WO2008019539A1 - Procédé de triangulation d'appel de groupe conventionnel dans des systèmes numériques de télécommunication à l'alternat - Google Patents

Procédé de triangulation d'appel de groupe conventionnel dans des systèmes numériques de télécommunication à l'alternat Download PDF

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Publication number
WO2008019539A1
WO2008019539A1 PCT/CN2006/003687 CN2006003687W WO2008019539A1 WO 2008019539 A1 WO2008019539 A1 WO 2008019539A1 CN 2006003687 W CN2006003687 W CN 2006003687W WO 2008019539 A1 WO2008019539 A1 WO 2008019539A1
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Prior art keywords
epn
terminal
base station
group call
traditional group
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PCT/CN2006/003687
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English (en)
French (fr)
Inventor
Haocun Du
Yuanfang Yu
Yi Zeng
Xiaoxia Hou
Fangyü ZHU
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Zte Corporation
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Publication of WO2008019539A1 publication Critical patent/WO2008019539A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10Push-to-Talk [PTT] or Push-On-Call services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/40Connection management for selective distribution or broadcast
    • H04W76/45Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Definitions

  • the present invention relates to the field of mobile communications, and a method for positioning a specific user in a traditional group call digital trunking communication system by adding a positioning technology based on a trunking communication system.
  • a digital trunking communication system is a system that can provide mobile scheduling services to professional or public users, and represents the development direction of a dedicated mobile communication network.
  • the traditional group call cluster system has the characteristics of channel sharing and unlimited capacity of single-carrier fans.
  • GPS-One and GPS positioning technologies require the support of special terminal chips, which requires the replacement of new terminals.
  • the processing procedure of the triangulation is: using the positioning center (MPC: Mobile Position Center) to initiate a measurement request report to the base station, and the base station sends a wireless location measurement request to the terminal in the call, after receiving the measurement request, the terminal receives the measurement request.
  • the pilots of the active set and the candidate set are reported to the base station. If the terminal is under the coverage of multiple base stations, the specific geographic location of the terminal can be calculated through the information reported by the terminal to meet the requirements of the positioning terminal.
  • the EPN (earliest PN offset) is an important parameter used in the triangulation system.
  • the EPN can calculate the target one-way delay and one-way service delay of the terminal to the base station.
  • one channel corresponds to one terminal, and the EPN is obtained by periodic reporting by the channel board. The period is short and may be fluctuating, but not large.
  • the traditional group call service is an extension of the Push To Talk group call service, which is used to solve the limitation on the air capacity of the original group call service, and realizes the communication between the traditional group call initiator and all users in the group.
  • the main features of the traditional group call service function: unlimited capacity of single-carrier fan and forward channel sharing.
  • the single-load fan has unlimited capacity. Under the single-load fan, it supports unlimited capacity of single-group calls.
  • the capacity of single-group users in each sector is not limited. It can use limited resources, especially wireless resources, to support emergency situations.
  • Forward channel sharing shared traffic channel for the purpose of group user forward channel sharing With the same Walsh code, frame offset and long code mask, and the same service frame content at the same time, the transmission of the corresponding parameters must be added in the signaling flow.
  • a forward voice channel is shared in the group; in the group, users in the same carrier fan share a forward signaling channel; the channel information is directly allocated through the broadcast channel assignment message, and the terminal directly establishes the corresponding channel.
  • the acquisition of the EPN also depends on the channel board, but because the front reverse channel is shared, multiple terminals share the same channel, and the terminal and the channel are no longer corresponding, so if the traditional EPN is adopted In this case, the EPN of the channel board may be the terminal A at a certain moment, but the EPN of the channel board at another moment may be the terminal B, because the geographical position of the terminal A and the terminal B may be different. Far away, in this way, EPN changes will be very large, and the correct EPN will not be obtained. The EPN is not accurate and directly affects the accuracy of the final calculated position.
  • the present invention provides a traditional group call triangle positioning of a cluster system that acquires a correct EPN in a triangulation service in the case of a reverse channel sharing before a PTT conventional group call cluster system.
  • Implementation method In order to achieve the above object, the method for implementing the traditional group call triangle positioning of the digital trunking communication system of the present invention is characterized in that: the following steps are included:
  • the base station receives the PTT traditional group call service message from the terminal, and the base station advertises the PN and EPN of the terminal to the upper layer application of the base station;
  • the PTT traditional group call service message described in the step (1) is a power strength measurement message sent by the user, or a message sent by the user.
