Hitachi, Ltd.

Yi Lou

Takaaki Suzuki

Hideo Aoe

Michihiro Asanuma

Masao Hayama

Eiichiro Takizawa

Call connection processing is performed and a message is processed in a different subnet without UATI reassignment and takeover of a wireless session. RANs that belong to different subnets and are adjacent to each other use messages to exchange ColorCode, IP addresses of base station controllers, wireless resource information of base station transceiver subsystems and the like. When the RAN receives, from an AT, a message having ColorCode that is different from ColorCode of the RAN, the RAN transfers the message to a base station controller included in the RAN having ColorCode that matches the ColorCode included in the message.

Base station controller and wireless packet processing device

To improve efficiency of a radio section while reducing a no-communication period in the case of handoff in communication used DRC and DSC signals. A communication connection apparatus (BS)provided in a communication system accumulates data transmitted from the communication control apparatus (BSC). In a state in which a DSC signal from a communication terminal (AT)designates an owed BS, when a DRC indication from the ATis switched from another BS to the owned BS, the BStransmits data received from the BSClast to the ATout of the data accumulated in the BS. Consequently, missing data is requested from the BSat a handoff destination in accordance with a retransmission request function existing in the AT. Moreover, retransmission processing for data by a retransmission request message is performed in the BS

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Yokohama, Japan

Yi Lou