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Independent basic service set (IBSS) system and power management method thereof

A basic service group and processing flow technology, applied in the field of independent basic service group IBSS system and its power management, can solve the problems of reducing system efficiency, consuming more energy, and unable to guarantee priority sending of beacons, etc., to reduce sending and save energy , the effect of reducing the active time

Active Publication Date: 2011-09-14
北京万海云科技有限公司
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AI Technical Summary

Problems solved by technology

[0027] It can be seen that in the existing 802.11 IBSS power management mechanism, the frame body of the ATIM frame is empty, and in the ATIM window, all nodes remain active, which consumes a lot of energy and reduces the system efficiency; in addition, there are Nodes sending MSDUs and nodes without MSDUs use the same priority to compete to send beacons. The beacons complete the timing synchronization function, but there is no guarantee that nodes with MSDUs to send send beacons first.

Method used

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  • Independent basic service set (IBSS) system and power management method thereof
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  • Independent basic service set (IBSS) system and power management method thereof

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Embodiment Construction

[0040]In the present invention, the IBSS power management mechanism in the existing 802.11 standard is improved, the transmission of the ATIM frame is canceled, the function of the ATIM frame is replaced by the beacon frame, and the transition mechanism between the active state and the sleep state Modifications have been made, and other mechanisms remain unchanged. details as follows:

[0041] At each TBTT, each node in the IBSS shall:

[0042] 1) Delay the decrement of the transmission backoff timer for any pending non-beacon frames;

[0043] 2) If there is no MSDU to send, wait for the distributed inter-frame space (DIFS), if no beacon frame is received during DIFS, then go to 3), if a beacon frame is received during DIFS, execute beacon Frame reception processing flow; if there is an MSDU to be sent, then directly transfer to 3);

[0044] 3) Calculate a random delay time, which is uniformly distributed between zero and twice the product of the minimum contention window a...

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Abstract

The invention discloses an independent basic service set (IBSS) system and a power management method thereof. The method comprises the following steps: canceling the transmission of an ATIM (announcement traffic indication message) frame; if each node in IBSS does not have MSDU (MAC Server Data Unit) to send within each TBTT (target beacon transmission time), waiting for DIFS (distributed interframe space); if a beacon frame is not received during the period of DIFS, executing the processing procedure of a random delay timer; if the beacon frame is received during the period of DIFS, analyzing the traffic indication map (TIM) field of the received beacon frame; judging whether to receive MSDU based on the TIM field; and if the MSDU is to be received, keeping an active state; otherwise, turning to a sleep state. Through the technical scheme of the invention, the node energy is saved and the system efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an independent basic service set (IBSS) system and a power management method thereof. Background technique [0002] The Independent Basic Service Set (IBSS) in the IEEE Std 802.11 standard is commonly referred to as an ad hoc network. The wireless nodes that make up the IBSS are mainly powered by batteries, which can only provide limited energy. At present, due to the constraints of battery manufacturing technology, it is difficult to achieve a breakthrough increase in battery capacity under the condition of maintaining a certain weight of the battery; on the other hand, the performance of mobile nodes is constantly improving, and the functions are becoming more and more powerful, and the demand for power supply is also increasing. Strong, so it is necessary to study new technologies to reduce energy consumption and extend power usage time. [0003] A node operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W84/18
CPCY02B60/50Y02D30/70
Inventor 秦殿云
Owner 北京万海云科技有限公司
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