Clearwire IP Holdings L.l.c.

Clear Wireless LLC

Deutschetelekom Ag

Nextel Communications Inc.

Clearview IP Holdings LLC

Feng Huang

Mohammad Hassan Partovi

David S McGinniss

Lei Zhu

Chunmei Liu

Masoud Olfat

Zheng Cai

Rajesh Gangadhar

Hung Viet Bui

Mehdi Alasti

Peter Lothberg

A method for monitoring optical performance in an optical data transmission network, the optical data transmission network including a first router node, a second router node, and an optical data transmission line connecting the first router node with the second router node providing optical data transmission from the first router node to the second router node using at least two channels, includes: in a measurement step, determining, at the spare IP router interface, optical performance parameters of the at least two channels; in a transmission step subsequent to the measurement step, transmitting the determined optical performance parameters to a remote control unit; and in an analysis step subsequent to the transmission step, analyzing the transmitted optical performance parameters and determining whether to take a corrective action to improve optical performance of the at least two channels.

Monitoring of optical performance in an optical data transmission network

A method, apparatus and computer-readable medium for improving push-to-talk call setup speed by disabling an idle mode of a mobile station are provided. According to the method, a deregistration request is received from a mobile station. The base station determines whether a push-to-talk service flow exists for the mobile station, based upon a unique identifier for push-to-talk service flow for the mobile station. If the service flow does exist, then the base station transmits a deregistration command to the mobile station including an action code that instructs the mobile station to disable its idle mode and change its mobility feature supported field to sleep only mode. Since the time required to transition from sleep mode to active mode is less than from idle mode to sleep mode, the push-to-talk call setup speed is improved.

Method, apparatus and computer-readable medium for improving push-to-talk call setup speed

In various embodiments, methods and systems are provided for acquiring a mobile internet protocol address in a communication network. In an embodiment, a mobile network internet node key is sent to a service node. A mobile network internet node sends a mobile internet protocol access request message to an authentication node. The authentication node can then receive the mobile network internet node key transferred from the service node. In response to receiving a mobile internet protocol access accept message at the mobile network internet node transferred from the authentication node where the mobile internet protocol access accept message comprises the mobile network internet node key, the mobile internet protocol address is assigned at the mobile network internet node to a mobile station associated with a user identifier.

Methods for obtaining a mobile internet protocol address

A method of operating a communication system comprises exchanging initial communications between a wireless communication device and a communication network over a wireless connection between the wireless communication device and a network access system and a network connection between the wireless communication device and the communication network. The method further comprises performing a plurality of ranging processes to monitor a status of the wireless connection. Upon successfully completing a ranging process of the plurality of ranging processes, the method comprises determining a duration elapsed since the last successful ranging process and processing the duration to determine if the duration satisfies a criteria. The method further comprises, if the duration does not satisfy the criteria, then setting the indicator to indicate that a partial entry process is required to regain the network connection, and in response to the deterioration of the wireless link, processing the indicator to determine if the partial network entry process is required to regain the network connection.

Wireless communication system

A method of operating a communication system comprises exchanging initial communications between a wireless communication device and a communication network over a wireless connection between the wireless communication device and a network access system and over a network connection between the wireless device and the communication network. The method further comprises, in response to a loss of the network connection due to a deterioration of the wireless connection, determining if a partial network entry process is possible to regain the connection, and if the partial network entry process is possible to regain the network connection, performing the partial network entry process. The method further comprises, in response to an improvement of the wireless connection and upon regaining the network connection, exchanging new communications between the wireless communication device and the communication network over the wireless connection and the network connection.

Method for obtaining a mobile internet protocol address

In various embodiments, methods and systems are provided for acquiring a mobile internet protocol address in a communication network. In an embodiment, an authentication node sends a mobile network internet node notification message to a mobile network internet node where the mobile network internet node notification message comprises an authentication node identifier associated with a user identifier. A mobile internet protocol request message is sent from a gateway node to the mobile network internet node. A mobile internet protocol access request message is sent from the mobile network internet node to the authentication node utilizing the authentication node identifier associated with a user identifier. A mobile internet protocol access accept message is received at the mobile network internet node transferred from the authentication node where the mobile internet protocol access accept message comprises a mobile network internet node key. The mobile internet protocol address is assigned at the mobile network internet node to a mobile station associated with the user identifier.

In various embodiments, methods and systems are provided for acquiring a mobile internet protocol address in a communication network. In an embodiment, a gateway node generates an extension where the extension comprises an authentication node identifier associated with a user identifier. The gateway node then sends a mobile internet protocol request message to a mobile network internet node where the mobile internet protocol request message comprises the extension. The mobile network internet node can then send a mobile internet protocol access request message to an authentication node utilizing the authentication node identifier obtained from the extension. In response to receiving a mobile internet protocol access accept message at the mobile network internet node transferred from the authentication node where the mobile internet protocol access accept message comprises the mobile network internet node key, the mobile network internet node assigns the mobile internet protocol address to the mobile station associated with the user identifier. A mobile internet protocol session accept message is sent to a mobile station wherein the mobile internet protocol session accept message comprises the mobile internet protocol address.

A method of operating a communication system is disclosed. A first communication session between a first base station and a mobile station is established. A service session between a first access network and the mobile station is established. When the mobile station moves to the service area of a new base station, a second communication session between a second base station and the mobile station is established. A distance between the first base station and the second base station is determined. If the distance exceeds a criteria, the service session is handed off a second access network. The criteria, which must be greater than zero, corresponds to the number of base station service areas separating the first base station and the second base station.

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Herndon, VA, United States of America

Feng Huang