Pulse or digital communications – Transmitters
Reexamination Certificate
2007-10-30
2007-10-30
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Transmitters
C375S316000, C375S259000
Reexamination Certificate
active
10680122
ABSTRACT:
To perform link adaptation at radio interfaces of an enhanced packet data cellular network the system behavior is simulated for different C/I conditions. Two sets of tables are obtained, each table including upgrade and downgrade thresholds expressed in terms of Block Error Rate (BLER). The tables are specialized for taking into account EGPRS type II hybrid ARQ, Incremental Redundancy (IR). Transmitted blocks are checked for FEC and results are sent to the network that continuously updates BLER. A reliability filter output is used to decide the weight between new and old measurements. IR efficiency is tested for each incoming block and an indicative variable IR_status is filtered. Each threshold of BLER to be used is obtained by linear interpolation between the tabulated threshold without IR and with perfect IR, both weighed with filtered IR_status. Filtered BLER is compared with interpolated thresholds for testing the incoming of a MCS switching condition.
REFERENCES:
patent: 5764699 (1998-06-01), Needham et al.
patent: 6208663 (2001-03-01), Schramm et al.
patent: 6823005 (2004-11-01), Chuang et al.
patent: 6865233 (2005-03-01), Eriksson et al.
patent: 2002/0036992 (2002-03-01), Balachandran et al.
patent: 0 903 883 (1999-03-01), None
patent: WO 01/43333 (2001-06-01), None
Introduction to probability ans statistics for engineers and scientists; XP002180737; pp. 426 and 427; Sheldon M Ross.
Ghebretinsae Temesghen
Torres Juan Alberto
LandOfFree
Method of link adaptation in enhanced cellular systems to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of link adaptation in enhanced cellular systems to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of link adaptation in enhanced cellular systems to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3841202