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<DIV ALIGN=CENTER>
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<BR>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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<BR>
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<BR>
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<BR>
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Introduction to the OsmocomDECT stack<BR>
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<BR>
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OsmoDevCon2013<BR>
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4th-8th April 2013<BR>
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Berlin, Germany<BR>
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<BR>
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Patrick McHardy <kaber@trash.net><BR>
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<BR>
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<A HREF=http://dect.osmocom.org>http://dect.osmocom.org</A><BR>
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<BR>
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<BR>
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</DIV>
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<BR>
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(page 1)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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Overview<BR>
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<BR>
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<UL>
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<LI>DECT stack implementing physical layer, MAC layer, Data Link control layer, Network layer and Interworking unit
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<LI>Supports FP (base station) and PP (portable part) modes
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<LI>Physical Layer implemented through driver for sc1442x baseband chipsets, including open source firmware and generic transceiver layer
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<LI>MAC layers (cell site, cluster control), Data Link control contained in kernel
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<LI>Network layer implemented as userspace library
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</UL>
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</DIV>
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<BR>
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(page 2)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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Physical layer<BR>
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<BR>
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Drivers: drivers/dect<BR>
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<BR>
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<UL>
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<LI>Drivers interact with baseband processor and radio
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<UL>
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<LI>Radio programming
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<LI>Baseband programming (runtime firmware patching)
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<LI>Frame reception and transmission
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<LI>Time keeping
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<LI>Ciphering offloading
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</UL>
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<LI>Received frames for 1-6 timeslots and current time are encapsulated in "dect_transceiver_event" structure and queued to generic transceiver layer
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</UL>
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</DIV>
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<BR>
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(page 3)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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sc1442x driver: drivers/dect/coa<BR>
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<BR>
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<UL>
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<LI>Implements support for sc14421/24 basebands
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<UL>
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<LI>sc14421: ComOnAir PCMCIA cards
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<LI>sc14424: ComOnAir PCI cards
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<LI>Features:
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<UL>
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<LI>Cipher offloading
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<LI>Checksum offloading
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<LI>Wideband audio
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</UL>
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<LI>Open source firmware assembled during kernel build
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<LI>"radio_ops" for different radio types
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 4)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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sc1442x driver: drivers/dect/coa<BR>
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<BR>
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<UL>
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<LI>Baseband processor:
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<UL>
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<LI>Executes one instruction per DECT symbol
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<LI>Call stack of depth 3
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<LI>Synchonization instructions: WT, WNT, EN_SL_ADJ
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<LI>Transmission and reception: B_SR/B_ST, B_AR/B_AT, B_BR/B_BT, B_BRFU/B_BTFU, ...
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<LI>Ciphering: D_LDK/D_PREP, D_LDS/D_WRS
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<LI>Control PINs: P_LD, P_LDL, P_LDH
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<LI>Microwire transmission (radio settings): MEN1N, MEN1, M_WR
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 5)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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sc1442x driver: drivers/dect/coa<BR>
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<BR>
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<UL>
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<LI>Radios:
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<UL>
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<LI>U2785 ATMEL RF IC:
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<UL>
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<LI>PCI and Type II PCMCIA cards
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<LI>"Slow-hopping" radio: needs one timeslot for channel switching
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<LI>Dynamic mapping of DECT bands to divisor/swallow count settings
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</UL>
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<LI>LMX3161 NSC Single Chip Radio Transceiver:
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<UL>
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<LI>Type III PCMCIA cards
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<LI>Not supported yet, work is ongoing
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</UL>
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 6)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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Physical layer<BR>
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<BR>
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Transceiver layer: net/dect/transceiver.c<BR>
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<BR>
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<UL>
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<LI>Handling of "transceiver groups": multiple synchronized transceivers
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<UL>
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<LI>Synchronization of secondary transceivers
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<LI>Dequeues events from all transceivers in a group
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<LI>Events are sorted chronologically
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<LI>Virtual clock maintenance
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<LI>Queueing of reordered events to MAC cell site layer
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<LI>Clock replay to MAC cell site layer
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 7)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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Physical layer<BR>
