Wireless Icon glossary U-APSD Unscheduled Automatic Power Save Delivery Unscheduled Automatic Power Save Delivery
Wireless Icon glossary U-NII Unlicensed National Information Infrastructure radio frequency band, in the 5.1-GHz through 5.8-GHz ranges. Unlicensed National Information Infrastructure radio frequency band, in the 5.1-GHz through 5.8-GHz ranges.
LTE Icon glossary U-plane User plane is the protocol stack carrying user data, as opposed to control signaling which is carried by the control plane. User plane is the protocol stack carrying user data, as opposed to control signaling which is carried by the control plane.
LTE Icon glossary U-RNTI UTRAN Radio Network Temporary Identifier is an unique User Equipment identifier that contains two parts, an SRNC identifier and a C-RNTI. UTRAN Radio Network Temporary Identifier is an unique User Equipment identifier that contains two parts, an SRNC identifier and a C-RNTI.
LTE Icon glossary UDP User Datagram Protocol is one of the core members of the Internet protocol suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages,… User Datagram Protocol is one of the core members of the Internet protocol suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without prior communications to set up special transmission channels or data paths. Show more
Wireless Icon glossary UDP (User Datagram Protocol) User Datagram Protocol. A set of Network, Transport, and Session Layer protocols that RFC 768 defines. These protocols include checksum and address information but does not retransmit data or process… User Datagram Protocol. A set of Network, Transport, and Session Layer protocols that RFC 768 defines. These protocols include checksum and address information but does not retransmit data or process any errors. Show more
LTE Icon glossary UE User Equipment is a device used by end users to communicate. User Equipment is a device used by end users to communicate.
LTE Icon glossary UICC Universal Integrated Circuit Card is the smart card used in mobile terminals in GSM and UMTS networks. The UICC ensures the integrity and security of all kinds of personal data,… Universal Integrated Circuit Card is the smart card used in mobile terminals in GSM and UMTS networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes. With the advent of more services, the storage space will need to be larger. Show more
LTE Icon glossary UM Unacknowledged Mode is one of three Radio Link Control modes (the other two being Acknowledged Mode (AM) and Transparent Mode (TM)). It provides a unidirectional data transfer service and is… Unacknowledged Mode is one of three Radio Link Control modes (the other two being Acknowledged Mode (AM) and Transparent Mode (TM)). It provides a unidirectional data transfer service and is used when retransmission is not necessary. Show more
LTE Icon glossary UMD Unacknowledged Mode Datais the type of Protocol Data Unit used to carry user-plane data in Radio Link Control Unacknowledged Mode. Unacknowledged Mode Datais the type of Protocol Data Unit used to carry user-plane data in Radio Link Control Unacknowledged Mode.
LTE Icon glossary UMTS Universal Mobile Telecommunications System is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is… Universal Mobile Telecommunications System is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses Wideband Code Division Multiple Access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators. Show more
Wireless Icon glossary unicast An Ethernet LAN address that identifies the MAC address of an individual LAN or NIC card. An Ethernet LAN address that identifies the MAC address of an individual LAN or NIC card.
Wireless Icon glossary unique/site-local address An IPv6 address type that can expand to the size of an organ¬ization and that is used to describe the boundary of the organizational network. This is the private addressing… An IPv6 address type that can expand to the size of an organ¬ization and that is used to describe the boundary of the organizational network. This is the private addressing for IPv6. Show more
LTE Icon glossary UP Unitary Precoding is a beamforming method to support multi-layer transmission in MIMO radio systems, where the beam-forming matrix is unitary. Unitary Precoding is a beamforming method to support multi-layer transmission in MIMO radio systems, where the beam-forming matrix is unitary.
LTE Icon glossary Uplink The Uplink is a unidirectional radio link for the transmission of signals from an user equipment to a base station, from a mobile station to a mobile base station or… The Uplink is a unidirectional radio link for the transmission of signals from an user equipment to a base station, from a mobile station to a mobile base station or from a mobile base station to a base station. Show more
Wireless Icon glossary Upstream Upstream means a data stream from the end users to the central part of the network. See also downstream. Upstream means a data stream from the end users to the central part of the network. See also downstream.
LTE Icon glossary URRP-MME UE Reachability Request Parameter for the Mobility Management Entity is a temporary parameter stored in the HSS and MME, indicating that the HSS has requested the MME to provide notification… UE Reachability Request Parameter for the Mobility Management Entity is a temporary parameter stored in the HSS and MME, indicating that the HSS has requested the MME to provide notification of UE activity. Show more
Wireless Icon glossary user EXEC An initial command mode with limited commands to test connectivity and verify statistics. An initial command mode with limited commands to test connectivity and verify statistics.
LTE Icon glossary User Profile User Profile is the set of information to provide an user with a personalized service environment. User Profile is the set of information to provide an user with a personalized service environment.
LTE Icon glossary USIM Universal Subscriber Identity Module is an application on the UICC used for accessing services provided by mobile networks. The USIM brought among other things security improvements like the mutual authentication… Universal Subscriber Identity Module is an application on the UICC used for accessing services provided by mobile networks. The USIM brought among other things security improvements like the mutual authentication and longer encryption keys and an improved address book. Show more
Wireless Icon glossary UTP (Unshielded Twisted-Pair) cable A branch of twisted-pair cabling that uses four pairs of colored wire. UTP is vulnerable to EMI and uses an RJ-45 connector. There are five categories of UTP cable, labeled… A branch of twisted-pair cabling that uses four pairs of colored wire. UTP is vulnerable to EMI and uses an RJ-45 connector. There are five categories of UTP cable, labeled Category 1 to Category 5. Show more
LTE Icon glossary UTRA-NTDD Time Division Duplex UTRA is 1.28 Mcps option access mode. Time Division Duplex UTRA is 1.28 Mcps option access mode.
LTE Icon glossary UTRA-TDD Time Division Duplex UTRA Radio access mode that includes UTRA-NTDD and UTRA-WTDD. Time Division Duplex UTRA Radio access mode that includes UTRA-NTDD and UTRA-WTDD.
LTE Icon glossary UTRA-WTDD Time Division Duplex UTRA is 3.84 Mcps option access mode. Time Division Duplex UTRA is 3.84 Mcps option access mode.
LTE Icon glossary UTRAN Universal Terrestrial Radio Access Network is a collective term for the Node B’s and Radio Network Controllers (RNCs) which make up the UMTS radio access network. This communications network, commonly… Universal Terrestrial Radio Access Network is a collective term for the Node B’s and Radio Network Controllers (RNCs) which make up the UMTS radio access network. This communications network, commonly referred to as 3G (for 3rd Generation Wireless Mobile Communication Technology), can carry many traffic types from real-time Circuit Switched to IP based Packet Switched. The UTRAN allows connectivity between the UE (user equipment) and the core network. Show more
LTE Icon glossary UUP User-User Protocol is adopted between two or more users in order to establish communication between them. User-User Protocol is adopted between two or more users in order to establish communication between them.