  • the step (2) includes the following steps: (21) applied by the base station on the upper substrate; a PN Analyzing the backsheet ⁇ : Gen with the corresponding PN PN EPN is a reference, and if yes, step (22); if not, step (23);
  • the upper layer application of the base station calculates the service one-way delay of the terminal, and reports it to the network side positioning center to calculate the location of the terminal, and the step ends;
  • the upper layer application of the base station calculates the EPN of the reference PN according to the existing reference PN and the PN and EPN reported by the bottom layer, and then calculates the target one-way extension of the terminal, and reports it to the network side positioning center to calculate The location of the terminal ends.
  • the step (21) is specifically: the upper layer application of the base station compares the PN value reported by the bottom layer with the reference PN value, and if the two are equal, the bottom layer reports the same
  • the EPN corresponding to the PN is the EPN of the reference PN, and step (22) is performed; otherwise, step (23) is performed.
  • FIG. 1 is a flow chart of a PTT scheduling server to a terminal
  • FIG. 2 is a flow chart of a terminal to a PTT scheduling server
  • FIG. 3 is a flowchart of processing of a bottom layer of a base station
  • the technical solution of the present invention is: After receiving the air interface message sent by the terminal, the bottom layer of the base station determines that if it is a user and is a PSMM (Power Intensity Measurement) message, The PN and EPN collected by the chip are added to the message and reported to the upper application; if it is the user, the PN and EPN collected by the chip are added to the message. After receiving the measurement response message, the upper-layer application judges that the EPN directly reports the service one-way delay if it is the reference PN. If not, it calculates the EPN of the reference PN according to the EPN collected by the chip, and then calculates the target one-way delay.
  • PSMM Power Intensity Measurement
  • the specific steps of the present invention may include: Step 1: The bottom layer determines that if the user is listening to the user and is a PSMM message, the PN and EPN collected by the chip are added to the message to report to the upper application, and the process proceeds to step 3; 2 processing; Step 2: The bottom layer judges if the user is said, the ⁇ and ⁇ collected by the chip are added to the message and reported to the upper application; Step 3: After the upper application receives the message reported by the bottom layer, it determines that the underlying report is If it is, use the existing technology to calculate the service one-way delay, and report it to the cluster dispatcher server through the cluster dispatcher client, and the network side location center calculates the location of the terminal; if not, go to the step line.
  • Step 4 The upper layer application judges that the underlying report is not the reference ,. According to the current ⁇ , PN and reference PN reported by the bottom layer, the reference PN ⁇ ' can be calculated, and the target one-way delay is calculated, after the cluster dispatching station client The end reports to the cluster dispatcher server. The location of the terminal is calculated by the network side positioning center.
  • Figure 1 and Figure 2 illustrate the triangulation process.
  • Figure 3 and Figure 4 illustrate the process of calculating the internal parameters and related parameters of the base station.
  • Figure 1 includes the following steps:
  • the base station receives the message sent by the cluster dispatching station server by using the cluster dispatching station client;
  • the base station detects, according to the message type, whether the message is a wireless location measurement request message, if it is not a wireless location measurement request message, go to step 103; if it is a wireless location measurement request message, go to step 104;
  • the base station performs processing on the corresponding message according to the type of the message
  • the base station detects the validity of the message; if the message has an error, go to step 105; otherwise, go to step 106;
  • the base station returns a message to the cluster dispatcher server through the cluster dispatching station client, and the message carries a reason value;
  • the base station receives the message sent by the terminal by using an air interface.
  • the base station determines whether it is a PTT traditional group call and is a positioning message, if yes, go to step 203; otherwise, go to step 207;
  • the base station determines whether the message is a wireless measurement response message; if not, go to step 204; otherwise, go to step 205;
  • the base station performs processing on the corresponding message according to the type of the message.
  • the base station calculates the target one-way delay, and the step 4 is 206;
  • the base station constructs a wireless location measurement response message, and sends the PTT scheduling server to the PTT scheduling server, where the network side calculates the location of the mobile phone.
  • Figure 3 includes the following steps:
  • the bottom layer receives a message sent by the terminal from the air interface
  • the bottom layer determines whether the PTT traditional group call service, if yes, go to step 303; if not, go to step 307;
  • the bottom layer determines whether it is a listening user and is a PSMM message. If yes, go to step 304; if not, go to step 305;
  • the bottom layer writes the EPN, PN into the PSMM message to report to the upper application and proceeds to step 307;
  • the bottom layer is said to be a user message, if yes, go to step 306; otherwise, go to step 307;
  • step 306 the bottom layer in the first frame of the segmentation signaling fills in the EPN, PN 4 report to the upper application and proceeds to step 307;
  • Figure 4 includes the following steps: 401.
