Architecture for TOA positioning with LMU control functionality in BSC
First Claim
1. A wireless communications system capable of delivering Time Of Arrival (TOA) positioning data to at least one externally operated and maintained requesting agent said system comprising:
- a gateway to said external agent said gateway providing an interface to said requesting agent;
a Base Station Subsystem (BSS), including a Base Station Controller (BSC), serving at least one mobile set for which TOA positioning data is requested, said BSS accessible by said requesting agent through said gateway; and
an array of Location Management Units (LMUs) configured to compute positioning coordinates for said mobile set wherein each said LMU is adapted to monitor a synchronization burst from a cell associated with said LMU for clocking a Time Division Multiple Access (TDMA) frame number against said frame number s absolute time, the relation between said frame number and said absolute time being sent to said BSC periodically wherein each said LMU indicates a new establishment cause when sending a channel request or when said channel request is sent in response to a BSC request. wherein said BSS Includes a set of positioning functions adapted to determine which of said LMUs are appropriate for making TOA measurements for positioning of said mobile set.
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Accused Products
Abstract
A wireless communications system (40b) capable of delivering Time Of Arrival (TOA) positioning data to at least one externally operated and maintained requesting agent (12), including a gateway (14a, 14b) to the external agent (12), which provides an interface to the requesting agent (12). The system (40b)also includes a Base Station Subsystem (BSS) (62) and an array of Location Management Units (LMUs) (24). The BSS (62) serves at least one mobile set (26) for which TOA positioning data is requested and is accessible by the requesting agent (12) through the gateway (14a, 14b). The LMUs (24) are configured to compute positioning coordinates for the mobile set (26), wherein the BSS (62) includes positioning functions (16) are moved to the BSC (20) or integrated within the BTS (22) so that control of the LMUs (24) is accomplished at the BSS (62).
70 Citations
23 Claims
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1. A wireless communications system capable of delivering Time Of Arrival (TOA) positioning data to at least one externally operated and maintained requesting agent said system comprising:
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a gateway to said external agent said gateway providing an interface to said requesting agent;
a Base Station Subsystem (BSS), including a Base Station Controller (BSC), serving at least one mobile set for which TOA positioning data is requested, said BSS accessible by said requesting agent through said gateway; and
an array of Location Management Units (LMUs) configured to compute positioning coordinates for said mobile set wherein each said LMU is adapted to monitor a synchronization burst from a cell associated with said LMU for clocking a Time Division Multiple Access (TDMA) frame number against said frame number s absolute time, the relation between said frame number and said absolute time being sent to said BSC periodically wherein each said LMU indicates a new establishment cause when sending a channel request or when said channel request is sent in response to a BSC request. wherein said BSS Includes a set of positioning functions adapted to determine which of said LMUs are appropriate for making TOA measurements for positioning of said mobile set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a wireless communications system, a method of delivering Time Of Arrival (TOA) positioning data to at least one externally operated and maintained requesting agent said method comprising the steps of:
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receiving a positioning request from a Mobile Location Centre (MLC) via a Mobile service Switching Center (MSC) Base Station System Mobile Application Part (BSSMAP) message;
monitoring a synchronization burst of each Location Management Unit (LMU) in an array of LMUs and clocking a Time Division Multiple Access (TDMA) frame number with said frame number s absolute time;
maintaining a database for storing data regarding the relation between said TDMA frame number and said frame numbers absolute time for each said LMU'"'"'s cell;
determining the LMUs appropriate for TOA measurement for said positioning and sending the result to a Base Station Controller, said LMUs adapted to measure the TOA of handover (HO) bursts generated by the mobile set and send the result to said BSC;
selecting a channel for positioning handover;
setting up a connection to said LMUs;
configuring said LMUs for TOA measurement wherein said TOA measurement comprises configuration data;
ordering the mobile set to perform positioning handover on the selected channel; and
packing all measurements from different LMUs and sending them to the MLC where the position is calculated. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification