diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8db6d652f..3b9edfa16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 ## v4.1.0 (Unreleased)
 
+### Enhancements
+
+- [#214](https://github.com/arkedge/c2a-core/pull/214): CCSDS の主 MOBC 向け Data Link Layer のコードを Core 管理にする
+
 ### Fixed
 
 - [#193](https://github.com/arkedge/c2a-core/pull/193): VCDU を AOS transfer frame に rename する
@@ -30,6 +34,27 @@
      - `#include <src_core/tlm_cmd/ccsds/space_packet_typedef.h>` -> `#include <src_core/tlm_cmd/ccsds/space_packet_protocol/space_packet_typedef.h>`
      - `#include <src_core/tlm_cmd/ccsds/tlm_space_packet.h>` -> `#include <src_core/tlm_cmd/ccsds/space_packet_protocol/tlm_space_packet.h>`
      - `#include <src_core/tlm_cmd/ccsds/cmd_space_packet.h>` -> `#include <src_core/tlm_cmd/ccsds/space_packet_protocol/cmd_space_packet.h>`
+- [#214](https://github.com/arkedge/c2a-core/pull/214): 影響範囲は MOBC の CCSDS Data Link Layer の実装
+  1. AOS Space Data Link Protocol の実装を c2a-core のものに切り替える
+     1. `src_user/tlm_cmd/ccsds/` 内の既存の実装を消す
+        - `aos_transfer_frame.{c,h}`
+        - `multiplexing_protocol_data_unit.{c,h}`
+        - `tcp_to_m_pdu.{c,h}`
+     1. c2a-core の実装を使うように切り替える
+        - `src_core/ccsds/aos_space_data_link_protocol/` 内のソースファイルをビルド対象に追加する
+        - CMake の場合， `C2A_USE_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL` option を `ON` にするだけでよい (C2A user top の `CMakeLists.txt`)
+          - `examples/mobc/CMakeLists.txt` を参考にできる．
+     1. コンパイルが通らないところを直す．ファイルの場所が変わったことによる include path の修正が想定される．
+  1. TC Space Data Link Protocol の実装を c2a-core のものに切り替える
+     1. `src_user/tlm_cmd/ccsds/` 内の既存の実装を消す
+        - `tc_segment.{c,h}`
+        - `tc_transfer_frame.{c,h}`
+     1. c2a-core の実装を使うように切り替える
+        - `src_core/ccsds/tc_space_data_link_protocol/` 内のソースファイルをビルド対象に追加する
+        - CMake の場合， `C2A_USE_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL` option を `ON` にするだけでよい (C2A user top の `CMakeLists.txt`)
+          - `examples/mobc/CMakeLists.txt` を参考にできる．
+     1. コンパイルが通らないところを直す．ファイルの場所が変わったことによる include path の修正が想定される．
+
 
 ## v4.0.1 (2023-11-09)
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f0c5ea1c6..95580c75d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,11 @@ option(C2A_USE_ALL_CORE_APPS        "Use C2A-core all Applications" ON)
 option(C2A_USE_ALL_CORE_TEST_APPS   "Use C2A-core all Test Applications" ON)
 option(C2A_USE_ALL_CORE_LIB         "Use C2A-core all library" ON)
 
+## C2A CCSDS select
+# See alse; /docs/core/ccsds.md
+option(C2A_USE_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL  "Use C2A-core CCSDS AOS SPACE DATA LINK PROTOCOL implementation" OFF)
+option(C2A_USE_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL   "Use C2A-core CCSDS TC SPACE DATA LINK PROTOCOL implementation" OFF)
+
 option(C2A_USE_SIMPLE_LIBC          "Use C2A-core hosted simple libc (c2a-core/library/libc) implementation" OFF)
 
 set(C2A_CORE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
@@ -99,4 +104,14 @@ if(C2A_USE_ALL_CORE_LIB)
   target_sources(${PROJECT_NAME} PUBLIC $<TARGET_OBJECTS:C2A_CORE_LIB>)
 endif()
 