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<BR>
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Transceiver layer: net/dect/transceiver.c<BR>
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<BR>
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<UL>
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<LI>Netlink userspace API:
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<UL>
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<LI>Notification about new/removed transceivers
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<LI>Transceiver configuration
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<LI>Attachment/detachment to/from cells
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<LI>Band configuration
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<LI>Status information
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<LI>Statistics
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 8)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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Physical layer<BR>
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<BR>
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Transceiver layer: net/dect/transceiver.c<BR>
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<FONT SIZE=-3><BR>
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\# dect-transceiver-list --name trx9<BR>
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DECT Transceiver trx9@cell0:<BR>
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Type: sc1442x<BR>
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RF-band: 00000<BR>
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Events: busy: 0 late: 2587<BR>
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slot 0: <tx> carrier: 2 (1893.888 MHz)<BR>
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RX: bytes 320 packets 40 a-crc-errors 1 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 1776 packets 37<BR>
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slot 2: <idle> carrier: 0 (1897.344 MHz)<BR>
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RX: bytes 0 packets 0 a-crc-errors 0 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 0 packets 0<BR>
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[...]<BR>
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slot 10: <rx,sync> carrier: 9 (1881.792 MHz +0.569 kHz) signal level: -41.94dBm<BR>
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RX: bytes 2600 packets 325 a-crc-errors 0 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 0 packets 0<BR>
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slot 12: <rx> carrier: 2 (1893.888 MHz +0.083 kHz) signal level: -57.47dBm<BR>
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RX: bytes 1764 packets 36 a-crc-errors 0 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 0 packets 0<BR>
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slot 14: <idle> carrier: 0 (1897.344 MHz)<BR>
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RX: bytes 0 packets 0 a-crc-errors 0 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 0 packets 0<BR>
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[...]<BR>
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slot 22: <idle> carrier: 0 (1897.344 MHz)<BR>
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RX: bytes 0 packets 0 a-crc-errors 0 x-crc-errors 0 z-crc-errors 0<BR>
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TX: bytes 0 packets 0<BR>
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</FONT></DIV>
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<BR>
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(page 9)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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MAC layer<BR>
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<BR>
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MAC layer overview<BR>
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<BR>
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<UL>
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<LI>MAC layer
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<UL>
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<LI>CSF (Cell site Functions)
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<LI>CCF (Cluster Control functions)
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<LI>Communication between layers either through handles
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<LI>Either direct function calls or network protocol
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<LI>Network protocol unfinished
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<LI>Transparent
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 10)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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MAC layer<BR>
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<BR>
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MAC cell site functions (CSF): net/dect/mac_csf.c<BR>
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<BR>
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<UL>
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<LI>Maintenance tasks:
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<UL>
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<LI>Transceiver group maintenance (bind/unbind)
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<LI>Frame timer synchronization and maintenance
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<LI>Channel list maintenance (periodic scanning and quality control)
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<LI>Channel selection based on channel lists
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<LI>Transceiver selection
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<LI>Bearer enablement timing
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<LI>Bearer quality control
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 11)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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MAC layer<BR>
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<BR>
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MAC cell site functions (CSF): net/dect/mac_csf.c<BR>
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<BR>
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<UL>
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<LI>Idle receiver control (IRC):
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<UL>
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301
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<LI>Locking to FPs (PP-side only)
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302
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<LI>Secondary transceiver synchronization
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303
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<LI>Periodic channel scanning
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<LI>Channel hopping (receiver channel scanning sequence)
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<LI>Reception of MAC connection requests (usually FP-side only)
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</UL>
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</UL>
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</DIV>
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<BR>
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(page 12)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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MAC layer<BR>
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<BR>
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320
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MAC cell site functions (CSF): net/dect/mac_csf.c<BR>
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<BR>
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<UL>
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<LI>Dummy bearer control (DBC):
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<UL>
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325
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<LI>FP-side only
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326
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<LI>Broadcast bearer
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327
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<LI>Cell identity
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328
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<LI>Timing information
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<LI>Cell capabilities
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330
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<LI>Paging
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</UL>
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</UL>
