Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Kt Corporation

Sk Telecom Company, Ltd.

Dong-jin Shin

Young-Jick Bahg

Moon-Soo Jang

Don-Sung Oh

Hyeong-Jun Park

Ji-Soo Park

Yeong-Jin Kim

Cheol-Hye Cho

Chang-Ki Kim

Han-Jun Yoon

Youn-Kwae Jeong

Young-Dae Lee

Jae-Hwan Hong

A wireless access router for separately controlling a traffic signal and a control signal is provided. In a mobile communication access network structure, in order to optimally support a mobile communication terminal, a control signal and a traffic signal of a base station are divided, and a router is controlled by mobile communication system functions such as a mobility management function, a QoS management function, a session control of the terminal, a mobility control, and a QoS control function that are effectively processed. With a wireless access router having the divided control signal and traffic signal, it is expected the traffic concentration and a packet transmission delay can be prevented.

Mobile wireless access router for separately controlling traffic signal and control signal

A method for scheduling packets from a plurality of radio bearers by a scheduler of a first layer includes calculating a virtual scheduling time for the radio bearers by using a packet delay variation of the radio bearers, and transmitting the packet of the radio bearer having the greatest virtual scheduling time from among the plurality of radio bearers to a second layer.

Packet scheduler and packet scheduling method

The invention once stores PCM data to a memory and after a predetermined time is elapsed, reading in again and making to output whereby makes to delay the PCM data. The invention comprises a memory for once storing a PCM data converted to parallel, a delay time setting circuit for setting a delay time of PCM data, and a comparator and control circuit for comparing a setting value from the delay time setting circuit and a high order 10 bits writing address of the memory and thereby providing an address and control signal for either initiating a high order 10 bits reading address of the memory or else for writing or reading to the memory.

Delay circuit of PCM data

A base station controller interface of the code division multiple access (CDMA) mobile system is described for interfacing between the base station controller and the CDMA mobile switching center (MSC) of the CDMA mobile system (CMS). The base station controller decreases the load of the system by including, for every base station controller interface, the mobile announcement (MANM) to service the state information of the subscriber of interest for all paging to the mobile subscriber. At the same time, the connection between the base station controller and the base station controller interface of the mobile switching center utilizes the EL 2048 Kbps interfacing technique applying the conventional communication network recommended in the ITU-T. The transmission of the message and the call traffic using the interfacing technique is performed to be linked with the TSB of the base station controller. The control signal for processing the call is accomplished by using the inner communication message protocol which is connected in the EIA-422 interfacing mode to the call control processor of the base station controller. Therefore, the present invention effectively performs the call processing function to the mobile subscriber, the mobility management function, the mobile subscriber announceable function, and the itself operational preservative function. Also, the present invention transmits between the call processing control information and the call traffic. Therefore, the present invention increases the capacity of the subsystem in the conventional full electronic telephone exchanger, and has a effect to easily embody the subsystem in the mobile switching center for more economical connection thereof.

Apparatus for interfacing mobile switching center(MSC) with base station

The invention is a method for controlling an echo canceller circuit including a data storage for storing a program for processing digital signals to cancel an echo in PCM encoded voice data, a plurality of digital signal processors each having a reset terminal and which are downloaded with the program which is executed by the plurality of digital signal processor to carry out removal of the echo in the PCM encoded voice data, and a one chip controller for performing control functions of the echo canceller. The method comprises the steps after completion of initialization of the one chip controller, controlling the reset terminals of the digital signal processors to maintain all of the digital signal processors in reset state; releasing one digital signal processor from the reset state and downloading the program to the one released digital signal processor from the data storage; and the released one digital signal processor processing the PCM encoded voice data with the program to remove the echo from the PCM encoded voice data.

Method for controlling echo canceller circuit

Growing community of inventors

Daejeon, South Korea

Dong-jin Shin