Method for associating time slots with links between network nodes of a wireless interconnected network
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A technology of network nodes and time slots, applied in the field of data transmission and wireless networking, can solve problems such as large overall delay
Inactive Publication Date: 2012-10-03
SIEMENS AG
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Although the known scheduling methods ensure the inconsistency of the data transmission, they observe the individual communication requests separately from each other, which leads to a large overall delay depending on the data of all communication requests
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[0020] An embodiment of the method according to the invention for a multi-hop mesh network is described below, in which data packets are transmitted on a time-slot basis using a suitable standard, such as for example WirelessHART. The method according to the invention embodies a novel allocation of time slots to corresponding radio links between network nodes and fulfills multiple communication requirements for the corresponding data transmission in the form of different source and destination nodes The central allocation of the time slots. This method ensures a low delay time while ensuring high data transmission reliability.
[0021] figure 1 By way of example, a wireless networking network is shown, in which the method according to the invention can be used. The network comprises a plurality of network nodes 1, 2, . . . , 16 arranged in a square in space. Individual network nodes can communicate wirelessly with adjacent network nodes, which is indicated by corresponding ...
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Abstract
The invention relates to a method for associating time slots (S0, S1,..., S20) with links (L1, L2,..., L6) between network nodes (1, 2,..., 16) of a wireless interconnected network of a plurality of network nodes. Data are thereby transmitted in the network on a time slot basis by means of the association of the time slots (S0, S1,..., S20) to be used with the links (L1, L2,..., L6) on a plurality of channels (C0, C1, C2).; According to the invention, a plurality of traffic requests are prescribed, wherein each traffic request specifies a data transfer between the source node (5, 15) and a destination node (8, 3), sets one or more time slot sequences, wherein a time slot sequence describes a time-based sequence of association of time slots (S0, S1,..., S20) with links (L1, L2,..., L6) between adjacent network nodes (1, 2,..., 16) of a transmission path between the source node (5, 15) and the destination node (8, 3). According to the invention, an association scheme for data transmission via a plurality of channels (C0, C1, C2) is determined, considering all prescribed traffic requests, based on an optimization criterion, designed such that the number of the time slots (S0, S1,..., S20) used in the association scheme is as low as possible.; Interlacing of the time slots (S0, S1,..., S20) is further permitted within the association scheme, such that a time slot (S0, S1,..., S20) associated exclusively with one or more links (L1, L2,..., L6) of one or more other second time slot sequences can be disposed between two time slots (S0, S1,..., S20) each associated with a link (L1, L2,..., L6) of a first time slot sequence.
Description
technical field [0001] The invention relates to a method for assigning time slots to links between network nodes of a wireless networking network and a method for data transmission using the method for time slot assignment. Furthermore, the invention also relates to a network management unit and a wireless networking network. Background technique [0002] Wireless networking networks are often also called mesh networks (Mesh networks), which are based on the principle that a number of wireless communication-capable network nodes communicate with each other via so-called Transfer data from one network node to another. In this case, the network is constructed in such a way that within range of a network node there are several further network nodes to which data can be transmitted. In the context of data transmission in mesh networks, scheduling methods are used, by means of which time slots are assigned to corresponding links between two network nodes, wherein the links can ...
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