ANSI ATIS 0700717-2000 Air Interface Standard for Broadband Direct Sequence CDMA for Fixed Wireless PSTN Access C Layer 2 (Formerly ATIS T1.717).pdf

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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-0700717.2000(R2009) Air Interface Standard for Broadband Direct Sequence CDMA for Fixed Wireless PSTN Access Layer 2 ATIS is the leading technical planning and standards development organization committed to the rapid development of global, mar

2、ket-driven standards for the information, entertainment and communications industry. More than 250 companies actively formulate standards in ATIS 20 Committees, covering issues including: IPTV, Service Oriented Networks, Home Networking, Energy Efficiency, IP-Based and Wireless Technologies, Quality

3、 of Service, Billing and Operational Support. In addition, numerous Incubators, Focus and Exploratory Groups address emerging industry priorities including “Green”, IP Downloadable Security, Next Generation Carrier Interconnect, IPv6 and Convergence. ATIS is the North American Organizational Partner

4、 for the 3rd Generation Partnership Project (3GPP), a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications Sectors, and a member of the Inter-American Telecommunication Commission (CITEL). For more information, please visit . AMERICAN NATI

5、ONAL STANDARD Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantia

6、l agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The u

7、se of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American Natio

8、nal Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards I

9、nstitute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require

10、 that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Notice of Disclaimer Encipherment and Decipherment; Framing,

11、error checking, and discrimination of MAC peer to peer messages and DLC frames; Processing of Automatic Power Control (APC) information; Symbol repetition; Sleep mode control; and Control for discontinuous transmissions. ATIS-0700717.2000 3 NWK Layer Higher LayersDLCSublayerMACSublayerPHYLayerAPCCHA

12、CCHTRCH(variablenumber)CTAPCCHCTCHAXCH SBCCHFBCCHDCCH DTCHLayer 3SignallingControlS-APCCHS-ACCHS-TRCH(variablenumber) S-CTAPCCH1S-CTCH1S-AXCH2S-SBCCH1S-FBCCH1SAXPT2LAXPT2GLPT1ASPT2Note:1 Indicates channel is downlink only2Indicates channel is uplink onlyControlUnspreadPhysicalChannelsPhysicalChannel

13、sFigure 2 - Interfaces Among Layers 1, 2 and 3 ATIS-0700717.2000 4 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All sta

14、ndards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. This standard shall be used in conjunction with the following publications: T1.716-2

15、000, Air Interface Standard for Broadband Direct Sequence CDMA for Fixed Wireless PSTN Access Layer 1.1ITU Recommendation Q.920 - Digital Subscriber Signalling System No. 1 (DSS1) ISDN User-Network Interface Data Link Layer General Aspects.2ITU Recommendation Q.931 - ISDN User-Network Interface - Da

16、ta Link Layer Specification.2 ETS 300 175-4 - Radio Equipment and Systems (RES); Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) Layer. 3 Definitions 3.1 Acquisition Code: Pseudo-noise (PN) code of length 233178 chips generated by the Linea

17、r Feedback Shift Register (LFSR). 3.2 Associated Control Channel (ACCH): The assigned channel used for the signaling that is associated with a particular connection. 3.3 APC Channel (APCCH): The assigned channel used to send Automatic Power Control commands from Wireless Access Subscriber Function (

18、WASF) to Wireless Access Network Function (WANF) and from WANF to WASF. 3.4 Automatic Power Control (APC): The feedback processes by which the WANF transmitter uses the minimum transmit power necessary to maintain a link with specified quality to a WASF and the WASF transmitter uses the minimum tran

19、smit power necessary to maintain a link with specified quality to the WANF. 3.5 Assigned Channel: A channel assigned for a specific call, as distinguished from a global channel. 3.6 Assigned Pilot (ASPT): The pilot signal transmitted by a WASF. 3.7 Access Channel (AXCH): A global channel used by the

20、 WASF for making an initial access to a WANF. 3.8 Bearer Channel: The resources allocated on the air interface and PSTN that provide the user service. 3.9 Bearer Channel Modification (BCM): The process by which the data rate of a bearer channel is changed. This is done by changing the bearer channel

21、 from 32 Kbps ADPCM to 64 Kbps PCM. 3.10 Bit Error Ratio (BER): The ratio of the number of bits received in error to the total number of bits received, also known as Bit Error Rate. 1This document is available from the Alliance for Telecommunications Industry Solutions. 2These documents are availabl