+if(C2A_USE_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL)
+  add_subdirectory(tlm_cmd/ccsds/aos_space_data_link_protocol)
+  target_sources(${PROJECT_NAME} PUBLIC $<TARGET_OBJECTS:C2A_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL>)
+endif()
+
+if(C2A_USE_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL)
+  add_subdirectory(tlm_cmd/ccsds/tc_space_data_link_protocol)
+  target_sources(${PROJECT_NAME} PUBLIC $<TARGET_OBJECTS:C2A_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL>)
+endif()
+
 include(common.cmake)
diff --git a/docs/README.md b/docs/README.md
index 777af589c..c624ce479 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -37,6 +37,7 @@ C2A に関する説明の棲み分けは，次のようになっています．
 1. Core Layer
    1. Overview
    1. [Communication](./core/communication.md)
+   1. [CCSDS](./core/ccsds.md)
    1. [Tips](./core/tips.md)
 1. Component Driver
    1. [Overview](./component_driver/overview.md)
diff --git a/docs/core/ccsds.md b/docs/core/ccsds.md
new file mode 100644
index 000000000..869f4c506
--- /dev/null
+++ b/docs/core/ccsds.md
@@ -0,0 +1,24 @@
+# CCSDS
+
+## 概要
+C2A Core に実装された CCSDS (Consultative Committee for Space Data Systems) によって規定される宇宙データシステムの標準規格  Space Communications Protocols についてまとめる．
+CCSDS 技術仕様文書は [ブルーブック（Blue Books）：全85文書](https://stage.tksc.jaxa.jp/ccsds/docs/doc_blue.html) を参照すること．
+
+
+## Space Packet Protocol
+[`tlm_cmd/ccsds/space_packet_protocol`](/tlm_cmd/ccsds/space_packet_protocol/) に配置される．
+
+[Core/Communication.md#c2a-標準-space-packet-定義](./communication.md#c2a-標準-space-packet-定義) などを参照のこと．
+
+
+## AOS Space Data Link Protocol / TC Space Data Link Protocol
+[`tlm_cmd/ccsds/aos_space_data_link_protocol`](/tlm_cmd/ccsds/aos_space_data_link_protocol/), [`tlm_cmd/ccsds/tc_space_data_link_protocol`](/tlm_cmd/ccsds/tc_space_data_link_protocol/) に配置される．
+
+基本的には，地上局と通信する無線機 (STX や SRX) に接続される OBC (MOBC など) 向けのコードとなる．
+
+AOS Space Data Link Protocol や TC Space Data Link Protocol は，様々な設計パラメタがあるが，ここでのコードは，ある特定の設計パラメタにおける実装であることに注意すること．
+したがって，現時点では汎用性の低いコードが配置されている．
+（今後，適切にリファクタリングする予定．）
+
+また，本コードをコンパイル対象に加えると，少なくない RAM を static に確保してしまうため，デフォルトではコンパイル対象には含まれない．
+コンパイル対象に含める場合は， FIXME: で設定すること．
diff --git a/examples/mobc/CMakeLists.txt b/examples/mobc/CMakeLists.txt
index 77f97b445..0583bd82d 100644
--- a/examples/mobc/CMakeLists.txt
+++ b/examples/mobc/CMakeLists.txt
@@ -20,6 +20,10 @@ option(C2A_BUILD_WITH_SILS_MOCKUP "Build C2A with SILS mockup for check undefine
 
 option(C2A_BUILD_FOR_SILS "Build C2A for SILS target" ON)
 
+# core に同梱されている CCSDS の実装を使う
+set(C2A_USE_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL ON)
+set(C2A_USE_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL ON)
+
 if(C2A_BUILD_WITH_SILS_MOCKUP)
   set(C2A_BUILD_AS_CXX OFF)
 endif()
diff --git a/examples/mobc/src/src_user/applications/component_service/csrv_gs.h b/examples/mobc/src/src_user/applications/component_service/csrv_gs.h
index 594e2900a..e23135c1d 100644
--- a/examples/mobc/src/src_user/applications/component_service/csrv_gs.h
+++ b/examples/mobc/src/src_user/applications/component_service/csrv_gs.h
@@ -8,8 +8,8 @@
 #include <stdint.h>
 
 #include "../../component_driver/com/gs.h"
-#include "../../tlm_cmd/ccsds/tcp_to_m_pdu.h"
-#include "../../tlm_cmd/ccsds/aos_transfer_frame.h"
+#include <src_core/tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.h>
+#include <src_core/tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.h>
 #include <src_core/system/application_manager/app_info.h>
 
 /**
diff --git a/examples/mobc/src/src_user/component_driver/com/gs.c b/examples/mobc/src/src_user/component_driver/com/gs.c
index f5bac2c06..cd2f600b7 100644
--- a/examples/mobc/src/src_user/component_driver/com/gs.c
+++ b/examples/mobc/src/src_user/component_driver/com/gs.c
@@ -10,7 +10,7 @@
 #include <stdint.h>
 
