Seung C Baek

US Patent:

8169969, May 1, 2012

Filed:

Jun 18, 2008

Appl. No.:

12/141439

Inventors:

Ramanuja Vedantham - Dallas TX, US
Sandeep Bhadra - Dallas TX, US
Shantanu Kangude - Dallas TX, US
Seung Baek - Richardson TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04W 4/00

US Classification:

370331, 455436

Abstract:

This invention employs an inherent tradeoff in a radio bearer dependent data handling method for intra-E-UTRA handoffs. For user equipment using real time data, the source node forwards to the target node not yet acknowledged real time service data units and disconnects. This makes the handoff latency short at the expense of data traffic between nodes. For user equipment not needing real time data, the source node continues to receive user equipment acknowledgements during a time out period and only forwards service data units acknowledged during the time out period. This reduces X2 interface traffic between the source and target nodes but extends the handoff latency.

US Patent:

20140211755, Jul 31, 2014

Filed:

May 1, 2012

Appl. No.:

13/461758

Inventors:

Ramanuja Vedantham - Dallas TX, US
Sandeep Bhadra - Dallas TX, US
Shantanu Kangude - Dallas TX, US
Seung Baek - Richardson TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04W 36/24

US Classification:

370331

Abstract:

This invention employs an inherent tradeoff in a radio bearer dependent data handling method for intra-E-UTRA handoffs. For user equipment using real time data, the source node forwards to the target node not yet acknowledged real time service data units and disconnects. This makes the handoff latency short at the expense of data traffic between nodes. For user equipment not needing real time data, the source node continues to receive user equipment acknowledgements during a time out period and only forwards service data units acknowledged during the time out period. This reduces X2 interface traffic between the source and target nodes but extends the handoff latency.