1、TIAIEIA TELECOMMUNICATIONS SYSTEMS BULLETIN Enhanced System Access Procedures for E911 Calls for Analog Cellular TSBll9 OCTOBER 2000 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of Elsetronic Industries Alliance! NOTICE TWEI
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6、ion useful to the technical community, and represent approaches to good engineering practices that are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage other approaches that similarly represent good engineering practice, or that may be acceptable to, or
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8、 Bulletin from time to time as may be occasioned by changes in technology, industry practice, or government regulations, or for other appropriate reasons. (From Project No. 4559, formulated under the cognizance of the TIA TR-45.1 Subcommittee on Analog Technology.) Published by TELECOMMUNICATIONS IN
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10、al (303-397-7956) All rights reserved Printed in U.S.A. TINEIAITSB-119 1 . 2 . 3 . 4 . Table of Contents PURPOSE AND SCOPE 2 REFERENCES . 3 REPLACEMENT TEXT . 4 REVISION HISTORY . 14 i TIAfEIA/TSB-119 (THIS PAGE LEFT BLANK) II TINEINTSB-119 1. Purpose and Scope The Federal Communications Commission
11、has become involved in the resolution of issues concerning public safety in regards to enhanced call completion for E91 i originations. As a result of the FCC 99-096 Second Report and Order, changes to the TIAEIA-553-A specification are required. In order to comply with this Second Report and Order,
12、 this Technical Service Bulletin has been created. FCC 99-096 contains three different, approved methods to comply with the Second Report and Order. The changes contained in this TSB are intended to comply with only the first method provided for in FCC 99-096. 1 TIAfEIA/TSB-119 2. References 1. TIA/
13、EIA-553-A, 800 MHz Analog Cellular Systems Mobile Station - Base Station Compatibility, October 1999. 2. Federal Communications Commission - FCC 99-096 - Second Report and Order, June 1999. 1 2 3 4 5 6 7 a 9 10 11 12 13 14 15 16 17 ia 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 TINEIAITSB-119 3. Re
14、placement Text The following sections list text to replace the corresponding sections contained within TIA/EIA-553-A. 2.6.1.1 Retrieve system parameters _ If this task has been entered as a result of a power up condition the mobile station shall: Set PUREG, = O, PDREG, = O, LREG, = O, LRCC, = O, RAN
15、D, = O, PCSID, = O, BSPC, = O, BSCAP, = O, PCI-HOME, = O, PCI-ROAM, = O,SID, = O, and SIDr = O. Set the first-registration ID status to enabled. Set the first-idle ID status to enabled. Set the first-location-area ID status to enabled. Set the location-registration ID status to enabled. Set the emer
16、pencv-call status to disabled. Set the emergencv-call-failed status to disabled. Set the Update Protocol Capability ID status to disabled. If the preferred system (see 52.3.10) is System A, set the serving-system status to enabled; if the preferred system is System B, set the serving-system status t
17、o disabled. The mobile station shall then enter the Scan dedicated control channels Task (see $2.6.1. I. i). 2.6.1 .I .2 Update overhead information Overhead messages are sent in a group called an overhead message train (see $3.7.1.2). The mobile station shall use the value given in the NAWC (number
18、 of additional words coming) field of the system parameter overhead message in the train to determine that all messages of the train have been received. The END field shall be used as a cross-check. For NAWC-counting purposes, inserted control-filler messages (see $3.7.1) shall not be counted as par
19、t of the overhead message train. If the mobile station receives a BCH-code-correct but unrecognizable overhead message in the train, the mobile station shall count that message as part of the train for NAWC-counting purposes, but shall not attempt to execute the message. The mobile station shall tun
20、e to the strongest dedicated control channel and, within 3 seconds, receive a system parameter message (see $3.7.1.2) and update the following numeric information: System identification (SID,) Set the 14 most significant bits of SID, to the value of the SIDl field. Set the least significant bit of S
21、ID, to 1 if the serving-system status is enabled; otherwise, set the bit to O. Number of paging channels (N,). Set N, to 1 plus the value of the N-1 field. First paging channel (FIRSTCHP,). Set FIRSTCHP, according to the following algorithm: - If SID, = SIDp, FIRSTCHP, = FIRSTCHPp (see 32.3.7). 3 1
22、2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 TINEIAITSB-119 - If SID, # SIDp and the serving-system status is enabled, set FIRSTCHP, to the first dedicated control channel for System A (834.990 MHz mobile transmit, 879.990 MHz base transmit).
