Commit Graph

2155 Commits

Author SHA1 Message Date
Ivan Kluchnikov 34460b8407 Modified encoding of Packet Downlink Assignment and Packet Uplink Ack/Nack messages.
Removed hand-coding of RLC/MAC Control messages, now we use structures and encode_gsm_rlcmac_downlink() function for encode control blocks.
2012-06-27 18:41:04 +04:00
Andreas Eversberg 5dac2f09e1 Work on RLCMAC layer. Integration of scheduler and new packet transfer 2012-06-27 15:52:04 +02:00
Andreas Eversberg 66690dd3c6 Rewrite of RLC/MAC uplink acknowledged TBF.
It uses history buffer and sends ack/nack control messages about received
blocks. It defragments the blocks and forwards them to upper layer. It
does content resolution and ignores other MS. It sends final ACK after
all blocks have been sucessfully received. Timers are used to detect
loss of uplink, and repeat lost final ACK.
2012-06-27 15:44:31 +02:00
Andreas Eversberg 39621c41f3 Introducing scheduler to process transmission of blocks
The scheduler is triggered at ready-to-send-requesst. It schedules
control blocks, data block and dummy blocks, depending on priority.

It provides upstream ressource by setting USF. The ressources are
assigned, if required. The ressources are dispatched round-robin.

In case of polling, the upstream ressource is given to MS at the
time it will respond to polling request.
2012-06-27 15:36:27 +02:00
Ivan Kluchnikov d78ee73623 Fixed Downlink TBF Establishment on CCCH.
UL TBF should be released before DL TBF establishment on CCCH.
Added delay after transmitting Immediate Assignment.
2012-06-26 19:33:44 +04:00
Ivan Kluchnikov cf7b3a529f Merge branch 'jolly'
Merged jolly branch with master, fixed conflicts.
2012-06-26 16:54:22 +04:00
Andreas Eversberg 7d7cf54f39 Packet Downlink Assigment now uses ARFCN/TN of current BTS layout
Now the MS receives dowlink LLC frames.
2012-06-25 09:26:15 +02:00
Andreas Eversberg 055340801b Fixed IMM.ASS message
Now packets are reassembled correctly.
2012-06-24 11:46:49 +02:00
Andreas Eversberg fe411b3cfd Hack to slow down uplink transfer 2012-06-23 19:35:56 +02:00
Andreas Eversberg 0aed654ac7 Split of L1 interface to be used with OpenBTS or sysmo-BTS
The OpenBTS socket functions are moved from main to pcu_l1_if.cpp.

New sysmo_l1_if.cpp is introduced. It used special unix socket interface
to connect to sysmo-BTS. This is required to access CCCH/RACH and info
about cell layout. Traffic is also forwarded via this interface, but
it direct access of L1 baseband DSP will be added soon.

In order to handle ready-to-send requests above l1_if, the transmit
queue (for downlink blocks) is moved to gprs_rlcmac.cpp.

The TBF instance additionally holds TRX and TS info, but this is only
a hack currently. TBF instance requires more details about allocated
ressources in the future.
2012-06-23 10:33:16 +02:00
Andreas Eversberg f6b7ca5dd4 Adding more OpenBSC object files to
This is required, so it works in my environment. Might be revised soon.
2012-06-23 10:17:07 +02:00
Harald Welte 477e79e67e remove dependencies to openbsc/osmoggsn internals
...and link against libosmogb (part of libosmocore.git)
2012-06-18 12:22:18 +08:00
Ivan Kluchnikov a9e6dc5084 Improvement of TBF management.
Added functions for TBF allocation, establishment, data transfer and release management.
Modified TBF structure, added list for several LLC PDUs in one TBF.
Added function gprs_rlcmac_tx_llc_pdus() providing transmission of several LLC PDUs in one TBF to MS.
2012-06-17 08:30:06 +04:00
Ivan Kluchnikov 9b06ff0c4c Removed all size_t variables. Fixed type of readIndex and writeIndex variables.
We use unsigned int type for readIndex and writeIndex parameters in bitvec_read_field() and bitvec_write_field() functions.
2012-06-15 10:13:30 +04:00
Ivan Kluchnikov 856221fd3d Removed all OpenBTS dependencies. We don't use OpenBTS cout and gsmtap anymore. 2012-06-15 09:31:29 +04:00
Harald Welte 40383dcb46 Don't link lots of openbsc / sgsn / ggsn internal .o files
this is probably a historic relict.  None of them should be used, and I
cannot see any actual use of them either.

