary basic configuration for system operation and to minimize human intervention during disaster situations
Development of Next Generation Tactical Information Communication Network Technology
The battlefield of a network centric warfare (NCW) environment is a form which is dynamically changed in space-time according to a rapid military operation. To operate the battlefield efficiently, an adaptive mesh network which has the ability of supporting On-The-Move (OTM), unlike the fixed infrastructure based on a typical cellular network, is essential.
This is a hierarchical structure between the basesation backbone mesh system and the client mesh system, which are respectively developed according to each system's requirements. By the development of the migrated tactical mesh system, the access of the tactical information system is possible without communication infra. Thus the adaptability and the stability of command and control information is obtained wherever the OTM battlefield exists.
The followings are the major research topics for the migrated tactical mesh system:
- Migrated tactical mesh standard for the basestation backbone system
- Migrated tactical mesh standard for the client system
- Combined M&S
- Node platform
- Network composition and management
Development of a WiBro Wireless Communication Device for Dog-Horse Robot
We develop a multipurpose dog-horse robot for both the industry and the military, which is used for the transportation of a heavy burden in open fields and a rough road, the observation/reconnaissance, the support of the disabled or the old and the infirm, and so on. In particular, a remote control and a WiBro wireless communication system are developed for remote command and control of multiple dog-horse robots using wireless communication network. An unmanned military operation and guard for military units and facilities is performed as the intelligent cooperation and observance is possible based on wireless communication network. It leads to a significant increase in the efficiency of military tasks. Furthermore, a human life is also saved.
The followings are the major research topics:
- Adaptively variable modem for channel environments and channel coding technology
- Technology to minimize communication delay for real-time control of a robot
- Optimizing protocol for the operation of a WiBro communication system
- Technology for service coverage extension
- Flexible media allocation control of multiple robots
Development of Smart Radio Technology
It is expected that future wireless services will be provided through various radio access networks in the IP-based convergence network. In this scenario, users will receive their services by finding optimal wireless access autonomously.
In this project, universal access technique is studied, which can provide the optimal wireless access that "best" suits the user's connectivity to applications, where "best" depends on a number of different aspects such as personal preferences, capabilities of the devices, application requirements, operator policies, available network resources, their coverage, security, and so on.esigital RF techniques are also studied to provide reconfigurable platforms to smart radio for supporting universal access functionality.
The main topics of this project are as follows.
- Research on dIgital RF techniques
- Bandpass sampling for simultaneous reception of RF signals via digital signal processing
- Structure for multi-band multi-mode transmission
- Spectrum aggregation based on digital RF techniques
- Research on universal access control
- Universal access for optimal RAT and channel selection
- Joint radio resource management for an improvement of system performance and spectral efficiency
- Development of a research platform for Smart Radio
