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专利名称：Mobile wireless communications system发明人：Deborah Pinard申请号：US08/021862申请日：19930224公开号：US05423065A公开日：19950606
摘要：A mobile wireless communications system, comprises a plurality of base
stations with associated respective coverage zones, each base station being connected toa central host computer and being capable of establishing two-way communication withmobile units in its associated coverage zone and a switch having a plurality of lineinterfaces connected to the base station. The host computer can select one of the basestations in range of an active mobile unit to establish a call therewith, determine the lineinterface associated with the call, determine when a hand off from one base station tothe next is to occur as the active mobile unit moves between coverage zones, send a handoff message to the switch identifying the current active line interface and the target lineinterface after hand off associated with the call, and initiate a hand off by sending a calloriginate message to the next base station instructing it to originate the call on thetarget line interface. The switch comprises a first memory for storing call data recordscontaining channel assignment and line interface data for each call, a second memory forstoring data received from the host computer identifying the target line interface with animminent hand off from the active line interface associated with the call, and an
arrangement for assigning a channel associated with the active line interface to the targetline interface on receipt of a call origination signal on the target line interface. In this way,
a hand off can take place simply by writing the new line interface data into the existingcall data record.
申请人：MITEL CORPORATION
代理机构：Marks & Clerk
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