osmocom-net-gprs April 2016

osmocom-net-gprs@lists.osmocom.org

12 participants
18 discussions

[PATCH] Update parameters in osmo-bts for 11 bit RACH
by Bhargava Abhyankar 12 Apr '16

12 Apr '16

Based on the indication from L1, number of bits in RACH and burst type is determined. Appropriate parameters are filled in osmo-bts. These parameters are sent to osmo-pcu for processing of the RACH. --- src/osmo-bts-sysmo/l1_if.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c index a8f957c..1aec989 100644 --- a/src/osmo-bts-sysmo/l1_if.c +++ b/src/osmo-bts-sysmo/l1_if.c @@ -857,7 +857,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, struct gsm_lchan *lchan; struct osmo_phsap_prim *l1sap; uint32_t fn; - uint8_t ra, acc_delay = 0; + uint16_t ra, acc_delay = 0, is_11bit = 0, burst_type = 0; int rc; /* increment number of busy RACH slots, if required */ @@ -879,16 +879,25 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, btsb->load.rach.access++; dump_meas_res(LOGL_DEBUG, &ra_ind->measParam); + burst_type = ra_ind->burstType; - if (ra_ind->msgUnitParam.u8Size != 1) { + if ((ra_ind->msgUnitParam.u8Size != 1) && + (ra_ind->msgUnitParam.u8Size != 2)) { LOGP(DL1C, LOGL_ERROR, "PH-RACH-INDICATION has %d bits\n", ra_ind->sapi); msgb_free(l1p_msg); return 0; } + if (ra_ind->msgUnitParam.u8Size == 2) { + is_11bit = 1; + memcpy(&ra, ra_ind->msgUnitParam.u8Buffer, 2); + } else { + is_11bit = 0; + ra = ra_ind->msgUnitParam.u8Buffer[0]; + } + fn = ra_ind->u32Fn; - ra = ra_ind->msgUnitParam.u8Buffer[0]; rc = msgb_trim(l1p_msg, sizeof(*l1sap)); if (rc < 0) MSGB_ABORT(l1p_msg, "No room for primitive data\n"); @@ -898,11 +907,8 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, l1sap->u.rach_ind.ra = ra; l1sap->u.rach_ind.acc_delay = acc_delay; l1sap->u.rach_ind.fn = fn; - - /* Initialising the parameters needs to be handled when 11 bit RACH - * is supported */ - l1sap->u.rach_ind.is_11bit = 0; - l1sap->u.rach_ind.burst = GSM_L1_BURST_TYPE_ACCESS_0; + l1sap->u.rach_ind.is_11bit = is_11bit; /* no of bits in 11 bit RACH */ + l1sap->u.rach_ind.burst = burst_type; /* type of burst */ if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) @@ -911,6 +917,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, l1sap->u.rach_ind.chan_nr = gsm_lchan2chan_nr(lchan); return l1sap_up(trx, l1sap); + } /* handle any random indication from the L1 */ -- 2.5.0

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[PATCH] Add compression algorithm based on T.4 procedure
by sangamesh sajjan 12 Apr '16

