From f1df46a5c04d38f155cd8f8c8315eeb1f3fc7c2e Mon Sep 17 00:00:00 2001 From: Piotr Krysik Date: Sat, 27 Jun 2009 13:14:30 +0200 Subject: added files from openbts for tch/f decoding and removed openbts --- src/lib/decoder/openbtsstuff/GSMTDMA.h | 358 +++++++++++++++++++++++++++++++++ 1 file changed, 358 insertions(+) create mode 100644 src/lib/decoder/openbtsstuff/GSMTDMA.h (limited to 'src/lib/decoder/openbtsstuff/GSMTDMA.h') diff --git a/src/lib/decoder/openbtsstuff/GSMTDMA.h b/src/lib/decoder/openbtsstuff/GSMTDMA.h new file mode 100644 index 0000000..3b55b94 --- /dev/null +++ b/src/lib/decoder/openbtsstuff/GSMTDMA.h @@ -0,0 +1,358 @@ +/**@file Common-use GSM declarations, most from the GSM 04.xx and 05.xx series. */ +/* +* Copyright 2008 Free Software Foundation, Inc. +* +* This software is distributed under the terms of the GNU Public License. +* See the COPYING file in the main directory for details. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +*/ + + + +#ifndef GSMTDMA_H +#define GSMTDMA_H + + +#include "GSMCommon.h" + + +namespace GSM { + + +/** + A description of a channel's multiplexing pattern. + From GSM 05.02 Clause 7. + This object encodes a line from tables 1-4 in the spec. + The columns of interest in this encoding are: + - 1, Channel Designation + - 2, Subchannel + - 3, Direction + - 4, Allowable Time Slot Assignments + - 5, Allowable RF Channel Assignments + - 7, Repeat Length in TDMA Frames + - 8, Interleaved Block TDMA Frame Mapping + + Col 6, Burst Type, is implied by 1 & 2 and encoded into the transcevier source code. +*/ +class TDMAMapping { + + public: + + /// The longest "repeat length" of any channel we support is 104 for the SACCH/TF. + static const unsigned mMaxRepeatLength = 104; + + private: + + TypeAndOffset mTypeAndOffset; ///< col 1, 2, encoded as per GSM 04.08 10.5.2.5 + bool mDownlink; ///< col 3, true for downlink channels + bool mUplink; ///< col 3, true for uplink channels + char mAllowedSlots; ///< col 4, an 8-bit mask + bool mC0Only; ///< col 5, true if channel is limited to C0 + unsigned mRepeatLength; ///< col 7 + unsigned mNumFrames; ///< number of occupied frames in col 8 + const unsigned *mFrameMapping; ///< col 8 + unsigned mReverseMapping[mMaxRepeatLength]; ///< index reversal of mapping, -1 means unused + + + public: + + + /** + Construct a TDMAMapping, encoding one line of GSM 05.02 Clause 7 Tables 1-4. + @param wTypeAndOffset Encoding of "Channel designnation". See GSM 04.08 10.5.2.5. + @param wDownlink True for downlink and bidirectional hannels + @param wUplink True for uplink and bidirectional channels + @param wRepeatLength "Repeat Length in TDMA Frames" + @param wNumFrames Number of occupied TDMA frames in frame mapping. + @param wFrameMapping "Interleaved Block TDMA Frame Mapping" -- MUST PERSIST!! + */ + TDMAMapping(TypeAndOffset wTypeAndOffset, + bool wDownlink, bool wUplink, char wAllowedSlots, bool wC0Only, + unsigned wRepeatLength, unsigned wNumFrames, const unsigned *wFrameMapping); + + /** Given a count of frames sent, return the corresponding frame number. */ + unsigned frameMapping(unsigned count) const + { return mFrameMapping[count % mNumFrames]; } + + /** Given a frame number, return the corresponding count, modulo patten length. */ + int reverseMapping(unsigned FN) const + { return mReverseMapping[FN % mRepeatLength]; } + + /**@name Simple accessors. */ + //@{ + unsigned numFrames() const { return mNumFrames; } + + unsigned repeatLength() const { return mRepeatLength; } + + TypeAndOffset typeAndOffset() const { return mTypeAndOffset; } + + bool uplink() const { return mUplink; } + + bool downlink() const { return mDownlink; } + + bool C0Only() const { return mC0Only; } + //@} + + ///< Return true if this channel is allowed on this slot. + bool allowedSlot(unsigned slot) const + { return mAllowedSlots & (1<