Samsung Electronics Co., Ltd.

Jae-Hong Chon

Tae-Ho Kim

Yong Chang

Yu-Chul Kim

Nae-Hyun Lim

Jeong-Woo Cho

A method and apparatus are provided for managing session information of an access terminal (AT) that has moved from a source subnet to a target subnet in a mobile communication system for high-speed data transmission. The AT transmits a message with a prior universal access terminal identifier (UATI) to a target access network (AN) to perform session negotiation with the target AN of the target subnet. The target AN transmits a message with the prior UATI to a target packet control function (PCF) to request retrieval of session information of the AT. The target PCF sends a request for transmission of prior session information for the AT to a source PCF of the source subnet, found using the prior UATI. The target PCF receives the prior session information from the source PCF and retrieves the session information of the AT using the received prior session information.

Method and system for managing session information in a mobile communication system and apparatus therefor

An apparatus and method for optimizing a data rate in a wireless communication system supporting Hybrid Automatic Repeat reQuest (HARQ) are provided. The method includes estimating Channel State Information (CSI) of a signal to be transmitted, by using other CSIs received in a previous cycle; determining an instantaneous data rate, at which the CSI is transmitted with an optimal data rate, and the amount of redundancy information to be retransmitted; and retransmitting the redundancy information of the signal according to the amount of redundancy information and the instantaneous data rate, if a receiving end requests signal retransmission. Accordingly, the packet can be transmitted with the optimal data rate.

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Soongnam-si, South Korea

Jae-Hong Chon