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Resource competition method and station

A resource competition and site technology, applied in the field of resource competition methods and sites, can solve problems such as solutions without multiple user resource competition

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, but currently in the MU-MIMO DCF mode, there is no solution for multiple user resource competition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Among the n stations, the parameter corresponding to the station with the highest service priority is used as the resource competition parameter, and the resource competition rule follows the SU-MIMO DCF resource competition rule, and resource reservation or resource competition is always performed with this resource competition parameter. The specific process is as follows:

[0088] When the multi-site MPDU (MAC protocol data unit, media protocol data unit) is ready to be sent, the CW (competition window) in the resource competition parameters is calculated according to the following formula:

[0089] CW=2 M+2 -1 Formula (1)

[0090] In the formula, M is the number of sending failures of the current source site.

[0091] The backoff time is calculated according to the following formula:

[0092] Backoff Time=Rand[0, CW]*aSlotTime Formula (2)

[0093] Among them, Rand is a random number between [0, CW]. If the physical resource is busy when the backoff time is 0, t...

Embodiment 2

[0096] Among the n station STAs, the MPDU (MAC protocol data unit, media protocol data unit) of each STA is associated with SLRC or SSRC, and the station corresponding to the smallest SLRC threshold (dot11longRetryLimit) or SSRC threshold (dot11shortRetryLimit) associated with each station is specified The parameter is the resource competition parameter, and the resource competition rule is in accordance with the SU-MIMO DCF resource competition rule, and resource reservation or resource competition is always performed with this resource competition parameter. The specific process is as follows:

[0097] When multi-site MPDUs are ready to be sent, the CW in the resource competition parameters is calculated according to the following formula:

[0098] CW=2 M+2 -1 Formula (1)

[0099] In the formula, M is the number of current sending failures.

[0100] The back-off time is calculated according to the following formula

[0101] Backoff Time=Rand[0, CW]*aSlotTime Formula (2) ...

Embodiment 3

[0105] Among the n stations, the parameter corresponding to the station whose group position in the specified Group ID is the first, second, third, or fourth is the resource competition parameter, and the rules for competing resources follow the DCF resources of SU-MIMO Competition rules, resource competition is always carried out with this resource competition parameter. The specific process is as follows:

[0106] When multi-site MPDUs are ready to be sent, the CW (backoff window) in the resource competition parameters is calculated according to the following formula:

[0107] CW=2 M+2 -1 Formula (1)

[0108] In the formula, M is the number of current sending failures.

[0109] The back-off time is calculated according to the following formula

[0110] Backoff Time=Rand[0, CW]*aSlotTime Formula (2)

[0111] Among them, Rand is a random number between [0, CW]. If the backoff time is 0 and the physical resource is busy, the Backoff Time is regenerated, where Backoff Time...

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Abstract

The invention discloses a resource competition method and a station. The resource competition method comprises the following steps that: during multi-user multiple input multiple output (MU-MIMO) data downlink transmission, a source station selects a target station from a group of target stations according to a predetermined rule, wherein a parameter which corresponds to the selected target station is taken 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 present invention relates to the field of wireless communication, more specifically, to a resource competition method and 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 IEEE 802.11 standard, the Distributed Coordination Function (DCF) is a contention-based resource allocation method. In the DCF mode, when a station in the WLAN is about to transmit a packet, it first determines an initial value of the backoff time (Backoff Initial, BI for short), BI is a value randomly selected between the (0, CW) interval, where CW is called the "Contention Window". Contention window CW is the key to congestion control in 802....

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W74/08
CPCH04W74/08
Inventor 姜静李峰田开波李楠
Owner ZTE CORP
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