Trouble Shooting Guide
Table Of Contents
- Troubleshooting-Installing an RF link
- Issue : 5.3.x
- Authors : Matt Olson/Dave Sida
- Date : 30th July 2004
- CONTENTS
- CHANGE HISTORY
- INTRODUCTION
- Aligning an SU
- Fine tuning an SU
- SU signal quality
- Troubleshooting SU link from AP
- Link status
- AP Link Status
- SU Link Status
- MAC type
- Unit MAC address
- Channel
- Radio Channel Mask
- Correlation sequence
- MAC delay compensation
- Unit Range
- Base Station ID
- Radio Temperature
- RSSI
- Path loss in excess of FSL (estimate)
- Downlink RSSI Fade Margin
- TX maximum backoff
- TX current backoff
- Max TX power for channel
- Actual TX power
- Averaging MAC error rates over
- Downlink Header Error Rate
- Downlink Cell Error Rate
- Uplink Cell Error Rate
- Modem RSSI
- Mac stats
- Modem txpower
- Modem mmse
- PNMS Sector
- Survey Scan
- Modem msreg 6 1
- Modem rxdc stats
- Bun list channels
Axxcelera Broadband
Troubleshooting-Installing an RF link - 25 - Issue: 5.3.x
Rev 2
ticks UTOPIA interface # of 20 mS ticks since last received…
Utopia tx UTOPIA interface # of ticks since the last cell was transmitted from the UTOPIA interface (to the
air interface)
Utopia rx UTOPIA interface # of ticks since the last cell was received at the UTOPIA interface (from the air
interface)
FDHDR RXOK UTOPIA interface # of ticks since the last FDHDR was received OK from the air interface
Free list UTOPIA interface Relates to internal pointers, and is not relevant to this document.
Head UTOPIA interface Relates to internal pointers, and is not relevant to this document.
Tail UTOPIA interface Relates to internal pointers, and is not relevant to this document.
Delta UTOPIA interface Relates to internal pointers, and is not relevant to this document.
Interpreting AP MAC Stats
9.1.1 FDHDR
FDHDR stands for Frame Description Header. These are only transmitted from an AP, and are received by
all SUs in the sector.
9.1.1.1 RX
FDHDR RX counter should not increment on an AP. However, some receive errors cannot be correctly
identified by the AP, and as a result the FDHDR RXOK counter is incremented. The FDHDR RXOK
count therefore represents errors. The AP MAC cannot decode FDHDRs, so this count does not mean that
FDHDRs are being received.
9.1.1.2 TX
This is the number of FDHDR transmitted since the MAC stats were last reset. The FDHDR TX count
should increase by about 10,000 per second, but it depends on the traffic loading and the type of MAC used
(i.e. 5.6km, 8.0km or 11.4km).
9.1.2 RGR
Reservation (Grant) Request (Rx) / Reservation (Grant) Request Acknowledgement (Tx)
9.1.2.1 RX
Reservation Request received from an SU. This is one method the SU can use to request upstream
bandwidth. (The other method is to piggy-back requests on to cells sent upstream. Piggy-backed requests
do not appear in the MAC stats).
9.1.2.2 TX
Reservation Request Acknowledgment sent to an SU, in response to receiving a Reservation Request from
that SU. Upstream bandwidth may be granted to the SU in the same frame, but doesn’t have to be.
9.1.3 ACK
(Cell) Acknowledgement
9.1.3.1 RX