Motorola Corporation

Motorola Solutions, Inc.

Steen Petersen

David J Chater-Lea

Svend Frandsen

Nanna Svane Theisen

David John Chater-Lea

A method and system are presented in which communication redundancy is provided. Multicast packets having the same audio and/or control data are simultaneously transmitted between an RF site and different switches through different communication links. The packets from the RF site have different origination addresses and a unique ID, which permits duplicate packets having different origination addresses but the same unique ID and data to be eliminated and only one set of packets to be transmitted over the air to a receiving end device for which the packets are intended. A switch communication link between the switches permits the primary switch to establish operating characteristics for the alternate switch.

RF site resilience using multiple visitor location registers simultaneously

A method of controlling location information of subscribers () in a wireless, ad-hoc communications network (). The network () comprises a plurality of nodes (), wherein at least portion of said nodes are provided with Home Location Registers (HLRs) () and each of said nodes () has a Visitor Location Register (VLR) (). When an operation of a first node () is to be reconfigured at least a part of records from a first HLR () assigned to said first node () are transferred to at least one of the other nodes () of the network ().

Ad-hoc communication network and method

A wireless, ad-hoc or private communications network comprising nodes, forming with other elements of the network a switching and management infrastructure (SwMI), and subscribers, wherein each of said nodes has a Visitor Location Register (VLR), and at least a part of said nodes are provided with Home Location Registers (HLRs) and at least a part of said nodes with said HLRs are provided with gateways, wherein in said network every node with an HLR is assigned to a node having a gateway and said SwMI directs calls to and from a subscriber of said network to an external network.

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Frederiksberg, Denmark

Steen Petersen