D
Derek Hisami Mitsumori
Researcher at Rakuten
Publications - 5
Citations - 341
Derek Hisami Mitsumori is an academic researcher from Rakuten. The author has contributed to research in topics: Communications system & Call control. The author has an hindex of 5, co-authored 5 publications receiving 341 citations. Previous affiliations of Derek Hisami Mitsumori include Verizon Communications.
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Patent
Voice over internet protocol (VoIP) network performance monitor
TL;DR: In this paper, a method for deriving packet delivery statistics from a UDP stream simulating a service level provided by a VoIP network was proposed, where the second pre-defined interval is substantially larger than the first predefined interval.
Patent
E911 Location Server
TL;DR: In this article, a system including a location server configured to receive registration data from an IP device and a location database configured to store location information of the IP device is described, in which the location server queries the location database to determine whether the registration data matches the location information stored at the database.
Patent
PBX call management
Robert Olshansky,Eric R. Sporel,Robert H. Liao,Derek Hisami Mitsumori,Sujin Catherine Chang,James Flynn +5 more
TL;DR: In this paper, a call management service to users receiving incoming calls on extensions on a private branch exchange (PBX) is provided by an application server configured to provide call management services to at least one of the users and a protocol proxy configured to receive call information from the PBX.
Patent
System and method for generating reports in a network
TL;DR: In this article, the authors describe methods and systems for generating reports in a communication network, where the system processes a communication at an enterprise gatekeeper; stores information associated with the communication; parses the associated information; and provides an indication of the parsed information.
Patent
System and method for monitoring communications in a network
TL;DR: In this paper, the authors describe a system for monitoring communications in a packet-switched network, where the system initiates a communication between a network endpoint associated with a call mediator and at least a second network endpoint; records, at the mediator, information associated with the communication; and upon termination of the communication, communicates, from the call mediators to an enterprise gatekeeper, the information associated to the communication.