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TR 45.811 (RAN6)
Uplink - Time Difference Of Arrival (U-TDOA) in GSM and GPRS

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V6.0.0 (Wzip)    2002/07    73 p.

Rapporteur:  Mr. Gross, Robert
See also:  –

This TR describes how the Uplink Time Difference Of Arrival (U-TDOA) location method works in GSM and GPRS environments.


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1 Scope    2 References    3 Abbreviations    3.1 Abbreviations    4 U-TDOA: System Description    4.1 Overview    4.2 Block Diagram    5 U-TDOA: Performance Analysis    5.1 Introduction    5.2 Review of the Fundamental Drivers of Location Accuracy    5.3 Comparison of GSM Versus IS-136 TDMA    5.4 Modelling Methodology    5.5 Conclusion    6 U-TDOA: System Impacts    6.1 Protocol Impacts    6.2 Impacts to Existing Nodes    6.3 Network Capacity Impacts    6.4 Impact on Specifications    7 U-TDOA Call Flows    7.1 Packet Switched    7.2 Circuit Switched    8 Implementation Considerations    8.1 Physical Implementation of the LMU    8.2 Latency    8.3 Synchronization    8.4 Location Determination Capacity    8.5 MS Power Control    8.6 Operation with Repeaters    8.7 Privacy    9 U-TDOA Advantages and Disadvantages    9.1 Advantages of U-TDOA    9.2 Disadvantages of U-TDOA    10 Conclusion    A Analysis of GSM and GPRS Uplink Time Difference of Arrival (U-TDOA)    A.1 Introduction    A.2 Review of the Fundamental Drivers of Location Accuracy    A.3 Comparison of GSM Versus TDMA    A.4 Comparison of U-TDOA and E-OTD Performance    A.5 Conclusion    B Functional Description of Predictive Model    B.1 Calculation of rms error weighted HDOP    B.2 The HDOP Calculation    B.3 Calculation of partial derivatives    C Change history   


1   Scope   Word-p. 6
2   References
3   Abbreviations
4   U-TDOA: System Description   Word-p. 7
5   U-TDOA: Performance Analysis   Word-p. 9
6   U-TDOA: System Impacts
7   U-TDOA Call Flows   Word-p. 20
8   Implementation Considerations   Word-p. 25
9   U-TDOA Advantages and Disadvantages   Word-p. 28      Up
10   Conclusion
A   Analysis of GSM and GPRS Uplink Time Difference of Arrival (U-TDOA)   Word-p. 30
B   Functional Description of Predictive Model   Word-p. 68
C   Change history   Word-p. 72

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