| Jacob Erlbeck | 409f980 | 2015-11-30 18:06:50 +0100 | [diff] [blame^] | 1 | /* gprs_coding_scheme.cpp |
| 2 | * |
| 3 | * Copyright (C) 2015 by Sysmocom s.f.m.c. GmbH |
| 4 | * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | |
| 22 | #include "gprs_coding_scheme.h" |
| 23 | |
| 24 | static struct { |
| 25 | struct { |
| 26 | unsigned bytes; |
| 27 | unsigned ext_bits; |
| 28 | } uplink, downlink; |
| 29 | const char *name; |
| 30 | } mcs_info[GprsCodingScheme::NUM_SCHEMES] = { |
| 31 | {{0, 0}, {0, 0}, "UNKNOWN"}, |
| 32 | {{23, 0}, {23, 0}, "CS-1"}, |
| 33 | {{33, 7}, {33, 7}, "CS-2"}, |
| 34 | {{39, 3}, {39, 3}, "CS-3"}, |
| 35 | {{53, 7}, {53, 7}, "CS-4"}, |
| 36 | |
| 37 | {{26, 1}, {26, 1}, "MCS-1"}, |
| 38 | {{32, 1}, {32, 1}, "MCS-2"}, |
| 39 | {{41, 1}, {41, 1}, "MCS-3"}, |
| 40 | {{48, 1}, {48, 1}, "MCS-4"}, |
| 41 | |
| 42 | {{60, 7}, {59, 6}, "MCS-5"}, |
| 43 | {{78, 7}, {77, 6}, "MCS-6"}, |
| 44 | {{118, 2}, {117, 4}, "MCS-7"}, |
| 45 | {{142, 2}, {141, 4}, "MCS-8"}, |
| 46 | {{154, 2}, {153, 4}, "MCS-9"}, |
| 47 | }; |
| 48 | |
| 49 | |
| 50 | GprsCodingScheme GprsCodingScheme::getBySizeUL(unsigned size) |
| 51 | { |
| 52 | switch (size) { |
| 53 | case 23: return GprsCodingScheme(CS1); |
| 54 | case 27: return GprsCodingScheme(MCS1); |
| 55 | case 33: return GprsCodingScheme(MCS2); |
| 56 | case 34: return GprsCodingScheme(CS2); |
| 57 | case 40: return GprsCodingScheme(CS3); |
| 58 | case 42: return GprsCodingScheme(MCS3); |
| 59 | case 49: return GprsCodingScheme(MCS4); |
| 60 | case 54: return GprsCodingScheme(CS4); |
| 61 | case 61: return GprsCodingScheme(MCS5); |
| 62 | case 79: return GprsCodingScheme(MCS6); |
| 63 | case 119: return GprsCodingScheme(MCS7); |
| 64 | case 143: return GprsCodingScheme(MCS8); |
| 65 | case 155: return GprsCodingScheme(MCS9); |
| 66 | } |
| 67 | |
| 68 | return GprsCodingScheme(UNKNOWN); |
| 69 | } |
| 70 | |
| 71 | unsigned int GprsCodingScheme::sizeUL() const |
| 72 | { |
| 73 | return maxBytesUL() + (spareBitsUL() ? 1 : 0); |
| 74 | } |
| 75 | |
| 76 | unsigned int GprsCodingScheme::maxBytesUL() const |
| 77 | { |
| 78 | return mcs_info[m_scheme].uplink.bytes; |
| 79 | } |
| 80 | |
| 81 | unsigned int GprsCodingScheme::spareBitsUL() const |
| 82 | { |
| 83 | return mcs_info[m_scheme].uplink.ext_bits; |
| 84 | } |
| 85 | |
| 86 | unsigned int GprsCodingScheme::sizeDL() const |
| 87 | { |
| 88 | return maxBytesDL() + (spareBitsDL() ? 1 : 0); |
| 89 | } |
| 90 | |
| 91 | unsigned int GprsCodingScheme::maxBytesDL() const |
| 92 | { |
| 93 | return mcs_info[m_scheme].downlink.bytes; |
| 94 | } |
| 95 | |
| 96 | unsigned int GprsCodingScheme::spareBitsDL() const |
| 97 | { |
| 98 | return mcs_info[m_scheme].downlink.ext_bits; |
| 99 | } |
| 100 | |
| 101 | const char *GprsCodingScheme::name() const |
| 102 | { |
| 103 | return mcs_info[m_scheme].name; |
| 104 | } |