1、 ANSI/TIA-136-360-1-E-2011 APPROVED: NOVEMBER 3, 2011 WITHDRAWN: JUNE 12, 2015 TIA-136-360-1E November 2011Packet Data Service- 136HS Indoor Overview NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturer
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19、 FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA/EIA-136-360-1E iii Contents 1 Introduction_ 1 2 Layer 1 (Physical Radio Interface)_ 1 2.1 Multiple access _ 1 2.2 Hyperframes, superframes and multiframes _ 1 2.3 Ti
20、meslot and Burst structure _ 2 2.4 Channel coding_ 3 2.5 Modulation _ 4 2.6 Set of Channels_ 4 3 Layer 2 (LLC, RLC and MAC) _ 5 3.1 Layer Services _ 6 3.2 Layer functions_ 6 4. Change History for TIA/EIA-136-360 _ 8 TIA/EIA-136-360-1E iv Figures Figure 1 Multiframe and burst structure _ 2 Figure 2 M
21、S Protocol architecture of Layer 2 _ 6 TIA/EIA-136-360-1E v Tables Table 1 Wideband Short Burst and Wideband Long burst fields _ 3 Table 2. ChannelCoding Details _ 4 TIA/EIA-136-360-1E vi THIS PAGE INTENTIONALLY LEFT BLANK TIA/EIA-136-360-1E 1 1 Introduction 1 2 GPRS-136 is the packet data service p
22、rovided in TIA/EIA-136 (also known as UWC-136). A 3 general description of the System Architecture and Protocol Descriptions is provided in TIA/EIA-4 136-330. 5 6 To provide very high data rates, GPRS-136 uses a 1.6 MHz bearer channel, also known as 136HS 7 Indoor. The upper layers of the GPRS-136 p
23、rotocol stack are common throughout UWC-136, 8 applying to each individual bearer (136+, 136HS Outdoor, and 136HS Indoor). This document 9 provides an Overview of the 136HS Indoor bearer channel, configured as a traffic channel 10 (PTCH), for GPRS-136. An RLC/MAC entity for the 136HS Indoor bearer c
24、hannel is specified in 11 TIA/EIA-136-362 and a Physical Layer is specified in TIA/EIA-136-361. 12 13 14 2 Layer 1 (Physical Radio Interface) 15 This overview describes the physical layer specified in TIA/EIA-136-361. If this overview 16 conflicts with TIA/EIA-136-361, 361 shall govern. 17 2.1 Multi
25、ple access 18 19 The access scheme is Time Division Multiple Access (TDMA) with from sixteen to sixty-four 20 basic physical channels per carrier. The carrier separation is a multiple of 200 kHz, typically 1.6 21 MHz. A physical channel is therefore defined as a sequence of TDMA frames and a time sl
26、ot 22 number (modulo 64). 23 The basic radio resource is a long timeslot (1/16 of a TDMA frame) or a short timeslot (1/64 of a 24 TDMA frame) lasting 288 s (15/52 ms) or 72 s (15/208 ms) and transmitting information at a 25 modulation rate of 2.6 Msymbols/s. This means that the time slot duration, i
27、ncluding guard time, 26 is 750 or 187.5 symbol durations. 27 28 2.2 Hyperframes, superframes and multiframes 29 30 A diagrammatic representation of all the time frame structures is in figure 1. The longest recurrent 31 time period of the structure is called a hyperframe and has a duration of 3 h 28
28、mn 53 s 760 ms (or 32 12,533.76 s). The TDMA frames are numbered modulo this hyperframe (TDMA frame number, 33 or FN, from 0 to 2,715,647). 34 One hyperframe is subdivided in 2,048 superframes which have a duration of 6.12 seconds. The 35 superframe is itself subdivided in multiframes. A 52-multifra
29、me has a duration of 240 ms, 36 comprising 52 TDMA frames. This multiframe is carries WPACCH, WPTCH WFCCH and 37 WSCH. The 52-multiframe itself is not shown in Figure 1, but can be seen as two 26-multiframes, 38 with TDMA frames numbered from 0 to 51. A TDMA frame, comprises sixty-four short (1/64)
30、39 time slots and has a duration of 4.62 (60/13) ms. 40 TIA/EIA-136-360-1E 2 2.3 Timeslot and Burst structure 1 2 Four different types of bursts exist in the system. A diagram of these bursts appears in Figure 1 3 and fields are specified in Table 1. 4 - wideband short burst (WSB): this burst is use
31、d to carry information on traffic and 5 associated control channels. It contains 144 symbols and includes a guard time of 10.5 6 symbol durations ( 4.04 s); 7 - wideband long burst (WLB): this burst is used to carry information on traffic channels. It 8 contains 706 symbols and includes a guard time
32、 of 11 symbol durations ( 4.23 s); 9 - wideband frequency correction burst (WFB): this burst is used for frequency 10 synchronization of the mobile. It is equivalent to an unmodulated carrier, shifted in 11 frequency, with the same guard time as the normal burst. The repetition of WFBs is also 12 na
