ImageVerifierCode 换一换
格式:PDF , 页数:14 ,大小:118.88KB ,
资源ID:541325      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-541325.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ATIS 0700039-2018 Guidelines for Emergency Call Location Selection and Reporting by Originating Networks.pdf)为本站会员(figureissue185)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ATIS 0700039-2018 Guidelines for Emergency Call Location Selection and Reporting by Originating Networks.pdf

1、ATIS-0700039 ATIS Standard on Guidelines for Emergency Call Location Selection and Reporting by Originating Networks Alliance for Telecommunications Industry Solutions Approved May 16, 2018 Abstract A voluntary agreement for improving location accuracy for emergency calls was developed and signed on

2、 November 14, 2014, by APCO, NENA, AT see Table 5.1). It is likely that in use case 4 (see Table 5.3) a building or place type of RSS or RMS will correspond to a Class of Service value of WDL2, whereas a building or place type of OBM will correspond to a Class of Service value of WDL1 (see Clause 5.

3、1.8). Dispatchable Location Test Bed testing will further clarify these relationships. NOTE: The use of serviceFlag is an inherent part of the LS filtering process. It is likely that in use case 4 with building or place type RSS or RMS will correspond to WDL2. In use case 4 with a building or place

4、type of OBM will correspond to WDL1. Dispatchable Location Test Bed testing will further clarify these relationships. NOTE: Any Use Case could be found within any Place Type. e. Geodetic location obtained from the location determination equipment. f. Serving cell geo coordinates from the cellular ne

5、twork. g. Wi-Fi Access Point. a. MAC Address. i. servingFlag. ii. RSSI. iii. Round trip delay. iv. Channel number. h. Bluetooth beacon (BT-PDA). a. RSSI. ATIS-0700039 9 5.1.6 LS Messaging toward the GMLC (Step 6) Once the LS has obtained the geodetic location and potentially determined a Dispatchabl

6、e Location, it forwards that information to the GMLC through the MME. Attributes forwarded to the GMLC: a. Dispatchable Location (in PIDF-LO from NEAD). b. Method of NEAD-CVC, NEAD-DL1 or NEAD-DL2 (generated by the LS). c. Place Type (in PIDF-LO from NEAD). d. Geodetic location obtained from the loc

7、ation determination equipment. e. Positioning Method of obtaining geodetic location e.g., Assisted Global Positioning System (AGPS). 5.1.7 E2 Response to the Legacy ALI (Step 7) Once the GMLC receives the location information from the LS, it must map the geodetic location and Dispatchable Location i

8、nto the E2 format. It then must determine a Position Source depending upon the information it obtained. The following shows an example of the Location Description parameter populated in the E2 response using example 4 in Table 5.2. 896 N Main ANYTOWN FLOOR 5 ROOM 501 If the XML elements associated w

9、ith the Dispatchable Location exceed the associated E2 element length, the GMLC truncates the string from right to left (left justified). The GMLC populates the Position Source based on a mapping from the location method token value provided in the PIDF-LO from the LS. The GMLC maps a method token v

10、alue of NEAD-CVC to Position Source 55, a location method token value of NEAD-DL1 to Position Source 56, and a location method token value of NEAD-DL2 to Position Source 57. 5.1.8 ALI to PSAP Location Conveyance (Step 8) Once the ALI receives the geodetic location and Dispatchable Location in the E2

11、 response, it returns those along with Class of Service to the PSAP in response to an ALI query. It will convert the Position Source it received in the E2 response into the corresponding Class of Service. If elements received in the E2 response are longer than can be utilized by the PSAP CPE, the AL

12、I truncates the string from right to left (left justified). 6 Location Selection It is expected that wherever possible, the callers estimated geodetic (latitude and longitude), with confidence and uncertainty, will be provided to the ALI servers. Any other location capabilities (i.e., device-based h

13、ybrid) should also be considered in the determination of best latitude and longitude, including z-axis when available. In addition, where available from NEAD data, a chosen AP or BT associated civic address and sub-address location data set will be provided through the E2 and ALI server process to t

14、he PSAP8. Where the NEAD does not provide sufficient coverage, such data may not be available for a given 9-1-1 call, or verification actions may indicate that populated data is not appropriate for use. 8Note that truncation of the location data may be necessary due to limitations in legacy location

15、 delivery protocols and PSAP CPE. ATIS-0700039 10 Additional evaluation in specific carrier location services processing will determine which NEAD AP or BT address and location data that is available should be utilized. Present considerations of concern to Public Safety are listed below and are not

16、meant to be all inclusive. It is expected that additional considerations will be derived over the course of the NEAD multi-year development and deployment life cycle and may result in future revisions. 1. All geodetic locations, including handset derived locations, should be evaluated based on avail

17、able information for quality, timing, and dependability in relation to other location choices for a given 9-1-1 call. Factors to enter into such evaluation include calculated uncertainty and technology type. For example, a small uncertainty device-based hybrid geodetic fix can be used as a distingui

18、shing factor between two candidate Dispatchable Locations returned by the NEAD to the LS. High quality geodetic fixes should be used in aiding the correct selection of DL. 2. When available, the presence of a servingFlag that ties a given user device to a related AP should be utilized to differentia

19、te between surrounding multiple AP instances. This will tend to make the chosen address more relevant to determining the likely user location than if the servingFlag is not utilized. When servingFlag is present it may be more definitive than RSSI based on the assumption that the Wi-Fi access point t

20、hat the device is attached to is the most representative of the users device location. Therefore, higher weighting should be given to the serving access point, especially in consideration of certain building types. For example, in residential environments (e.g., RMS), it may be assumed the caller is

