osmo-pcu.git branch jerlbeck/wip/ms-struct updated. 0.2-478-g0a96390

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Mon Jun 15 11:26:39 UTC 2015


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The branch, jerlbeck/wip/ms-struct has been updated
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       via  618babae128ddc2cd1bdca8d65ea1156ad78ee75 (commit)

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http://cgit.osmocom.org/osmo-pcu/commit/?id=0a9639012204a79bf5ae4c103a6de083e7e488d6

commit 0a9639012204a79bf5ae4c103a6de083e7e488d6
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Jun 12 10:52:34 2015 +0200

    ms: Reduce DL CS level if only a few LLC bytes are left
    
    If just a few bytes are left to send to the MS, it makes sense to
    reduce the coding scheme level to increase the throughput. This
    has been shown by Chen and Goodman in their paper "Theoretical
    Analysis of GPRS Throughput and Delay". See their throughput over C/I
    measurement graphs (figures 4 and 5 in the paper) for details.
    
    This commit implements a simplified CS downgrade feature for the
    downlink. The coding scheme will be downgraded if there are only a
    few octets are left to be send over the TBF (see the
    downgrade-threshold command below) and the NACK rate is not low (the
    CS will not get degraded on a high quality RF link). As an exception,
    CS-3 will be degraded to CS-1, since CS-2 does not improve the
    throughput in general when a few small packets are sent and the
    signal fades slowly (see Chen/Goodman).
    
    The following VTY command is added to the config-pcu node:
    
    - cs downgrade-threshold <1-10000>
    - cs no downgrade-threshold
    
    to set the threshold of the number of remaining bytes to be RLC/MAC
    encoded. The CS will only be reduced, if the number is below the
    threshold. The 'no' command disables this feature completely. The
    default value is 200 octets.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/osmo-pcu/commit/?id=155cf8442a796d7263e5fb480e029cad353afcf0

commit 155cf8442a796d7263e5fb480e029cad353afcf0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Jun 15 11:05:44 2015 +0200

    llc: Keep track of the number of stored LLC octets
    
    To get the number of LLC octets that are stored in the queue, this
    commit adds a m_queue_octets member along with a octets() method.
    This value is updated similarly to m_queue_size on each modifying
    method call.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/osmo-pcu/commit/?id=bd8c689ed42c5260719b3ca172ad3052d73467e0

commit bd8c689ed42c5260719b3ca172ad3052d73467e0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Jun 15 11:19:13 2015 +0200

    llc: Add missing include directive to llc.h
    
    Currently struct llist_head is used without declaration which
    accidently did not produce an error so far.
    
    This commit adds the missing include directive.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/osmo-pcu/commit/?id=618babae128ddc2cd1bdca8d65ea1156ad78ee75

commit 618babae128ddc2cd1bdca8d65ea1156ad78ee75
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Jun 15 11:04:25 2015 +0200

    llc/test: Add test program for LLC related tests
    
    Sponsored-by: On-Waves ehf

-----------------------------------------------------------------------

Summary of changes:
 src/bts.h             |   1 +
 src/gprs_ms.cpp       |  18 ++---
 src/llc.cpp           |   4 ++
 src/llc.h             |  11 +++
 src/pcu_main.cpp      |   1 +
 src/pcu_vty.c         |  34 ++++++++++
 tests/Makefile.am     |  14 +++-
 tests/llc/LlcTest.cpp | 180 ++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/llc/LlcTest.err |   4 ++
 tests/llc/LlcTest.ok  |   2 +
 tests/ms/MsTest.cpp   |  38 +++++++++++
 tests/ms/MsTest.err   |   2 +
 tests/ms/MsTest.ok    |   2 +
 tests/testsuite.at    |   7 ++
 14 files changed, 309 insertions(+), 9 deletions(-)
 create mode 100644 tests/llc/LlcTest.cpp
 create mode 100644 tests/llc/LlcTest.err
 create mode 100644 tests/llc/LlcTest.ok


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