12 Apr '16

This patch includes the changes for compression algorithm and the compression is carried out using T.4 run length coding and the code words used are based on 3GPP 44.060 --- include/osmocom/core/bitcomp.h | 7 +++ src/bitcomp.c | 129 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 136 insertions(+) diff --git a/include/osmocom/core/bitcomp.h b/include/osmocom/core/bitcomp.h index 89eccbc..c5c223c 100644 --- a/include/osmocom/core/bitcomp.h +++ b/include/osmocom/core/bitcomp.h @@ -39,4 +39,11 @@ int osmo_t4_encode(struct bitvec *bv); int osmo_t4_decode(const struct bitvec *in, bool cc, struct bitvec *out); +#define MOD64(X) ((X + 64) & 0x3F) +int osmo_bitmap_compress( + struct bitvec *rbb_vec, + uint16_t *ucmp_bmplen, //Uncompressed bitmap len + uint8_t *cmp_bmplen, //Compressed bitmap len + uint8_t *crbb_bitmap //Compressed bitmap + ); /*! @} */ diff --git a/src/bitcomp.c b/src/bitcomp.c index bf35927..f3326b2 100644 --- a/src/bitcomp.c +++ b/src/bitcomp.c @@ -476,5 +476,134 @@ int osmo_t4_encode(struct bitvec *bv) } return -1; } +void compress_bitmap( + uint16_t *run_len_cnt, /* cnt: run length count */ + uint16_t *codewrd_bitmap, /* code word */ + uint8_t *codewrd_len, /* number of bits in the code word */ + uint8_t *cbmbuf, /* bitmap buffer to put code word in */ + uint16_t *cstrtbits, /* start bits to put codeword. start from + * 0, the first bit in the first octets + * and increment without octets + * consideration. i.e. can be more than 7. + */ + uint8_t *cstrtocts, /* start octets to put codeword. start from 0*/ + uint8_t clr_code) +{ + int i = 0; + uint16_t bitsleft = 0; + uint16_t temp = 0; + *codewrd_bitmap = 0; + *codewrd_len = 0; + + if ((*run_len_cnt) >= 64) { + for (i = 0; i < 15; i++) { + if (t4_make_up_ind[i] == *run_len_cnt) { + *codewrd_bitmap = t4_make_up[clr_code][i]; + *codewrd_len = t4_make_up_length[clr_code][i]; + } + } + } else { + *codewrd_bitmap = t4_term[clr_code][*run_len_cnt]; + *codewrd_len = t4_term_length[clr_code][*run_len_cnt]; + } + bitsleft = *codewrd_len; + /* Move the codeword_bitmap to left in two bytes*/ + (*codewrd_bitmap) = (*codewrd_bitmap)<<(16-(*codewrd_len)); + + while (bitsleft != 0) { + /* Bring left most bits to right and start shifting by cstrtbits, + * we get each bit to update in compressed buffer + */ + temp = (((*codewrd_bitmap) & 0x8000)>>15)<<(7-(*cstrtbits)); + cbmbuf[*cstrtocts] = cbmbuf[*cstrtocts]|temp; + + (*codewrd_bitmap) = (*codewrd_bitmap)<<1; + (*cstrtbits)++; + bitsleft--; + if ((*cstrtbits) >= 8) { + (*cstrtbits) = (*cstrtbits)-8; + (*cstrtocts)++; + /* init buf */ + cbmbuf[*cstrtocts] = 0x00; + } + } +} + +int osmo_bitmap_compress( + struct bitvec *rbb_vec, + uint16_t *ucmp_bmplen, /* Uncompressed bitmap len */ + uint8_t *cmp_bmplen, /* Compressed bitmap len */ + uint8_t *crbb_bitmap /* Compressed bitmap */ + ) +{ + char run_len_bit; + int buflen = *ucmp_bmplen; + uint16_t rlen; + uint16_t temprl = 0; + uint16_t cbmap; /* Compressed code word */ + uint8_t nbits; /* Length of code word */ + uint16_t cstrtbits = 0; + uint8_t cstrtocts = 0; + uint16_t uclen = 0; + uint8_t clen = 0; + uint8_t clr_code = 0; + + run_len_bit = (rbb_vec->data[0] & 0x80)>>7; + while (buflen > 0) { + temprl = 0; + /* Find Run length */ + if (run_len_bit == 1) + rlen = bitvec_rl(rbb_vec, true); + else + rlen = bitvec_rl(rbb_vec, false); + + buflen = buflen - rlen; + /* if rlen> 64 need 2 code words */ + //Compress the bits + if (run_len_bit == 0) { + if (rlen >= 64) { + temprl = (rlen/64)*64; + compress_bitmap(&temprl, &cbmap, &nbits, + crbb_bitmap, &cstrtbits, + &cstrtocts, clr_code); + } + temprl = MOD64(rlen); + compress_bitmap(&temprl, + &cbmap, &nbits, crbb_bitmap, + &cstrtbits, &cstrtocts, clr_code); + + /* next time the run length will be Ones */ + run_len_bit = 1; + } else { + if (rlen >= 64) { + temprl = (rlen/64)*64; + clr_code = 1; + compress_bitmap(&temprl, &cbmap, + &nbits, crbb_bitmap, + &cstrtbits, &cstrtocts, + clr_code); + } + temprl = MOD64(rlen); + compress_bitmap(&temprl, &cbmap, + &nbits, crbb_bitmap, + &cstrtbits, &cstrtocts, clr_code); + + /* next time the run length will be Zeros */ + run_len_bit = 0; + } + uclen = uclen + (rlen); + clen = clen + nbits; + } + *cmp_bmplen = clen; + if (clen >= uclen) { + /* No Gain is observed, So no need to compress, copy original + * bitmap in uncompressed bitmap + */ + return 0; + } else { + /* Add compressed bitmap to final buffer */ + return 1; + } +} -- 1.7.9.5

