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A method and device for transmitting frame information

A technology for transmitting frames and channels, applied in the field of ad hoc networks, can solve problems such as resource waste, and achieve the effects of reducing protocol overhead, improving system resource utilization, and improving system throughput

Active Publication Date: 2016-01-20
DATANG GOHIGH INTELLIGENT & CONNECTED TECH (CHONGQING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

, will also cause a huge waste of resources
[0021] In the RR-ALOHA mechanism, in addition to the occupancy status identification bit, the occupancy status identifier of each time slot in FI also points out the STI corresponding to the node occupying the corresponding time slot to identify whether a collision occurs. It also needs to be reserved when the slot is not occupied. The STI position corresponding to the time slot (such as Figure 2b shown), in addition, carrying the corresponding STI information in each FI for the time slots whose occupancy state has not changed will also cause a great waste of resources

Method used

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  • A method and device for transmitting frame information
  • A method and device for transmitting frame information
  • A method and device for transmitting frame information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Embodiment 1: There is an embodiment in which a new node has just started to apply for BC and has not received any FI of unmaintained nodes.

[0096] In this embodiment, the current superframe is an X superframe, and the length of the superframe is 7slots, for Figure 8 As shown in the schematic diagram of two-hop cluster nodes, nodes A and B stably exist in cluster 1, and nodes A and D stably exist in cluster 2. Node C has just started up and needs to request BC resources. The BCs of other nodes occupy slotlists such as Figure 9 As shown, node C heard the FI of node A and node B in the monitoring window. After the monitoring was over, it selected slot3 to send FI, and node C heard the FI of node A and node B in the subsequent feedback window.

[0097] A specific implementation process is as follows:

[0098] (1) The newly joined node C first listens to the channel, and the listening time is one superframe.

[0099] (2) Currently stable nodes, including nodes A, C, ...

Embodiment 2

[0111] Embodiment 2: There is an embodiment in which a new node has just started applying for BC and has received the FI of an unmaintained node.

[0112] The idea of ​​this implementation is the same as that of Embodiment 1, that is, the sending node needs to determine the FI this time according to the channel status information it currently maintains and the channel occupancy information maintained in the previous superframe, but for the receiving node, it is different from Embodiment 1 The most important thing is that the receiving node still receives the FI of its own unmaintained node after choosing BC. Node C only hears the FI of node B in the listening window, that is, node C does not hear the FI sent by node A, but receives the FI sent by node A in the feedback window. At this time, node A is, to node C, is an unmaintained node. In the feedback window, node C, as a receiving node, also needs to make a judgment based on the FI sent by node A, combined with its own BC, ...

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Abstract

The invention discloses a frame information (FI) transmitting method and equipment. The method comprises the following steps: a sending node achieves busy / free judgment of each time slot in a superframe; the sending node determines whether a source temporary identifier (STI) needs to be indicated for each time slot in the superframe; the sending node sets the frame information to be sent according to the determined result, wherein the frame information comprises a bitmap occupied by each time slot; a receiving node receives and acquires the frame information; and the receiving node confirms the occupation situation of the time slot according to one or several of the bitmap occupied by the current time slot, the present channel occupation situation, the FI maintenance situation of the sending node and the characteristics of the current time slot. The scheme can greatly lower the FI protocol expenditure, and improves such indexes as system resource utilization rate and system throughput.

Description

technical field [0001] The present invention relates to the technical field of ad hoc networks, in particular to a method and device for transmitting frame information (Frame Information, FI). Background technique [0002] RR-ALOHA is a TDMA-based access and resource allocation mechanism. After occupying a time slot, the node will periodically send FI, which carries the time slot occupancy situation directly perceived by itself, that is, the detected time slot usage situation in the previous superframe within one hop range. Each node can judge the occupancy of each time slot in adjacent two-hop clusters by listening to the FI sent by surrounding nodes, so as to realize the reuse of time slot resources among one-hop (OH) clusters with disjoint coverage. [0003] figure 1 It is a schematic diagram of a terminal propagating FI in single-hop clusters A, B and C in the prior art. see figure 1 As shown, 1-7 in the figure represent nodes, and elliptical areas A, B, and C repres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16
Inventor 冯媛赵毅赵丽李凤周海军
Owner DATANG GOHIGH INTELLIGENT & CONNECTED TECH (CHONGQING) CO LTD