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Method and network nodes for facilitating timing synchronization in a network

A network node, timing synchronization technology, applied in the field of communication, can solve the problem of increased signaling overhead

Active Publication Date: 2019-05-31
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in signaling overhead required to exchange timing information between each pair of nodes can be significant, especially when there are a large number of nodes e.g. in UDN

Method used

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  • Method and network nodes for facilitating timing synchronization in a network
  • Method and network nodes for facilitating timing synchronization in a network
  • Method and network nodes for facilitating timing synchronization in a network

Examples

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Embodiment Construction

[0029] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the following examples are for illustration only and do not limit the scope of the present disclosure.

[0030] Before describing the embodiments of the present disclosure, the mathematical model of timing estimation will be introduced first. At node i, the timing value of node j is estimated and can be expressed as:

[0031]

[0032] in is the estimated timing value of node j, β j is the actual timing value of node j (that is, the timing when node j actually sends the synchronization signal), β′ j is the estimation error due to, for example, the quality of the radio link between node i and node j, and PD ji Indicates the propagation delay of the synchronization signal from node j to node i. Timing values ​​can be estimated by utilizing non-coherent detection algorithms, such as the maximum likelihood (ML) algorithm or the...

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PUM

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Abstract

The disclosure provides a method for facilitating timing synchronization in a network. The method comprises, at a network node: updating a timing value of the network node iteratively based on synchronization signals from neighboring network nodes; determining that the timing value is in a stable state; calculating a bias due to propagation delays of the synchronization signals based on a number of timing values obtained in iterations of said updating; and correcting the timing value based on the bias.

Description

technical field [0001] The present disclosure relates to communication technologies, and more particularly to methods and network nodes for facilitating timing synchronization in a network. Background technique [0002] The ultimate goal of mobile broadband is to deliver ubiquitous, sustainable, unlimited data rates to anyone or anything, anytime, anywhere. Ultra-dense networks (UDNs) are a promising next step towards the successful introduction of long-term evolution (LTE) for wide-area and local-area access. UDN can be deployed in areas with high traffic consumption, and thus provides an evolution for the aforementioned goals. Due to the overprovisioning of access nodes and the resulting low average load in the access network, even under realistic assumptions about user density and traffic, UDN produces ubiquity for delivering desired data rates to users. access opportunities. [0003] Overprovisioning is achieved through an extremely dense grid of access nodes. Inter-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26
CPCH04W56/002H04L43/16H04W4/06
Inventor 卢前溪缪庆育乔纳斯·科罗南德
Owner TELEFON AB LM ERICSSON (PUBL)