US 6,636,492 B1Granted

Apparatus for interfacing between mobile switching center and interworking function unit

AssigneeHundai Electronic Ind. Co., Ltd.

InventorsMyeong Uk Son, Sang Ho Park

Life of this patent

Estimating the term…

Loading patent…

Abstract

An apparatus for interfacing between a mobile switching center (MSC) and an inter working function unit (IWF), comprising an inter-system link protocol (ISLP) processing part for processing a plurality of subhighway (SHW) data inputted respectively through SHWs in the unit of subscribers according to an ISLP. The ISLP processing part further separates data transferred over a given channel of an E1 trunk from the IWF according to the SHWs and their time slots and transfers the separated data respectively to the subscribers. A dual port random access memory (RAM) stores the subscriber-unit data processed by the ISLP processing part in the unit of channels or the data transferred over the given E1 trunk channel from the IWF in the unit of the subscribers. A frame relay protocol processing part extracts only a plurality of actual subscriber data from the channel-unit data stored in the dual port RAM, processes the extracted actual subscriber data according to a frame relay protocol, assigns the processed actual subscriber data to a specific channel of the E1 trunk and transfers them to the IWF. The frame relay protocol processing part further extracts respective subscriber data from the data transferred over the given E1 trunk channel from the IWF and stores the extracted subscriber data in the dual port RAM in the unit of the subscribers.

Claims11

Dependent claims

An apparatus for interfacing between a mobile switching center and an inter working function unit, comprising:

inter-system link protocol processing means for:
a) processing a plurality of subhighway data inputted respectively through subhighways in the unit of subscribers according to an inter-system link protocol;
and
b) separating data transferred over a given channel of an E1 trunk from said inter working function unit according to said subhighways and their time slots and transferring the separated data respectively to the subscribers;
storage means for storing the subscriber-unit data processed by said inter-system link protocol processing means in the unit of channels or said data transferred over said given E1 trunk channel from said inter working function unit in the unit of the subscribers;
and
frame relay protocol processing means for:
a) extracting only a plurality of actual subscriber data from said channel-unit data stored in said storage means, processing the extracted actual subscriber data according to a frame relay protocol, assigning the processed actual subscriber data to a specific channel of said E1 trunk and transferring them to said inter working function unit;
and
b) extracting respective subscriber data from said data transferred over said given E1 trunk channel from said inter working function unit and storing the extracted subscriber data in said storage means in the unit of the subscribers.

7 more elements

Dependencies are inferred from the claim text.