Method and apparatus for time-based reception of transmissions in a wireless communication system

• US 20050089004A1
• Filed: 08/13/2004
• Published: 04/28/2005
• Est. Priority Date: 08/16/2001
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Casaccia, Lorenzo, Sinnarajah, Ragulan
• Granted Patent: US 8,208,388 B2
• Time in Patent Office: Days
• US Class Current: 370/347
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/1657 Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/188 Time-out mechanisms

Abstract

Method for segmented message transmission wherein each message is first divided into segments and the segments are fragmented. A segment parameter is applied to each segment, and a segment identifier to each fragment. The fragments are provided to a lower level for preparation into frames for transmission. One embodiment is applied to the transmission of short duration messages, such as control messages. A timer is used to detect an erasure within a plurality of transmission frames, wherein the timer uses an average inter-arrival time period between transmitted frames to determine a missing frame. In one embodiment, the time period is given as α*AIT, wherein a is a constant value, and AIT is the average inter-arrival time of frames.

Claims

1. In a wireless communication system having a base station controller and a plurality of base stations, each of the plurality of base stations adapted for communication with a plurality of mobile stations, a method comprising:

receiving a plurality of transmission frames, each of the plurality of transmission frames having an identifier;

detecting a first frame erasure within the plurality of transmission frames;

initiating a first timer, wherein the first timer has a first time period determined by an average inter-arrival time period between transmitted frames; and

on expiration of the first timer determining the identification of the first frame erasure.

2. The method as in claim 1, further comprising:

prior to expiration of the first timer, detecting a second frame erasure; and

initiating a second timer;

stopping the first timer; and

on expiration of the second timer determining the identification of the second frame erasure.

3. The method as in claim 2, wherein the first timer has a first time period and the second timer has a second time period.

4. A wireless apparatus, comprising:

receiver for receiving a plurality of transmission frames;

means for detecting a frame erasure;

first timer means responsive to detection of a first frame erasure;

the first timer means having means to determine an average inter-arrival time period between transmitted frames;

and means for determining an identifier corresponding to a first frame associated with the first frame erasure; and

second timer means responsive to detection of a second frame erasure.

5. The wireless apparatus as in claim 4, wherein the means for determining an identifier is adapted to determine an identifier corresponding to a second frame associated with the second frame erasure.

6. A wireless apparatus having a memory storage unit for storing:

a first set of computer-readable instructions for receiving a plurality of transmission frames;

a second set of computer-readable instructions for detecting a frame erasure;

a third set of computer-readable instructions for a first timer responsive to detection of a first frame erasure wherein the third set of instructions determine an average inter-arrival time between transmitted frames; and

a fourth set of computer-readable instructions for a second timer responsive to detection of a second frame erasure.

7. The wireless apparatus as in claim 6, further comprising:

a fifth set of computer-readable instructions for determining an identifier corresponding to a first frame associated with the first frame erasure.

8. The wireless apparatus as in claim 7, wherein the fifth set of computer-readable instructions is adapted to determine an identifier corresponding to a second frame associated with the second frame erasure.