HaLowThis is the common term of the IEEE 802.11ah amendment to the Wi-Fi standards (IEEE 802.11-2012) that supports sub 1GHz radio frequencies to provide e... View more
Hamming CodeHamming codes, invented by R Hamming of Bell Labs, are used to generate FEC (Forward Error Correction) data. The codes are compiled using a matrix, in... View more
Handoff / HandoverA Handoff, or Handover, is the process in which a cellular phone is handed from one cell to the next in order to maintain a radio connection with the ... View more
Handover WordThe Handover Word is a GPS (Global Positioning System) variable used to enable a GPS receiver to switch from the course acquisition code to the precis... View more
HAR - Home Agent MIP RequestThe HAR is a MIP Diameter Application message, passed from the Home Diameter Server to the Home Agent. It is used in the MIP registration process and ... View more
Hard HandoverA handoff, or handover, is the process in which a cellular phone is handed from one cell to the next in order to maintain a radio connection with the ... View more
HARQ - Hybrid Automatic Repeat RequestHARQ is an optimized ARQ mechanism designed to provide error correction and packet retransmission across a wireless interface. ... View more
HARQ InformationThis includes the HARQ protocol related information for the corresponding HS-DSCH transmission, as well as information about the redundancy version. T... View more
HashingHashing is a cryptographic term for a mathematical value used to summaries a much larger block of data. This summary is termed the digest. The digest ... View more
Hayes AT CommandsThe Hayes AT (ATtention) commands are a standard set of instructions for controlling a modem. They were developed in the mid 1980's by Hayes Micro Com... View more
HCCA - Controlled Channel AccessThe term HCCA is used in wireless networks supporting the IEEE 802.11e Quality of Service enhancement. It is a component of the HCF and provides suppo... View more
HCF - Hybrid Coordination FunctionThe 802.11e Quality of Service facility defines a new coordination function termed HCF which is only used in QBSS but implemented in all QSTA. The HCF... View more
HCI - Host Controller InterfaceThe Host Controller Interface enables communication between the Bluetooth Host and the Bluetooth Device. If the Bluetooth host and device was fully in... View more
HCP - Host Controller ProtocolDefined by ETSI , the HCP supports communication between a contactless application residing on a SIM and an NFC enabled mobile phone. As such, the pro... View more
HCS - Hierarchical Cell StructureThis is a term typically used in GSM to describe the priority of cells within a mixed environment. That is when Macro, Micro, and Pico cells may be vi... View more
HDLC - High Level Data Link ControlHDLC is a Layer 2 protocol for point to point and multipoint delivery of data. The frame consists of flags to delimit the frame, along with addressing... View more
HDML - Handheld Device Markup LanguageHandheld Device Markup Language is a modified form of HTML (Hypertext Markup Language), and is deigned for use of wireless devices, or small computers... View more
HDSL - High-bit-rate Digital Subscriber LineHigh-bit-rate Digital Subscriber Line is the most mature of the xDSL family of protocols. It allows E1 / T1 rates to be achieved over two pair copper ... View more
HDTP - Hand held Device Transport ProtocolHDTP is optimized for the carriage of HDML (Handheld Device Markup Language) coded data. It is transported at Layer 4 and presents the HDML to the HDM... View more
HE-VASP - Home Environment Value Added Service ProviderThis is a VASP (Value Added Service Provider) that has an agreement with the Home Environment to provide services. ... View more