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</DIV>
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<BR>
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335
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(page 13)<BR>
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<HR>
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<DIV ALIGN=CENTER>
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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<DIV ALIGN=LEFT>
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<BR>
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<BR>
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MAC layer<BR>
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344
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<BR>
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345
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MAC cell site functions (CSF): net/dect/mac_csf.c<BR>
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<BR>
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347
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<UL>
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348
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<LI>Traffic bearer control (TBC):
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349
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<UL>
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350
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<LI>Bi-directional traffic bearer setup and management
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351
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<LI>Muxing/Demuxing of higher layer data and MAC layer information
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</UL>
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</UL>
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354
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<BR>
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355
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<UL>
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356
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<LI>Monitor Bearer control (DMB):
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<UL>
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358
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<LI>Used for sniffing
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359
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<LI>Follows FP channel hopping sequence
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360
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<LI>Locks to new MAC connections
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361
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<LI>Passes frames up to AF_DECT raw sockets
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362
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</UL>
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363
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</UL>
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364
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</DIV>
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365
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<BR>
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366
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(page 14)<BR>
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367
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<HR>
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368
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<DIV ALIGN=CENTER>
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369
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<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
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</DIV>
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371
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<DIV ALIGN=LEFT>
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372
|
<BR>
|
|
373
|
<BR>
|
|
374
|
MAC layer<BR>
|
|
375
|
<BR>
|
|
376
|
MAC cell site functions (CSF): net/dect/mac_csf.c<BR>
|
|
377
|
<BR>
|
|
378
|
<UL>
|
|
379
|
<LI>Netlink userspace API:
|
|
380
|
<UL>
|
|
381
|
<LI>Cell site configuration
|
|
382
|
<LI>Binding of cells to clusters
|
|
383
|
<LI>Reporting of scan results
|
|
384
|
<LI>Status information
|
|
385
|
</UL>
|
|
386
|
</UL>
|
|
387
|
</DIV>
|
|
388
|
<BR>
|
|
389
|
(page 15)<BR>
|
|
390
|
<HR>
|
|
391
|
<DIV ALIGN=CENTER>
|
|
392
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
393
|
</DIV>
|
|
394
|
<DIV ALIGN=LEFT>
|
|
395
|
<BR>
|
|
396
|
<BR>
|
|
397
|
MAC layer<BR>
|
|
398
|
<BR>
|
|
399
|
MAC cluster control functions (CCF): net/dect/mac_csf.c<BR>
|
|
400
|
<BR>
|
|
401
|
<UL>
|
|
402
|
<LI>Maintenance tasks:
|
|
403
|
<UL>
|
|
404
|
<LI>Cluster MAC layer frame timers
|
|
405
|
<LI>Cell site MAC layer configuration
|
|
406
|
</UL>
|
|
407
|
</UL>
|
|
408
|
<BR>
|
|
409
|
<UL>
|
|
410
|
<LI>Broadcast message control (BMC):
|
|
411
|
<UL>
|
|
412
|
<LI>Dispatch of paging messages to cell site functions (FP-side only)
|
|
413
|
<LI>Reception of paging messages from cell site functions (PP-side only)
|
|
414
|
</UL>
|
|
415
|
</UL>
|
|
416
|
</DIV>
|
|
417
|
<BR>
|
|
418
|
(page 16)<BR>
|
|
419
|
<HR>
|
|
420
|
<DIV ALIGN=CENTER>
|
|
421
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
422
|
</DIV>
|
|
423
|
<DIV ALIGN=LEFT>
|
|
424
|
<BR>
|
|
425
|
<BR>
|
|
426
|
MAC layer<BR>
|
|
427
|
<BR>
|
|
428
|
MAC cluster control functions (CCF): net/dect/mac_csf.c<BR>
|
|
429
|
<BR>
|
|
430
|
<UL>
|
|
431
|
<LI>Multi-Bearer control (MBC):
|
|
432
|
<UL>
|
|
433
|
<LI>Maintains multiple cell-site traffic bearers to form a multi bearer
|
|
434
|
<LI>Cipher management of traffic bearers
|
|
435
|
<LI>Hand-over
|
|
436
|
<LI>Higher layer data distribution to traffic bearers
|
|
437
|
<LI>Reception of higher layer data from cell site function
|
|
438
|
<LI>Removal of redundant data
|
|
439
|
</UL>
|
|
440
|
</UL>
|
|
441
|
</DIV>
|
|
442
|
<BR>
|
|
443
|
(page 17)<BR>
|
|
444
|
<HR>
|
|
445
|
<DIV ALIGN=CENTER>
|
|
446
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
447
|
</DIV>
|
|
448
|
<DIV ALIGN=LEFT>
|
|
449
|
<BR>
|
|
450
|
<BR>
|
|
451
|
MAC layer<BR>
|
|
452
|
<BR>
|
|
453
|
MAC cluster control functions (CCF): net/dect/mac_csf.c<BR>
|
|
454
|
<BR>
|
|
455
|
<UL>
|
|
456
|
<LI>Netlink userspace API
|
|
457
|
<UL>
|
|
458
|
<LI>Cluster configuration:
|
|
459
|
<UL>
|
|
460
|
<LI>Identities
|
|
461
|
<LI>Mode,
|
|
462
|
<LI>Access rights information
|
|
463
|
</UL>
|
|
464
|
<LI>MBC status information
|
|
465
|
<UL>
|
|
466
|
<LI>Identity
|
|
467
|
<LI>Service type
|
|
468
|
<LI>MAC bearers
|
|
469
|
<LI>Cell site information
|
|
470
|
<LI>Byte/packet counters
|
|
471
|
<LI>Handover attempts
|
|
472
|
<LI>Time slots
|
|
473
|
</UL>
|
|
474
|
</UL>
|
|
475
|
</UL>
|
|
476
|
</DIV>
|
|
477
|
<BR>
|
|
478
|
(page 18)<BR>
|
|
479
|
<HR>
|
|
480
|
<DIV ALIGN=CENTER>
|
|
481
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
482
|
</DIV>
|
|
483
|
<DIV ALIGN=LEFT>
|
|
484
|
<BR>
|
|
485
|
<BR>
|
|
486
|
DLC layer<BR>
|
|
487
|
<BR>
|
|
488
|
Data Link Control (DLC): net/dect/dlc.c<BR>
|
|
489
|
<BR>
|
|
490
|
<UL>
|
|
491
|
<LI>Routing
|
|
492
|
<UL>
|
|
493
|
<LI>Routing of C-Plane and U-Plane data to MAC connections
|
|
494
|
</UL>
|
|
495
|
</UL>
|
|
496
|
<BR>
|
|
497
|
<UL>
|
|
498
|
<LI>Logical MAC connection maintenance
|
|
499
|
<UL>
|
|
500
|
<LI>Multi Bearer setup
|
|
501
|
<LI>Multi Bearer handover
|
|
502
|
<LI>Passing of C-Plane and U-Plane data between higher and lower layers
|
|
503
|
<LI>Connection modification according to higher layer demands
|
|
504
|
</UL>
|
|
505
|
</UL>
|
|
506
|
</DIV>
|
|
507
|
<BR>
|
|
508
|
(page 19)<BR>
|
|
509
|
<HR>
|
|
510
|
<DIV ALIGN=CENTER>
|
|
511
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
512
|
</DIV>
|
|
513
|
<DIV ALIGN=LEFT>
|
|
514
|
<BR>
|
|
515
|
<BR>
|
|
516
|
DLC layer<BR>
|
|
517
|
<BR>
|
|
518
|
Data Link Control C-Plane (DLC): net/dect/dlc_cplane.c<BR>
|
|
519
|
<BR>
|
|
520
|
<UL>
|
|
521
|
<LI>Paging
|
|
522
|
<UL>
|
|
523
|
<LI>Passing of paging message to higher layer SAP
|
|
524
|
</UL>
|
|
525
|
</UL>
|
|
526
|
<BR>
|
|
527
|
<UL>
|
|
528
|
<LI>Lc entity
|
|
529
|
<UL>
|
|
530
|
<LI>C-Plane data fragmentation and reassembly
|
|
531
|
<LI>Checksumming
|
|
532
|
<LI>Instantiating of LAPC entities on connection requests
|
|
533
|
</UL>
|
|
534
|
</UL>
|
|
535
|
</DIV>
|
|
536
|
<BR>
|
|
537
|
(page 20)<BR>
|
|
538
|
<HR>
|
|
539
|
<DIV ALIGN=CENTER>
|
|
540
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
541
|
</DIV>
|
|
542
|
<DIV ALIGN=LEFT>
|
|
543
|
<BR>
|
|
544
|
<BR>
|
|
545
|
DLC layer<BR>
|
|
546
|
<BR>
|
|
547
|
Data Link Control C-Plane (DLC): net/dect/dlc_cplane.c<BR>
|
|
548
|
<BR>
|
|
549
|
<UL>
|
|
550
|
<LI>LAPC
|
|
551
|
<UL>
|
|
552
|
<LI>Similar to LAPD, LAPDm, ...
