Microsoft Technology Licensing, LLC

Nirav Girish Shah

Kuansan Wang

Michael James Ott

John A Shepard

Ramesh Thimmarajarasu Bangalore

David Robert Shutt

Matthew Lenell Cooper

Jagan Peri

Eric Liu

Pat Munns

A dynamic load balancing system is described that determines the load of resources in a hosted environment dynamically by monitoring the usage of resources by each customer and determines the number of customers hosted by a server based on the actual resources used. The system receives a performance threshold that indicates when a server is too heavily loaded and monitors the resource usage by each customer. When the load of an overloaded server in the hosted environment exceeds the received performance threshold, the system selects a source customer currently hosted by the overloaded server to move to another server.

Automatic load balancing, such as for hosted applications

Technologies are described herein for implementing a hosted multi-tenant application system. The server computers utilized to provide the hosted application are organized into logical groupings of server computers called scale groups. One or more tenants are assigned to each scale group. When a new tenant is provisioned, the tenant is assigned to a scale group and a database server in the assigned scale group creates a database for the tenant. An association between the tenant and the scale group is also created in a shared configuration database. When a request is received from a tenant to access the hosted application, the shared configuration database is consulted to locate the scale group hosting the tenant. Once the appropriate scale group has been located, the request is redirected to the appropriate scale group for processing.

Multi-tenant hosted application system

Described is automatically testing the quality of an audio channel between a caller and a callee that includes a device under test, such as a VoIP or other gateway. An analyzer receives timestamps from a caller and callee during a calling session, including timestamps for when the callee initially provides audio (e.g., speech) to the caller, when the caller initially detects sound, when the caller initially provides audio to the callee, and when the callee initially detects sound. The analyzer uses the relative timing of the timestamps and the speech recognizer's outcome to determine whether the audio channel is experiencing interference or echo. When the audio includes speech, a confidence level corresponding to accuracy of speech recognition also may establish the audio channel's quality. Random selection and timing of output may be employed, such as to vary the testing patterns during repetitive tests.

Assessing gateway quality using audio systems

Described is automatically testing the quality of an audio coupling between juxtaposed first and second digital telephones, e.g., VoIP telephones, such as to quantitatively determine the quality of audio echo cancellers in those digital telephones. An analyzer receives timestamps from a first telephone and second telephone during a calling session, including timestamps for when the second telephone initially provides audio (e.g., speech) to the first telephone, when the first telephone initially detects sound, when the first telephone initially provides audio to the second telephone, and when the second telephone initially detects sound. The analyzer uses the relative timing of the timestamps and the speech recognizer's outcome to determine whether the audio coupling is experiencing interference or echo. When the audio includes speech, a confidence level corresponding to accuracy of speech recognition also may establish the audio coupling's quality.

Testing acoustic echo cancellation and interference in VoIP telephones

A Managed Add-in Framework (MAF) proxy generation tool comprises a library analyzer module operable for taking as input either a type library or managed software code assembly of the existing host application, and a proxy code generation module. Also, an additional input XML file that describes changes that a user would like to be made may be received by the tool and data acquired form the inspection of the additional input XML file and the inspection of the other inputs is merged and used to create the code of the proxy to the host object model. The proxy to the host's object model conforms to requirements of the MAF.

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Redmond, WA, United States of America

Nirav Girish Shah