abhishreshthaa
Abhijeet S
SOME DEFINITIONS:
Some definitions should be useful for upcoming information.
• Assured Mode. Mode of delivery that guarantees that a PDU will be delivered to the peer. A PDU sent in assured mode is retransmitted by the LAC Sublayer, up to a maximum number of retransmissions, until the LAC entity at the sender receives an acknowledgement for the PDU. See also Confirmation of Delivery
• Authentication: A procedure used to validate mobile stations or subscriber’s identity.
• Base Station. A fixed station used for communicating with mobile stations. Depending upon the context, the term base station may refer to a cell, a sector within a cell, an MSC, or other part of the cellular system. See also MSC
• Common Location Register (CLR): A proprietary node that contains the MDN and MIN ranges and the corresponding HLR addresses.
• ESN: The unique serial number of a cellular phone that identifies it to the cellular system for the purpose of placing and receiving calls.
• Home Location Register (HLR): The HLR is the location register to which a user identity is assigned for record purposes such as subscriber information (e.g. ESN, MDN, Profile Information, Current Location, and Authorization Period).
• IS-41: The network standard that allows all switches to exchange information about subscribers.
• Layer 1 (L1). Layer 1 (Physical Layer) provides for the transmission and reception of radio signals between the base station and the mobile station
• Layer 2 (L2). Layer 2 provides for delivery of signaling messages generated by Layer 3 (see below). Layer 2 consists of two sub layers: the LAC Sublayer and the MAC Sublayer (see below). Layer 2 makes use of the services provided by Layer 1
• Layer 3 (L3). Layer 3 originates and terminates signaling messages according to the semantics and timing of the communication protocol between the base station and the mobile station. Layer 3 makes use of the services provided by Layer 2
• Logical channel. A communication path between stations, described in terms of the intended use of, and access to, the transferred data, and direction of transfer. A logical channel can be “mapped” to and from one or more physical channels
• Lower Layers. In this document, layers below the LAC Sublayer (e.g., Layer 1 and the MAC Sub layer)
• MAC Sub layer. See Medium Access Control Sublayer
• Mapping. In this context, the technique for forming associations between logical and physical channels
• Message. Signaling data unit transferred between the base station and the mobile station. In this document, it should be interpreted as the Layer 3 PDU or the LAC SDU
• Medium Access Control (MAC) Sublayer. The MAC Sublayer is the lower sub layer of Layer 2. It implements the medium access protocol and is responsible for transport of LAC protocol data units using the services provided by Layer 1
• Message Control and Status Block (MCSB). In this document, a parameter block representing the interface control information transferred between Layer 3 and the LAC Sublayer. The MCSB is also used to carry relevant information within the LAC Sublayer.
• MDN (Mobile Directory Number): It is a 10 digit unique number, which identify a mobile subscriber
• MIN: It is a unique 10-digit decimal number programmed into the MS. This MIN is transmitted over the air interface during registration to inform the network of the identity of the mobile station accessing the network. It is also used as a key field to access the subscriber profile record stored in the HLR
• Mobile Switching Center (MSC): A configuration of equipment that provides cellular or PCS service
• MS (Mobile Station): The Mobile Station (MS) is the equipment that subscribers use to originate and receive information and calls via the wireless network. The MS provides the user with access to the radio network and performs other functions for the user
• Visitor location registers (VLR). The VLR database contains temporary information about subscribers that is needed by the mobile services switching center (MSC) in order to service visiting subscribers. When a mobile station roams into a new mobile services switching center (MSC) area, the visitor location register (VLR) connected to that MSC will request data about the mobile station from the HLR, reducing the need for interrogation of the home location register (HLR).
Some definitions should be useful for upcoming information.
• Assured Mode. Mode of delivery that guarantees that a PDU will be delivered to the peer. A PDU sent in assured mode is retransmitted by the LAC Sublayer, up to a maximum number of retransmissions, until the LAC entity at the sender receives an acknowledgement for the PDU. See also Confirmation of Delivery
• Authentication: A procedure used to validate mobile stations or subscriber’s identity.
• Base Station. A fixed station used for communicating with mobile stations. Depending upon the context, the term base station may refer to a cell, a sector within a cell, an MSC, or other part of the cellular system. See also MSC
• Common Location Register (CLR): A proprietary node that contains the MDN and MIN ranges and the corresponding HLR addresses.
• ESN: The unique serial number of a cellular phone that identifies it to the cellular system for the purpose of placing and receiving calls.
• Home Location Register (HLR): The HLR is the location register to which a user identity is assigned for record purposes such as subscriber information (e.g. ESN, MDN, Profile Information, Current Location, and Authorization Period).
• IS-41: The network standard that allows all switches to exchange information about subscribers.
• Layer 1 (L1). Layer 1 (Physical Layer) provides for the transmission and reception of radio signals between the base station and the mobile station
• Layer 2 (L2). Layer 2 provides for delivery of signaling messages generated by Layer 3 (see below). Layer 2 consists of two sub layers: the LAC Sublayer and the MAC Sublayer (see below). Layer 2 makes use of the services provided by Layer 1
• Layer 3 (L3). Layer 3 originates and terminates signaling messages according to the semantics and timing of the communication protocol between the base station and the mobile station. Layer 3 makes use of the services provided by Layer 2
• Logical channel. A communication path between stations, described in terms of the intended use of, and access to, the transferred data, and direction of transfer. A logical channel can be “mapped” to and from one or more physical channels
• Lower Layers. In this document, layers below the LAC Sublayer (e.g., Layer 1 and the MAC Sub layer)
• MAC Sub layer. See Medium Access Control Sublayer
• Mapping. In this context, the technique for forming associations between logical and physical channels
• Message. Signaling data unit transferred between the base station and the mobile station. In this document, it should be interpreted as the Layer 3 PDU or the LAC SDU
• Medium Access Control (MAC) Sublayer. The MAC Sublayer is the lower sub layer of Layer 2. It implements the medium access protocol and is responsible for transport of LAC protocol data units using the services provided by Layer 1
• Message Control and Status Block (MCSB). In this document, a parameter block representing the interface control information transferred between Layer 3 and the LAC Sublayer. The MCSB is also used to carry relevant information within the LAC Sublayer.
• MDN (Mobile Directory Number): It is a 10 digit unique number, which identify a mobile subscriber
• MIN: It is a unique 10-digit decimal number programmed into the MS. This MIN is transmitted over the air interface during registration to inform the network of the identity of the mobile station accessing the network. It is also used as a key field to access the subscriber profile record stored in the HLR
• Mobile Switching Center (MSC): A configuration of equipment that provides cellular or PCS service
• MS (Mobile Station): The Mobile Station (MS) is the equipment that subscribers use to originate and receive information and calls via the wireless network. The MS provides the user with access to the radio network and performs other functions for the user
• Visitor location registers (VLR). The VLR database contains temporary information about subscribers that is needed by the mobile services switching center (MSC) in order to service visiting subscribers. When a mobile station roams into a new mobile services switching center (MSC) area, the visitor location register (VLR) connected to that MSC will request data about the mobile station from the HLR, reducing the need for interrogation of the home location register (HLR).