 #include "../../hal/ccsds_user.h"
-#include "../../tlm_cmd/ccsds/tc_transfer_frame.h"
+#include <src_core/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.h>
 #include <src_core/component_driver/driver_super.h>
 #include <src_core/tlm_cmd/packet_handler.h>
 #include <src_core/tlm_cmd/ccsds/space_packet_protocol/space_packet_typedef.h>
diff --git a/examples/mobc/src/src_user/component_driver/com/gs.h b/examples/mobc/src/src_user/component_driver/com/gs.h
index b35a0e2b1..c19d92565 100644
--- a/examples/mobc/src/src_user/component_driver/com/gs.h
+++ b/examples/mobc/src/src_user/component_driver/com/gs.h
@@ -10,7 +10,7 @@
 #include <src_core/hal/uart.h>
 #include <src_core/hal/ccsds.h>
 #include "../../hal/ccsds_user.h"
-#include "../../tlm_cmd/ccsds/aos_transfer_frame.h"
+#include <src_core/tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.h>
 #include "gs_validate.h"
 
 #define GS_RX_HEADER_NUM (3)
diff --git a/examples/mobc/src/src_user/component_driver/com/gs_validate.c b/examples/mobc/src/src_user/component_driver/com/gs_validate.c
index 8a3e4201a..b14d4e804 100644
--- a/examples/mobc/src/src_user/component_driver/com/gs_validate.c
+++ b/examples/mobc/src/src_user/component_driver/com/gs_validate.c
@@ -5,7 +5,7 @@
  */
 
 #include "gs_validate.h"
-#include "../../tlm_cmd/ccsds/tc_segment.h"
+#include <src_core/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.h>
 #include <src_core/tlm_cmd/ccsds/space_packet_protocol/space_packet_typedef.h>
 
 #define GS_RECEIVE_WINDOW (256)
diff --git a/examples/mobc/src/src_user/component_driver/com/gs_validate.h b/examples/mobc/src/src_user/component_driver/com/gs_validate.h
index d397bcfb6..2a664fff8 100644
--- a/examples/mobc/src/src_user/component_driver/com/gs_validate.h
+++ b/examples/mobc/src/src_user/component_driver/com/gs_validate.h
@@ -14,7 +14,7 @@
 
 #include <stdint.h>
 
-#include "../../tlm_cmd/ccsds/tc_transfer_frame.h"
+#include <src_core/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.h>
 
 /**
  * @enum GS_VALIDATE_ERR
diff --git a/examples/mobc/src/src_user/tlm_cmd/CMakeLists.txt b/examples/mobc/src/src_user/tlm_cmd/CMakeLists.txt
index 0fbae1a07..cc0d7962a 100644
--- a/examples/mobc/src/src_user/tlm_cmd/CMakeLists.txt
+++ b/examples/mobc/src/src_user/tlm_cmd/CMakeLists.txt
@@ -14,11 +14,6 @@ set(C2A_SRCS
   normal_block_command_definition/nbc_start_hk_tlm.c
   normal_block_command_definition/nbc_respond_eh_for_test.c
   normal_block_command_definition/nbc_test_bcl.c
-  ccsds/aos_transfer_frame.c
-  ccsds/multiplexing_protocol_data_unit.c
-  ccsds/tc_transfer_frame.c
-  ccsds/tcp_to_m_pdu.c
-  ccsds/tc_segment.c
 )
 
 if(C2A_BUILD_AS_CXX)
diff --git a/examples/subobc/check_coding_rule.json b/examples/subobc/check_coding_rule.json
index 5c9e1e795..5f191bb54 100644
--- a/examples/subobc/check_coding_rule.json
+++ b/examples/subobc/check_coding_rule.json
@@ -31,7 +31,12 @@
     "CommonCmdPacket",
     "SpacePacket",
     "TlmSpacePacket",
-    "CmdSpacePacket"
+    "CmdSpacePacket",
+    "AosTransferFrame",
+    "MultiplexingProtocolDataUnit",
+    "TcpToMPdu",
+    "TcSegment",
+    "TcTransferFrame"
   ],
   "comment_additional_type" : [
     "FIXME: TCP はもう存在しないはずなので，どこかで消す",
diff --git a/tlm_cmd/ccsds/aos_space_data_link_protocol/CMakeLists.txt b/tlm_cmd/ccsds/aos_space_data_link_protocol/CMakeLists.txt
new file mode 100644
index 000000000..a9b512b74
--- /dev/null
+++ b/tlm_cmd/ccsds/aos_space_data_link_protocol/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.13)
+
+project(C2A_CORE_CCSDS_AOS_SPACE_DATA_LINK_PROTOCOL)
+
+set(C2A_SRCS
+  aos_transfer_frame.c
+  multiplexing_protocol_data_unit.c
+  tcp_to_m_pdu.c
+)
+
+if(C2A_BUILD_AS_CXX)
+  set_source_files_properties(${C2A_SRCS} PROPERTIES LANGUAGE CXX)  # C++
+endif()
+
+add_library(${PROJECT_NAME} OBJECT ${C2A_SRCS})
+
+include(${C2A_CORE_DIR}/common.cmake)
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/aos_transfer_frame.c b/tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.c
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/aos_transfer_frame.c
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.c
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/aos_transfer_frame.h b/tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.h
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/aos_transfer_frame.h
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/aos_transfer_frame.h
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/multiplexing_protocol_data_unit.c b/tlm_cmd/ccsds/aos_space_data_link_protocol/multiplexing_protocol_data_unit.c
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/multiplexing_protocol_data_unit.c
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/multiplexing_protocol_data_unit.c
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/multiplexing_protocol_data_unit.h b/tlm_cmd/ccsds/aos_space_data_link_protocol/multiplexing_protocol_data_unit.h
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/multiplexing_protocol_data_unit.h
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/multiplexing_protocol_data_unit.h
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.c b/tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.c
similarity index 98%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.c
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.c
index 92ce180e8..83e7e79e7 100644
--- a/examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.c
+++ b/tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.c
@@ -7,7 +7,7 @@
 
