Method for improving efficiency in a time sharing network

• US 7,889,704 B2
• Filed: 06/30/2005
• Issued: 02/15/2011
• Est. Priority Date: 05/25/1999
• Status: Expired due to Fees

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Hong, Liang A.
• Primary Examiner(s): Juntima; Nittaya
• Application Number:
  US11/169,703
• Publication Number:
  US 20050238042A1
• Time in Patent Office: 2,056 Days
• Field of Search: 370/329, 370/336, 370/337, 370/345, 370/347, 370/349, 370/431, 370/442, 370/445, 370/447, 370/450, 370/458, 370/459, 370/461, 370/462
• US Class Current: 370/337
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• 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 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 74/02 Hybrid access
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/0841 with collision treatment

Abstract

The present invention provides methods for improving the performance and efficiency of time sharing wireless networks by reducing collisions, eliminating wasted bandwidth caused by unnecessary gaps between transmissions, and reducing the amount of control information broadcast from the base station. The present invention accomplishes this by synchronizing the actions of the remote units in the wireless network to the control messages sent by the base unit and having the base unit compensate for the inherent system latency in determining when control messages should be sent. The present invention also consolidates the functionality of some of the control messages in order to reduce bandwidth usage.

Claims

1. A method for reducing collisions in a time sharing wireless system comprising:

transmitting by a base unit on a wireless channel a superslot comprising a plurality of timeslots and including only a single status message at the beginning of the superslot, wherein a total length of the superslot is determined to mitigate occurrence of a collision during a collision interval;

monitoring said wireless channel; and

when a seizure of said wireless channel occurs, toggling a state of the single status message for a next superslot.

2. The method of claim 1 further comprising:

receiving at a remote unit said superslot; and

determining at said remote unit, based on said status message in said superslot, whether to seize said wireless channel.

3. The method of claim 2 wherein said status message is further used to indicate whether the base unit has successfully decoded a previous transmission.