21、 connected to the access point in their own home even if a neighbors Wi-Fi beacon signal is stronger. 3. PlaceType is an important parameter and should be provisioned in the NEAD whenever possible. If PlaceType is available, it is expected to influence the selection of the NEAD-based location and ma

22、y be used in the determination of CVC, DL1, or DL2 labels. The PlaceType should be sent toward the PSAP (e.g., MPC-E2-ALI interfaces). 4. In conjunction with all other parameters, AP signal strength should be considered in the selection of Dispatchable Location. Received Wi-Fi AP signal strength, pa

23、rticularly for APs whose civic addresses are provisioned in the NEAD, is very useful information, which can be used to augment decision making regarding DL or the class of DL. Even in the presence of a serving flag for an AP, signal strength can help differentiate between DL2 and DL1 in a multi-floo

24、r, multi-unit building. Furthermore, in the absence of a serving flag, AP signal strength can help distinguish between CVC and a likely DL1. This is because the received Wi-Fi signal level at the handset correlates well with the number of walls or floors that the signal penetrates to arrive at the h

25、andset. Empirical testing can provide guidance for signal level thresholds that can be used, either in the presence or absence of other factors, to aid in making decisions, including DL2 versus DL1, DL1 versus CVC, and CVC versus a situation where the Wi-Fi signal is likely to be from a neighboring

26、building. 5. Loading of NEAD data must involve an address validation action i.e., Master Street Address Guide (MSAG) or Location Validation Function (LVF), in order to verify the content and format of the data for each AP or BT Reference Point. 6. When the APs or BT Reference Points recognized by th

27、e user device are passed to the NEAD database, the returned result is cross-checked at the Location Server with other available location information to determine whether the AP/BT data may be appropriate to use. This check indicates appropriate proximity with the cell tower and sector data. For exam

28、ple, the geocoded information associated with the civic address of the AP/BT should be in the vicinity of the cell site serving the caller. The exact relationship should be defined and tested during NEAD location accuracy testing in the national Test Bed process. 7. A goal of the location services p

29、rocess is to have consistent Dispatchable Location results delivered from different carriers to the PSAP under similar call circumstances. 8. There should be testing of the location determination system as a whole, which arises from the interactive and interdependent elements of the location determi

30、nation process, including location services logic, NEAD, MPC/GMLC actions, and the ALI server. 9. The NEAD test bed and any other efforts to define how the NEAD related results should be evaluated to help refine the location services processes among carriers to improve the quality and consistency of

31、 the results delivered to the PSAPs. 6.1 Specific Position Methods For further study. ATIS-0700039 11 6.2 Multiple Position Methods For further study. 7 Position Reporting for PSAPs Clauses 5.1.7 and 5.1.8 discuss the interactions between a GMLC and the ALI, and between the ALI and the PSAP, respect

32、ively. Specifically, Clause 5.1.7 discusses how the GMLC will receive the geodetic location and civic location and convert them into an E2 response. The geodetic location will be populated in a Wireless Phase II format. The civic address will be formatted into XML elements and sub address elements a

33、nd will be populated in the LOC field of the E2 response. The LOC field is limited to 60 characters and if the total number of characters exceeds 60 characters, the lower-priority sub-elements will be truncated. The priority of converting XML elements into the LOC field in the E2 Location Descriptio

34、n parameter is as follows (highest on left to lowest on right): BLD|FLR|UNIT|ROOM|SEAT|MP|LOC|LMK (or LMKP) |PLC|UBP The method token value in the PIDF-LO received from the Location Server is converted by the GMLC into Position Source values. The GMLC converts the method token value of NEAD-CVC to P

35、osition Source 55 (CVC), a method token value of NEAD-DL1 to Position Source 56 (DL1), and a method token value of NEAD-DL2 to Position Source 57 (DL2). As discussed in Clause 5.1.8, the ALI server will convert the information it receives in the E2 response into a format that can be transmitted to t

36、he PSAP. The geodetic location will be presented in the same manner as for a Wireless Phase II call. The civic address will be presented in the manner that has been agreed upon by the ALI provider and the PSAP administrator, unless the PSAP CPE provides a modification of the format. In order to disp

37、lay the sub address elements, the PSAP must have the capability to display them on the Telecommunicator screen. If the display has restrictions on the size of the location field, then some information may be truncated and therefore not displayed. For example, some PSAPs have a limit of 20 characters

38、 that can be displayed on the screen. If the GMLC returns 60 characters and the PSAP has a limitation of 20 characters, some important information regarding location may not be displayed. PSAP administrators should evaluate their display formats to assess the impact of receiving sub addressing infor

39、mation. The ALI will convert the Position Source values it received into Class of Service enumerations. It is recommended that PSAPs use these new Class of Service designations and display them on the Telecommunicator display screen. The ALI server will convert Position Source 55 (CVC) to Class of S

40、ervice WCVC, Position Source 56 (DL1) into Class of Service WDL1, and Position Source 57 (DL2) into Class of Service WDL2. 8 Conclusions The guidelines and recommendations presented in this document are based on a combination of conceptual definitions and very limited functional testing of the inter

41、actions between locations servers in wireless networks and the NEAD. As such, the guidelines are initial and broad in nature. As stated under Clause 6, various details pertaining to these guidelines may be refined or expanded as more comprehensive Dispatchable Location testing takes place according

42、to the guidelines in ATIS-0500035. With every test program and analysis of the resulting data, it will be possible to gain a deeper understanding of the interactions between different location servers and the NEAD, the decision-making processes leading to Dispatchable Location determination, and the desired versus achievable Dispatchable Location outcomes under a wide range of conditions. This will lead to more refined guidelines to achieve enhanced Dispatchable Location performance and to promote consistent Dispatchable Location outcomes across networks under similar conditions.

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1