22、e from the International Telecommunications Union. ATIS-0700717.2000 5 3.11 Bandwidth: The frequency range over which a system spreads its signal, specifically, the chip rate plus the excess bandwidth. 3.12 Broadband Direct Sequence CDMA: A CDMA system utilizing bandwidth greater than or equal to 5

23、MHz. 3.13 Broadcast Channels: Global channels broadcast from the WANF that provide paging data, access and control channel availability data, service availability and blocking data to all WASFs. 3.14 CDMA channel: A channel resulting when a 128 Kbps data channel is Direct Sequence spread. 3.15 Chip:

24、 One bit in a PN Code. 3.16 Chip Rate: The selected rate at which PN sequences at the WANF and the WASF are clocked. 3.17 Control APC Channel (CTAPCCH): A channel used by a WANF to control WASF transmit power during an access request. 3.18 Control Channel: A global channel used by a WANF to grant ac

25、cess to a WASF. 3.19 Data Channel: A 128 Kbps communications path that will be spread to become a CDMA channel; equivalently, a CDMA channel is despread to become a data channel. This data rate is twice the information rate since all bearer channels are FEC coded to yield a 64 Kbps data rate. 3.20 D

26、edicated Control Channel (DCCH): A higher layer channel containing control plane information for transmission on an assigned channel. 3.21 Dedicated Traffic Channel (DTCH): A higher layer channel containing user plane information for transmission on an assigned channel. 3.22 Digital LL: Digital Leas

27、ed Line. 3.23 dBm: A measure of power expressed as a ratio in dB relative to one milliwatt. 3.24 Downlink: The radio link from the WANF to WASF. Synonymous with forward link. 3.25 Duplex Method: A method employed to provide simultaneous communication in both the uplink and downlink directions. 3.26

28、Epoch: The repetition period of the long PN codes is called an epoch. The duration of the epoch is always the same number of chips (29877120), but its length in time is a function of the chip rate. 3.27 Excess Bandwidth: The additional bandwidth that together with the chip rate defines the bandwidth

29、 of a spread spectrum signal, nominally 20% of the chip rate. 3.28 Fast Broadcast Control Channel (FBCCH): A global channel used by a WANF to broadcast to all WASFs assigned to that WANF fast-changing information concerning which services and access channels are currently available. 3.29 Forward Err

30、or Correction (FEC): The process of adding additional data to a transmission in order to allow correction of errors by a receiver. 3.30 Forward Link: See Downlink. 3.31 Frequency Division Duplex (FDD): A method of using non-overlapping frequency allocations for the uplink and downlink to achieve ful

31、l duplex operation. 3.32 Full Duplex: Bi-directional, simultaneous two-way communications. 3.33 Global Channel: A channel not assigned to a specific user or call and distinguishable from an assigned channel. Global channels consist of the broadcast channels and the Access and Control ATIS-0700717.20

32、00 6 Channels transmitted by both the WANF and WASFs. Global channels are sometimes referred to as common channels. 3.34 Global Pilot: Downlink pilot signal of length 128, transmitted by a WANF to all WASFs assigned to that WANF. 3.35 Long Access Pilot (LAXPT): Uplink long code pilot signal used dur

33、ing access requests. 3.36 Long Code: PN code of period length 29877120 chips. 3.37 Pilot Signal: A non-data modulated channel used as a reference for coherent detection and code tracking. The WANF transmits one global pilot signal to all WASFs; each WASF transmits its own set of pilot signals to the

34、 WANF. 3.38 PN Code: Pseudo-random, noise-like, periodic chip sequence code used to spread the spectrum of a Data Channel. 3.39 PN Code Seed: The initial state of the LFSR. A unique seed creates a unique set of codes. 3.40 Processing Gain: The ratio of chip rate to information rate. 3.41 Reverse Lin

35、k: See Uplink. 3.42 Short Access Pilot (SAXPT): Uplink short code pilot signal used during access requests. 3.43 Short Code: A PN code of length equal to the Spreading Factor, derived from the long code. 3.44 Slow Broadcast Channel (SBCCH): A global channel used to broadcast slow changing system inf

36、ormation and paging messages. 3.45 Spreading Factor: The ratio of chip rate to symbol rate. 3.46 Spreading Code: PN code used to spread the spectrum of a data channel. 3.47 Sub-Epoch: The repetition period of PN sequences from the 36 stage LFSR, equal to 233,415 chips. A sub-epoch is 1/128 of an epo

37、ch. 3.48 Temporary Subscriber User Identity (TSUI): A unique identity, assigned to a WASF as part of registration (performed at Layer 3), used for paging. 3.49 Traffic Channel: A data channel that carries user data at 16, 32, or 64 Kbps (depending on the service). 3.50 Traffic Processing: Traffic pr

