Method and system for integrated link adaptation and power control to improve error and throughput performance in wireless packet networks
First Claim
Patent Images
1. A method comprising:
- determining a packet error rate for packet transmissions received from a group of wireless terminals in a cell, the group being one of a plurality of groups of wireless terminals in the cell, a total number of groups of the plurality of groups being based on a number of available modulation levels; and
updating a modulation level of a wireless terminal of the group of wireless terminals based on a target packet error rate and the packet error rate, the group including the wireless terminal, each of the wireless terminals in the group having a signal path gain within a first range of signal path gains, the first range being one of a plurality of non-overlapping intervals of a range of signal path gains for the wireless terminals.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a system that implements an algorithm for integrated link adaptation and power control to achieve specified error rates and to improve an overall throughput for real-time applications in wireless packet networks. The system initially divides wireless terminals into groups according to their signal path gains. Afterwards, the system can periodically adapt transmissions (i.e., link adaptations) based on the required error rates, actual error statistics and average transmission power for each wireless terminal group. Furthermore, transmission power can be adjusted by an enhanced Kalman-filter method to ensure successful reception.
-
Citations
13 Claims
-
1. A method comprising:
-
determining a packet error rate for packet transmissions received from a group of wireless terminals in a cell, the group being one of a plurality of groups of wireless terminals in the cell, a total number of groups of the plurality of groups being based on a number of available modulation levels; and updating a modulation level of a wireless terminal of the group of wireless terminals based on a target packet error rate and the packet error rate, the group including the wireless terminal, each of the wireless terminals in the group having a signal path gain within a first range of signal path gains, the first range being one of a plurality of non-overlapping intervals of a range of signal path gains for the wireless terminals. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus comprising:
-
an antenna; and a controller configured to update a modulation level of a wireless terminal in a cell based on a target packet error rate and a packet error rate determined based on packet transmissions received using the antenna from a group of wireless terminals in the cell, the group including the wireless terminal, each of the wireless terminals in the group having a signal path gain within a first range of signal path gains, the first range being one of a plurality of non-overlapping intervals of a range of signal path gains for the wireless terminals, the group being one of a plurality of groups of wireless terminals in the cell, a total number of groups of the plurality of groups being based on a number of available modulation levels. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
Specification