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RE: Regarding integration of NURAN L1 1.0
by Prasad Kaup 11 Apr '16

11 Apr '16

Hello, Thanks for your inputs. We are starting integration of NURAN 1.0 for CS , SMS and GPRS/ EGPRS. We would like to know the steps to bring up the board with all software elements . We understand that osmo-bts/osmo-pcu and osmo-bsc will be cross compiled. As a first step we would like to know the details of cross compilation and tool chain to be used for osmo-bts / osmo-pcu and osmo-bsc . Also in the test setup described at http://openbsc.osmocom.org/trac , we see that there are third party components like MSC , SGSN and GGSN mentioned. Let us know what components are used for sample integration test setup. Regards Prasad -----Original Message----- From: osmocom-net-gprs [mailto:osmocom-net-gprs-bounces@lists.osmocom.org] On Behalf Of Neels Hofmeyr Sent: Monday, March 14, 2016 5:43 AM To: Prasad Kaup <Prasad.Kaup(a)radisys.com> Cc: osmocom-net-gprs(a)lists.osmocom.org; Yves Godin <Yves.Godin(a)nutaq.com> Subject: Re: Regarding integration of NURAN L1 1.0 Hi Prasad, AFAIK you need the header files with matching version number to your sysmoBTS's firmware version from http://git.sysmocom.de/sysmo-bts/layer1-api/ I'm a bit new on building osmo-bts myself, so I can't yet say precisely which ./configure options you need to pass; but do take a look at ./configure --help Hope this helps... ~Neels

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Re: OpenGGSN
by Terje Kristoffer Hybbestad Skow 11 Apr '16