The only non-library code that we link now is libosmo-gb (ns/bssgp),
which soon will be turned into a real library.
2012-06-14 21:15:59 +08:00
Harald Welte 57f6b0220f Add auto-foo (partial cleanup, master makefile/ 2012-06-14 21:05:44 +08:00
Harald Welte 57875a99ac add .gitignore file 2012-06-14 21:05:16 +08:00
Harald Welte c5187a1824 move everything to src/ subdirectory
The code corresponds to commit a9aa4777cc1144897a77dfb6c5c3d7325705251e
in openbts-p2.8.git (Tue Jun 12 18:14:49 2012 +0400)
2012-06-14 20:48:42 +08:00
Ivan Kluchnikov 6347711736 Fixed gprs_rlcmac_rcv_data_block() function.
Countdown Value = 0 means, that PCU received the last data block in TBF and we should ignore all next data blocks.
2012-06-12 18:14:49 +04:00
Ivan Kluchnikov 5e0df9354b Fixed parsing of BSSGP DL-UNITDATA in gprs_bssgp_pcu_rx_dl_ud() function. 2012-06-12 15:33:52 +04:00
Ivan Kluchnikov 2f69acd0ed Modified gprs_rlcmac_data_block_parse() function.
Implemented singular case of using Length Indicator field, which described in 10.4.14 TS 44.060.
2012-06-12 12:42:16 +04:00
Ivan Kluchnikov b172b1b18d Fixed handling of LLC-PDU Length Indicator.
Added implementation of Length Indicator, which consists of two octets.
2012-06-07 01:51:49 +04:00
Ivan Kluchnikov e3594236ff Modified gprs_rlcmac_segment_llc_pdu() and gprs_rlcmac_tx_dl_data_block() functions.
Changed the internal logic of the functions. Implemented singular case of using Length Indicator field, which described in 10.4.14 TS 44.060.
2012-06-07 01:12:29 +04:00
Ivan Kluchnikov bceb3fbf29 Modified gprs_rlcmac_data_block_parse() function.
Changed the internal logic of the function. Fixed handling for case with several LLC PDU in one data block.
2012-06-05 16:56:27 +04:00
Ivan Kluchnikov b2b8100499 Fixed gprs_rlcmac_rcv_data_block() and gprs_rlcmac_data_block_parse() functions.
Added handling for cases with several LLC PDU in one data block and several LLC PDU in one TBF.
2012-06-04 21:57:02 +04:00
Ivan Kluchnikov c5d8c27513 Fixed maximum length of LLC frame. 2012-06-04 21:55:02 +04:00
Ivan Kluchnikov 3fa42b21ee Fixed length of BSSGP header. 2012-06-04 19:07:25 +04:00
Ivan Kluchnikov 9c795abac8 Changed Downlink TBF Establishment.
We don't use TBF establishment on CCCH and Immediate Assignment message any more, now we establish Downlink TBF during Uplink TBF and use Packet Downlink Assignment message.
Added function gprs_rlcmac_packet_downlink_assignment() and modified TBF management.
2012-05-24 23:12:59 +04:00
Ivan Kluchnikov 0b450c19e7 Modified write_packet_downlink_assignment function.
Added timeslot number, timing advance and TSC parameters. Changed structure of Packet Downlink Assignment message.
2012-05-24 22:47:12 +04:00
Ivan Kluchnikov a21f275035 Fixed RLC/MAC downlink block data length and gprs_rlcmac_tx_dl_data_block function. 2012-05-24 22:35:19 +04:00
Ivan Kluchnikov a9f1ff2b64 Modified PCU debugging/logging system. Now we use functions from osmocom logging system. 2012-05-24 22:25:06 +04:00
