METHOD AND APPARATUS FOR CALL SETUP LATENCY REDUCTION

• US 20070086390A1
• Filed: 11/30/2006
• Published: 04/19/2007
• Est. Priority Date: 08/17/2001
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Rezaiifar, Ramin, Wang, Jun, Ho, Duncan, Sinnarajah, Ragulan, Tiedemann, Edward
• Application Number:
  US11/565,597
• Publication Number:
  US 20070086390A1
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 2212/00 Encapsulation of packets
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/19 Connection re-establishment

Abstract

Techniques for minimizing call setup latency are disclosed. In one aspect, a channel assignment message is sent with a flag to direct the use of previously negotiated service parameters. This aspect eliminates the need for service negotiation messages. In another aspect, a channel assignment message is sent with an active set identifier instead of an active set and its parameters. This aspect reduces the transmission time of the channel assignment message. In yet another aspect, call setup without paging is facilitated by a mobile station (106) sending a pilot strength measurement message between active communication sessions, such that a channel assignment message can be used for mobile station terminated call setup without the need for mobile station paging and related messages.

Claims

1. A method for initiating mobile station terminated call setup without paging, the mobile station being in the idle state, comprising:

the mobile station entering the system access state to deliver to a base station a pilot strength measurement message.

2. The method of claim 1, further comprising the base station sending the mobile station a channel assignment message with an active set based on the information in the pilot strength measurement message.

3. The method of claim 2, wherein the active set information is transmitted using an active set identifier.

4. The method of claim 2, further comprising the mobile station sending an authentication message to the base station on the traffic channel set up in response to the channel assignment message.

5. A wireless communication system for initiating mobile station terminated call setup without paging, comprising:

a first station; and

a second station for receiving a pilot strength measurement message from the first station, conditioned on the first station'"'"'s reception of one or more additional pilot signals at a strength exceeding a threshold, and for sending a channel assignment message to the first station with active set information based on the pilot strength measurement message.

6. A wireless communication system for initiating first station terminated call setup without paging, comprising:

a second station; and

a first station for receiving a channel assignment message with previously used active set information, and for conditionally sending the second station a pilot strength measurement message when one or more additional pilot signals are received which exceed a threshold.