| Posco Research Association Patent applications |
| Patent application number | Title | Published |
|---|
| 20090279505 | SERVICE ZONE SWITCHING METHOD BASED ON LOAD CONSIDERING INTER-CELL INTERFERENCE IN 802.16/WIBRO SYSTEMS - There is provided a method of switching a zone through which services are provided to subscriber stations (SS) in an environment using an FRF-1 zone and an FRF-3 zone based on traffic load of each zone in order to reduce the inter-cell interference in 802.16/WiBro systems. The service zone switching method based on load considering inter-cell interference in 802.16/WiBro systems may be useful to minimize the inter-cell interference, enhance the capacity of cells and improve users' transmission quality in the cells by determining whether the services are provided through one out of an FRF-1 zone (a zone where users in 3 sectors of one cell can use all subchannels) and an FRF-3 zone (a zone where users in each of 3 sectors of one cell can use one third of all subchannels; 3 sectors of one cell use 3 channel group, respectively), which are present in one frame, based on the distribution and traffic load of subscriber stations (SS) present in one cell, which consists of 3 sector units, under the environment of the 802.16/WiBro systems, and providing services through the selected zone. | 11-12-2009 |
| 20090063692 | BIDIRECTIONAL FLOW SERVICE SUPPORT METHOD IN IEEE 802.16/WIBRO SYSTEM - Provided is a bidirectional service flow management method in a wideband wireless connection communication system, and more particularly, a method of performing a bidirectional flow establishment. The method of providing a flow service in an IEEE 802.16/WiBro includes: generating a revised dynamic service addition (DSA) related message in which an area for designating bidirectional flow management information is allocated from a standard DSA related message; and performing a bidirectional flow initialization process between a subscriber station (SS) and a base station (BS) via single control message negotiation based on the revised DSA related message. | 03-05-2009 |
| 20090059889 | rtPS CLASS OF IEEE 802.16/WiBro SYSTEM - Provided is a real-time polling service (rtPS) class of an IEEE 802.16/WiBro system. An rtPS scheduling method of the IEEE 802.16/WiBro system includes subscriber station (SS) located in a network where the IEEE 802.16/WiBro system is realized inserting a timestamp indicating time information when uplink data is transmitted from an application layer of the SS into the uplink data; and after the SS receives polling from a base station (BS), comparing the timestamp inserted into the uplink data and a current time, and, if a difference between the timestamp and the current time is greater than a predetermined period of time, firstly dropping the uplink data. | 03-05-2009 |
| 20090059847 | UNSOLICITED GRANT SERVICE CLASS OF IEEE 802.16/WiBro SYSTEM - Provided is a traffic class of an IEEE 802.16/WiBro system. The unsolicited grant service (UGS) scheduling method with regard to a subscriber station (SS) and a base station (BS) that are disposed in a network wherein an IEEE 802.16/WiBro system is realized, the method includes: when the SS requires 1 through M (where M is a positive integer) UGS flows, and the BS serves 1 through N (where N is a positive integer) frames, the BS storing grant periods and guaranteed sizes that are granted to the M UGS flows in each N frame; and the BS comparing service capacity of a frame and a sum of guaranteed sizes of each flow belonging to the N frames, and determining if an overload occurs. | 03-05-2009 |
| 20090034464 | RESOURCE MANAGEMENT METHOD IN WIRELESS COMMUNICATION SYSTEM - Provided is a resource management method in a communication system, and more particularly, a resource management method based on priority in a wireless communication system. The resource management method in a wireless management network includes: setting a priority factor value with regard to a link flow for which link establishment is requested; and if a capacity required by the flow for which link establishment is requested exceeds a remaining capacity of a base station, increasing the remaining capacity of the base station by sequentially reducing a minimum reserved rate (MRR) value of flows that receive a service at a lower priority than the flow for which link establishment is requested to a maximum sustained rate (MSR) value, until the remaining capacity required by the flow for which link establishment is requested is generated. | 02-05-2009 |
