Identifying a mobile station in a packet radio network

Details Identifying a mobile station in a packet radio network Identifying a mobile station in a packet radio network

2011-06-07

2011-06-07

Appiah, Charles N (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S432100, C455S456300, C455S433000, C455S426100, C455S458000, C455S404200, C455S440000, C455S439000, C455S432300

Reexamination Certificate

active

07957736

ABSTRACT:
In conventional cellular systems, the identifier of network elements (SGSN) allocating a temporary identity (TLLI) to a mobile station (MS) can be derived from the identities of the cells they serve. In the future, this assumption may no longer be valid. One paging area could be handled by several network elements, such as SGSN nodes, or one network element could serve many paging areas. When the mobile station changes its paging area, the new supporting network element may have trouble in determining the old supporting network element on the basis of the paging area identifier. It is also possible for two supporting network elements to allocate the same TLLI to two different mobile stations. Therefore the network element (SGSN, BSC, RNC) allocating a temporary identity (TLLI) to a mobile station (MS) should incorporate at least part of its own identifier (NEI) into the temporary identity (TLLI).

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