|
|
553
|
<LI>Unacknowledged point-to-point/broadcast communication
|
|
554
|
<LI>Point-to-point class A communication (window size = 1)
|
|
555
|
<LI>Point-to-point class B communication (window size = 8), suspend/resume
|
|
556
|
<LI>Segmentation of messages
|
|
557
|
</UL>
|
|
558
|
</UL>
|
|
559
|
</DIV>
|
|
560
|
<BR>
|
|
561
|
(page 21)<BR>
|
|
562
|
<HR>
|
|
563
|
<DIV ALIGN=CENTER>
|
|
564
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
565
|
</DIV>
|
|
566
|
<DIV ALIGN=LEFT>
|
|
567
|
<BR>
|
|
568
|
<BR>
|
|
569
|
DLC layer<BR>
|
|
570
|
<BR>
|
|
571
|
Data Link control C-Plane SAP: net/dect/dlc_s_sap.c, net/dect/dlc_b_sap:<BR>
|
|
572
|
<BR>
|
|
573
|
<UL>
|
|
574
|
<LI>S-SAP socket API:
|
|
575
|
<UL>
|
|
576
|
<LI>Socket interface to LAPC
|
|
577
|
<LI>send/recv/...
|
|
578
|
<LI>Ciphering API (get/setsockopt)
|
|
579
|
<LI>MAC connection attributes API (get/setsockopt)
|
|
580
|
</UL>
|
|
581
|
</UL>
|
|
582
|
<BR>
|
|
583
|
<UL>
|
|
584
|
<LI>B-SAP socket API:
|
|
585
|
<UL>
|
|
586
|
<LI>Socket interface to paging
|
|
587
|
<LI>send/recv/...
|
|
588
|
<LI>Duplicating received pages to all listeners
|
|
589
|
<LI>Page attributes specified through CMSG
|
|
590
|
</UL>
|
|
591
|
</UL>
|
|
592
|
</DIV>
|
|
593
|
<BR>
|
|
594
|
(page 22)<BR>
|
|
595
|
<HR>
|
|
596
|
<DIV ALIGN=CENTER>
|
|
597
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
598
|
</DIV>
|
|
599
|
<DIV ALIGN=LEFT>
|
|
600
|
<BR>
|
|
601
|
<BR>
|
|
602
|
DLC layer<BR>
|
|
603
|
<BR>
|
|
604
|
Data Link control U-Place: net/dect/dlc_uplane.c, dlc_lu1_sap.c:<BR>
|
|
605
|
<BR>
|
|
606
|
<UL>
|
|
607
|
<LI>Generic U-Plane:
|
|
608
|
<UL>
|
|
609
|
<LI>Framing (FBx entities)
|
|
610
|
<LI>Frame formats (LUx entities)
|
|
611
|
</UL>
|
|
612
|
</UL>
|
|
613
|
<BR>
|
|
614
|
<UL>
|
|
615
|
<LI>LU1 SAP:
|
|
616
|
<UL>
|
|
617
|
<LI>TRansparent UnProtected Service (TRUP)
|
|
618
|
<LI>Socket interface for Audio
|
|
619
|
<LI>Audio: min_delay service
|
|
620
|
<LI>Seamless Handover: frame offset advances depending on time slot
|
|
621
|
</UL>
|
|
622
|
</UL>
|
|
623
|
</DIV>
|
|
624
|
<BR>
|
|
625
|
(page 23)<BR>
|
|
626
|
<HR>
|
|
627
|
<DIV ALIGN=CENTER>
|
|
628
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
629
|
</DIV>
|
|
630
|
<DIV ALIGN=LEFT>
|
|
631
|
<BR>
|
|
632
|
<BR>
|
|
633
|
NWK layer<BR>
|
|
634
|
<BR>
|
|
635
|
Network layer: libdect<BR>
|
|
636
|
<BR>
|
|
637
|
<UL>
|
|
638
|
<LI>libdect overview:
|
|
639
|
<UL>
|
|
640
|
<LI>LCE (Link Control Entity), roughly comparable to GSM48 RR
|
|
641
|
<LI>MM (Mobility Management)
|
|
642
|
<LI>CC (Call Control)
|
|
643
|
<LI>SS (Supplementary services)
|
|
644
|
<LI>CLMS (Connectionless messaging service)
|
|
645
|
<LI>LLME (Lower layer management entity)
|
|
646
|
<LI>Link and transaction management
|
|
647
|
<LI>Message/TLV encoding/decoding
|
|
648
|
<LI>Message routing
|
|
649
|
</UL>
|
|
650
|
</UL>
|
|
651
|
</DIV>
|
|
652
|
<BR>
|
|
653
|
(page 24)<BR>
|
|
654
|
<HR>
|
|
655
|
<DIV ALIGN=CENTER>
|
|
656
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
657
|
</DIV>
|
|
658
|
<DIV ALIGN=LEFT>
|
|
659
|
<BR>
|
|
660
|
<BR>
|
|
661
|
NWK layer<BR>
|
|
662
|
<BR>
|
|
663
|
Network layer: libdect<BR>
|
|
664
|
<BR>
|
|
665
|
<UL>
|
|
666
|
<LI>libdect Overview:
|
|
667
|
<UL>
|
|
668
|
<LI>User registers one or more ops structures: lce_ops, mm_ops, cc_ops, ...