11 Apr '16

Hi again. I'm still having problem really getting the sgsnemu and ggsn to talk to each other. When I use 127.0.0.1 and 127.0.0.2 as the listen and remote for the sgsnemu and 127.0.0.2 as listen and 127.0.0.0/24 as network in the ggsn conf, the sgsnemu says "Received echo response Received create PDP context response. IP address: 127.0.0.2" and then nothing happens. When using two computers, one running ggsn and one sgsnemu with the ip-addresses as 192.168.1.14 and 192.168.1.11 respectively, the sgsnemu doesn't seem to get connented. It prints out "idletime.tv_sec 3, idleTime.tv_usec 0" over and over, and "Echo Request timed out". The picture attached is from wireshark on the ggsn computer. I lookt at the pcap you send and it looks like what I would like for my setup. You talk mentioned using symoBTS how much does it cost? And how long is a delivery for it? Regards Terje Skow 2016-03-01 12:56 GMT+01:00 Terje Kristoffer Skow <terjeks(a)stud.ntnu.no>: > Thank you very much!! > > I will have some work getting through this, but I recon I'll have some > more questions later. > > Again thank you > > 2016-03-01 12:39 GMT+01:00 Neels Hofmeyr <nhofmeyr(a)sysmocom.de>: > >> On Tue, Mar 01, 2016 at 11:12:01AM +0100, Terje Kristoffer Hybbestad Skow >> wrote: >> > The "logfile /tmp/foo" did gave an error message saying "unrecognized >> > option". >> >> It seems the logfile option was added on 2014-03-23 with commit >> 9c0ff4fafe4276396125a52c89d36967566fe08c. It may make sense if you build >> your osmocom stack from the git sources to benefit from the latest fixes. >> >> See http://git.osmocom.org, specifically you'd probably want to clone >> and build >> >> git://git.osmocom.org/libosmocore >> git://git.osmocom.org/openggsn >> >> The build steps being for example >> >> autoreconf -fi >> ./configure >> make >> sudo make install >> >> >> > I'm going to look at DNS packets going through a GGSN to try and find >> ways >> > to detect DNS tunnels, do you have any recommendations how to do this? >> > I do not have the time or resources to use real UE's so I hope to >> simulate >> > it on a computer using VMs or something like that. >> >> > I have looked at this: >> http://openbsc.osmocom.org/trac/wiki/OpenBSC_GPRS as >> >> The BTS is for communicating with a phone over the air interface. Abis and >> osmo-nitb are used for voice calls only. The SGSN is needed for real >> networks, >> you should be fine with the sgsnemu. So all you need is sgsnemu and >> openggsn. >> >> You want to figure out how to use the sgsnemu, starting with a route into >> the >> tunnel device that sgsnemu opens up. So you need to look at the 'ip route' >> commands (if you're on linux). I guess you won't need VMs; granted, it >> might >> make it easier to avoid circular routes (to IP addresses that should only >> be >> seen on the GGSN side), but certainly not a necessary prerequisite. >> >> I tried to ping through the sgsnemu tunnel once but saw, as I mentioned, >> that >> the GGSN thwarts GTP messages without a proper context being created >> first. It >> shouldn't be too hard, but I haven't investigated further. So you'd want >> to >> understand the GTP Ctrl & User messages to setup a PGP context (TEIs and >> stuff), and figure out how sgsnemu might make your life easier in that >> regard. >> You probably want to read ETSI 29.060 to figure out GTP: >> >> http://www.etsi.org/deliver/etsi_ts/129000_129099/129060/03.19.00_60/ts_129… >> You may find attached pcap file interesting (open in wireshark and note >> that >> the DNS queries are transmitted over GTP between SGSN and GGSN even though >> wireshark tends to show only the DNS and src/dest enclosed in the GTP). >> And