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Maintaining minimum quality of service (QoS) communication sessions during hard handoffs

A communication session, quality of service technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as temporary interruption of radio layer connection

Inactive Publication Date: 2010-03-31
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Hard handover of the access terminal between the first access network and the second access network when a communication session is being transferred from the first access network to the second access network during a VoIP call will cause a temporary loss of connectivity at the radio layer

Method used

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  • Maintaining minimum quality of service (QoS) communication sessions during hard handoffs
  • Maintaining minimum quality of service (QoS) communication sessions during hard handoffs
  • Maintaining minimum quality of service (QoS) communication sessions during hard handoffs

Examples

Experimental program
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Embodiment Construction

[0022] figure 1 is a block diagram illustrating an exemplary wireless communication system 10 capable of supporting a minimum QoS communication session with WCD 12 during a hard handoff between access networks 16A and 16B. Such as figure 1 As shown, wireless communication system 10 may include WCD 12 and one or more access networks 16A, 16B. In other arrangements, wireless communication system 10 may include multiple WCDs and multiple access networks. First access network 16A may include a first base station 18A that transmits data signals to and receives data signals from WCD 12 over traffic channel 14A. Similarly, second access network 16B may include a second base station 18B that transmits and receives data signals to and from WCD 12 over traffic channel 14B. In other arrangements, each access network 16A, 16B may include multiple base stations.

[0023]WCD 12 may communicate with one or more of base stations 18A, 18B included in respective access networks 16A, 16B. A...

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Abstract

The disclosure relates to techniques for maintaining minimum quality of service (QoS) communication sessions with a wireless communication device (WCD) over a data-based communication network during a hard handoff between access networks for the WCD. More specifically, the techniques determine whether a closed connection between the WCD and a first access network during a minimum QoS communication session is due to a hard handoff between the first access network and a second access network. In the case of a hard handoff, the techniques maintain open QoS reservations associated with data flows included in the minimum QoS communication session for a predetermined period of time to enable a new connection to be established between the WCD and a second access network. The techniques described herein may especially useful when performing a voice over Internet Protocol (VoIP) call over an Evolution - Data Optimized (EVDO) communication network.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This patent application claims priority to Provisional Application No. 60 / 946,955, filed June 28, 2007, entitled "Maintaining Minimum Quality Of Service (Qos) Communication Sessions During Hard Handoffs," and assigned to the assignee of this application right, and is expressly incorporated herein by reference. technical field [0003] The present disclosure relates to maintaining a communication session with a wireless communication device. Background technique [0004] Evolved Data Optimized (EVDO) is a wireless radio broadband data standard that evolved directly from the cdma2000 Single Carrier Radio Transmission Technology (1xRTT or simply 1x) standard operating on a Code Division Multiple Access (CDMA) network infrastructure. EVDO includes Internet Protocol (IP)-based networking and Quality of Service (QoS) mechanisms to support applications that rely on fast set-up and low-latency transport over packet networks....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/24H04W36/28
CPCH04W36/26H04W28/24H04W36/0055H04W36/0058H04W36/0079
Inventor A·T·帕亚皮利L·沈P·A·阿加什R·沙希迪
Owner QUALCOMM INC
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