BSSLAP
http://webapp.etsi.org/key/queryform.asp 3GPP TS 08.71
BSSLAP defines the SMLC-BSS layer 3 protocol . The following Location Services related messages are exchanged between the SMLC and the BSS, with the VMSC acting as a relay.
On the A interface the messages are contained in the Location Information IE which is encapsulated in the BSSMAP-LE Connection Oriented Information message as specified in 3GPP TS 08.08. On the Ls interface the messages are contained in the Location Information IE which is encapsulated in the BSSMAP-LE Connection Oriented Information message as specified in 3GPP TS 09.31.
The following messages types are available:
| Message | Encoding |
|---|---|
| Reserved | 00000000 |
| TA Request | 00000001 |
| TA Response | 00000010 |
| TOA Request | 00000100 |
| TOA Response | 00000101 |
| Reject | 00001010 |
| Reset | 00001011 |
| Abort | 00001100 |
| TA LAYER3 | 00001101 |
| MS Position Command | 00001111 |
| MS Position Response | 00010000 |
Read more about this topic: Cellular Data Communication Protocol