 #include "tcp_to_m_pdu.h"
 // FIXME: CTP ではなく TSP を使ってしまっている．できれば抽象化するべき
-#include <src_core/tlm_cmd/ccsds/space_packet_protocol/tlm_space_packet.h>
+#include "../space_packet_protocol/tlm_space_packet.h"
 
 void T2M_initialize(TcpToMPdu* tcp_to_m_pdu)
 {
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.h b/tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.h
similarity index 93%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.h
rename to tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.h
index c0da712de..fc568710d 100644
--- a/examples/mobc/src/src_user/tlm_cmd/ccsds/tcp_to_m_pdu.h
+++ b/tlm_cmd/ccsds/aos_space_data_link_protocol/tcp_to_m_pdu.h
@@ -10,9 +10,9 @@
 
 #include <stddef.h> // for size_t
 
-#include <src_core/tlm_cmd/packet_list.h>
 #include "multiplexing_protocol_data_unit.h"
-#include <src_core/system/time_manager/time_manager.h>
+#include "../../packet_list.h"
+#include "../../../system/time_manager/time_manager.h"
 
 /**
  * @enum  T2M_ACK
diff --git a/tlm_cmd/ccsds/tc_space_data_link_protocol/CMakeLists.txt b/tlm_cmd/ccsds/tc_space_data_link_protocol/CMakeLists.txt
new file mode 100644
index 000000000..cb6894dcb
--- /dev/null
+++ b/tlm_cmd/ccsds/tc_space_data_link_protocol/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.13)
+
+project(C2A_CORE_CCSDS_TC_SPACE_DATA_LINK_PROTOCOL)
+
+set(C2A_SRCS
+  tc_segment.c
+  tc_transfer_frame.c
+)
+
+if(C2A_BUILD_AS_CXX)
+  set_source_files_properties(${C2A_SRCS} PROPERTIES LANGUAGE CXX)  # C++
+endif()
+
+add_library(${PROJECT_NAME} OBJECT ${C2A_SRCS})
+
+include(${C2A_CORE_DIR}/common.cmake)
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_segment.c b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.c
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tc_segment.c
rename to tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.c
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_segment.h b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.h
similarity index 97%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tc_segment.h
rename to tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.h
index f1861e889..7c57fa6f8 100644
--- a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_segment.h
+++ b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_segment.h
@@ -20,7 +20,7 @@
 #define TC_SEGMENT_H_
 
 #include <stdint.h>
-#include <src_core/tlm_cmd/ccsds/space_packet_protocol/cmd_space_packet.h>
+#include "../space_packet_protocol/cmd_space_packet.h"
 #include <src_user/settings/tlm_cmd/ccsds/space_packet_typedef_params.h>
 
 #define TCS_HEADER_SIZE (1)
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_transfer_frame.c b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.c
similarity index 98%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tc_transfer_frame.c
rename to tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.c
index 4c90be69b..a4646933c 100644
--- a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_transfer_frame.c
+++ b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.c
@@ -6,7 +6,7 @@
 #include "tc_transfer_frame.h"
 
 #include <string.h>
-#include <src_core/library/crc.h>
+#include "../../../library/crc.h"
 
 TCTF_VER TCTF_get_ver(const TcTransferFrame* tctf)
 {
diff --git a/examples/mobc/src/src_user/tlm_cmd/ccsds/tc_transfer_frame.h b/tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.h
similarity index 100%
rename from examples/mobc/src/src_user/tlm_cmd/ccsds/tc_transfer_frame.h
rename to tlm_cmd/ccsds/tc_space_data_link_protocol/tc_transfer_frame.h