diff options
Diffstat (limited to 'openbsc/doc/gprs.txt')
| -rw-r--r-- | openbsc/doc/gprs.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/openbsc/doc/gprs.txt b/openbsc/doc/gprs.txt new file mode 100644 index 000000000..3c56fa6ac --- /dev/null +++ b/openbsc/doc/gprs.txt @@ -0,0 +1,46 @@ +01.61 GPRS cipher algorithm requirements +03.60 Overall GRPS logical architecture (above RL and MAC) +03.64 GPRS radio interface +04.60 RLC/MAC on PDCH +04.64 MS-SGSN LLC spec (on top of RLC/MAC) +04.65 SGSN SNDCP +08.14 BSS SGSN Gb Layer 1 +08.16 BSS SGSN Gb Layer 2 +08.18 BSS SGSN BSS GPRS protocol +09.95 Interworking between modified PLMN supporting legacy GPRS and GPRS mobiles +22.060 GPRS Service Spec +23.060 GPRS Radio Service Spec +29.016 SGSN - VLR Interface Gs network interface spec +29.018 SGSN - VLR Interface Gs layer3 interface spec +29.060 GPRS Tunneling (GTP) over Gn and Gp + + + +Stack in case of nanoBTS, when HTTP request is transferred from MS: + +HTTP +TCP +PPP +SNDCP +LLC +BSSGP +NS +UDP +IP +Ethernet + + +Identities: +IMSI SIM identity +P-TMSI allocated to each GPRS-attached MS +TLLI unambiguously identifies the logical link +NSAPI identifies PDP context associated with PDP address + MS selects unused NSAPI while PDP ctx activation +NSAPI+TLLI NSAPI+TLLI pair is unique within RA + + +TLLI address ranges +local derived from the P-TMSI allocated by the SGSN, valid only in one RA +foreign derived from the P-TMSI allocated in another RA +random used when MS has no P-TMSI availaible +auxiliary selected by SGSN used for anonymous access MM+PDP ctx |