Method and system for serverless voip service in personal communication network

Abstract

Method and system for supporting serverless VoIP service are provided. Network information of a first device and a second device is exchanged through a telecommunication network. A VoIP connection between the first and second devices can be established through an internet based network according to the exchanged network information. The network information may comprise an IP address and a port number, and can be delivered by short message service.

1 . A method of Voice over Internet Protocol (VoIP) between a first device and a second device, wherein the first device and the second device respectively having a network information corresponding to a network with at least one server, comprising:
 exchanging the network information between the first device and the second device through the network without a prior registration to the server;   sending a signaling invite request through the network from the first device to the second device according to the network information of the second device;   sending a signaling confirm through the network from the second device to the first device if the second device accepts the signaling invite request; and   replying with a signaling acknowledgement through the network from the first device to the second device to establish a VoIP connection between the first device and the second device,   wherein the signaling invite request, the signaling confirm and the signaling acknowledgement are transmitted without through the server.   
   
   
       2 . The VoIP method according to  claim 1 , wherein the network information comprises an IP address and a port number. 
   
   
       3 . The VoIP method according to  claim 1 , wherein the exchanging step further comprises:
 sending a query instant message carrying the network information of the first device to the second device; and   responding the query instant message with a response instant message carrying the network information of the second device to the first device when the query instant message is received by the second device.   
   
   
       4 . The VoIP method according to  claim 3 , wherein the query instant message and the response instant message respectively comprise a user name, a user phone number, an IP address and a port number. 
   
   
       5 . The VoIP method according to  claim 1 , wherein the network information of the second device is stored in at least one database, further comprising:
 validating the network information of the second device stored in the database.   
   
   
       6 . The VoIP method according to  claim 5 , further comprising:
 deleting the network information of the second device from the database.   
   
   
       7 . The VoIP method according to  claim 5 , further comprising sending a signaling update through the network to the second device according to the network information of the second device stored in the database when the network information of the first device is changed, wherein the signaling update carries the updated network information of the first device. 
   
   
       8 . The VoIP method according to  claim 5 , wherein the exchanging step further comprising:
 checking whether the network information of the second device is in the database; and   if yes, directly taking the network information of the second device in the database as the exchanged network information.   
   
   
       9 . The VoIP method according to  claim 1 , wherein the network information is exchanged using short message service (SMS), Multimedia Messaging Service (MMS), or Instant Messaging and Presence Services (IMPS) provided by the network. 
   
   
       10 . The VoIP method according to  claim 1 , wherein the network information is exchanged using email service provided by the network. 
   
   
       11 . The VoIP method according to  claim 1 , wherein the VoIP connection is established by sending and receiving Session Initiation Protocol (SIP) packets according to the exchanged network information. 
   
   
       12 . The VoIP method according to  claim 1 , wherein the network is a WLAN or LAN network, or a GSM, GPRS, EDGE, CDMA, WCDMA, or LTE communication network. 
   
   
       13 . A Voice over Internet Protocol (VOIP) system in a network with at least one server, comprising:
 a first device; and   a second device, wherein the first device and the second device respectively have a network information corresponding to the network, the first device and the second device exchanges their network information without a prior registration to the server;   wherein a VoIP connection between the first device and the second device through the network according to the exchanged network information is established by sending a signaling invite request from the first device to the second device through the network, sending a signaling confirm from the second device to the first device when the second device accepts the signaling invite request, and replying with a signaling acknowledgement from the first device to the second device when the first device receives the signaling confirm, and   wherein the signaling invite request, the signaling confirm and the signaling acknowledgement are transmitted without through the server.   
   
   
       14 . The VoIP system according to  claim 13 , wherein the network information comprises an IP address and a port number. 
   
   
       15 . The VoIP system according to  claim 13 , wherein the first device sends a query instant message carrying the network information of the first device to the second device, and the second device replies with a response instant message carrying the network information of the second device to the first device when receiving the query instant message from the first device. 
   
   
       16 . The VoIP system according to  claim 15 , wherein the query instant message and the response instant message respectively comprise a user name, a user phone number, an IP address and a port number. 
   
   
       17 . The VoIP system according to  claim 13 , wherein the network information of the second device is stored in at least one database. 
   
   
       18 . The VoIP system according to  claim 13 , wherein the network information is exchanged using short message service (SMS), Multimedia Messaging Service (MMS), or Instant Messaging and Presence Services (IMPS) provided by the network. 
   
   
       19 . The VoIP system according to  claim 13 , wherein the network information is exchanged using email service provided by the network. 
   
   
       20 . The VoIP system according to  claim 13 , wherein the VoIP connection is established by sending and receiving Session Initiation Protocol (SIP) packets according to the exchanged network information. 
   
   
       21 . The VoIP system according to  claim 13 , wherein the first device and the second device are mobile phones. 
   
   
       22 . The VoIP system according to  claim 13 , wherein the network is a WLAN or LAN network, or a GSM, GPRS, EDGE, CDMA, WCDMA, or LTE communication network. 
   
   
       23 . The VoIP system according to  claim 13 , wherein the network further comprises a Short Message Service Center (SMSC) for exchanging the network information using short message service (SMS). 
   
   
       24 . The VoIP system according to  claim 13 , further comprises at least one Access Point connecting to both the first and second mobile devices. 
   
   
       25 . The VoIP system according to  claim 13 , further comprises at least one base station connecting to both the first and second devices.