|
|
669
|
<LI>Callbacks for indication and confirmation primitives
|
|
670
|
<LI>Functions for request and result primitives
|
|
671
|
<LI>Encapsulated parameter structures, reference counted parameters and IEs
|
|
672
|
<LI>Support functions for authentication, SS, debugging, ...
|
|
673
|
</UL>
|
|
674
|
</UL>
|
|
675
|
</DIV>
|
|
676
|
<BR>
|
|
677
|
(page 25)<BR>
|
|
678
|
<HR>
|
|
679
|
<DIV ALIGN=CENTER>
|
|
680
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
681
|
</DIV>
|
|
682
|
<DIV ALIGN=LEFT>
|
|
683
|
<BR>
|
|
684
|
<BR>
|
|
685
|
NWK layer<BR>
|
|
686
|
<BR>
|
|
687
|
Network layer: libdect<BR>
|
|
688
|
<FONT SIZE=-3><BR>
|
|
689
|
/** MM_ACCESS_RIGHTS primitive parameters. */<BR>
|
|
690
|
struct dect_mm_access_rights_param {<BR>
|
|
691
|
struct dect_ie_collection common;<BR>
|
|
692
|
struct dect_ie_portable_identity *portable_identity;<BR>
|
|
693
|
struct dect_ie_list fixed_identity;<BR>
|
|
694
|
struct dect_ie_location_area *location_area;<BR>
|
|
695
|
struct dect_ie_auth_type *auth_type;<BR>
|
|
696
|
struct dect_ie_cipher_info *cipher_info;<BR>
|
|
697
|
struct dect_ie_zap_field *zap_field;<BR>
|
|
698
|
struct dect_ie_setup_capability *setup_capability;<BR>
|
|
699
|
struct dect_ie_terminal_capability *terminal_capability;<BR>
|
|
700
|
struct dect_ie_service_class *service_class;<BR>
|
|
701
|
struct dect_ie_model_identifier *model_identifier;<BR>
|
|
702
|
struct dect_ie_reject_reason *reject_reason;<BR>
|
|
703
|
struct dect_ie_duration *duration;<BR>
|
|
704
|
struct dect_ie_iwu_to_iwu *iwu_to_iwu;<BR>
|
|
705
|
struct dect_ie_escape_to_proprietary *escape_to_proprietary;<BR>
|
|
706
|
struct dect_ie_codec_list *codec_list;<BR>
|
|
707
|
};<BR>
|
|
708
|
</FONT></DIV>
|
|
709
|
<BR>
|
|
710
|
(page 26)<BR>
|
|
711
|
<HR>
|
|
712
|
<DIV ALIGN=CENTER>
|
|
713
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
714
|
</DIV>
|
|
715
|
<DIV ALIGN=LEFT>
|
|
716
|
<BR>
|
|
717
|
<BR>
|
|
718
|
NWK layer<BR>
|
|
719
|
<BR>
|
|
720
|
Network layer: libdect<BR>
|
|
721
|
<FONT SIZE=-3><BR>
|
|
722
|
struct dect_mm_ops {<BR>
|
|
723
|
size_t priv_size;<BR>
|
|
724
|
/**< Size of the private storage area of an MM endpoint */<BR>
|
|
725
|
void (*mm_access_rights_ind)(struct dect_handle *dh,<BR>
|
|
726
|
struct dect_mm_endpoint *mme,<BR>
|
|
727
|
struct dect_mm_access_rights_param *param);<BR>
|
|
728
|
/**< MM_ACCESS_RIGHTS-ind primitive */<BR>
|
|
729
|
void (*mm_access_rights_cfm)(struct dect_handle *dh,<BR>
|
|
730
|
struct dect_mm_endpoint *mme, bool accept,<BR>
|
|
731
|
struct dect_mm_access_rights_param *param);<BR>
|
|
732
|
/**< MM_ACCESS_RIGHTS-cfm primitive */<BR>
|
|
733
|
...<BR>
|
|
734
|
};<BR>
|
|
735
|
<BR>
|
|
736
|
extern int dect_mm_access_rights_req(struct dect_handle *dh, struct dect_mm_endpoint *mme,<BR>
|
|
737
|
const struct dect_mm_access_rights_param *param);<BR>
|
|
738
|
extern void dect_mm_access_rights_res(struct dect_handle *dh, struct dect_mm_endpoint *mme,<BR>
|
|
739
|
bool accept, const struct dect_mm_access_rights_param *param); <BR>
|
|
740
|
<BR>
|
|
741
|
</FONT></DIV>
|
|
742
|
<BR>
|
|
743
|
(page 27)<BR>
|
|
744
|
<HR>
|
|
745
|