again, you may look at >> http://git.osmocom.org/openbsc/tree/openbsc/tests/gtphub/gtphub_test.c >> about simplistic code examples of composing a PGP context conversation. >> >> If you'd like any more answers to questions you didn't ask ;) >> just give us a shout... >> >> ~Neels >> >> -- >> - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ >> ======================================================================= >> * sysmocom - systems for mobile communications GmbH >> * Alt-Moabit 93 >> * 10559 Berlin, Germany >> * Sitz / Registered office: Berlin, HRB 134158 B >> * Geschäftsführer / Managing Directors: Holger Freyther, Harald Welte >> > >

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[PATCH] Handle GPRS 11 bit RACH in osmo-pcu
by Bhargava Abhyankar 05 Apr '16

05 Apr '16

A function is_single_block is added to get request type of RACH. GPRS 11 bit RACH is handled. --- src/bts.cpp | 56 ++++++++++++++++++++++++++++++++++++++++++++++---------- src/bts.h | 2 ++ 2 files changed, 48 insertions(+), 10 deletions(-) diff --git a/src/bts.cpp b/src/bts.cpp index 62b00c4..2166132 100644 --- a/src/bts.cpp +++ b/src/bts.cpp @@ -473,18 +473,11 @@ int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, uint16_t ta; rach_frame(); - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " "one:\n"); - if ((ra & 0xf8) == 0x70) { - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " - "allocation\n"); - sb = 1; - } else if (m_bts.force_two_phase) { - LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " - "but we force two phase access\n"); - sb = 1; - } + + sb = is_single_block(ra, burst, is_11bit); + if (qta < 0) qta = 0; if (qta > 252) @@ -556,6 +549,49 @@ int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, return 0; } +uint8_t BTS::is_single_block(uint16_t ra, enum ph_burst_type burst, + uint8_t is_11bit) +{ + uint8_t sb = 0; + + if ((is_11bit == 0) && (burst == GSM_L1_BURST_TYPE_ACCESS_0)) { + if ((ra & 0xf8) == 0x70) { + LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " + "allocation\n"); + sb = 1; + } else if (m_bts.force_two_phase) { + LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase " + "access, but we force two phase access\n"); + sb = 1; + } + } else if ((is_11bit == 1) && (burst == GSM_L1_BURST_TYPE_ACCESS_0)) { + if ((ra & 0x7e0) == 0x0600) { + LOGP(DRLCMAC, LOGL_DEBUG, "GPRS 11 bit RACH received. " + "MS requests single block allocation\n"); + sb = 1; + } else if (m_bts.force_two_phase) { + LOGP(DRLCMAC, LOGL_DEBUG, "GPRS 11 bit RACH received." + "MS requests single phase access but we force " + "two phase access\n"); + sb = 1; + } + } else if ((is_11bit == 1) && ((burst == GSM_L1_BURST_TYPE_ACCESS_1) || + (burst == GSM_L1_BURST_TYPE_ACCESS_2))) { + if ((ra & 0x7e0) == 0x0600) { + LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH received. " + "MS requests single block allocation\n"); + sb = 1; + } else if (m_bts.force_two_phase) { + LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH received. " + "MS requests single phase access but we force " + "two phase access\n"); + sb = 1; + } + } + + return sb; +} + /* depending on the current TBF, we assign on PACCH or AGCH */ void BTS::trigger_dl_ass( struct gprs_rlcmac_dl_tbf *dl_tbf, diff --git a/src/bts.h b/src/bts.h index f0fe970..1c5b749 100644 --- a/src/bts.h +++ b/src/bts.h @@ -276,6 +276,8 @@ public: int tfi_find_free(enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, int8_t use_trx); int rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn); + uint8_t is_single_block(uint16_t ra, enum ph_burst_type burst, + uint8_t is_11bit); int rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, enum ph_burst_type burst); -- 2.5.0

