Timing synchronization of mesh points in a wireless communication network

A timing synchronization function, grid point technology, applied in the field of wireless networks, can solve problems such as classification of difficult grid devices, and achieve the effect of easy implementation

Active Publication Date: 2007-03-28
ARRIS ENTERPRISES LLC
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  • Claims
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Problems solved by technology

[0003] The diversity of available devices in the mesh creates interesting challenges for synchron

Method used

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  • Timing synchronization of mesh points in a wireless communication network
  • Timing synchronization of mesh points in a wireless communication network
  • Timing synchronization of mesh points in a wireless communication network

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Embodiment Construction

[0013] The proposed beacon generation algorithm for mesh networks includes elements of the IEEE 802.11 standard. For example, MAP follows the beacon generation algorithm of the infrastructure mode. This provides enough flexibility for the MAP to choose its own BSS parameters so that it can transmit beacons every beacon interval and avoid frequency synchronization with other MPs. Non-AP mesh devices, on the other hand, follow the IBSS mode of operation regarding beacon generation when synchronizing with other MPs.

[0014] Referring to FIG. 1 , a system diagram illustrates electronic devices operating in a mesh cluster 110 and an infrastructure network 105 in accordance with some embodiments of the present invention. Operating in the infrastructure network 105 is a MAP 130, and a plurality of basic service set stations s1...s4, including s4 125, which may be legacy stations (legacy stations may also be referred to herein as STAs). Operating in the mesh cluster 110 are a numbe...

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Abstract

A method is used by a mesh point that includes one or more step of receiving one of a beacon and probe response from an other mesh point; setting a state of whether the mesh point is already synchronized with one or more peers to true and performing a beacon timing synchronization function when the mesh point is in the unsynchronized state and the other mesh point requests synchronization from a peer mesh point; adding an identity of the other mesh point to a database of beacon senders maintained by the mesh point and performing a beacon timing synchronization function when the mesh point and the other mesh point are both synchronized; and providing indications of whether the mesh point supports synchronization, requests synchronization from a peer mesh point, and is already synchronized with one or more peer.

Description

technical field [0001] The present invention relates generally to wireless networks, and in particular to a method used by a wireless mesh network. Background technique [0002] The IEEE 802.11 standard at the time of filing of this application outlines two mechanisms for providing timing synchronization among stations. In the infrastructure mode of operation, the access point (AP) is the timing master of the basic service set (BSS), and stations always accept timing synchronization beacon information transmitted by the AP. However, in the Independent Basic Service Set (IBSS) mode of operation, the Timing Synchronization Function (TSF) is performed in a distributed manner by all stations, and the stations in the IBSS employ timing received from Any beacon or probe response with a TSF value of its own TSF timer. [0003] The diversity of devices available in a mesh creates interesting challenges for synchronization and beacon generation because of the difficulty of strictly...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L7/00
CPCH04W48/16Y02B60/50H04W48/08H04W56/001Y02D30/70H04W28/00H04W56/00
Inventor 史蒂芬·P·埃梅奥特赫里希凯什·戈赛因
Owner ARRIS ENTERPRISES LLC
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