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Concluding validity of uplink synchronization parameter

A technique for synchronizing parameters and effectiveness, applied in the direction of synchronization devices, multiplexing communication, time division multiplexing systems, etc., can solve problems such as difficult calculations, and achieve the effect of easy effectiveness

Inactive Publication Date: 2009-05-27
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Unlike circuit-switched wireless systems, in packet-switched wireless systems, timing advance calculations are more difficult because there may not necessarily be a persistent traffic flow from the user equipment to the Node B

Method used

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  • Concluding validity of uplink synchronization parameter
  • Concluding validity of uplink synchronization parameter
  • Concluding validity of uplink synchronization parameter

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] refer to figure 1 , consider the example of a packet-switched wireless system. The wireless system may be, for example, the Universal Mobile Telecommunications System (UMTS). The wireless system can provide high-speed packet data services. The high-speed packet data service may be High-Speed ​​Downlink Packet Access (HSDPA) standardized by 3GPP (3rd Generation Partnership Project). The wireless system may use a multi-carrier data transmission scheme, such as Orthogonal Frequency Division Multiplexing (OFDM), for high-speed packet data services. The wireless system may comprise EUTRAN (Evolved UMTS Terrestrial Radio Access Network).

[0023] figure 1 Only two network elements are shown: a Node B 100 and a user equipment 102, but it should be understood that a packet switched wireless system may also include other types of network elements. The number of network elements may also vary according to both geographic coverage and number of users.

[0024] Throughout thi...

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PUM

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Abstract

Concluding the validity of an uplink synchronization parameter, such as a timing advance, in a packet-switched radio system. The method includes: detecting (802) an uplink synchronization parameter; measuring (804) an interval from the detection of the uplink synchronization parameter; and comparing (806, 808) the measured interval with a predetermined threshold and, if the measured interval is shorter than the predetermined threshold, concluding (810) that the detected uplink synchronization parameter is still valid, or else concluding (812) that the detected uplink synchronization parameter is no more valid.

Description

technical field [0001] The invention relates to a network element for a packet-switched radio system, a device for determining the validity of uplink synchronization parameters in a packet-switched radio system, a user equipment for a packet-switched radio system, a device for a packet-switched radio system Node B, method for determining the validity of an uplink synchronization parameter in a packet-switched radio system, computer program of instructions for executing a computer process for determining the validity of an uplink synchronization parameter in a packet-switched radio network Encoded computer program products and integrated circuits for network elements of packet-switched wireless systems. Background technique [0002] In most wireless systems, wireless transmissions from various user equipments must be synchronized when received by Node Bs. User equipment may be located at various distances from the Node B, and the propagation delay of wireless transmissions f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B7/26H04J3/06
CPCH04J3/0682H04J3/0632H04W56/0045H04B7/2681
Inventor L·达尔斯加阿德
Owner NOKIA TECH OY
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