23、 - If SID, # SID, and the serving-system status is disabled, set FIRSTCHP, to the first dedicated control channel for System B (835.020 MHz mobile transmit, 880.020 MHz base transmit). Last paging channel (LASTCHP,). Set LASTCHP, according to the following algorithm: - If the serving-system status i
24、s enabled, LASTCHP, = FIRSTCHP, - Ns + 1 - If the serving-system status is disabled, LASTCHP, = FIRSTCHP, + Ns - 1 If SID, # SID, the mobile station shall set registration increment (REGINCR,) to its default value of 450, set the first-registration ID status to enabled, set the first-location-area I
25、D status to enabled, set LRCC, = O and set RAND, = O. The mobile station shall then enter the Paging channel selection Task (see $2.6. i .2). If the mobile station cannot complete this task on the strongest dedicated control channel and the emergency-call status is disabled, it may tune to the secon
26、d strongest dedicated control channel and attempt to complete this task within a second 3 second interval. If the mobile station cannot comdete this task on the strongest dedicated control channel and the emergency-call status is enabled. it shall tune to the second strongest dedicated control chann
27、el and attemDt to comdete this task within a second 3 second interval. If the mobile station cannot complete this task on either of the two strongest control channels and the emereencv- call status is disabled if the serving-system status is disabled, it may be enabled. If the mobile station cannot
28、comdete this task on either of the two strongest control channels and the emergency- call status is enabled, it shall check the servinmystem status: If the serving-system status is enabled. it shall be disabled: if the serving-system status is disabled, it shall be enabled. The mobile station shall
29、then enter the Scan dedicated control channels Task (see $2.6.1.1.1) 2.6.1.2.2 Verify overhead information The mobile station shall set the Wait-for-Overhead-Message bit (WFOM,) to O; the mobile station shall then tune to the strongest paging channel and, within 3 seconds, receive an overhead messag
30、e train (see $3.7.1.2) and update the following: System identification: Set the 14 most significant bits of SIDr to the value of the SIDI field. Set the least significant bit of SIDr to i if the serving-system status is enabled; otherwise, set the bit to O. ROAM status: The mobile station shall comp
31、are the received system identification (SIDr) with the stored system identification (SID,). If SIDI = SID, the mobile station shall compare SID, with SID,. If SID, = SID, the mobile station shall set the ROAM status to disabled. If SID, f SID, the mobile station shall set the ROAM status to enabled.