Ivan Kluchnikov 6043718c73 Added PCU debugging/logging support code based on osmocom logging system. 2012-05-24 22:07:15 +04:00
Ivan Kluchnikov 835f91e8f8 We don't use OpenBTS bit vectors in PCU anymore. All OpenBTS bit vectors are replaced by Osmocom bit vectors. 2012-04-30 18:00:36 +04:00
Ivan Kluchnikov 962f97b21c Additional functions for Osmocom bit vector abstraction. 2012-04-30 17:51:23 +04:00
Ivan Kluchnikov 5310d4542c L1 Interface (PCU side): Added functions for handling PhConnectInd and PhRaInd primitives.
Added functions for writing and sending Immediate Assignment message.
Modified TBF managment for handling Channel Request and Immediate Assignment  messages.
2012-04-17 22:00:31 +04:00
Ivan Kluchnikov 27482ba371 Added structure for GsmL1_PhConnectInd_t primitive. 2012-04-17 20:36:44 +04:00
Ivan Kluchnikov 192e9c1b67 Fixed: wrong sizeof value for malloc(). 2012-04-12 15:27:39 +04:00
Ivan Kluchnikov 61a33f7c7a Added support of osmo_timers and osmo_gsm_timers for TBF. 2012-04-12 15:22:06 +04:00
Ivan Kluchnikov ff447cdf89 Added gsm_timer.h and gsm_timer.cpp files to 2012-04-12 15:16:23 +04:00
Ivan Kluchnikov 657856279b Added GSM timer handling routines. GSM timer is the same as osmo_timer, but it uses frame numbers instead of seconds. 2012-04-12 14:49:02 +04:00
Ivan Kluchnikov 4277f0cdbc L1 Interface (PCU side): Added function for handle phReadyToSendInd primitive. Added variable and functions for storage current FN. 2012-04-12 14:24:35 +04:00
Ivan Kluchnikov 8b0e8e3951 Changed parameters for Downlink Immediate Assignment Rest Octets.
We shouldn't use TBF Starting time.
2012-04-11 22:33:37 +04:00
Ivan Kluchnikov 74b459fda4 Fixed: We should use guint8 array instead of guint32 and guint64 variables for decoding and encoding CSN1 bitmap. 2012-04-11 22:02:15 +04:00
Ivan Kluchnikov 1efac073e8 Fixed: endif statement is missed in gsmL1prim.h. 2012-04-11 21:39:53 +04:00
Ivan Kluchnikov e3a059656f Added L1 interface between PCU and OpenBTS for communication (PCU side). 2012-03-18 15:48:51 +04:00
Ivan Kluchnikov c320d86052 Fixed bugs in handling of TBFs. 2012-03-18 15:04:48 +04:00
Ivan Kluchnikov 8ee6051b72 Separation of GPRS PCU application from main OpenBTS code and changing PCU architecture (First step).
1. pcu - main program for  GPRS PCU.
2. gprs_rlcmac - RLC/MAC layer implementation for PCU. Added list for TBF, TBF allocation, establishment, release.
3. gprs_bssgp_pcu - BSSGP protocol implementation for PCU.
4. pcu_l1_if - interface for communication PCU application with OpenBTS.
2012-03-05 19:24:57 +04:00
Ivan Kluchnikov 3450640624 Added packet uplink and downlink assignment, packet uplink ack, RLC/MAC Data and Control blocks dispatchers, gsmtap support for LLC PDUs. 2012-02-20 15:24:16 +04:00
Ivan Kluchnikov 8aa4c52d2e Added segmentation of LLC PDUs into RLC data blocks. 2012-02-20 15:15:12 +04:00