<DIV ALIGN=CENTER>
|
|
746
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
747
|
</DIV>
|
|
748
|
<DIV ALIGN=LEFT>
|
|
749
|
<BR>
|
|
750
|
<BR>
|
|
751
|
NWK layer<BR>
|
|
752
|
<BR>
|
|
753
|
Network layer: libdect<BR>
|
|
754
|
<FONT SIZE=-3><BR>
|
|
755
|
static DECT_SFMT_MSG_DESC(mm_access_rights_request,<BR>
|
|
756
|
DECT_SFMT_IE(DECT_IE_PORTABLE_IDENTITY, IE_NONE, IE_MANDATORY, 0),<BR>
|
|
757
|
DECT_SFMT_IE(DECT_IE_AUTH_TYPE, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
758
|
DECT_SFMT_IE(DECT_IE_CIPHER_INFO, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
759
|
DECT_SFMT_IE(DECT_IE_SETUP_CAPABILITY, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
760
|
DECT_SFMT_IE(DECT_IE_TERMINAL_CAPABILITY, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
761
|
DECT_SFMT_IE(DECT_IE_IWU_TO_IWU, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
762
|
DECT_SFMT_IE(DECT_IE_MODEL_IDENTIFIER, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
763
|
DECT_SFMT_IE(DECT_IE_ESCAPE_TO_PROPRIETARY, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
764
|
DECT_SFMT_IE(DECT_IE_CODEC_LIST, IE_NONE, IE_OPTIONAL, 0),<BR>
|
|
765
|
DECT_SFMT_IE_END_MSG<BR>
|
|
766
|
);<BR>
|
|
767
|
</FONT></DIV>
|
|
768
|
<BR>
|
|
769
|
(page 28)<BR>
|
|
770
|
<HR>
|
|
771
|
<DIV ALIGN=CENTER>
|
|
772
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
773
|
</DIV>
|
|
774
|
<DIV ALIGN=LEFT>
|
|
775
|
<BR>
|
|
776
|
<BR>
|
|
777
|
NWK layer<BR>
|
|
778
|
<BR>
|
|
779
|
Network layer: libdect<BR>
|
|
780
|
<FONT SIZE=-3><BR>
|
|
781
|
NWK: 05 42 0b 02 01 88 0c 08 1b 42 27 01 4c 5c 44 84 |.B.......B'.L\\D.|<BR>
|
|
782
|
NWK: 0e 08 9e 01 7e 0c 42 ae ec ff |....~.B...|<BR>
|
|
783
|
{MM-KEY-ALLOCATE} message:<BR>
|
|
784
|
IE: <<ALLOCATION-TYPE>> id: b len: 4 dst: 0xfcf440<BR>
|
|
785
|
authentication algorithm: DSAA (1)<BR>
|
|
786
|
authentication key number: 8<BR>
|
|
787
|
authentication code number: 8<BR>
|
|
788
|
IE: <<RAND>> id: c len: 10 dst: 0xfcf460<BR>
|
|
789
|
value: 84445c4c0127421b<BR>
|
|
790
|
IE: <<RS>> id: e len: 10 dst: 0xfcf480<BR>
|
|
791
|
value: ffecae420c7e019e<BR>
|
|
792
|
<BR>
|
|
793
|
NWK: 85 40 0a 03 01 48 00 0c 08 de a7 66 4d 34 fb c2 |.@...H.....fM4..|<BR>
|
|
794
|
NWK: 7f 0d 04 85 6a 5f 9e |....j_.|<BR>
|
|
795
|
{MM-AUTHENTICATION-REQUEST} message:<BR>
|
|
796
|
IE: <<AUTH-TYPE>> id: a len: 5 dst: 0xfcf5e0<BR>
|
|
797
|
authentication algorithm: DSAA (1)<BR>
|
|
798
|
authentication key type: Authentication code (4)<BR>
|
|
799
|
authentication key number: 8<BR>
|
|
800
|
cipher key number: 0<BR>
|
|
801
|
INC: 0 DEF: 0 TXC: 0 UPC: 0<BR>
|
|
802
|
IE: <<RAND>> id: c len: 10 dst: 0xfcf600<BR>
|
|
803
|
value: 7fc2fb344d66a7de<BR>
|
|
804
|
IE: <<RES>> id: d len: 6 dst: 0xfcf620<BR>
|
|
805
|
value: 9e5f6a85<BR>
|
|
806
|
</FONT></DIV>
|
|
807
|
<BR>
|
|
808
|
(page 29)<BR>
|
|
809
|
<HR>
|
|
810
|
<DIV ALIGN=CENTER>
|
|
811
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
812
|
</DIV>
|
|
813
|
<DIV ALIGN=LEFT>
|
|
814
|
<BR>
|
|
815
|
<BR>
|
|
816
|
NWK layer<BR>
|
|
817
|
<BR>
|
|
818
|
Network layer Link Control Entity: src/lce.c<BR>
|
|
819
|
<BR>
|
|
820
|
<UL>
|
|
821
|
