XB Communications Express B040100 | | Fundamental Theories for Communications |
| B040101 | | Information Theory |
| B040102 | | Coding Theory |
| B040103 | | Error-Control System |
| B040104 | | Cryptography Theory |
| B040105 | | Information Security |
| B040106 | | Network Security |
| B040107 | | Teletraffic Theory |
| B040108 | | Queueing Theory |
| B040109 | | Network Theory |
| B040110 | | Quantum Information Theory |
| B040111 | | Digital Signal Processing |
| B040112 | | Network Coding |
| B040113 | | Game Theory |
B040200 | | Energy in Electronics Communications |
| B040201 | | Energy Conservation Techniques |
| B040202 | | Clean Energy |
| B040203 | | Power Supply Systems |
| B040204 | | Monitoring and Management for Power Supply Systems |
| B040205 | | Power Supply Circuits and Power Control |
| B040206 | | DC-DC Converters |
| B040207 | | AC-DC Converters, Rectifiers |
| B040208 | | Inverter, UPS |
| B040209 | | Contactless Power Supply |
| B040210 | | Battery |
| B040211 | | Fuel Cells |
| B040212 | | Power Factor Correction |
| B040213 | | EMC, Electromagnetic Noise |
| B040214 | | Circuit Component and Material |
B040300 | | Transmission Systems and Transmission Equipment for Communications |
| B040301 | | Line Code |
| B040302 | | Modulation/Demodulation Scheme |
| B040303 | | Multiplexing Scheme |
| B040304 | | Synchronization Scheme |
| B040305 | | Transmission Equipment and Circuit |
| B040306 | | Telecommunication Cable and Wiring System |
| B040307 | | Metallic Access Systems |
| B040308 | | Line Monitoring and Control |
B040400 | | Optical Fiber for Communications |
| B040401 | | Optical Fiber Design/Manufacturing/Performance Evaluation |
| B040402 | | Photonic Crystal Fiber/Holey Fiber |
| B040403 | | Low Bending Loss and High-density Packaging Optical Fiber |
| B040404 | | Specialty Optical Fiber |
| B040405 | | Fiber-Optic Devices |
| B040406 | | Splicing and Connector |
| B040407 | | Optical Fiber Evaluation and Management |
B040500 | | Fiber-Optic Transmission for Communications |
| B040501 | | Optical Functional Component |
| B040502 | | Optical Amplification |
| B040503 | | Optical Line Coding |
| B040504 | | Dispersion Compensation |
| B040505 | | Optical Multiplexing |
| B040506 | | Optical Access Systems |
| B040507 | | Optical Signal Processing |
| B040508 | | Digital Signal Processing for Optical Communications |
| B040509 | | Optical Quantum Transmissions |
| B040510 | | Photonic Network Systems and Architectures |
| B040511 | | Photonic Network Control |
| B040512 | | Optical Interconnection and Optical Interface |
| B040513 | | Optical Switch Systems |
B040600 | | Network System |
| B040601 | | System Architecture |
| B040602 | | System Software |
| B040603 | | System Hardware |
| B040604 | | Call Control |
| B040605 | | Distributed Processing Platform |
| B040606 | | Switching Scheme |
| B040607 | | MPLS, GMPLS |
| B040608 | | Router |
B040700 | | Network |
| B040701 | | Network Architecture |
| B040702 | | Network Control |
| B040703 | | Communication Protocol |
| B040704 | | Mobile Communication Protocol |
| B040705 | | Communication Quality and QoS |
| B040706 | | Cross-layer Control |
| B040707 | | Network Virtualization |
| B040708 | | NFV |
| B040709 | | Communication Service |
| B040710 | | Multicast |
| B040711 | | P2P |
| B040712 | | NGN |
| B040713 | | Overlay Network |
| B040714 | | Content Delivery Network |
| B040715 | | Information Centric Networking |
| B040716 | | Ubiquitous Network |
| B040717 | | Ad Hoc Network |
| B040718 | | Sensor Network |
| B040719 | | Environmental Awareness Network |
| B040720 | | SDN |
| B040721 | | Mobile Computing |
| B040722 | | Grid Computing |
| B040723 | | Cloud Computing |
| B040724 | | Edge Computing |
| B040725 | | Data Center Network |
| B040726 | | Delay/Disruption Tolerant Networks |
B040800 | | Internet |
| B040801 | | Internet Protocol |
| B040802 | | Internet QoS |
| B040803 | | Internet Security |
| B040804 | | Internet Routing |
| B040805 | | Internet Services |
| B040806 | | IP Telephony |
| B040807 | | WWW |
| B040808 | | Internet Broadcasting |
| B040809 | | E-mail |
| B040810 | | DNS |
| B040811 | | IoT |
B040900 | | Network Management/Operation |
| B040901 | | Management/Operation Architecture |
| B040902 | | Service Management/Business Management |
| B040903 | | Distributed System Management/Operation |
| B040904 | | Management Protocol/Model/Process |
| B040905 | | Fault, Configuration, Performance, and Accounting Management |
| B040906 | | Security Control and its Tools |
| B040907 | | Security Policy |
| B040908 | | Operation Interface |
| B040909 | | Management/Configuration Automation and Automated Management |
| B040910 | | Provisioning |
| B040911 | | Traffic Engineering |
| B040912 | | Monitoring |
B041000 | | Antennas and Propagation |
| B041001 | | Radio Propagation |
| B041002 | | Indoor Propagation |
| B041003 | | Mobile Propagation |
| B041004 | | MIMO Propagation |
| B041005 | | Wireless Power Transmission |
| B041006 | | Electromagnetic Analysis |
| B041007 | | Antennas |
| B041008 | | Small Antennas |
| B041009 | | Antennas for Mobile Communication |
