精华全集 冲广角币 获取广角币的更多方法
【名称】：PN-3421 (TIA/EIA/IS-95-A)
【作者】：
【格式】：PDF
【页数】：323
【语言】：英文
【摘要或目录】：
1 GENERAL
1.1 Terms and Numeric Information
1.1.1 Terms
Abbreviated Alert. An abbreviated alert is used to remind the mobile station user that previously selected alternative routing features are still active.
AC. See Authentication Center.
Access Attempt. A sequence of one or more access probe sequences on the Access Channel containing the same message. See also Access Probe and Access Probe Sequence.
Access Channel. A Reverse CDMA Channel used by mobile stations for communicating to the base station. The Access Channel is used for short signaling message exchanges such as call originations, responses to pages, and registrations. The Access Channel is a slotted random access channel.
Access Channel Message. The information part of an access probe consisting of the message body, length field, and CRC.
Access Channel Message Capsule. An Access Channel message plus the padding.
Access Channel Preamble. The preamble of an access probe consisting of a sequence of all-zero frames that is sent at the 4800 bps rate.
Access Channel Request Message. An Access Channel message that is autonomously generated by the mobile station. See also Access Channel Response Message.
Access Channel Response Message. A message on the Access Channel generated to reply to a message received from the base station.
Access Channel Slot. The assigned time interval for an access probe. An Access Channel slot consists of an integer number of frames. The transmission of an access probe is performed within the boundaries of an Access Channel slot.
Access Overload Class. See Overload Class.
Access Probe. One Access Channel transmission consisting of a preamble and a message. The transmission is an integer number of frames in length and transmits one Access Channel message. See also Access Probe Sequence and Access Attempt.
Access Probe Sequence. A sequence of one or more access probes on the Access Channel. The same Access Channel message is transmitted in every access probe of an access attempt. See also Access Probe and Access Attempt.
Acknowledgement. A Layer 2 response by the mobile station or the base station confirming that a signaling message was received correctly.
Action Time. The time at which the action implied by a message should take effect.
Active Set. The set of pilots associated with the CDMA Channels containing Forward Traffic Channels assigned to a particular mobile station.
Aging. A mechanism through which the mobile station maintains in its Neighbor Set the pilots that have been recently sent to it from the base station and the pilots whose handoff drop timers have recently expired.
A-key. A secret, 64-bit pattern stored in the mobile station and HLR/AC. It is used to generate/update the mobile station誷 Shared Secret Data. The A-key is used in the mobile station authentication process.
Analog Access Channel. An analog control channel used by a mobile station to access a system to obtain service.
Analog Color Code. An analog signal (see Supervisory Audio Tone) transmitted by a base station on an analog voice channel and used to detect capture of a mobile station by an interfering base station or the capture of a base station by an interfering mobile station.
Analog Control Channel. An analog channel used for the transmission of digital control information from a base station to a mobile station or from a mobile station to a base station.
Analog Paging Channel. A forward analog control channel that is used to page mobile stations and send orders.
Analog Voice Channel. An analog channel on which a voice conversation occurs and on which brief digital messages may be sent from a base station to a mobile station or from a mobile station to a base station.
Authentication. A procedure used by a base station to validate a mobile station誷 identity.
Authentication Center (AC). An entity that manages the authentication information related to the mobile station.
Authentication Response (AUTHR). An 18-bit output of the authentication algorithm. It is used, for example, to validate mobile station registrations, originations and terminations.
Autonomous Registration. A method of registration in which the mobile station registers without an explicit command from the base station.
AWGN. Additive White Gaussian Noise.
Bad Frames. Frames classified as erasures (frame category 10) or 9600 bps frames, primary traffic only with bit errors (frame category 9). See also Good Frames.
Base Station. A station in the Domestic Public Cellular Radio Telecommunications Service, other than a mobile 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.
Base Station Authentication Response (AUTHBS). An 18-bit pattern generated by the authentication algorithm. AUTHBS is used to confirm the validity of base station orders to update the Shared Secret Data.
Base Station Random Variable (RANDBS). A 32-bit random number generated by the mobile station for authenticating base station orders to update the Shared Secret Data.
BCH Code. See Bose-Chaudhuri-Hocquenghem Code.
Blank-and-Burst. The pre-emption of an entire Traffic Channel frame誷 primary traffic by signaling traffic or secondary traffic. Blank-and-burst is performed on a frame-by-frame basis.
Bose-Chaudhuri-Hocquenghem Code (BCH Code). A large class of error-correcting cyclic codes. For any positive integers m, m食 3, and t < 2m-1, there is a binary BCH code with a block length n equal to 2m - 1 and n - k ≤ mt parity check bits, where k is the number of information bits. The BCH code has a minimum distance of at least 2t + 1.
bps. Bits per second.
Busy-Idle Bits. The portion of the data stream transmitted by a base station on a forward analog control channel that is used to indicate the current busy-idle status of the corresponding reverse analog control channel.
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