<LI>Link maintenance
|
|
822
|
<UL>
|
|
823
|
<LI>Paging
|
|
824
|
<LI>Direct (PP initiated) and indirect (paged) link setup
|
|
825
|
<LI>Link attribute modification
|
|
826
|
<LI>Cipher management in coordination with MM
|
|
827
|
</UL>
|
|
828
|
</UL>
|
|
829
|
</DIV>
|
|
830
|
<BR>
|
|
831
|
(page 30)<BR>
|
|
832
|
<HR>
|
|
833
|
<DIV ALIGN=CENTER>
|
|
834
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
835
|
</DIV>
|
|
836
|
<DIV ALIGN=LEFT>
|
|
837
|
<BR>
|
|
838
|
<BR>
|
|
839
|
NWK layer<BR>
|
|
840
|
<BR>
|
|
841
|
Mobility Management: src/mm.c<BR>
|
|
842
|
<BR>
|
|
843
|
<UL>
|
|
844
|
<LI>Access rights procedures
|
|
845
|
<UL>
|
|
846
|
<LI>Pairing
|
|
847
|
<LI>Capability exchange
|
|
848
|
<LI>Usually coupled with UAK key allocation
|
|
849
|
<LI>Access rights revocation
|
|
850
|
</UL>
|
|
851
|
</UL>
|
|
852
|
<BR>
|
|
853
|
<UL>
|
|
854
|
<LI>Key allocation procedure
|
|
855
|
<UL>
|
|
856
|
<LI>Allocates UAK
|
|
857
|
<LI>Derived from AC (Authentication Code)
|
|
858
|
</UL>
|
|
859
|
</UL>
|
|
860
|
</DIV>
|
|
861
|
<BR>
|
|
862
|
(page 31)<BR>
|
|
863
|
<HR>
|
|
864
|
<DIV ALIGN=CENTER>
|
|
865
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
866
|
</DIV>
|
|
867
|
<DIV ALIGN=LEFT>
|
|
868
|
<BR>
|
|
869
|
<BR>
|
|
870
|
NWK layer<BR>
|
|
871
|
<BR>
|
|
872
|
Mobility Management: src/mm.c<BR>
|
|
873
|
<BR>
|
|
874
|
<UL>
|
|
875
|
<LI>Authentication procedure
|
|
876
|
<UL>
|
|
877
|
<LI>Optional mutual authentication, usually PP only or even none
|
|
878
|
<LI>Seperate procedure or integrated into key allocation
|
|
879
|
<LI>UAK or UPI (User personal Identity)
|
|
880
|
<LI>Session key derivation
|
|
881
|
</UL>
|
|
882
|
</UL>
|
|
883
|
<BR>
|
|
884
|
<UL>
|
|
885
|
<LI>Ciphering procedure
|
|
886
|
<UL>
|
|
887
|
<LI>Ciphering with either SDK or DCK
|
|
888
|
<LI>Always initiated by PP, FP may suggest ciphering to PP
|
|
889
|
</UL>
|
|
890
|
</UL>
|
|
891
|
</DIV>
|
|
892
|
<BR>
|
|
893
|
(page 32)<BR>
|
|
894
|
<HR>
|
|
895
|
<DIV ALIGN=CENTER>
|
|
896
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
897
|
</DIV>
|
|
898
|
<DIV ALIGN=LEFT>
|
|
899
|
<BR>
|
|
900
|
<BR>
|
|
901
|
NWK layer<BR>
|
|
902
|
<BR>
|
|
903
|
Mobility Management: src/mm.c<BR>
|
|
904
|
<BR>
|
|
905
|
<UL>
|
|
906
|
<LI>Location procedures
|
|
907
|
<UL>
|
|
908
|
<LI>Informes FP of PP location (cell, cluster)
|
|
909
|
<LI>Periodic or after location area change
|
|
910
|
<LI>Capability exchange
|
|
911
|
<LI>TPUI allocation
|
|
912
|
<LI>Detach
|
|
913
|
</UL>
|
|
914
|
</UL>
|
|
915
|
<BR>
|
|
916
|
<UL>
|
|
917
|
<LI>Other
|
|
918
|
<UL>
|
|
919
|
<LI>Identity procedurs
|
|
920
|
<LI>External protocol information procedures
|
|
921
|
</UL>
|
|
922
|
</UL>
|
|
923
|
</DIV>
|
|
924
|
<BR>
|
|
925
|
(page 33)<BR>
|
|
926
|
<HR>
|
|
927
|
<DIV ALIGN=CENTER>
|
|
928
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
929
|
</DIV>
|
|
930
|
<DIV ALIGN=LEFT>
|
|
931
|
<BR>
|
|
932
|
<BR>
|
|
933
|
NWK layer<BR>
|
|
934
|
<BR>
|
|
935
|
Call Control; src/cc.c<BR>
|
|
936
|
<BR>
|
|
937
|
<UL>
|
|
938
|
<LI>Call procedures
|
|
939
|
<UL>
|
|
940
|
<LI>Call setup, modification, termination, ..
