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Enhanced RTS (ready to send)-enhanced CTS (clear to send) protocol method and device for supporting uplink MU-MIMO (multi-user multiple input multiple output)

A protocol and purpose technology, applied in the field of enhanced RTS-enhanced CTS protocol supporting uplink MU-MIMO, can solve the problem of low transmission efficiency of wireless systems, and achieve the effect of improving data transmission efficiency

Inactive Publication Date: 2014-04-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device supporting uplink MU-MIMO enhanced RTS-enhanced CTS protocol to solve the problem of low transmission efficiency of the wireless system when multiple users upload data in a short time

Method used

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  • Enhanced RTS (ready to send)-enhanced CTS (clear to send) protocol method and device for supporting uplink MU-MIMO (multi-user multiple input multiple output)
  • Enhanced RTS (ready to send)-enhanced CTS (clear to send) protocol method and device for supporting uplink MU-MIMO (multi-user multiple input multiple output)
  • Enhanced RTS (ready to send)-enhanced CTS (clear to send) protocol method and device for supporting uplink MU-MIMO (multi-user multiple input multiple output)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see figure 2 , this embodiment proposes to use the advantages of AP multi-antenna, according to a certain criterion, the data streams of multiple users suitable for simultaneous transmission are regarded as different antennas of the same user terminal to form a virtual MIMO system, that is, uplink MU-MIMO. Here, the user STA is the source end that sends the eRTS, and the AP is the destination end that receives the eRTS.

[0050] Concrete implementation steps are as follows:

[0051] S201. Through a certain pre-trigger mechanism, the AP starts a timer and / or a counter, and waits for the STA to send an eRTS.

[0052] S202. The AP selects the best STA combination suitable for simultaneous transmission of uplink data according to certain criteria among the users successfully detecting the eRTS, and delivers the eCTS to the STA combination.

[0053] S203. The STAs in the STA combination send data to the AP.

[0054] S204. After receiving the data, the AP returns eACKs to...

Embodiment 2

[0063] see image 3 , this embodiment provides a device supporting uplink MU-MIMO enhanced RTS-enhanced CTS (eRTS-eCTS) protocol, including: a destination end and a multi-source end including multiple source ends, the source end includes a sending unit, the The stated destination includes a receiving storage unit and a decision-making unit.

[0064] The sending unit is configured to send eRTS to the destination;

[0065] The receiving storage unit is configured to receive the eRTS sent by the sending unit;

[0066] The decision-making unit is configured to determine a source terminal corresponding to the eRTS based on the eRTS, select an optimal source terminal combination for simultaneously sending uplink data according to a predetermined criterion, and send an eCTS to the optimal source terminal combination.

[0067] Through the above technical solution, the decision-making unit of the destination end selects the best source-end combination that simultaneously sends uplink...

Embodiment 3

[0072]see Figure 4 and Figure 5 , this embodiment provides a device supporting uplink MU-MIMO enhanced RTS-enhanced CTS (eRTS-eCTS) protocol, including: a destination end and a multi-source end including multiple source ends, the source end includes a sending unit, the The destination end includes a pre-processing unit, a receiving storage unit and a decision-making unit.

[0073] The sending unit is configured to send the eRTS to the destination.

[0074] The preprocessing unit is used to determine the length of the waiting time window, issue the allowed access strength parameter, and optionally broadcast a call for transfer identifier (CFT).

[0075] The receiving storage unit is configured to receive and store a user's data transmission request (eRTS) within a given time window.

[0076] The decision-making unit is configured to determine a source terminal corresponding to the eRTS based on the eRTS, select an optimal source-end combination for simultaneously sending u...

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Abstract

The invention provides an enhanced RTS (ready to send)-enhanced CTS (clear to send) protocol method for supporting uplink MU-MIMO (multi-user multiple input multiple output). The method comprises the following steps that each source end in multiple source ends respectively sends enhanced RTS to the target end; the target end receives a plurality of enhanced RTSs, and the source ends corresponding to the enhanced RTS are determined on the basis of the enhanced RTS, in addition, the optimum source end combination of the uplink data is simultaneously sent according to the preset criterion, and the enhanced CTS is sent to the optimum source end combination. The method provided by the invention has the advantages that the target end selects the optimum source end combination for simultaneously sending the uplink data according to the preset criterion, in addition, the enhanced CTS is sent to the optimum source end combination, and each source end in the optimum source end combination sends data to the target end. The method provided by the invention has the advantages that a plurality of source ends are allowed to simultaneously send the source end data to the target end, the advantage of many target end antennas is sufficiently utilized, and the frequency spectrum efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of multi-source MIMO wireless communication systems, in particular to a method and device for supporting uplink MU-MIMO enhanced RTS-enhanced CTS protocol, which is suitable for multiple source terminals uploading data within a short period of time. Background technique [0002] MAC of IEEE802.11 defines two media access control methods: DCF (distributed coordination function) and PCF (point coordination function). In order to avoid conflicts when two stations that are invisible to each other (that is, wireless signals cannot reach each other) send information to a third station (generally located in the middle of the two sending stations) that both parties can reach at the same time, DCF defines RTS / The CTS message switch is made as an auxiliary medium access method. [0003] When two stations that are invisible to each other (that is, wireless signals cannot reach each other) send signals to a th...

Claims

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Application Information

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IPC IPC(8): H04W72/14
Inventor 李云洲张知微张艳许希斌王京扈俊刚
Owner TSINGHUA UNIV
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