Unlock instant, AI-driven research and patent intelligence for your innovation.

Wireless voip/vip roaming to access point of different network type

A technology of IP address and wireless communication, applied in the field of IP telephone technology, and can solve the problem that the call handover method cannot be practiced, etc.

Inactive Publication Date: 2008-10-22
QUALCOMM INC
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The call handover method is thus impractical

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wireless voip/vip roaming to access point of different network type
  • Wireless voip/vip roaming to access point of different network type
  • Wireless voip/vip roaming to access point of different network type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] figure 1 is a simplified topology diagram of an IP (Internet Protocol) telephony communication system 1 according to a novel aspect. First party ( figure 1Indicated as "Party A") uses a mobile wireless communication device such as an IP phone 2. IP Phone 2 has the figure 1 The IP address marked as IP address #1 in . As long as the IP telephone 2 is within the communication range of the access point 3 on the LAN (Local Area Network) 4 , the IP telephone 2 can perform short-distance wireless communication with the access point 3 . In this example, the IP phone 2 communicates with the access point 3 according to the IEEE 802.11 specification. The LAN 4 includes a plurality of such access points so that the A-party can move the IP phone 2 back and forth in the local area and still maintain communication with the LAN 4 through at least one of these access points.

[0034] System 1 also includes a cellular telephone network 5 . The cellular telephone network 5 in this e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A mobile communication device (for example, a cellular telephone) has one air interface for wireless communication with wireless LAN and another air interface for cellular telephone communication with a cellular telephone network. Initially, the communication device is used to transmit VoIP packets of a media stream to a target communication device in a first session across one of the air interfaces. It is then desired to use the other air interface. A spawn SIP message is communicated to the target, which returns a spawn identifier. The communication device sets up a second session by sending a SIP INVITE containing the spawn identifier to the target across the other air interface. Both sessions are active VoIP sessions. The target uses the spawn identifier to associate the first and second sessions. The flow of VoIP packets for the media stream is then switched from the first session to the second session.

Description

technical field [0001] The various disclosed embodiments relate generally to IP telephony. Background technique [0002] Mobile communication devices, such as cellular telephones, may have more than one air interface. In one example, cellular telephones are capable of routinely communicating with cellular telephone networks over relatively long distances using CDMA (Code Division Multiple Access) transceivers. The CDMA transceiver of the cellular telephone communicates with a cellular BTS (Base Transmitter Station) on the cellular telephone network. In addition, cellular telephones are capable of communicating with wireless local area networks (LANs) over relatively short distances using IEEE 802.11 transceivers. The 802.11 transceiver of the cell phone communicates wirelessly with the access point on the LAN. [0003] A first party may initiate a call to a second party using a cellular telephone using VoIP (Voice over Internet Protocol) technology. Voice data is transmi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L29/06H04L29/08H04Q7/32H04Q7/38H04W36/00H04W80/00H04W80/04H04W80/10H04W84/04H04W84/12H04W88/06
CPCH04M7/128H04W36/14H04W80/10H04L65/1083H04L29/06027H04W84/12H04W36/0011H04L29/06353H04W88/06H04L65/608H04W84/042H04L29/06517H04W80/04H04L29/06197H04L65/1006H04L65/1104H04L65/65H04W36/144H04W36/0019H04L12/66H04L65/1101
Inventor S·R·科蒂林盖尔
Owner QUALCOMM INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com