|
|
941
|
<LI>Codec negotiation
|
|
942
|
<LI>Call related supplementary services (CRSS)
|
|
943
|
<LI>U-Plane setup and maintenance
|
|
944
|
</UL>
|
|
945
|
</UL>
|
|
946
|
</DIV>
|
|
947
|
<BR>
|
|
948
|
(page 34)<BR>
|
|
949
|
<HR>
|
|
950
|
<DIV ALIGN=CENTER>
|
|
951
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
952
|
</DIV>
|
|
953
|
<DIV ALIGN=LEFT>
|
|
954
|
<BR>
|
|
955
|
<BR>
|
|
956
|
NWK layer<BR>
|
|
957
|
<BR>
|
|
958
|
Connectionless messaging service: src/clms.c<BR>
|
|
959
|
<BR>
|
|
960
|
<UL>
|
|
961
|
<LI>Connectionless packet service
|
|
962
|
</UL>
|
|
963
|
</DIV>
|
|
964
|
<BR>
|
|
965
|
(page 35)<BR>
|
|
966
|
<HR>
|
|
967
|
<DIV ALIGN=CENTER>
|
|
968
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
969
|
</DIV>
|
|
970
|
<DIV ALIGN=LEFT>
|
|
971
|
<BR>
|
|
972
|
<BR>
|
|
973
|
IWU<BR>
|
|
974
|
<BR>
|
|
975
|
Interworking Unit: asterisk, channels/chan_dect.c<BR>
|
|
976
|
<BR>
|
|
977
|
<UL>
|
|
978
|
<LI>Asterisk Channel driver
|
|
979
|
<UL>
|
|
980
|
<LI>Interacts with libdect
|
|
981
|
<LI>Supports access rights, key allocation, authentication, chiphering, ...
|
|
982
|
<LI>Asterisk DB used for storing subscription data
|
|
983
|
<LI>Narrow-band audio, wide-band unfinished
|
|
984
|
</UL>
|
|
985
|
</UL>
|
|
986
|
</DIV>
|
|
987
|
<BR>
|
|
988
|
(page 36)<BR>
|
|
989
|
<HR>
|
|
990
|
<DIV ALIGN=CENTER>
|
|
991
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
992
|
</DIV>
|
|
993
|
<DIV ALIGN=LEFT>
|
|
994
|
<BR>
|
|
995
|
<BR>
|
|
996
|
Support tools<BR>
|
|
997
|
<BR>
|
|
998
|
<UL>
|
|
999
|
<LI>libnl-dect:
|
|
1000
|
<UL>
|
|
1001
|
<LI>Netlink API for configuration and notifications
|
|
1002
|
<LI>Example tools used for configuration
|
|
1003
|
</UL>
|
|
1004
|
</UL>
|
|
1005
|
<BR>
|
|
1006
|
<UL>
|
|
1007
|
<LI>dectmon:
|
|
1008
|
<UL>
|
|
1009
|
<LI>DECT protocol decoder using raw sockets
|
|
1010
|
<LI>Multiple transceiver support
|
|
1011
|
<LI>Protocol decoding
|
|
1012
|
<LI>Decryption, life audio
|
|
1013
|
<LI>Interactive command line interface
|
|
1014
|
<LI>Can interact with monitored FPs
|
|
1015
|
</UL>
|
|
1016
|
</UL>
|
|
1017
|
</DIV>
|
|
1018
|
<BR>
|
|
1019
|
(page 37)<BR>
|
|
1020
|
<HR>
|
|
1021
|
<DIV ALIGN=CENTER>
|
|
1022
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
1023
|
</DIV>
|
|
1024
|
<DIV ALIGN=LEFT>
|
|
1025
|
<BR>
|
|
1026
|
<BR>
|
|
1027
|
Support tools<BR>
|
|
1028
|
<BR>
|
|
1029
|
<UL>
|
|
1030
|
<LI>libpcap
|
|
1031
|
<UL>
|
|
1032
|
<LI>libpcap with DECT raw socket support
|
|
1033
|
</UL>
|
|
1034
|
</UL>
|
|
1035
|
<BR>
|
|
1036
|
<UL>
|
|
1037
|
<LI>ASL
|
|
1038
|
<UL>
|
|
1039
|
<LI>ASL macro assembler
|
|
1040
|
<LI>Used for firmware assembly
|
|
1041
|
<LI>Patched version with support for modern chipsets (SC1445x/8x)
|
|
1042
|
</UL>
|
|
1043
|
</UL>
|
|
1044
|
<BR>
|
|
1045
|
<UL>
|
|
1046
|
<LI>Disassembler
|
|
1047
|
<UL>
|
|
1048
|
<LI>Firmware disassembler
|
|
1049
|
<LI>Unreleased so far
|
|
1050
|
</UL>
|
|
1051
|
</UL>
|
|
1052
|
</DIV>
|
|
1053
|
<BR>
|
|
1054
|
(page 38)<BR>
|
|
1055
|
<HR>
|
|
1056
|
<DIV ALIGN=CENTER>
|
|
1057
|
<IMG SRC="osmocom_dect.png" ALT="osmocom_dect.png">
|
|
1058
|
</DIV>
|
|
1059
|
<DIV ALIGN=LEFT>
|
|
1060
|
<BR>
|
|
1061
|
<BR>
|
|
1062
|
Future work<BR>
|
|
1063
|
<BR>
|
|
1064
|
<UL>
|
|
1065
|
<LI>Finishing wideband support
|
|
1066
|
<LI>CoA Type III support
|
|
1067
|
<LI>GAP/DECT-NG profile compliance
|
|
1068
|
<LI>S1445x SoC support
|
|
1069
|
<LI>DVB-T SDR RX support
|
|
1070
|
</UL>
|
|
1071
|
(page 39)<BR>
|
|
1072
|
</BODY>
|
|
1073
|
</HTML>
|
