Resolving handover in presence of coverage area identifier conflict

摘要

A method and system for resolving handover in the presence of coverage area identifier conflict is disclosed. In a market area in which an LTE RAN and CDMA RAN operate, a base station receives a PCI that indicates a particular one of the LTE coverage areas detected by a mobile terminal. The base station determines that at least two of the LTE coverage areas have the particular PCI. Thereafter, the base station determines which one of the LTE coverage areas is the particular LTE coverage area that was indicated by the particular PCI based at least in part on a particular PN offset that indicates a particular CDMA coverage area of the CDMA RAN. The base station then arranges for handover to the particular LTE coverage area.

主权项

1. In a system comprising a first radio access network (RAN) that is a Long Term Evolution (LTE) network and a second RAN that is a Code Division Multiple Access (CDMA) network, wherein the first RAN has first base stations that radiate to provide first coverage areas, wherein each first coverage area of the first RAN has an identifier of a first type that is a Physical Channel ID, wherein the second RAN has second base stations that radiate to provide second coverage areas, wherein each second coverage area of the second RAN has an identifier of the second type that is different from the first type and that is a pseudo-noise (PN) Offset, a method comprising:
receiving into a particular one of the first base stations of the first RAN, wirelessly from a mobile terminal, (i) a handover request that specifies a particular one of the identifiers of the first type as an indication of a particular one of the first coverage areas detected by the mobile terminal and (ii) a specification of a particular one of the identifiers of the second type as an indication of a particular one of the second coverage areas detected by the mobile terminal; based at least in part on the received specification of the particular identifier of the second type, determining by the particular first base station which one of the first coverage areas is the particular first coverage area that was indicated by the particular identifier of the first type in the handover request; and based on the determining, arranging for handover of the mobile terminal to the determined coverage area.