| B041010 | | Antennas for Body Area Communication |
| B041011 | | Planar Antennas |
| B041012 | | Wideband/Multiband Antennas |
| B041013 | | Metamaterial/EBG Antennas |
| B041014 | | Aperture Antennas |
| B041015 | | Array Antennas |
| B041016 | | Integration and Connecting Technology for Antennas |
| B041017 | | Antenna System |
| B041018 | | Adaptive Array Antennas/MIMO |
| B041019 | | DOA (Direction-of-Arrival) Estimation |
| B041020 | | Antenna Measurements |
B041100 | | Electromagnetic Compatibility (EMC) |
| B041101 | | Interfering Electromagnetic Wave and Electromagnetic Wave Interference |
| B041102 | | Electromagnetic Noise and its Propagation Mechanism |
| B041103 | | EMC on System |
| B041104 | | ESD, Discharge, and Immunity |
| B041105 | | EMC Modeling |
| B041106 | | EMC Countermeasure |
| B041107 | | Parts and Material for EMC Design |
| B041108 | | Absorption and Shielding of Radio Waves |
| B041109 | | Measurement on EMC |
| B041110 | | Biological Effect of Electromagnetic Field and its Measurement |
| B041111 | | Application of Electromagnetic Wave |
| B041112 | | Electromagnetic Monitoring |
| B041113 | | Electromagnetic Information Security |
B041200 | | Wireless Communication Technologies |
| B041201 | | Wireless Modulation/Demodulation |
| B041202 | | Spread Spectrum Communication, UWB |
| B041203 | | Multiple Access Scheme |
| B041204 | | Wireless Access Protocol |
| B041205 | | Multi-Carrier Transmission, OFDM |
| B041206 | | Diversity |
| B041207 | | Multipath Fading Immunity |
| B041208 | | Adaptive Equalization, Interference Cancellation |
| B041209 | | Wireless Signal Processing |
| B041210 | | Radio Resource Allocation and Scheduling |
| B041211 | | Software Defined Radio |
| B041212 | | MIMO, Space-Time Signal Processing |
| B041213 | | Adaptive and Smart Antennas |
| B041214 | | Radio on Fiber/Radio over Fiber |
| B041215 | | Spectrum-efficient Technologies |
| B041216 | | Power-efficient Technologies |
| B041217 | | Optical Wireless Communication |
| B041218 | | Visible Light Communications |
| B041219 | | Wireless Circuit Control |
| B041220 | | Channel Estimation |
| B041221 | | Synchronization |
| B041222 | | Relay and Cooperative Communication |
| B041223 | | Space-Time Coding |
| B041224 | | Physical Layer Security |
| B041225 | | Power Line Communications |
B041300 | | Terrestrial Wireless Communication/Broadcasting Technologies |
| B041301 | | Mobile Communications |
| B041302 | | Fixed Radio Communications |
| B041303 | | Wireless LAN |
| B041304 | | Wireless Access System |
| B041305 | | Ad Hoc Communication |
| B041306 | | Wireless Ubiquitous Network |
| B041307 | | ITS (Intelligent Transport System) |
| B041308 | | Multi-hop/Multi-cell Wireless Network |
| B041309 | | Cognitive Radio Communication |
| B041310 | | Broadcasting Systems |
B041400 | | Satellite Communications |
| B041401 | | Satellite Broadcasting |
| B041402 | | Satellite-Ground Integrated Communications System |
| B041403 | | Satellite Sensor Network |
| B041404 | | Satellite Application System |
| B041405 | | Satellite Control and Management Technologies |
| B041406 | | Satellite Communication Technologies |
| B041407 | | Satellite/Earth Station Hardware |
B041500 | | Sensing |
| B041501 | | Electronic/Radio/Optical Measurement |
| B041502 | | Remote Sensing |
| B041503 | | Fiber-Optic Sensing |
| B041504 | | Radar and Signal Processing |
| B041505 | | SAR, ISAR |
| B041506 | | Pulse Compression |
| B041507 | | Polarimetry |
| B041508 | | Positioning and Ranging |
| B041509 | | Moving Target Detection |
| B041510 | | Subsurface Sensing |
| B041511 | | Space Exploration |
| B041512 | | Target Tracking/Estimation |
| B041513 | | UWB Sensor |
| B041514 | | Measurement and Exploration System |
| B041515 | | Frequency Standard |
B041600 | | Navigation, Guidance and Control Systems |
| B041601 | | Electronic Navigation |
| B041602 | | Satellite Navigation |
| B041603 | | Fling Object Inducement |
| B041604 | | State Estimation |
| B041605 | | Movement Model |
| B041606 | | Automatic Control |
| B041607 | | On-Board Device |
| B041608 | | Tracking Filter |
| B041609 | | Transportation Control and Management |
B041700 | | Space Utilization Systems for Communications |
| B041701 | | Spacecraft |
| B041702 | | Sensing/Positioning/Explore Satellite |
| B041703 | | Small Satellite System |
| B041704 | | Communication/Quasi-zenith Satellite System |
| B041705 | | Energy Transmission System |
| B041706 | | Meteor Burst Communication System |
| B041707 | | Inter-Satellite Communication and Satellite Network |
B041800 | | Multimedia Systems for Communications |
| B041801 | | Image Processing/Image Coding |
| B041802 | | Voice Processing/Voice Coding |
| B041803 | | Media Synchronization |
| B041804 | | Communication Quality |
| B041805 | | Authentication/Authorization/Access Control |
| B041806 | | Service Integration |
| B041807 | | Web Service |
| B041808 | | SOA, SaaS, PaaS |
| B041809 | | Mobile Multimedia |
| B041810 | | Home Network, Home Information Appliances |
| B041811 | | On-Demand System |
| B041812 | | Network Community |
| B041813 | | SNS |