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2014-01-04alloc_algorithm_b: Add seperate function to shrink rx window when TS are removedjolly/allocation-fixesAndreas Eversberg1-6/+12
After reduce_rx_window() and update_rx_win_max() was called, one or more TS might be removed. tx_win_min and tx_win_max must be adjusted to the new range of allocated slots.
2014-01-04alloc_algorithm_b: Increment 'i', so allocated TS will not exceed tx_rangeAndreas Eversberg1-2/+2
2014-01-04alloc_algorithm_b: Do not select uplink slots that cannot be used for downlinkAndreas Eversberg1-4/+21
In order to poll MS, the mobile must be able to receive polling request. In order to allow the MS to transmit, the USF must be received by the mobile.
2014-01-04alloc_algorithm_b: Set tx_range to 8, if all 8 TS are supported by MSAndreas Eversberg1-0/+3
2014-01-04alloc_algorithm_b: For type 1 MS, limit number of donwlink TS to 5Andreas Eversberg1-0/+6
The algorithm does not support more than 5 TS on downlink for type 1 MS. Supporting more than 5 TS would require adding more complexity to this algorithm. MS that support more than 4 (or 5) TS on downlink are rare, if they really exist.
2014-01-04alloc_algorithm_b: Correctly increment RX/TX window, even if TS is not useableAndreas Eversberg1-8/+8
2014-01-04fixup 6791384eb3276840896e1f5908027c688ed9ae10Andreas Eversberg1-2/+2
2013-12-26alloc/test: Add a crazy test that tests each possible combinationHolger Hans Peter Freyther1-0/+130
Make a crazy test that will test each possible PDCH configuration and MS Class and verify that the UL/DL assignments work and that they are on the same first_common_ts.
2013-12-26alloc: Move the uplink ts selection/pre-assignment out of the codeHolger Hans Peter Freyther1-87/+100
Create a select_ul_slots which is very (95%) similar to the select_dl_slots handling. This needs to be refactored and the todo for multiple uplink slots should be handled too. Add a warning about a potential failure on a busy PCU.
2013-12-26alloc: Move the selection of the first enabled pdch to a new methodHolger Hans Peter Freyther1-14/+23
2013-12-26alloc: Move the tx window calculation to a new methodHolger Hans Peter Freyther1-18/+24
2013-12-26alloc: Move upating of the rx window max for Type==1 to a new methodHolger Hans Peter Freyther1-10/+21
2013-12-26alloc: Move the collision handling to a new methodHolger Hans Peter Freyther1-64/+88
The naming of RX/TX still looks fishy and it should use DL/UL instead. Work on pointers right now. We could introduce a struct with the window min and max and pass this struct. The usage of 'D' appears wrong in the ul_usage..
2013-12-26alloc: Move the selection of downlink slots to a new methodHolger Hans Peter Freyther1-67/+86
This code could evolve into working for Uplink and Downlink. The only different for the final Uplink assignment is that free USFs are collected.
2013-12-25alloc: Simplify the assignment of Trb and TtbHolger Hans Peter Freyther1-6/+2
Put the cases for MS_A/MS_B and MS_A/MS_C together.
2013-12-25alloc: Add a note that the tx window handling differs from rxHolger Hans Peter Freyther1-0/+2
It looks like the code is different (without a reason) a good reason.
2013-12-25tbf: Kill the tsc member as it duplicates dataHolger Hans Peter Freyther5-8/+12
We can just use first_ts and the trx/pdch to extract this information. Avoid duplication of data.
2013-12-25alloc/test: Go through all possible ms_classes for the allocationHolger Hans Peter Freyther2-9/+955
Generate results for all possible classes.
2013-12-25tbf: Fix typo and call it sameHolger Hans Peter Freyther1-1/+1
2013-12-25bts: Rename ts and trx to ts_no and trx_no as we operate on numberHolger Hans Peter Freyther1-6/+6
2013-12-25alloc/tests: Create an allocation test for various scenariousHolger Hans Peter Freyther3-5/+173
The allocation in the TBF/BTS code is quite complex. In parts this is due the assignment and requests occuring under differen circumstances. Attempt to re-create the commono scenarios. Remove the bogus msclass check in gprs_rlcmac_tbf::update as the allocation code will check the ms class anyway.
2013-12-25sched: Document a possible race conditionHolger Hans Peter Freyther1-0/+6
2013-12-25sched: Attempt to improve the fairness and schedule UL/AL ACK/ASSHolger Hans Peter Freyther2-14/+23
It is possible that certain UL ACK messages are not sent when there are many many uplink and downlink assignments. Try to be more fair and schedule them round-robin. This way no starvation should occur.
2013-12-25sched: Remove unused bts parameter from the internal methodHolger Hans Peter Freyther1-2/+2
2013-12-25llc: Calculate the average queuing delay of the LLC queuesDaniel Willmann3-4/+28
Use a formula like it is used with TCP. This can help to make decisions about if frames should be dropped or not at the time we enqueue them. This code will store two timeval structs in fron the of the actual data and compute the average at the time of the dequeue.
