Implemented Paging procedure on CCCH.
Added functions:
- gprs_bssgp_pcu_rx_paging_ps() for handling paging message from BSSGP;
- write_paging_request() for writing paging request message;
- gprs_rlcmac_paging_request() and pcu_l1if_tx_pch() for sending paging request message to BTS.
diff --git a/src/gprs_rlcmac.cpp b/src/gprs_rlcmac.cpp
index 17120f9..711fb61 100644
--- a/src/gprs_rlcmac.cpp
+++ b/src/gprs_rlcmac.cpp
@@ -718,6 +718,35 @@
return wp/8;
}
+int write_paging_request(bitvec * dest, uint8_t *ptmsi, uint16_t ptmsi_len)
+{
+ unsigned wp = 0;
+
+ bitvec_write_field(dest, wp,0x0,4); // Skip Indicator
+ bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator
+ bitvec_write_field(dest, wp,0x21,8); // Paging Request Message Type
+
+ bitvec_write_field(dest, wp,0x0,4); // Page Mode
+ bitvec_write_field(dest, wp,0x0,4); // Channel Needed
+
+ // Mobile Identity
+ bitvec_write_field(dest, wp,ptmsi_len+1,8); // Mobile Identity length
+ bitvec_write_field(dest, wp,0xf,4); // unused
+ bitvec_write_field(dest, wp,0x4,4); // PTMSI type
+ for (int i = 0; i < ptmsi_len; i++)
+ {
+ bitvec_write_field(dest, wp,ptmsi[i],8); // PTMSI
+ }
+ bitvec_write_field(dest, wp,0x0,1); // "L" NLN(PCH) = off
+ bitvec_write_field(dest, wp,0x0,1); // "L" Priority1 = off
+ bitvec_write_field(dest, wp,0x1,1); // "L" Priority2 = off
+ bitvec_write_field(dest, wp,0x0,1); // "L" Group Call information = off
+ bitvec_write_field(dest, wp,0x0,1); // "H" Packet Page Indication 1 = packet paging procedure
+ bitvec_write_field(dest, wp,0x1,1); // "H" Packet Page Indication 2 = packet paging procedure
+ bitvec_write_field(dest, wp,0x3,2); // spare padding
+ return wp/8;
+}
+
void write_packet_uplink_ack(RlcMacDownlink_t * block, uint8_t tfi, uint32_t tlli, uint8_t fi, uint8_t bsn)
{
// Packet Uplink Ack/Nack TS 44.060 11.2.28
@@ -1158,3 +1187,12 @@
bitvec_free(packet_downlink_assignment_vec);
}
+void gprs_rlcmac_paging_request(uint8_t *ptmsi, uint16_t ptmsi_len)
+{
+ LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Paging Request (CCCH)\n");
+ bitvec *paging_request = bitvec_alloc(23);
+ bitvec_unhex(paging_request, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
+ int len = write_paging_request(paging_request, ptmsi, ptmsi_len);
+ pcu_l1if_tx_pch(paging_request, len);
+ bitvec_free(paging_request);
+}