Resource competition method and station

A resource competition and site technology, applied in the resource competition method and site field, can solve problems such as solutions without multiple user resource competition, and achieve the effects of improving resource competition advantages, ensuring reliability, and improving system throughput

Active Publication Date: 2012-03-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The improved version of the IEEE 802.11ac protocol will support MU-MIMO transmission,...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The Backoff Time corresponding to each destination station in the MU-MIMO physical frame is independently generated, and the smallest Backoff Time is selected: In order to ensure the priority of MU-MIMO resource competition, the smallest backoff window in the MU-MIMO physical frame is used as the DCF resource during transmission basis for competition. Assuming that a MU-MIMO needs to be sent to K destination stations, the CW corresponding to each destination station is still based on CW=2 M+2 -1 is obtained, then

[0057] Backoff Time1 of destination station 1=Rand[0, CW]*aSlotTime,

[0058] Backoff Time2 of destination station 2=Rand[0, CW]*aSlotTime,...,

[0059] Backoff TimeK of destination station K=Rand[0, CW]*aSlotTime,

[0060] The MU-MIMO physical frame is the MPDU (MAC layer data unit)

[0061] Backoff Time=Min[Backoff Time1, Backoff Time2,..., Backoff TimeK] formula (3)

[0062] When each successful transmission or the number of transmission failures is g...

Embodiment 2

[0064] The CW of each destination station of the MU-MIMO physical frame is independently counted. Among the multiple Backoff Time corresponding to different destination stations of the MU-MIMO physical frame, as long as there is one Backoff Time to 0, the MU-MIMO physical frame is sent. If If the backoff time is 0 but the medium is busy, then the CW is recalculated for the destination station corresponding to the Backoff time of 0, and a new Backoff time is generated according to Backoff Time=Rand[0, CW]*aSlotTime, and the Backoff time of other destination stations is not affected. The impact of the Backoff time corresponding to the destination site still decreases in order according to the stored value. Assuming that the Backoff Time corresponding to the destination station 1 of the MU-MIMO physical frame is 0 first and the detection medium is busy, the Backoff Time corresponding to the destination station 1 is regenerated according to the following formula, and the Backoff Ti...

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Abstract

The invention discloses a resource competition method and a station. The method comprises the following steps that: during multi-user multiple input multiple output (MU-MIMO) data are in downlink transmission, a source station judges minimum back-off time in back-off time which corresponds to an MU-MIMO physical frame, and takes the minimum back-off time as a parameter of distributed coordination function (DCF) or enhanced distributed channel access (EDCA) resource competition; and the source station competes against other source stations for resources by using the DCF resource competition parameter or the EDCA resource competition parameter.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a resource competition method and a station. Background technique [0002] The IEEE 802.11ac system transmits MU-MIMO (Multi-User Multiple Input Multiple Output, multi-user multiple input multiple output), that is, multiple users send data on the same time-frequency resource. MU-MIMO can improve system throughput and effectively increase spectrum utilization, and is an important technology of IEEE802.11ac. [0003] In the IEEE802.11 standard, the distributed coordination function (Distributed Coordination Function, referred to as DCF) is a contention-based resource allocation method. In the DCF mode, when a station in the WLAN prepares to transmit a packet, it first determines a backoff time initial The value (BackoffInitial, BI for short), BI is a value randomly selected between (0, CW) interval, where CW is called "Contention Window". Contention window CW is the key to c...

Claims

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Application Information

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IPC IPC(8): H04W28/08H04L1/18H04L1/06
Inventor 姜静李峰孙波
Owner ZTE CORP
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