33、med wideband frequency correction channel (WFCCH). 13 - wideband synchronization burst (WSYB): this burst is used for time synchronization of 14 the mobile. It contains a long training sequence and carries the reduced TDMA frame 15 number (RFN) and base station identity code (BSIC, see TIA/EIA-136-3
34、61). It is 16 broadcast together with the frequency correction burst. The repetition of WSYBs is also 17 named wideband synchronization channel (WSCH). 18 19 Figure 1 Multiframe and burst structure 20 21 0 1 2 3 22 23 24 251 (26-frame) multiframe = 26 TDMA frames (120)1 TDMA frame = 64 short time sl
35、ots (120/26 or 4.615 ms)063TS3Data 353 TrainingsequenceTS3GP11TS3Data 72 Trainingsequence27TS3Data 72 GP10.5Wideband Short Burst (WSB)Wideband Long Burst (WLB)TS3Data 39 Training sequence 93 TS3GP10.5WidebandShiiBurst (WSYB) Data 39TS3Fixed symbols 171 TS3GP10.5Wideband FrequencyCorrection Burst (WF
36、CB)1 short time slot = 187.5 symbol durations (15/208 or 72.1 us)Data 3531 long time slot = 750 symbol durations (15/52 or 0.288 us)0 1 2 3 4 5 6 2042 2043 2044 2045 2046 20471 hyperframe = 2048 superframes = 2 715 648 TDMA frames (3 h 28 mn 53 s 760)0 1 2 3 47 48 49 501 superframe = 1326 TDMA frame
37、s (6.12)(= 51 (26-frame)ltif )22 23 TIA/EIA-136-360-1E 3 Table 1. Wideband Short Burst and Wideband Long burst fields 1 Wideband Short Burst Wideband Long burst Symbol number Length of field Symbol number Length of field Contents of field 0-2 3 0-2 3 Tail symbols 3-74 72 3-355 353 Data symbols 75-10
38、1 27 356-382 27 Training sequence 102-173 72 383-735 353 Data symbols 174-176 3 736-738 3 Tail symbols 177-187 10.5 739-749 11 Guard period 2 2.4 Channel coding 3 4 Four different wideband modulation and coding schemes, WMCS-1 to WMCS-4, are defined for 5 the Radio Blocks carrying RLC Data blocks. F
39、or the Radio Blocks carrying RLC/MAC Control 6 blocks WMCS-1 is always used. 7 The first step of the coding procedure is to add a Block Check Sequence (BCS) for error 8 detection. The second step consists of pre-coding USF, adding six tail bits and rate 1/3 9 convolutional coding for error correctio
40、n that is punctured to give the desired coding rate. 10 The details of the codes are shown in Table 2, including: 11 - the modulation scheme 12 - the number of user data bits in each RLC block 13 - the peak data throughput per time slot 14 - the code rates for header and data blocks 15 - Data and he
41、ader block check sequence length 16 TIA/EIA-136-360-1E 4 Table 2. Channel Coding Details 1 Link Burst Modulation Data Blocksize (bits) Data rate (kbit/sec) Header code rate Data code rate BCS HCS WMCS-1 Uplink Short BOQAM 210 10.5 1/3 0.5 12 8 Long BOQAM 1334 66.7 1/3 0.5 12 8 Downlink Short BOQAM 2
42、10 10.5 1/3 0.5 12 8 Long BOQAM 1334 66.7 1/3 0.5 12 8 WMCS-2 Uplink Short BOQAM 441 22.1 1/3 1 12 8 Long BOQAM 571 114.2 1/3 1 12 8 Downlink Short BOQAM 438 21.9 1/3 1 12 8 Long BOQAM 568 113.6 1/3 1 12 8 WMCS-3 Uplink Short QOQAM 492 24.6 1/3 0.5 12 8 Long QOQAM 2740 137.0 1/3 0.5 12 8 Downlink Sh
43、ort QOQAM 492 24.6 1/3 0.5 12 8 Long QOQAM 2740 137.0 1/3 0.5 12 8 WMCS-4 Uplink Short QOQAM 1017 50.9 1/3 1 12 8 Long QOQAM 1277 255.4 1/3 1 12 8 Downlink Short QOQAM 1002 50.1 1/3 1 12 8 Long QOQAM 1262 252.4 1/3 1 12 8 2 2.5 Modulation 3 4 The data modulation is either Binary Offset QAM (BOQAM),
44、which is sometimes also referred to 5 as Offset QPSK (OQPSK), or Quaternary Offset QAM (QOQAM), which is sometimes also 6 referred to as Offset 16QAM. Offset QAM may in general be expressed as: 7 () ()() () ()st a ht kT t a ht k T tkkc kkc=+2211cos sin, 8 where c=2fc, fcis the carrier frequency, 1/T
45、 is the symbol rate (T=Tbfor Binary Offset QAM 9 and T=2Tbfor Quaternary Offset QAM), akis the kth data symbol taking on values of 1 for 10 Binary Offset QAM and 1 and 3 for Quaternary Offset QAM and h(t) is the impulse response 11 of the shaping filter. The difference between Offset QAM and convent
46、ional QAM is the delay of 12 T (half a symbol period for QAM) in the quadrature branch. This time shift prevents zero-crossing 13 signal transitions. 14 The pulse shaping filter has square root raised cosine spectrum with impulse response given by: 15 ()() ()()htETtTtT tT tTtT=+ +2121242 1214 22 /si
47、n / / cos /, 16 which is uniquely defined by the roll-off factor . Here, the value 0.35 is chosen for the roll-off 17 factor . E is the energy of the pulse h(t) (usually normalized to 1). 18 2.6 Set of Channels 19 20 The radio subsystem provides the following two logical channels: 21 TIA/EIA-136-360-1E 5 1) The packet traffic channel (PTCH) carries user informati