  • the upper application receives the message reported by the bottom layer;
  • the upper application determines whether it is a traditional group call and is a positioning message, if yes, go to step 403; otherwise, go to step 408;
  • the upper layer determines whether the EPN corresponding to the PN on the bottom layer is the EPN of the reference PN by determining whether the PN reported by the bottom layer is equal to the RefPN (reference PN), if yes, go to step 346; otherwise, go to step 405;
  • the upper layer application calculates a monthly one-way delay to step 407;
  • the upper layer application calculates the EPN of the reference pilot according to the collected EPN and proceeds to step 406;
  • the upper application calculates a target one-way delay to step 407;
  • the upper layer application constructs the wireless measurement location response message and sends the PTT scheduling server to the PTT scheduling server, where the network side calculates the location of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Description

数字集群通信系统传统组呼三角定位的实现方法 技术领域 本发明涉及移动通信领域,在基于集群通信系统中加入定位技术,在传统 組呼数字集群通信系统中实现对特定用户定位的方法。 背景技术 数字集群通信系统是一种可以向专业或公众用户提供移动调度服务的系 统, 代表着专用移动通信网的发展方向。 传统组呼集群系统具有信道共享、 单 载扇无限容量等特点。 在目前已有的定位方式中, GPS-One、 GPS定位技术需 要专门终端芯片的支持, 要求更换新型终端才能实现。 三角定位的处理流程是: 利用定位中心 (MPC: Mobile Position Center ) 向基站发起对某个终端的位置的测量请求报告, 基站向正在通话中的终端发出 无线位置测量请求, 终端收到测量请求后把自身的有效集和候选集中的导频报 告给基站, 如果终端处在多个基站的覆盖下的时候, 通过终端报告的信息就可 以计算出终端的具体的地理位置, 达到定位终端的要求。
EPN ( Earliest PN offset )是三角定位系统中用到的一个重要参数, 通过 EPN, 可以计算出终端对某一个基站的目标单向延迟、 服务单向延迟, 上报给 网络侧计算终端的位置。 在目前已有的其它业务中, 一个信道对应一个终端, EPN的获得, 靠信道板周期性上报, 周期艮短, ΕΡΝ可能会有波动, 但不会很 大。 传统组呼业务是 ΡΤΤ ( Push To Talk )组呼业务的一个扩展, 用于解决原 组呼业务空中容量上的限制, 实现传统组呼发起者和群组内所有用户的通信。 传统组呼业务功能的主要特征: 单载扇无限容量和前向信道共享。 单载扇无限容量,单载扇下支持单组组呼无限容量,对每个扇区下单组用 户容量不受限, 能利用有限的资源, 特别是无线资源, 来支持在出现紧急情况, 用户集中条件下的指挥调度等功能; 在同一扇区下组内用户数多少对接入时间 没有影响。 前向信道共享, 为了达到群组用户前向信道共享的目的,共享的业务信道 具有相同的 Walsh码, 帧偏置和长码掩码, 并且同一时刻的业务帧内容相同, 在信令流程上必须增加相应参数的传递。 前向链路, 群组内共享一条前向语音 信道; 群组内, 同一载扇下的用户共享一条前向信令信道; 通过广播信道指配 消息直接分配小区信道资源, 终端直接建立相应信道, 不需要与基站信令握手 和业务协商, 以此提高终端的接入和切换速度; 反向链路, 反向链路同时只能 有一个用户说话, 说用户独占反向语音信道; 群组内, 同一载扇下听用户共享 一条反向信令信道, 反向信令传输采用随机发送策略。 