Method for providing supplementary services to a mobile station by sending DTMF tones to a remote party of an active call

• US 6,205,328 B1
• Filed: 04/25/1996
• Issued: 03/20/2001
• Est. Priority Date: 09/03/1993
• Status: Expired due to Fees

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lantto, Sven Jörgen, Stille, Mats Ola
• Primary Examiner(s): Cumming, William
• Application Number:
  US08/637,588
• Time in Patent Office: 1,790 Days
• Field of Search: 379/58, 379/67, 455/414
• US Class Current: 455/414.1
• CPC Class Codes: H04M 3/42 Systems providing special services or facilities to subscribers specially adapted for wireless communication networks H04W4/00
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold

Abstract

Methods and systems for signalling between a mobile station and a network for requesting supplementary services are disclosed. The network implicitly assumes that signals from a mobile station relate to either a held or active call or that a second action is required after the requested action is performed so that the complexity of the mobile unit can be reduced.

Claims

1. A signalling method for a radiocoinmunication system having a mobile station and a network comprising the steps of:

establishing an active call and a held call between said mobile station and said network;

transmitting a signal from said mobile station to said network requesting that DTMF tones be transmitted;

detecting, in said network, that said mobile station has a call on hold; and

interpreting, in said network, said signal as a request to send DTMF tones to a remote party associated with said active call; and

sending DTMF tones to said remote party associated with said active call rather than to a remote party associated with said call on hold.