Apparatus and method for measuring propagation delay in an...

Details Apparatus and method for measuring propagation delay in an... Apparatus and method for measuring propagation delay in an...

2005-10-18

2005-10-18

Pham, Chi (Department: 2663)

Multiplex communications

Duplex

Communication over free space

C370S335000, C370S342000

Reexamination Certificate

active

06956829

ABSTRACT:
Disclosed is a method for measuring a propagation delay value of a frame transmitted by a UE (User Equipment) to a Node B in a TDD (Time Division Duplexing) mobile communication system. The UE acquires synchronization with the Node B based on a downlink pilot channel signal transmitted in a period of a downlink pilot time slot, and determines an estimated round trip delay value T1by comparing transmission power of a physical common channel signal in a first time slot with reception power of the same signal. The UE receives a transmission point correcting value T2through a forward physical access channel (FPACH) signal transmitted from the Node B in a period of one downlink time slot among the time slots, and transmits a physical random access channel (PRACH) message with the estimated round trip delay value T1at a transmission point determined based on T2and T1.

REFERENCES:
patent: 100 08 653 (2001-09-01), None
patent: WO 01/67620 (2001-09-01), None
patent: WO 01/67620 (2001-09-01), None
3G TR 25.928,1.28 Mcps Functionality for UTRA TDD Physical Layer, Jul. 1, 2000, pp 82-85.
3GPP TS 25.435,Utran Iub Interface User Plane Protocols for Common Transport Channel Data Streams, Sep. 1, 2000, p 15.
ETSI TR 125.937, 3GPP TR 25.937,Low Chip Rate TDD Iub/Iur Protocol Aspects, Mar. 1, 2001, pp 23-28.

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