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[PATCH] Change interface in osmo-pcu for 11 bit RACH
by Bhargava Abhyankar 01 Apr '16

01 Apr '16

Interface structure between osmo-bts and osmo-pcu is updated with the parameters to differentiate the type of RACH and further support 11 bit RACH. The function prototype and definitions are changed accordingly. Interface version number is increased. --- src/bts.cpp | 3 ++- src/bts.h | 4 +++- src/pcu_l1_if.cpp | 3 ++- src/pcuif_proto.h | 8 ++++++-- tests/tbf/TbfTest.cpp | 5 +++-- 5 files changed, 16 insertions(+), 7 deletions(-) diff --git a/src/bts.cpp b/src/bts.cpp index 715fb51..62b00c4 100644 --- a/src/bts.cpp +++ b/src/bts.cpp @@ -459,7 +459,8 @@ int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) return 0; } -int BTS::rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta) +int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, + enum ph_burst_type burst) { struct gprs_rlcmac_ul_tbf *tbf = NULL; uint8_t trx_no, ts_no = 0; diff --git a/src/bts.h b/src/bts.h index c975304..f0fe970 100644 --- a/src/bts.h +++ b/src/bts.h @@ -28,6 +28,7 @@ extern "C" { #include <osmocom/core/stat_item.h> #include <osmocom/core/timer.h> #include <osmocom/core/gsmtap.h> +#include <osmocom/gsm/l1sap.h> } #include "poll_controller.h" @@ -275,7 +276,8 @@ public: int tfi_find_free(enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, int8_t use_trx); int rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn); - int rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta); + int rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, + enum ph_burst_type burst); void trigger_dl_ass(gprs_rlcmac_dl_tbf *tbf, gprs_rlcmac_tbf *old_tbf); void snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi); diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp index 19dda5c..dbf713c 100644 --- a/src/pcu_l1_if.cpp +++ b/src/pcu_l1_if.cpp @@ -313,7 +313,8 @@ static int pcu_rx_rach_ind(struct gsm_pcu_if_rach_ind *rach_ind) case PCU_IF_SAPI_RACH: rc = BTS::main_bts()->rcv_rach( rach_ind->ra, rach_ind->fn, - rach_ind->qta); + rach_ind->qta, rach_ind->is_11bit, + rach_ind->burst); break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU rach request with " diff --git a/src/pcuif_proto.h b/src/pcuif_proto.h index 9d740ac..eb11770 100644 --- a/src/pcuif_proto.h +++ b/src/pcuif_proto.h @@ -1,7 +1,9 @@ #ifndef _PCUIF_PROTO_H #define _PCUIF_PROTO_H -#define PCU_IF_VERSION 0x05 +#include <osmocom/gsm/l1sap.h> + +#define PCU_IF_VERSION 0x06 /* msg_type */ #define PCU_IF_MSG_DATA_REQ 0x00 /* send data to given channel */ @@ -64,10 +66,12 @@ struct gsm_pcu_if_rts_req { struct gsm_pcu_if_rach_ind { uint8_t sapi; - uint8_t ra; + uint16_t ra; int16_t qta; uint32_t fn; uint16_t arfcn; + uint8_t is_11bit; + enum ph_burst_type burst; } __attribute__ ((packed)); struct gsm_pcu_if_info_trx { diff --git a/tests/tbf/TbfTest.cpp b/tests/tbf/TbfTest.cpp index e1be844..1123ac6 100644 --- a/tests/tbf/TbfTest.cpp +++ b/tests/tbf/TbfTest.cpp @@ -35,6 +35,7 @@ extern "C" { #include <osmocom/core/talloc.h> #include <osmocom/core/utils.h> #include <osmocom/vty/vty.h> +#include <osmocom/gsm/l1sap.h> } #include <errno.h> @@ -552,7 +553,7 @@ static gprs_rlcmac_ul_tbf *establish_ul_tbf_single_phase(BTS *the_bts, tfi = the_bts->tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx_no, -1); - the_bts->rcv_rach(0x03, *fn, qta); + the_bts->rcv_rach(0x03, *fn, qta, 0, GSM_L1_BURST_TYPE_ACCESS_0); ul_tbf = the_bts->ul_tbf_by_tfi(tfi, trx_no, ts_no); OSMO_ASSERT(ul_tbf != NULL); @@ -639,7 +640,7 @@ static gprs_rlcmac_ul_tbf *establish_ul_tbf_two_phase(BTS *the_bts, request_dl_rlc_block(bts, trx_no, ts_no, 0, fn); /* simulate RACH, this sends an Immediate Assignment Uplink on the AGCH */ - the_bts->rcv_rach(0x73, rach_fn, qta); + the_bts->rcv_rach(0x73, rach_fn, qta, 0, GSM_L1_BURST_TYPE_ACCESS_0); /* get next free TFI */ tfi = the_bts->tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx_no, -1); -- 2.5.0

