Sony Ericsson W995 Troubleshooting Manual page 99

FUNCTIONAL OVERVIEW
SEMC Troubleshooting Manual
W995
WLAN device or BT device gets the antenna is Packet Traffic Arbitration (PTA). WLAN LD
configures the PTA during startup of the WLAN device. All PTA parameters are stored in
GDFS. The PTA is configured to prioritize BT traffic if it is a BT high request. All WLAN
traffic should have priority before any BT traffic that is categorized as BT low requests.
WLAN Driver sends status events to BT Driver to inform about:
• WLAN startup and shutdown
• WLAN association and disassociation
• The current WLAN channel in use
In the cases of WLAN startup and shutdown the BT Logical Driver configures the BT Device
to request the antenna from PTA or not. BT LD also monitors if WLAN have any connection
running. In that case, BT avoids the BT frequencies mapping to the WLAN channel. WLAN
monitors if BT has started any BT Inquiry or page. If this happens any link loss
mechanisms should be temporary turned off for the BT Inquiry or page period.
Bluetooth and WLAN PTA Mechanism:
Bluetooth and WLAN Chip 3-wire Interface:
1230-1858 rev. 1 99 (125)