在 PTT传统组呼中, EPN的获取也要靠信道板上报, 但因为前反向信道 共享, 多个终端共享同一条信道, 终端与信道不再——对应, 这样如果采取传 统的获取 EPN的做法, 靠信道板周期性上报, 那么某一时刻信道板报的 EPN 可能是终端 A的, 但另一时刻信道板 4艮的 EPN又可能是终端 B的, 因为终端 A和终端 B地理位置可能相差很远, 这样, EPN变化会很大, 是得不到正确的 EPN的。 EPN获取不准, 直接影响最终计算出来的位置的精度。 发明内容 十对现有技术存在的缺陷和不足, 本发明提供一种在 PTT传统组呼集群 系统前反向信道共享的情况下,在三角定位业务中获取正确 EPN的集群系统传 统组呼三角定位的实现方法。 为了达到上述发明目的,本发明数字集群通信系统传统组呼三角定位的实 现方法, 其特征在于: 包括以下步骤:
( 1 )基站收到来自终端的 PTT传统组呼业务消息, 基站底层把该终端的 PN和 EPN 告给基站上层应用;
( 2 )基站上层应用根据所述的 PN和 EPN计算出所述终端的目标单向延 迟或服务单向延迟, 上报给网络侧定位中心, 计算出所述终端的位置。 上述的数字集群通信系统传统组呼三角定位的实现方法中, 步骤 ( 1 ) 中 所述的 PTT传统组呼业务消息是听用户发送的功率强度测量消息,或者说用户 发送的消息。 上述的数字集群通信系统传统组呼三角定位的实现方法中,所述步骤( 2 ) 包 4舌以下步骤: ( 21 )基站上层应用通过底层上; 的 PN判断底层上^ :艮的与该 PN对应的 EPN是否为参考 PN的, 如果是, 执行步骤(22 ); 如果不是, 执行步骤(23 );
( 22 )基站上层应用计算出所述终端的服务单向延迟,上报给网络侧定位 中心以计算出所述终端的位置, 步骤结束;
( 23 )基站上层应用根据已有的参考 PN和底层上报的 PN和 EPN计算出 所述参考 PN的 EPN, 进而计算出所述终端的目标单向延远, 上报给网络侧定 位中心以计算出所述终端的位置, 步骤结束。 上述的数字集群通信系统传统组呼三角定位的实现方法中 ,所述步骤( 21 ) 具体为: 基站上层应用比较底层上报的 PN值和参考 PN值, 如果二者相等, 则底层上报的与该 PN对应的 EPN为参考 PN的 EPN, 执行步骤( 22 ); 否则, 执行步骤( 23 )。 本发明解决了在传统組呼数字集群系统中前反向信道共享时获取 EPN不 准的问题, 实现了移动终端的准确定位, 以便开展各种集群定位业务。 附图说明 图 1为 PTT调度服务器到终端流程图; 图 2为终端到 PTT调度服务器流程图; 图 3为基站底层的处理流程图; 图 4为基站上层应用的处理流程图。 具体实施方式 下面结合附图对本发明作进一步的详细说明: 本发明的技术方案是: 基站底层收到终端发来的空中接口消息后,判断如 果是听用户且是 PSMM (功率强度测量)消息, 就把芯片采集到的 PN和 EPN 添加到消息中报告给上层应用; 如果是说用户, 就把芯片采集到的 PN和 EPN 添加到消息中 ·ί艮告给上层应用。上层应用收到测量响应消息后,判断 EPN如果 是参考 PN的, 就直接上报服务单向延迟, 如果不是, 则要根据芯片采集到的 EPN推算出参考 PN的 EPN, 再计算目标单向延迟。 本发明的具体步骤可以包括: 步骤 1; 底层判断如果是听用户且是 PSMM消息, 就把芯片采集到的 PN 和 EPN添力 σ到消息中报告给上层应用, 进入步骤 3; 否则转入步骤 2处理; 步骤 2: 底层判断如果是说用户, 就把芯片采集到的 ΡΝ和 ΕΡΝ添加到消 息中报告给上层应用; 步骤 3: 上层应用收到底层上报的消息后, 判断底层报的 ΕΡΝ是不是参 考 ΡΝ的, 如果是, 利用现有技术计算出服务单向延迟, 经过集群调度台客户 端向集群调度台服务器上报,供网络侧定位中心计算出终端的位置;如果不是, 转入步線 4; 步骤 4: 上层应用判断底层报的 ΕΡΝ不是参考 ΡΝ的,根据当前底层上报 的 ΕΡΝ、 PN和参考 PN, 可以计算出参考 PN的 ΕΡΝ' , 计算出目标单向延迟, 经过集群调度台客户端向集群调度台服务器上报。 供网络侧定位中心计算出终 端的位置。 图 1、 图 2说明了三角定位流程, 图 3、 图 4说明了基站内部获取 ΕΡΝ及 相关参数计算的处理过程。 图 1包括以下步骤:
101、 基站通过集群调度台客户端收到集群调度台服务器发出的消息;
102、 基站根据消息类型检测该消息是否是无线位置测量请求消息, 如果 不是无线位置测量请求消息, 转步骤 103; 如果是无线位置测量请求消息, 转 步骤 104;
