SETTING A COMMUNICATION CHANNEL

• US 20080117870A1
• Filed: 10/31/2007
• Published: 05/22/2008
• Est. Priority Date: 04/10/2000
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Tuija Hurtta
• Inventors: Hurtta, Tuija
• Granted Patent: US 7,606,152 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

In a packet switched wireless communications network, a parameter of a communication channel request indicates that the communication channel is to be used to transfer call related control messages. Upon receipt of the communication channel request, a network element sends a request to a radio access network that a part of the communication channel should be setup to transfer call related control messages. Another network element sets filtering information to allow only specific messages to be transferred on the communication channel. Specifically, the filtering information is set such that only call related control messages may be transferred on the communication channel. The other network element then sends the filtering information to the user equipment (UE). The UE derives the uplink filtering information from the received filtering information.

Claims

1-34. -34. (canceled)

35. A packet switched wireless communication network, comprising:

a first network element generating a request to setup a communication channel and including in said request a parameter indicating that the communication channel will be used for transferring call related control messages to or from said first network element; and

a second network element, said second network element receiving from said first network element, said request to setup a communication channel having an indication indicating that the communication channel will be used for transferring call related control messages to or from said first network element;

at least one of said first or second network element setting filtering information for said communication channel in response to receiving said request to set up said communication channel; and

at least one of said first network element and said second network element filtering messages transferred on said communication channel according to said filtering information set in response to receiving said parameter.

36. A packet switched wireless communication network as recited in claim 35, wherein said first network element is a user equipment and said second network element is a gateway GPRS support node (GGSN).

37. A packet switched wireless communication network as recited in claim 35, further comprising a radio access network, said second network element sending a request to setup part of the communication channel to said radio access network, said request including the parameter indicating that the communication channel will be used for transferring call related control messages.

38. A user equipment in a packet switched wireless communications network, said user equipment being adapted to:

generate a request to setup a communication channel;

include in the request, a parameter which indicates that said communication channel will be used for transferring call related control messages to or from said user equipment and that filtering information should be set in response to said request; and

send, to another network element in said packet switched wireless communications network, said request to setup said communication channel, said request having the parameter indicating that the communication channel will be used for transferring call related control messages to or from said user equipment and that filtering information should be set in response to said request.

39. The user equipment recited in claim 38, wherein the user equipment sets said filtering information.

40. The user equipment recited in claim 38, wherein the user equipment filters uplink data traffic using said filtering information.

41. The user equipment recited in claim 38, wherein said filtering information is a Traffic Flow Template (TFT).

42. The user equipment recited in claim 38, wherein said communication channel is a PDP context and the request to set up a communication channel comprises an Activate Secondary PDP Context Request or an Activate PDP Context Request.

43. The user equipment recited in claim 38, wherein the another network element is a serving GPRS support node (SGSN) or a gateway GPRS support node (GGSN).

44. The user equipment recited in claim 38, wherein the another network element sets said filtering information.

45. A node in a packet switched wireless communications network, said node being adapted to:

receive, from another network element in said packet switched wireless communications network, a request to setup a communication channel, said request including a parameter, said parameter indicating that the communication channel will be used for transferring call control messages;

set filtering information for said communication channel in response to receiving the parameter from the request to set up a communication channel for call related control messages;

monitor the data sent on said communication channel based on said filtering information; and

block the data from transfer in said communication channel if the data is not call related control messages.

46. The node of claim 45, wherein said another network element is a user equipment or a serving GPRS support node (SGSN).

47. The node recited in claim 45, wherein said filtering information is a Traffic Flow Template (TFT).

48. The node recited in claim 45, wherein said communication channel is a PDP context and the request to set up a communication channel comprises a Create PDP Context Request.

49. The node recited in claim 45, wherein the node is a a gateway GPRS support node (GGSN).