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[PATCH] Change interface in osmo-bts for 11 bit RACH
by Bhargava Abhyankar 01 Apr '16

01 Apr '16

Interface structure between osmo-bts and osmo-pcu is updated with the parameters to differentiate the type of RACH and further support 11 bit RACH. The function prototype and definitions are changed accordingly. Interface version number is increaded. --- include/osmo-bts/pcu_if.h | 3 ++- include/osmo-bts/pcuif_proto.h | 6 ++++-- src/common/l1sap.c | 3 ++- src/common/pcu_sock.c | 5 ++++- src/osmo-bts-sysmo/l1_if.c | 6 ++++++ 5 files changed, 18 insertions(+), 5 deletions(-) diff --git a/include/osmo-bts/pcu_if.h b/include/osmo-bts/pcu_if.h index 0c4fb69..0c0f0b2 100644 --- a/include/osmo-bts/pcu_if.h +++ b/include/osmo-bts/pcu_if.h @@ -11,7 +11,8 @@ int pcu_tx_rts_req(struct gsm_bts_trx_ts *ts, uint8_t is_ptcch, uint32_t fn, int pcu_tx_data_ind(struct gsm_bts_trx_ts *ts, uint8_t is_ptcch, uint32_t fn, uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len, int8_t rssi); -int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint8_t ra, uint32_t fn); +int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint16_t ra, uint32_t fn, + uint8_t is_11bit, enum ph_burst_type burst); int pcu_tx_time_ind(uint32_t fn); int pcu_tx_pag_req(const uint8_t *identity_lv, uint8_t chan_needed); int pcu_tx_pch_data_cnf(uint32_t fn, uint8_t *data, uint8_t len); diff --git a/include/osmo-bts/pcuif_proto.h b/include/osmo-bts/pcuif_proto.h index 9d740ac..b965d7c 100644 --- a/include/osmo-bts/pcuif_proto.h +++ b/include/osmo-bts/pcuif_proto.h @@ -1,7 +1,7 @@ #ifndef _PCUIF_PROTO_H #define _PCUIF_PROTO_H -#define PCU_IF_VERSION 0x05 +#define PCU_IF_VERSION 0x06 /* msg_type */ #define PCU_IF_MSG_DATA_REQ 0x00 /* send data to given channel */ @@ -64,10 +64,12 @@ struct gsm_pcu_if_rts_req { struct gsm_pcu_if_rach_ind { uint8_t sapi; - uint8_t ra; + uint16_t ra; int16_t qta; uint32_t fn; uint16_t arfcn; + uint8_t is_11bit; + enum ph_burst_type burst; } __attribute__ ((packed)); struct gsm_pcu_if_info_trx { diff --git a/src/common/l1sap.c b/src/common/l1sap.c index ac398d3..2b2e8f4 100644 --- a/src/common/l1sap.c +++ b/src/common/l1sap.c @@ -903,7 +903,8 @@ static int l1sap_ph_rach_ind(struct gsm_bts_trx *trx, if (trx == bts->c0 && L1SAP_IS_PACKET_RACH(rach_ind->ra)) { LOGP(DL1P, LOGL_INFO, "RACH for packet access\n"); pcu_tx_rach_ind(bts, rach_ind->acc_delay << 2, - rach_ind->ra, rach_ind->fn); + rach_ind->ra, rach_ind->fn, + rach_ind->is_11bit, rach_ind->burst); return 0; } diff --git a/src/common/pcu_sock.c b/src/common/pcu_sock.c index 7c835fb..d7825f0 100644 --- a/src/common/pcu_sock.c +++ b/src/common/pcu_sock.c @@ -343,7 +343,8 @@ int pcu_tx_data_ind(struct gsm_bts_trx_ts *ts, uint8_t is_ptcch, uint32_t fn, return pcu_sock_send(&bts_gsmnet, msg); } -int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint8_t ra, uint32_t fn) +int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint16_t ra, uint32_t fn, + uint8_t is_11bit, enum ph_burst_type burst) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; @@ -362,6 +363,8 @@ int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint8_t ra, uint32_t fn) rach_ind->ra = ra; rach_ind->qta = qta; rach_ind->fn = fn; + rach_ind->is_11bit = is_11bit; + rach_ind->burst = burst; return pcu_sock_send(&bts_gsmnet, msg); } diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c index debc80a..a8f957c 100644 --- a/src/osmo-bts-sysmo/l1_if.c +++ b/src/osmo-bts-sysmo/l1_if.c @@ -898,6 +898,12 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, l1sap->u.rach_ind.ra = ra; l1sap->u.rach_ind.acc_delay = acc_delay; l1sap->u.rach_ind.fn = fn; + + /* Initialising the parameters needs to be handled when 11 bit RACH + * is supported */ + l1sap->u.rach_ind.is_11bit = 0; + l1sap->u.rach_ind.burst = GSM_L1_BURST_TYPE_ACCESS_0; + if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) l1sap->u.rach_ind.chan_nr = 0x88; -- 2.5.0

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[PATCH] Update structure in libosmocore for 11 bit RACH
by Bhargava Abhyankar 01 Apr '16

01 Apr '16

Parameters are added to the structure ph_rach_ind_param to differentiate the type of RACH received from Layer 1. This is to further support the 11 bit RACH. --- include/osmocom/gsm/l1sap.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/osmocom/gsm/l1sap.h b/include/osmocom/gsm/l1sap.h index 1af8ba8..d7bd172 100644 --- a/include/osmocom/gsm/l1sap.h +++ b/include/osmocom/gsm/l1sap.h @@ -44,12 +44,21 @@ struct ph_rach_req_param { uint16_t offset; /*!< \brief Timing Offset */ }; +/*! \brief for PH_RA_IND burstType inforamtion */ +enum ph_burst_type { + GSM_L1_BURST_TYPE_ACCESS_0 = 4, + GSM_L1_BURST_TYPE_ACCESS_1, + GSM_L1_BURST_TYPE_ACCESS_2 +}; + /*! \brief for PH-RANDOM_ACCESS.ind */ struct ph_rach_ind_param { uint8_t chan_nr; /*!< \brief Channel Number (Like RSL) */ - uint8_t ra; /*!< \brief Random Access */ + uint16_t ra; /*!< \brief Random Access */ uint8_t acc_delay; /*!< \brief Delay in bit periods */ uint32_t fn; /*!< \brief GSM Frame Number at time of RA */ + uint8_t is_11bit; /*!< \brief no.of bits in RACH*/ + enum ph_burst_type burst; /*!< \brief type of burst*/ }; /*! \brief for PH-[UNIT]DATA.{req,ind} | PH-RTS.ind */ -- 2.5.0

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