2013-12-25llc: Initialize the LLC frame with garbage to detect wrong usageHolger Hans Peter Freyther1-0/+2
2013-12-18llc: Count the number of frames queued inside the LLC queueHolger Hans Peter Freyther3-2/+10
2013-12-18rlc: Use sizeof() for the memset instead of ARRAY_SIZEHolger Hans Peter Freyther1-1/+1
In this case both will give the same result but it is better to use sizeof. But it is better to use the raw number of bytes instead of the number of elements.
2013-12-17systemd: Add a service for the sysmopcuHenning Heinold1-0/+15
Provide a systemd service file for sysmopcu, leaves the bundled combined sysvinit for sysmobts and sysmopcu for legacy systems. Sponsored-by: sysmocom
2013-12-12test: Remove the side-effect from the assertionHolger Hans Peter Freyther1-1/+2
Coverity complains about this code as it doesn't know that the OSMO_ASSERT is always on. But it is good practice to now have the side-effect in here. Fixes: Coverity CID 1080724
2013-12-12l1if: Include string.h to fix possible coverity issueHolger Hans Peter Freyther1-0/+1
Coverity warns about the below lines of code. strerror is supposed to return a char* and %s should work on char. Let's see if including string.h will make coverity more happy. The pre-processes file looked sane as well. LOGP(DL1IF, LOGL_ERROR, "error writing to L1 msg_queue: %s\n", strerror(errno)); Coverity: CID 1040951, CID 1040950, CID 1040952
2013-12-12Merge branch 'sysmocom/gprs-window-handling' into sysmocom/masterHolger Hans Peter Freyther8-34/+170
Daniel and me worked on the window handling. We now test that what we encode is compatible to what we decode. The char array now includes SSN-1 to the right of the array (reflecting a time axis that grows towards the right..)
2013-12-12decoding: Cosmetic - change rbb decodingDaniel Willmann1-2/+4
2013-12-12rlc: Make the update loop more understandableDaniel Willmann1-7/+11
Add bitnum_to_bsn() as a convenience function to get the BSN, use it in the update handling and ignore rbb for values outside of our tx window.
2013-12-12tests/TypesTest: Check rbb handling in DLDaniel Willmann2-0/+37
2013-12-12tests/TypesTest: Ensure that extract_rbb(encode_rbb(x)) == xDaniel Willmann1-0/+11
2013-12-12decoding: Use 'I' and 'R' in rbb array for DLDaniel Willmann3-3/+3
We want to match up rbb decoding and encoding so it helps to use the same chars.
2013-12-12tests/TypesTest: Print the result of Encoding::encode_rbb()Daniel Willmann2-0/+17
2013-12-12encoding: Factor out encode_rbb to help testingDaniel Willmann2-13/+24
2013-12-12encoding: Use ul_window ssn()/update_rbb() methods when encoding ul ACKDaniel Willmann1-20/+18
Use the ssn() and update_rbb() methods of gprs_rlc_ul_window when encoding the ACK/NACK packet in write_packet_uplink_ack()
2013-12-12encoding: Change wording to match that of 3GPP TS 04.60Daniel Willmann1-1/+1
The spec (in ch. 9.1.8.1) speaks of RECEIVED or INVALID in the RLC receiver, so change the wording in the log message to match.
2013-12-12tests/TypesTest: Add OSMO_ASSERT_STR_EQ which prints out the parametersDaniel Willmann1-6/+15
Use it to compare rbb
2013-12-12tests/TypesTest: Test ssn() and update_rbb() uplink window methods in TypesTestDaniel Willmann1-0/+27
Test that ssn and rbb are updated correctly.
2013-12-12rlc: Manage the received block bitmap in the ul_windowDaniel Willmann2-0/+20
Added two methods to gprs_rlc_ul_window * ssn() returns the starting sequence number * update_rbb() returns an array of chars representing the state of the received block bitmap. Each element is either 'I'nvalid or 'R'eceived. The rbb is generated from v_n rbb[63] relates to BSN ssn-1 ... rbb[0] relates to BSN ssn-64
2013-12-04rlc: Create a testcase for the uplink windowHolger Hans Peter Freyther1-1/+99
2013-12-04rlc: Make the RLC types only operate on the BSNHolger Hans Peter Freyther4-116/+112
The code has an internal optimization to only use window_size space. This means that the caller needed to know that only half of the size was used. Change the API to work on the BSN and do the mapping internally. The compiler should have plenty of opportunity to propagate the constant(s) but this has not been verified.
2013-12-04tbf: Separate the handling for rh->si and call in case of re-transmissionHolger Hans Peter Freyther2-8/+15
In case of a retransmission ack the window again..
2013-11-26tbf/sched: We pick the _last_ entry, rotate the listsHolger Hans Peter Freyther3-0/+13
We always pick the _last_ entry from the lists. Let's rotate so we make it a bit more fair.
2013-11-26tbf/rlc: Move raising of V(Q) into the ul window codeHolger Hans Peter Freyther3-18/+36
2013-11-26rlc/tbf: Move the code to raise V(R) into the ul_window handlingHolger Hans Peter Freyther3-14/+22
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