This makes it possible to use GSM 850 and PCS 1900 bands, as used in the
US. The support relies on the phone hardware.
Each band (900, DCS, 850, PCS, 480 and 450) can be enabled and
disabled individually for each setting.
This patch changes include paths to get osmocom-bb working with
the current libosmocore tree.
Among all these renames, you can notice several tweaks that I
added on purpose, and that require some explanation, they are:
* hexdump() in osmocon.c and osmoload.c has been renamed to avoid
clashing with hexdump() defined in libosmocore.
* gsmmap now depends on libosmogsm. Actually I had to cleanup
Makefile.am because I was experiencing weird linking problems,
probably due to a bug in the autotools. With the change included
in this patch, I got it compiled and linked here correctly.
This patch has been tested with the phone Motorola C123 and the
following images files:
* firmware/board/compal_e88/hello_world.compalram.bin
* firmware/board/compal_e88/layer1.compalram.bin
Using the osmocon, bcch_scan and mobile tools.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
In order to resume correctly, the first message (ASSIGNMENT COMPLETE or
HANDOVER COMPLETE) must be sent after the link is resumed. Therefore it
must be given with the resume command. Unacknowledged messages are
transmitted afterwards, if any.
There are two criterions for lossing a signal, idle mode and dedicated mode.
A counter counts down when a frame is dropped, and counts up when a valid
frame is received on certain channel. The loss criterion is reached, if the
counter reaches 0. The values added to / removed from the counter and the
limits depend on the process.
Without it, the indicated TA and power never get received by layer23.
This may cause a release duing TCH on certain networks. Also it
is required to apply timing advance and transmit power during movement.
Supported features of hardware (support.c) can be disabled by config.
This way the full featured mobile can be downgraded to indicate less
features to the network, like disabling speech support or crypto support.
The cell provides SYSTEM INFORMATION 5* and 6. These are used to create a
list of neighbor cells to monitor. Because there is no neighbor cell
monitoring supported by layer1, the list has no valid results yet.
Currently the average RX level of received frames are used to generate a new
report every second. The report is transmitted to layer1 and used there
whenever a measurement report has to be transmitted.
The timing advance and the current transmit power (as requested by network),
is included with every report.
Sylvain pointed out that CM SERVICE ACCEPT message is not requred, if
ciphering has been completed. In this case, an RR_SYNC_IND is sent
to mobility management, and treated there as CM SERVICE ACCEPT.
The layer23 will now set crypto mode and key when CIPHERING MODE COMMAND is
received. After crypto mode has been set, CIPHERING MODE COMPLETE is sent.
NOTE: Layer1 implements only the interface, there is no functionality to it
yet.
This is required if a pending DATA_REQ is scheduled. It becomes obsolete,
because LAPDm will keep the last unacknowledged message, if any, and resend
it in case of re-establishing on a new channel.
Assignment command is now complete as well as frequency redifinition.
The handover process is partly complete. Further functionality depends
on layer1 capabilites. The measurement report is also incomplete.
This commit features handling of ASSIGNMENT COMMAND. Currently only channel
descriptions "after time" are processed, which is mostly the case.
The ASSIGNMENT COMMAND is essential, because public networks assign an
SDCCH4/8 before actually assigning a TCH.
This is required to detect duplicated messages during assignment or
handover. Each PDISC uses its own sequence number, but MM+CC+SS share the
same. The sequence number is only required in uplink direction.
Dieter: Please check, if your tester eats it now. Also try to trace if the
sequence number is set correctly.
This split the headers and adapt the source.
We use osmocom/bb as a prefix because libosomore also
uses osmocom and generic names such as misc & common could
conflict in the future.
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
We split into :
- common: Everything that can be shared
- mobile: The real spec compliant mobile phones
- misc: Different test stuff
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Andreas.Eversberg
Sylvain Munaut
Harald Welte