103、 基站根据其消息类型进行相应消息的处理;
104、 基站检测该消息的合法性; 如果该消息有错误, 转步驟 105; 否则 转步骤 106;
105、 基站经过集群调度台客户端向集群调度台服务器返回消息, 消息中 带上原因值;
106、 该消息正常, 基站通过空中接口将无线位置测量请求消息发送给手 机。 图 2包括以下步骤:
201、 基站通过空中接口收到终端发来的消息;
202、基站判断是否是 PTT传统組呼且是定位消息, 如果是, 转步骤 203; 否则转步 207;
203、 基站判断该消息是否是无线测量响应消息; 如果不是, 转步骤 204; 否则转步 205;
204、 基站根据其消息类型进行相应消息的处理;
205、 基站计算目标单向延迟, 转步 4聚 206;
206、 基站构造无线位置测量响应消息, 经 PTT调度客户端发给 PTT调 度服务器, 供网络侧计算出手机的位置;
207、 结束。 图 3包括以下步骤:
301、 底层从空中接口收到终端发来的消息;
302、 底层判断是否是 PTT传统组呼业务, 如果是, 转步骤 303 ; 如果不 是, 转步驟 307;
303、 底层判断是否是听用户且是 PSMM消息。 如果是, 转步骤 304; 如 果不是, 转步骤 305;
304、底层把 EPN、 PN写入 PSMM消息中报告给上层应用并转步骤 307;
305、 底层判断是说用户消息, 如果是, 转步骤 306; 否则转步 307;
306、底层在分段信令第一帧填写 EPN、PN 4艮告给上层应用并转步骤 307;
307、 底层处理结束。 图 4包括以下步骤: 401、 上层应用收到底层上报的消息;
402、 上层应用判断是否是传统组呼且是定位消息, 如果是, 转步骤 403 ; 否则转步骤 408;
403 > 上层应用通过判断底层上报的 PN与 RefPN (参考 PN )是否相等, 确定底层上 的与该 PN相对应的 EPN是否为参考 PN的 EPN, 如果是, 转步 ¾ 404; 否则转步骤 405;
404、 上层应用计算出月艮务单向延迟转步骤 407;
405、 上层应用根据采集的 EPN计算出参考导频的 EPN并转步骤 406;
406、 上层应用计算出目标单向延迟转步骤 407;
407、 上层应用构造无线测量位置响应消息经 PTT调度客户端发给 PTT 调度服务器, 供网络侧计算出终端的位置;
408、 结束。

Claims

1. 一种数字集群通信系统传统组呼三角定位的实现方法, 其特征在于: 包
^"以下步骤:
( 1 )基站收到来自终端的 PTT传统组呼业务消息, 基站底层把芯 片采集到的该终端的 PN和 EPN报告给基站上层应用;
( 2 ) 基站上层应用 ^^据所述的 PN和 EPN计算出所述终端的目标 单向延迟或服务单向延迟, 上报给网络侧定位中心, 计算出所述终端的 权
位置。
2. 根据权利要求 1 所述的数字集群通信系统传统组呼三角定位的实现方 法, 其特征在于: 步骤 (1 ) 中所述的 PTT传统组呼业务消息是听用户 发送的功率强度测量消息或说用户发送书的消息。
3. 根据权利要求 1 所述的数字集群通信系统传统組呼三角定位的实现方 法, 其特征在于: 所述步骤 (2 ) 包括以下步骤:
( 21 ) 基站上层应用通过底层上 4艮的 PN判断底层上 4艮的与该 PN 对应的 EPN是否为参考 PN的, 如果是, 执行步骤 (22 ); 如果不是, 执行步骤 ( 23 );
( 22 )基站上层应用计算出所述终端的服务单向延迟, 上4艮给网络 侧定位中心以计算出所述终端的位置, 步據结束;
( 23 )基站上层应用根据已有的参考 PN和底层上报的 PN和 EPN 计算出所述参考 PN的 EPN, 进而计算出所迷终端的目标单向延迟, 上 寺艮给网络侧定位中心以计算出所述终端的位置, 步 结束。
4. 根据权利要求 3 所述的数字集群通信系统传统組呼三角定位的实现方 法, 其特征在于: 所述步骤 (21 ) 具体为: 基站上层应用比较底层上 的 PN值和参考 PN值, 如果二者相等, 则底层上 ^艮的与该 PN对应的 EPN为参考 PN的 EPN, 执行步驟 ( 22 ); 否则, 执行步骤 ( 23 )。
PCT/CN2006/003687 2006-08-11 2006-12-29 Procédé de triangulation d'appel de groupe conventionnel dans des systèmes numériques de télécommunication à l'alternat WO2008019539A1 (fr)

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