Optimized resource allocation for wireless device in packet transfer mode

Abstract

A system and method allows a network, in response to a cell reselection notice, to serve a wireless, wireless device sufficient data to complete a pending data transfer instead of performing the immediate cell change. Appropriate allocation of radio resources to the wireless device in the current serving cell and before cell change allows reduced packet data transfer latencies for small data sessions, better load balancing and traffic resourcing between cells, appropriate allocation of uplink resources in the new target cell, and enhanced control over network congestion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of and incorporates by reference U.S. patent application Ser. No. 12 / 621,401 filed on Nov. 18, 2009.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0002]Not applicable.BACKGROUND OF THE DISCLOSURE[0003]The present disclosure relates generally to systems and methods for communications between a wireless device and a network and, more particularly, to systems and methods for coordinating communications during a wireless device changing between cells of a network.[0004]As used herein, the term wireless device can refer to a variety of wireless devices such as mobile telephones, personal digital assistants (PDAs), handheld or laptop computers, and similar devices, including mobile stations (MS), user agent (UA), or user equipment (UE) that have telecommunications capabilities. In some embodiments, a wireless device may refer to a mobile, wireless device. The term wireless device may also refer to devices that have simi...

AI Technical Summary

Benefits of technology

The patent text discusses systems and methods for wireless devices to communicate with networks and change cells during a cell change. The technical effect of the patent is to improve the accuracy of estimating the resource allocation needed for a wireless device to finish data transfer during a cell change, and to reduce the delay in data transfer during a cell change. This is achieved by incorporating a system for coordinating communications during a wireless device's changing of cells in a network.

Problems solved by technology

Regardless of the particular protocols utilized, while performing a “Cell Reselection,” there is typically a delay in packet data transfer, as some amount of time is used to perform switching and signaling operations in the new cell.

In the case where a wireless device is in the process of a data transfer during a Cell Reselection, the delay can be readily appreciable by the user because the data transfer may be interrupted and delayed.

This situation can be particularly prevalent because the network may assist or control the cell change, but is not aware of the amount of data that the wireless device wants to transmit.

However, if the rough estimate by the network is incorrect or insufficient, there may still be a user-perceivable delay.

This accuracy of the estimate may be very low because the network has very little information (especially at the entity such as the BSS which determines when to trigger cell change) on which to base its estimate.

The transmission of these (and other control messages) may reduce the available resources for sending RLC data blocks.

Images