38、ocessing for transmission consists of encipherment, FEC encoding, and symbol repetition (as necessary). Traffic processing for reception consists of symbol combining, FEC decoding, and decipherment. 3.51 TRCH /16L: A traffic channel at 16 Kbps data rate, with low BER. 3.52 TRCH /32N: A traffic chann

39、el at 32 Kbps data rate, with normal BER. 3.53 TRCH /64N: A traffic channel at 64 Kbps data rate, with normal BER. 3.54 TRCH /64L: A traffic channel at 64 Kbps data rate, with low BER. 3.55 Uplink: The radio link in the WASF to WANF direction. Synonymous with Reverse Link. ATIS-0700717.2000 7 4 Acro

40、nyms and Abbreviations ACCH Associated Control Channel ACG Assigned Channel Group ACK Acknowledgement ADPCM Adaptive Differential Pulse Code Modulation APC Automatic Power Control APCCH Automatic Power Control Channel ARI Access Rights Identity ASPT Assigned Pilot AXCH Access Channel BCM Bearer Chan

41、nel Modification BER Bit Error Ratio BW Bandwidth C/R Command/Response CDMA Code Division Multiple Access CFM Confirm C-plane Control Plane CTAPCCH Control APC Channel CTCH Control Channel DCCH Dedicated Control Channel DCK Derived Cipher Key DLC Data Link Control DLEI Data Link Endpoint Identifier

42、DS Direct Sequence DTCH Dedicated Traffic Channel FBCCH Fast Broadcast Control Channel FCS Frame Check Sequence FDD Frequency Division Duplex FEC Forward Error Correction FWPA Fixed Wireless for PSTN Access GCG Global Channel Group GLPT Global Pilot HDLC High-level Data Link Control IEs Information

43、Elements IND Indication ISDN Integrated Services Digital Network ISUI International Subscriber User Identity ATIS-0700717.2000 8 Kbps kilobits per second Ksps kilosymbols per second LAPC Link Access Procedure for the C-plane LAPCc Link Access Procedure for the C-plane (changed) LAPD Link Access Proc

44、edure for the D channel LAXPT Long Access Pilot LDCELP Low Delay Code Excited Linear Prediction LFSR Linear Feedback Shift Register LSB Least Significant Bit MAC Medium Access Control layer Mbps Megabits per second Mcps Megachips per second MSB Most Significant Bit MTC MAC Transaction Counter MTI MA

45、C Transaction Identifier MTN Message Transmission Number NLF New Link Flag NWK Network OSI Open Systems Interconnection PCM Pulse Code Modulation PHY Physical PI Peer Identity PN Pseudo-noise POTS Plain Old Telephone Service P-SAP Physical Layer Service Access Point PSTN Public Switched Telephone Ne

46、twork QoS Quality of Service QPSK Quadrature Phase Shift Keying REQ Request RES Response ReTx Retransmission Counter Variable RF Radio Frequency RR Receive Ready S-ACCH Spread Associated Control Channel SAP Service Access Point S-APCCH Spread Automatic Power Control Channel S-AXCH Spread Access Chan

47、nel ATIS-0700717.2000 9 SAXPT Short Access Pilot SBCCH Slow Broadcast Channel S-CTAPCCH Spread Control APC Channel S-CTCH Spread Control Channel S-FBCCH Spread Fast Broadcast Channel SMID Subscriber MAC Identity S-SBCCH Spread Slow Broadcast Channel S-TRCH Spread Traffic Channel TRCH Traffic Channel

48、 TRCH /16L Traffic Channel, 16 Kbps, low TRCH /32N Traffic Channel, 32 Kbps, normal TRCH /64L Traffic Channel, 64 Kbps, low TRCH /64N Traffic Channel, 64 Kbps, normal TSUI Temporary Subscriber User Identity V(A) Acknowledge State Variable V(R) Receive State Variable V(S) Send State Variable VBR Vari

49、able Bit Rate WANF Wireless Access Network Function WASF Wireless Access Subscriber Function XOR Exclusive OR 5 Medium Access Control (MAC) Sublayer 5.1 Introduction Figure 3 shows the reference model for the MAC sublayer of the Broadband Direct Sequence CDMA air interface. The details of the functional blocks within the MAC sublayer are defined in 5.2. This model is a functional description that may be physically implemented in different forms. Some functions may be combined in the actual implementation. ATIS-0700717.2000 10 GCGACGNWK Layer Higher LayersDLCSubla

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