Downlink Efficiency


We are just starting out and the network has been live for about a week. We have a total of 8 customers on 5 access points around town. Out of those 8 links, all are getting 91% downlink efficiency and 100% uplink efficiency.

We are using 5.7 Cyclone Access points. And 5.2 motorola backhaul links. There is another wisp in town, but they are using 2.4 Alvarion and wired backhauls to their NOC.

What I know…

Spectrum analysis looks clean to me on all links.

The statistics below are of our best link - rssi/jitter wise.

Link Test:
Stats for LUID: 5 Test Duration: 2
Downlink RATE: 4085760 bps
Uplink RATE: 1136640 bps
Downlink Efficiency: 91 Percent
Max Downlink Index: 100
Actual Downlink Index: 91
Expected Frag Count: 15960
Actual Frag Count: 17362
Uplink Efficiency: 100 Percent
Expected Frag Count: 4440
Actual Frag Count: 4440

RSSI 1143   (-65 dBm)
Jitter 1
Air Delay 42 (approximately 0.39 miles (2058 feet))

LUID: 005 : MAC: 0a-00-3e-f1-16-da State: IN SESSION (Encrypt Active)
      Site Name : Business park
      Software Version : CANOPY4.2.1 Apr 16 2004 15:23:05
      Software Boot Version : CANOPYBOOT 2.5
      FPGA Version : 062403 (DES)
      Session Timeout: 19, AirDelay 42
      Session Count: 22, Reg Count 13, Re-Reg Count 15
      RSSI (Avg/Last): 1169/1175   Jitter (Avg/Last): 2/2   Power Level (Avg/Last): -59/-59

What tests should I perform to help pin point the cause of this?


Joe Falaschi

are you using a CMM to sync your modules?? do you have more than 2 APs on the same tower in the same band? i have noticed that i can get away with having 3 APs on the same tower, 2 5.7, 1 2.4, with not CMM and a different brand of BH, and not have any Re-register problems, but on another tower with 3 2.4 APs, and a 5.7BH, almost all of my SMs have Re-registers issues. hope this helps, oh, about to get a CMM micro, they say it will fix this.