A Channel Resource Allocation Method Based on Time Division Multiplexing

A technology of channel resource and allocation method, applied in the field of channel resource allocation based on time division multiplexing, can solve problems such as inflexibility and lack of consideration of differences in transmission data requirements.

Inactive Publication Date: 2011-12-14
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] This existing technology only allocates one time slot to nodes at a time when allocating time slots, whic...

Method used

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  • A Channel Resource Allocation Method Based on Time Division Multiplexing
  • A Channel Resource Allocation Method Based on Time Division Multiplexing
  • A Channel Resource Allocation Method Based on Time Division Multiplexing

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Embodiment Construction

[0057] For multi-hop networks with unequal nodes such as MESH networks, the existing STDMA time slot allocation technology does not take into account the differences of nodes, the service quality of nodes is not fair, and cannot be allocated on demand.

[0058] Suppose the network is hierarchical, such as Figure 4 shown. A multi-hop self-organizing network is formed between nodes. Different from ordinary multi-hop self-organizing network, the data of this network needs to be sent to or received from the external network through the egress gateway. In other words, data has a flow direction. From a node to a gateway is called uplink, and from a gateway to a node is called downlink. Therefore, although the nodes in the network are the same in terms of equipment, their tasks are very different due to their different positions from the egress gateway. In this network, in addition to sending its own data, nodes also need to forward the data of other nodes. Nodes that are close...

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Abstract

The invention discloses a channel resource allocation method based on time division multiplexing. The method comprises the following steps that: 1, nodes detect status flags, and send data packets in mini-slots corresponding to the first stage of the current time slot control part according to the status flags; and the first stage of the current time slot control part has N mini-slots, and N is the number of the nodes; 2, the nodes generate data packets to be transmitted according to the data packets received in the first stage of the current time slot control part, and transmit the data packets to be transmitted in the mini-slots corresponding to the second stage of the current time slot control part; and the second stage of the current time slot control part has N mini-slots; and 3, thenodes calculate competition results according to the data packets received in the first stage and the second stage of the current time slot control part, and update the status flags of the nodes according to the competition results; and the nodes successful in competition send data in reserved time slots. By using the method, the nodes can reserve a plurality of time slots.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a channel resource allocation method based on time division multiplexing. Background technique [0002] Time Division Multiplexing (TDMA) is an important medium access method. The TDMA technology divides channel resources from the time domain into small time slices, and allocates these small time slices to nodes that need to use wireless resources. Time slices are often called slots. Each node can send data in the time slot allocated to itself, but can only receive data but not send at other times. In this way, conflicts caused by nodes sending data at the same time can be avoided. As a mature communication technology, TDMA is widely used in various wired communication and wireless communication networks. [0003] In the traditional TDMA mode, one time slot corresponds to one node, and this mode can be called flat TDMA (Flat TDMA, FTDMA). With a multi-hop network such a...

Claims

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Application Information

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IPC IPC(8): H04W72/04
Inventor 李莉刘韵洁陈建亚
Owner BEIJING UNIV OF POSTS & TELECOMM
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