32、 If SID, # SID, the mobile station shall enter the Retrieve system parameters Task (see $2.6.1.1). Local control status: If the local control option is enabled within the mobile station (see $2.3.9) and the bits of the home system identification (SIDp) that comprise the group identification match th
33、e corresponding bits of SID, then the local control status shall be enabled. Otherwise, the local control status shall be disabled. 4 TINEIAITSB-119 1 Power-Up Registration: If SIDr # SIDs-p the mobile station shall set PUREGSp to O. 2 The mobile station shall then enter the Response to overhead inf
34、ormation Task (see $2.6.2.1) If the mobile station cannot complete this task on the strongest paging channel and the emerpencv-call status is disabled. it may tune to the second strongest paging channel and attempt to complete this task within a second 3 second interval. If the mobile station cannot
35、 complete this task on the strongest paging channel and the emergency-call status is enabled, it shall tune to the second strongest paging channel and attemDt to complete this task within a second 3 second interval. 9 10 11 If the mobile station cannot complete this task on either of the two stronge
36、st paging channels and the emergencv- call status is disabled, kmay check the serving-system status: If the serving-system status is enabled, it may be disabled; if the serving-system status is disabled, it may be enabled. If the mobile station cannot complete this task on either of the two stronges
37、t Daging channels and the emergencv- call status is enabled, it shall check the serving-svstem status: If the serving-svstem status is enabled, it shall be disabled; if the serving-system status is disabled, it shall be enabled. The mobile station shall then enter the Scan dedicated control channels
38、 Task (see $2.6.1.1 .i). 12 13 14 15 16 2.6.2.4 Call initiation 17 18 If the user requests termination of a call initiation at any time, the mobile station shall set the emergencv-call status to disabled and shall set the emergency-call-failed status to disabled. 19 20 If the emergency-call status i
39、s enabled, the System access Task (see 62.6.3) shall be entered with an “origination” indication. When the user desires to initiate a call: 21 22 23 - If the call initiation is to 91 1. the mobile station shall set the emergency-call status to enabled; otherwise. the mobile station shall set the eme
40、rgency-call status to disabled. 24 - If the emergencv-call status is enabled, the mobile station shall movide visual feedback to the user. - If the emerpency-call status is enabled, the mobile station may provide audible feedback to the user. 25 - The System access Task (see $2.6.3) shall be entered
41、 with an “origination” indication. 26 2.6.3.3 Retrieve access attempt parameters 27 The mobile station shall set the maximum-number-of-seizure-attempts allowed (MAXSZTR,) to a maximum of 1 O, and the maximum-number-of-busy-occurrences (MAXBUSY,l) to a maximum of 1 O. 28 29 The mobile station shall t
42、hen initialize the following to zero: Number of busy occurrences (NBUSY,) Number of unsuccessful seizure attempts (NSZTR,) 30 31 32 5 1 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 TIA/EIA/TSB-I 19 The mobile station shall then examine the read control-filler
43、 bit (RCF,). If RCF, = O, the mobile station shall then within 400 ms (+lo0 ms, -0 ms) set DCC, to the value in the DCC field of a received message, set SDCC1 and SDCC2s to O, set the power level (PL,) to O, and set WFOMs = O. If RCF, = 1, the mobile station shall then within 1000 ms (+IO0 ms, -0 ms
44、) read a control-filler message, set DCCs and WFOM, set SDCCls and SDCC2, to the values in the DCC, WFOM, SDCCI and SDCC2 fields of the message, respectively, and set PL, to the power level given by Table 2.1.2-1 for the value of the CMAC field of the message and the mobile station power class (see
45、gs2.1.2.2, 2.3.3, and 3.7.1.2.4). If the DCC field or the control-filler message is not received within the time allowed, then the mobile station shall examine the access timer. If the access timer has expired and the emergencv-call status is disabled, the mobile station shall enter the Serving-syst
46、em determination Task (see 92.6.3.12). If the access timer has exDired and the emergency-call status is enabled, the mobile station shall set the emergency-call-failed status to enabled and then enter the Serving-system determination Task (see 62.6.3.1 2). If the access timer has not expired, the mo
47、bile station shall enter the Alternate access channel Task (see $2.6.3.13). The mobile station shall then set BIS, to 1 and examine the WFOM, bit. If WFOM, = 1, the mobile station shall enter the Update overhead information Task (see $2.6.3.4). If WFOM, = O, the mobile station shall wait a random de
48、lay. Each time it waits a random delay, a different random delay shall be generated with the time uniformly distributed in the interval O to 92+1 ms and, if quantized, with granularity no more than 1 ms. The mobile station shall then enter the Seize reverse control channel Task (see $2.6.3.5). 2.6.3
49、.4 Update overhead information If this task is not completed within 1.5 seconds and the emerpencv-call status is disabled, the mobile station shall exit this task and enter the Serving-system determination Task (see $2.6.3.12). If this task is not comDleted within 1.5 seconds and the emerpencv-call status is enabled. the mobile station shall set the emergencv-call-failed status to enabled and then exit this task and enter the Serving-svstem determination Task (see 62.6.3.12). If the Update overhead information Task is completed, the mobile station shall
